BuckMaster 36 User manual

MODEL 36
MAY BE INSTALLED AS A ZERO CLEARANCE FIREPLACE
OR WITH AN OPTIONALWOODEN SURROUND
WARNING: If the information in this manual is not followed exactly, a fire or
explosion may result causing property damage, personal injury or loss of life.
− Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this
or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
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.
This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is in-
stalled. Provisions for adequate combustion and ventilation air must be provided. Refer to
section “ Producing Adequate Air For Combustion And Ventilation” page 11.
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 of gas indicated on the rating plate. This appli-
ance is not convertible for use with other gases.
VENT-FREE
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
This appliance is intended for supplemental heating.
MANUFACTURED BY NEW BUCK CORPORATION
200 ETHAN ALLEN DRIVE,
SPRUCE PINE, N.C. 28777
www.buckstove.com Revised January 2013

TABLE OF CONTENTS
Safety Information Warnings........................................................................................................ 1
Installation (ZC)(WS)................................................................................................................... 4
Fireplace and Framing Dimensions (ZC) ..................................................................................... 5
Fireplace Clearances (ZC) ............................................................................................................ 6
Finishing Your Fireplace (ZC)...................................................................................................... 7
Mantel Profiles For Zero Clearance (ZC)..................................................................................... 8
Installation of Wooden Surround (WS)........................................................................................ 9
Producing Adequate Ventilation................................................................................................. 11
Air for combustion Ventilation From Inside Building ...............................................................13
Air for combustion Ventilation From Outdoors ......................................................................... 14
Gas Connection........................................................................................................................... 15
Gas Pressure Check..................................................................................................................... 16
Placement of Logs..................................................................................................................17-18
Lighting Instructions - ITT Millivolt Valve................................................................................ 19
Lighting Instructions - SIT Modulating or SIT Manual Valve................................................... 23
Lighting Instructions - SIT Millivolt Valve................................................................................ 27
Flame Check ............................................................................................................................... 31
Wiring Diagram.......................................................................................................................... 32
Important Safeguards.................................................................................................................. 34
Trouble Shooting ........................................................................................................................ 35
Service/Replacement Parts.......................................................................................................... 39
Warranty ..................................................................................................................................... 48
Owner Registration...................................................................................................... Back Cover

Page 1
SECTION I
SAFETY INFORMATION WARNINGS
IMPORTANT: READ THIS OWNER’S MANUAL CAREFULLY AND COMPLETELY
BEFORE TRYING TO ASSEMBLE, OPERATE, OR SERVICE APPLIANCE. IMPROPER
USE OF THESE LOGS CAN CAUSE SERIOUS INJURY OR DEATH FROM BURNS, FIRE,
EXPLOSION AND CARBON MONOXIDE POISONING.
Early signs of carbon monoxide poisoning resemble flu, with headaches, dizziness and/or
nausea. If you have these signs, heater may not be working properly. Get fresh air at once!
Have heater serviced.
Some people-pregnant women, persons with heart or lung disease, anemia, those under
influence of alcohol and those at high altitudes are more affected by carbon monoxide than
others.
CAUTION: Strong drafts, such as a ceiling fan placed directly in front of heater
(pulling from either direction) may create sooting. Sooting will discolor
walls.
1. The installation must conform with local codes or in absence of local codes, with
National Fuel Gas Code, ANSI Z223.1/NFPA54.
2. This appliance may be installed in an After-Market* Manufactured (Mobile) Home,
where not prohibited by state or local codes.
* (After-Market: Completion of sale, not for purpose of resale from manufacturer.)
This appliance is only for use with type of gas indicated on rating plate.
This appliance is not convertible for use with other gases.
NOTE: See Section VII, “Producing Adequate Air For Combustion And Ventilation” page 11.
IMPORTANT: VENT-FREE HEATERS ADD MOISTURE TO AIR. ALTHOUGH THIS IS
BENEFICIAL, INSTALLING HEATER IN ROOMS WITHOUT ADEQUATE VENTILATION
MAY CAUSE MILDEW TO FORM FROM TOO MUCH MOISTURE.
3. Never install this heater:
♦ in a recreational vehicle, bathroom, bedroom or any other sleeping quarters
♦ where curtains, furniture, clothing, or other flammable objects are less than 42" from
front of the heater
♦ in high traffic areas or in windy areas
4. Two models are available. One specific model for propane (LP), and one for natural gas.
Use the correct type gas for your home. Do not convert from one gas type to another.
NOTE: This appliance complies with ANSI Z21.11.2b-2010 Unvented Room Heater.
“WARNING: ANY CHANGE TO THIS HEATER OR ITS CONTROLS CAN BE
DANGEROUS.”

