DIRECT VENT FIREPLACE INSERT
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 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.
October - 2009
CSK-335-REV-08
Shown with Young Pattern Full Door Shroud
A manufactured home (USA only) or mobile home OEM installation must conform with the Manufac-
tured Home Construction and Safety Standard, Title 24 CFR, Part 3280, or when such a standard is
not applicable, the Standard for Manufactured Home Installations, ANSI/NCSBCS A225.1, or Stan-
dard for Gas Equipped Recreational Vehicles and Mobile Housing, CSA Z240.4
This appliance may be installed in an aftermarket permanently located, manufactured (mobile) home,
where not prohibited by local codes.
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
CONTENTS
Table of Contents 2
SAFETY INFORMATION
Safety Information 3
FEATURES
Features 4
COMMONWEALTH OF MASSACHUSETTS INFORMATION
Commonwealth of Massachusetts Information 5
SPECIFICATIONS
Fireplace Dimensions 6
Clearances 6
Components List 7
Additional Components Required 7
Placement Clearance Requirements 7
EXISTING FIREPLACE SPECIFICATIONS
Existing Fireplace Requirements 8
PREPARE EXISTING FIREPLACE
Existing Fireplace Minimum Opening Requirements 9
Prepare Existing Fireplace 9
FAN DIRECT WIRE INSTALLATION
CSK-335 /CSK-335-RAD Fan Direct Wire Installation 10
CSK-335-RF Fan Direct Wire Installation 11
THERMOSTAT / WALL SWITCH / REMOTE - CSK-335
Thermostat / Wall Switch / Remote - CSK-335 12
GLASS FRAME ASSEMBLY
Glass Frame Assembly Removal 13
Glass Frame Assembly Installation 13
INSTALLATION
Approved Venting 14
Combustion Air Venting Options 14
Air Duct Removal 14
Kozy Heat #816-CL Co-Linear Vent System 15
Run Vent System Through Existing Chimney 16
Connect Vent System to Air Duct 17
Position Fireplace Insert 17
GAS LINE CONNECTION
Gas Line Connection 18
Check Millivolt Board Installation 18
COMPLETE FAN WIRING INSTALLATION
CSK-335 / CSK-335-RAD Complete Fan Wiring Installation 19
CSK-335-RF Complete Fan Wiring Installation 19
3 PIECE SHROUD ASSEMBLY AND INSTALLATION
3 Piece Shroud Assembly and Installation 20
LOG SET INSTALLATION
Log Set Installation 21
MILLIVOLT BOARD REMOVAL
Millivolt Board Removal 22
MILLIVOLT BOARD INSTALLATION
Millivolt Board Installation 23
CSK-335 OPERATING INSTRUCTIONS
CSK-335 / CSK-335-RAD Valve and Pilot Assembly Components 24
CSK-335 / CSK-335-RAD Lighting and Shutdown Instructions 25-27
CSK-335 / CSK-335-RAD Pressure Testing 28
CSK-335-RF OPERATING INSTRUCTIONS
CSK-335-RF Valve and Pilot Assembly Components 29
CSK-335-RF Lighting and Shutdown Instructions 30-32
CSK-335-RF Pressure Testing 33
CSK-335-RF Remote Receiver Functions 34-35
FINALIZING THE INSTALLATION
Flame Appearance 36
To Adjust Venturi 36
MAINTENANCE
Maintenance 37
TROUBLESHOOTING (CSK-335)
Troubleshooting (CSK-335 / CSK-335-RAD ) 38-40
TROUBLESHOOTING (CSK-335-RF)
RF Remote Troubleshooting (CSK-335-RF) 41
Troubleshooting (CSK-335-RF) 42-43
REPLACEMENT PARTS LIST
Replacement Parts List 44
WARRANTY
Warranty 45-46
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.
This fireplace insert is to be installed into a solid fuel masonry or factory built non-combustible fire-
place that has been installed in accordance with the National, Provincial, State and local building
codes.
