kozy heat Dassel DSL-36-RF User manual

DIRECT VENT FIREPLACE
WARNING: This product must be
installed by a licensed plumber or gas
fitter when installed in the
commonwealth of Massachusetts.
IMPORTANT: Installation of a CO
detector is required in the fireplace
room when installed in the
commonwealth of Massachusetts.
◙Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
IF YOU SMELL GAS:
◙Do not light any appliance.
◙Do not touch any electrical switch: do not use any phone in your building.
◙Immediately call gas supplier from a neighbors phone. Follow the gas supplier instructions.
◙If you cannot reach your gas supplier, call the fire department.
◙Installation and service must be performed by a qualified installer, service agency or the gas
supplier.
WARNING: If the information in these instructions are not followed exactly, a fire or
explosion may result, causing property damage, personal injury or loss of life.
This appliance may be installed in an aftermarket permanently located, manufactured (mobile) home,
where not prohibited by local codes.
This appliance is only for use with the type (s) of gas indicated on
the rating plate. A conversion kit is supplied with the appliance.
www.kozyheat.com
INSTALLATION
AND
OPERATION MANUAL
Quality Fireplaces for Life
DO NOT
DISCARD
INSTALLER: LEAVE THIS MANUAL WITH THE APPLIANCE.
CONSUMER: RETAIN THIS MANUAL FOR FUTURE REFERENCE.
May 2009
DSL-36-REV-03

CONGRATULATIONS!
We welcome you as a new owner of a Kozy Heat gas fireplace. Kozy Heat
products are designed with superior components and materials and assembled by
trained craftsmen who take pride in their work. The burner and valve assembly are
100% test-fired and the complete fireplace is thoroughly inspected before packaging
to ensure that you receive a quality product. Our commitment to quality and
customer satisfaction have remained the same for over 30 years. We offer a
complete line of gas and wood fireplaces, unique cabinets and stylish accessories to
compliment any décor. Adding a fireplace is one of the best ways to increase the
value of your home and we are proud to offer a network of dealers throughout the
country to help make your experience everything you imagine. We pride ourselves in
being dedicated to not only function and reliability, but customer safety as well.
We offer our continual support and guidance to help you achieve the maximum
benefit and enjoyment from your Kozy Heat gas fireplace.
Jim Hussong Dudley Hussong
President Board Chairman
INTRODUCTION
Read this manual before installing or operating this appliance.
Please retain this owner’s manual for future reference.
Homeowner Reference Information
We recommend that you record the following information about your fireplace.
Model Name:______________________________ Date purchased/installed:____________
Serial Number:____________________________ Location on fireplace:_______________
Dealership purchased from:__________________ Dealer Phone:_____________________
Notes:_____________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
PAGE 1

TABLE OF CONTENTS
PAGE 2
INTRODUCTION
Introduction and Homeowner Reference Information 1
TABLE OF CONTENTS
Table of Contents 2-3
SAFETY INFORMATION
Safety Information 4
FEATURES
Features 5
COMMONWEALTH OF MASSACHUSETTS INFORMATION
Commonwealth of Massachusetts Information 6-7
SPECIFICATIONS
Fireplace Framing Dimensions 8
Clearances 9
Components List 10
Installation Overview 10
Placement Clearance Requirements 10
PREPARE THE FIREPLACE
Stand-off Assembly & Installation 11
Nailing Flange Assembly & Installation 12
FRAMING
Wall Enclosure Rough Opening 13
Minimum Finished Opening Dimensions 13
Horizontal Terminations 14
Vertical Terminations 14
TYPICAL INSTALLATION OPTIONS
Typical Installation Options 15
MANTEL REQUIREMENTS
Mantel Requirements 16
GLASS FRAME ASSEMBLY
Glass Frame Assembly Removal 17
Glass Frame Assembly Installation 17
FAN INSTALLATION
TMT-028 (DSL-36 only) Optional Fan Installation 18-19
GAS LINE CONNECTION
Gas Line Connection 20
DSL-36 THERMOSTAT / WALL SWITCH / REMOTE
DSL-36 Thermostat / Wall Switch / Remote 21
VENTING
Horizontal Vent System Clearances 22
Min. / Max. Horizontal Vent System Information 22
#800-WPT Wall Pass-Thru Installation Instructions 23
Min. / Max. Horizontal Terminations (5” x 8”) Illustrations 24
Minimum Horizontal Corner Installation Information & Illustrations 25
Horizontal Vent Heat Shield 26
Min. / Max. Horizontal Termination Illustrations (8” x 6-5/8” Decreaser) 27

