Type F21100

Tube Furnace

OPERATION MANUAL

AND PARTS LIST

SERIES 1029

Model # Voltage Control

F21124 100 Manual

F21125 120 Manual

F21120 240 Manual

F21130 240 Single Set Point

F21130-33 230 Single Set Point

F21135 120 Single Set Point

BARNSTEAD|THERMOLYNE CORPORATION

LT1029X1T • 3/7/97
2

Table of Contents

Safety Information ................................................................................................................................3 

Alert Boxes ............................................................................................................................................3 

Warnings ................................................................................................................................................4 

Introduction ............................................................................................................................................5 

Intended Use......................................................................................................................................5 

General Usage ..................................................................................................................................5 

Principles of Operation ......................................................................................................................5 

General Specifications for Furnaces ......................................................................................................8 

Environmental Conditions ..................................................................................................................8 

Declaration of Conformity ......................................................................................................................9 

Unpacking ............................................................................................................................................10 

Installation ............................................................................................................................................11 

Operation of Manual and Automatic Models ........................................................................................12 

Manual Control Models (F21124, F21125, F21120) ............................................................................12 

Pyrometer ........................................................................................................................................12 

Single Set Point Temperature Control (Automatic) (F21130, F21130-33, F21135)..............................13 

Adjustment of Parameters (See Figure 1) ......................................................................................13 

Furnace Loading ..................................................................................................................................16 

Preventive Maintenance ......................................................................................................................17 

General Cleaning Instructions..........................................................................................................17 

Troubleshooting....................................................................................................................................18 

Maintenance and Servicing..................................................................................................................21 

To Replace Vestibule End Caps ......................................................................................................21 

To Replace The Heating Element Tube (Without Case Assembly) ................................................21 

To Replace Control Base ................................................................................................................22 

To Replace Pyrometer (Manual Control Models) ............................................................................22 

To Replace Manual Temperature Control Switch ............................................................................23 

To Replace Furnace Chamber ........................................................................................................24 

To Replace Type K (Chromel/Alumel) Thermocouple (Manual Control Models) ............................24

To Replace Type Platinel II Thermocouple (Single Set Point Control Models) ..............................25 

Replacement Parts List ........................................................................................................................26 

Ordering Procedures ............................................................................................................................27

Wiring Diagrams ..................................................................................................................................28 

Warranty ..............................................................................................................................................30 

Table Of Contents
3

Safety Information

Your Thermolyne Tube Furnace has been designed with

function, reliability, and safety in mind. It is your responsibility to install it in conformance with local electrical

codes. For safe operation, please pay attention to the

alert boxes throughout the manual.

WARNING

To avoid electrical shock, this furnace must:

1. Use a properly grounded electrical outlet of correct

voltage and current handling capacity.

2. Disconnect from the power supply prior to maintenance and servicing.

3. Always use a properly sized combustion tube.

To avoid personal injury:

1. Do not use in the presence of flammable or combustible materials ; fire or explosion may result. This

device contains components which may ignite such

material.

2. Refer servicing to qualified personnel.

HOT SURFACE

“Caution: Hot Surface. Avoid Contact.” To avoid burns,

do not touch this furnace on the exterior or interior surfaces during use or for a period of time after use.

Alert Boxes

WARNING

Warnings alert you to a possibility of personal injury.

HOT SURFACE

Hot surfaces alert you to a possibility of personal

injury if you come in contact with a surface during

use or for a period of time after use.

CAUTION

Cautions alert you to a possibility of damage to

the equipment.

NOTE

Notes alert you to pertinent facts and conditions.

General Information
4

Please note the following warnings:

WARNING

This warning is presented for compliance with California Proposition 65 and other regulatory agencies and

only applies to the insulation in this product. This product contains refractory ceramic, refractory ceramic fiber

or fiberglass insulation, which can produce respirable dust or fibers during disassembly. Dust or fibers can

cause irritation and can aggravate pre-existing respiratory diseases. Refractory ceramic and refractory ceramic fibers (after reaching 1000°C) contain crystalline silica, which can cause lung damage (silicosis). The International Agency for Research on Cancer (IARC) has classified refractory ceramic fiber and fiberglass as possibly carcinogenic (Group 2B), and crystalline silica as carcinogenic to humans (Group 1).

The insulating materials can be located in the door, the hearth collar, in the chamber of the product or under

the hot plate top. Tests performed by the manufacturer indicate that there is no risk of exposure to dust or respirable fibers resulting from operation of this product under normal conditions. However, there may be a risk of

exposure to respirable dust or fibers when repairing or maintaining the insulating materials, or when otherwise

disturbing them in a manner which causes release of dust or fibers. By using proper handling procedures and

protective equipment you can work safely with these insulating materials and minimize any exposure. Refer to

the appropriate Material Safety Data Sheets (MSDS) for information regarding proper handling and recommended protective equipment. For additional MSDS copies, or additional information concerning the handling

of refractory ceramic products, please contact the Customer Service Department at Barnstead|Thermolyne

Corporation at 1-800-553-0039.

