Tucson DX & ST
(Model 8702)

GAS-FIRED DIRECT-VENT HEATER

Owner's Manual
Installation & Operating
Instructions
Read This Manual in Its Entirety
Operate And Maintain This Gas Heater
According To This Instruction Manual.
SAVE THESE INSTRUCTIONS!

WARNING: FOLLOW THE INFORMATION IN
THESE INSTRUCTIONS EXACTLY, IF NOT, A FIRE
OR EXPLOSION MAY RESULT CAUSINGPROPERTY DAMAGE, PERSONAL INJURY OR
LOSS OF LIFE.
WARNING: DO NOT STORE OR USE GASOLINEOR ANY OTHER FLAMMABLE VAPORS AND
LIQUIDS NEAR THIS OR ANY OTHER GASAPPLIANCE.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch electrical switches; do not use the phone
in your building.
Immediately call your gas supplier from a phone
outside the structure. Follow your gas supplier’s
instructions.
If you cannot reach your gas supplier, call the fire
department or 911.
A qualified installer, service agency, or gas supplier must
perform installation and service of this appliance. In the
Commonwealth of Massachusetts, all installation of gaslines and gas fittings must be performed by a licensed gas
fitter or licensed plumber.

AVERTISSEMENT: ASSUREZ-VOUS DE BIEN
SUIVRE LES INSTRUCTIONS DONNÉ DANSCETTE NOTICE POUR RÉDUIRE AU MINIMUM LE
RISQUE D’INCENDIE OU POUR ÉVITER TOUT
DOMMAGE MATÉERIEL, TOUTE BLESSURE OU
LA MORT.
AVERTISSEMENT: NE PAS ENTRESPOSER NIUTILISER D’ESSENCE NI D’AUTRE VAPERURSOU LIQUIDES INFLAMMABLES DANS LEVOISINAGE DE CET APPRAREIL OU DE TOUTAUTRE APPAREIL.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
Ne pas tenter d’allumer d’appareil.
Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones se trouvant dans le batiment où vous
vous trouvez.
Appelez immédiatement votre fournisseur de gaz
depuis un voisin. Suivez les instructions dufournisseur.
Si vous ne pouvez rejoindre le fournisseur de gaz,appelez le service dos incendies.
L’installation et service doit être exécuté par un qualifié
installer, agence de service ou le fournisseur de gaz.
Hearthstone Quality Home Heating Products, Inc. ®
Tucson DX/ST Model 8702
Manual: 6400-40461
R: 2 - 7/28/2011

Intentionally Blank

Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Information Sheet
Use this page to record all relevant information concerning the purchase, installation, and maintenance of yourTucson Model 8702 Direct -Vent heater. This information will facilitate servicing, purchase of replacement parts,
and warranty claims (if necessary). Keep your original receipt in a safe place as proof of purchase.
Serial Number:
Fuel type:

Natural Gas

Liquid Propane

Sold by:Address:
Phone:
E-mailDate of Purchase:

Website:Installed by:
Address:
Phone:
E-mailDate of Installation:

Website:Gas Supplier:Address:
Phone:
E-mailWebsite:Read this Owner’s Manual before installing, or operating your TUCSON.
reference.

Retain this manual for future

SERVICE RECORD
Date

Who Performed WorkWHAT
Firebox Cleaning.............
Glass Cleaning................
Door Gasket....................

Work PerformedWHEN
annually
as needed
Replacement as needed

3

Notes:Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Table of Contents
INTRODUCTION ...........................................................................................................................................................4
SAFETY INFORMATION ................................................................................................................................................6
PROFLAME CONTROL SYSTEM & FEATURES ................................................................................................................8
Tucson 8702 ST Model Overview............................................................................................................................... 8
Tucson 8702 DX Model Overview .............................................................................................................................. 9Control Functions ..................................................................................................................................................... 10

SPECIFICATIONS .......................................................................................................................................................12
INSTALLATION PREPARATION ....................................................................................................................................13
Codes ....................................................................................................................................................................... 13
Items Required for Installation .................................................................................................................................. 13
Packing List .............................................................................................................................................................. 13
Unpacking and Inspection ........................................................................................................................................ 13

CLEARANCES TO COMBUSTIBLES ..............................................................................................................................16
Clearance to Combustibles....................................................................................................................................... 16
Hearth Requirement/Floor Protection ....................................................................................................................... 16

VENTING INFORMATION .............................................................................................................................................18
Venting Components ................................................................................................................................................ 18
Minimum Venting Installation Instructions ................................................................................................................ 21

ELECTRICAL SYSTEM INFORMATION ..........................................................................................................................24
GAS SUPPLY & CONNECTIONS ..................................................................................................................................27
Gas Connections ...................................................................................................................................................... 28

HEAT WAVE BAFFLE, LOG SET, & SCREEN PLACEMENT ............................................................................................29
Installation of the Heat Wave Baffle.......................................................................................................................... 29
Installation of the Log Set ......................................................................................................................................... 30
Installation of the Optional Screen............................................................................................................................ 31
Removal of Log Set .................................................................................................................................................. 31
Completing the Installation ....................................................................................................................................... 31

STONE INSTALLATION ...............................................................................................................................................32
LIGHTING & OPERATION ...........................................................................................................................................34
Lighting Instructions.................................................................................................................................................. 34
Initial Adjustments .................................................................................................................................................... 34
Daily Operation......................................................................................................................................................... 36

ROUTINE MAINTENANCE AND CARE ...........................................................................................................................38
Cleaning ................................................................................................................................................................... 38
Monthly: .................................................................................................................................................................... 38
Annually:................................................................................................................................................................... 38
As Needed:............................................................................................................................................................... 39

PARTS LIST ..............................................................................................................................................................40
TROUBLESHOOTING ..................................................................................................................................................41
RATING LABEL .........................................................................................................................................................43

Introduction

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Congratulations on your purchase of the Tucson
Model 8702, Gas-Fired Direct-Vent heater. The
Tucson, by Hearthstone, incorporates the latest in
direct vent gas technology, which will provide youwith clean, efficient heat for years to come. The
combination of natural stones and enameled or
painted cast iron gives the Tucson a pleasing lookthat is maintained with minimum care.

b. Thermostatic mode to turn on/off based
upon room temperature.
c. “Smart” thermostatic mode to modulate
flame levels automatically as the unit
approaches the set point temperature.
d. Additional outlet controlled by theremote.
2. “Child-safe” lock-out on remote control.
3. “Low Battery” indicator for Transmitter on remotecontrol
4. Blower Assembly

The Tucson will provide you with years of practicaland convenient service. However, as with any gas
appliance, the unit must be properly and safely
installed and maintained by qualified service
personnel to ensure safe and trouble-free operation.

Part #

Tucson Model 8702 features:
1. Proflame Control System
2. 5-piece log set
3. Heat Wave Baffle for maximum radiant heat
output.
4. Platinum Bright Embers
5. The option to toggle back and forth between an
Intermittent (IPI) or Continuous (CPI) pilot mode.
a. The IPI mode allows the most efficientuse of gas, burning the pilot only when
the thermostat calls for the burner toignite.
b. The CPI mode runs the pilot
continuously keeping the firebox warmer
thus promoting better draft in colder
climates.
6. Battery backup for functionality during power
outages.

8702-0010ST
8702-0020ST
97-68000

Standard Matte Black w/o Stone
Standard Brown Enamel w/o Stone
ST to DX Conversion Kit (optional)

8702-0010DX
8702-0020DX

Deluxe Matte Black w/o Stone
Deluxe Brown Enamel w/o StoneDX Version

Stone Sets:
9702-41
9702-53

Soapstone Kit – Tucson 8702
Autumn Brown Granite Kit – 8702

Read this Owner’s Manual
Operate and maintain this gas heater according to
the instructions in this manual. For your safety, andyears of trouble free operation, read this manual inits entirety.
Heater Must Be Installed and Maintained By
Qualified Service Personnel
Verify the gas connections and venting systems
meet the requirements of local, regional or national
installation codes. Qualified service personnel must
inspect the gas heater before use, and at least
annually.

The ST (Standard) version features:
1.
2.
3.
4.

Description
ST Version

Manual Hi/Lo Flame control
Manual On/Off/Thermostat Mode switch
Remote Control - optional
Thermostat - optional

Manufactured & warranted by:Hearthstone Quality Home heating Products, Inc.
317 Stafford Ave.
Morrisville, VT 05661
www.hearthstonestoves.com

The DX (Deluxe) version features:
1. Proflame GTMF Systema. Thermostatic Remote Control
i. Six (6) flame levels, adjustable
via the remoteii. Six (6) blower speeds,
adjustable via the remote

5Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Safety Information
Your Tucson is a very attractive and extremely
efficient heater, utilizing today’s best technologies.
By following a few simple safety precautions and by
performing minimal maintenance, the unit will remain
appealing while providing years of quality
performance.

Vent Only to the Outside
Never vent the gas heater to other rooms orbuildings.

Service Caution
If you believe your Tucson is not, in any way,
performing properly, immediately discontinue
operation until the unit is inspected and approved byqualified service personnel. Prior to servicing theunit, turn the gas to the valve off, and disconnect
any electrical source. Ensure the unit is cool prior toservicing and cleaning. Replace any safety screen,
guard, or component removed during servicing prior
to operation. Use of any components not supplied byHearthstone on the stove voids all warranties. Do
not substitute components.

The installation must conform to local codes or, in
the absences of local codes, the current National
Fuel Gas Code, ANSI Z223.1 (NFPA 54) or
CAN/CGA B149 Installation Code. (Installer
l’appareil selon les codes ou réglements locaux, ou,
en l’absence de tells réglements, selon les Codes
d’installation CAN/CGA B149.)
CAUTION: DO NOT USE THIS APPLIANCE IF ANYPART WAS UNDER WATER. IMMEDIATELY CALLA QUALIFIED SERVICE TECHNICIAN TO INSPECTTHE HEATER AND TO REPLACE ANY PART OF
THE CONTROL SYSTEM AND GAS CONTROLTHAT HAS BEEN UNDER WATER. (NE PAS SESERVIR DE CET APPAREIL S’IL A ÉTÉ PLONGÉDANS L’EAU, COMPLÉTEMENT OU EN PARTIE.
APPELER UN TECHNICIEN QUALIFIÉ POUR
INSPECTOR L’APPAREIL ET REMPLACER TOUTE
PARTIE DU SYSTÉME DE CONTRÔLE ET TOUTE
COMMANDE QUI ONT ÉTÉ PLUNGES DANSL’LAU.)Hot Surfaces
Certain exposed surfaces of the Tucson will reachhigh temperatures during normal operation.
Clearances to combustibles must be maintained, as
specified in the “Clearances To Combustibles”
section of this manual.
DUE TO HIGH TEMPERATURES THE APPLIANCESHOULD BE LOCATED OUT OF TRAFFIC AND
AWAY
FROM
FURNITURE,
DRAPERIES,
CLOTHING AND FLAMMABLE MATERIALS.

During the first few hours of operation the appliance
may produce smoke and/or odor. This is normal
during the first several burns and also after long
periods when the stove is not burned. During these
initial burns, open a window(s) to assist in theremoval of the smoke/odor.

CHILDREN AND ADULTS SHOULD BE ALERTEDTO THE HAZARDS OF HIGH SURFACETEMPERATURES AND SHOULD STAY AWAY TO
AVOID BURNS TO SKIN OR CLOTHING IGNITION.
YOUNG CHILDREN SHOULD BE CAREFULLYSUPERVISED WHEN IN THE SAME ROOM AS THE
APPLIANCE.