Page 2
5. If this heater is used with propane gas, do not place propane supply tank (s) inside any structure.
6. What To Do IF You Smell Gas:
Shut off gas supply.
- Do not try to light any appliance.
- Do not touch any electrical switch; do not use any phone in your building.
- Immediately call your gas supplier from a neighbor’s phone.
Follow gas supplier’s instructions.
- If you cannot reach your gas supplier, call fire department.
7. When operated for first time, the logs may emit a “paper burning” smell. This smell will gradually
diminish and will be totally eliminated after first few hours of operation. Run the gas logs with
flue damper open during this time. Do not use blower at this time.
8. “This heater shall not be installed in unusually tight construction unless provisions are
provided for adequate combustion and ventilation air.” See “Producing Adequate Air for
Combustion And Ventilation”, page 11.
9. Surface of gas logs becomes very hot when operating. Keep children and adults away from hot
surface. Gas logs will remain hot for sometime after shutdown. Allow surface to cool before
touching.
10. Do not place clothing or other flammable material on or near appliance.
11. If equipped, fresh air damper must be closed.
12. Keep appliance area clean and free from combustible materials, gasoline and other flammable
flammable vapors and liquids. .
13. If burner shuts off, do not relight until you provide fresh outside air. If burner continues to shut off,
have unit serviced.
14. Do not use this heater if any part has been under water. Immediately call qualified service
technician to inspect room heater and to replace any part of control system and any gas
control which has been under water.
15. Turn off heater and let cool before servicing.
16. These logs are made of bonded fiber. When removing logs and base, do not damage bonded
material. If the material is damaged extensively, loose fiber dust could be emitted into air.
17. Any safety screen or guard removed for servicing an appliance must be replaced prior to
operating heater.
18. This appliance is intended for supplemental heating.
19. “WARNING: Any change to this heater or its controls can be dangerous.”
20. Installation and repairs should be performed by a qualified service person. The appliance
should be inspected before use and at least annually by a professional service person. More
frequent cleaning may be required due to excessive lint from carpeting, bedding material, etc.
It is imperative that control compartments, burners and circulating air passageways of
appliance be kept clean.

Page 3
21. All heater screens must be kept closed when operating gas logs.
22. ”WARNING: Failure to keep the primary air openings of the burners clean may result in
soot and property damage.”
23. Do not use this heater for burning trash or cooking. Never place matches, paper, garbage or any
other material on top of logs or into flames.
24. Do not install or operate this heater in areas where impurities in air exist (such as tobacco
smoke or heavy cooking grease). Particles from impurities may discolor walls.
25. Due to high temperatures, appliance should be located out of traffic and away from
furniture and draperies.
26. Children and adults should be alerted to hazards of high surface temperature and should
stay away to avoid burns or clothing ignition.
27. Young children should be carefully supervised when they are in same room with
appliance.
28. An unvented room heater having an input rating of more than 10,000 Btu per hour shall not be
installed in a bedroom or bathroom.
29. The appliance and its appliance main gas valve must be disconnected from gas supply
piping system during any pressure testing of that system at test pressure in excess of 1/2 psi
(3.5 kPa).
30. The appliance must be isolated from gas supply piping system by closing its equipment
shut-off valve during any pressure testing of gas supply piping system at test pressures
equal to or less than 1/2 psi (3.5 kPa).
31. “WARNING: Do not allow fans to blow directly into fireplace. Avoid any drafts that alter
burner flame patterns.”
32. “WARNING: Do not use a blower insert, heat exchanger insert or other accessory not
approved for use with this heater.”
33. Adequate clearances around air openings. Nothing may be placed over any of air openings
on this appliance or can any of air openings be modified in anyway.

