Mr Heater Heaters Owner’s Manual
- June 7, 2024
- MR Heater
Table of Contents
Heaters
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place
instructions 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.
UNVENTED NATURAL GAS FIRED ROOM HEATER
Plaque Heaters
MHVFRD20NGBT
(BLOWER INCLUDED)
MHVFRD20NGT
(BLOWER SOLD SEPARATE)
Blue Flame Heaters
MHVFBF20NGBT
(BLOWER INCLUDED)
MHVFBF20NGT
(BLOWER SOLD SEPARATE)
MHVFRD30NGBT
(BLOWER INCLUDED)
MHVFRD30NGT
(BLOWER SOLD SEPARATE)
MHVFBF30NGBT
(BLOWER INCLUDED)
MHVFBF30TNGT
(BLOWER SOLD SEPARATE)
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. Provisions for adequate combustion and
ventilation air must be provided. Refer to Fresh Air for Combustion and
Ventilation section on page 4 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.
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.
MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 800-251-0001
2017 – CB
WARNINGS
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, 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 gas. Field conversion is not
permitted.
WARNING: Do not use any accessory not approved for use with this heater.
WARNING: Any change to this heater or its controls can be dangerous.
· Do not place clothing or other flammable material on or near the appliance.
· Due to high temperatures, heater should be kept out of traffic and away from
furniture and draperies.
· Surface of heater becomes very hot when running. Keep children and adults
away from hot surfaces to avoid burns or clothing ignition. Heater will remain
hot for a time after shutdown. 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.
· Children and adults should be alerted to the hazard of high surface
temperature and should stay away to avoid burns or clothing ignition.
· Any safety screen or guard removed for servicing an appliance must be
replaced prior to operating the heater
CONTENTS
WARNINGS ……………………………………………………………… 2
SPECIFICATIONS……………………………………………………….. 3
PRECAUTIONS………………………………………………………….. 3 IGNITION SYSTEM BATTERY INSTALLATION
…………………..4 BLOWER FAN CONTROL SWITCH OPERATION ………………..4
DETERMINING THE TYPE OF HEATER LOCATION SPACE …..5
INSTALLATION …………………………………………………………. 6 FASTENING HEATER TO WALL
……………………………………..7 FLOOR MOUNTING AWAY FROM WALL ………………………..8 CONNECTING TO GAS
SUPPLY …………………………………….8
OPERATING YOUR HEATER……………………………………….. 10
CLEANING AND MAINTENANCE …………………………………11 TROUBLESHOOTING ………………………………………………..
14 EXPLODED-VIEW PARTS DRAWING…………………………….. 16 PARTS
LIST…………………………………………………………….. 17 WARRANTY ………………………………………………………….. 20
SOCIAL MEDIA
In order to provide the best service possible Mr. Heater is now giving you
more ways to get in touch with us: WEBSITE: Mr. Heater’s full line of product
are now at:
WWW.MRHEATER.COM FACEBOOK: Find us on Facebook
TWITTER: Find us on twitter
YouTube: There are now informational videos on YouTube.
Unvented Natural Gas Vent Free Room Heaters
2 Installation Instructions and Owner’s Manual
SPECIFICATIONS
Operating heater above elevations of 4,500 feet could cause pilot/ODS to
shutdown heater.
MHVFRD20TB / MHVFRD20T NG
MHVFRD30TB / MHVFRD30T NG
MHVFBF20TB / MHVFBF20 NG
MHVFBF30TB / MHVFBF30T NG
BTU (Available)
20,000
30,000
20,000
30,000
Type of Gas
Natural Gas Only
Natural Gas Only
Natural Gas Only
Natural Gas Only
Ignition
Battery ignitor (1-AA) Battery ignitor (1-AA) 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 4.5 Inches of Water
Inlet Gas Pressure (Maximum) 10.5 Inches of Water 10.5 Inches of Water 10.5 Inches of Water 10.5 Inches of Water
Inlet Gas Pressure (Minimum) 7 Inches of Water
7 Inches of Water
9 Inches of Water
9 Inches of Water
Electrical Rating/Blower
120V, 60Hz, 1
120V, 60Hz, 1
120V, 60Hz, 1
120V, 60Hz, 1
Thermostatic Control
Yes
Yes
Yes
Yes
Clearances: inches (mm)
Top
36″ (915cm)
36″ (915cm)
36″ (915cm)
36″ (915cm)
Sides
10″ (254cm)
10″ (254cm)
10″ (254cm)
10″ (254cm)
Floor (min to top of carpet) 3″ (76cm)
3″ (76cm)
3″ (76cm)
3″ (76cm)
Fabric / flammable objects 36″ (915cm)
36″ (915cm)
36″ (915cm)
36″ (915cm)
PRECAUTIONS:
1. 20,000 or 30,00 BTU heater may not be installed in a bedroom or bathroom,
or any place where a strong wind would shut down the appliance.