The appliance and its individual shutoff valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of ½ psig. (3.5k Pa). The
appliance must be isolated from the gas supply
piping system by closing its individual manual
shutoff valve during any pressure testing of the gas
supply piping system at test pressures equal to orless than ½ psig (3.5k Pa).

CLOTHING OR OTHER FLAMMABLE MATERIALSHOULD NOT BE PLACED ON OR NEAR THE
APPLIANCE.
(SURVEILLE LES ENFANTS.
GARDER LESVÊTEMENTS, LES MEUBLES, L’ESSENCE OU
AUTRES LIQUIDES À VAPEUR INFLAMMABLES
LIN DE L’APPAREIL.)

Fire Hazard

CLEAN THE AREA AROUND, UNDER, AND
BEHIND THE UNIT ON A REGULAR BASIS TOPREVENT THE ACCUMULATION OF DUST AND
LINT.

Do not store or use gasoline or other flammablevapors or liquids in the vicinity of this appliance.
Locate the Tucson out of traffic areas and away fromfurniture, draperies, clothing, and flammablematerial.

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Proper Fuel

Ceramic Logs, Burner, & Baffle

This gas heater is designed to burn natural gas (NG)or with conversion, liquid propane (LP). Never burn
any fuel gas not intended for use with this unit.
Never burn paper, wood, or other materials in thisappliance.

If the decorative ceramic log, burner, or bafflematerial supplied with the Tucson is damaged or
parts are missing, they must be replaced with thesame, or approved Hearthstone replacement parts.
These components affect the combustion quality
and safety of the heater. Do not replace ceramiclogs, the burner, or baffle with unapproved ceramiccomponents or any other material.

This heater is factory equipped to burn natural gas(NG). To burn propane (LP), you must purchase an
LP conversion kit (97-56100 {ST}, 97-56104 {DX}).

We recommend you always wear gloves and safety
goggles while handling the ceramic log set, Heat
Wave baffle, and burner materials.

This appliance is only for use with the type(s) of gas
indicated on the rating plate. This appliance is notconvertible for use with other gases, unless acertified kit is used. Cet appareil doit être atilisé
uniquement avec les types de gas indiqués sur laplaque signalétique. Ne pas l’utiliser avec d’autres
gas sauf si un kited conversion certifié est installé. )Electrical Hazard
If present, any three-prong grounded plug must be
plugged directly into a properly grounded threeprong receptacle. Do not cut or remove thegrounding prong from any plug or otherwise attempt
to circumvent the grounding protection provided withthe unit. The Tucson must be electrically groundedin accordance with local codes, or in the absence of
local codes, with the National Electrical Code,ANSI.NFPA 70 in the U.S. or CSA C22.1 CanadianElectrical Code in Canada.

WARNING: THIS GAS APPLIANCE MUST NOT BECONNECTED TO A CHIMNEY FLUE SERVING ASEPARATE GAS OR SOLID-FUEL BURNINGAPPLIANCEWARNING: DO NOT OPERATE THE APPLIANCE
WITH THE FRONT GLASS REMOVED, CRACKED,
OR BROKEN.
REPLACEMENT OF GLASSSHOULD BE DONE BY A LICENSED ORQUALIFIED SERVICE PERSON.
ONLY OPEN
FRONT FOR ROUTINE SERVICE. DO NOT SLAMFRONT OR STRIKE GLASS.

Do Not Light Pilot or Burner by Hand
The pilot light on this gas heater is lit by using anelectronic ignition module as described elsewhere inthis manual. Never attempt to light the pilot or mainburner by hand with a match or lighter.

WARNING: HEARTHSTONE RECOMMENDS THATONLY AN NFI CERTIFIED SERVICE TECHNICIANINSTALLS, AND REPAIRS THIS APPLIANCE. A
QUALIFIEDSERVICETECHNICIANMUSTINSPECT THE APPLIANCE BEFORE USE, AND AT
LEAST ANNUALLY. MORE FREQUENT CLEANING
MAY BE REQUIRED DUE TO EXCESSIVE LINTFROM CARPETING, BEDDING MATERIAL, PETS,
ETC. IT IS IMPERATIVE THAT THE CONTROLCOMPARTMENTS, BURNERS, AND CIRCULATING
AIR PASSAGES OF THE APPLIANCE ARE KEPT
CLEAN
AND
FREE
OF
OBSTRUCTIONS.
(S’ASSURER QUE LE BRÛLEUR ET LECOMPARTIMENT DES COMMANDES SONTPROPRES.
VOIRLESINSTRUCTIONS
D’INSTALLATIONETD’UTILISATIONQUIACCOMPAGNENT L’APPAREIL.)

Mobile Home Installations
This appliance may be installed as an aftermarket
appliance in a permanently located, manufactured(mobile) home, where not prohibited by local codes.
(Cet appareil peut être installé dans un maison
préfabriquée (mobile) déjá installée á demeure si lesréglements locaux le permettent.

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Proflame Control System & Features
NOTE: OPEN DOOR UNDER THE ASH LIP AND REMOVE MODESTY PANEL FOR ACCESS TO ELECTRICAL
AND GAS CONNECTIONS.

Tucson 8702 ST Model Overview

Connect the thermostat wires to the wire harness
with the provided connection kit as per the
instructions on page 26. At the thermostat, connect
the wires to the thermostat per the instructions
received with the thermostat. Take care not to overtighten the connection screws and not to damage theinternal parts of the thermostat.

Power Supply
For the Tucson ST the power supply is the AC/DCPower Adapter. This is packaged inside theaccessory box. To connect the adapter, simply
connect the output lead to the wire under the stovemarked “DC-SUPPLY”. Plug the input end into thenearest 120V standard outlet.

Proflame DFC Ignition ModuleThis is the command center for the appliance. The
DFC Module allows the pilot to run in the IPI mode or
the CPI mode. It signals the burner to light or shut
down and provides the ignitor with the electricity
needed for sparking. The DFC Module is powered by
the DC adaptor when 120V power is available or by
the backup batteries during a power outage.

Thermostat (sold separately)
You can connect to and control the Tucson ST with awall thermostat. The ON/OFF/T’stat switch or wall
mounted thermostat controls the Tucson.
Werecommend installation of a thermostat for more
comfortable performance, however you may stilloverride the thermostat by setting the switch to “ON”.
The thermostat controls the unit by “calling for heat.”
The thermostat turns the unit on when the room iscold, and turns the unit off once the room is warmed
sufficiently. The thermostat is controlled by a 750
millivolt DC two-wire circuit.

SIT Manual Gas Valve
The valve has a manual flame turndown knob. This
control manually adjusts the flame height at thedesired level. All the gas flows through the valve andis regulated by the built in regulator.

Thermostat Placement

Pilot AssemblyPlace the thermostat in the same room or living
space as the unit. Typically 5’ (1.5m) off the floor andaway from any influences that may cause thetemperature in the vicinity of the thermostat to be
unrepresentative of the room temperature in general.
Such influences might include strong lighting, aheater vent from the central heating system, or a
nearby drafty window.

The pilot assembly consists of a pilot hood, sensor
rod, and ignitor. The ignitor sends a spark to the pilot
hood which ignites the gas and lights the pilot. With
the pilot lit the sensor rod is engulfed by the flame,
flame rectification occurs and the appliance remains
lit. If the sensor does not stay engulfed by the flame
the main burner will not light and the pilot will shut
down.

Placement of the thermostat on an inside wall rather
than an outside wall is preferable. Do not place thethermostat directly behind or too close to the unit,
otherwise, heat from the unit will immediately satisfy
the thermostat and turn the unit off.

Optional Remote Control (for ST model)
The Tucson ST does not come equipped with aremote control. However there are two different
optional remote controls available. Both of the remotecontrols are capable of turning the unit on and off.
One of the optional remotes also allows you tocontrol the temperature of the stove, (in the same
way the thermostat controls the heater), fromanywhere in the vicinity of the unit. If “ON” & “OFF”
are the only controls required, use Kit #90-56912. If
you would like to control the temperature via theremote control thermostat, use Kit #90-56914.
Installation instructions are provided with the kits.

Thermostat Wiring (sold separately)
Connect the thermostat to the Tucson ST using no
more than 40’ (12 m) of insulated thermostat wire.
The thermostat wire can be surface mounted orrouted under the floor, through walls, etc. Ensure you
leave a small coil of additional thermostat wire behind
the Tucson so that the unit is easily moved out of
position for servicing and cleaning.

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

ON selection turns the valve on (to high) if theRemote becomes inoperative.

Tucson 8702 DX Model Overview
Proflame GTMF System

Fan Control Module
The Fan Control Module (FCM) is the main power
supply for the entire system when 120v AC isavailable. The FCM is part of the blower assembly(packaged separately). The FCM provides two 120V
remotely controlled outlets, and one constantly
powered outlet. The FCM allows the remote tocontrol the fan unit through 6 speeds and turns theauxiliary outlet on and off. This module also powers
the Receiver and Ignition Module with 6v DC, making
the batteries in the Receiver a backup power source
expanding the life of the batteries. When 120V power
is not available the FCM will not operate.
The FCM is equipped with a three-prong (grounding)plug for protection against shock hazard and shouldbe plugged directly into a properly grounded threeprong receptacle. Do not cut or remove the grounding
prong from the plug.

Photo 1 – Proflame GTMF System
The Proflame GTMF is a modular remote control
system that directs the functions of Tucson DX. The
Proflame GTMF System is configured to control theon/off main burner operation, its flame levels, andprovides Manual and Smart thermostatic control of
the hearth appliance. The system controls two
remotely actuated 120V/60Hz power outlets. The Fanoutlet controls the fan speed through six levels, and
the Auxiliary outlet either on or off. There is also an
additional constantly powered 120V/60Hz outlet. The
system has battery backup power for burner
operation and control during power outages (seepage 25 for specifications).

Proflame DFC Ignition ModuleThis is the command center for the appliance. The
DFC Module allows the pilot to run in the Intermittent(IPI) mode or the Constant (CPI) mode. It signals theburner to light or shut down and provides the ignitor
with the electricity needed for sparking. The DFC
Module is powered by the FCM when 120V power isavailable or by the batteries in the Receiver during a
power outage.

SIT Modulating Gas Valve
Remote Transmitter

The remote transmitter can modulate the valve andthe flame to 6 different settings between high andlow. You can modulate the flame via the remoteyourself or by setting the remote control to the Smart
Thermostat modulation mode. Smart mode meansthat as the room temperature approaches the limit set
for shut down the valve will automatically gradually
step down the flame height. The reverse happens
when the room cools - the valve will automatically
gradually increase the flame height.

The Tucson DX comes equipped with a thermostatic
remote control transmitter. The easy to read LCD
display shows all functional abilities as well as achildproof lockout and low battery indicator. It
displays room temperature readout, set temperature
readout and function status. The remote transmitter ispowered by three 1.5 volt AAA batteries. A Mode Key
is provided to index between the features and a
Thermostat Key is used to turn on/off or index
through thermostat functions.

