BLUE FLAME VENT-FREE
NATURAL GAS GARAGE
HEATER
’
OWNER S OPERATION AND INSTALLATION MANUAL
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
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Do not try to light any appliance.
Do not touch any electrical switch; do not
use any phone in your building.
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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.
MN300HGA MN300TGA
NON-THERMOSTAT AND
THERMOSTAT MODEL
Installation and service must be performed by a
qualified installer, service agency or gas
supplier.
Table of Contents
WARNING: Improper
installation,
Important Safety Information..................................... 2
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.
Fresh Air for Combustion and Ventilation ............... 4
Installation..................................................................... 8
Operating Your Heater............................................... 11
Cleaning&Maintenance.............................................13
Trouble Shooting.........................................................14
Specifications..............................................................17
Illustrate Parts Breakdown MN300TGA .................18
Parts List MN300TGA .................................................19
Illustrate Parts Breakdown MN300HGA .................20
Parts List MN300HGA .................................................21
This appliance may be installed in an aftermar-
ket* permanently located, manufactured
(mobile) home, where not prohibited by local
codes.
This appliance is only for use with the type of
gas indicated on the rating plate. This
appliance is not convertible for use with other
gases.
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.
WATERVAPOR:ABY-PRODUCTOFUNVENTEDROOM
HEATERS
Water vaporis a by-product of gas combustion.An
unvented room heater produces approximately one (1)
ounce (30ml) of water for every 1,000 BTU’s (.3KW’s)
of gas input per hour. Refer to page 3.
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 Air For Combustion
and Ventilation section on page 4 of this
manual.
Installer: Please leave these instructions with
the consumer.
CONTINENTAL APPLIANCE INC/U.S. OFFICE
5 Musick
Irvine
4600 Highlands Parkway S.E.
Suite # D/E
Consumer: Please retain these instructions for
future use.
CA 92618
Smyrna, GA 30080
Nanjing PRO-COM Electric Appliance Co.,Ltd.
#6 Chuangye Road,High New Tech.Zone,
Great Bridge Road North,Nanjing,210061,
China.
*Aftermarket: Completion of sale, not for purpose of
resale, from the manufacturer.
PRO-COM PHONE NUMBER: (877)886-5989
1
PR-ML062-09-0504
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PRODUCT FEATURES
Figure1-Vent-Free Natural Gas Heater(Model MN300TGA Shown)
SAFETY DEVICE
LOCAL CODES
A standard requirement for all vent-free room
heaters. This heater has a pilot with an Oxygen
Depletion Sensor(ODS) safety shutoff system.
The ODS/pilot shuts off the heater if there is
not enough fresh air.
Install and use heater with care. Follow all local
codes. In the absence of local codes, use the
latest edition of National Fuel Gas code ANSZ223.1,
also known as NFPA 54*.
*Available from :
American National Standards Institute, Inc.
1430 Broadway
PIEZO IGNITION SYSTEM
This heater is equipped with a piezo ignitor.
This system requires no matches, batteries, or
other sources to light heater.
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
THERMOSTATIC HEAT
CONTROL ON THERMOSTAT
MODEL MN300TGA
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.
These heaters have a control valve with
a
thermostat sensing bulb. This results in the
greatest heater comfort and may result in
lower gas bills.
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS
Water vaporis a by-product of gas combustion.An unvented The following steps will help insure that water
room heater produces approximately one (1) ounce (30ml) of vapor does not become a problem.
water for every 1,000 BTU’s (.3KW’s) of gas input per hour.
1. Be sure the heater is sized properly for the
Unvented room heaters are remommended as supplemental application, including ample combusion air and
heat (a room) rather than a primary heat source (an entire circulation air.
house) .In most supplemental heat application, the water 2. If high humidity is experienced, a dehumidifier
vapor does not create a problem. In most applications, the may be used to help lower the water vapor content
water vapor enhances the low humidity atmosphere of the air.
experience during cold weather.
3. Do not use an unvented room heater as the
primary heat source.
3
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Unusually Tight Construction
The air that leaks around doors and
windows may provide enough fresh
air for combustion and ventilation.
However, in buildings of unusually
tight construction, you must provide
additional fresh air.
