MrHeater MHBF30NGT Quick start guide

1Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
UNVENTED NATURAL GAS FIRED ROOM HEATER
Blue Flame Heaters Plaque Heaters
Model # Burn Rate Model # Burn Rate
MHBF6NG 6,000 Btu/hr MHIR10NG/HSIR10NG/TSIR10NG 10,000 Btu/hr
MHBF10NG/HSBF10NG/TSBF10NG 10,000 Btu/hr MHIR20NGT/HSIR20NGT/TSIR20NGT 20,000 Btu/hr
MHBF20NGT/HSBF20NGT/TSBF20NGT 20,000 Btu/hr MHIR30NGT/HSIR30NGT/TSIR30NGT 30,000 Btu/hr
MHBF30NGT/HSBF30NGT/TSBF30NGT 30,000 Btu/hr
ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 216-916-3000
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
• Shut off gas supply
• Do not try to light any appliance
• Do not touch an 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.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Pro-
visions for adequate combustion and ventilation air must be provided. Refer to Fresh Air for Combustion and
Ventilation section on page 3 of this manual.
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property
damage. Refer to this manual for correct installation and operational procedures. For assistance or additional
information consult a qualified installer, service agency, or gas supplier.
70574 Rev.G 03/09
MHIR10NG/
HSIR10NG/
TSIR10NG
MHIR20NGT/
HSIR20NGT/
TSIR20NGT
MHBF30NGT/
HSBF30NGT/
TSBF30NGT
MHBF6NG/
MHBF10NG/
HSBF10NG/
TSBF10NG
MHIR30NGT/
HSIR30NGT/
TSIR30NGT
MHBF20NGT/
HSBF20NGT/
TSBF20NGT
INSTALLATION INSTRUCTIONS
AND OWNER’S MANUAL
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instruc-
tions in a safe place for future reference. Do not allow anyone who has not read
these instructions to assemble, light, adjust or operate the heater.
Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference. Serial numbers on back cover.

2Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
This appliance may be installed in an aftermarket* permanently 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 appliance is not
convertible for use with any other gas.
*Aftermarket completion of sale, not for the purpose of resale, from the manufacturer.
safety shutoff system shuts down the heater if not
enough fresh air is available. See Fresh Air for Com-
bustion and Ventilation, pages 3 through 5.
5. Keep all air openings in heater clear, free of debris
or any blockage. This will insure that enough air for
proper combustion enters the heater.
6. If heater shuts off, do not relight until you provide
fresh, outside air. If heater keeps shutting off, it re-
quires servicing.
7. Turn off and unplug heater and let cool before servic-
ing. Only a qualified service person should service
and repair heater.
8. Do not run heater:
• Where flammable liquids or vapors are used or
stored
• During dusty conditions.
9. Before using furniture polish, wax, carpet cleaner or
similar products, turn heater off. If heated the vapors
from these products may create a white powder
residue within burner box or on adjacent walls or
furniture.
10.Do not use heater if any part has been underwater.
Immediately call a qualified service technician to in-
spect the room heater and to replace any part of the
control system and any gas control which has been
underwater.
11.Operating heater above elevations of 4,500 feet
could cause pilot/ODS to shutdown heater.
12.Always run heater with control knob in a locked posi-
tion. Never set control knob between locked posi-
tions. Poor combustion and higher levels of carbon
monoxide may result if control knob is left between
locked positions.
DANGER: Carbon monoxide poisoning may lead to
death.
Carbon Monoxide Poisoning:
Early signs of carbon monoxide poisoning resemble the
flu, with headaches, dizziness, or nausea. If you have
these signs, the heater may not be working properly.
Get fresh air at once! Have heater serviced. Some
people are more affected by carbon monoxide than oth-
ers. These include pregnant women, persons with heart
or lung disease or anemia, those under the influence of
alcohol, and those at high altitudes.
Natural Gas:
Raw natural gas is odorless. An odor making agent is
added to natural gas, which helps you detect a natural
gas leak. However the odor added to natural gas can
fade. So natural gas may be present even though no
WARNINGS
IMPORTANT: Read this owner’s manual carefully
and completely before trying to assembly, operate,
or service this heater. Improper use of this heater
can cause serious injury or death from burns, fire,
explosion, electrical shock, and carbon monoxide
poisoning.
WARNING: This appliance is equipped for (natural
or propane) gas. Field conversion is not permited.
WARNING: Do not use any accessory not ap-
proved for use with this heater.
WARNING: Any change to this heater or its con-
trols can be dangerous.
• Do not place clothing or other flammable
material on or near the appliance. Never place
any objects on the heater.
• Due to high temperatures, heater should be
kept out of traffic and away from furniture and
draperies.
• Surface of heater becomes very hot when run-
ning. Keep children and adults away from hot
surfaces to avoid burns or clothing ignition.
Heater will remain hot for a time after shut-
down. Allow heater surfaces to cool before
handling.
• Young children should be carefully supervised
when they are in the same room with heater.
• Make sure grille guard is in place before
running heater. If screen or grille guard is
removed for servicing it must be replaced prior
to operating the heater.
• Keep the appliance area clear and free from
combustible materials, gasoline, and other
flammable vapors and liquids.
PRECAUTIONS:
1. BF-6 NG may be installed in any room, but not any
place where a strong wind would shut down the ap-
pliance.
2. BF-10 NG and IR-10NG may be installed in a
bedroom, but not a bathroom, or any place where a
strong wind would shut down the appliance.
3. BF-20 NGT, BF-30 NGT, IR-20 NGT and IR-30 NGT
may not be installed in a bedroom or bathroom, or
any place where a strong wind would shut down the
appliance.
4. This heater needs outside ventilation air to run
properly. The Oxygen Depletion Sensor (ODS)

3Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
odor is detected. Make certain you read and under-
stand all warnings. Keep this manual for reference. It is
your guide to safe and proper operation of this heater.
Product Features
Figure 1
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sen-
sor (ODS) safety shut off system. The ODS/pilot shuts
off the heater if there is not enough fresh air.
IGNITION SYSTEM
PIEZO: BF6NG/BF10NG / IR10NG – The heater is
equipped with a piezo manual ignitor. This system
requires no matches, batteries, or other source to light
heater.
Electronic: BF20NGT/BF30NGT/IR20NGT/IR30NGT
– The heater is equipped with an electronic manual ig-
nitor. This system requires no matches, or other source
to light heater, but does require one AA battery to oper-
ate ignitor.(AA Battery included).
To install or replace battery unscrew the ignitor cap
(red button), insert battery positive (+) terminal up
and replace cap.
(AA Battery included)
THERMOSTATIC CONTROL ON
THERMOSTAT MODELS
(BF20NGT, BF30NGT, IR20NGT and IR30NGT)
These heaters have a control valve with a thermostat
sensing bulb. This results in the greatest heater comfort
and may result in lower bills.
These heaters also include an electrical blower. The
blower switch has three positions: MANUAL, OFF and
AUTO. In AUTO, the blower will turn on and off as the
heater cycles on and off. On MANUAL, the blower will run
continuously. To turn blower off, use the OFF position.
LOCAL CODES
Install and use heater with care.
Installation must conform to local codes or in the ab-
sences of local codes, use the latest edition of National
Fuel Gas Code ANSI Z223.1/NFPA 54.
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to
heater for shipment.
3. Check heater for any shipping damage. If
heater is damaged, promptly inform dealer
where you bought heater.
FRESH AIR FOR COMBUSTION AND
VENTILATION
WARNING: This heater shall not be installed in a
confined space or unusually tight construction un-
less provisions are provided for adequate combus-
tion and ventilation air. Read the following instruc-
tions to insure proper fresh air for this and other
fuel-burning appliances in your home.
ESTABLISHING ADEQUATE VENTILATION
The following are excerpts from National Fuel Gas
Code, NFPA 54/ ANSI Z223.1, Section 5.3, Air for Com-
bustion and Ventilation. All spaces in homes fall into
one of the three following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
This heater must not be installed in a confined space or
unusually tight construction unless provisions are pro-
vided for adequate combustion and ventilation air. The
information on pages 3 through 5 will help you classify
your space and provide adequate ventilation.
Unusually Tight Construction
If your home meets all of the three following criteria you
must provide additional fresh air. See Ventilation Air
from Outdoors, page 5.
Unusually tight construction is defined as construction
where:
a. Walls and ceilings exposed to the outside atmo-
sphere have a continuous water vapor retarder with
a rating of one perm (6 x 10-11 kg per pa-sec-m2) or
less with openings gasketed or sealed and
b. Whether stripping has been added on openable win-
dows and doors, and
c. Caulking or sealants are applied to areas such as
joints around windows and door frames, between
wall-ceiling joints, between wall panels, at penetra-
tions for plumbing, electrical, and gas lines, and at
other openings.
If you home does not meet all of the three criteria
above, see Determing the Type of Heater Location
Space, page 4.
Confined Space and Unconfined Space
The National Fuel Gas Code, NFPA 54/ ANSI Z223.1
defines a confined space as a space whose volume is
less than 50 cubic feet per 1,000 Btu per hour (4.8 m3
per kW) of the aggregate input rating of all appliances
Ignitor Button
Control Knob
Grill
Front Panel
Burners
Heater
Cabinet
Room Temperature
Thermometer LED
Fan
Blower
Switch

4Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
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 (4.8 m3per kW) of the aggregate
input rating of all appliances installed in that space.
Rooms communicating directly with the space in which
the appliances are installed*, through openings not fur-
nished with doors, are considered a part of the uncon-
fined space.
*Adjoining rooms are communication only if there
are doorless passageways or ventilation grills be-
tween them.
DETERMINING THE TYPE OF HEATER
LOCATION SPACE:
Use this method to determine if you have a confined or
unconfined space.
Note: the space includes the room in which you
install heater plus any adjoining rooms with doorless
passageways or ventilation grills between the rooms.
1. Find the volume of the space by multiplying room
length x width x height.
Example: Space size 18ft (length) x 18ft. (width) x 8ft.
(height) = 2592
If additional ventilation to adjoining room is supplied
with grills or openings, add the volume of these rooms
to the total volume of the space.
2. Divide the space volume by 50 cubic feet to deter-
mine the maximum Btu/hr the space can support.
Example: 2592 cu.ft. (volume of space) / 50 cu.ft. =
51.8 or 51,800 (maximum Btu/hr the space
can support)
WARNING: If the area in which the heater may be
operated is smaller than defined as an unconfined
space or if the building is of unusually tight con-
struction, provide adequate combustion and ventila-
tion air by the methods described in the National
Fuel Gas Code, NFPA 54/ ANSI Z223.1, Section
5.3 or applicable local codes.
3. Add the Btu/hr of all the fuel-burning appliances
in the space such as, Vent–free heater, Gas water
heater, Gas furnace, Vented gas heater, Gas fire-
place logs, and Other gas appliances*
*Do not include direct-vent gas appliances. Direct-
vent draws combustion air from the outdoors and
vents to the outdoors.
Example: Gas water heater 40,000 Btu/hr
Vent Free Heater + 20,000 Btu/hr
Total =60,000 Btu/hr
4. Compare the maximum Btu/hr the space can support
with the actual amount of Btu/hr used.
Example: 51,800 Btu/hr (maximum Btu/hr the
space can support)
60,000 Btu/hr (Actual amount of Btu/hr
used)
The space in the above example is a confined
space because the 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:
A. Rework worksheet, and the space of an adjoining
room. If the extra space provides an unconfined
space, remove door to adjoining room or add venti-
lation grills between the rooms. See Ventilation Air
From Inside Building (Fig. 2).
B. Vent room directly to the outdoors. See Ventilation
Air From Outdoors (Fig. 3).
C. Install a lower Btu/hr heater if lower Btu/hr size
makes room unconfined.
If actual Btu/hr used is less than the maximum Btu/
hr the space can support, the space is an uncon-
fined space. You will need no additional fresh air
ventilation.
VENTILATION AIR
Ventilation from Inside Building
This fresh air would come from an adjoining unconfined
space. When ventilation to an adjoining unconfined
space, you must provide two permanent openings: one
within 12” of the ceiling and one within 12” of the floor
on the wall connecting the two spaces (see options 1
& 2 of fig. 2). You can also remove door into adjoin-
ing room (see option3, fig 2). Follow the National Fuel
Gas Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for
Combustion and Ventilation for required size of ventila-
tion grills or ducts.
Figure 2.
WARNING: Rework worksheet, adding the space
of the adjoining unconfined space. The combined
space must have enough fresh air to supply all ap-
pliance in both spaces.
Ventilation
Gills into
Adjoining
Room -
Option 1
Ventilation Gills into
Adjoining Room - Option 2
12”
12”
Or remove
door into
Adjoining
Room -
Option 3

5Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
• Ground joint union
• Test gauge connection*
• Sediment trap
• Tee joint
• Pipe wrench
*A CSA/AGA certified equipment shutoff valve with
1/8” NPT tap is an acceptable alternative to test gauge
connection. Purchase a CSA/AGA certified equipment
shutoff valve from your dealer.
LOCATING HEATER
This heater is designed to be mounted on the wall. The
heater can also be located on a non-combustible floor,
away from a wall by using the floor mounting stands in-
cluded with the heater. If installed on combustible floor-
ing such as carpeting, tile or other combustible material
other than wood flooring, the heater must be placed on
a wood panel the full width and depth of the appliance.
For convenience and efficiency, install the heater:
• Where there is easy access for operation,
inspection, and service
• In the coldest part of the room.
• If planning to use fan, locate heater near an
electrical outlet.
CAUTION: If you install the heater in a home garage:
Heater pilot and burner must be at least 18 inches
above floor. Locate heater where moving vehicle will
not hit it.
CAUTION: This heater creates warm air currents.
These currents move heat to wall surfaces next to
heater. Installing heater next to vinyl or cloth wall
covering or operating heater where impurities (such
as tobacco smoke, aromatic candles, cleaning fluids,
oil or kerosene lamps, etc.) are present in the air may
discolor walls.
WARNING: Never install the heater:
• In a bathroom; except MHBF6NG
• In a bedroom (IR20NGT, IR30NGT, BF20NGT
or BF30NGT)
• In a recreational vehicle·.
• Where curtains, furniture, clothing, or other
flammable objects are less than 36 inches from
the front, top, or sides of the heater.
• As a fireplace insert
• In high-traffic areas
• In windy or drafty areas
WARNING: Heater must be mounted to maintain
the minimum clearances shown in Figure 4. If pos-
sible, provide greater clearances from the floor, ceil-
ing, and joining walls.
Figure 3.
Ventilation from Outdoors
If necessary provide extra fresh air by using ventila-
tion grills or ducts. Connect these items directly to the
outdoors or spaces open to the outdoors. These include
attics* and crawl spaces. Follow the National Fuel Gas
Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for Com-
bustion and Ventilation for required size of ventilation
grills or ducts.
*IMPORTANT: Do not provide openings for inlet or
outlet into attic. If attic has a thermostat-controlled
power vent, heated air entering the attic will activate
the power vent.
IMPORTANT: Vent-free heaters add moisture to
the air. Although this is beneficial, installing heater
in rooms without enough ventilation air may cause
mildew to form from too much moisture. See Fresh
Air for Combustion and Ventilation, pages 3 through
5.
INSTALLATION
NOTICE: This heater is intended for the use as supple-
mental heat. Use this heater along with your primary
heating system. Do not install this heater as your pri-
mary heat source. If you have a central heating system,
you may run system’s circulating blower while using
heater. This will help circulate the heat throughout the
house. In the event of a power outage, you can use this
heater as your primary heat source for the duration of
the outage.
WARNING: A qualified service person must install
heater. Follow all local codes.
CHECK GAS TYPE
Use only natural gas. If your gas supply is not natural
gas, do not install heater. Call dealer where you bought
heater for proper type heater.
THIS INSTALLATION REQUIRES:
Before installing heater, make sure you have the items
listed below:
• Piping (check local codes)
• Sealant (resistant to natural gas)
• Equipment shutoff valve*
INLET
AIR
OUTLET
AIR
VENTILATION CRAWL SPACE
TO CRAWL
SPACE
TO ATTIC
VENTILATION AIR
VENTILATED
ATTIC
OUTLET AIR

6Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
Figure 4
FASTENING HEATER TO WALL
Mounting Bracket
The mounting bracket in located on the back panel of
heater (see figure 5). It has been taped there for ship-
ping. Remove mounting bracket from back panel.
Figure 5
Removing Front Panel of Heater
1. Remove three screws on bottom front of front
panel.
2. Pull bottom of front panel forward, then down
(see figure 6)
Figure 6
Attaching Mounting Bracket to Wall
Use holes on each end of mounting bracket to attach
bracket to wall. These holes are 16 inches apart. Attach
mounting bracket to wall in one of two following ways.
1. Attach to wall studs
2. Attach to wall anchor
Attaching to Wall Stud:
This way is the best providing the strongest mounting in
wood frame houses.
Attaching to Wall Anchor:
This way allows you to attach mounting bracket to hol-
low walls (wall areas between studs) or to solid walls
(concrete or masonry).
Decide which way best suits your needs. Either method
will provide a secure hold for the mounting bracket.
1. Tape mounting bracket to wall where heater
will be located. Make sure mounting bracket is
level. For wall stud mounting locate one end of
the mounting bracket over a wall stud.
WARNING: Maintain minimum clearances shown in
figure 7. If you can, provide greater clearances from
the floor and joining wall.
2. Mark screw locations on wall (see figure 7).
3. Remove tape and mount bracket from wall.
Figure 7
Attaching to Wall Stud:
For attaching mounting bracket to wall studs
1. Drill holes at marked locations using 9/64” drill
bit.
2. Place mounting bracket onto wall. Line up
holes on each end of bracket with hole drilled in
wall.
3. Insert mounting screws through bracket and
into wall studs.
4. Tighten screws until mounting bracket is firmly
fastened to wall studs.
Attaching to Wall using Anchor:
For attaching mounting bracket to hollow walls (wall ar-
eas between studs) or solid walls (concrete or masonry)
Note: Wall anchors, mounting screws, and spacer
are in hardware package. The hardware package is
provided with heater.
Adjoining Wall
17-1/2” Min.
6-1/2” Min. 10,000 BTU
10-1/4” min 20,000-30,000 BTU
16” (Lg)
12-9/64” (Sm)
Mark mounting hole locations
and drill holes where indicated.
Allow for minimum clearances
Left
Side Right
Side
36” min. from
ceiling
6” Min from
adjoining
walls
2” min. to top surface of carpet, tile
or other combustible material
Floor
Mounting
Bracket

7Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
1. Drill holes at marked locations using 5/16” drill
bit. For solid walls (concrete or masonry), drill
at least 1” deep.
2. Fold wall anchor as shown in figure 8 below.
Figure 8.
3. Insert wall anchor (wings first) into hole. Tap
anchor flush to wall.
4. For thin walls (1/2” or less) insert red key into
wall anchor.
5. Place mounting bracket onto wall. Line up
holes on each end of bracket with wall anchors.
6. Insert mounting screws through bracket and
into wall anchors.
7. Tighten screws until mounting bracket is firmly
fastened to wall.
Placing Heater on Mounting Bracket
1. Locate two horizontal slots on back pane of
heater (see figure 9).
2. Place heater onto mounting bracket. Slide hori-
zontal slots onto stand-out tabs on mounting
bracket.
Figure 9.
Installing Bottom Mounting Screws
1. Locate two bottom mounting holes. These
holes are near bottom on back panel of heater
(see figure 10).
Figure 10
2. Mark screws locations on wall.
3. Remove heater from mounting bracket.
Horizontal Slots
Mounting Bracket
mounted to wall
4. If installing bottom mounting screw into hollow
or solid wall, install wall anchors. Follow steps 1
through 4 under Attaching to Wall using Anchor.
If installing bottom mounting screw into wall
stud, drill holes at marked locations using 9/64”
drill bit.
5. Re-place heater onto mounting bracket.
6. Place spacers between bottom mounting holes
and wall anchor or drilled hole.
7. Hold spacer in place with one hand. With the
other hand, insert mounting screw through
bottom mounting hole and spacer. Place tip of
screw in opening of wall anchor or drilled hole.
8. Tighten both screws until heater is firmly se-
cured to wall. Do not over tighten.
Note: Do not re-place front panel at this time. Re-
place front panel after making gas connections and
checking for leaks.
FLOOR MOUNTING AWAY FROM WALL:
Figure 11
Installing Support Feet (see figure 11)
1. Lay heater onto table on its back with bottom
edge overhanging table edge.
2. Securely attach feet to bottom of heater using
2 – self-tapping screws each.
Note: Feet should have long end going out the
front of heater, and the edge coinciding with side of
heater. If feet overhang side of the heater, switch
leg location.
3. Place heater on non-combustible surface (see
Locating Heater above) before proceeding with
gas connection. If this will be a permanent loca-
tion, heater may be locked into position using
anchoring holes in mounting feet.
Note: Use of floor mounting feet will require you to
use a 3/8 NPT street elbow to make gas connection.
CONNECTING TO GAS SUPPLY
WARNING: A qualified service person must con-
nect heater to gas supply. Follow all local codes.

8Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
WARNING: This appliance requires a 3/8” NPT
(National Pipe Thread) inlet connection to the
pressure regulator. Use of floor mounting feet will
require you to use a 3/8 NPT street elbow to make
gas connection.
CAUTION: Never connect heater to private (non-utili-
ty) gas well. This gas is commonly known as well-head
gas.
IMPORTANT: Check your gas line pressure before con-
necting heater to gas line. Gas line pressure must be
no greater than 14 inches of water. If gas line pressure
is higher, heater regulator damage could occur.
CAUTION: Use only new black iron or steel pipe.
Internally-tinned copper tubing may be used in cer-
tain areas. Check your local codes. Use pipe of larger
enough diameter to allow proper gas volume to heater.
If pipe is too small, undue loss of pressure will occur.
Installation must include an equipment shutoff valve,
union and plugged 1/8” NPT tap. Locate NPT tap within
reach of test gauge hookup. NPT tap must be upstream
from heater (see figure 12).
Figure 12
*A CSA/AGA certified equipment shutoff valve with
1/8” NPT tap is an acceptable alternative to test gauge
connection. Purchase the CSA/AGA certified equipment
shutoff valve from your dealer. See Accessories, page
17.
IMPORTANT: Install an equipment shutoff valve in an
accessible location. The equipment shutoff valve is for
turning on or shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male threads. This will
prevent excess sealant from going into pipe. Excess
sealant in pipe could result in clogged heater fuel train.
CAUTION: Use pipe joint sealant that is resistant to
natural gas.
Install sediment trap in supply line as shown in figure
12. Locate sediment trap where it is within reach for
cleaning. A sediment trap traps moisture and con-
Pressure
Regulator
Heater
Cabinet
Ground Joint Union
Equipment
Shutoff Valve
From Gas Meter
(4” W.C. to 10.5”
W.C. Pressure)
Tee Joint
1/8” NPT Plug Tap
Cap
Pipe Nipple
Tee Joint
3/8” NPT Pipe Nipple
Sediment
Trap
Test Gauge
Connection
Reducer Bushing
to 1/8” NPT
3” Minimum
taminants. This keeps them from going into heater. If
sediment trap is not installed or is installed improperly,
heater may not run correctly.
IMPORTANT: Hold pressure regulator with wrench
when connecting it to gas piping and/or fittings.
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping and connections for
leaks after installing or servicing. Correct all leaks
at once.
WARNING: Never use an open flame to check for
a gas leak. Apply a mixture of liquid soap and water
to all joints. Bubbles forming show a leak. Correct
all leaks at once.
PRESSURE TESTING GAS SUPPLY PIPING
SYSTEM
Test pressure in Excess of ½ psig (3.5kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment shutoff
valve from gas supply piping system. Pressures
in excess of ½ psig will damage heater regula-
tor.
2. Cap off open end of gas pipe where equipment
shutoff valve was connected.
3. Pressurize supply piping system by either using
compressed air or opening main gas valve on
or near gas meter.
4. Check all connections and joints in gas supply
piping system. Apply mixture of liquid soap and
water to gas joints. Bubbles forming show a
leak.
5. Correct all leaks at once.
6. Depressurize and relieve pressure in supply
piping system.
7. Reconnect heater and equipment shutoff valve
to gas supply.
8. Reconnected fittings must be checked for leaks
in next section.
Test Pressure Equal To or Less Than ½ psig (3.5 kPa)
1. Close equipment shutoff valve (see figure 13).
2. Pressurize supply piping system by either using
compressed air or opening main gas valve on
or near gas meter.
3. Check all joints from the gas meter to equip-
ment shutoff valve (see figure 14). Apply
mixture of liquid soap and water to gas joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
5. Depressurize and relieve pressure from supply
piping system.

9Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
ELECTRICAL WIRING DIAGRAM:
Figure 15
If any original wiring as supplied with the heater must
be replaced, it must be replaced with type AWG 105oC
wire or its equivalent except as indicated.
WARNING: Electrical Grounding Instructions: This
heater is equipped with a three-prong (grounding)
plug for your protection against shock hazard and
should be plugged into a properly grounded three-
prong receptacle.
OPERATING YOUR HEATER
NON-THERMOSTAT MODELS
IR10NG / BF6NG / BF10NG
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions
exactly, a fire or explosion may result causing prop-
erty damage, personal injury or loss of life.
A. This appliance has a pilot that must be lighted
by hand. When lighting the pilot, follow these
instructions exactly.
B. BEFORE LIGHTING smell all around the appli-
ance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and
will settle on the floor.
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 you gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instruc-
tions.
• If you can not reach your gas supplier, call the
fire department.
Pressure Testing Heater Gas Connections:
1. Make sure that the heater supply piping sys-
tem is connected and has been leak tested as
described above.
2. Make sure control knob of heater is in OFF
position.
3. Open equipment shutoff valve (see figure 13).
4. Open main gas valve on or near gas meter.
5. Check all joints from equipment shutoff valve
to control valve (see figure 14). Apply mixture
of liquid soap and water to gas joints. Bubbles
forming show a leak.
6. Correct all leaks at once.
7. Light heater (see Operating Your Heater, pages
11 and 12 for thermostat models or pages 9
and 10 for non-thermostat models). Check the
rest of the internal joints for leaks.
8. Turn off heater (see To Turn OFF Gas to Appli-
ance, page 12 for thermostat models and page
11 for non-thermostat models).
9. Replace lower front panel.
Figure 13
Figure 14
Gas Meter
Control Valve
Equipment
Shutoff Valve
Equipment
Shutoff Valve
Open
Closed