Pilot Assembly
ReceiverThe pilot assembly consists of a pilot hood, sensor
rod, and ignitor. The ignitor sends a spark to the pilot
hood which ignites the gas and lights the pilot. With
the pilot lit the sensor rod is engulfed by the flame,
flame rectification occurs and the appliance remains
lit. If the sensor does not stay engulfed by the flame
the main burner will not light and the pilot will shutdown.

The Receiver accepts commands via radio frequency
from the Remote to operate the appliance. The
Receiver is powered (6V DC) by the Fan Control
Module and uses four 1.5 volt AA type batteries forbackup during power outages. The Receiver’s slider
switch is set to one of three positions: ON (Manual
Override), REMOTE (Remote Control) or OFF. The

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Control Functions
Pilot Mode
Continuous Pilot (CPI): Running the Tucson 8702 in CPI mode will keep your pilot running even when thethermostat does not call for heat and when the burner is not lit. This is an advantage in cold climates or underwindy conditions. The “standing pilot” helps to keep the venting warm and generate some draft within thesystem. The standing pilot also keeps the firebox warm – greatly minimizing, or eliminating condensation
formation on the glass during startup. The ignitor will automatically spark whenever the pilot mode is switched to
CPI, regardless of the position of the receiver switch.
Intermittent Pilot (IPI): Using the IPI mode is a more efficient use of fuel as the pilot only ignites when thethermostat calls for heat.

Photo 2 – Pilot Mode Switch

Remote Receiver (DX Only)
The Receiver is normally powered by the Fan Control Module or by four 1.5V AA batteries during a power
outage. The Receiver switch can be set to three different positions:
On: Manual override allowing the valve to function and ignite the burner without the remote transmitter. The
ignitor will spark automatically.
Remote: Remote Transmitter controls all functions of components.
Off: Turns off the stove. If CPI mode is selected, pilot will remain lit.
PRG: Used to synchronize the Transmitter and Receiver initially, and after each battery change (see page 39).

Photo 3 – Receiver Detail10Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Remote Transmitter (DX Model)

Photo 4 – Remote Transmitter Function Keys (remote color may differ from shown)
ON/OFF Key: Controls the main burner, blower, andthe modulation of both.

Mode Key: Toggles through the component to becontrolled (burner, blower or auxiliary outlet)

Thermostat Key: This is the function that sets either
the Manual or Smart thermostatic control.

The transmitter features a user-friendly layout with aBlue LCD Screen for easier viewing.

UP/Down Arrow Key: Adjusts the thermostat
temperature range, flame settings, and fan speed.

Figure 1: Remote Transmitter Display Data

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Specifications
LISTED: Gas-Fired Direct-Vent Fireplace Heater
Model: Tucson Direct-Vent Gas Fireplace
Heater (8702)
Testing Agency: Intertek Testing Services
NA, Inc. (ITS)
Tested to: ANSI Z21.88-2005, CSA 2.33b
2005, CAN/CGA2.17-M91
Certified for Canada, CSA P.4.1
Approved for Mobile Home Installation (seepage 7)

Certified for use by:
Board of State Examiners of Plumbers & Gasfitters
100 Cambridge Street, Room 1511
Boston, MA 02202
www.mass.gov

Figure 2: Model 8702 Dimensions
Specification
INPUT RATING (Btu/hr) 0-2000 ft
INPUT RATING (Btu/hr) 2000-4500 ft
ORIFICE SIZE (DMS) 0-2000 ft
ORIFICE SIZE (DMS) 2000-4500 ft
MANIFOLD PRESSURE - LO SETTING (in. W.c./kpa)
MANIFOLD PRESSURE - HI SETTING (in. W.c./kpa)
INLET PRESSURE - MINIMUM (in.w.c./kpa)
INLET PRESSURE – MAXIMUM (in. w.c./kpa)
MINIMUM INPUT RATING LO SETTING (btu/hr)
MAXIMUM OUTPUT (btu/hr) 0-2000 ft

12NG
25,00024,20041
42
1.6/0.4
3.5/0.87
5.0/1.24
7.0/1.74
18,00017,350LP
25,00024,80053
54
6.4/1.59
10.0/2.48
12.0/2.99
13/3.22
21,60019,100Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Installation Preparation
Codes

Items Required for Installation

Adhere to all local codes or, in their absence, thelatest edition of THE NATIONAL FUEL GAS CODEANSI Z223.1 (NFPA 54) or CAN/CGA B149 (Installer
l’appareil selon les codes ou règlements locaux, ou,
en l’absence de tels règlements, selon les Codes
d’installation CAN/CGA-B149.)

Accessory stone set
External regulator (for propane (LP) only)
LP conversion kit (not included, for propane
only))
Piping which complies with local codes
Pipe sealant approved for use withpropane (LP) (resistant to sulfur compounds).
Manual shutoff valve
Sediment trap (see page 27)
120 volt electrical service (Required for DX
model, optional for ST model)
Pipe wrench
Phillips head screwdriver
7/16-inch wrench
3/16” hex wrench
Other parts as required by local code
Safety Glasses
GlovesInstallation Codes can be obtained from:AMERICAN NATIONAL STANDARDSINSTITUTE, INC.
1430 BROADWAYNEW YORK, NY 10018
www.ansi.org
NATIONAL FIRE PROTECTION ASSOCIATION,
INC.
BATTERY MARCH PARKQUINCY, MA 02269
www.nfpa.org

The appliance when installed must be electricallyconnected and grounded in accordance with local
codes or, in the absence of local codes, with thecurrent NFPA 70-National Electrical Code or CSA
C22.1-Canadian Electric Code.

Packing List
1- Tucson 8702 Gas-Fired Heater
1- Owner’s Packet Envelope (manual, warranty card)
1- Heat Wave Baffle (box on pallet)
1- Optional Screen Kit (in box with baffle)
5- Decorative Ceramic Logs (in firebox)
1- Enamel Touch-up Paint (in firebox)
1- Blower Assembly Box (DX Model) (on pallet)
1- Accessory Box (on pallet) containing:
1- Remote Control w/batteries (DX Model)
1- AC/DC Adaptor (ST Model)
1- 1” Valve Ctrl Extension Knob (ST Only)
1- Thermostat wire kit (ST Only)
1- 1 Package of four AA Batteries
1- Bag of Platinum Bright Embers
2- Side Stone Shields
2- Top Stone Clips
1- Bag of Screws
6- ¼ x 20 x 3/8” Pan Head4- ¼ x 20 x 1” Leg leveling screws
1- 5/16 x 1” Flat Head hex drive

A manufactured home (mobile) OEM installation must
conform to the Manufactured Home Construction and
Safety Standard, Title 24 CFR, Part 3280 (U.S.) or
Standard for Manufactured Home Installation,
ANSI/NCBCS A225.1 or Standard for Gas Equipped
Recreational Vehicles and mobile Housing, CSA
Z240.4.CAN/SCA Z240 MH (Canada). (Installer
l’appareil selon les codes ou règlements locaux, ou,
en l’absence de tels règlements, selon les Codes
d’installation CAN/CGA-B149.)
This appliance is equipped for use at 0 to 2000 feet
(0-610 meters) altitude. (Cet appareil est equipè pourdes altitudes compries entre 0 et 2000 pieds (0-610m) seulement.)
WARNING: DO NOT INSTALL OR USE THISAPPLIANCE IF ANY PART WAS SUBMERGED
UNDER WATER.
IMMEDIATELY CALL AQUALIFIED SERVICE TECHNICIAN TO INSPECTTHE HEATER AND TO REPLACE ANY PART OF
THE CONTROL SYSTEM AND GAS CONTROLTHAT WAS UNDER WATER. (NE PAS SE SERVIRDE CET APPAREIL S’IL A ÉTÉ PLONGÉ DANSL’EAU, COMPLÈTEMENT OU EN PARTIE.
APPELER UN TECHNICIEN QUALIFIÉ POUR
INSPECTOR L’APPAREIL ET REMPLACER TOUTE
PARTIE DU SYSTÈME DE CONTRÔLE ET TOUTE
COMMANDE QUI ONT ÉTÉ PLONGÉS DANSL’LAU)

Note: Vent kits and components are supplied
separately. Failure to use the venting
components approved by Hearthstone for thisappliance will void your warranty.

Unpacking and Inspection
Hearthstone packages your Tucson to withstandnormal shipment without damage. However, damage
can still occur during transit. Take care to inspect fordamage when unpacking and installing the unit.

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Tucson DX/ST Model 8702

DO NOT INSTALL, OR PUT INTO SERVICE, A
DAMAGED OR INCOMPLETE HEATER.

taking care to avoid damaging components mounted
under the stove.

Note: We recommend you position your Tucson,
attach the venting, make the gas, electrical andthermostat (if applicable) connections, and attach
any accessories before installing the stone set.

Remove the shrink-wrap and other packaging
materials taking care not to damage the stove’s
finish. Inspect the Tucson for visible or concealed
damage. The unit should be square and true. The
stone set should be complete and without damage.
The sheet metal parts should be smooth and free ofbends and dents. Any enameled cast iron should befree of chips or cracks. If visible or concealed
damage is found or suspected, contact your dealer
for instructions.

Photo 5 – Rear Shipping Clip Detail

Always use gloves and eye protection when handlingthe decorative ceramic fire logs, burner, and Heat
Wave baffle. Use care when handling these parts asthey are fragile and subject to damage and breakage
if handled roughly.
See the firebox access instructions on page 15 andremove the log set. Unpack and inspect the logs fordamage. Inspect the ceramic burner. Open the otherboxes and inspect the components. If log, burner,
baffle, or any other component damage isencountered, contact your dealer for a replacement.
Otherwise, set the logs and other components aside
until called for during the installation.

Photo 6 – Front Shipping Clip Detail (right side shown)

Installing Leg Levelers
If your hearth surface in uneven, or is not level, you
can install the four provided leveling screws. The ¼ x
20 x 1” oval tip set screws are installed down throughthe threaded hole in the inner flange on the bottom of
the stove’s feet. Adjust the screws only enough tokeep the stove from rocking, or wobbling. On
thinner hearths, or hearth pads, adjusting the screws
so the entire stove’s weight is solely supported onthem can cause damage to your hearth.

Dismounting from Pallet
With the accessory boxes removed and set aside,
remove the three screws that fasten the unit to theshipping stands on the pallet (see photos 5 & 6).
Take care not to mar or chip the stove’s finish. Have
someone help lift the stove forward and off the pallet,

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Firebox Access
1. First, remove the top of the stove (lift off). Set
carefully aside on a soft surface.

Photo 10 – Front Panel Retaining Slots
3. If installed, remove screen by lifting off glass
frame.

Photo 7 – Removing Top
1. Leave the top heat shield in place – no need toremove for firebox access.

Photo 11 – Screen Detail
4. Pull forward and disengage the spring clips
securing the top of the glass frame. See Photo
12. Tilt the top of the glass frame outward and lift
it out of the slots on the bottom – set carefully
aside.

Photo 8 - Top Heat Shield
2. Lift the front panel slightly to disengage the tangs
at its top – tilt the front toward you slightly and lift
it up out of the bottom slots and set aside on asoft surface.

Photo 12 – Glass Spring Clip Detail
5. Reinstall by reversing the previous steps. If
desired, you do not need to reinstall the screen.

Photo 9 – Front Panel Mounting Tang Detail15

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Tucson DX/ST Model 8702

Clearances to Combustibles
Note: Ensure clearances are in accordancewith local installation codes and therequirements of the gas supplier.