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 #CXL-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, Portland, 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 3
High efficiency
High quality lifetime glass
18” x 32” (457 mm x 813 mm)
Quick latch glass frame assembly
Co-linear vent system - 3” combustion air / 3” exhaust
Innovative vent connection system
Engineer-designed burner system
High - Low regulator
Modulating valve system w/ fan and flame adjustment, remote
control (Kozy Kontrol)*
**Automatic fan kit (2) - 75 CFM
Refractory brick lining
(2) hoods / lower grill (black)
Minnesota Energy Code compliant to 50 pascals
*Standard on CSK-335-RF models
**Standard on CSK-335 and CSK-335-RF models
Red brick refractory
Standard size or custom sized (3 & 4 pc.) shrouds
Surrounds
Flex vent adaptor kit
Remote control* or thermostat remote control
Wall mount thermostat / wireless wall mount thermostat
Decorative full door faces in various styles and finishes
Mission design doors in various finishes
Various cabinet & flush surrounds
Fan Kit (CSK-335-RAD Models)
Speed Control / Receptacle Assembly (CSK-335-RAD Models)
*Standard on RF models
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)
155 lbs. (70.31 kg)
FEATURES
STANDARD FEATURES
OPTIONAL FEATURES
WEIGHT
SAFETY FEATURES
PAGE 4
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 in-
stalling plumber or gas-fitter shall observe that a battery operated or hard wired carbon monoxide detector is installed on each additional level of the dwell-
ing, 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
services 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 provisions 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 ga s fueled equipment in-
stalled in a room or structure separate from the dwelling, building or structure used in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED
When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system design or venting system compo-
nents 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 identi-
fies “special venting systems”, the following requirements shall be satisfied by the manufacturer:
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 de-
tailed 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 appliance or equipment at the completion of the installation.
PAGE 5
TOP
FRONT
RIGHT
LEFT
24
3
8
"
619mm
32"
813mm
18
1
8
"
460mm
23"
584mm
33
3
8
"
848mm
11"
279mm
5"
127mm
16"
406mm
17
1
4
"
438mm
5
1
8
"
130mm
9
1
2
"
241mm
1
7
8
"
48mm
TOP
FRONT
RIGHT
LEFT
24
3
8
"
619mm
32"
813mm
18
1
8
"
460mm
23"
584mm
33
3
8
"
848mm
11"
279mm
5"
127mm
16"
406mm
17
1
4
"
438mm
5
1
8
"
130mm
9
1
2
"
241mm
1
7
8
"
48mm
TOP
FRONT
RIGHT
LEFT
24
3
8
"
619mm
32"
813mm
18
1
8
"
460mm
23"
584mm
33
3
8
"
848mm
11"
279mm
5"
127mm
16"
406mm
17
1
4
"
438mm
5
1
8
"
130mm
9
1
2
"
241mm
1
7
8
"
48mm
FIREPLACE DIMENSIONS
DESCRIPTION Height Width Back Width Depth Back Height Back to Elec.
Access
Back to Gas
Line Access
Front to Vent
Center
Back to Vent
Center
FIREPLACE
DIMENSIONS
INCHES 23 33-3/8 24-3/8 16 17-1/4 9-1/2 5-1/8 11 5
MILLIMETERS 876 1038 743 406 438 241 130 279 127
SPECIFICATIONS
MINIMUM CLEARANCES TO COMBUSTIBLES
Insert to sidewall: 12” (305 mm)
Insert top to 9” (229 mm) mantel: 16” (406 mm)
Insert top to 3/4” (20 mm) trim: 12” (305 mm)
Insert bottom to combustible floor in front: 6” (152 mm)
Insert bottom to combustible floor underneath: 0” (0 mm)
PAGE 6
WARNING: FAILURE TO POSITION THE PARTS IN ACCORDANCE WITH THESE DIAGRAMS OR FAILURE TO USE
ONLY PARTS SPECIFICALLY APPROVED WITH THIS APPLIANCE MAY RESULT IN PROPERTY DAMAGE OR
PERSONAL INJURY.
1. Fireplace insert
2. Spring-loaded latch glass assembly
3. Millivolt board with burner cover
4. Co-linear air duct
5. Log set (see page 21)
6. Refractory panels
Model CSK-335 includes 150 CFM fan with limit
switch and speed control.
Model CSK-335-RF includes modulating valve on
millivolt board, fan kit and remote control.