Page 4
INSTALLATION (ZC) (WS)
Your New Buck Vent-Free Gas Fireplace Heater may be installed in Residential or *After-
Market Manufactured Mobile Homes. This appliance may be installed in an *After Market
Manufactured Mobile Home, where not prohibited by state or local codes.
(Exception: This appliance may not be installed in a bedroom or bathroom.)
* (After Market: Completion of sale, not for the purpose of resale from manufacturer).
This appliance is only for use with type of gas indicated on rating plate. This appliance is not
convertible for use with other gases.
NOTE: See page 11 for “Producing Adequate Air For Combustion And Ventilation”.
CHOOSING THE LOCATION FOR YOUR FIREPLACE:
Figure 1 shows some of the many ways your fireplace may be installed. Consider traffic
pattern in your room and location of doors and windows. Moving air from ceiling fans, open
doors and hot air grills may cause flames to soot. If a disturbance is found that affects flames,
it must be eliminated by turning off ceiling fan, closing door or closing hot air register. A
corner location may be best where space is limited.
Your fireplace weighs no more than some of your fine furniture. If fireplace is located near a
load bearing wall, additional supports to the foundation will not be necessary. HEAVY
FACINGS, SUCH AS BRICK, STONE, ETC., MAY REQUIRE ADDITIONAL
FOUNDATION SUPPORT.
NOTE: If this appliance is installed directly on carpeting, tile or other combustible
material, other than wood flooring, appliance shall be installed on a metal or wood panel
extending full width and depth of appliance.
ROOM DIVIDER
PARTIAL ROOM PROJECTION
FULL ROOM PROJECTION
FLUSH
CORNER
Figure 1
GAS LINES
The gas supply line and electrical supply
must be installed before framing in
fireplace by a licensed installer.
DRAFTS
Do not locate fireplace in high traffic areas
or areas exposed to high drafts and winds.
Locate fireplace away from furniture and
draperies.

Page 5
FIREPLACE AND FRAMING DIMENSIONS FOR MODEL 36 (ZC) ZERO
CLEARANCE INSTALLATION
Figure 2
GAS LINE
33-1/8"
18-15/16" 35-5/8" 36-5/8"
21-1/2"
7-1/2"
15"
36-5/8"
Figure 2
37-5/16"
37-5/16"
WARNING:Installation and repairs should be performed by a qualified service person. The appliance
should be inspected before use and at least annually by a professional service person. More frequent clean-
ing may be required due to excessive lint from carpeting, bedding material, etc. It is imperative that control
compartments, burners and circulating air passageways of appliance be kept clean.