2. This heater needs outside ventilation air to run properly. The Oxygen
Depletion Sensor (ODS) safety shutoff system shuts down the heater if not
enough fresh air is available. See Fresh Air for Combustion and Ventilation,
pages 4 through 6.
WARNING: An unvented heater having an input of more than 10,000 Btu/hr (2
931W) shall not be installed in a bedroom or bathroom. 3. 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.
4. If heater shuts off, do not relight until you provide fresh, outside air.
If heater keeps shutting off, it requires servicing.
5. Turn off and unplug heater and let cool before servicing. Only a qualified
service person should service and repair heater.
6. Do not run heater:
· Where flammable liquids or vapors are used or
stored
· During dusty conditions.
7. 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.
8. Do not use heater if any part has been underwater. Immediately call a
qualified service technician to inspect the room heater and to replace any
part of the control system and any gas control which has been underwater.
9. Operating heater above elevations of 4,500 feet could cause pilot/ODS to
shutdown heater.
10. Always run heater with control knob in a locked position. Never set
control knob between locked positions. 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 others. 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 odor is detected.
Make certain you read and understand all warnings. Keep this manual for
reference. It is your guide to safe and proper operation of this heater.
3 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
Product Features
Fan Blower Switch
(located on back of heater)
Burners
Ignitor Button Control Knob
Grill Front Panel
Heater Cabinet
*Blower not included on all units Figure 1
SAFETY DEVICE This heater has a pilot with an Oxygen Depletion Sensor (ODS)
safety shut off system. The ODS/pilot shuts off the heater if there is not
enough fresh air.
IGNITION SYSTEM / BATTERY INSTALLATION The heater is equipped with an
electronic manual ignitor. This system requires no matches, or other source to
light heater, but does require one AA battery to operate 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
These heaters have a control valve with a thermostat sensing bulb. This
results in the greatest heater comfort and may result in lower bills.
BLOWER FAN CONTROL SWITCH OPERATION
On models equipped with 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 absences 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 unless provisions are provided for adequate combustion and
ventilation air. Read the following instructions 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 Combustion 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 provided for adequate combustion and
ventilation air. The information on pages 4 through 6 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 6.
Unusually tight construction is defined as construction where:
a. Walls and ceilings exposed to the outside atmosphere 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. Weather stripping has been added on operable windows 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 penetrations
for plumbing, electrical, and gas lines, and at other openings.
If your home does not meet all of the three criteria above, see Determine the
Type of Heater Location Space, page 5.
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 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 m3 per
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 furnished with doors, are considered a part
of the unconfined space.
Unvented Natural Gas Vent Free Room Heaters
4 Installation Instructions and Owner’s Manual
*Adjoining rooms are communication only if there are odorless passageways or ventilation grills between 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 determine 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: This heater shall not be installed in a room or space unless the required volume of indoor combustion air is provided by the method described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code, or applicable local codes.
3. Add the Btu/hr of all the fuel-burning appliances in the space such as, Ventfree heater, Gas water heater, Gas furnace, Vented gas heater, Gas fireplace logs, and Other gas appliances*
*Do not include direct-vent gas appliances. Directvent 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 ventilation grills between the rooms. See Ventilation Air From Inside Building (Figure 2).
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors
(Figure 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 unconfined 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 adjoining 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 ventilation grills or ducts.
Figure 2.
Ventilation Gills into Adjoining Room Option 1
Or remove door into Adjoining Room Option 3
12″
Ventilation Gills into Adjoining Room – Option 2
12″
OUTLET AIR
OUTLET AIR
INLET AIR
VENTILATION AIR VENTILATED ATTIC
TO ATTIC TO CRAWL SPACE
VENTILATION CRAWL SPACE
Figure 3.