TOP
FRONT
RIGHT
LEFT
24
3
8
"
619mm
32"
813mm
18
1
8
"
460mm
23"
584mm
33
3
8
"
848mm
11"
279mm
5"
127mm
16"
406mm
17
1
4
"
438mm
5
1
8
"
130mm
9
1
2
"
241mm
1
7
8
"
48mm
PLACEMENT CLEARANCE REQUIREMENTS
This fireplace must be installed on a level surface capable of supporting the fireplace and venting.
This fireplace insert is to be installed into a solid fuel masonry or factory built non-combustible fireplace that has been installed in
accordance with the National, Provincial, State and local building codes.
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
PAGE 7
MODEL #CSK-335 COMPONENTS LIST
(#CXL-770) - Millivolt Board Assembly with 18” Flexible
Gas Line attached
(#700-203) - Manual Gas Shut-off Valve
(#CXL-135) - Burner Assembly
(#CXL-G900) - Refractory Set
(#CXL-50A) - Log Package
(#CXL-057T) - Glass Frame Assembly
(#OCK-H50L) - LP Conversion Kit
(#816-CL1) - Co-Linear Air Duct
(#CSK-028) - Fan Kit (2)-75 CFM
(#500-CXL) - Grill Assembly
MODEL #CSK-335-RF COMPONENTS
(#CXL-800-RF) - Millivolt Board Assembly with 18” Flexible
Gas Line attached
(#700-203) - Manual Gas Shut-off Valve
(#CXL-135) - Burner Assembly
(#CXL-G900) - Refractory Set
(#CXL-50A) - Log Package
(#RF-028) - RF Fan Kit
(#CXL-057T) - Glass Frame Assembly
(#OCK-H50L-RF) - LP Conversion Kit
(#700-108) - Remote control
(#816-CL1) - Co-Linear Air Chute
(#500-CXL) - Grill Assembly
ADDITIONAL COMPONENTS REQUIRED
Vent System; Part # 816-CL: For use with minimum 6” x 8” I.D. masonry or 7” I.D. Class A metal chimneys - Includes 12 ft. (3.66 m)
compressed, expandable to 35 ft (10.67 m) co-linear 3” x 3” flexible chimney, and termination cap.
Other approved venting: ICC, Selkirk, American Metals, Simpson Dura-Vent
Shroud - 3 pc & 4 pc.: Standard shrouds are available for this insert and will fit most applications. Custom shrouds may be ordered on a
non-returnable basis. When ordering a custom shroud, please specify the existing fireplace front opening height and
width. An upper hood and lower grill are included with fireplace.
or
Blank Shrouds - 3 & 4 pc.: Blank shrouds are available for on-site custom fit applications and are sized to the opening after the insert has
been installed. The interior perimeter is properly sized to fit onto the insert. The outer perimeter must be cut,
formed and finished (painted). An upper hood and lower grill are included with fireplace.
or
Full Door Shrouds: Full door decorative shrouds are available for this insert and are used in place of a standard or blank shroud. An upper
hood and lower grill are included with fireplace.
MODEL #CSK-335-RAD COMPONENTS LIST
Refer to Model #CSK-335 list.
All components same with the exception of the fan kit.
Model #CSK-335-RAD does not include a fan kit.
EXISTING FIREPLACE SPECIFICATIONS
THIS INSERT IS APPROVED FOR INSTALLATION IN MASONRY AND FACTORY-BUILT SOLID FUEL BURNING FIREPLACES.
EXISTING FIREPLACE REQUIREMENTS
The existing fireplace & chimney must be clean and in good working order and constructed of non-combustible materials.
A gas line must be able to be installed to the insert.
Provisions made to provide electrical power to operate the insert fan and thermostatic control (if used).
Any chimney clean-outs must fit properly.
Existing Chimney must be comprised of one of the following: Class „A‟ metal chimney: 7” minimum inside diameter.
Masonry Chimney: 6" x 8" minimum inside diameter.
Existing Chimney Height: Minimum: 12 ft. (3.66m)
Maximum: 35 ft. (10.67m)
Determine length of your existing chimney:
1. Remove and discard existing chimney cap.
2. With one person at the fireplace and another person at the top of chimney,
measure from fireplace base to the top of chimney.
Subtract 23” (584 mm) (height of insert).