1-800-446-6060

1-800-553-0039

Warning
5

Introduction

Intended Use

The type 21100 furnaces are small, inexpensive furnaces ideally suited for school, chemical and industrial

laboratories. They are intended for applications requiring

temperatures up to 1100°C for manual control bases or

temperatures up to 1200°C for the electronic single set

point control bases. See specification sheet for continuous and intermittent operating temperatures.

General Usage

Do not use this product for anything other than its intended usage.

Principles of Operation

The furnace chamber is heated by heating elements embedded in a refractory material. The tubular chamber is

insulated with a ceramic fiber insulation. The furnace

chamber is supported by the control base which also

houses the electrical connections. Two types of controls

are used:

1. Manual Control - A percentage input control which

compensates for line voltage fluctuation and ambient

temperature changes. The temperature is measured by

a thermocouple and is displayed on a pyrometer.

2. Single Set Point Control - An electronic control

which enables the user to bring the furnace up to a preset temperature and hold the temperature. (See Figure

1)

Introduction

Figure 1 Single Set Point Control
6

Furnace Chamber 

Pyrometer 

Cycle Light 

Power Light 

Control Switch 

Type F21100 Furnace 

(Manual Control Model)

Furnace Chamber 

Electronic Control

Type F21100 Furnace 

(Single Set Point Control Model)

INTRODUCTION
7

THERMOCOUPLE ELEMENT

LEAD WIRE

WHITE

YELLOW +

RED

THERMOCOUPLE

LEAD WIRE

POWER CORD

BLACK

GROUND WIRE

(GREEN)

ELEMENT 

LEAD WIRE

Figure 2a (All Models except F21130-33)

Figure 2b (Model F21130-33)

INTRODUCTION
8

Environmental Conditions 

Operating: 17°C - 27°C; 20% to 80% relative humidity,

non-condensing. Installation Category II 

(over-voltage) in accordance with IEC 664. Pollution Degree 2 in accordance with IEC 664. 

Altitude limit: 2,000 meters.

Storage: -25°C to 65°C; 10% to 85% relative humidity.

General Specifications

Model Number F21135, *F21125 F21130, *F21120 *F21124 F21130-33

Dimensions - In.

(cm)

Overall Width 16 (40.6) 16 (40.6) 16 (40.6) 16 (40.6)

Height 14.63, *14.75 14.63, *14.75 14.63, *14.75 14.63, *14.75

(37.2, *37.5) (37.2, *37.5) (37.2, *37.5) (37.2, *37.5)

Chamber Width 12 (30.5) 12 (30.5) 12 (30.5) 12 (30.5)

Height 1.0 & 2.0 Dia. 1.0 & 2.0 Dia. 1.0 & 2.0 Dia. 1.0 & 2.0 Dia.

(2.5 & 5) (2.5 & 5) (2.5 & 5) (2.5 & 5)

Weight - lbs (Kg) 19 lbs 5 oz (8.8) 19 lbs 5 oz (8.8) 19 lbs 5 oz (8.8) 19 lbs 5 oz (8.8)

*19 lbs 12 oz (9.0) *19 lbs 12 oz (9.0) *19 lbs 12 oz (9.0) *19 lbs 12 oz (9.0)

Electrical Ratings

Volts 120 240 100 230

Amps 11.25 5.6 13.5 5.4

Watts 1350 1350 1350 1240

Freq. 50/60 50/60 50/60 50/60

Phase 1 1 1 1

Temperature 100 - 1200°C 100 - 1200°C 100 - 1200°C 100 - 1200°C

Ratings °C *371 - 1100°C *371 - 1100°C *371 - 1100°C *371 - 1100°C

* For models with manual control.

Temperatures specified, obtained with both 1.0” Dia. and 2.0” Dia. ceramic process tubes, 17” long.
9

Declaration of Conformity (-33

models only)

Barnstead|Thermolyne hereby declares under its sole responsibility that this product conforms with the technical

requirements of the following standards:

EMC: EN 50081-1 Generic Emission Standard; EN

50082-1 Generic Immunity Standard;

Safety: IEC 1010-1-92 Safety requirements for electrical 

equipment for measurement, 

control, and laboratory use; Part I: General Requirements

IEC 1010-2-010 Part II: Particular requirements for

laboratory equipment for the heating of 

materials

per the provisions of the Electromagnetic Compatability

Directive 89/336/EEC, as amended by 92/31/EEC and

93/68/EEC, and per the provisions of the Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC.