10 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If knob will not
push in or turn by hand, don’t try to repair it; call
a qualified service technician or gas supplier.
Force or attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part has been
underwater. Immediately call a qualified service
technician to inspect the appliance and to re-
place any part of the control system which has
been underwater.
LIGHTING INSTRUCTIONS
1. STOP! Read the all safety information included
with and on the side of heater.
2. Check that gas supply to heater is on.
3. Push in gas control knob and slightly turn clock-
wise to the OFF position (see figure 16).
Note: Knob cannot be turned from PILOT to OFF
unless knob is pushed in slightly. Do not force.
4. Wait five (5) minutes. Then smell for gas, in-
cluding near the floor. If you smell gas, STOP!
Follow “B” in the safety information above. If
you do not smell gas, go to the next step.
5. Push in gas control knob slightly and turn coun-
terclockwise to PILOT/IGN and depress for five
(5) seconds.
Note: The first time that the heater is operated after
connecting the gas supply, the control knob should
be depressed for about 30 seconds. This will allow
air to bleed from the gas system.
6. Push in control knob and rotate control knob
back to OFF position then rotate counterclock-
wise to PILOT/IGN position. This will light pilot.
If needed gently keep rotating control knob
back and forth while depressed until pilot lights.
7. Keep control knob depressed in for ten (10)
seconds after lighting pilot. If pilot goes out,
repeat steps 4, 5, 6 and 7.
• If pilot does not stay lit, refer to Troubleshoot-
ing, pages 14 & 15. Also, contact a qualified
service person or gas supplier for repairs.
• If control knob does not pop up when released,
contact a qualified service person or gas sup-
plier for repairs.
8. FOR IR10NG: When the pilot is lit, turn the con-
trol knob to “LO” position to light heater. Leave
on “LO” position until first burner tile has turned
bright red (Figure 18)
FOR BF6NG and BF10NG: When the pilot is
lit, turn the control knob to “HI” position to light
heater.
9. FOR IR10NG: After first burner tile has turned
bright red, adjust heat output by turning control
knob to desired position (“LO” or “HI”). Do not
operate heater between locked positions.
FOR BF6NG and BF10NG: After flame is estab-
lished (see Burner Flame Pattern, Page 12) on
“HI”, adjust heat output by turning control knob
to desired position (“LO” or “HI”). Do not operate
heater between locked positions.
Figure 16
Figure 17
CAUTION: Do not try to adjust heating level by using
equipment shutoff valve.
Control Knob
LOW
HIGH
OFF
Control Knob
Figure 18
Burner tile pattern
for IR only.

11 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
place any part of the control system which has
been underwater.
LIGHTING INSTRUCTIONS
1. STOP! Read the all safety information included
with and on the side of heater.
2. Make sure the equipment shutoff valve is fully
open.
3. Push in gas control knob and slightly turn clock-
wise to the OFF position (see figure 19).
4. Wait five (5) minutes. Then smell for gas includ-
ing near the floor. If you smell gas, STOP! Fol-
low “B” in the safety information above. If you
do not smell gas, go to the next step.
5. Push in and turn control knob counterclockwise
to PILOT. Press in control knob for five (5) sec-
onds.
Note: The first time that the heater is operated after
connecting the gas supply, the control knob should
be depressed for about 30 seconds. This will allow
air to bleed from the gas system. This may take
longer in some installations
Figure 19.
6. With control knob pressed in, push down and
release the ignition button. This will light pilot. If
needed keep pressing igniter button until pilot
lights.
7. Keep control knob pressed in for (30) seconds
after lighting pilot. After 30 seconds, release
control knob.
Figure 20
Ignitor Button Control Knob
WARNING: When running heater, set control knob
at “LO” or “HI” locked positions. Poor combustion
and higher levels of carbon monoxide may result
if heater is operated with control knob positioned
between locked positions.
IMPORTANT: Release downward pressure while turn-
ing control knob. Control knob must be locked at the
desired position.
TO TURN OFF GAS TO APPLIANCE
SHUTTING OFF HEATER:
1. Turn control knob clockwise to the OFF posi-
tion.
2. Turn off all electrical power to the appliance if
servicing is to be preformed.
3. Turn off equipment shutoff valve.
SHUTTING OFF BURNER ONLY (PILOT STAYS LIT)
1. Turn control knob clockwise to the PILOT/IGN
position.
OPERATING YOUR HEATER
THERMOSTAT MODELS
IR20NGT, IR30NGT, BF20NGT, BF30NGT,
TSIR20NGT, TSIR-30NGT, BF20NGT, BF30NGT
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions
exactly, a fire or explosion may result causing prop-
erty damage, personal injury or loss of life.
A. This appliance has a pilot which must be lighted
by pushing the ignitor button. When lighting the
pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the appli-
ance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and
will settle on the floor.
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 you gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instruc-
tions.
• If you can not reach your gas supplier, call the
fire department.
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If knob will not
push in or turn by hand, don’t try to repair it call
a qualified service technician or gas supplier.
Force or attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part has been
underwater. Immediately call a qualified service
technician to inspect the appliance and to re-