Page 6
FIREPLACE CLEARANCES (ZC)
The fireplace may be placed directly on a combustible floor,
against a combustible wall at marked clearances or on a
raised wooden platform.
If fireplace is to be installed on a raised wooden platform, the
platform must be a continuous level surface. The fireplace
must be secured in place so it cannot shift positions. The
nailing flanges on sides of firebox make securing it to
framing easy. They were designed to allow installation of
1/2" wallboard or plywood flush with face of fireplace.
Only header (see Figure 2) may rest on standoffs on top of
firebox.
When firebox is installed over carpeting, vinyl tile or
any combustible material other than wood flooring, it
must be installed on a metal or wood panel extending its full
width and depth. Alternatively, carpeting, vinyl tile, etc. may
be removed beneath fireplace before installing.
COMBUSTIBLE MATERIALS MUST NOT BE
INSTALLED OVER OR TOUCH ANY BLACK PAINTED
SURFACE. DO NOT BLOCK HEAT CIRCULATING AIR
OUTLETS. DOING SO MAY RESULT IN POTENTIAL
FIRE HAZARDS.
1. Sidewall Clearances: Clearances from side of tfireplace
opening to any adjacent combustible wall should not be less
than 7'.
2. Ceiling Clearances: The ceiling height should not
be less than 42" from top of fireplace opening.
INSTALLING FIREBOX (ZC)
This list of specific instructions will help you make certain that
every installation operation is performed correctly. Complete
installation steps in sequence shown.
LOCAL BUILDING CODES SHOULD BE CONSULTED IN
ALL CASES AS TO THE PARTICULAR REQUIREMENTS
CONCERNING INSTALLATION OF FACTORY BUILT
FIREPLACES. Select location for fireplace by taking into
consideration factors previously outlined in “Choosing Location.”
See page 4. Framing Firebox
The width of framed opening must be 37 5/16". The height of
framed opening must be 36 5/8". The entire fireplace can be
elevated above floor to achieve a raised hearth effect. This can be
done by adding a small platform to achieve desired height.
NOTE: The wiring for lower blower must be installed during
framing stage. The nailing flanges on both sides were designed to
allow the installation of 1/2" wallboard or plywood flush with face
of fireplace.
When framing is inside, outside wall will be insulated. If
framing or chase is outside, thin insulation should be used in
framing on back, sides and top. The bottom should be insulated
with a hard insulating board. This will prevent cold from going
into chase through fireplace to living space.
Install Firebox
Install the firebox into framed opening by placing it directly in
front of opening and sliding it into properposition.
Level Firebox
Check the level of firebox on top edge of the fireplace face. Shim
if necessary. Secure Firebox
Secure fireplace to framing. The nailing flanges on firebox will
make securing firebox to frame quick and easy. Use appropriate
size nails or screws to secure firebox.
37 5/16"
7" *
25 3/8" 1/2"
21 1/2"
36-5/8"
37-5/16"
FRONT
VIEW
SIDE
VIEW
TOP
VIEW
Figure 3
HEADER
FRAMING
21 1/2"
36-5/8"
* Note: Minimum 1/2" clearance
NOT required at this point
*

Page 7
FINISHING YOUR FIREPLACE (ZC)
There is a wide variety of finishing material
available for your fireplace from formal wall
treatments with marble and mantels, to rustic
wood paneling, stone or brick.
IT IS IMPORTANT THAT BLACK FACE OF
FIREPLACE NOT BE COVERED WITH ANY
TYPE OF COMBUSTIBLE MATERIAL.
Non-combustible facing materials such as
marble, brick or ceramic tile may overlap
black face of fireplace up to opening on
either side of fireplace. Seal all joints
between black fireplace face and wall
covering with a heat-resistant material such
as rock wool insulation or mortar. Be sure to
use high temperature adhesive or mortar
when anchoring brick, stone or tile to face of
fireplace. Check to see whether man-made
brick and stone are made of non-combustible
materials before using them on the face of
fireplace. Some of these products contain
combustible materials. Combustible wall
coverings such as paneling or wallboard may
not overlap black face of fireplace. The
space between wall covering and fireplace
should be sealed with a heat resistant material
such as rock wool insulation or mortar.
NOTE: An “L” shaped steel lintel must be
installed across top of firebox opening where
facing materials such as brick or stone is used
on face of firebox. It acts as a support/
firestop. It should be attached to face of
fireplace with screws and sealed to t fireplace
with a heat-resistant sealer.
CLEARANCES (ZC)
To ensure a safe installation, following must be
carefully observed.
1. Sidewall Clearances: Clearances from side of
fireplace opening to any adjacent combustible
wall should not be less than 7"right side and 7”
left side. See Figure 4
2. Ceiling Clearances: The ceiling height
should not be less than 42" from the top of
fireplace opening.
3. Mantel Clearances: We have provided 3
different situations to position your mantel.
See Figure 5, page 8.
Non-Combustible materials used in this
installation such as slate, tile, marble, etc.
must be at least 1/2" thick.
4. Floor Clearances: No clearance is
required if appliance is installed per these
instructions.
42" MIN.
CLEARANCE
TO CEILING
7" MIN.
FIGURE 4
SIDE WALL
CLEARANCE
FROM FIREPLACE
OPENING TO SIDE WALL
FRONT
LEFT
SIDE RIGHT
SIDE