Clearance to Combustibles
Due to high surface temperatures, locate the unit outof traffic areas and away from furniture anddraperies. Do not place clothing and otherflammable material on or near the heater. When
positioning the unit always maintain adequate
clearances around air openings into the combustion
chamber and allow for adequate ventilation.
Minimum clearances to combustibles must be
maintained as shown in Figures 3 - 6.
Note: The rear clearance to combustibles isdetermined by either the unit’s or the vent pipe’s
minimum clearance, depending on whether the
installation calls for vertical rise within the room or arear exit, through-the-wall vent pipe.

Figure 3: Minimum Wall Clearances

Ensure you consider the need for access to the gas
control valve access door on the front of the unit aswell as full access for periodic cleaning andservicing. Also consider clearance for the blower
assembly if present, or planned in the future.
CAUTION: THESE CLEARANCES REPRESENTMINIMUM DISTANCES IN ALL CASES, WHICH,
THROUGH TESTING IN AN INDEPENDENTLABORATORY TO ANSI AND CSA STANDARDS,WILL PREVENT FIRE OR SPONTANEOUSCOMBUSTION. WE DO NOT CONTROL THE
COMBUSTIBLE MATERIALS EXPOSED TO HEATBY
THIS
PRODUCT;
THEREFORE,AN
ASSESSMENT MUST BE MADE BY THE
INSTALLER TO PREVENT CONSEQUENTIAL
DAMAGE OF WALLS AND FLOORING.

Hearth Requirement/Floor
Protection
You can place the Tucson directly on any noncombustible surface or on a wood floor. Whenplacing the Tucson on any other type of combustible
surface you must install a panel made of metal,
wood, stone, or glass under the appliance. The
panel must extending the full width and depth of theappliance. Installations must meet all local codes.

Figure 4: Horizontal Vent Mantle Clearance

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Tucson DX/ST Model 8702

The corner clearance for the Tucson 8702 is 4”,
measured from the edge of the top castings, to theadjacent wall.

Figure 6: Corner Clearance

Figure 5: Snorkel Termination Mantle Clearance

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Venting Information
Approved Venting Configurations

Venting Components
Starter collar is installed by Hearthstone.

WARNING: IN HIGH WIND AREAS AND
PARTICULARLY COLD CLIMATES IT MAY BE
NECESSARY TO HEAT YOUR VENT SYSTEM
WITH THE PILOT PRIOR TO IGNITION OF THE
MAIN BURNER. IN THESE INSTANCES IT IS
RECOMMENDED THAT YOU LEAVE THE PILOTRUNNING FOR 5 MINUTES PRIOR TO IGNITING
THE MAIN BURNER. THIS WILL ALLOW FOR
PROPER START UP AND IGNITION OF ALL
PORTS ON THE BURNER.

Use the following instructions along with the pipe
manufacturer’s instructions to complete theinstallation. Do not mix vent components fromdifferent manufacturers within the same venting
system.

Approved Venting Manufacturers
The Tucson Direct Vent (8702) is approved for
installation only with the venting components
provided by manufactures listed on this page.
Simpson Dura-Vent, Inc.
P.O. Box 1510
Vacaville, CA 95696-1510

There are three types of venting configurations
approved for use with this appliance:
Vertical Venting/Vertical Termination
Vertical Venting/Horizontal Termination
Horizontal Venting/ Snorkel Termination

800-835-4429

American Metal Products (AmeriVent)
8601 Hacks Cross Rd.
Olive Branch, MS 38654
800-423-4270

Pipe Clearances to combustibles:
1" to vertical runs
1" below and to the side of horizontal runs
2" from the top of horizontal runs

Selkirk Corporation
1301 W. President George Bush Hwy, Suite 330
Richardson, TX 75080-1139
800-992-8368

Vertical Venting and Termination

Security Chimneys International Ltd (Secure Vent)
2125 Monterey, Laval, Quebec
Canada, H7L 3T6
450-973-9999

The Tucson 8702 is approved for venting verticallythrough a roof or ceiling. When installing a verticalvent and/or vertical terminations you must adhere to
the following requirements:
When terminating vertically you must have atleast 10’ of vertical pipe.
Always maintain a minimum of 1” clearance fromall sides of the vent system to any combustible
material.
A listed fire stop is required at any floor
penetration. The opening must be framed inaccording to the venting manufacturer’s
instructions.
Steep roofs, nearby trees, or predominantly
strong windy conditions can promote poor draft
or down draft conditions. In this event, an
increase to the height of the vent may improve
performance.
A maximum of two 90⁰ or four 45⁰ elbows may
be used in vertical terminations. (This includes
the one 45⁰ elbow off the stove outlet)
Whenever possible use 45⁰ elbows instead of
90⁰ elbows as they offer less restriction to theflue gases.
Vertical terminations may require additional
restriction in order to perform as intended.

ICC, Inc.
400 J-F Kennedy, St. Jerome, Quebec
Canada, J7Y 4B7
450-565-6336
Metal-Fab, Inc.
P.O. Box 1138
Wichita, Kansas 67201

316-943-2351

Venting Terminations
The Tucson cannot be vented jointly with any othersolid fuel or gas appliance. It must be vented directly
to the outside of the building using a proper
termination as listed in this manual. After
determining the venting configuration for your stove,
select the vent system that will best accommodate
your installation.
CAUTION:
ENSUREALL
STOVE
TERMINATIONCAP
CLEARANCESOBSERVED PER THIS OWNER’S MANUAL.

AND
ARE

CAUTION: ENSURE THERE IS NO WIRING OR
PLUMBING IN THE CHOSEN LOCATION.
CAUTION:
DO
NOT
RECESSTERMINALS INTO A WALL OR SIDING.

VENTING18

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Tucson DX/ST Model 8702

Please refer to Figure 10 and Photos 13 & 14 toadjust your vent restrictor accordingly
All termination caps must be no less than 18”(457mm) horizontally from any roof or verticalsurface. See Figure 6.
The termination must fall within the chart in
Figure 10.
The maximum vertical run is 35’

The liner must have an inside dimension ordiameter 6” or greater.
Prefabricated chimneys must be UL103 or ULC
S-629 listed and have a minimum INSIDE
diameter of 6”. Prefabricated chimneys must be
listed for the specific manufacturer’s conversion
kit.
The use of an existing chimney as an air intake is
not listed under the ANSI Z21.88-1999-CSA 2.33M99 test methods; this installation has been tested
and approved by Intertek Testing Services with anappropriate test.
The code authority having
jurisdiction must be consulted prior to proceedingwith this installation method.

The vent/air intake termination clearances above thehigh side of an angled roof are as follows:
Roof Pitch
Flat to 6/12
7/12 to 9/12
10/12 to 12/12
13/12 to 16/12
17/12 to 21/12

Feet
1
2
4
6
8

Meters
0.3
0.6
1.2
1.8
2.4

Horizontal Termination
The termination must fall within the area shownin Figures 6 & 7.
A minimum of 9" rise is required either directly
off the heater or with the use of a minimum of a14” snorkel.
Use a vinyl siding Stand-Off when installingagainst vinyl siding. The termination cap mustnot be recessed into the wall or siding. Do not fill
air spaces with any type of insulation material.
A minimum 10” X10” square hole is necessary
for proper pipe clearance through a wall,
provided the vent is positioned to maintain 2”
minimum clearance at the top. A 1” minimum
clearance must be maintained to combustible
materials around the other sides.
All horizontal terminations must also comply withthe clearance specifications to adjacentstructures outlined in Figure 6.
Horizontal sections require a 1/4" rise every 12"of horizontal run.
NOTE: For each 90 0 elbow after 2, remove 5' fromthe allowable horizontal run. For Canadian
installations: remove 4' from the allowablehorizontal run.

Figure 6: Termination Cap clearances

At minimum vertical rise, maximum horizontal
run is 10’. (If a 14” snorkel termination is used amaximum horizontal run of 10’ is also
applicable.)

Prefabricated & Fireplace Chimney
Installations
The Tucson 8702 is approved for use with direct
vent chimney conversion kits in masonry or
prefabricated solid fuel listed chimneys. The
following installation requirements must be followed:

WARNING: FAILURE TO USE ONLY PARTS
SPECIFICALLY APPROVED FOR USE WITH THISAPPLIANCE MAY RESULT IN PROPERTYDAMAGE OR PERSONAL INJURY.

The termination must fall within the chart shownin Figure 10.
In a masonry chimney, a fireclay liner or listed
steel liner, must be present the entire length ofthe chimney.
The maximum length of vent is 35’.

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Figure 7: Acceptable Direct Vent Terminal Vent Cap Locations
A = Clearance above grade, veranda, porch, deck,or balcony: 12 inches (30cm) minimum.

H = *Not to be installed within 15 feet (4.5m) above
a meter/regulator assembly within 3 feet (91cm)
horizontally from the center line of the regulator.

B = Clearance to window or door that may be
opened: **Min. 9 inches U.S./*12 inches (30cm)
CAN. We recommend 12 in, minimum to prevent
condensation on the window.

I = Clearance to service regulator vent: 3 feet (91cm)
J = Clearance to non-mechanical air supply inlet tobuilding or the combustion air inlet to any otherappliance: 12inches (30cm) minimum.

C = Clearance to permanently closed window: **Min.
9 inches, U.S./*12 inches (30cm) CAN.
We recommend 12 in. minimum to prevent
condensation on the window.

K = Clearance to a mechanical air supply inlet:**Min. 3 feet (91cm) above if within 10 feethorizontally, U.S./*6 feet (1.83m) CAN minimum.

D = Vertical clearance to ventilated soffit locatedabove the termination within a horizontal distance of
2 feet (60cm) from the center line of the termination:
18 inches (46cm) minimum.

L = ¹Clearance above paved sidewalk or a paved
driveway located on public property: 7 feet (2.1m)
minimum.

E = Clearances to unventilated soffit: 12 inches(30cm) minimum.

M = ²Clearance under veranda, porch, deck, or
balcony: 12 inches (30cm) minimum.

F = Clearance to outside corner: **Min. 9 inches,
U.S./12 inches (30cm) CAN. We strongly
recommend 12 inches, particularly where windy
conditions prevail.

*In accordance with CSA B149 Installation codes.

G = Clearance to inside corner: **Min. 6 inches,
U.S./12 inches (30cm) CAN. We strongly
recommend 12 inches, particularly where strong
winds prevail.

¹A vent shall not terminate directly above a sidewalk or
driveway which is located between two single familydwellings and serves both dwellings**In accordance with the current ANSI Z223.1/NFPA 54,
National Fuel Gas Code. Note: Local Codes andRegulations may require different clearances.

²Only permitted if veranda, porch, deck or balcony, is fully
open on a minimum of two sides beneath the floor.*

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Minimum Venting Installation
Instructions
1. Install the 45º elbow over the outer collar. Placethe elbow so that the twist lock end is pointingup.
2. Install one of the 9” pipe sections into the elbow
by fully inserting it and turning approximately ¼
turn clockwise, until the 2 sections are fully
locked. Install the 90º elbow in similar fashion.
3. Move the stove and pipe assembly back until the
90º elbow is flush to the wall. The 9” vertical pipeshould be parallel to the wall. Draw a circle
around the pipe. Use the center of this circle as
the center point of the 10” x 10” square wallpass through. Cut and frame the wall passthrough.
Figure 8: Components for a Typical Snorkel
Installation

4. Place the interior wall thimble into the 10” x 10”
wall pass through. Secure it with 4 screws (notprovided). Install the exterior portion of thethimble in similar fashion, overlapping the 2sections.
CAUTION: FOR BUILDINGS WITH VINYL SIDING,INSTALL A VINYL SIDING STANDOFF BETWEEN
THE VENT CAP AND THE EXTERIOR WALL.