12 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
• If pilot does not stay lit, refer to Troubleshoot-
ing, pages 14 & 15. Also, contact a qualified
service person of gas supplier for repairs.
• If control knob does not pop up when released,
contact a qualified service person or gas sup-
plier for repairs.
8. When the pilot is lit, turn control knob coun-
terclockwise to heating level. The main burner
should light.
9. To select the desired heat level, turn the
temperature setting knob counterclockwise to
between 1 & 5.
THERMOSTAT CONTROL OPERATION
FOR IR20NGT / IR30NGT: The thermostatic control
used simply turns on and off the burner.
FOR BF20NGT / BF30NGT: The thermostatic control
used modulates the flame size as the temperature gets
closer to set point, then it turns off the burner upon
reaching temperature.
The burner will cycle back on when room temperature
drops below the set temperature. The control knob can
be set to any heat level between 1 and 5. Selecting the
HI setting will cause the burner to remain on.
Note: The thermostat sensing bulb measures the
temperature of air near the heater cabinet. This may
not always agree with room temperature (depend-
ing on housing construction, insulation location,
room size, open air temperature, etc.). Frequent
use of your heater will let you determine your own
comfort levels.
The LED temperature indicator measures approximate
room temperature around the heater.
Note: The LED temperature indicator DOES NOT oper-
ate with or control the thermostat setting of the heater.
TO TURN OFF GAS TO APPLIANCE
SHUTTING OFF HEATER
1. Turn control knob clockwise to the OFF posi-
tion.
2. Turn off all electrical power to the appliance if
servicing is to be preformed.
3. Turn off equipment shutoff valve.
SHUTTING OFF BURNER ONLY (PILOT STAYS LIT)
1. Turn control knob clockwise to the PILOT/IGN
position.
INSPECTING BURNER
Check pilot flame pattern and burner flame pattern
often.
PILOT FLAME PATTERN
Figure 21 show a correct pilot flame pattern. Figure 22
shows an incorrect pilot flame pattern. The incorrect
pilot flame pattern is not touching thermocouple. This
will cause the thermocouple to cool. When the thermo-
couple cools, the heater will shut down. If pilot flame
pattern is incorrect, as shown in Figure 22:
• Turn heater off (see To Turn OFF Gas to Ap-
pliance, page 11 for non-thermostat models or
page 12 for thermostat models).
• See Troubleshooting, pages 14 and 15.
BURNER FLAME PATTERN
Figure 23 show a correct burner flame pattern. Figure
24 shows an incorrect burner flame pattern. If burner
flame pattern is incorrect, as shown in Figure 24:
• Turn heater off (see To Turn OFF Gas to Ap-
pliance, page 11 for non-thermostat models or
page 12 for thermostat models).
• See Troubleshooting, pages 14 and 15.
Figure 23a.
Figure 23b.
Figure 24a.
Figure 21 Figure 22

13 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
Figure 24b
CLEANING AND MAINTENANCE
WARNING: Turn off heater and let cool before
servicing.
CAUTION: You must keep control areas, burner
and circulation air passageways of heater clean.
Inspect these areas of heater before use. Have
the heater inspected yearly by a qualified service
person. Heater may need more frequent cleaning
due to excess lent from carpeting, bedding material,
pet hair, etc.
Make sure grille guard is in place before running
heater. If screen or grille guard is removed for
servicing it must be replaced prior to operating the
heater.
WARNING: Failure to keep the primary air
opening(s) of the burner(s) clean may result in soot-
ing and property damage.
CLEANING ODS/PILOT AND BURNER
• Use as vacuum cleaner, pressurized air or
small soft bristled brush to clean.
CLEANING BURNER PILOT AIR HOLE INLET
We recommend that you clean the unit ever 2,500
hours of operation or every three months. We also
recommend that you keep the burner tube and pilot
assembly clean and free of dust and dirt. To clean these
parts we recommend using compressed air no greater
than 30 psig.
This can be done by using a vacuum cleaner in the
blow position, using compressed air in a can, please
follow the directions on the can. If you don’t follow
directions on the can you could damage the burner or
pilot assembly. In addition, the directions that follow
should also be followed.
1. Shut off the unit, including the pilot. Allow the
unit to cool for at least thirty minutes.
2. Inspect burner and pilot for dust and dirt.
3. Blow air through the port/slots and holes in the
burner.
A yellow tip on the pilot flame indicates dust and dirt in
the pilot assembly. To clean the pilot assembly find the
small pilot air inlet hole about two inches from where
the pilot flame comes out of the pilot assembly (see
figure 25). With the unit off, lightly blow air through the
air inlet hole. You may blow through a drinking straw if
compressed air is not available.
Figure 25
CLEANING HEATER CABINET
Air passageways
• Use a vacuum cleaner or pressurized air to
clean
Exterior
• Use a soft cloth dampened with a mild soap
and water mixture. Wipe the cabinet to remove
dust.

14 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
TROUBLESHOOTING
NOTE: All troubleshooting items are listed in order of operation and likely occurrence.
WARNING: Only a qualified service person should service and repair heater.
CAUTION: Never use a wire needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit.
Make sure grille guard is in place before running heater. If screen or grille guard is removed for servicing it must be
replaced prior to operating the heater.
OBSERVED SYMPTOM POSSIBLE CAUSE REMEDY
1. Ignitor electrode positioned wrong.
2. ignitor electrode is broken.
3. Ignitor electrode not connected to ignitor.
4. Ignitor cable pinched or wet.
5. Broken ignitor cable.
6. Bad Piezo ignitor.
7. Low Battery.
1. Gas supply turned off or equipment shut-
off valve closed.
2. Control knob not fully pressed in while
pressing ignition button.
3. Air in gas line when installed.
4. ODS/pilot is clogged.
5. Gas regulator setting is not correct
6. Control knob not in pilot position
1. Control knob not fully pressed in.
2. Control knob not pressed in long enough
3. Equipment shutoff valve not fully open
4. Thermocouple connection loose at con-
trol valve
5. Pilot flame not touching thermocouple,
which allows thermocouple to cool, caus-
ing pilot flame to go out. This problem
could be caused by one or both of the
following:
a. Low gas pressure
b. Dirty or partially clogged ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice is clogged
2. Burner orifice diameter to small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
When ignitor button is pressed
in, there is no spark at pilot
ODS/pilot lights but flame
goes out when control knob is
released
When ignitor button is pressed
in, there is a spark at the ODS/
pilot but no ignition
Burner does not light after
ODS/pilot is lit
1. Reposition electrode
2. Replace electrode
3. Reconnect ignitor cable
4. Free ignitor cable if pinched by any metal
or tubing. Keep ignitor cable dry.
5. Replace ignitor cable
6. Replace control valve (Piezo is part of
control valve on 10K units).
7. Replace battery
1. Turn on gas supply turn off or open equip-
ment shutoff valve closed
2. Fully press in control knob while pressing
ignition button
3. Continue holding down control knob. Re-
peat ignition operation until air is removed.
4. Clean ODS/pilot (see Cleaning and Main-
tenance page 13).
5. Replace gas regulator
6. Turn Control knob to pilot position
1. Press in control knob fully
2. After ODS/pilot lights, keep control knob
pressed in for 30 seconds
3. Fully open equipment shutoff valve
4. Hand tighten thermocouple nut until snug,
and then tighten 1/4 turn more.
5. -
a. Contact local gas company
b. Clean ODS/pilot (see Cleaning and
Maintenance, page ?).
6. Replace thermocouple
7. Replace Control valve.
1. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice
2. Replace burner orifice
3. Contact local gas company
1. Contact local gas company
2. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice
Delayed ignition of burner