PAGE 3
TABLE OF CONTENTS cont.
VENTING cont.
Vertical Vent System Clearance / Termination Information 28
Restrictor Information 28
Vertical / Horizontal Combination Information 28
Elbows 28
Min. / Max. Vertical Termination Illustrations (5” x 8”) 29
Restrictor Installation 29
Min. / Max. Vertical Termination Illustrations (8” x 6-5/8” Decreaser) 30
Vertical / Horizontal Combination Term. Illustration (5” x 8”) 31
Vertical / Horizontal Comb. Term. Illustration (8” x 6-5/8” Decreaser) 31
Termination Chart 32
#800 Series Direct Vent Termination Kit (Horizontal Terminations) 33-34
Termination Vent Cap Location Clearances 35
Vent Termination Clearances 36
LOG SET INSTALLATION
Log Set Installation 37-40
MILLIVOLT BOARD
Millivolt Board Removal 41
Millivolt Board Installation 42
GRILL SET
Grill Set Installation 43
Grill Set Removal 43
DSL-36 OPERATION PROCEDURES
DSL-36 Valve and Pilot Assembly Components 44
DSL-36 Lighting and Shutdown Instructions 45-47
DSL-36 Pressure Testing 48
DSL-36-RF OPERATION PROCEDURES
DSL-36-RF Valve and Pilot Assembly Components 49
DSL-36-RF Lighting and Shutdown Instructions 50-52
DSL-36-RF Pressure Testing 53
DSL-36-RF Remote Receiver Functions 54-55
FINALIZING THE INSTALLATION
Burner Tube Venturi Adjustment / Troubleshooting 56
Restrictor (troubleshooting and installation after termination completion) 57
MAINTENANCE
Maintenance 58
TROUBLESHOOTING
DSL-36 Troubleshooting 59-61
DSL-36-RF Troubleshooting 62-64
APPROVED VENTING
Approved Venting Caps 65
REPLACEMENT PARTS
Replacement Parts 66
WARRANTY
Warranty 67-68

Installation and repair should be done only by a qualified service person. The appliance should be
inspected by a qualified service person before use. Annual inspection by a qualified service person is
required to maintain warranty. More frequent cleaning may be required due to excessive lint from
carpeting, bedding materials, etc. It is imperative that control compartments, burners and
circulation air passageways of the appliance be kept clean.
If this appliance is installed directly on carpeting, tile or other combustible material other than wood
flooring, the appliance shall be installed on a metal or wood panel extending the full width and depth
of the appliance.
Children and adults should be alerted to the hazards of high surface temperatures and should stay
away to avoid burns or clothing ignition.
Young children should be carefully supervised when they are in the same room as the appliance.
Clothing or other flammable material should not be place on or near the appliance.
Adequate accessibility clearances for servicing and proper operation must be maintained.
This appliance must not share or be connected to a chimney flue serving any other appliance.
Keep area around the appliance clear of combustible materials, gasoline and other flammable vapor
and liquids.
The flow of combustion and ventilation air must not be obstructed.
Due to high temperatures the appliance should be located out of traffic and away from furniture and
draperies.
The glass front or any part removed for servicing the appliance must be replaced prior to operating
the appliance. Work should be done by a qualified service technician.
Clean glass only when cool and only with non-abrasive cleansers.
Do not operate this appliance with the glass/frame assembly removed, cracked or broken. The glass
assembly, Part #DSL-057T, shall only be replaced as a complete unit, as supplied by Hussong Mfg.
Co., Inc. Replacement of the glass assembly must only be performed by a licensed or qualified service
person. DO NOT SUBSTITUTE MATERIALS.
Do not strike or slam glass assembly.
Any safety screen or guard removed for servicing the appliance must be replaced prior to operating
the appliance.
Under no circumstances should any solid fuel (wood, coal, paper or cardboard etc.) be used in this
appliance.
Keep burner and control compartment clean.
Do not use this fireplace if any part has been under water. Immediately call a qualified service
technician to inspect this appliance and to replace any part of the control system and any gas control
which has been under water.
This fireplace has been tested to and complies with ANSI Z21.88a-2007·CSA 2.33a-2007·CSA P.4.1-02 “VENTED GAS
FIREPLACE HEATERS” by OMNI-Test Laboratories, Beaverton, OR. Installation must conform with local building
codes or in the absence of local building codes, with the National Fuel Gas Code, ANSIZ223.1/NFPA 54 - Current Edition,
or the Natural or Propane Installation Code, CSAB149.1
SAFETY INFORMATION
PAGE 4