This is the total length of co-linear flexible aluminum you will require.
MEASUREMENT FROM FIREPLACE BASE TO TOP OF CHIMNEY:______________
LESS 23" (584 mm) (HEIGHT OF INSERT): -23" (584 mm) .
TOTAL CHIMNEY LENGTH REQUIRED: ______________
NOTE: It is helpful to have two people complete the
next step in determining chimney height.
MIN. 12 ft. (3.66 m)
MAX. 35 ft. (10.67 m)
CAUTION: THIS APPLIANCE MUST NOT BE CONNECTED TO A CHIMNEY
FLUE SERVING A SEPARATE SOLID-FUEL BURNING APPLIANCE.
PAGE 8
EXISTING FIREPLACE MINIMUM OPENING REQUIREMENTS
(A) Height: 23-1/2" (597 mm)
(B) Front Width : 33-1/2" (851 mm)
(C) Depth: 16-1/2" (419 mm)
(D) Back Width : 24-1/2" (622 mm)
All dimensions are minimum requirements
The firebrick (refractory), glass doors, screen rails, screen mesh and log grates can be removed in order to gain minimum gas
insert opening requirements.
Any smoke shelves, shields and baffles may be removed from firebox if attached with mechanical fasteners.
WARNING: CUTTING ANY SHEET-METAL PARTS OF THE FIREPLACE, IN WHICH THE GAS FIREPLACE IS TO BE
INSTALLED, IS PROHIBITED.
PREPARE THE EXISTING FIREPLACE
PAGE 9
1. The refractory, glass doors, screen rails, screen mesh and log grates may be removed from existing fireplace before installing this gas
fireplace insert.
2. Any smoke shelves, shields and baffles may be removed if attached by mechanical fasteners.
3. If necessary, remove firebrick on sides and back of the existing fireplace to obtain at least the minimum opening requirements listed
above.
4. The fireplace flue damper can be fully blocked open or removed for installation of this gas fireplace insert.
5. Remove existing chimney cap.
6. Clean chimney and inside of fireplace to prevent creosote smell from entering the home.
7. Place „THIS UNIT HAS BEEN MODIFIED‟ label in the bottom of existing firebox so it will be visible if this gas fireplace insert is
removed.
8. Run electrical wiring if hard wiring to the pre-installed electrical box in the insert if desired. See „FAN DIRECT WIRE INSTALLA-
TION‟ instructions on following pages.
9. Run any electrical wiring needed if insert is to be run by a thermostat.
WARNING: CUTTING ANY SHEET-METAL PARTS OF THE FIREPLACE, IN WHICH THE GAS FIREPLACE IS TO BE
INSTALLED, IS PROHIBITED.
PREPARE THE EXISTING FIREPLACE
PAGE 10
Incoming wiring
110V-120V
FAN DIRECT WIRE INSTALLATION
#CSK-335
#CSK-335-RAD OPTIONAL FAN KIT #CSK-028
CSK-335:This fireplace insert comes complete with a fan and thermostatic control switch already installed. A speed control, receptacle,
and 8 ft. (2.44 m) fan cord have been installed, wired and mounted in a removable electrical box panel on the right side of the fireplace. If
wiring to the pre-installed electrical box is desired, the wiring should be run prior to permanently setting the insert in place and connecting
the vent system.
NOTE: If this fireplace insert is being installed in the minimum opening dimensions,
the wiring may need to be completed after the fireplace insert is set in place.
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. Do not allow any excess fan cord to touch the fireplace.
NOTE: Code approved line voltage wiring 14 gauge or better must be used when
wiring this assembly. Refer to your local electrical codes for specific requirements in
your area.
Speed Control / Receptacle Assembly
Temperature Switch:
Magnetically attaches to bottom of
firebox.
Electrical Box
60Hz
110V-120V
Ground Wire
DIRECT WIRE INSTALLATION:
NOTE: The cord must be removed and wiring disassembled.
Insert 110V-120V wiring (with ground) through the romex connector and
wire to speed control / receptacle assembly, matching black, white & green
(ground) wires to the corresponding wires on the speed control / receptacle
assembly.
DIRECT WIRE INSTALLATION
1. Loosen (but do not remove) screw securing removable access panel (with electrical box & romex connector installed) from the
right side of fireplace. Remove access panel.
