MORSØ 5660 Fireplace Insert
Zero Clearance Enclosure
ENCLOSURE MODEL 90566400 FOR INSERT MODEL 5660NA
AndENCLOSURE MODEL 90566000 FOR INSERT MODEL 5660 STANDARD

Morsø US LLC
1011 Hwy. 52 West
Portland, TN 37148
TEL: (615) 323 0561
Report # 192-S-22-2

INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

Installing the Morsø 5660Fireplace Insert Zero Clearance Enclosure
PRODUCT SAFETY
THESE FIREPLACE INSERT ZERO CLEARANCE ENCLOSURES ARE A LISTED COMPONENTFOR AND ARE INTENDED FOR USE WITH THE MORSØ MODELS 5660 STANDARD AND
5660NA WOOD-BURNING FIREPLACE INSERTS ONLY. DO NOT USE OTHER PRODUCTSNOT SPECIFIED OR LISTED FOR USE WITH THESE ENCLOSURES.
WARNING: IF THESE ENCLOSURES AND FIREPLACE INSERTS ARE NOT PROPERLY INSTALLED, A HOUSE FIRE MAY RESULT. TO REDUCE THE RISK OF FIRE, FOLLOW THE INSTALLATION INSTRUCTIONS EXACTLY. CONTACT LOCAL BUILDING OR FIRE OFFICIALSABOUT RESTRICTIONS AND INSTALLATION INSPECTION REQUIREMENTS IN YOUR AREA.
IT IS A GOOD IDEA TO REVIEW YOUR PLANS WITH THEM BEFORE BEGINNING THE INSTALLATION. ASK YOUR MORSØ AUTHORIZED DEALER FOR HELP WITH LOCAL OFFICIALS IFNEEDED.
WHEN INSTALLLED IN THESE FIREPLACE INSERT ZERO CLEARANCE ENCLOSURES IN THEUNITED STATES, THE MORSØ MODELS 5660 STANDARD AND 5660NA FIREPLACE INSERTSMUST ONLY BE CONNECTED TO ONE OF THE SPECIFIC CHIMNEYS LISTED ON PAGE 4 OFTHIS MANUAL.

DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
PLEASE READ THIS ENTIRE MANUAL BEFORE YOU INSTALL AND USE THE FIREPLACE INSERT ZERO CLEARANCE ENCLOSURE AND MORSØ MODEL 5660 STANDARD OR 5660NAFIREPLACE INSERT. FAILURE TO FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTYDAMAGE, BODILY INJURY OR EVEN DEATH.
FOR FURTHER INFORMATION, REFER TO THE NATIONAL FIRE PROTECTION ASSOCIATIONANSI/NFPA 211 STANDARD FOR CHIMNEYS, FIREPLACES, VENTS AND SOLID FUEL BURNING APPLIANCES.
REFER TO THE MORSØ MODEL 5660 STANDARD OR 5660NA OPERATING INSTRUCTIONSFOR INFORMATION ON THE PROPER USE AND MAINTENANCE OF THE FIREPLACE INSERT.
WARNING: THIS FIREPLACE INSERT ZERO CLEARANCE ENCLOSURE IS NOT A FIREPLACE.
BUILDING A FIRE IN THE ENCLOSURE WITHOUT THE MORSØ MODEL 5660 STANDARD OR
5660NA INSTALLED IS PROHIBITED AND MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH.

2

Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
SELECTING THE LOCATION FOR YOUR INSTALLATIONThis insulated metal fireplace insert zero clearance enclosure enables the MORSØ MODEL 5660
STANDARD or MODEL 5660 NA Fireplace Insert to be installed in minimum–clearance situations inlocations without an existing masonry fireplace. This could be in new home construction or inhomes that are being remodeled.
Centrally located installations generally provide and circulate the heat most effectively. An interiorchimney is preferred as it will stay warmer and provide a more consistent draft than an exterior chimney. However, many installation options are possible. If an exterior chimney is necessary for yourinstallation, it is recommended that exterior chimney be enclosed in a chase to minimize heat loss.