The authorized representative located within the European

Community is:

European Manager

Barnstead|Thermolyne

Saarbrückener Str. 248

D-38116 Braunschweig

Germany

Copies of the Declaration of Conformity are available upon

request.

Declaration of Conformity
10

Unpacking

Unpack furnace from box and remove packing material

from inside furnace chamber. The furnace is supplied

with a three wire cord and plug & 2-JC211x1 (1") diameter tube mounting vestibules. Furnace does not contain

a refractory process tube.

NOTE

Contact the dealer from which your furnace was

purchased to obtain proper process tube and

information regarding its use.

Unpacking
11

Installation

SITE SELECTION: Install furnace on a sturdy surface and

allow space for ventilation.

The electrical specifications are located on the specification

plate on the back of the furnace. Consult Barnstead/Thermolyne if your electrical service is different than those listed on the specification plate. Prior to connecting your Type

21100 furnace to your electrical supply, be sure the power

or control switch is in the OFF position.

Installation

CAUTION

Be sure ambient temperature does not exceed

104°F (40°C); ambients above this level may

result in damage to the control.

Allow at least six inches of space between the

furnace and any combustible surface. This permits the heat from the furnace case to escape

so as not to create a possible fire hazard.

NOTE

Furnace comes with both 1" and 2" dia. end

caps. Install the end cap which fits the tube you

plan to use.

WARNING

To avoid electrical shock, this furnace must be

installed by a competent, qualified electrician

who insures compatibility among furnace specification, power source and ground code

requirements.
12

Operation of Manual and 

Automatic Models

Observe These Warnings Before Operating

Your Furnace:

Manual Control Models

(F21124, F21125, F21120)

The control switch is a combination ON/OFF switch and

temperature control. The furnace is ON at any setting of

the control switch except in the OFF position. The green

power light will be illuminated as long as power is

applied. Turn the control switch counterclockwise to set

rate of heating.

Cycle Light: The amber cycle light will illuminate whenever the power is being applied to the elements.

Power Light: The green power light will illuminate whenever the control switch is turned to a setting other than

the OFF position.

The marks on the control indicate the percent of time

power is applied to the heating elements. An increase in

percent time “On” results in a higher chamber temperature. Adjust control switch to maintain desired temperature setting. To turn the furnace off, turn control either

fully clockwise or fully counterclockwise to the OFF position.

Pyrometer

The pyrometer with a thermocouple indicates the chamber temperature. It does not control the furnace in any

manner. It is provided to enable the operator to observe

the temperature within the chamber.

Operation

WARNING

Do not use in the presence of flammable or

combustible chemicals. Fire or explosion may

result; this device contains components which

may ignite such materials.

HOT SURFACE

“Caution: Hot Surface. Avoid Contact.” To avoid

burns, do not touch this furnace on the exterior

or interior surfaces during use or for a period of

time after use.

CAUTION

Monitor furnace if percent time input is set

greater than 40% on and particularly when the

control is set on “HI” or in the red zone. The furnace may overheat and burn out the elements

or thermocouple if not properly monitored under

these conditions.
13

Single Set Point Temperature Control (Automatic) (F21130,

F21130-33, F21135)

This furnace control consists of a microprocessor based

three-mode (Proportional, Integral, Derivative), single set

point temperature control. The control features programmable overtemperature protection and thermocouple break

protection. 

Power Switch: Switch power switch to the “ON” position.

The switch will illuminate when power is on.

Cycle Indicator: The amber “OP” cycle light will illuminate

whenever the power is being applied to the heating elements. (See Figure 1).

Digital Readout 

The digital readout continuously displays chamber (upper

display) and set point (lower display) temperatures unless

the PAR (parameter) button is depressed.

Initial Startup:

When the power switch is turned on, the control will perform a self-test to make sure control is operating properly.

(If all four 1’s do not light up or fail to go to “8888,” contact

Thermolyne.)

Adjustment of Parameters (See Figure 1)

To Illuminate “up,” “down,” and “scroll” buttons, touch anywhere on front panel. See Figure 1 “Secret Key.”

Set Point Temperature

Push “up” or “down” button to modify temperature set point

(lower digital display).

Temperature Indication

Push scroll button once. “°C” will appear. This indicates

temperature measurement. (Contact Thermolyne if control

needs to be changed to °F.)

Ramp to Set point Operation — SP.rr

The set point ramp rate is designed to allow a user to reduce the heat-up rate or cooling rate that the furnace normally exhibits. When not using this feature, the furnace will

operate at its maximum heat-up rate and cool down capability.

NOTE

The temperature control in this automatic models

is a single set-point device. By using the “up” or

“down” push buttons, a specific temperature can

be chosen. The control will cause the furnace

chamber to heat to the chosen temperature and

hold it at this temperature until you turn off the

power switch or select another temperature.