High efficiency
High quality lifetime glass
23-3/4” x 30-1/16” (603 mm x 764 mm)
Quick latch glass frame assembly
Upper grill / hood & lower grill (black)
Accepts rigid pipe or Kozy Heat flexible vent system, no adaptor necessary
High - Low regulator
Patented log design
Automatic fan kit (1) - 75 CFM*
Refractory brick lining*
Minnesota Energy Code compliant to 50 pascals
*Standard on RF model
Original Sandstone refractory*
Red brick refractory
Automatic fan kit with variable speed control (75 CFM)
Remote control* or thermostat remote control
Wall mount thermostat / wireless wall mount thermostat
Decorative full door faces in various styles and finishes
Renaissance pattern front
Mission design doors in various finishes
Various cabinet & flush surrounds
*Standard on RF model
Each unit factory tested!
Tested by OMNI - Test Laboratories
Sealed combustion chamber with standing pilot ignition
Removable millivolt board with 30-second delay pilot
Automatic pressure relief glass system
Requires no electricity to operate
(excluding fan)
Bedroom and mobile home approved
Fireplace Weight (as packaged for shipment)
150 lbs. (68.04 kg)
Fireplace Weight (without packaging)
110 lbs. (49.9 kg)
FEATURES
PAGE 5
STANDARD FEATURES
OPTIONAL FEATURES
WEIGHT
SAFETY FEATURES

COMMONWEALTH OF MASSACHUSETTS REQUIREMENTS
NOTE: The following requirements
reference various Massachusetts and
national codes not contained in this
manual.
For all sidewall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or
in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust
vent termination is less than (7) feet above finished grade in the area of the venting, including but not limited to decks and
porches, the following requirements shall be satisfied:
INSTALLATION OF CARBON MONOXIDE DETECTORS
At the time of installation of the side wall horizontally vented gas fueled equipment, the installing plumber or gas-fitter shall
observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where
the gas equipment is to be installed. In addition, the installing plumber or gas-fitter shall observe that a battery operated or
hard wired carbon monoxide detector is installed on each additional level of the dwelling, building or structure served by
the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the ser-
vices of qualified licensed professionals for the installation of hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or attic, the hard wired
carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner
shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty
(30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.
APPROVED CARBON MONOXIDE DETECTORS
Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be
ANSI/UL 2034 listed and IAS certified.
SIGNAGE
A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum of eight (8)
feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or
equipment. The sign shall read, in print no less the one-half inch (1/2) in size, “GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS”.
INSPECTION
The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation
unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the pro-
visions of 248 CMR 5.08 (2) (a) 1 through 4.
EXEMPTIONS
The following equipment is exempt from 248 CMR 5.08 (2) (a) 1 through 4:The equipment listed in Chapter 10 entitled
“Equipment Not Required To Be Vented” in the most current edition of NFPA 54 as adopted by the Board; and Product
Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling,
building or structure used in whole or in part for residential purposes.
PAGE 6

COMMONWEALTH OF MASSACHUSETTS REQUIREMENTS
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED
When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system de-
sign or venting system components with the equipment, the instructions provided by the manufacturer for installation of
the equipment and the venting system shall include:
Detailed instructions for the installation of the venting system design or the venting system components; and
A complete parts list for the venting system design or venting system.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED
When the manufacturer of Product Approved side wall horizontally vented gas equipment does not provide the parts for
venting the flue gases, but identifies “special venting systems”, the following requirements shall be satisfied by the manu-
facturer:
The referenced “special venting systems” instructions shall be included with the appliance or equipment
installation instructions and;
The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall
include a parts list and detailed installation instructions.
A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all
venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the ap-
pliance or equipment at the completion of the installation.
PAGE 7