Unusually tight construction is
defined as construction where:
a. walls and ceilings exposed to the
Confined and
Unconfined Space
FRESH AIR FOR
COMBUSTION AND
The National Fuel Gas Code ANS
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
VENTILATION
WARNING: This heater
shall not be installed in a
confined space or unusually
tight
provisions are provided for
adequate combustion and
ventilation air. Read the
follow in g in stru ctio ns to
insure proper fresh air for this
and other fuel-burning
construction
unless
and an unconfined space as
a
outside
atmosphere
have
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
th e sp ac e in
appliances are installed*, through
openings not furnished with doors,
are considered
unconfined space.
This heater shall not be installed
in a confined space or unusually
continuous water vapor retarder
with a rating of one perm (6 10-11 kg
×
per pa-sec-m2)
or less with
openings gasketed or sealed and
b. weather stripping has been
added on openable windows and
doors and
appliances in your home.
w h ic h
th e
PRODUCING ADEQUATE
VENTILATION
c. caulking or sealants are applied
to areas such as joints around
window and door frames, between
sole plates and floors, between
wall-ceiling joints, between wall
panels, at penetrations for plumbing,
electrical, and gas lines, and at
other openings. If your home meets
all of the three criteria above, you
must provide additional fresh air.
See Ventilation Air from Outdoors,
page 6.
a
part of the
The following are excerpts from
National Fuel Gas Code. NFPA 54/
ANS 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
tig h t
c o n s tru c t io n
u n le ss
provisions are provided for
adequate
combustion
and
a r e
ventilation air.
A d j o i n in g
communicating only if there are
r o o m s
*
d o o rless
p ass ag e w ays
o r
The information on pages 4
through 6 will help you classify
your space and provide adequate
ventilation.
If your home does not meet all of
the three criteria above, see
Determining Fresh-Air Flow for
Heater Location, page 5
ventilation grills between them.
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if you have a Confined or Unconfined Space*
Use this worksheet to determine if you have a confined or unconfined space.
Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways
or ventilation grills between the rooms.
1. Determine the volume of the space (length width height)
×
×
Length Width Height=
cu.ft. (volume of space)
×
×
Example: Space size 20ft. (length) 16ft.( width) 8ft. (ceiling height)=2560cu. ft. (volume of space)
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.
(volume of space)÷ 50 cu. ft.=(Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space)÷50 cu.ft.=51.2 or 51.200(maximum Btu/Hr the space can support)
WARNING: If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide adequate combustion and
ventilation air by one of the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3
or applicable local codes.
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3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater
Gas water heater*
Gas furnace
Vented gas heater
Gas Fireplace logs
Other gas appliances* +
Total
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Example:
Gas water heater
Vent free heater
Total
40,000
20,000
60,000
Btu/Hr
Btu/Hr
Btu/Hr
+
=
=
*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and
vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
Btu/Hr (maximum the space can support)
Btu/Hr (actual amount of Btu/Hr used)
Example : 51,200 Btu/Hr(maximum 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, adding the space of an adjoining room. If the extra space provides an unconfined
space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From
Inside Building, page 5.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6 .
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the 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 Air From Inside Building
This fresh air would come from an
adjoining unconfined space. When
ventilating 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 and 2, Figure 2). You can also
remove door into adjoining room (see
option 3, Figure 2). Follow the National
Fuel Gas Code NFPA 54/ANS Z223.1.
Section 5.3, Air for Combustion and
Ventilation for required size of
ventilation grills or ducts
WARNING: Rework worksheet, add-
ing the space of the adjoining
unconfined space. The combined spaces
must have enough fresh air to supply all
appliances in both spaces.
Figure 2 -Ventilation Air from Inside Building
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VENTILATION AIR
Ventilation Air From Outdoors
Provide extra fresh air by using
ventilation grills or duels: You must
provide two permanent openings: one
within 12" of the ceiling and one within
12" of the floor.
Connect these items directly to the
outdoors or spaces open to the outdoors.
These spaces include attics and crawl
spaces. Follow the National Fuel Gas
Code NFPA 54/ANS 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 air into attic if attic has
a
thermostat-controlled power vent.
Figure 3 -Ventilation Air from Outdoors
Heated air entering the attic will activate
the power vent.
INSTALLATION
*A CSA/AGA design-certified equip-
ment shutoff valve with 1/8" NPT
tap is an acceptable alternative to
test gauge connection. Purchase
the optional CSA/AGA design cer-
tified equipment shutoff valve from
your dealer. See Accessories, page
NOTICE: This heater is
CAUTION: This heater
creates warm air currents.