The Model 90566000 or Model 90566400 Fireplace Insert Zero Clearance Enclosure may be elevated off the floor to allow the Insert Model 5660 STANDARD or 5660NA to be placed higherup on the wall. This will require construction of a base structure to support the enclosure and insert.
The base structure should meet the same structural requirements as any other floor construction
meeting building code requirements in your area since it is supporting and transferring the appreciable weight of the enclosure and the Insert to the floor below it. The surface of the base structure
should be covered with a minimum of one layer of ¾ plywood. The distance from the top of the support structure to the ceiling above Models 5660 STANDARD or 5660NA may be no less than67” (1701mm). See FIG. 5 on page 8 for support structure information.
The face of the support structure should be covered with non-combustible materials only, all the way
to the floor.

3Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
CHIMNEY REQUIREMENTS
For proper draft and best performance, the chimney should extend at least 15’ (4.6m) and not morethan 35’ (10.6m) above the level of the MORSØ Model 5660 STANDARD or Model 5660NA hearth.
The chimney must be properly installed and supported in accordance with the chimney manufacturer’s instructions. The enclosure is not intended to support the entire weight of the chimney. Support components are available from the chimney manufacturer.
If possible, an installation with a straight vertical chimney will provide the best draft and will be easiest to clean.
If a straight chimney is not possible due to obstructions, up to four 30° elbows may be used to offset
the chimney around the obstructions. The elbows must be used in pairs in order to return the chimney to vertical after passing the obstruction. The first offset must be at least 8’ (2.5m) above theInsert hearth.
The Morsø 5660 Fireplace Insert Zero Clearance Enclosures are approved for installation in theUnited States with the following chimneys:
Metal Fab, Inc.
Security Chimneys
Selkirk Metalbest
Simpson-Dura-Vent

Model TG
Model ASHT
Model Ultra-Temp
Model Dura-Plus (SDP)

The chimney installation begins with a base plate or anchor plate mounted to the top of the Fireplace
Insert zero Clearance Enclosure. Before the base plate is installed on the enclosure top, the flexible
stainless steel flue connector (provided with the enclosure) that will connect the Insert to the chimney system must be attached to the base plate using the four provided sheet metal fasteners. SeeFIG. 1.
Next, insert the anchor plate/flex connector assembly down
through the hole in the top of the enclosure. Use the four
provided sheet metal fasteners to secure the base/anchor
plate to the enclosure top.

Chimney Base/Anchor Plate

Sheet MetalFasteners

Next slide the stainless steel 45° slip connector elbow all
the way onto the stainless flex connector in preparation for
installing the Insert.

Stainless SteelFlex Connector

Stainless Steel
45° Slip Elbow

FIG. 14Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
COMBUSTIBLE FRAMING
The Morsø 5660 Fireplace Insert Zero Clearance Enclosure is designed with spacers on the sideand back surfaces that prevent the enclosure walls from coming in contact with adjacent combustible materials that are used for framing around the enclosure. In addition, the top of the enclosure
includes a standoff that prohibits the header for the combustible construction above the enclosure
from being installed too close the heat from the Insert, enclosure top and chimney. Under no circumstances should the spacers or standoff be modified. REDUCTIONS TO ANY OF THE REQUIRED CLEARANCES MAY RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVENDEATH.
Refer to the adjacent illustration for minimum clearance
requirements. Typical framing along with rough framing
dimensions are shown in FIGS. 2, 3 & 4 on page 7 ofthese instructions. The actual framing details will vary depending on the placement of your enclosure and insert. It
is important to take care when framing to be sure that thearea under the enclosure is level and that all framing
members are plumb. Forcing the enclosure into a opening that is not level and plumb will cause problems later in
the installation process and should be avoided.

MINIMUM CLEARANCE TO COMBUSTIBLE
MATERIALS
A10”
254mm
B2”
51mm
C3”
76mm
D67”
1702mmE
29 1/4”743mm

It is important to note that only nominal 2 X 4 framing materials should be used to frame the area directly above thestandoff on the front of the enclosure. This is necessary
to prevent combustible framing from encroaching in thespace above the enclosure top. We suggest that theframing for the area directly above the standoff on the front of the enclosure be done after the enclosure is secured in place and chimney has been installed. This allows room to work on the chimney
and for access for the building inspector.
Once the rough framing is completed, the Fireplace Insert Zero Clearance Enclosure (with chimneybase or anchor plate and flexible vent connector installed) can be slid into the rough opening. Make
any last adjustments to center the enclosure in the opening and secure in place with at least fournails using the pilot holes provide in the enclosure front flanges. Countersink the nail heads until
they are flush with the front flange surfaces as this will facilitate installation of facing materials later.