NOTE

When performing the following steps remember

that if more than eight to ten seconds elapse

before the buttons are used again, the display

screen will automatically switch back to displaying chamber temperature. If this happens, light

up the front panel again and step through each

parameter until you reach the point at which the

interruption occurred. The parameter values you

checked earlier, however, will not be lost or

altered. Holding down on the scroll button

allows longer viewing time.

OPERATION
14

To access SP.rr set point ramp rate:

1. Push scroll button until AL.SP appears.

2. Push Secret Key to enter protected list.

3. Push scroll button until SP.rr (Set point Ramp

Rate) appears. SP.rr is expressed in °C/min.

If you desire to ramp to the set temperatures at a specified rate, depress “UP” or “DOWN” button to give current

setting of ramp rate, then depress “UP” or “DOWN” button again until you achieve desired setting.

The set point ramping feature is started by setting SP.rr

to any value except OFF. Ramping is initiated only by

one of two conditions:

•Power-up (Upon power-up, ramping always starts from

the current furnace temperature.)

•Change in set point.

If you choose not to use the ramp to set point feature,

set SP.rr to OFF.

CAUTION

Do not change any parameters in the “protected

list” other than SP.rr. Changing other parameters could result in furnace malfunction.

NOTE

Remember when setting SP.rr you must stay

within the heating and cooling capabilities of the

furnace. See specification sheet.

NOTE

SP.rr must be set to Off if Self Tuning is

selected.

Setpoint

Original

Furnace Temp.

Without Ramping

With High SP.rr With Low SP.rr

Without Ramping

With High SP.rr

With Low SP.rr

Change in Setpoint

Power Up

OPERATION
15

Tuning

This control incorporates a self tuning feature which determines the optimum control parameters for the best temperature accuracy. We recommend that you tune the furnace

to your specific application to obtain the best results. Perform the following procedures when you first set up your

furnace and each time you change your load type or operating temperature.

Push scroll button until “tunE” appears. To start tuning function, push “UP” button. To stop tuning function, push

“DOWN” button.

When the tuning process is started, the lower display will

flash “tunE” along with the furnace temperature set point.

During tuning the temperature set point cannot be

changed. To change temperature set point, “tunE” must be

turned off.

Overtemperature Protection

The control is fitted with a solid-state relay which is de-energized in the alarm mode. If the primary control circuit

fails, the OTP will control the furnace temperature at the

preset value you have entered. It does not shut off the furnace but will maintain the chamber temperature at that

value.

To set the OTP value, depress the scroll button until

“AL.SP” (Alarm Set Point) appears. The lower display

should indicate 1210°C. Depress either the “UP” or

“DOWN” push button to select the OTP value you desire.

Thermolyne recommends that you set the value either at

the maximum operating temperature of the furnace or a

value of 20 degrees above your working temperature if you

desire to provide protection for your workload.

NOTE

If the power to furnace is turned off or

interrupted while in “tuning,” upon returning power to furnace, the controlled display will indicate “LINE FAIL” because

sample data could be questionable. To restart tuning, refer to “Tuning” procedure.

If the control cannot maintain temperature

set point, “tunE FAIL” will appear on display.

First correct problem for not maintaining

temperature set point, then restart tuning.

OPERATION
16

Furnace Loading

For best results of furnace loading and temperature uniformity, use only the center six inches of the furnace

chamber.

Keep objects away from thermocouple.

Use insulated tongs and mittens when loading and unloading furnace.

Always wear safety glasses.

Use the proper process tube.

CAUTION

Do not overload your furnace chamber. Failure

to observe this caution could result in damage

to furnace components.

Furnace Loading
17

Preventive Maintenance

Contamination is a major cause of element failure, therefore, when possible, remove the fume forming material before heating. (e.g., cleaning cutting oil from tool steel).

Housekeeping is vital to your electric furnace—KEEP IT

CLEAN! Run your furnace up to 871°C empty occasionally

to burn off the contamination that may exist on the insulation and elements. Run for approximately two hours with

the process tube removed.

Element life is reduced somewhat by repeated heating and

cooling. If the furnace is to be used again within a few

hours, it is best to keep it at the operating temperature or

at a reduced level such as 260°C.

During normal use the thermocouple in your furnace can

become oxidized and cause inaccurate readings; therefore,

we suggest that if you regularly use your furnace you

should change your thermocouple once every six

months to assure the accuracy of your meter readings.

General Cleaning Instructions

Wipe exterior surfaces with lightly dampened cloth containing mild soap solution.

WARNING

To avoid electrical shock, this furnace must always be disconnect from the power supply prior to maintenance and servicing.

Refer servicing to qualified personnel.