Page 8
MANTEL PROFILES FOR 36 (ZC) ZERO CLEARANCE CABINET
MUST BE FOLLOWED
Figure 5
50-3/8"
2-3/8" 2-3/8"
FRONT VIEW OF MODEL 42-ZC-FP
FLAT MANTEL WITH SUPPORTS
3"
2"
42"
COMBUSTIBLE
MATERIAL
STAND OFF
42-ZC-FP LOUVERS
HOOD
CEILING
MANTELS WITH 3/4" BASE
2"
COMBUSTIBLE
MATERIAL
STAND OFF
42-ZC-FP LOUVERS
HOOD
12"
3"
SUPPORT
10"
2"
COMBUSTIBLE
MATERIAL
STAND OFF
42-ZC-FP LOUVERS
HOOD
Bottom of 3/4" Base or Support
may be Flush with top of Unit
if mantel is 10" wide or less.
12"
2-1/2"
3/4"
3"
3-1/2"
Bottom of 3/4" Base or Support
must be at least 2-1/2" from top
of Unit if mantel is 10" wide or more.
3/4"
3-1/2"
3"
2"
COMBUSTIBLE
MATERIAL
STAND OFF
42-ZC-FP
LOUVERS
HOOD
12"
3"
SUPPORT
2-1/2"
2-1/2"
2-1/2"
6"
MANTELS WITH 2-1/2" BASE
Bottom of 2-1/2" Base or Support
may be Flush with top of Unit
if mantel is 12" wide or less.
Bottom of 2-1/2" Base or
Support must be at least
2-1/2" from top of Unit if
mantel is 12" wide or more.
4”
NAILING FLANGE
4”
MODEL FP-36-ZC MANTEL 3/4” FLAT SURFACE MODEL FP-36-ZC MANTEL WITH SUPPORTS
FRONT VIEW MODEL FP-36-ZC
FLAT MANTEL WITH SUPPORTS
39 1/2”
4” 4”

Page 9
INSTALLATION OF MODEL 36 (WS)
WITH OPTIONALWOODEN SURROUND (KIT#PAKDM36)
1. When choosing right location for your heater and surround (mantel) keep following in
mind:
NOTE: Due to high temperatures, this heater should be located out of traffic areas and
away from furniture and draperies.
NOTE: Kit No. (PAKDM36) Optional Wooden Surround (Mantel) for Model 36 (WS).
CAUTION: THE INSTALLATION MUST CONFORM WITH LOCAL CODES OR,
IN THE ABSENCE OF LOCAL CODES, WITH NATIONAL FUEL GAS CODES,
ANSI Z223.1/NFPA 54.
NOTE: See page 15 for “Gas Connection” and page 16 for “Gas Pressure Check”.
WARNING: YOUNG CHILDREN SHOULD BE CAREFULLY SUPERVISED WHEN
THEY ARE IN SAME ROOM WITH APPLIANCE.
DO NOT PLACE CLOTHING OR OTHER FLAMMABLE MATERIAL ON OR NEAR
THE APPLIANCE
2. Screen(s) can not be removed or altered (Position screen (s) in closed position before
leaving heater unattended).
3. Follow instructions for assembly of (Optional) Wooden Surround (Mantel). See
instructions supplied with surround.
4. After mantel has been assembled, slide heater from rear into opening of surround.
NOTE: Place a cloth or blanket over front portions of surround as not to mar wood.
5. Center heater in opening of surround.
6. Fasten surround (mantel) to hearth by using 1/2" wood screws.
7. Insert nine (9) wood screws provided with surround through slots on nailing flange and
secure in place.
8. Position surround (mantel) and fireplace into desired location.
NOTE: Hook gas supply line into heater. Check for leaks using soap and water, not an
open flame.
NOTE: At this point, you may want to anchor surround (mantel) to wall or floor.