CHIMNEY INSTALLATIONWith the Fireplace Insert Zero Clearance Enclosure secured to the framing, the chimney system may
now be installed. Follow the chimney manufacturer‘s instructions exactly including the use of all
support hardware, elbows, joist, attic and insulation shields, firestops, flashing kits, storm collars andcaps. The safety and functionality of the chimney are critical parts of the installation of the enclosureand Insert.
After the chimney installation is complete, install the framing above the standoff on the front of theenclosure. This would be a good time to install the required non-combustible facing base material to
the front of the enclosure. See FIG. 6 on page 8 for information on the limits for placement of combustible and non-combustible materials. We recommend that you wait to place any combustible facing materials on any framing until after the installation has been inspected and approved by your lo5

Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
ELECTRICAL CONNECTIONS
If you are installing the Model 5660 NA with the optional blower, you must have electrical power connected to the single outlet provided on the side of Enclosure Model 95066400. Refer to the National
electrical Code, ANSI/NFPA 70 and other local code requirements. Use a licensed electrician. The
electrical specifications are 120 VAC, 60Hz, less than 1 amp.

OUTSIDE AIR
If the Outside Air Kit is to be installed, remove the Outside Air Cover Plate from the rear of the enclosure. This will allow the outside air duct to pass through the rear wall of the Fireplace Insert ZeroClearance Enclosure.

VENTILATION AIR
The chase or cavity in which the enclosure is installed must be ventilated with air from outside ofthe chase. A minimum of 24 square inches (154.8 square cm) of opening must be provided in thechase wall no more than 24 inches (609 mm) from the floor of the chase. The opening may be located in the floor of the chase between the enclosure and the walls of the chase. The opening may
incorporate an architectural grate or grill as long as the 24 square inch opening is maintained.

6Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
RECOMMENDED ROUGH FRAMING DIMENSIONS

CBA

FIG. 2 Framing Front View

FIG. 3 Framing Side View

B

A = 67” (1702mm)
B = 39 3/4”(1010mm)
C = 25 1/2” (648mm) MinimumC

Note: These dimension are forboth Model 90566000 andModel 90566400 Enclosures

FIG. 4 Framing Plan View

7

Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
MINIMUM CLEARANCES TO ADJACENT COMBUSTIBLE MATERIALS
Combustible / Non-Combustible Material Limits
E = 39 3/4” (1010mm) F = 67” (1702mm)G = 28 3/4” (730mm) J = 29 1/4” (742mm)
Ceiling

Model 5660
21 3/8” (543 mm)
16 3/8” (416mm)

H
K

Model 5660NA
26 1/8 “ (664)
11 5/8” (295)EDJ

D = 67”(1702mm)
MinimumF

Non-Combustible
Materials OnlyGH

Top of enclosure
support structure
when enclosure iselevated off floor

K

FIG. 5

FIG. 6

FIG. 78

Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
HEARTH REQUIREMENTS
When using the Insert in the Fireplace Insert Zero Clearance L = 39 3/4” (1010mm) Min.
Enclosure, the hearth protection requirements are different
M = 16” (405 mm) Min. USA
than when installing the Insert in an existing masonry fireN = 8” (203mm) Min.
place. The enclosure has been designed to elevate the insert to the minimum distance above the combustible floor
where no thermal floor protection is required. However,unless the Fireplace Insert Zero Clearance Enclosure will be
installed on a completely non-combustible surface such as
DOOR OPENIN
NGN
unpainted concrete over earth, spark and ember floor protection must be provided in front of the insert and enclosure.
This will protect the combustible floor in front of the loadMdoor from spilled coals or embers.
LFIG. 8The floor protector can be made from any completely noncombustible material such as galvanized steel or non-combustible tile backer board. These materials may be covered with decorative non-combustible materials such as ceramic tile. Other noncombustible materials may be used if there are no gaps or joints between pieces that would allowcoals or embers to reach the combustible floor underneath. Floor protectors meeting the requirements of UL-1618 Type 1 are acceptable.
The floor protector must extend at least 8” (203mm) from the sides of the firebox opening making theminimum total width of the floor protector 39 3/4“ (1010mm). In addition, the floor protector must extend a minimum of 16” (406mm) in front of the door opening in the United States. See FIG. 8.
In addition, a 3” X 39 3/4 “ (76mm X 1010 mm) sheet metal spark protector strip must be laid under
the junction between the front of the enclosure and the floor
protector to prevent coals or embers from reaching the combustible floor. See FIG. 7 on page 8.
12” (305mm)
Max. Depth