5. Install the horizontal vent termination on theoutside of the wall. Ensure both of the retaining
straps extend through interior wall thimble.
Before attaching the vent termination to theoutside of the house, run a bead of nonhardening mastic around its’ outside edges, so
as to make a seal between it and the wall. The
arrow on the end cap should point up. Secure
the cap to the wall with the appropriate screws.
6. Place the thimble cover onto the 90º elbow. Put
the 9” pipe into the horizontal vent cap, (the ventpipe must extend into the horizontal vent cap aminimum of 1-1/4”). Move the stove and ventpipe into position, insert the 9” pipe into the 90º
elbow and twist to lock it. Secure the straps fromthe horizontal vent termination to the interior
pipe with 2 sheet metal screws, keeping thescrews as close to wall thimble as possible.
Bend or cut the excess strapping so that thethimble cover will fit properly. Screw the thimble
cover to the wall.

Figure 9: Components for a Typical Minimum
Horizontal Venting Installation
Centerlines shown are approximate. Ensure you dry
fit your venting and take a measurement. Pipedimensions will vary by manufacturer and supplier.
These dimensions are using typical Simpson DuraVent GS components. See installation instructions
on this page (21).

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Tucson DX/ST Model 8702

flames for a wide variety of vent configurations andefficiency. The restrictor plate consists of a rotating
flap in front of the firebox exhaust port behind theceramic Heat Wave baffle plate. Depending on yourvent configuration, you may need to adjust the
restrictor plate position to reduce draft.

Restrictor Plate
The restrictor plate is used to control excess draft if
necessary. Controlling the draft also changes theaesthetics of the flame. The restrictor plate has asmall range of unlimited settings (see Photos 13 &14). The adjustment point is on the left side of thefirebox, accessible with the stones removed.

Restrictor Plate Adjustment
Loosen the screw and position the restrictor plate in
the desired location. Tighten the screw to lock inplace.

Restrictor Plate Position
The restrictor plate is factory set in the fully closed
position for shipping. Leave in the closed position
until you install the Heat Wave baffle – then set tothe fully opened position. This ensures proper

Photo 13: Restrictor Fully Closed

Photo 14: Restrictor Fully Opened (no restriction)

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Tucson DX/ST Model 8702

Figure 10: Venting Termination Diagram23

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Tucson DX/ST Model 8702

Electrical System Information
CAUTION: LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORSCAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING.
(ATTENTION: AU MOMENT DE L’ENTRETIEN DES COMMANDES, ÉTIQUETEZ TOUS LES FILS AVANT LEDÉBRANCHEMENT. DES ERREURS DE CÂBLAGE PEUVENT ENTRAÎUN FONCTIONNEMENT INADEQUATE ET
DANGEREUX.)
The proper location of wire connections is shown in the following figures.

ST Model:Figure 11: Tucson ST Wiring Diagram24

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Tucson DX/ST Model 8702

DX Model:Figure 12: Tucson DX Wiring Diagram

Figure 13: Proflame GTMF Component Specifications

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Tucson DX/ST Model 8702

ST Model Optional Thermostat Connection Installation
Optional thermostat is installed and the thermostat wires are run to the Tucson 8702 ST properly. Remove theModesty Panel for proper access to the wire connections.
1. Remove the Modesty Panel using a Phillips screwdriver to remove the 2 screws that mount the panel tothe stove. Retain the screws for reinstallation.
2. Using a 5/16” wrench, remove the nut on the IPI/CPI switch and pull the switch through the hole in thepanel.
3. Follow the wires from the ON/OFF/T-STAT switch back to their connections. Mark and disconnect thewires where they connect to the blue and white wires on the wire harness. The yellow, purple and black
wires stay connected to the switch.
4. The panel is now free to pull away from the stove.

Photo 15 – Modesty Panel Removal
Use the photo below for reference when making the following connections. (The thermostat wire should alreadyhave female connectors attached to the two wires.)1. Locate the black wire that shipped in the accessory box with your Tucson. Attach one Male end on theblack wire to one female connector on the thermostat wire.
2. Find the yellow wire that is unconnected coming from the ON/OFF/T-stat switch. Connect the Maleterminal on the yellow wire to the Female connector on the second thermostat wire.
3. Slide the T-tap terminal over the purple wire. Use a pair of pliers to crimp it in place on the purple wire.
(When crimping the T-tap down ensure it cuts through the purple wire’s insulation and into the wire
creating a connection)
4. Connect the Male terminal from the black wire (connected to the thermostat) wire to the end of the T-tap
terminal, as shown in photo below.
5. Reconnect the blue and white wires and reinstall the modesty panel.

T-Tap Terminal
Thermostat Wire
SwitchMale to Male Wire
Connector
Photo 16 – Optional Thermostat Connection Detail (switch removed for clarity)

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Gas Supply & Connections
NOTE: Ensure the gas line is installed as close to the floor as possible to avoid interference or conflict witha blower assembly installation.

Figure 14: Gas Control ValveNOTICE: A QUALIFIED TECHNICIAN MUST
CONNECT THE HEATER TO THE GAS SUPPLYAND LEAK TEST THE UNIT BEFORE IT IS
APPROVED FOR USE. CONSULT ALL CODES.
WARNING: THE UNIT MUST BE INSTALLED AND
CONNECTED IN ACCORDANCE WITH LOCALCODES, OR IN THE ABSENCE OF LOCAL CODES,WITH THE MOST CURRENT EDITION OF THE
NATIONAL FUEL GAS CODE ANSI Z223.1 (NFPA54) OR CAN/CGA B149 INSTALLATION CODE.

NFPA Code and Hearthstone require the use of
a dedicated sediment trap just upstream of theunit. Damage to the valve, or other components
due to the lack of a sediment trap are notcovered by warranty (see figure 15).
Figure 15: Sediment Trap (Typical)

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Tucson DX/ST Model 8702

If the installer must convert the unit to adjust forvarying altitudes, the information sticker (similar tothe one shown in Figure 16) must be filled out by
the installer and adhered to the appliance at the timeof conversion. For installations from 2000 – 4500
feet (610-1370 meters) use the orifice sizes(DMS) 42 for NG and 54 for LP. See the ratinglabel for more information.

Gas Connections
The gas supply connection is made to the Tucson’sgas control valve under the bottom left center of theunit using a 3/8” male NPT fitting. The supply line
should be ½” diameter, or appropriately sized toprovide a sufficient gas supply to meet the maximum
demand of the unit without undue loss of pressure.
We recommend a flexible line to avoid undue
mechanical load on the valve and to ease threadalignment, but refer to local codes.

This appliance is factory equipped for use at 0-2000
feet (0-610 meters) altitude. (Cet appareil est
equipe pour des altitudes compries entre 0 et
2000pieds (0-610m) seulment).

CAUTION: CHECK FUEL GAS TYPE!

The Tucson is factory equipped to use natural gas(NG) and requires conversion for use with propane(LP). You must purchase and install a propane (LP)fuel conversion kit if required for your installation.
Use kit 97-56100 (ST) or 97-56104 (DX). Contact
your Hearthstone dealer.

This applianc e is fac tory set for use b etween 0-2000 ft.
A conversion kit for the Tucson (8702) is available
through HearthStone and shall be used to c onvert thisa pplianc e to the appropriate altitud e. Instruc tions a reinc luded with the kit. Ask for Kit # 97-56106 for altitude
2000-4500 ft. The conversion should be c arried out ina c cordance with the requirem ents of the Authority
Having Jurisdiction.
The norm al input rating

Gas Supply
This appliance and its individual shutoff valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of ½ psig. The Tucson must be
isolated from the gas supply piping system byclosing its individual manual shutoff valve during any
pressure testing of the gas supply piping system attest pressures equal to or greater than ½ psig.

Input rating (0-2000 ft)
Input rating (2000-4500 ft)

NG
25,00024,200LP
25,00024,800This applianc e has been converted for use at ana ltitude of _______ Orific e _______
Manifold pressure ______________
Input (btu/hr) __________________Fuel Type ________
Day_______ Month ____________ Year______________
With kit number _________________________________
Conversion perform ed by:
Name: ______________________________________
Compa ny:___________________________________
Address: _____________________________________

Gas Pressure Adjustment
NOTE: A QUALIFIED TECHNICIAN MUSTPERFORM THIS PROCEDURE!

Once connected to the gas supply, the supply line
and manifold gas pressures must be tested. The
supply line pressure is tested to ensure it meets theminimum gas supply pressure as listed in thespecifications for the type of fuel in use (NG or LP).
Test by connecting a manometer to the supply line
and adjusting the incoming pressure if necessary tomeet the required supply line pressure as listed in
specifications. The manifold pressure tap on the gas
control valve, refer to Figure 14 for location.

Figure 16: Sample Information Sticker

High Altitude Installations
For high altitude installations consult the local gas
distributer or the authority having jurisdiction forproper rating methods.
The decreased atmospheric pressure at higher
altitudes affects the heat value of fuel gases. Gas
suppliers typically derate the gas intended for use atelevations above 2000 feet (610 meters). Check withyour gas supplier before derating this appliance.

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Heat Wave Baffle, Log Set, & Screen Placement
CAUTION: FRAGILE! HANDLE LOG SET WITH
CARE. ALWAYS WEAR GLOVES AND SAFETYGOGGLES WHILE HANDLING THE LOG SET.

3. Lift the front edge of the baffle up to align withthe hole in the bottom of the cast iron heatexchanger.

WARNING: Failure to position the parts inaccordance with these diagrams or failure to use
only parts specifically approved with thisappliance may result in property damage or
personal injury.

Place only the ceramic log set supplied with the unit
in the firebox. Do not place any other ceramic logs,
wood logs, or other materials in the firebox. If thelog set is damaged or broken contact your dealer for
replacement. The ceramic logs will last a long time;
however, they will break if subjected to rough or
improper handling. Exact positioning of the log set isrequired in order to obtain a pleasing flame patternand efficient combustion. Incorrect log placement
may cause carbon build-up; excess thermal stresson the log set and stove parts, reduced efficiency,
and high levels of carbon monoxide. If the log set
does not fit into the firebox exactly as outlined,
contact your dealer for assistance.

Photo 18 – Baffle Mounting Boss
4. Locate the mounting bolt and install it throughthe baffle and into the boss on the heatexchanger.

Installation of the Heat Wave Baffle
To install the heat wave baffle and log set, you musthave access to the firebox (for access instructions
see page 15).
1. Remove the Heat Wave baffle from thepackaging.
2. Set the base of the baffle centered on the shelfin the rear of the firebox.

Photo 19 – Baffle Mounting Bolt
5. Do not over tighten the bolt as it may damage or
break the baffle. When installed properly, it
should look like the baffle in the following
photos. The bottom edge of the baffle must reston the shelf. If the baffle lifts off the shelf, themounting bolt is too tight.
6. You are now ready to open the restrictor plateand install the log set.

Photo 17 – Baffle Shelf

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Tucson DX/ST Model 8702

3. Place Log 2 into the channel in the burner infront of log 1 as shown.

Installation of the Log Set(Refer to the following images in this section for log
set assembly)
1. Remove the packaging material around the log
set assembly. Be careful not to damage the log
set when unpacking.