Preventative Maintenance
18

Troubleshooting

WARNING

THIS FURNACE CONTAINS REFRACTORY CERAMIC INSULATION WHICH CAN PRODUCE RESPIRABLE FIBERS AND DUST WHEN HANDLED. THESE FIBERS CAN CAUSE IRRITATION AND CAN

AGGRAVATE PRE-EXISTING RESPIRATORY DISEASE. THE INTERNATIONAL AGENCY FOR

RESEARCH ON CANCER (IARC) HAS CLASSIFIED REFRACTORY CERAMIC FIBER AS POSSIBLY

CARCINOGENIC. 

AFTER SERVICE REFRACTORY CERAMIC FIBER DUST MAY CONTAIN CRYSTALLINE SILICA,

WHICH MAY CAUSE LUNG DAMAGE (SILICOSIS) AND WHICH HAS BEEN CLASSED BY IARC AS A

PROBABLE CARCINOGEN.

The refractory ceramic materials are located in the hearth collar and in the chamber of the furnace. Tests

performed by the manufacturer indicate that there is no significant risk of exposure to dust or respirable

refractory ceramic fiber resulting from operation of the equipment under normal conditions. However,

there may be a risk of exposure to respirable refractory ceramic dust or fiber when repairing or maintaining the insulating materials, or when otherwise disturbing the materials in a manner which causes release of dust or fibers therefrom. Through the use of proper handling procedures you can work safely

with these insulating materials and minimize any exposure. Accordingly, before you repair or replace any

insulating materials, or perform any other servicing on this product which could disturb or cause exposure to dust from insulating materials, you should consult the appropriate Material Safety Data Sheets

(MSDS’s) for such products with respect to proper handling and appropriate protective equipment. For

additional MSDS’s, or additional information concerning the handling of refractory ceramic products,

please contact the Customer Service Department of Barnstead/Thermolyne Corporation.

REFER SERVICING TO QUALIFIED PERSONNEL.

WARNING

Disconnect from the power supply prior to maintenance and servicing.

Refer servicing to qualified personnel.

Troubleshooting
19

The Troubleshooting section is intended to aid in defining and correcting possible service problems. When using the chart, select the problem category that resembles the malfunction. Then proceed to the possible causes category and take necessary corrective action.

Problem Possible Causes Corrective Action

The power light does not The furnace is not connected Check furnace connection to 

illuminate. to power supply. power supply.

No display on Single Set Point ON and OFF power switch Replace power switch.

Control defective.

The furnace does not heat. No power. Check power source and fuses or 

breakers.

Thermocouple is open or Replace thermocouple or check 

thermocouple leads reversed. thermocouple connections.

“SnSr FAIL” will be displayed.

Single Set Point Control Verify and correct all parameters

malfunction.“EE FAIL” will and configuration values.

be displayed. If “EE FAIL” persists, replace 

control.

Element burned out. “LP.Br” will Replace muffle (element).

be displayed.

Solid state relay defective. Replace solid state relay.

Chamber section not connected Reconnect chamber section to 

to base. base.

Slow heatup. Low line voltage. Install line of sufficient size and

proper voltage. (Isolate furnace

from other electrical loads.)

Heavy load in chamber. Lighten load in chamber to

allow heat to circulate.

Wrong heating element. Install proper element.

Low SP.rr setting. Increase setting.

TROUBLESHOOTING
20

Problem Possible Causes Corrective Action

Repeated element burnout. Overheating furnace. Keep furnace under maximum

temperature. Closer supervision

of control setting.

Control malfunction. Replace control.

Incorrect element. Install proper element.

Oxidized thermocouple leading Replace thermocouple.

to inaccurate reading.

Wired improperly. Check wiring diagram for correct 

wiring of your furnace.

Inaccurate temperature readout. Oxidized or contaminated Replace thermocouple.

thermocouple.

Poor thermocouple connection. Tighten connections.

Improper loading procedures. Use proper loading procedures.

Poor ventilation of base. Clear area around furnace base.

Thermocouple connections Reconnect thermocouple 

reversed. correctly. 

*Static charge on pyrometer case. Dispel static charge by 

breathing on cover,

treat for static charge.

Control out of calibration. Contact Barnstead/Thermolyne

P.I.D. values invalid. Re-tune control.

Control malfunction. “EE FAIL” Verify and correct all parameter 

will be displayed. and configuration values.

If “EE FAIL” persists,

replace control.

*Applies to the manual temperature control models.

TROUBLESHOOTING
21

Maintenance and Servicing

To Replace Vestibule End Caps

a. Disconnect furnace from power supply.

b Remove the metal end cap.

c. Remove old vestibule. Insert the new vestibule, aligning

the two holes in the vestibule with the holes on the bracket.

d. Before pushing the metal end caps back onto the chamber, insert the two screws through the holes in the metal

end cap and vestibule. Then, start the two screws into the

holes in the bracket two or three turns, push the metal

end cap onto the chamber and finish tightening the two

screws.

e. Reconnect furnace to power supply.