5 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
WARNING: Rework worksheet, adding the space of the adjoining unconfined space.
The combined space must have enough fresh air to supply all appliance in both
spaces.
Ventilation from Outdoors If necessary provide extra fresh air by using
ventilation 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
Combustion 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 4 through 6.
INSTALLATION
WARNING: Any change to this heater or its controls can be dangerous.
NOTICE: This appliance is intended for supplemental heating. Use this heater
along with your primary heating system. Do not install this heater as your
primary 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
· 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 included with the heater. If installed on combustible
flooring 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 bedroom (RD20NGT, RD30NGT, 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 possible, provide greater clearances from the floor, ceiling, and
joining walls.
Unvented Natural Gas Vent Free Room Heaters
6 Installation Instructions and Owner’s Manual
10″ (254cm) from sides
36″ min. from ceiling
Left Side
Right Side
Floor
3″ min. to top surface of carpet, tile or other combustible material
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 shipping. Remove mounting bracket
from back panel.
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
hollow 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.
SEE CLEARANCE SPECIFICATIONS ON PG. 3
Adjoining Wall
16″ (Lg) 12-9/64″ (Sm)
Mark mounting hole locations and drill holes where indicated. Allow for
minimum clearances
18″ Min.
Mounting Bracket
Figure 5
Removing Front Panel of Heater 1. Remove (4) screws total there are (2) screws
on either side of the heater (Figure 6). 2. Pull the front panel and back
panel apart.
(2) Screws
(2) Screws
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.
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
Unvented Natural Gas Vent Free Room Heaters
Attaching to Wall using Anchor:
For attaching mounting bracket to hollow walls (wall areas 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.
1. Drill holes at marked locations using 5/16″ drill bit. For solid walls (concrete or masonry), drill at least 1″ deep.
7
Installation Instructions and Owner’s Manual
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 horizontal slots onto stand-out
tabs on mounting bracket.
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 secured to wall. Do not over
tighten.
Note: Do not re-place front panel at this time. Replace front panel after
making gas connections and checking for leaks.
FLOOR MOUNTING AWAY FROM WALL:
Installing Support Feet (see figure 11)
Horizontal Slots
Figure 11
1. Lay heater onto table on its back with bottom edge overhanging table edge.
Mounting Bracket mounted to wall
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).
Screw hole
Screw hole
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 location, 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
Figure 10
2. Mark screws locations on wall.
3. Remove heater from mounting bracket.
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.
Unvented Natural Gas Vent Free Room Heaters
8
WARNING: A qualified service person must connect heater to gas supply. Follow
all local codes. 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.
Installation Instructions and Owner’s Manual
CAUTION: Never connect heater to private (nonutility) gas well. This gas is
commonly known as wellhead gas.
IMPORTANT: Check your gas line pressure before connecting 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 certain 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).
Pressure Regulator
HEATER CABINET 3/8″ NPT Pipe Nipple Ground Joint Union Nipple
Nipple
Tee Joint
Fuel line from Gas Meter
(4″W.C to 10.5″ WC Pressure)
Nipple 3″ minimum
Shutoff Valve
1/8″ NPT Plug Tap
Test Gauge Connection
Reducer Bushing to 1/8″ NPT
Tee Joint
Nipple Cap
Sediment Trap
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
contaminants. 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. The appliance and its appliance main gas valve must be disconnected from
the gas supply piping system during any pressure testing of that system at
test pressures in excess of ½ psi (3.5 kPa). The appliance must be isolated
from the gas supply piping system by closing its equipment shutoff valve
during any pressure testing of the gas supply piping system at test pressures
equal to or less than ½ psi (3.5 kPa).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 equipment 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.
9 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
Pressure Testing Heater Gas Connections:
1. Make sure that the heater supply piping system 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 10 and 11. Check the rest
of the internal joints for leaks.
8. Turn off heater (see To Turn OFF Gas to Appliance, page 11.
9. Replace lower front panel.
Open
Equipment Shutoff Valve
Closed
Caution: Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation. Verify proper
operation after servicing.
Figure 15
ELECTRICAL WIRING DIAGRAM: 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 threeprong receptacle.