1
2

3

4
Photo 23 – Log 2 Position

5

4. Place log 3 onto the end of log 1 as shown.

Photo 20 – Log Set Numbering
2. Place log 1 on support bracket as shown.

Photo 24 – Log 3 Position
5. Place log 4 on top of logs 1 and 2 as shown.

Photo 21 – Log 1 Mounting Detail

Photo 25 – Log 4 Position
6. Gently place Log 5 in the indentation on theburner and rest it on log 3 as shown.

Photo 22 – Log 1 in Position

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

2. Hang screen by folded lip on top of glass frameas shown in photo 28.

Photo 26 – Log 5 Position
7. Place small tufts of the Platinum Bright Emberson the burner and log surfaces for additional
glow as desired – do not block burner ports.

Photo 28 – Mounted Screen Detail

Removal of Log Set
CAUTION: THE LOG SET, BURNER, AND EMBERSRETAIN HEAT AND CAN BE VERY HOT! ALLOW
2 TO 3 HOURS TO COOL AFTER PILOT LIGHT IS
TURNED OFF FOR SAFE HANDLING.

To remove the log set, follow the Installation of Log
Set instructions in the reverse order.

Completing the Installation
1. Close the firebox – reverse the firebox
access procedure outlined on page 15.
2. Install any batteries as necessary.
Synchronize the Remote Transmitter andReceiver if applicable to your model (seepage 39).
3. Install the Blower Assembly Kit (DX Model).
See the instructions provided with the kit.
4. Install the stone set (see page 32).

Photo 27 –Platinum Bright Embers (Enlarged toShow Detail)

Installation of the Optional Screen
To install the optional screen, you must have accessto the glass frame (for access instructions see page
15).

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Tucson DX/ST Model 8702

Stone Installation
1. Remove the top casting (lift off) and lay it facedown on a clean work surface.

Photo 29
2. Loosen the two screws securing the top heatshield and slide it up and forward to remove –set carefully aside.
Photo 31
5. Slide the second stone down on top of the firststone. The two beveled edges should touch
evenly when the second stone is in position
6. Locate the side stone retaining shields. Slide
one shield down between the stone and thefirebox as shown in Photo 32.
Top Heat Shield Screws

Photo 30
3. Installing the side stones. Locate the four sidestones. Arrange the stones so the grain runs inthe same direction.
4. Slide one stone down the side of the stove
between the cast iron and the firebox as shownin Photo 31. Ensure the beveled edges are on
the top and bottom and facing out. Slide it down
until the stone is resting on the bottom plate.

Photo 32
7. Repeat Steps 1 through 4 on the other side of
the stove. Your side stones are now in place.
a. HINT: The side shields should provide
enough tension to hold the stones out
against the side castings so they do not
rattle, yet not so much tension that they
are difficult to install and remove. Adjust
the shield’s tension by simply bending
the metal until it achieves the proper
shape to apply the correct pressure.
8. Reinstall the top heat shield removed in step 2 –tighten the mounting screws (see Photo 30).

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Tucson DX/ST Model 8702

9. Installing the top stones. Refer to Photos 33 35 when installing the top stones and stonebrackets.
Rear Retaining Bracket

ScrewsBossesFront Retaining Bracket
Photo 34

Photo 33

14. The brackets should hold the stones securely
and prevent any shifting. Lift the completedassembly and carefully set it back on the Tucson
body.

10. With the top outer surface facing down, locate
and place the center top stone in position
between the bosses and in the center of the top
with the beveled edges and polished surface
facing down.
11. Locate and place the 2 outer top stones facedown between the side bosses. Place the sidestones tightly against the center stone tominimize spaces at the seams.
12. Using 2 retaining screws, mount the Front Stone
Retaining Bracket.
13. Using 4 retaining screws, mount the Rear Stone
Retaining Bracket.

Photo 35

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Tucson DX/ST Model 8702

Lighting & Operation
WARNING: IF YOU DO NOT FOLLOW THESE
INSTRUCTIONSEXACTLY,A
FIRE
OREXPLOSION MAY RESULT CAUSING PROPERTYDAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

Using the Remote:
The Remote and Receiver must be synchronized
before initial use, and after every battery change (forinstructions, see page 39).

CAUTION: LIGHTING THE TUCSON FOR THE
FIRST TIME AND ADJUSTMENTS TO THE UNITSHOULD BE PERFORMED BY QUALIFIEDSERVICE PERSONNEL.

Smoke and Fumes Warning
When lit for the first time, the Tucson will emit somesmoke and fumes. This is normal “off-gassing” ofthe paints and oils used in the manufacturing andassembly of the unit. Open windows to vent theroom if necessary. The off gassing and fumes willsubside after the first 10 to 20 minutes of operation.

Lighting Instructions
Use a gas sniffer device or smell all around theappliance area for gas. Be sure to check next to thefloor because some gases are heavier than air(propane). If you do not detect or smell gas, proceedwith the lighting procedure. If you do detect or smellgas, DO NOT proceed with the lighting procedure.
Instead, immediately refer to the What To Do If
You Smell Gas Warning, on the cover of thismanual.

Odors and Impurities
A heater of this type may produce odors during
heater operation at any time due to impurities that
may exist in the immediate area around the unit.
Sources of impurities can be cleaning solvents, paintsolvents, cigarettes, candles, smoke, pet hair, dust,
adhesives, new carpet, and/or textiles. Such odors
will eventually dissipate. However, opening awindow or otherwise providing additional ventilation
to the area can alleviate the condition sooner. If any
odor persists, find and remove the cause, or contact
your dealer or an authorized service technician.

Pilot Light Warning
Do not attempt to light the unit with a match or by
any means other than the ignition system suppliedwith the unit.

To Light the Stove:

Initial Adjustments

For the Tucson ST: plug the AC/DC powertransformer into the nearest 120V electrical outlet
and/or install batteries in the battery holder.
1. Open the gas supply to the valve.
2. On the control panel, switch the
ON/OFF/T’’STAT switch to the ON position.
3. Switch the pilot to CPI mode and turn up theregulator on the valve.
The control system will beep several times whenlighting the unit for the first time until all air in the gasline is purged. The pilot will ignite automaticallywhen the air is purged. The main burner should
ignite seconds later.

Once the Tucson is set in place, connected andassembled as described in the Clearances To
Combustibles,
Venting
Components&
Configurations, Electrical Connections, and Gas
Supply and Connections sections of this manual, theunit is ready to be lit and adjusted to its particularinstallation. Hearthstone tests each unit prior to
shipment, so ignition should take place without
failure. However, a number of small adjustments
may be necessary to compensate for variations in
gas pressure, altitude, and other factors particular toeach installation.

For the Tucson DX: connect the power cord fromthe Fan Control Module to the nearest 120V
electrical outlet.
1. Open the gas supply to the valve.
2. Slide the ON/ REMOTE/OFF switch to the
ON position.
3. Switch the pilot to CPI mode
The control system will beep several times whenlighting the unit for the first time until all air in the gasline is purged. The pilot will ignite automaticallywhen the air is purged. The main burner should
ignite seconds later.

Pilot Adjustment
The pilot light is preset by the manufacturer andshould not need adjustment. The pilot light flame
should be large enough to engulf the sensor (refer toFigure 17) and to reach the light off ports on theburner but not so large as to create excessive noiseor consume excessive gas. However, it can be
adjusted by means of the pilot light adjustment
screw located on the gas control valve. Controlling
the Tucson by a remote or wall-mounted thermostat
may become erratic, nonexistent, or the unit may go

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

out, if the pilot flame is too small or misdirected awayfrom the thermopile.

2. If the flame is dirty, sooty or licks the top of
the baffle, the air shutter may be closed too
far.
Some conditions cannot be corrected through air
shutter adjustment; an adjustment must be made to
the gas supply pressure or by changing the
restriction plate setting. Qualified service personnel
must perform supply line/manifold gas line pressureadjustments and restrictor plate adjustments. Do not
attempt to complete any part of the installation or
adjustment of this unit unless technically qualified.

Air Shutter Adjustments
WARNING: THE ADJUSTING ROD IS HOT!
WARNING: THE AIR SHUTTER IS FACTORY SETAND ONLY A QUALIFIED GAS TECHNICIANSHOULD MAKE ADJUSTMENTS.

Figure 17: Pilot Flame Pattern

The air shutter is adjustable while the stove isburning. Loosen the set screw on the adjusting rod
located in the lower rear center of the stove. Movethe rod in or out to adjust the flame pattern. See
Photos 36 and 37. Push the rod in to open the air
shutter, and pull it out to close the shutter. Whenthe flame pattern is correct, tighten the set screw
without letting the rod move.

WARNING: THE CONTROL HAS AN INTERLOCK
DEVICE. IF THE STOVE HAS BEEN LIT, IT WILLNOT RELIGHT AGAIN IMMEDIATELY.
AFTER
SHUTTING OFF ALL GAS FLOW, THE PILOTBURNER CANNOT BE RELIT UNTIL THE FLAME
SENSOR HAS COOLED, ALLOWING THE
ELECTROMAGNET TO BE RELEASED (APPROX.
60 SEC.).

Air Shutter
The air shutter is used to regulate the air-to-gas
combustion mixture, which in turn influences the sizeand color of the flames. The air shutter is factory
positioned in the general location needed for testing
the unit with natural gas (NG) and minimum venting.
However, if the unit is not burning as well as itshould in your installation, then the air shutter may
need adjusting.
To determine if the air shutter needs adjustment, it isnecessary to view the flame pattern with the burner
output set at its highest setting. Allow the unit tooperate for at least 10 minutes to allow the entire
unit to reach temperature, and for the flame pattern
to stabilize. Generally, the more air (open shutter) in
the mixture, the bluer the flame. Less air (closed
shutter) results in a more yellow flame, but too little
air will result in incomplete combustion, lowefficiency and a dirty burn. There are two simple
guidelines to aid in determining the correct flame
pattern:

Photo 36 – Air Shutter Closed

1. If the flame just above the surface of theburner or at the base of the logs iscompletely blue, the air shutter may be open
too far;Photo 37 – Air Shutter Opened

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Tucson DX/ST Model 8702

Note: Very little movement is needed to substantiallychange the burn and flame patterns. Someconditions cannot be corrected through air shutter
adjustment; an adjustment must be made to the gas
supply pressure. Supply line/manifold gas linepressure adjustments must be performed byqualified service personnel. Do not attempt tocomplete any part of the installation or adjustment of
this unit unless technically qualified to do so.

ON/OFF/T’STAT
switch(STmodel),
ON/REMOTE/OFF switch on the Receiver (DXModel) or by the Remote Control (DX model).
For the ST model: simply slide the switch to the ON
position to automatically light the burner and enjoy
the heat from the unit. Slide the switch to ‘T’Stat’ tocontrol your stove with an optional wall thermostat,or remote thermostat.
Manually adjust the flame height on the variable
output control located on the gas control valve; youcan vary the rate of heat output to meet the heating
requirements of the season.