Page 10
9. Now you are ready to position log set. See page,s 17-18.
10. To light heater, see “Lighting Instructions”, pages 19 through 30. Make sure you have
right gas valve for Natural or LP gas.
EXPLODED VIEW OF SURROUND KIT# PAKDM36
AS VIEWED FROM BACK OF SURROUND (MANTEL)
SURROUND BASE

Page 11
NOTE: SOME AREAS IN THE UNITED STATES HAVE HIGHER REQUIREMENTS
FOR CUBIC FEET PER 1000 BTU/ HOUR INPUT. (EX. CINCINNATI, OHIO CODES
REQUIRE 70 CUBIC FEET). CHECK YOUR LOCAL CODE BEFORE
INSTALLATION.
PRODUCING ADEQUATE AIR FOR
COMBUSTIONAND VENTILATION
This section is for residential or manufactured (mobile) installation
“This heater shall not be installed in unusually tight construction unless provisions are adequate
for combustion and ventilation air.”
NOTE: This heater shall not be installed in a room or space unless the required volume of in-
door combustion air is provided by method in the National Fuel Gas Code, ANSIZ223.1/NFPA
54, International Fuel Gas Code, or applicable codes.
The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines unusually tight construction or
unconfined space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour
(4.8m3 per kw) of aggregate input rating of all appliances installed in that space and an
unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 BTU per
hour (4.8m3 per kw) of aggregate input rating of all appliances installed in that space. Rooms
communicating directly with space in which appliances are installed, through openings not
furnished with doors, are considered a part of unconfined space.
“WARNING: IF THE AREA IN WHICH HEATER MAY BE OPERATED DOES NOT
MEET REQUIRED VOLUME FOR INDOOR COMBUSTION AIR, COMBUSTION
AND VENTILATION AIR SHALL BE PROVIDED BY ONE OF METHODS DE-
SCRIBED IN NATIONAL FUEL GAS CODE, ANSI Z223.1/NFPA 54, INTERNA-
TIONAL FUEL GAS CODE, OR APPLICABLE CODES.”
“WARNING: IF AREA IN WHICH HEATER MAY BE OPERATED IS SMALLER
THAN THAT DEFINED AS AN UNCONFINED SPACE OR IF BUILDING IS OF
UNUSUALLY TIGHT CONSTRUCTION, PROVIDE ADEQUATE AIR FOR
COMBUSTION AND VENTILATION BY ONE OF METHODS DESCRIBED IN
NATIONAL FUEL GAS CODE, ANSI Z223.1/NFPA 54 AIR FOR COMBUSTION AND
VENTILATION OR APPLICABLE LOCAL CODES.”
Unusually tight construction is defined as construction where:
a) Walls and ceilings exposed to outside atmosphere have a continuous water vapor retarder
with a rating of 1 perm (6 x 10-11 kg per pa-sec-m2) or less with openings gasketed or sealed;
b) Weather stripping has been added on openable windows and doors.
c) Caulking or sealants are applied to areas such as joints around window and door frames,
between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations
for plumbing, electrical, and gas lines and at other openings.