FIREPLACE DIMENSIONS
LETTER KEY A B C D E F G H
DESCRIPTION Height Width Back Width Depth Opening
Width
Glass Frame
Height
Stand-off
Height
Back to
vent center
FIREPLACE
DIMENSIONS
INCHES 32 35-7/8 27-7/8 15-1/4 31-3/8 24-3/8 10 7-1/2
MILLIMETERS 813 911 708 387 797 619 254 191
SPECIFICATIONS
8” INTAKE COLLAR
STAND-OFFS
PAGE 8
(B)
35-7/8”
911 mm
(D)
15-1/4”
387 mm
(C)
27-7/8”
708 mm
(G)
10”
254 mm
(A)
32”
813 mm
(F)
24-3/8”
619 mm
WARNING:
NON-COMBUSTIBLE ZONE:
STAND-OFFS PROVIDE THE
10” (254 mm) MINIMUM
CLEARANCE TO HEADER. USE
ONLY NON-COMBUSTIBLE
MATERIAL IN THIS AREA FOR
THE ENTIRE WIDTH OF
FIREPLACE. DO NOT USE
WOOD, SHEETROCK ETC. IN
THIS ZONE.
NOTE: OTHER CLEARANCES
APPLY. ALL CLEARANCES
MUST BE MAINTAINED.
REFER TO PAGE 16 FOR
MORE INFORMATION.
(E)
31-3/8”
797 mm (B)
35-7/8”
911 mm
(H)
7-1/2”
191 mm
5” EXHAUST COLLAR
STAND-OFFS
STAND-OFF HEAT SHIELD
NOTE:
STAND-OFF HEAT SHIELD
NOT SHOWN FOR CLARITY
PURPOSES ONLY.

Top of unit face to framing - 10” (254 mm)
From unit left & right sides & back - 1/4” (6 mm)
To flooring - 0” (0 mm)
Unit top to ceiling - 31” (787 mm)
Unit side to adjacent sidewall - 1-1/2” (38 mm)
Unit front to combustibles - 36” (914 mm)
Top of unit to 3/4” (19 mm) trim - 10” (254 mm)
Mantel must be a minimum of 16” (406 mm) above top of unit. The maximum mantel depth at this height is
4” (102 mm) deep. See additional mantel clearance configurations on page 16of this installation manual.
SPECIFICATIONS
RIGHT SIDE
LEFT SIDE
GAS LINE HOLE
ELECTRICAL
ACCESS
PAGE 9
8-3/8”
213 mm
5-1/2”
140 mm
9-1/2”
241 mm
CLEARANCES
2-3/4”
70 mm
STAND-OFF
WARNING:
NON-COMBUSTIBLE ZONE:
STAND-OFFS PROVIDE THE
10” (254 mm) MINIMUM
CLEARANCE TO HEADER. USE
ONLY NON-COMBUSTIBLE
MATERIAL IN THIS AREA FOR
THE ENTIRE WIDTH OF FIRE-
PLACE. DO NOT USE WOOD,
SHEETROCK ETC. IN THIS
ZONE.
NOTE: OTHER CLEARANCES
APPLY. THESE CLEARANCES
MUST BE MAINTAINED.
REFER TO PAGE 16 FOR
MORE INFORMATION.
GAS LINE HOLE
FIREPLACE FRONT FIREPLACE FRONT
THERMOSTAT WIRE
STAND-OFF

MODEL #DSL-36 COMPONENTS LIST
(#DSL-770) - Millivolt Board Assembly with 18” Flexible Gas
Line attached
(#700-203) - Manual Gas Shut-off Valve
(#DSL-135) - Burner / Log Grate Assembly
(#DSL-500) - Log Package with „Klinkers‟ and Rock Wool
Embers
(#DSL-057T) - Glass Frame Assembly
(#OCK-S53A) - LP Conversion Kit
(#600-083) - Receptacle / Speed Control Assembly with (3)
Wire Nuts
(#942085) - 5” Restrictor Plate
(#DSL-HHS) - Horizontal Vent Heat Shield
(#500-DSL) - Grill Assembly: Upper Hood, Upper Louver and
Lower Grill
1. Frame an opening for the fireplace, allowing for vent installation and type of installation (corner or flat wall application).
2. If masonry (optional) will be used, prepare foundation for the masonry load. A lintel is required to support the added weight above the
fireplace.
3. Attach stand-off brackets and nailing flanges to fireplace.
4. Insert fireplace into framing.
5. Install the hearth (if applicable).
6. Complete the gas line installation.
7. Complete the electrical hook-up. Install any standard or optional electrical components at this time.
8. Complete the venting installation.
9. Secure fireplace to flooring through holes located in the outer box bottom and to framing with nailing flanges. Verify all clearances at
this point.
10. Install facing material, mantel or cabinetry, allowing room for optional full face doors, if applicable.
11. Install logs.
12. Install grills and optional decorative doors / faces.
13. Verify proper operation of fireplace and all components.
PLACEMENT CLEARANCE REQUIREMENTS
This fireplace must be installed on a level surface capable of supporting the fireplace and venting.
Fireplace must be placed directly on wood or non-combustible surface (not linoleum or carpet) extending the entire depth and width of
fireplace.
Due to high surface temperatures, fireplace should be located out of traffic and away from furniture and draperies.
This fireplace may be installed in a bedroom.
Please be aware of the large amount of heat this fireplace will produce when determining a location.
SPECIFICATIONS
INSTALLATION OVERVIEW
NOTE: The qualified installer should
follow the procedure best suited for
the installation.
PAGE 10
MODEL #DSL-36-RF COMPONENTS LIST
(#DSL-800-RF) - Millivolt Board Assembly with 18” Flexible
Gas Line attached
(#700-203) - Manual Gas Shut-off Valve
(#DSL-135) - Burner / Log Grate Assembly
(#DSL-500) - Log Package with „Klinkers‟ and Rock Wool
Embers
(#DSL-057T) - Glass Frame Assembly
(#OCK-H53L-RF) - LP Conversion Kit
(#700-108) - Remote control
(#942085) - 5” Restrictor Plate
(#DSL-HHS) - Horizontal Vent Heat Shield
(#500-DSL) - Grill Assembly: Upper Hood, Upper Louver and
Lower Grill