COMBUSTIBLE MANTEL
A combustible mantel and any associated trim may be mounted
to the wall above the Insert. The mantel (or trim) must be aminimum of 24 1/4” (616mm) above the top flange on theInsert. See FIG. 9. The mantel may not be deeper than12” (305mm).

29 1/4”(742mm)

FIG. 99

Installing the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
CUSTOMIZING THE FINISHED APPEARANCE
The facing of the Fireplace Insert Zero Clearance Enclosure may be finished to give a variety of different aesthetic appearances. However, only non-combustible materials may be applied to the faceinside the specified limits for combustible materials. See FIG. 6 on page 8. Outside the combustible
limits, the any surface finish may be used.
For a smooth wall appearance, non-combustible tile backer board may be used as a base for plasterallowing a seamless transition beyond the combustible limits to traditional wallboard.
For tile, veneer brick or stone, the finish material may be applied over non-combustible tile backerboard. The requirements for the facing material applied inside the combustible limits are:••••

The material must be non-combustible.
The total thickness, including non-combustible backer board and adhesive should not exceed
13/16” (20mm).
Facing materials should not encroach into the front opening in the enclosure in order to allow
proper insertion of the Insert .
Combustible trim at the transition to combustible facing material must not protrude into the room
more than ¾” (19mm) from the facing material.

13/16” (20mm) Max.

Non-Combustible Tile
Backer Board
Insert Flange

13/16” (20mm) Max.

Non-Combustible Tile
Backer Board

Combustible Wallboard
or Tile Backer Board

Insert Flange

Non-CombustibleTile

FIG. 10 Facing Options

10Combustible Wallboard
or Metal Lath

Plaster Skim CoatInstalling the Morsø 5660 Fireplace Insert Zero Clearance Enclosure
Prepare the Insert
Refer to the Morsø Installation and Operating Instructions for either Model 5660 NA Standard or5669 NA with New Blower for instructions on how to prepare the insert for installation.
Follow the Blower Installation instructions on page 14 if you are installing the Insert with the optional
blower. Plug the blower power cord into the electrical outlet in the side of the enclosure. Route thepower cord between the insert stand and the enclosure side.
In order to connect the chimney to the insert it is necessary to remove the baffle and firebox liners.
It is not necessary to completely disassemble the insert. Do not remove the cast iron flue collar.
The instructions in the Morsø Insert manual will show you how to do this starting on page 6.

Install the Insert into the Fireplace Insert Zero Clearance Enclosure
1. Using a helper or stove lifter, place the insert on the platform inside the enclosure. Push the insert back into the enclosure opening until the insert flange contacts the facing material. Check to
be sure the insert is centered in the enclosure opening.
2. Adjust the leveling screws until the face plate is level and plumb or aligned with any joints in thefacing material.
3. Reach up through the flue opening and pull down on the stainless steel 45° slip connector elbow
using the handle provided in the elbow. Make sure the connector elbow is full engaged in theinsert flue flange. See FIG. 11.
4. Bend the two tabs over to secure the connector elbow. See FIG. 12.
5. Replace the baffle using the reverse order for removal.
6. Replace the stones (firebrick).
7. Replace the door

Chimney Base/Anchor Plate

Stainless SteelFlex Connector
Stainless Steel
45° Slip Elbow
Flue Flange

FIG.12 Bending Flue Tabs

FIG.11 Cutaway View Showing Flue Connection

11V1.US12