Page 12
DETERMINING FRESH-AIR FLOW FOR
HEATER LOCATION
DETERMINE IF YOU HAVE UNUSUALLY TIGHT CONSTRICTION OR UNCONFINED SPACE
Use this worksheet to determine if you have confined or unconfined space.
SPACE: Includes the room in which you will install heater plus adjoining rooms with
doorless passageways or ventilation grills between rooms.
1. Determine the volume of space (length x width x height).
Length x Width x Height =_________cu.ft.(volume of space)
EXAMPLE: 20 ft.(Length) x 16 ft.(Width) x 8 ft.(ceiling Height)=
2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add volume
of these rooms to total volume of the space.
2. Divide the space volume by 50 cubic feet to determine the maximum BTU/Hr space
can support.
_________(volume of space)/50 cu. ft. =maximum BTU/Hr the space can support)
EXAMPLE: 2560 cu. ft. (volume of space /50 cu. Ft .= 51.2 or
51200 (maximum BTU/Hr space can support)
3. Add the BTU/Hr of all fuel burning appliances in space.
Vent-free heater _______________BTU/Hr
Gas water heater* _______________BTU/Hr
Gas furnace _______________BTU/Hr
Vented gas heater _______________BTU/Hr
Gas fireplace logs _______________BTU/Hr
Other gas appliances* + _______________BTU/Hr
Total = _______________BTU/Hr
Example: Gas water heater 40000 BTU/Hr
Vent-free heater + 18000 BTU/Hr
Total = 58000 BTU/Hr
*Does not include direct-vent gas appliances. Direct-vent draws combustion air
from the outdoors and vents to the outdoors.
4. Compare the maximum BTU/Hr the space can support with actual amount of BTU/Hr
used.
____________BTU/Hr (maximum the space can support)
____________BTU/Hr (actual amount of BTU/Hr used)
Example: 51200 BTU/Hr (maximum the space can support)
58000 BTU/Hr (actual amount of BTU/Hr used)
The space in the above example is unusually tight construction space because actual BTU/Hr
used is more than the maximum BTU/Hr the space can support. You must provide additional
fresh air. Your options are as follows:

Page 13
AIR FOR COMBUSTION AND VENTILATION
FORM INSIDE BUILDING
This fresh air would come from an adjoining unconfined space. When venting to an
adjoining space, you must provide two permanent openings: one within 12" of ceiling and one within
12" of floor on the wall connecting two spaces. (See Options 1 and 2 ) You can also remove door into
adjoining room. (See Option 3 )
WARNING
REWORK WORKSHEET, ADDING SPACE OF ADJOINING UNCONFINED SPACE. THE
COMBINED SPACES MUST HAVE ADEQUATE AMOUNT OF AIR TO SUPPLY ALL
APPLIANCES IN BOTH SPACES.
NOTE: Each opening shall have a minimum free area of 1 square inch per 1000 BTU’s per hour of
total input ratings of all gas utilization equipment in confined space, but not less than 100 square inches.
Figure 6 Ventilation Air From Inside Building
A. Rework worksheet, adding space of an adjoining room. If the extra space provides an
unconfined space, remove door to adjoining room or add ventilation grills between rooms. See
“Air For Combustion And Ventilation From Inside Building”, figure 6.
B. Vent room directly to outdoors. See “Air For Combustion And Ventilation From
Outdoors”, page 14.
C. Install a lower BTU/Hr heater, if lower BTU/Hr size makes room unconfined.
If actual BTU/Hr used is less than maximum BTU/Hr space can support, space is an
unconfined space. You will need no additional fresh air ventilation.
WARNING:
YOU MUST PROVIDE ADDITIONAL VENTILATION AIR IN UNUSUALLY TIGHT
CONSTRUCTION