Burner Flame Appearance
Once the unit is lit, observe the flame pattern andadjust as necessary. Also, a periodic visual check of
the burner flame should be performed. The burner
flames can be adjusted by means of the air shutter.
To determine if the burner flame needs adjustment,
it is necessary to view the flame pattern with thevalve output at its highest setting. Allow the unit tooperate for 10 minutes enabling the entire unit toreach temperature and for the flame pattern tostabilize. The flame pattern should be similar to theone shown in Photo 38. There are several guidelines
to aid in determining if the flame pattern is correct:
1. The flame should not be dirty, smoky, sooty, or
lick the top of the stove.
2. The flame should not rise off the pan burner; thisis called “lifting”.
3. Flames should not impinge heavily on the log
set. They should “fit” through the pre-formed
spaces designed in the log set.

Photo 39 – ST Valve Output Control
For the DX model: with the Receiver switch set to‘REMOTE’ you have the option of setting thethermostat on the remote control to the desired room
temperature and the unit will cycle on and off asrequired. Or you can set the switch on the Receiverto ‘ON’ and the burner will light and remain on High
until you turn it off.

Photo 40 – DX Receiver Switch
You can adjust the flame height on the DX via theremote control, or use the ‘Smart’ mode to let thesystem automatically adjust it for you. See theProflame GTMF use and installation instructions
included with the Remote transmitter for detailed
system operation instructions.

Photo 38 – Typical Burner Flame Appearance

Daily Operation
Your Tucson gas-fired heater is easily operated
once installed and adjusted by qualified service
personnel. The unit is controlled via the36

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Tucson DX/ST Model 8702

For both models: During the summer non-heating
season, switch the unit “OFF”, and flip the pilot
switch to Intermittent (IPI). This will improve theoverall efficiency of the unit as the heat from the pilot
is not wasted. When putting the unit back into
service, replace any batteries with fresh ones, andrefer to the lighting instructions on page 34.

continuous condensation on the window glass or
dripping water from any part of the unit or venting
system (chimney) is noted, immediately discontinue
operation of the unit and contact qualified service
personnel.

To Turn off Gas and Shut Down the
Appliance:

Note: the unit will produce odors for a shorttime when lit after a long period of non-use.
A thorough cleaning of the unit to remove
dust will minimize this effect. Open a window
briefly to help quickly dissipate the odors.

1. Close the shut-off in the gas supply tothe valve.
2. Set the thermostat to the “OFF” positionor turn the ON/OFF/T-STAT or
ON/REMOTE/OFF switch to the “OFF”
position.
3. Switch the Pilot mode switch to IPI
mode.

When the unit is first lit, especially when cool, it isnormal to experience some condensation on theinside of the window glass. This condensation willburn off within the first few minutes of operation. If

37Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Routine Maintenance and CareYour Tucson requires minimal routine maintenanceand care. Ensure the unit is cool and off whencleaning, or servicing.

Annually:
Clean Firebox, Pilot, & Burner Assembly

WARNING: DO NOT SUBSTITUTE MATERIALS.

The firebox requires periodic cleaning to prevent theaccumulation of dust, lint, and other debris. To clean
the firebox, set the switch to the “OFF” position, andturn off the gas supply to the valve. When the unit iscool, remove the front panel and glass (see page 15
for Firebox Access instructions) and carefully
remove the decorative ceramic log set, taking care
not to damage the logs or chip the enamel cast iron.
Remove all ember material. Clean the firebox baffle,
ceramic burner, and carefully vacuum the entire
surface of the log set with a soft brush attachment.
Thoroughly vacuum the ports (holes) along the topof the burner, and the pilot assembly.

For replacement parts, or for information about partsor service, contact your local Hearthstone dealer.

Cleaning
WARNING: DO NOT CLEAN THE UNIT WHEN HOT.

The unit should receive regular cleaning on, under,
and around the stove to prevent the buildup of dust
and lint. The exterior surfaces of the unit can becleaned using soap, water, and a soft cloth. Do not
use abrasive or chemical cleaners and take care notto scratch the glass or enamel finish (if so equipped)
when cleaning the unit. The use of chemical wax
based cleaners or polishes are not recommended
due to the potential for discoloration of the castings,
stones or enamel when the residue of the cleanersor polishes is exposed to heat. Excessive buildup ofdust, spider webs, or room air contamination may
cause odors when the stove is hot.

With the decorative ceramic logs out of the firebox,
reseal the firebox and briefly light the unit according
to the lighting instructions described on page 34.
Check to ensure a proper flame is burning from eachburner port. The pilot flame should be burning
properly as shown in Figure 17.
NOTE: Do not operate the unit for more than
1-2 minutes without the log set in place. Turnthe unit off by setting the switch to “OFF”,
and turning off the gas supply to the valve.
Allow the unit to cool.

Monthly:
Glass Cleaning
As fuel gas may contain some impurities; it will benecessary to clean the inside of the glass
occasionally. Do not use abrasive cleaners.
Scratching the glass will weaken the integrity of theglass. Do not clean the glass when hot! Allow theglass to cool and apply a mild window cleaning fluid.
Special gas appliance window cleaner is available
from your local Hearthstone dealer.

Check and clean any burner ports that are notburning, or not burning properly. Clean burner ports
using a soft brush or vacuum cleaner. If the pilot
flame height needs adjustment, it should be adjusted
by qualified service personnel as described on page
34.
Complete the cleaning procedure by carefully
placing the log set within the firebox as described on
page 28. Reattach the glass and front panel to seal
the firebox. Turn on the gas, light the unit and checkfor proper operation. Flame patterns should look
similar to the flames in Photo 38. Regularly check toensure the area around the Tucson is kept free fromcombustible materials, gasoline, and otherflammable vapors and liquids. Check that the flow of
combustion and ventilation air is not obstructed.

WARNING: DO NOT OPERATE THIS APPLIANCE
WITH THE GLASS PANEL REMOVED, CRACKED,
OR BROKEN. DO NOT SUBJECT THE GLASS ORITS FRAME TO ABUSE, SUCH AS STRIKING OR
BENDING. REPLACEMENT OF THE GLASSPANEL SHOULD BE DONE BY A LICENSED ORQUALIFIED SERVICE PERSON.

NOTE: If the venting system is disassembled for any
reason, re-install per the instructions provided in theventing section of this manual.

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Battery Replacement

Professional Inspection

WARNING: DISCONNECT POWER TO THE UNIT
AND SHUT OFF THE GAS SUPPLY TO THEVALVE BEFORE REPLACING ANY BATTERIES.

Once a year, have the unit, and venting systeminspected by qualified service personnel to ensurethat they are clean, free of obstruction, safe, and ingood working order. If service or maintenance isrequired, have qualified service personnel perform it.

Hearthstone recommends replacing all batteries atleast every season. Keep a supply of good quality
rechargeable batteries on hand to ensure
functionality during power outages, and to give theenvironment a break.

As Needed:
Glass and Gasket Replacement

Remote Transmitter Battery Replacement

In the event that you need to repair or replace acracked or broken glass or gasketing use thefollowing instructions to replace the components. Fora broken glass ask for kit #97-58710 from your
Authorized Hearthstone Dealer. Your Tucson uses afolded flat fiberglass gasket to make a tight seal
between the glass frame and the firebox. In time, thegasket can become brittle and compressed andshould be replaced. New gasket material is alsoavailable from your Authorized Hearthstone Dealer.
Protect your hands with work gloves, and wash up
later.

You can easily change the Remote Transmitter
batteries by accessing the rear cover plate. Ensure
you orient the batteries correctly as indicated in thebattery compartment.
Receiver Battery Replacement
1. Move the switch to the OFF position. Remove
the cover plate screws and pry the entire platewith the switch off the receiver’s battery
compartment.
2. Install four new AA batteries. Ensure you orient
the batteries correctly as indicated on the battery
compartment cover.
3. Ensure the switch is still in the OFF position,align the slider with switch stem and snap thecover plate back onto the battery compartment.
4. Replace the cover plate screws.

1. Allow the Tucson to cool completely. Remove
the glass from the glass frame by drilling out thefour 1/8” rivets that lock the glass in place. Pull
the glass away from the frame and set it aside.
2. Remove the existing gasket from the glass bygrasping one end and pulling firmly. Clean off asmuch of the hanging fiber “hairs” as possible

Initializing the Remote Control
Whenever you replace the batteries, you must
synchronize communication between the Receiverand the Remote Control transmitter.
1. Place the slider switch in the REMOTE position.
2. Insert the end of a paper clip into the holemarked PRG on the Receiver cover. The
Receiver will beep three times to indicate it isready to synchronize with the Remote Control.
3. Install three AAA batteries in the Remote
Control, and push the ON button. The Receiverwill beep four times to indicate the Remote’scommand is accepted and is set to the particularcode of that Remote. The system is now
initialized.

3. Locate the 1” x1/8” flat tape gasket. Peel theadhesive protecting paper away from one end.
Starting at the center of the long end of the glass
apply the gasket centered on the edge of theglass. Continue to wrap the gasket around theedge until you meet at the starting point. Do not
overlap the gasket ends or leave ends withragged edges.
4. Firmly and evenly, fold the gasket around theedges of the glass so it lies flat on the surface.
5. Place the gasket back in the glass frame. With
four new 1/8” rivets replace the 2 glass clips.
The glass and frame are now ready to be placedback on the unit.

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Tucson DX/ST Model 8702

Parts List
Part #
17YY-355
17YY-360
17YY-362
27XX-100
27XX-200
27XX-300
27XX-350
27XX-400
27XX-500
27XX-486
3120-150
3160-150
3160-105
3160-152
3160-106
3160-107
3160-081
3160-155
3160-157
3170-150
5710-200
5710-015
5710-220
5710-230
5710-240
5710-279
5710-211
5710-226
5710-227
5710-277
5710-222

Description
Side Stone
Top Center Stone
Top Outside Stone
Foot
Control Door
Left Side
Right Side
Front
Top
Heat Exchanger
Heat Wave Baffle
Heat Exchanger Gasket
Delayed Ignition Relief Gasket
Pilot Gasket
Venturi Tube Gasket
Rear Orifice Plate Gasket¾”x 1/8” Gasket Tape
Gasket 4”, Inlet
Gasket 6”, Exhaust
Platinum Bright Embers
FireboxVenturi Tube
Base Plate
Glass Frame
Stone Support Panel
Glass Handle, Spring Hook
DFC Board Mounting Plate
Modesty Panel (ST)Modesty Panel (DX)
Pilot Shield
Control Door Hinge, Right

Part #
5710-224
7000-104
7000-394
7000-393
7200-241
7200-253
7211-588
7211-590
7211-591
7211-592
7211-593
7211-594
7211-395
7211-163
7211-136
7211-340
7211-344
7211-100
7211-110
7211-101
7211-104
7211-102
7211-103
7211-105
7211-404
7211-517
97-58710
97-57100
97-56100
97-56104
97-56102
97-56105

Description
Control Door Hinge, Left
Battery Holder (ST)Remote Control Receiver (DX)Remote Control Transmitter (DX)NG Burner Orifice #41
LP Burner Orifice #53
Ember Burner
Log 1, Rear
Log 2, Center BaseLog 3, Right Lower
Log 4, Right Top
Log 5, Left Top
IPI (NG)Pilot Burner Assembly
NG Pilot Orifice .62mm
LP Pilot Orifice .35mm
LP Regulator Manual (ST)LP Regulator Stepper (DX)NG Valve, Manual (ST)NG Valve, Stepper (DX)DFC Board
Power Adapter (ST)DFC Wire Harness
GTMF Wire Harness (DX)Fan Control Module (DX)
Knob extension, 1” (ST)Charcoal embers 4oz
Glass Assembly
Replacement Blower Kit
LP Conversion Kit Manual (ST)LP Conversion Kit Stepper (DX)NG Conversion Kit Manual (ST)NG Conversion Kit Stepper (DX)Key:
XX = Finish (e.g. 10 = Matte Black Paint) – Specify finish required when ordering parts
YY = Stone Type (e.g. 41 = Polished Grey Soapstone)
WARNING: DO NOT SUBSTITUTE MATERIALS. FOR REPLACEMENT PARTS, OR FOR INFORMATION ABOUTPARTS OR SERVICE, CONTACT YOUR AUTHORIZED HEARTHSTONE RETAILER.
For the name of the authorized retailer nearest to you, visit our website www.hearthstonestoves.com or write:

Hearthstone Quality Home Heating Products, Inc.
317 Stafford Ave.
Morrisville, Vermont 05661-8695

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Tucson DX/ST Model 8702

Troubleshooting
Symptom

Possible Cause

Corrective Action

1. Pilot will not light.

A. Power supply not plugged in
and/or batteries are dead.

A. Ensure power supply is plugged in and receiving 120V
AC. Ensure power supply output is 6V DC. Replace allbatteries with known good batteries.