2. Remove (2) screws securing speed control / receptacle to expose wiring.
3. Remove existing cord and insert 110V-120V wiring (with ground) through romex connector, wiring to speed control / receptacle
assembly, matching black (hot), white (neutral), and green (ground) wire to the corresponding wires on speed control / receptacle
assembly. NOTE: The (3) wire nuts obtained when removing existing cord may be used for this purpose.
4. Secure speed control / receptacle assembly into the electrical box with (2) screws provided.
Refer to page 19 for instructions on completing fan wiring after insert has been installed.
This appliance, when installed, must be electrically grounded in accordance with local codes, or in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70, or the Canadian Electrical Codes, CSA C22.1
DIRECT WIRE CONNECTION MUST BE PERFORMED BY A QUALIFIED ELECTRICIAN.
CSK-335-RAD: A speed control, receptacle, with 8 ft. (2.44 m) fan cord wired and mounted in an electrical box panel (#600-083C) is
available. If hardwiring to the electrical box is desired, the wiring should be run prior to permanently setting the insert in place and con-
necting the vent system.
CSK-335-RF (only) FAN DIRECT WIRE INSTALLATION
#CSK-335-RF (ONLY) INSTRUCTIONS
A receptacle and 8 ft. (2.44m) fan cord have been installed, wired, and mounted in a removable electrical box panel on the right side of the
fireplace. If direct wiring to the pre-installed electrical box is desired, wiring should be completed prior to permanently positioning insert
and connecting the vent system.
NOTE: If this fireplace insert is being installed in the minimum opening dimensions,
the wiring may need to be completed after the fireplace insert is set in place.
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. Do not allow any excess fan cord to touch the fireplace.
NOTE: Code approved line voltage wiring 14 gauge or better must be used when
wiring this assembly. Refer to your local electrical codes for specific requirements in
your area.
DIRECT WIRE INSTALLATION:
NOTE: The cord must be removed and wiring disassembled.
Insert 110V-120V wiring (with ground) through the romex connector and
wire to speed control / receptacle assembly, matching black, white & green
(ground) wires to corresponding wires on the receptacle.
DIRECT WIRE CONNECTION MUST BE PERFORMED BY A QUALIFIED ELECTRICIAN.
IMPORTANT: A fan assembly is pre-installed and wired to the RF gas valve in
CSK-335-RF models.
Gas Valve (RF)
Wires connect to valve
Wires connect
to fan cord
Electrical Box w/ Romex
connector
Receptacle & Cover
60Hz
110V-120V
DIRECT WIRE INSTALLATION
1. Loosen (but do not remove) screw securing removable
access panel (with electrical box & romex connector installed)
from the right side of fireplace. Remove access panel.
2. Remove (2) screws securing speed control / receptacle
to expose wiring.
3. Remove existing cord and insert 110V-120V wiring
(with ground) through romex connector, wiring to
speed control / receptacle assembly, matching black (hot),
white (neutral), and green (ground) wire to the corresponding
wires on speed control / receptacle assembly.
NOTE: The (3) wire nuts obtained when removing existing
cord may be used for this purpose.
4. Secure speed control / receptacle assembly into the electrical
box with (2) screws provided.
Refer to page 19 for instruction on completing fan wiring after insert has been installed.
This appliance, when installed, must be electrically grounded in accordance with local codes, or in the absence of local codes, with
the National Electrical Code, ANSI/NFPA 70, or the Canadian Electrical Codes, CSA C22.1
Incoming wiring
110V-120V
PAGE 11
CAUTION: DO NOT CONNECT HIGH VOLTAGE
(115V) WIRE TO THE GAS VALVE!
If desired, a thermostat (wireless style also available), wall switch,
or remote control assembly may be used to turn the fireplace „OFF‟
and „ON‟. Only ONE of these may be installed. Follow instructions
included with each assembly.
WALL SWITCH / THERMOSTAT:
Run low-voltage (thermostat) wires from terminals on the gas valve to
the desired location of wall switch or thermostat.
Attach the appropriate connectors to wall switch / thermostat wires
and connect to the top and bottom terminals marked TH / TPTH on
the gas valve.