Figure 13
Control Valve
To gas meter
Equipment Shutoff Valve
OPERATING YOUR HEATER
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or explosion
may result causing property 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 appliance 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.
Figure 14
· Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s instructions.
· 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.
10 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
D. Do not use this appliance if any part has been underwater. Immediately call a qualified service technician to inspect the appliance and to replace 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. Turn off all electric power to the appliance and 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 16).
4. Wait five (5) minutes to clear out any gas. Then smell for gas including 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 and turn control knob counterclockwise
to PILOT. Press in control knob 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. This may take longer in some installations
Ignitor Button
Control Knob
Figure 16.
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.
· 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 supplier for repairs.
8. When the pilot is lit, turn control knob
counterclockwise
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.
TO TURN OFF GAS TO APPLIANCE
SHUTTING OFF HEATER
1. Turn control knob clockwise position.
to the OFF
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 PILOT/IGN position.
to the
INSPECTING BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 17 shows a correct pilot flame pattern and an incorrect pilot flame
pattern. The incorrect pilot flame pattern is not touching thermocouple. This
will cause the thermocouple to cool. When the thermocouple cools, the heater
will shut down. If pilot flame pattern is incorrect, as shown in Figure 17:
· Turn heater off (see To Turn OFF Gas to
Appliance, above.
· See Troubleshooting, pages 14-15.
Correct pilot position.
Incorrect pilot position.
Figure 17
11 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
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 sooting 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
18). 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.
Pilot Air Inlet Hole
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.
Pilot Assembly
Figure 18
12 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
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.
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
When ignitor button is pressed in, there is 1. Ignitor electrode positioned wrong.
no spark at pilot
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.
REMEDY
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 7. Replace battery
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
1. Gas supply turned off or equipment shutoff 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 7. Thermocouple
connection loose at
control valve 8. Pilot flame not touching thermocouple,
which allows thermocouple to cool, causing 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
1. Control knob not fully pressed in. 2. Control knob not pressed in long
enough 3. Equipment shutoff valve not fully open
4. Thermocouple damaged 5. Control valve damaged
1. Turn on gas supply turn off or open equipment shutoff valve closed
2. Fully press in control knob while pressing ignition button
3. Continue holding down control knob. Repeat ignition operation until air is
removed.
4. Clean ODS/pilot (see Cleaning and Maintenance pages 11 and 12).
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, pages 11 and 12). 6. Replace thermocouple 7. Replace Control
valve.
13 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
Burner does not light after ODS/pilot is lit
Delayed ignition of burner
Burner backfiring during operation
Burner plaque(s) does not glow [Infrared Only] Slight smoke or odor during
initial operation
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
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. Clean burner orifice (see Cleaning and Maintenance on pages 11 and 12), 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 pages 11 and 12), or replace burner orifice
1. Clean burner orifice (see Cleaning and Maintenance on pages 11 and 12), or
replace burner orifice
2. Replace burner 3. Replace gas regulator
1. Replace burner 2. Turn control knob until it locks at de-
sired setting. 3. Replace gas regulator
1. Problem will stop after a few hours of operation
Heater produces a whistling noise when burner is lit
White powder residue forming within burner box or on adjacent walls or
furniture Heater produces unwanted odors.
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
1. Heater burning vapors from paint, hair spray, glues, etc. See IMPORTANT
statement at top of page 14.
2. Gas leak. See WARNING statement at top of page 14.
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 page 7)
4. Clean burner orifice (see Cleaning and Maintenance on pages 11 and 12), or
replace burner orifice.
1. Turn heater off when using furniture polish, wax, carpet cleaner or
similar products.
1. Ventilate room. Stop using odorcausing products while heater is running.
2. Locate and correct all leaks (see Checking Gas Connections, page 10)
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/ticking noise just after burner is lit or shut off
Moisture/condensation noticed on windows
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 14.
2. Control valve is defective 1. Foreign matter between control valve
and burner 2. Gas leak. See WARNING statement at
top of page 14. 1. Metal expanding while heating or con-
tracting while cooling
1. Not enough combustion/ventilation air
1. Open window and/or door for ventilation
2. Contact local gas company 3. Clean ODS/pilot (see Cleaning and
Maintenance, pages 11 and 12)
1. Locate and correct all leaks (see Checking Gas Connections, page 10)
2. Replace control valve
1. Take apart gas tubing and remove foreign matter
2. Locate and correct all leaks (see Checking Gas Connections, page 10)
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.