These currents move heat
intended for use as supplemental
heat. 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.
to wall
h e ate r. In s tallin g
next to vinyl or cloth wall
c o ver in g s o r o p e r at in g
surfaces next to
h eat er
17.
heater where impurities (such as
tobacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist may
discolor walls.
LOCATING HEATER
This heater is designed to be
mounted on a wall. You can locate
heater on floor, away from a wall.
An optional floor mounting stand is
needed. Purchase
the
floor
mounting stand from your dealer.
See Accessories, page 17.
For convenience and efficiency,
install heater
WARNING: A qualified
service person must install
heater. Follow all local codes.
WARNING: Never install
the heater
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in a bedroom or bathroom.
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.
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where there is easy access for
operation, inspection, and service
in coldest part of room
CHECK GAS TYPE
Use only natural gas. If your gas
supply is not natural, do not install
heater. Call dealer where you
bought heater for proper type heater.
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An optional fan kit is available from
your dealer. See Accessories,
page 17. If planning to use fan,
locate heater near an electrical
outlet.
INSTALLATION NEEDS
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Before installing heater, make sure
you have the items listed below.
CAUTION: If you install the
heater in a home garage
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piping (check local codes)
sealant (resistant to natural
gas)
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heater pilot and burner must
be at least 18 inches above
floor.
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equipment shutoff valve*
ground joint union
test gauge connection*
sediment trap
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locate heater where moving
vehicle will not hit it.
tee joint
pipe wrench
6
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INSTALLATION
FASTENING HEATER TO WALL
Mounting Bracket
Attaching to Wall Stud: This method
provides the strongest hold. Insert
mounting screws through mounting
bracket and into wall studs.
WARNING: Maintain the
minimum clearances shown
in Figure 4. If you can,
provide greater clearances from
floor, ceiling, and joining wall.
The mounting bracket is located
on back panel of heater (see
figure 6). It has been taped there
for shipping. Remove mounting
bracket from back panel.
Attaching to Wall Anchor: This
method allows you to attach
mounting bracket to hollow walls
(wall areas between studs) or to
solid walls (concrete or masonry).
Decide which method better
your needs. Either method
suits
will
provide a secure hold for the
mounting bracket.
Figure 6 -Mounting Bracket
Location
Marking Screw Locations
1. Tape mounting bracket to wall
where heater will be located.
Make sure mounting bracket is
level.
Removing Lower Front Panel Of
Heater
1. Remove two screws near bottom
corners of lower front panel .
2. Pull bottom of lower front panel
forward, then down (see Figure 7).
Figure 4 -Mounting Clearaances
As Viewed From Front Of Heater
WARNING:
Maintain
IMPORTANT: Vent-free
heaters add moisture to the
air. Although this is beneficial,
installing heater in rooms
without enough ventilation air
minimum clearances shown in
Figure 8. If you can, provide
greater clearances from floor
and joining wall.
may cause mildew to
form
2. Mark screw locations on
wall. (see Figure 8)
Note: Only mark last hole on
each end of mounting bracket.
Insert mounting screws through
these holes only.
from too much moisture. See
Fresh Air for Combustion and
Ventilation, pages 4 and 5.
INSTALLING THERMOSTAT
SENSING BULB
For MN300TGA
3. Remove tape and mounting
bracket from wall.
1. Pull out the sensing bulb from the
two clips located in the shippng
position according to the direction
as shown by the arrow. There is no
need to take out the two bulb clips.
2. Take out the bulb clip from the
hardware package and insert it into
the square hole and then insert the
sensing bulb into the bulb clip (see
Figure 5).
Figure 7 - Removing Lower Front
Panel Of Heater
Methods For Attaching Mounting
Bracket To Wall
Only use last hole on each end
of mounting bracket to attach
bracket to wall. These two holes
are 16 inches apart from their
centers. Attach mounting bracket
to wall only in one of two ways:
1. Attaching to wall stud
Model MN300HGA MN300TGA
Figure 8 - Mounting Bracket
Clearances
2. Attaching to wall anchor
Figure 5 - Moving Thermostat
Sensing Bulb
7
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INSTALLATION
Attaching Mounting Bracket to
Wall
Note: Wall anchors, mounting
screws, and spacers are in
hardware package. The hardware
package is provided with heater.
Attaching to Wal l Stud Method
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 last hole on each
end of bracket with holes 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 Anchor
Method
For attaching mounting bracket to
hollow walls (wall areas between
studs) or solid walls. (concrete or
masonry)
Figure 10 - Popping Open Anchor
Wing for Thin Walls
Figure 12 - Installing Bottom
Mounting Screws
5. Place mounting bracket onto
wall. Line up last hole 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.