REMOTE CONTROL:
Follow instructions included with the remote control.
IMPORTANT: The insulated cover included with the remote
control must be placed over the remote receiver to prevent
overheating.
IMPORTANT: If ON/OFF rocker switch wires are not
disconnected, the ON/OFF rocker switch on the millivolt
board must be in the „OFF‟ position for proper operation
of any of these components.
If rocker switch is „ON‟, the fireplace burner will operate until it is
turned „OFF‟ by the rocker switch. A wall switch, thermostat, or
remote control will not turn the fireplace „OFF‟ when it has been
turned „ON‟ by the rocker switch.
NOTE: The fireplace must be turned „ON‟ and „OFF‟
by the same method. For example: If fireplace is turned
„ON‟ by the remote control, it must be turned „OFF‟ by
the remote control.
Remote Control Wiring Diagram
Thermostat Wiring Diagram
THERMOSTAT / WALL SWITCH / REMOTE (CSK-335 and CSK-335-RAD only)
NOTE: INSTALLATION OF THERMOSTAT OR WALL SWITCH
SHOULD ONLY BE DONE BY A QUALIFIED INSTALLER.
PAGE 12
OPTIONAL:
Disconnect ON/OFF rocker
switch wires from gas valve.
GLASS FRAME ASSEMBLY
REMOVE GLASS FRAME ASSEMBLY
A. Locate the spring-loaded latches securing glass frame assembly at bottom of firebox.
B. Pull bottom latches out and „down‟ to release glass frame assembly bottom.
C. Lift glass frame assembly up off tabs located at top of firebox.
INSTALL GLASS FRAME ASSEMBLY
A. Align slots at top of glass frame assembly over tabs at top of firebox while lowering bottom of glass frame assembly into position.
B. Pull bottom latches out and „up‟ to secure glass frame assembly bottom.
WARNING: DO NOT OPERATE THIS FIREPLACE WITH THE GLASS REMOVED, CRACKED OR BROKEN. REPLACEMENT OF GLASS FRAME
ASSEMBLY, #CXL-057T SHOULD BE DONE BY A LICENSED OR QUALIFIED SERVICE PERSON.
WARNING: DO NOT REMOVE GLASS ASSEMBLY WHEN HOT!
FIREBOX TABS / GLASS FRAME ASSEMBLY SLOTS
GLASS FRAME ASSEMBLY LATCHES
PAGE 13
Remove air duct, located at the top of insert, by sliding it back out
of the channel. Follow instructions on following pages for vent
system attachment to air duct.
INSTALLATION
AIR DUCT REMOVAL
VENT SYSTEM INSTALLATION
Kozy Heat #816-CL Co-Linear Vent System. Follow instructions on following pages.
ICC
Selkirk
American Metals
Simpson Dura-Vent
Follow instructions included from vent pipe manufacturer as well as the venting requirements as outlined in this installation manual.
APPROVED VENTING
IMPORTANT: ALL STEPS AS OUTLINED IN „PREPARE THE EXISTING FIREPLACE‟ MUST BE COMPLETED BEFORE
CONTINUING WITH THIS INSTALLATION.
PAGE 14
OPTION 1: FULL CONNECTION: The combustion air intake pipe is run the entire chimney length and connected to the
termination cap.
OPTION 2: STUB VENTING: A 3” combustion air intake pipe is extended a minimum of 4 ft. (1.22 m) past the damper opening
and into existing chimney. It is not connected to the termination cap.
KOZY HEAT #816-CL CO-LINEAR VENT SYSTEM
The co-linear pipes included in this vent system are designed to extend up to 35 ft. (10.67m)
IMPORTANT: The 3" exhaust pipe can be identified by the red marking. It is imperative
for proper operation of this insert that the exhaust and combustion air
pipes be connected to the correct collar both on the termination kit and air
duct on the insert.
A. Carefully extend the 3” exhaust and combustion air intake pipes to equal the total chimney length required.
B. 1. If using „full connection‟ method:
Slide 3" intake pipe (end without collar) over collar on termination cap. Secure with 3 self-tapping screws (provided).
2. Place a bead of sealant around inner edge at end of 3" exhaust pipe (without collar / red marking) and slide onto
corresponding collar on termination cap (collar with label). Secure with 3 self-tapping screws (provided). Apply additional
sealant around joint to ensure a proper seal.