14 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
This page intentionally left blank.
15 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
PARTS LIST AND DIAGRAM
MODEL: MHVFBF20NGBT / MHVBFD20NGT
ITEM P/N
PART DESCRIPTION
QTY ITEM P/N
PART DESCRIPTION
QTY
1
80094 Wire Guard
1
16 80081 Thermostat Valve
1
2
80096 Front Panel
1
17 N/A
Thermostat Mounting Bracket
1
3
80086 Reflector
1
18 N/A
Back Heat Shield
1
4
80088 Front Heat Shield
1
19 80059 Floor Mount Feet
1
5
80093 Glass
1
20 80097 Back Panel
1
6
80091 Glass Bracket
1
21 80037 Wall Mounting Bracket
1
7
80085 Burner Assembly
1
22 80090 Reflector Back Heat Shield
1
8
80057 ODS Pilot Assembly w/ Thermocouple
1
23 80110 Fan Assembly
1
9
80009 Orifice
1
24 80049 Fan Switch
1
10 80074 Orifice Adapter
1
25 80011 Ignitor Module Mounting Bracket
1
11 N/A Regulator Mounting Bracket
1
26 80019 Ignitor Pulse
1
12 N/A Regulator Connection
1
27 80014 Ignitor Wire
1
13 80107 Regulator
1
28 N/A
Burner Left Bracket
1
14 70597 3/8″ FTP x 3/8″ MPT Elbow
1
29 80013 High Limit Switch (FAN)
1
15 N/A Burner Right Bracket
1
** 70342 Hardware Kit (not shown)
1
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury.
23
24
21
22
Blower not included on all
units
29
27 28 7
25 26
17 18
16 10
20 19
6 8
9
11
15
12
13
5 14
4
3
2 1
16 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
PARTS LIST AND DIAGRAM
MODEL: MHVFBF30NGBT / MHVFBF30NGT
ITEM P/N
PART DESCRIPTION
QTY ITEM P/N
PART DESCRIPTION
QTY
1
80041 Wire Guard
1
16 80081 Thermostat Valve
1
2
80065 Front Panel
1
17 N/A
Thermostat Mounting Bracket
1
3
80025 Reflector
1
18 N/A
Back Heat Shield
1
4
80029 Heat Shield
1
19 80058 Floor Mount Feet
1
5
80039 Glass
1
20 80066 Back Panel
1
6
80035 Glass Bracket
1
21 80037 Wall Mounting Bracket
1
7
80018 Burner Assembly
1
22 80027 Reflector Back Panel
1
8
80057 ODS Pilot Assembly w/ Thermocouple
1
23 80110 Fan Assembly
1
9
80009 Orifice
1
24 80049 Fan Switch
1
10 80073 Orifice Adapter
1
25 80011 Ignitor Module Mounting Bracket
1
11 N/A Regulator Mounting Bracket
1
26 80019 Ignitor Pulse
1
12 N/A Regulator Connection
1
27 80014 Ignitor Wire
1
13 80083 Regulator
1
28 N/A
Burner Left Bracket
1
14 70597 3/8″ FTP x 3/8″ MPT Elbow
1
29 80013 High Limit Switch (FAN)
1
15 N/A Burner Right Bracket
1
** 70342 Hardware Kit (not shown)
1
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury.
BF30TB NG BF30T NG
23
24 22
Blower not included on all
units
29
27 28 7
25 26
17 18
16 10
6 8
9
11
15
12
13
5 14
4
3
21
20 19
2 1
17 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
PARTS LIST AND DIAGRAM
MODEL: MHVFRD20NGBT / MHVFRD20NGT
ITEM P/N
PART DESCRIPTION
QTY ITEM P/N
PART DESCRIPTION
QTY
1
80094 Wire Guard
1
14 N/A
Thermostat Mounting Bracket
1
2
80096 Front Panel
1
15 N/A
Back Heat Shield
1
3
80086 Reflector
1
16 80058 Floor Mounting Feet
1
4
80057 ODS Assembly w/ Thermocouple (NG)
1
17 80097 Back Panel
1
5
80032 ODS Bottom Bracket
1
18 80037 Wall Mounting Bracket
1
6
N/A Burner Assembly
1
19 N/A
Heat Shield Reflector
1
7
70597 3/8″ FTP x 3/8″ MPT Elbow
1
20 80110 Fan Assembly
1
8
80107 Regulator
1
21 N/A
Ignitor Module Mounting Bracket
1
9
N/A Regulator Connection
1
22 80019 Ignitor Pulse
1
10 N/A Regulator Mounting Bracket
1
23 80014 Ignitor Wire
1
11 80009 Orifice
1
24 80013 High Limit Switch (Fan)
1
12 N/A Bracket Plenum Assembly
1
25 80049 Fan Switch
1
13 80081 Thermostat Valve
1
** 70342 Hardware Kit (not shown)
1
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury.