2. Mark screw locations on wall.
3. Remove heater from mounting
bracket.
4. If installing bottom mounting
screws into hollow or solid wall,
install wall anchors. Follow steps
1 through 4 under Attaching To
Wall Anchor Method. If installing
bottom mounting screw into wall
stud, drill holes at marked
locations using 9/64" drill bit.
5. Replace heater onto mounting
bracket.
Placing Heater on Mounting
Bracket
1. Locate two horizontal slots on
back panel of heater (see
Figure 11).
2. Place heater onto mounting
bracket. Slide horizontal slots
6. Place spacers between bottom
mounting holes and wall anchor
or drilled hole.
onto stand-out
mounting bracket.
tabs
on
7. Hold spacer in place with
one
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 9 below.
hand. With 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.
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Note: Do not replace lower front
panel at this time. Replace lower
front panel after making gas
connections and checking for
leaks (see page 9).
Figure 9 - Folding Anchor
Figure 11 - Mounting Heater Onto
Mounting Bracket
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. Push red key to
"pop" open anchor wings.
Installing Bottom Mounting
Screws
1. Locate two bottom mounting
holes. These holes are near
IMPORTANT: Do not ham-
mer key! For thick walls (over 1/
2" thick) or solid walls,
do not pop open wings.
bottom on
heater(see Figure 12).
back panel of
8
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INSTALLATION
CONNECTING TO GAS SUPPLY
WARNING: qualified
A
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.
WARNING: Never connect
heater to private (non-utility) gas
well. This gas is commonly
known as well-head 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.
Figure 13 -Gas Connection
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 large enough diameter to
allow proper gas volume to heater.
*A CSA/AGA design-certified equipment shutoff valve with 1/8" NPT tap is
an acceptable alternative to test gauge connection. Purchase the optional
CSA/AGA design-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.
Install sediment trap in supply line
as shown in Figure 13. Locate
sediment trap where it is within
If
pipe
is
too
small,
undue loss of pressure will
occur.
reach
sediment
for cleaning. Locate
trap where trapped
Typical Inlet Pipe Diameters
MN300HGA/MN300TGA 1/2” or
greater
matter is not likely to freeze. A
sediment trap traps moisture and
contaminants. This keeps them
from going into heater controls. If
sediment trap is not installed or is
installed wrong, heater may
not run properly.
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 valves.
Installation
must
include an
equipment shutoff valve, union,
and plugged 1/8" NPT tap. Locate
NPT tap within reach for test gauge
hook up. NPT tap must be up
stream from heater (see Figure
13).
CAUTION: Use pipe joint
sealant that is resistant to
natural gas.
IMPORTANT:
Hold pressure
regulator with wrench when
connecting it to gas piping and/or
fittings.
9
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INSTALLATION
OPERATING YOUR HEATER
CHECKING GAS
CONNECTIONS
Pressure Testing Heater Gas
Connections
THERMOSTAT MODEL
MN300TGA
WARNING:
Test all gas
nFOR YOUR SAFETYn
1. Open equipment shutoff valve
(see Figure 14).
2. Open main gas valve located on
or near gas meter.
3. Make sure control knob of
heater is in the OFF position.
4. Check all joints from equipment
shutoff valve to control valve
(see Figure 15 ). Apply mixture of
liquid soap and water to gas
joints. Bubbles forming show
a leak.
piping and connections for leaks after
installing or servicing. Correct all
leaks at once.
READ BEFORE LIGHTING
WARNING: If you do not
follow
exactly, a fire or explosion may
result causing property
these
instructions
WARNING: Never use an open
flame to check for a leak. Apply
mixture of liquid soap and water
to all joints. Bubbles forming
show a leak. Correct all leaks at
once.
a
damage, personal injury
loss of life.
or
A. This appliance has a pilot which
must be lighted by hand.
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of
1/2 PSIG (3.5 K Pa)
When lighting the pilot, follow
these instructions exactly.
5. Correct all leaks at once.
6. Light heater (see Operating
Heater, pages 11 for thermostat
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 .
1. Disconnect appliance with its
appliance
main
gas valve
model or
page 12
for
(control valve) and equipment
shutoff valve from gas supply
piping system. Pressures in
excess of 1/2 psig will damage
heater regulator.
non-thermostat model). Check
the rest of the internal joints for
leaks.