To Replace The Heating Element Tube (Without

Case Assembly):

a. Disconnect furnace from power supply.

b. Disconnect the cord from furnace chamber to control

base. Identify the color and placement of the thermocouple extension wires and disconnect from control base.

c. Remove furnace chamber from the bracket.

d. Remove both end caps and vestibules of furnace chamber.

e. Remove terminal plate with six screws to expose wiring.

(Note placement and connection of thermocouple and

element wires.)

f. Remove two element lead wires from terminal block. Also,

remove thermocouple by removing two screws on block

then pulling it straight back.

g. Remove the four screws that secure heating element tube

inside the case, then slide out the old heating element

tube.

h. Insert new heating element tube and thread each element

lead wire through the plastic bushings.

i. Secure heating element tube to case.

j. Reinstall thermocouple and connect thermocouple and

new element lead wires to terminal block.

k. Replace terminal plate.

l. Insert the screw on the terminal plate through the mounting bracket and secure with knob.

m. Replace both end caps and vestibules.

n. Reconnect power cord from furnace chamber to control

base.

Maintenancing and Servicing
22

o. Reconnect thermocouple extension wires to control

base terminal block. Looking from the rear of the furnace, reconnect the red wire to the terminal on the right

side of the block. The yellow wire connects to the terminal on the left side of the terminal block.

p. Reconnect furnace to power supply.

To Replace Control Base:

a. Disconnect furnace from power supply.

b. Disconnect power cord from control base to furnace

chamber. Identify the color and placement of the thermocouple extension wires and disconnect wires from

control base.

c. Remove bracket and furnace chamber from control

base.

d. Slide the bracket onto the new control base and secure.

e. Plug power cord from furnace chamber into new control

base.

f. Reconnect thermocouple extension wires as identified

in Step b.

g. Reconnect furnace to power supply.

To Replace Pyrometer (Manual Control Models)

a. Disconnect furnace from power supply.

b. Disconnect power cord from furnace chamber to control

base and disconnect thermocouple extension wires

from control base.

c. Turn control base upside down and remove bottom cover.

d. Remove yellow and red wires from pyrometer.

e. Remove pyrometer from dial plate of control base.

f. Insert new pyrometer and secure to dial plate.

g. Slide the yellow wire over the positive terminal as designated by the positive sign (+) on the back of the pyrometer and secure. Slide the red wire over the negative

terminal on the pyrometer and secure. (Make sure connections are tight or erroneous readout will result.)

h. Replace bottom cover.

i. Turn control base upright and secure furnace chamber

to it.

j. Reconnect power cord from furnace chamber to control

base.

MAINTENANCING AND SERVICING
23

k. Looking from the rear of the furnace, reconnect red coded thermocouple extension wire to the terminal on the

right side of the terminal block. Reconnect yellow thermocouple extension wire to the terminal on the left side of

the terminal block.

l. Reconnect furnace to power supply.

To Replace Manual Temperature Control

Switch:

a Disconnect furnace from power supply.

b. Disconnect power cord from furnace chamber to control

base and disconnect thermocouple extension wires from

control base.

c. Turn control base upside down and remove bottom cover.

d. Remove control knob with two Allen set screws.

e. Remove two screws holding control to dial plate.

f. Disconnect wires from control. Identify or mark wires disconnected from control to insure proper placement and

connection when reinstalling. Remove defective control.

g. Looking from the rear of the furnace, insert new control

with the H1 (vertical lead) and H2 (horizontal lead) leads

on top and secure to dial plate.

h. Turn shaft of control until the flat section is facing up

(opposite of the percent time on indicating mark). Slide

knob over shaft and align the OFF mark with the percent

time on indicating mark. Secure knob with two Allen set

screws.

i. Reconnect the wires identified or marked in Step (f) to

new control.

j. Replace bottom cover.

k. Turn control base upright and secure furnace chamber to

it.

l. Reconnect power cord from furnace chamber to control

base.

m. Looking from the rear of the furnace, reconnect the red

coded thermocouple extension wire to the terminal on the

right side of the terminal block. Reconnect yellow thermocouple extension wire to the terminal on the left side of

terminal block.

n. Reconnect furnace to power supply.

NOTE

Perform only maintenance described in this

manual. Contact an authorized dealer or our

factory for parts and assistance.

MAINTENANCE AND SERVICING
24

To Replace Furnace Chamber:

a. Disconnect furnace from power supply.

b. Disconnect power cord from furnace chamber to

control base. Identify the color and placement of

thermocouple extension wires and disconnect from

control base.

c. Remove black knob holding furnace chamber to

bracket and remove furnace chamber.

d. Remove terminal plate on back of furnace chamber.