25
20
18
19
Blower not
included on all
units
21
22
24
23
15 14
13
12
11
10
9
6 8
5
7
17 16
4 3
2
1
18 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
PARTS LIST AND DIAGRAM
MODEL: MHVFRD30NGBT / MHVFRD30NGT
ITEM P/N
PART DESCRIPTION
QTY ITEM P/N
PART DESCRIPTION
QTY
1
80041 Wire Guard
1
14 N/A
Thermostat Mounting Bracket
1
2
80065 Front Panel
1
15 N/A
Back Heat Shield
1
3
80023 Reflector
1
16 80058 Floor Mounting Feet
1
4
80057 ODS Assembly w/ Thermocouple (NG)
1
17 N/A
Back Panel
1
5
N/A ODS Bottom Bracket
1
18 80037 Wall Mounting Bracket
1
6
80109 Burner Assembly
1
19 N/A
Heat Shield Reflector
1
7
70597 3/8″ FTP x 3/8″ MPT Elbow
1
20 80110 Fan Assembly
1
8
80083 Regulator
1
21 N/A
Ignitor Module Mounting Bracket
1
9
N/A Regulator Connection
1
22 80019 Ignitor Pulse
1
10 N/A Regulator Mounting Bracket
1
23 80014 Ignitor Wire
1
11 80009 Orifice
1
24 80013 High Limit Switch (Fan)
1
12 N/A Bracket Plenum Assembly
1
25 80049 Fan Switch
1
13 80081 Thermostat Valve
1
** 70342 Hardware Kit (not shown)
1
WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury.
Blower not included on all
units
24
25 20
19
21
22
23
6 5
15 14 13 12 11 10 9
8
7
18
17 16
4 3
2
1
19 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place
instructions 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.
WARNING:
USE ONLY MANUFACTURER’S REPLACEMENT PARTS. USE OF ANY OTHER PARTS COULD CAUSE
INJURY OR DEATH. REPLACEMENT PARTS ARE ONLY AVAILABLE DIRECT FROM THE FACTORY
AND MUST BE INSTALLED BY A QUALIFIED SERVICE AGENCY.
REPLACEMENT PARTS ORDERING INFORMATION:
PURCHASING: Accessories may be purchased at any Mr. Heater local dealer or
direct from the factory
FOR INFORMATION REGARDING SERVICE
Please call Toll-Free 800-251-0001
www.mrheater.com
Our office hours are 8:00 AM 5:00 PM, EST, Monday through Friday.
Please include the model number, date of purchase, and description of problem
in all communication.
LIMITED WARRANTY
Mr. Heater, Inc. warrants its heaters and accessories to be free from defects
in material and workmanship for a period of 1 year from date of purchase. Mr.
Heater, Inc. will repair or replace this product free of charge if it has been
proven to be defective within the 1-year period, and is returned at customer
expense with proof of purchase to Mr. Heater, Inc. within the warranty period.
Mr. Heater, Inc. reserves the right to make changes at any time, without
notice or obligation, in colors, specifications, accessories, materials and
models.
PRODUCT REGISTRATION: Thank you for your purchase. Please log in to
http://www.egiregistration.com to register your product.
Mr. Heater, Inc., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 ·
800-251-0001 Mr. Heater is a registered
trademarks of Mr. Heater, Inc. © 2017, Mr. Heater. All rights reserved
ANSI Z21.11.2 – 2013
20 Unvented Natural Gas Vent Free Room Heaters
Installation Instructions and Owner’s Manual
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>