PREPARE THE FIREPLACE
The top stand-off brackets and stand-off heat shield are attached to the fireplace top in a flat state for shipping.
1. Remove and save the (4) screws securing stand-off heat shield and stand-off brackets.
2. Form each stand-off bracket as shown.
3. Re-attach stand-off brackets to fireplace using screws previously removed along with (4) screws provided in fireplace
components packet.
4. Form stand-off heat shield and attach to stand-off brackets with (2)screws provided in the fireplace components packet.
(Flange on stand-off heat shield faces „up‟ and to the back of fireplace).
CAUTION: NEVER PERMANENTLY REMOVE
THESE ASSEMBLIES FROM THE FIREPLACE -
THEY MUST BE SECURED IN PLACE
REGARDLESS OF FINISH MATERIAL USED.
STAND-OFF ASSEMBLY & INSTALLATION
IMPORTANT: THE TOP STAND-OFF BRACKETS MUST BE
FORMED AND ATTACHED PRIOR TO POSITIONING THE
FIREPLACE INTO FRAMED OPENING.
PAGE 11
WARNING:
NON-COMBUSTIBLE ZONE:
STAND-OFFS PROVIDE THE 10” (254 mm)
MINIMUM CLEARANCE TO HEADER. USE
ONLY NON-COMBUSTIBLE MATERIAL IN
THIS AREA FOR THE ENTIRE WIDTH OF FIRE-
PLACE. DO NOT USE WOOD, SHEETROCK ETC. IN
THIS ZONE.
NOTE: OTHER CLEARANCES MUST BE
MAINTAINED. REFER TO PAGE 16 FOR
MORE INFORMATION.
STAND-OFF BRACKETS
AS SHIPPED
REMOVE SCREWS SECURING
EACH STAND-OFF BRACKET
ATTACH BOTH STAND-OFF BRACKETS BY
ALIGNING WITH HOLES IN FIREPLACE TOP.
SECURE WITH (4) SCREWS AS SHOWN.
FORM STAND-OFF BY BENDING
AT PERFORATIONS AS SHOWN
FORMED STAND-OFF
STAND-OFF BRACKETS
INSTALLED ATTACH STAND-OFF HEAT SHIELD BY
ALIGNING WITH HOLES IN STAND-OFF
BRACKETS. SECURE WITH (4) SCREWS
AS SHOWN.
CAUTION:
STAND-OFF
BRACKETS ARE NOT
LOAD BEARING.

NAILING FLANGE ASSEMBLY & INSTALLATION
When installed, nailing flanges provide the minimum 1/4” (6 mm) clearance from fireplace sides.
1. Remove the (4) nailing flanges from fireplace sides.
2. With the 1/4” (6 mm) stand-offs on the nailing flanges facing away from fireplace, align nailing flange with the holes on the
outside corners of fireplace . Secure with screws (provided in installation manual parts packet) through the slots in the nail-
ing flanges .
3. Bend perforation on nailing flange until parallel with fireplace face. Do not bend toward fireplace face.
4. Position framing stud against the 1/4” (6 mm) stand-off located on the backside of the nailing flange and secure with nails
or screws.
PREPARE THE FIREPLACE
NOTE: Depending on facing material, tabs can be adjusted forward or back up to 1/2” (13 mm).
CAUTION: NEVER PERMANENTLY REMOVE THESE ASSEMBLIES FROM THE FIREPLACE - THEY MUST BE SECURED
IN PLACE REGARDLESS OF FINISH MATERIAL USED.
STAND-OFF
NAILING FLANGE
FRAMING STUD
NAILING FLANGE
FRAMING STUD
1/4” (6mm)
CLEARANCE
FRONT VIEW
PAGE 12
TOP VIEW
AS SHIPPED
NAILING FLANGES
INSTALLED
1/4” (6mm)
CLEARANCE