INTAKE COLLAR
NOTE: Collar extends through
bottom plate.
TERMINATION CAP
EXHAUST COLLAR
NOTE: Collar extends through
middle divider plate
IMPORTANT: INSTALL TERMINATION
CAP WITH EXHAUST COLLAR ON
RIGHT SIDE. THE EXHAUST COLLAR
ON FIREPLACE AIR DUCT IS ON THE
RIGHT SIDE.
SEALANT
SHEET METAL
SCREWS (3 TOTAL)
SEALANT
PAGE 15
NOTE: If using „stub‟ method for the combustion air pipe, extending it is not necessary.
Determine length needed from the air duct on insert (4 ft. (1.22 m) minimum) to
above the damper opening in the existing chimney. Remove excess combustion air
pipe from end without a collar. Continue with Step B. #2 below.
We strongly suggest wrapping the first 3 ft.(914 mm) of vent system below termination
cap with non-faced fiberglass insulation (secure with wire) before running it through the
existing chimney. This will prevent cold air from coming down the existing chimney.
DO NOT USE THIS METHOD IF YOU ARE STUBBING THE 3" COMBUSTION
AIR PIPE FROM BOTTOM OF EXISTING CHIMNEY!
NOTE: If offsets are present in existing chimney, it may be easier to place a
weighted rope around the end of each 3" pipe to guide them through it.
DO NOT ATTEMPT TO TIE ONE ROPE AROUND BOTH PIPES.
RUN VENT SYSTEM THROUGH EXISTING CHIMNEY
1. Guide rope, if used, and flexible pipe(s) down existing chimney. See figure at lower left.
2. To secure chimney termination cap to the existing chimney, apply a liberal bead of sealant (provided) around the top of existing chim-
ney. Set termination cap into position as instructed in installation manual included with chosen vent system .
OPTIONAL: #816-CL kits - Secure the termination cap to existing chimney with 2" self-tapping screws and anchor straps provided through
pilot holes located at the sides of termination cap.
3. From inside existing fireplace opening, CAREFULLY pull ropes down until 3" exhaust pipe and 3” combustion air intake (if using
„full connection method‟), are into existing fireplace.
STUB VENTING: From inside existing fireplace, insert a minimum of 4ft. (1.22m) of combustion air pipe (end without collar) past the
damper opening and into existing fireplace. See figure at lower right.
4. We strongly suggested placing non-faced fiberglass insulation between vent pipes and existing chimney to prevent heat loss up the
chimney, being careful not to block end pipe if using stub method.
Minimum 4 ft. (1.22m) section
of 3" combustion air flex pipe
DO NOT block pipe end
with insulation or any other
sealing materials
3" exhaust flex pipe
must be connected
to collar on
fireplace insert and
termination cap
Seal area around
vent pipes with
non-faced fiberglass
insulation
PAGE 16
CONNECT VENT SYSTEM TO AIR DUCT
1. Place air duct (previously removed from insert top, page 14)
into the existing fireplace opening.
2. Place a bead of sealant (provided) around 3” exhaust pipe
(red marking). Slide exhaust pipe inside 3" collar marked
„Exhaust‟ on the air duct. Secure with (3) ½" self-tapping
screws, provided. Apply additional sealant around the joint
to ensure an air tight seal.
3. Apply a liberal bead of sealant (provided) around 3” collar
on the air duct. Slide 3” combustion intake pipe over the
collar. Secure with (3) ½" self-tapping screws, provided. To
ensure an air-tight seal, apply additional sealant around the
joint.
POSITION FIREPLACE INSERT
1. Slide insert into fireplace opening.
2. Position air duct into channels located at top of insert. Slide air duct forward until seated.
3. Secure air duct to insert front with (2) 1/2” sheet
metal screws (included in components packet).
Shown without venting attached
for clarity purposes only
Secure with sheet metal screws
Leveling legs (2 per side)
4. If necessary, level insert by threading leveling bolts (included
in components packet) into nuts mounted in the bottom of
insert behind lower air passage - 2 each side.
Sheet metal screws
(3 total)
Sealant
PAGE 17
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