WHAT TO DO IF YOU SMELL GAS
7. Turn off heater (see To Turn Off
Gas To Appliance, page 11 for
thermostat model or page 12
for non-thermostat model).
8. Replace lower front panel.
2. Cap off open end of gas pipe
where equipment shutoff valve
was connected.
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Do not try to light any appliance.
Do not touch any electric switch;
do not use any phone in your
building.
3. Pressurize
system
supply
piping
eith er u sin g
by
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Immediately
supplier from
call
a
your gas
neighbor’s
compressed air or opening
main gas valve located on or
near gas meter.
phone. Follow
the
gas
supplier’s instructions.
4. Check all joints of gas supply
piping system. Apply mixture of
liquid soap and water to gas
joints. Bubbles forming show
a leak.
If you cannot reach your
gas supplier, call the fire
department.
Figure 14 -Equipment Shutoff Valve
C. Use only your hand to push in
or turn the gas control knob.
Never use tools. If the 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.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check
reconnected fittings for leaks.
Test Pressures Equal To or
Less Than 1/2 PSIG (3.5 K Pa)
1. Close equipment shutoff valve
(see Figure 14).
2. Pressurize supply piping system
by either using compressed air
or opening main gas valve
located on or near gas meter.
3. Check all joints from gas meter to
equipment shutoff valve (see
Figure 15). Apply mixture of
liquid soap and water to gas
joints. Bubbles forming show
a leak.
D. Do not use this appliance if any
part has been under water.
Figure 15 -Checking Gas Joints
Immediately call
a
qualified
service technician to inspect
the appliance and to replace
any part of the control system
and any gas control which has
been under water.
WARING:Do not over tighten gas
connections.
4. Correct all leaks at once.
10
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OPERATING YOUR HEATER
This increases or decreases the
7. Keep control knob pressed in
for thirty (30) seconds after
THERMOSTAT MODEL
MN300TGA
burner flame height. At times the room
may exceed the set temperature. If
so, the burner will shut off. The burner
will cycle back on when room tem-
perature drops below the set
temperature. The control knob can be
set to any heat level between HI and
LO. Selecting the HI setting will cause
the burner to remain fully on without
modulating down in most cases.
lighting
pilot.
After
30
nLIGHTINGn
INSTRUCTIONS
seconds, release control knob.
If control knob does not pop
up when released, contact a
l
1. STOP! Read
the safety
qualified
service person or
information on the side of
heater.
2. Check that gas supply to
heater is on.
3. Push in gas control knob
slightly and turn clockwise
to the OFF position.
NOTE: knob cannot be turned from
“PILOT” to “OFF” unless knob is
pushed in slightly. Do not
force.
gas supplier for repairs.
NOTE: If pilot goes out, repeat
steps 3 through 7. Wait one (1)
minute before lighting pilot again
NOTE:
the thermostat sensing
8. Turn
control
knob
to
bulb measures the temperature
of air near the heater cabinet.
This may not always agree with
room temperature (depending
counterclockwise
desired heating Level. The
main burner should light. Set
control knob to any heat level
between HI and LO.
o n
h o u sin g
c o n s tr u c t io n .
installation location, room size,
open air temperatures, etc.).
frequent use of your heater will
let you determine your own
comfort levels.
4. Wait five (5) minutes to clear
out any air. Then smell for
gas, including near the floor.
If
you
smell gas, STOP!
in the safety
Follow “B”
information on the side of the
heater. If you do not smell
gas, go to the next step.
nTO TURN OFFn
GAS TO APPLIANCE
Figure 16 - Control Knob in The
OFF Position
5. Push
in gas control knob
Shutting Off Heater
1. Turn control knob clockwise
slightly and turn
counter-
clockwise to the “PILOT/IGN”
position and depress for
five(5) seconds
to the OFF position.
2. Turn off all electric power to
the appliance if service is to
be performed.
SHUTTING OFF BURNER ONLY
(PILOT STAYS LIT)
NOTE: The first time that the
h eater
is op erated after
connecting the gas supply , the
control knob should be depressed
for about thirty (30) seconds. This
will allow air to bleed from the gas
system.
Turn control knob clockwise
the PILOT/IGN position
to
Figure 17 - Pilot
nMANUAL LIGHTINGn
6. With control knob pressed in,
push down and release the
ignitor button. This will light
pilot. If needed, keep pressing
ignitor button until pilot lights.