B. Insufficient gas pressure, air in
the pilot line, or dirty or kinked gas B. Allow time for system to purge air in line. Check the inlet
line.
gas pressure. Make sure it is within the Min/Max. allowablepressures.
C. Pilot orifice plugged.
C. Clean or replace the pilot assembly.
D. Defective or misaligned
electrode in pilot assembly.
D. If a flame lights the pilot, check the electrode gap andlocation. The gap should be 1/8" in the flame area.
E. Defective ignitor.
E. Check for a good connection between ignitor and
F. After sitting for "off" season
electrode. Check wire insulation. If everything is properly(summer), pilot assembly may be connected and still no spark, replace the DFC Ignition
dirty.
Module.
F. Clean or replace the pilot assembly.
2. Pilot in CPI mode but
A. Low or too high gas pressure
will not stay lit after
carefully following lighting B. Faulty connections.
instructions.
C. Pilot dirty or plugged.

3. Pilot burning, no gas tomain burner,
ON/OFF/T'STAT or
ON/REMOTE/OFF switch
in the "ON" position.

A. Check for proper inlet pressure for the fuel gas in use.
B. Check connections on the valve.
C. Clean or replace the pilot assembly.

A. Switch, Thermostat, Receiver,
DFC Ignition Module, or wires
defective.

A. Check wiring for proper connections. Check components
for proper operation. Place jumper wire across terminals atthermostat if present. If burner comes on, replace defective
thermostat. If not OK, place jumper across thermostat wires
B. No power and batteries may be at gas valve. If burner comes on, tighten connections, ordead.
replace faulty wires.
C. Plugged burner orifice.

4. Pilot and burner come A.
on, but go out after somewarm-up.

Inconsistent or insufficient
flame on flame rectification
sensor.

B.

Insufficient gas pressure.

C.

Excessive draft.

B. Restore 120V service. Check for proper output of FCM, or
AC adaptor – replace unit if defective. Replace batteries toignition system and/or remote receiver.
C. Remove and check burner orifice - clean or replace. Note:
do not use any metal cleaning device, as this may damage
the orifice.
A. Adjust pilot flame size and assure that the flame is aimed
directly at the rectification sensor.
B. Check line pressure to ensure that the correct inlet
pressure is present for the type of gas being used. If propane
pressure is inconsistent, check for water condensation at theregulator.
C. Check Restriction settings per this manual.

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Tucson DX/ST Model 8702

Symptom

Possible Cause

Corrective Action

5. Frequent pilot outage
problem in CPI mode.

A. Pilot flame may be too low or
blowing, (high), causing the pilot
safety to drop out.

A. Clean and/or adjust the pilot flame for maximum
impingement on the rectification sensor.
B. Check Restriction settings per this manual.

B. Excessive draft
6. Glass fogs

A. A normal result of gas
combustion in a cold stove.

A1. After the heater has warmed up, the glass should clear.
A2. Leave pilot in CPI mode to keep stove warmer.

7. Blue Flames

A. A normal result during the first
20 minutes.

A. Flames should begin to turn more yellowish after 20
minutes of burning.
B. If the blue color stays; adjust the air shutter for a properburn.

8. Floating flames, lazy ill- A. Potentially dangerous
defined, quiet flames,
incomplete combustion due towhich roll around,incorrect air to fuel ratio (lack ofsometimes completely off combustion air or excessive fuelof the port, sometimes
delivery I.e. excessive gas
with overly, yellow tips.
pressure, overrating of appliance).
Possible sooting. Usuallyaccompanied by the odor B. Incorrect air intake/exhaust flowof aldehydes.
system. Causes may be:
B1. Blocked burner.
B2. Blocked primary air
B3. Blocked secondary air inlets

A. Check the appliance input rate and reduce if necessary.
The air intake/exhaust flow system may be too restrictive or
blocked (the rate at which the exhaust leaves [draft]determines the rate at which the combustion air is delivered).
Poor draft results in insufficient air delivery or a restrictedexhaust. Correct air intake/exhaust flow system.
B1. Clear ports.
B2. Clear obstructions.
B3. Clear obstructions.
C. If gas pressures are correct and the flames stay the same,
adjust the air shutter for a proper burn.

C. Incorrect air shutter position.
9. Burner flashback. Air- A. Excessive primary air.
gas mixture ignites inside
the burner near the orifice, B. Burner input underrated.
usually creating a roaring
noise like a blowtorch. The C. Valve leak if flashback occurs
problem is an imbalance with burner valve in off position.
of gas flow velocity andburning speed pattern.
D. Improper gas pipe size.

A. Adjust the air shutter for a proper burn.
B. Check input rate. Check input pressure using a
manometer. Confirm correct gas pressure at house meter ortank (call gas company). Confirm burner orifice size.
C. Replace valve. If above corrections do not eliminate
flashback, replace burner.
D. Correct plumbing.

10. Delayed ignition(makes a sudden"whoosh" noise as theburner lights). This is abuildup of gas prior toignition. This is moreprevalent with propane(LP) fuel.

A. Incorrect air-to-fuel ratio.
A1. Primary air incorrect.
A2. Burner ports plugged.

A1. Adjust the air shutter for a proper burn.
A2. Open ports to allow for proper travel of flames.
B. Reposition logs to eliminate interference with flame travel.
C. Ensure the pilot shield is installed in the proper position.

B. Improper log placement.
C. Pilot shield not installed
properly.

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Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

Rating LabelMOD EL #87 02-SERIAL #MODEL NAME: TUC SON DIRECT V ENT GAS FIR ED HEATER
LISTED: GAS FIRED DIRECT VENT HEATERTES TED TO: ANSI Z21.88b -2005/CSA 2.33b-2005
CGA-2.1 7-M9 1 CSA P.4.1-02

CER TIFIED FOR AND US CANADAHOMOLOGU E POUR L E CANADAALS O FOR M OBILE HOME INSTALL ATIONC AUTIO N: D O NO T OPE RATE WITH GL AS S REMOVED , CRA CKED, OR BROK EN.
Replac emen t on the panel sho uld be done by a l icense d or q ualifie d se rv ice pe rson.
C AUTIO NNE R: N’o père l’appareil avec le verra enlève, craque ou c asse. Le
re mplaceme nt du p anne au dev rait êt re fait par une personne de service qualifi é ou autoris é.

FUEL TYPE:INPUT RATING (Btu/hr) 0-2000 ft
INPUT RATING (Btu/hr) 2000-4000FTORIFICE SIZE (DMS) 0-2000 ft
ORIFICE SIZE (DMS) 2000-4000 ft
MANIFOLD PRES SURE - LO (in. w.c./kpa)
MANIFOLD PRES SURE - HI (in. W.c./kpa)
MINIMUM INLET PRESSURE (in. W.c./kpa)
MINIMUM INPUT (btu/hr) 0/2000 ft
MAX IMUM OUTPUT (btu/hr) 0-2000 ft

LPNG
25,00025,0 00
24,2 00
24,2004153
54
42
1.6/0.40 6 .4/1 .59
3.5/0.87 1 0.0/2 .48
5. 0/1.2 5 12/2 .99
18,00021,6 00
19,1 00
17,350This appliance m ust be installed in ac cordance with the local codes, ifany, if not; follow the N ational Fuel Gas Code, ANSI Z 223.1 or
Canadian Installa tion C odes , CSA B149. 1. (Ins taller l 'appa reil selon lescode s ou r églements locaux , ou, en l'a bs ence de tels réglements , selon les C odes
d'inst allation CSA -B149.1)
WARNING: Improper installation, adjust ment, alteration, s ervice ormaintenance can caus e injury or p ropert y damage. Ref er t o theowne r's inf ormat ion manual provid ed wit h this appliance. For
assis tance or ad ditional infor mation consult a qualifie d inst aller, s ervice
agenc y or the gas supplier. ( L'AV ER TISSEMENT: L' ins tallation
inconvena nte, aj ustement, modification, s ervice ou entretien peutcaus er le d ommages de propriété ou ble ssure. Référer au manueld'informati on de propriétaire fourni cet ap pareil. Pour l'assista nce ou
infor mation supp lémentaire consult e un qua lifié e inst alleur, agence deservi ce ou le fournisseur de gaz.)

MINIMUM CLEARANCES TO COMBUSTIBL ESU NIT TO REAR WALLU NIT TO SIDE WALLSC ORNER2” / 51 mm
6” / 15 3 mm
4” / 102 mm

This appliance is only for us e wi th the typ e of g as in dicated o n this rating p late and may b e ins talle d in a n aftermarket,
permanently located, m anu factured (mob ile) home where no t pro hibited by loca l cod es. See o wner’s m anual for details. Thisapp liance is not convertible for use w ith other g ase s, un less a certified kit is used. If the ve nt air intake s ystem is
dis assemble d for any reason, re install per the instructions pr ovided with the initi al ins truct ions. This vent ed ga s fireplac eheater is not for use w ith air filte rs. Th is ap pliance m ust b e properly co nnected to a venting sys tem in ac cord ance with thema nufa cturer’s in stallation instructions.
VENTED GAS FIREPLACE HEATER - NO T FO R USE WITH SOLID FU EL.
MANUFACTURED BY: HearthStone, MORRISVILLE, VERMONT 05661

2009

2010

2011

Jan

Feb

Mar

Date of Manufactu re
Ap r
May
Jun

Jul

MAD E IN USA

DO NOT REMOVE OR COV ER THIS LABEL

43

Aug

Sep

Oct

Nov

Dec

3300- 540

Hearthstone Quality Home Heating Products, Inc.

Tucson DX/ST Model 8702

WARRANTY REGISTRATIONThe Original Purchaser can complete their warranty registration on our website at www.hearthstonestoves.com,
or send a completed and signed Warranty Registration Form, which is enclosed in the Gas Stove warranty
packet, to the following address:
Hearthstone Quality Home Heating Products, Inc.
Warranty Department
317 Stafford Avenue
Morrisville, VT 05661
NOTE: SENDING IN THE SIGNED WARRANTY REGISTRATION FORM IS NOT REQUIRED AS A
CONDITION OF WARRANTY COVERAGE OR HEARTHSTONE’S PERFORMANCE.

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