Page 14
WARNING
THIS HEATER MUST HAVE ADEQUATE AMOUNT OF AIR FOR PROPER
OPERATION. IF NOT, POOR FUEL COMBUSTION COULD RESULT. READ THE
FOLLOWING INSTRUCTIONS TO INSURE PROPER FRESH AIR FOR THIS AND
OTHER FUEL-BURNING APPLIANCES IN YOUR HOME.
AIR FOR COMBUSTION AND VENTILATION
FROM OUTDOORS
Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent
openings: one within 12" of ceiling and one within 12" of floor. Connect these items directly
to outdoors. These spaces include attics and crawl spaces. Follow National Fuel Gas Code
NFPA 54/ANSI Z223.1, Section 5.3, “Air For Combustion and Ventilation” for required size of
ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet air into attic if attic has a thermostat-
controlled power vent. Heated air entering attic will activate power unit.
Ventilated Attic
Outlet Air
Inlet Air
Outlet Air
To Attic
To Crawl
Space
Inlet Air Ventilation
To Crawl Space
Figure 7

Page 15
WARNING: ANY CHANGE TO THIS HEATER OR ITS CONTROLS CAN BE
DANGEROUS. GAS CONNECTION
Check gas type. Use only type of gas indicated on valve rating plate. If type of gas listed on plate is
not your type of gas supply, DO NOT INSTALL. Contact your dealer for proper model.
Always use an external regulator for all LP heaters to reduce supply tank pressure to a maximum of 13"
W.C. This is in addition to regulator furnished with heater.
WARNING: CONNECTION DIRECTLY TO AN UNREGULATED LP TANK CAN CAUSE
AN EXPLOSION.
The normal gas connection is 3/8” N.P.T. made at left side (facing front of appliance) of appliance. If
a right side connection is desired, connecting pipe may be led under rear of burner base to terminate at
right side for connection to inlet of valve.
NOTE: The connecting pipe must be internally tinned copper tubing for use with natural gas. Test for
leaks using a solution of soap and water after completing connection. DO NOT USE OPEN FLAME.
WARNING: Installation and repairs should be performed by a qualified service person. The
appliance should be inspected before use and at least annually by a professional service person.
More frequent cleaning may be required due to excessive lint from carpeting, bedding material,
etc. It is imperative that control compartments, burners and circulating air passageways of
appliance be kept clean.

Page 16
GAS PRESSURE CHECK
Check inlet pressure to burner to ensure that it is as shown in table below.
NOTE: The pressure check point is located on right side of valve facing burner, for ITT, and
left side for SIT.
The appliance and its appliance main gas valve must be disconnected from gas supply piping
system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5kPa).
The appliance must be isolated from gas supply piping system by closing its equipment shut-off
valve during any pressure testing of gas supply piping system at test pressures equal to or less
than 1/2 psi (3.5 kPa).
VALVE (MILLIVOLT) (SIT MANUAL-MODULATING)
MODEL: FP36 FP36 FP36 FP36
GAS Natural Propane Natural Propane
Maximum Heat Input 33,000 33,000 33,000 33,000
Minimum Heat Input 23,000 23,000 12,000 13,000
Gas Inlet Pressure
Maximum 10.5ins.W.C. 13ins.W.C. 10.5ins.W.C. 9.0ins.W.C.
Minimum * 5.0ins.W.C. *11ins.W.C. *5.0ins.W.C. *11ins.W.C.
Manifold Pressure
Maximum 3.5ins.W.C. 9.0ins.W.C. 3.5ins.W.C. 9.0ins.W.C.
Minimum 3.0ins.W.C. 8.2ins.W.C. 2.8ins.W.C. 7.2ins.W.C.
NOTE: On initial installation it may be necessary to bleed out air in gas lines. Do this by
holding control knob and turning knob to “PILOT” position for about 30 seconds.
To check regulator pressure, remove pressure tag plug at left side of regulator facing heater.
The pressure should be checked with heater burning and control set on high. After measuring
pressure, replace pressure tap plug, ensuring that there are no leaks.
* For the purpose of minimum input adjustment.
WARNING
This appliance is equipped for (natural or propane) gas.
Field conversion is not permitted.