NOTE: If pilot does not stay lit,
refer to Troubleshooting, pages 14
through 16. Also contact a qualified
service person or gas supplier for
repairs. Until repairs are made, light
pilot with match. To light pilot with
match, see Manual Lighting
Procedure.
PROCEDURE
1. Remove lower front panel (see
nTHERMOSTATn
CONTROL
Figure 7 page 7).
2. Follow steps
1
through 5
OPERATION
under Lighting Instructions.
3. With control knob pressed in,
strike match. Hold match to
pilot until pilot lights.
4. Keep control knob pressed in
for 30 seconds after lighting
pilot. After 30 seconds, release
control knob. Follow step 8
under Lighting Instructions.
The thermostatic control used on
these models differs from standard
thermostats. Standard thermostats
simply turn on and off the burner.The
thermostat used on this heater
senses the room temperature. The
thermostat adjusts the amount
of gas flow to the
burner.
5. Replace lower front panel.
11
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OPERATING YOUR HEATER
NON-THERMOSTAT MODEL
MN300HGA
nLIGHTINGn
6. With control knob pressed in,
push down and release the
ignitor button. This will light
pilot. If needed, keep pressing
ignitor button until pilot lights.
INSTRUCTIONS
1. STOP!
information on the side of heater.
2. Check that gas supply to
heater is on.
Push in control knob slightly
and turn clockwise to the
Read
the
safety
nFOR YOUR SAFETYn
READ BEFORE LIGHTING
7.
Keep control knob depressed
for ten (10) seconds after lighting
pilot. if pilot goes out, repeat
steps 5,6 and 7.
WARNING: If you do not
follow these instructions exactly,
a fire or explosion may result
3.
OFF position (see Figure 18).
NOTE: Knob cannot be turned
from "PILOT " to "OFF" unless
knob is pushed in slightly. Do
not force.
causing property
damage,
8.
To select the desired heating
level, partially press down the
control knob slightly and rotate
personal injury or loss of life
A.
This appliance has a pilot
which must be lighted by hand.
When lighting the pilot, follow these
instructions exactly.
counterclockwise
. Release
4. Wait five 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 on the side
of heater. If you don’t smell gas,
the downward pressure on the
knob while continuing to turn
until the knob locks at the
desired setting position. Do not
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.
operate
positions.
between locked
g o t o t h e
Push in and turn control knob
counterclockwise to PILOT
n e xt
s t e p .
5.
WHAT TO DO IF YOU SMELL GAS
nTOTURN OFFn
GAS TO APPLIANCE
position. Press in control knob
for five(5) seconds.
l
l
Do not try to light any
appliance.
Do not touch any electric
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.
Shutting Off Heater
Note: You may be running
this heater for the first time
after hooking up to gas supply.
If so, you may need to press
in control knob for 30 seconds.
This will allow air to bleed from
the gas system.
1. Turn control knob clockwise
to the OFF position.
2. Turn off all electric power to
the appliance if service is to
be performed.
l
l
Shutting Off Burner Only (pilot
stays lit )
Slightly press in control turn
If you cannot reach your gas
supplier,
call
the
fire
control knob clockwise
PILOT position.
to the
department.
C. Use only your hand to push in
or turn the gas control knob.
Never use tools. If the 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 under water.
Immediately call a qualified service
tec hn ic ian to inspect th e
appliance and to replace any part of
the control system and any gas
control which has been under water.
nMANUAL LIGHTINGn
PROCEDURE
1. Remove lower front panel (see
Figure 18 - Control Knob in The
OFF Position
Figure 7 page 7).
2. Follow steps
1
through 5
under Lighting Instructions.
3. With control knob pressed in,
strike match. Hold match to
pilot until pilot lights.
4. Keep control knob pressed in
for 30 seconds after lighting
pilot. After 30 seconds, release
control knob. Follow step 8
under Lighting Instructions.
Figure 19 - Pilot
5. Replace lower front panel.
12
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BURNER FLAME PATTERN
Figure 22 shows a correct burner
flame pattern. Figure 23 shows an
incorrect burner flame pattern. If
pilot flame pattern is incorrect, as
shown in Figure 23:
CLEANING ODS/PILOT AND
BURNER
INSPECTING
BURNER
l
Use
a
vacuum cleaner,
Check pilot flame pattern and
burner flame pattern often.
pressurized air or a small, soft
bristled brush to clean.
PILOT FLAME PATTERN
CLEANING BURNER PILOT
AIR INLET HOLE
l
turn heater off (see To Turn Off
Gas To Appliance on page 12 for
non-thermostat model and page
11 for thermostat model).
see Troubleshooting on pages 14
through 16.