(Note placement and connection of wires.)

e. Disconnect thermocouple extension wires and power

cord from terminal block.

f Remove back terminal plate on new furnace chamber.

g. Insert power cord and thermocouple extension wires

through their proper holes in the bracket on the new

furnace chamber. (See Figure 2a or 2b for placement and connection of wires.)

h. Replace back terminal plate.

i. Insert screw on back terminal plate through bracket

slot and secure with knob.

j Reconnect power cord from furnace chamber to control base.

k. Reconnect thermocouple extension wires as identified in Step b.

l. Reconnect furnace to power supply.

To Replace Type K (Chromel/Alumel) Thermocouple (Manual Control Models):

a. Disconnect furnace from power supply.

b. Disconnect the cord from furnace chamber to control

base and also disconnect thermocouple extension

wire from control base.

c. Remove knob that holds furnace chamber to the

bracket and remove the furnace chamber.

d. Remove terminal plate on back of furnace chamber.

e. Remove two screws that secure the old thermocouple and remove thermocouple by pulling straight

back.

f. Insert the new thermocouple until tip extends approximately 1/4" into the heating chamber. Connect

the lead marked (+) on insulator of thermocouple to

the terminal across from yellow thermocouple extension wire, and fasten the other thermocouple lead (-)

to the remaining terminal. (See Figure 2a or 2b.)

MAINTENANCE AND SERVICING
25

(A polarity test of the lead wire is easily made with the

use of a magnet. On chromel/alumel thermocouples and

extension wires, the non-magnetic wire is positive (+ )

and the magnetic wire is negative (- ).

g. Replace terminal plate.

h. Insert the screw on the terminal plate through the mounting bracket and secure with knob.

i. Reconnect power cord from furnace chamber to control

base.

j. Looking from the rear of the furnace, reconnect the red

coded thermocouple extension wire to the terminal on the

right side of the block. The yellow thermocouple extension wire connects to the terminal on the left side of the

terminal block.

k. Reconnect furnace to power supply.

To Replace Type Platinel II Thermocouple (Single Set Point Control Models)

a. Disconnect furnace from power supply.

b. Disconnect the cord from furnace chamber to control

base and also disconnect thermocouple extension wires

from control base.

c. Remove knob that holds furnace chamber to the bracket

and remove the furnace chamber.

d. Remove terminal plate on back of furnace chamber.

e. Remove two screws that secure the old thermocouple

and remove thermocouple by pulling straight back.

f. Insert the new thermocouple until tip extends approximately 1/4" into heating chamber.

g. Connect the blue and yellow beaded thermocouple lead

to the terminal across from yellow thermocouple extension wire and the other thermocouple lead to the remaining terminal.

h. Insert the screw on the terminal plate through the mounting bracket and secure with knob.

i. Reconnect power cord from furnace chamber to control

base.

j. Looking from the rear of the furnace, reconnect the red

coded thermocouple extension wire to the terminal on the

right side of the block. The yellow thermocouple extension wire connects to the terminal on the left side of the

terminal block.

k. Reconnect furnace to power supply.

MAINTENANCING AND SERVICING
26

Replacement Parts List

Series 1029

WARNING

Replace fuses with same type and rating.

Part Number Description Model Number

EL211X1B 120V Element F21125, F21135

EL662X1A 100V Element F21124

EL211X2B 230V Element F21120, F21130, F21130-33

TC211X1A Thermocouple, Chromel/Alumel All Manual Control Models

TC662X1A Thermocouple, Platinel II All Electronic SSP Models

CN71X47 Electronic SSP Control All Electronic SSP Models

CNX60 Manual Control F21124, F21125

CNX61 Manual Control F21120

ME71X4 Pyrometer All Manual Control Models*

RYX34 Solid State Relay All Electronic SSP Models**

FZX31 Fuse, Type ABC, 250V, 8 Amp F21120

FZX28 Fuse, Type ABC, 250V, 15 Amp F21124, F21125 & All

Electronic SSP Models

FZX61 Fuse, Type T, 250V, 6.3 Amp F21130-33

SWX136 Main Power Switch All Electronic SSP Models

CAX94 Filter, EMI F21130-33

CS211X5A Furnace Chamber Complete, 240VF21120

CS211X6A Furnace Chamber Complete, 120VF21125

*All Manual Models — F21120, F21124, F21125

**All SSP (Single Set Point) Models — F21130, F21130-33, F21135

Replacement Parts List
27

Ordering Procedures

Please refer to the Specification Plate for the complete model

number, serial number, and series number when requesting

service, replacement parts or in any correspondence concerning this unit.

All parts listed herein may be ordered from the

Barnstead|Thermolyne dealer from whom you purchased

this unit or can be obtained promptly from the factory. When

service or replacement parts are needed we ask that you

check first with your dealer. If the dealer cannot handle your

request, then contact our Customer Service Department at

319-556-2241 or 800-553-0039.