MINIMUM FINISHED OPENING DIMENSIONS
FRAMING
WALL ENCLOSURE ROUGH OPENING
IMPORTANT: Framing dimensions should allow for wall covering thickness and fireplace facing materials. If
using a hearth, adjust rough opening size as necessary to maintain at least the minimum clearance requirements.
(APPLIES TO BOTH HORIZONTAL AND VERTICAL VENTING TERMINATIONS)
42”(1067 mm) High x 36-3/8”(924 mm) Wide x 15-3/4” (400 mm) Deep.
1/4” (6 mm) clearance at back and sides of fireplace must be maintained.
NOTE: Provide adequate clearance in front of fireplace to operate lower grill, open and close optional
decorative doors / full door faces, access the control valve, installation of gas line, fan, etc.
PAGE 13
IMPORTANT: NON-COMBUSTIBLE FACING MATERIAL MAY BE APPLIED OVER THE FACE. TO
PREVENT THE FACING MATERIAL FROM FALLING OFF DUE TO EXPANSION OF THE FACE WHEN
HEATED, DO NOT ATTACH FACING MATERIAL DIRECTLY TO THE FIREPLACE FACE. DO NOT
OBSTRUCT THE FLOW OF VENTILATION AIR.
WARNING: DO NOT OBSTRUCT UPPER AND LOWER GRILL OPENINGS. ROOM AIR ENTERS
THROUGH THE LOWER PASSAGE, IS HEATED AND EXITS THROUGH THE UPPER PASSAGE.
BLOCKING THESE PASSAGES MAY RESULT IN OVERHEATING, CREATING A POTENTIALLY
HAZARDOUS SITUATION.
12-1/2” (318 mm) H x 10-7/8” (277 mm) W opening
(required for horizontal terminations)
42”
(1067 mm)
36-3/8”
(924 mm)

Determine the exact position of your fireplace, including hearth height, width, and depth, (if applicable). If possible, place
fireplace in such a manner that the vent termination will be placed between two studs, eliminating the need for additional
framing.
Frame a 12-1/2” (318 mm) high (H) x 10-7/8” (276 mm) wide
(W) opening on the exterior wall for the chimney termination.
This opening size includes the required 3” (76 mm) top
clearance and 1” (25 mm) sides and bottom clearances for
approved rigid vent systems and the Kozy Heat #800 series
flexible vent system.
CAUTION: Cold air transfer area. The surrounding fireplace chase must comply with all clearances as
outlined in this manual and be constructed in compliance with local building codes. Outside walls should be
insulated to prevent cold air from entering room.
CAUTION: Due to high temperatures, this fireplace should be located
out of traffic areas and away from furniture and draperies.
HORIZONTAL TERMINATIONS
Follow vent pipe manufacturer‟s installation instructions for
vertical terminations. A minimum 1” (25 mm) clearance on all
sides of vertical vent pipe must be maintained.
VERTICAL TERMINATIONS
MINIMUM HORIZONTAL FRAMING DIMENSIONS
VENT PIPE TOP (A) FRAMED OPENING TOP (B)
RIGID PIPE 42-1/8” (1070 mm) 45-1/8” (1146 mm)
FLEX PIPE 49” (1245 mm) 52” (1321 mm)
VENTING
FRAMING
WARNING: Install fireplace on hard metal or
wood surface extending the full width and
depth of fireplace. Minimum platform size:
35-7/8” (911 mm) wide x 15-1/4” (387 mm) deep.
FIRE HAZARD: Do NOT install directly on
carpeting, vinyl, or any combustible material other
than wood.
IMPORTANT: Vent cap location must be in
compliance with the guidelines on page #35
of this manual.
If masonry is to be used (optional), prepare the necessary foundation for the masonry load. When masonry construction is
being used, a lintel must be used over the top of the fireplace to support the added weight.
Build the hearth to the desired size and height. If a
hearth extension is desired, combustible material may
be used.
NOTE: Consider height of hearth
finish material (stone, brick, etc.) when
building fireplace platform. The
bottom of the fireplace must be level
with finished hearth to allow for lower
grill operation and proper fit of
optional decorative full door faces.
PAGE 14
The included Horizontal Vent Heat Shield
is not used for vertical configurations.