Figure 20 shows a correct pilot
flame pattern. Figure 21 shows an
incorrect pilot flame pattern. The
incorrect pilot flame 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 21:
We recommend that you clean the
unit every 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
l
WARNING: If yellow tipping
occurs, your heater could produce
increased levels of carbon
monoxide. If burner flame pattern
shows yellow tipping, follow instruc-
tions at bottom of this page.
air no greater than
30 PSl.
Your local computer store, hardware
store. or home center may carry com-
pressed air in a can. You can use a
vacuum cleaner in the blow position. If
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 pilot assembly.
1. Shut off the unit, including thepilot
Allow the unit to cool for
at least thirty minutes.
l
turn heater off (see To Turn
Off Gas To Appliance on page
12 for non-thermostat model or
page 11 for thermostat model)
see Troubleshooting pages 14
through 16.
Notice: Do not mistake orange
flames with yellow tipping. Dirt or
other fine particles enter the heater
a n d b u r n c a u s i n g b r i e f
patches of orange flame.
l
2. Inspect burner and pilot for dust
and dirt.
3. Blow air through the ports/slots
and holes in the burner.
Also, clean the pilot assembly . A
yellow tip on the pilot flame indi-
cates dust and dirt in the pilot
assembly. There is a small pilot air
inlet hole about two inches from
where the pilot flame comes out of
the pilot assembly (see Figure 24).
With the unit off lightly blow air through
the air inlet hole. You may blow through
Figure 22 - Correct Burner Flame
Pattern
Figure 20 - Correct Pilot Flame
Pattern
a drinking straw if
not available.
compressed air is
Figure 23 - Incorrect Burner
Flame Pattern
Figure 21 - Incorrect Pilot Flame
Pattern
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before servicing.
Figure 24 - Pilot Inlet Air Hole
CAUTION: You must keep control
CLEANING HEATER CABINET
Air Passageways
areas, burner, and circulating air
pas-
sageways of heater clean. Inspect these
areas of heater before each use. Have
heater Inspected yearly by a qualified
service person. Heater may need more
frequent cleaning due to excessive lint
l
Use
pressurized air to clean.
Exterior
Use a soft cloth dampened with
a
vacuum cleaner or
l
f r o m c a r p e t i n g ,
material, pet hair, etc.
b e d d i n g
a mild soap and water mixture.
Wipe the cabinet to remove dust.
13
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TROUBLESHOOTING
Note :
All
troubleshooting
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot. This can damage
ODS/pilot unit.
WARNING: Only a qualified
service person should service and
repair heater.
items are listed in order of
operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
When ignitor button is pressed in,
there is no spark at ODS/pilot.
1. Ignitor electrode is positioned
wrong.
1. Replace ignitor.
2. Replace ignitor.
2. Ignitor electrode is broken.
3. Ignitor electrode is not connected
to ignitor cable.
3. Reconnect ignitor cable.
4. Free ignitor cable if pinched by
4. Ignitor cable pinched or wet.
any
metal or tubing. Keep
ignitor cable dry.
5. Replace ignitor cable.
6. Replace piezo ignitor.
5. Broken ignitor cable.
6. Bad piezo ignitor.
When ignitor button is pressed in, 1. Gas supply turned off or
1. Turn on gas supply or open
equipment shutoff valve.
there is a spark at ODS/pilot but no
ignition.
equipment shutoff valve is closed.
2. Control knob not fully pressed in
while pressing ignitor button.
2. Fully press in control knob
while pressing ignitor button.
3. Continue holding down control
knob. Repeat igniting operation
until air is removed.
3. Air in gas lines when installed.
4. ODS/pilot is clogged.
4. Clean ODS/pilot (see Cleaning
and Maintenamce, Page 13) or
replace ODS/pilot assembly.
5. Gas regulator setting is not correct
6. Control knob not in PILOT position.
5. Replace gas regulator.
6. Turn control knob to PILOT position.
ODS/pilot lights but flame goes out 1. Control knob is not fully pressed
1. Press in control knob fully.
when control knob is released.
in.
2. Control knob is not pressed in
long enough.
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds.
3. Equipment shutoff valve is not
fully open.
3. Fully open equipment shutoff valve.
4. Thermocouple connection is loose
at control valve.
4. Hand tighten until snug, then
tighten 1/4 turn more.