15 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
TROUBLESHOOTING
WARNING: 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 you gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover,
cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air
and create odors and possible discoloration of walls and ceilings.
OBSERVED SYMPTOM POSSIBLE CAUSE REMEDY
TROUBLESHOOTING CON’T
1. Heater burning vapors from paint, hair
spray, glues, etc. See IMPORTANT state-
ment above
2. Gas leak. See WARNING statement at top
of page.
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. See WARNING statement at top
of page
2. Control valve is defective
1. Foreign matter between control valve and
burner
2. Gas leak. See WARNING statement at top
of page
1. Metal expanding while heating or contract-
ing while cooling
1. Not enough combustion/ventilation air
1. Ventilate room. Stop using odor-causing
products while heater is running.
2. Locate and correct all leaks (see Checking
Gas Connections, page 8)
1. Open window and/or door for ventilation
2. Contact local gas company
3. Clean ODS/pilot (see Cleaning and Mainte-
nance, page 13)
1. Locate and correct all leaks (see Checking
Gas Connections, page 8)
2. Replace control valve
1. Take apart gas tubing and remove foreign
matter
2. Locate and correct all leaks (see Checking
Gas Connections, page 8)
1. This is common with most heaters. If noise
is excessive, contact qualified service
person
1. Refer to Fresh Air for Combustion and
Ventilation page 3 through 5
Heater produces unwanted
odors.
Heater shuts off in use (ODS
operates)
Gas odor even when control
knob is in OFF position
Gas odor during combustion
Heater produces a clicking/tick-
ing noise just after burner is lit
or shut off
Moisture/condensation noticed
on windows
Burner plaque(s) does not glow
[Infrared Only]
Slight smoke or odor during
initial operation
Heater produces a whistling
noise when burner is lit
Burner backfiring during opera-
tion
1. Burner orifice is clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Plaque damaged
2. Control knob set between locked posi-
tions.
3. Inlet gas pressure is too low
1. Residues from manufacturing process
1. Turning control knob to HI position when
burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice.
1. When heated, vapors from furniture polish,
wax, carpet cleaners, etc., turn into white
powder residue
OBSERVED SYMPTOM POSSIBLE CAUSE REMEDY
1. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice
2. Replace burner
3. Replace gas regulator
1. Replace burner
2. Turn control knob until it locks at desired
setting.
3. Replace gas regulator
1. Problem will stop after a few hours of
operation
1. Turn control knob to LO position and let
warm up for a minute.
2. Operate burner until air is removed from
line have gas line checked by local gas
company.
3. Observe minimum installation clearances
(see Figure 4 page6)
4. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice.
1. Turn heater off when using furniture
polish, wax, carpet cleaner or similar
products.
White powder residue forming
within burner box or on adja-
cent walls or furniture

16 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
SPECIFICATIONS
IR10NG IR20NGT IR30NGT
BTU (Available) 10,000 20,000 30,000
Type of Gas Natural Gas Only Natural Gas Only Natural Gas Only
Ignition Piezo Battery ignitor (1-AA) Battery ignitor (1-AA)
Pressure Regulator Setting 4.5 Inches of Water 4.5 Inches of Water 6.0 Inches of Water
Inlet Gas Pressure (Maximum) 14 Inches of Water 14 Inches of Water 14 Inches of Water
Inlet Gas Pressure (Minimum) 9 Inches of Water 9 Inches of Water 9 Inches of Water
Electrical Rating/Blower — 120V, 60Hz, 1 120V, 60Hz, 1
Burners / Orifice nozzles 2 3 4
Thermostatic Control No Yes Yes
Clearances: inches (mm)
Top 36” (915cm) 36” (915cm) 36” (915cm)
Sides 6” (152cm) 10.5” (267cm) 10.5” (267cm)
Floor (min. to top of carpet) 2” (51cm) 2” (51cm) 2” (51cm)
Fabric / flammable objects 36” (915cm) 36” (915cm) 36” (915cm)
BF6NG BF10NG BF20NGT BF30NGT
BTU (Available) 6,000 10,000 20,000 30,000
Type of Gas Natural Gas Only Natural Gas Only Natural Gas Only
Ignition Piezo Battery ignitor (1-AA) Battery ignitor (1-AA)
Pressure Regulator Setting 4.5 Inches of Water 4.5 Inches of Water 4.5 Inches of Water
Inlet Gas Pressure (Maximum) 14 Inches of Water 14 Inches of Water 14 Inches of Water
Inlet Gas Pressure (Minimum) 9 Inches of Water 9 Inches of Water 9 Inches of Water
Electrical Rating/Blower — 120V, 60Hz, 1 120V, 60Hz, 1
Burners / Orifice nozzles 1 1 1
Thermostatic Control No Yes Yes
Clearances: inches (mm)
Top 36” (915cm) 36” (915cm) 36” (915cm)
Sides 6” (152cm) 10.5” (267cm) 10.5” (267cm)
Floor (min. to top of carpet) 2” (51cm) 2” (51cm) 2” (51cm)
Fabric / flammable objects 36” (915cm) 36” (915cm) 36” (915cm)

17 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
7
2
36
39
38
35
16 21
16-1
16-2
6
26
29
34
24
22-3
19
13
23
18
10
3
11
1-2
1-4
22-2
33-1
22-1
25
9
5
1-3
1-1
27-1
28-1
IR20NGT
IR30NGT
BF20NGT
BF30NGT
4
15
14
42
9
7
26
22-3
22-1
33-1
1-4
44
42
45
3
Thermostat models
6
11
45
4
16-1
16-2
16 227-2
28-2 44 13 23
1-2
1-3
5
29
24
34
43
1-1
25
22-2
8
8