IMPORTANT: KOZY HEAT WALL
THIMBLE PASS-THRU (#800-WPT)
MUST BE USED ON ALL HORIZONTAL
VENT RUNS USING 5” x 8” VENTING.
FOLLOW INSTRUCTIONS ON PAGE 23
OF THIS INSTALLATION MANUAL.
TYPICAL INSTALLATION OPTIONS
TYPICAL CORNER INSTALLATION
TYPICAL HORIZONTAL INSTALLATION
TYPICAL VERTICAL INSTALLATION
IMPORTANT: THE HORIZONTAL
HEAT SHIELD INCLUDED WITH
THIS FIREPLACE MUST BE
INSTALLED WHEN USING A 90-
DEGREE ELBOW DIRECTLY OFF
THE TOP OF UNIT TO HORIZON-
TALLY POSITION THE VENT
SYSTEM. THIS INCLUDES ANY
CORNER INSTALLATION.
1/4” (6 mm)
clearance
IMPORTANT: The illustration
below shows the Horizontal Vent
Heat Shield installed. All other
illustrations on this page have
the Horizontal Vent Heat Shield
removed for clarity purposes only.
PAGE 15
1/4” (6 mm)
Clearance at back
15-1/2”
(394 mm)
36-3/8”
(924 mm)
29-78”
(759 mm)
42-1/2”
(1073 mm)
59-3/4”
(1517 mm)
1/4” (6 mm)
Clearance at back
15-1/2”
(394 mm)
36-3/8”
(924 mm)
NOTE: STAND-OFF HEAT
SHIELD NOT SHOWN FOR
CLARITY PURPOSES ONLY.

10"
254mm
22"
559mm
16"
406mm
3/4"
19mm
4"
102mm
14"
356mm
MANTEL REQUIREMENTS
PAGE 16
HORIZONTAL VENT
HEAT SHIELD
WARNING:
NON-COMBUSTIBLE ZONE:
STAND-OFFS PROVIDE THE 10” (254 mm)
MINIMUM CLEARANCE TO HEADER. USE
ONLY NON-COMBUSTIBLE MATERIAL IN
THIS AREA FOR THE ENTIRE WIDTH OF
FIREPLACE. DO NOT USE WOOD, SHEET
ROCK ETC. IN THIS ZONE.
NOTE:
OTHER CLEARANCES APPLY. THESE
CLEARANCES MUST BE MAINTAINED.
NON-COMBUSTIBLE ZONE:
NO COMBUSTIBLE MATERIALS
ALLOWED ON TOP OF FIREPLACE
WITHIN THE SHADED AREA FOR
THE ENTIRE WIDTH AND DEPTH
OF THE FIREPLACE WITH THE
EXCEPTION OF THE HEADER.
BACKSIDE OF HEADER MUST BE
NO MORE THAN 2-1/4” (57 mm)
FROM THE FRONT OF THE
FIREPLACE.
MANTEL LEG PROJECTION CHART
Clearance to mantel legs or wall
projections (acceptable on both
sides of opening).

GLASS FRAME ASSEMBLY
REMOVE GLASS FRAME ASSEMBLY
A. Locate the spring-loaded handles securing glass frame assembly at the top & bottom of firebox.
CAUTION: TO PREVENT THE GLASS FRAME
ASSEMBLY FROM FALLING FROM THE
FIREPLACE AND BECOMING DAMAGED, FOLLOW
THESE INSTRUCTIONS EXACTLY WHEN
REMOVING GLASS FRAME ASSEMBLY.
B. Pull bottom handles out and „down‟ to release glass frame assembly bottom.
C. Pull top handles out and „up‟ to release glass frame assembly top.
D. Remove glass frame assembly from fireplace.
INSTALL GLASS FRAME ASSEMBLY
A. Place glass frame assembly onto fireplace front.
B. Pull top handles out and „down‟ to secure glass frame assembly top.
C. Pull bottom handles out and „up‟ to secure glass frame assembly bottom.
CAUTION: TO PREVENT GLASS FRAME
ASSEMBLY FROM FALLING OFF WHEN
INSTALLING, SECURE TOP GLASS LATCH
BRACKETS BEFORE SECURING BOTTOM
BRACKETS.
WARNING: DO NOT REMOVE
GLASS ASSEMBLY WHEN HOT!
WARNING: DO NOT OPERATE
THIS FIREPLACE WITH THE
GLASS REMOVED, CRACKED
OR BROKEN. REPLACEMENT
OF GLASS FRAME ASSEMBLY,
PART #DSL-057T SHOULD BE
DONE BY A LICENSED OR
QUALIFIED SERVICE PERSON.
PAGE 17
Pull latches „out‟ and „down‟ to release glass
frame assembly bottom.
Pull latches „out‟ and „up‟ to attach glass frame
assembly bottom.
Pull latches „out‟ and „up‟ to release glass frame
assembly top.
Pull latches „out‟ and „down‟ to attach glass
frame assembly top.