Prior to returning any materials to Barnstead|Thermolyne

Corp., please contact our Customer Service Department for a

“Return Goods Authorization” number (RGA). Material

returned without a RGA number will be refused.

Ordering Procedures
28

Wiring Diagram for Models F21120, F21124, F21125

Wiring Diagrams

DIAGRAM COMPONENT LIST

F1 FUSE

COLD POWER CORD & PLUG

C/A THERMOCOUPLE

POWER CONNECTOR "COLD" RECPT.

POWER ENTRY MODULE

HEATING ELEMENT

TERMINAL BLOCK

TERMINAL BLOCK

CORD SET

PYROMETER

F2 FUSE

P2

TC

TB2

TB1

P1

M1

J2

J1

H1

CYCLE LIGHT, AMBER

PILOT LIGHT, GREEN

INPUT CONTROL

CAPACITOR

DS2

DS1

CN1

C1

DESCRIPTION

NO.

REF.

C1

B

B

F1 & F2

100, 120, 240 VAC

W

B

H1

CN1

P

H2

L1 L2

GND

G/Y G/Y

N L J1

P1

P2

L

N

GND

J2

L

N

GND

TB2

TC

+ H1

DS2

DS1

W

W

WH2

Y R

TB1

M1

WH1

°C/°F

+ -

Y R
29

Wiring Diagram for Models F21130, F21130-33, F21135

WIRING DIAGRAMS

F21130-33 ONLY

F1 & F2

N L

V

SSR

K1

+

GRY

J1

G

TB1

B

GND

B

W

W

W

L

S1

B

N

W

89 - 250 VAC

GND

B G

G/Y

P1

W

P2

TB2

J2

WH1

R

FL1

R

L

5 12

4

3

2

TB3

TC1

Y

+ H1

WH2

Y

+

N

7

8

9

11 10

 SAFETY SWITCH

OPTIONAL, DOOR/

CN1

V 1 + 6

CN1 TEMPERATURE CONTROL

TERMINAL BLOCK

COLD POWER CORD & PLUG

PLATINEL II THERMOCOUPLE

TERMINAL BLOCK

TERMINAL BLOCK

MAIN PWR SWITCH, W/PILOT LIGHT

SOLID STATE RELAY

HEATER/CHAMBER

POWER CONNECTOR, FEMALE

POWER ENTRY MODULE

TB1

TB3

TC1

TB2

LINE FILTER

FUSE

CORD SET

FUSE

FL1

F2

P2

S1

P1

K1

H1

F1

J2

J1

DESCRIPTION

NO.

REF.
30

Barnstead|Thermolyne Corporation warrants that if a product manufactured by

Barnstead|Thermolyne and sold by it within the continental United States or Canada

proves to be defective in material or construction, it will provide you, without charge, for a

period of ninety (90) days, the labor, and a period of one (1) year, the parts, necessary to

remedy any such defect. Outside the continental United States and Canada, the warranty

provides, for one (1) year, the parts necessary to remedy any such defect. The warranty

period shall commence either six (6) months following the date the product is sold by Barnstead|Thermolyne or on the date it is purchased by the original retail consumer, whichever

date occurs first.

All warranty inspections and repairs must be performed by and parts obtained from

an authorized Barnstead|Thermolyne dealer or Barnstead|Thermolyne (at its own discretion). Heating elements, however, because of their susceptibility to overheating and contamination, must be returned to our factory, and if, upon inspection, it is concluded that failure is not due to excessive high temperature or contamination, warranty replacement will be

provided by Barnstead|Thermolyne. The name of the authorized Barnstead|Thermolyne

dealer nearest you may be obtained by calling 1-800-446-6060 or writing to:

Barnstead|Thermolyne

P.O. Box 797

2555 Kerper Boulevard

Dubuque, IA 52004-0797

USA

FAX: (319) 589-0516

E-Mail: mkt@barnsteadthermolyne.com

Barnstead|Thermolyne’s sole obligation with respect to its product shall be to repair

or replace the product. Under no circumstances shall it be liable for incidental or consequential damage.

THE WARRANTY STATED HEREIN IS THE SOLE WARRANTY APPLICABLE TO

Barnstead|Thermolyne PRODUCTS. Barnstead|Thermolyne EXPRESSLY DISCLAIMS

ANY AND ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR USE.

One Year Limited Warranty
31
Barnstead Thermolyne

2555 Kerper Blvd.

P.O. Box 797

Dubuque, IA 52004-0797 USA

PHONE: 319-556-2241 • 800-553-0039

FAX: 319-589-0516

E-Mail: mkt@barnsteadthermolyne.com

a subsidiary of