18 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
For all models, Equipment shutoff valve with 1/8” NPT tap.
IR20NGT, IR30NGT, BF20NGT, BF30NGT, BF20NGT, BF30NGT • PARTS LIST
This list contains replacement parts used in your heater. When ordering parts, follow the instructions listed
under Replacement Parts on page 20 of this manual.
ITEM PART NO. DESCRIPTION QTY.
IR20NGT BF20NGT IR30NGT BF30NGT
1 70600 70600 70605 70605 Cabinet assembly 1
1-1 70601 70601 70606 70606 Cabinet Top Panel 1
1-2 70603 70603 70603 70603 Cabinet Right Panel 1
1-3 70602 70602 70607 70607 Cabinet back Panel 1
1-4 70704 70704 70704 70704 Cabinet Left Panel 1
2 70608 70608 70609 70609 Lower Front panel assembly 1
3 70742 70742 70744 70744 Reflector Assembly 1
4 70632 70633 70634 70635 Burner Assembly 1
5 70636 70636 70636 70636 Wall Mounting Bracket 1
6 70637 70637 70637 70637 Thermostat Valve Mounting bracket 1
7 70638 70638 70639 70639 Bezel – Reflector Front 1
8 70640 70640 70640 70640 Thermostat Valve assembly 1
9 70641 70641 70641 70641 Ignitor Module Mounting Bracket 1
10 70642 --- 70643 --- Back Plate 1
11 70644 70644 70644 70644 Ignitor Module, Battery powered
1
12 – – – – – –
13 70338 70338 70356 70338 Pressure regulator 1
14 --- 70646 --- 70648 Glass 1
15 --- 70647 --- 70649 Glass Mounting Bracket 1
16 70339 70339 70339 70339 ODS / Pilot Assembly 1
17 – – – – – –
18 70650 --- 70652 --- Gas Manifold 1
19 70651 --- 70651 --- Gas Manifold Mounting Bracket 1
21 70655 --- 70655 --- ODS mounting bracket 1
22-1 70741 70741 70743 70743 Heat Shield – Top 1
22-2 70745 70745 70745 70745 Heat Shield – Right 1
22-3 70751 70753 70752 70754 Heat Shield – Back 1
23 70663 70663 70663 70663 Regulator Mounting Bracket 1
24 70664 70664 70664 70664 Control / ignitor cover 1
25 70665 70665 70665 70665 Floor mount feet 2
26 70666 70666
70667 70667 Grill guard 1
27-1 — — 70668 --- Orifice, 30, IR 4
27-2 — — — 70669 Orifice, 30, BF 1
28-1 70670 – – – Orifice, 20, IR 3
28-2 – 70671 – – Orifice, 20, BF 1
29 70740 70740 70740 70740 Fan Assembly 1
30 – – – – – –
31 – – – – – –
32 – – – – – –
33-1 70756 70756 70756 70756 Heat Shield – Left 1
34 70674 70674 70674 70674 Digital Thermometer 1
35 70675 – 70676 – Bracket, Top, Plenum Assembly 1
36 70675 – 70676 – Bracket, Bottom, Plenum Assembly 1

19 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
ITEM PART NO. DESCRIPTION QTY.
IR20NGT BF20NGT IR30NGT BF30NGT
37 – – – – – –
38 70677 – 70677 – Burner Plaques, 30 4
39 70677 – 70677 – Burner Plaques, 20 3
40 70678 – 70678 – Plaques Gasket, 30 4
41 70678 – 70678 – Plaques Gasket, 20 3
42 70701 70701 70701 70701 Ignition Cap 1
43 70702 70702 70702 70702 LED Transformer
44 70597 70597 70597 70597 3/8” FTP x 3/8” MPT Elbow
45 70590 70590 70590 70590 AA Battery
* 70680 70680 70680 70680 Power Cord 1
* 70679 70679 70679 70679 Strain Relief Grommet 1
* 70689 – 70692 – Right Burner Gas Tube 1
* 70690 – 70693 – Right Middle Gas Burner Tube 1
* – – 70598 – Left Middle Gas Burner Tube 1
* 70691 – 70694 – Left Burner Gas Tube 1
* 70695 70695 70696 70696 ODS Gas Tube Assembly 1
* 70697 70697 70697 70697 Regulator to Thermostat Valve Tube Ass’y 1
* 70698 – 70698 – Thermostat Valve to Manifold Tube 1
* 70341 70341 70341 70341 Ignitor Wire 1
* 70699 – 70699 – Gas Manifold Nut 1
* 70342 70342 70342 70342 Hardware Kit 1
* 70343 70349 70345 70346 CSA Label 1
* 70349 70349 70349 70349 Gas Instruction Decal 1
* 70350 70350 70350 70350 Inside Warning Label 1
* 70351 70351 70351 70351 Thermostat Sensing Bulb Clip 2
** Not sold separately – Must purchase Assembly
* Items not shown

20 Installation Instructions and Owner’s Manual
Unvented Natural Gas Fired Room Heater
1 70300 70300 70300 Cabinet Assembly 1
1-1 70301 70301 70301 Cabinet Top Panel 1
1-2 70302 70302 70302 Cabinet Right Panel 1
1-3 70303 70303 70303 Cabinet back Panel 1
1-4 70304 70304 70304 Cabinet Left Panel 1
2 70305 70305 70305 Lower Front panel assembly 1
3 70312 70312 70312 Reflector Assembly 1
4 --- 70319 70319 Burner Assembly 1
5 70320 70320 70320 Wall Mounting Bracket 1
6 70321 70321 70321 Valve Mounting bracket 1
7 70322 70322 70322 Bezel – Reflector Front 1
8 70323 70324 70324 Valve / Piezo Assembly 1
10 70325 --- --- Back Plate 1
13 70338 70338 70338 Pressure regulator 1
14 --- 70326 70326 Glass 1
15 --- 70327 70327 Glass Mounting Bracket 1
16 70365 70365 70365 ODS / Pilot Assembly 1
16-1 part of #16 part of #16 part of #16 Thermocouple **
16-2 part of #16 part of #16 part of #16 Ignition Electrode **
21 70655 --- --- ODS mounting bracket 1
22-1 70396 70396 70396 Heat Shield – Top 1
22-3 70330 70331 70331 Heat Shield – Back 1
23 70663 70663 70663 Regulator Mounting Bracket 1
24 70665 70665 70665 Floor mount feet 2
26 70332 70332 70332 Grill guard 1
27-1 70333 --- --- Orifice, IR 2
27-2 —- 70393 70334 Orifice, BF 1
35 70336 --- --- Bracket, Top, Plenum, Assembly 1
36 70336 --- --- Bracket, Bottom, Plenum Assembly 1
38 70677 --- --- Burner Plaques, 10 2
40 70678 --- --- Plaque Gasket, 10 2
42 70337 70337 70337 Control Valve Knob 1
43 70318 --- --- Plenum Assembly 1
44 70597 70597 70597 3/8” FTP x 3/8” MPT Elbow
* 70352 --- --- Right Burner gas tube 1
* 70353 --- --- Left burner gas tube 1
* 70354 70354 70354 ODS Gas Tube Assembly 1
* 70355 70355 70355 Regulator to Thermostat Valve tube Ass’y 1
* 70342 70342 70342 * Hardware kit 1
* 70347 70348 70348 * CSA label 1
* 70349 70349 70349 * Gas Instruction decal 1
* 70350 70350 70350 * Inside warning label 1
IR10NG, BF6NG and BF10NG • PARTS LIST
This list contains replacement parts used in your heater. When ordering parts, follow the instructions listed
under Replacement Parts on page 20 of this manual.
ITEM PART NO. DESCRIPTION QTY.
IR10NG BF6NG BF10NG
* Item Not Shown ** Must purchase assembly