INSTALLATION OF THIS FAN SHOULD BE DONE ONLY BY A QUALIFIED INSTALLER
IMPORTANT: If installing a fan, it is easier to complete before the millivolt board is connected to the
gas line. Wiring must be done before enclosing fireplace sides. An electrical box and romex connector
are pre-installed on a removable panel on the right side of fireplace. A receptacle / speed control
assembly and (3) wire nuts are included in the fireplace components packet.
The optional fan kit #TMT-028 includes:
(1) 75 CFM fan with temperature control switch and 4 ft. (1219 mm) fan cord
(2) 1/4” nuts
NOTE: Code approved line voltage wiring 14 gauge or better must be used when wiring this assembly.
Refer local electrical codes for specific requirements.
WARNING: THIS APPLIANCE IS EQUIPPED WITH A THREE-PRONG (GROUNDING) PLUG
FOR PROTECTION AGAINST SHOCK HAZARD AND SHOULD BE PLUGGED DIRECTLY INTO
A PROPERLY GROUNDED THREE-PRONG RECEPTACLE. DO NOT CUT OR REMOVE THE
GROUNDING PRONG FROM THIS PLUG.
Incoming 115V wiring
60Hz
115V
Temperature Switch:
Magnetically attaches to bottom of
firebox.
Speed Control / Receptacle Assembly
Electrical Box
The following components must be removed from the fireplace prior to installation of this fan. Refer to the corresponding
pages in this installation manual for assistance if necessary.
A. Upper hood, upper louver & lower grill, if installed. Page 43.
B. Glass assembly. Page 17.
OPTIONAL FAN INSTALLATION (DSL-36)
WARNING: MAKE SURE HOUSEHOLD
BREAKER IS SHUT OFF PRIOR TO WORKING
ON ANY ELECTRICAL LINES.
PAGE 18

1. Insert fan through the lower grill opening on left side of gas
valve. Align mounting slots in the fan bracket onto the
mounting studs located at the fireplace rear. Secure with nuts.
2. From inside the lower right grill opening, loosen screw
securing the removable access panel (with electrical box &
romex connector installed). Remov e panel.
3. Insert 115V wiring (with ground) through romex connector
and wire to the speed control / receptacle assembly matching
the black (hot) white (neutral) and green (ground) wires to
the corresponding wires on the speed control / receptacle
assembly.
4. Secure speed control / receptacle assembly to the electrical
box with the (2) screws provided.
5. Re-install electrical access panel. Tighten screw.
6. Attach the temperature control switch to the bottom of
firebox.
7. Plug cord into the electrical box receptacle.
8. Turn speed control counter-clockwise until it „clicks‟. This
is the „OFF‟ position.
9. Turn speed control „ON‟ by turning the knob clockwise past
the „click‟ - this is the highest setting.
10. Re-install glass assembly.
11. Re-install lower grill, upper louver & upper hood. Refer to
page 43 of this installation manual if necessary.
Before adjusting the temperature control switch, unplug
the 3-prong plug on the fan cord from the receptacle.
Adjust position of the temperature control switch to a
warmer location under the firebox to turn fan „ON‟ sooner
or move it to a cooler location under firebox to turn the fan
„ON‟ later. The fan will turn on when the sensor in the
temperature control switch reaches 110° F and will turn
„OFF‟ when the sensor reaches 90° F. After adjustment,
plug the 3-prong plug on fan cord into the receptacle.
NOTE: This fan will not operate unless the speed
control has been turned „ON‟ and sufficient heat has
been applied to the temperature control switch. The
fan will turn „ON‟ and „OFF‟ automatically as the
fireplace heats and cools. Adjust fan to desired speed
while it is running.
OPTIONAL FAN INSTALLATION (DSL-36)
NOTE: Illustrations shown without millivolt
board for clarity purposes only.
PAGE 19
NOTE: Speed control / receptacle assembly &
(3) wire nuts are included in the fireplace
components packet.
NOTE: This appliance must be electrically grounded
and connected in accordance with local codes, or in
the absence of local codes, with the National Electrical
Code, ANSI/NFPA 70 Current Edition, or the
Canadian electrical Code CSA C22.1.
TEMPERATURE CONTROL SWITCH POSITION
Temperature Control Switch (Looking through lower grill opening).