5
Pilot flame is not touching thermo-
couple, This allows
5. A) Contact local natural gas
company.
thermocouple
pilot flame to go out.
This problem could be caused
by one or both of the following:
A) Low gas pressure.
to cool, causing
B) Clean ODS/pilot (see Cleaning
and Maintenance, Page 13) or
replace ODS/pilot assembly.
B) Dirty
or
partially clogged
ODS/pilot.
6. Thermocouple damaged.
7. Control valve damaged.
6. Replace thermocouple.
7. Contact Dealer or PRO-COM.
14
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TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Burner(s)does not light after
ODS/pilot is lit.
1. Burner orifice is clogged.
1. Clean burner orifice (see Cleaning
and Maintenance, Page 13) or
replace burner orifice.
2. Burner orifice diameter is too small.
3. Inlet gas pressure is too low.
2. Replace burner orifice.
3. Contact local natural gas company.
Delayed ignition of burner(s).
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Contact local natural gas company.
2. Clean burner (see Cleaning and
Maintenance, Page 13) or replace
burner orifice.
Burner backfiring during combustion.
1. Burner orifice is clogged or
damaged.
1. Clean burner orifice (see Cleaning
and Maintenance, Page 13) or
replace.
2. Burner is damaged.
3. Gas regulator is defective.
2. Contact Dealer or PRO-COM.
3. Replace gas regulator.
Yellow flame during burner
combustion.
1. Not enough air.
1. Check burner for dirt and debris.
If found, clean burner(see Cleaning
And Maintenance, Page 13).
2. Gas regulator defective.
2. Replace gas regulator.
3. Inlet gas pressure is too low .
3. Contact local natural gas company.
Slight smoke or odor during
initial operation.
1. Residues from manufacturing
processes
1. Problem will stop after a few hours
of operation.
.
Heater produces a whistling noise
when burner is lit.
1. Turning control knob to HI position
when burner is cold.
2. Air in gas line.
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 natural gas company.
3. Air passageways on heater are
3. Observe
minimum installation
blocked.
clearances (see Figure 4, page 7).
4. Clean burner (see Cleaning and
Maintenance, Page 13) or replace
burner orifice.
4. Dirty or partially clogged burner
orifice.
Heater produces a clicking/ticking
noise just after burner is lit or
shut off.
1. Metal is expanding while heating
or contracting while cooling.
1. This is common with most
heaters. if noise is excessive,
contact qualified service person.
White powder residue forming within
burner box or on adjacent
walls or furniture.
1. When heated the vapors from
furniture polish, wax, carpet
cleaners, etc. turn into white
powder residue.
1. Turn heater off when using
furniture polish, wax, carpet
cleaner, or similar products.
15
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TROUBLESHOOTING
Continued
WARNING: If you smell gas
l
l
l
l
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 cal l your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
l
If you cannot reach your gas supplier, call the fire department.
IMPORTANT : Operating heater where impurities in air exist may create odors. Clean-
ing 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.
POSSIBLE CAUSE
OBSERVED PROBLEM
REMEDY
1. Heater is burning vapors from
paint, hair spray, glues, etc.
(See IMPORTANT statement
above).
Heater produces unwanted odors.
1. Ventilate room. Stop using odor
causing products while heater
is running.
2. Gas leak. See Warning
Statement at top of page.
2. Locate and correct all leaks(see
Checking Gas Connections,
Page 10).
1. Not enough fresh air is available.
2. Low line pressure.
Heater shuts off in use (ODS operates).
1. Open window and/or door for
ventilation.
2. Contact local natural gas
company.
3. ODS/pilot is partially clogged.
3. Clean ODS/pilot (see Cleaning
Page 12).
1. Gas leak. See Warning
Statement at top of page.
1. Locate and correct all leaks(see
Checking Gas Connections,
Page 10).
Gas odor exists even when control
knob is in OFF position.
2. Control valve is defective.
2. Contact Dealer or PRO-COM
1. Foreign matter between control
valve and burner.
1. Take apart gas tubing and
remove foreign matter.
Gas odor during combustion.
2. Gas
leak.
See Warning
2. Locate and correct all leaks
Statement at top of page.
(see
Checking
Gas
Connections, Page 10).
1. Not enough combustion/ventilation
air.
1. Refer to Air for Combustion and
Moisture/condensation noticed on
windows.
Ventilation requirements, Page
4.
16
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SPECIFICATIONS
MN300HGA
15,000/30,000
Natural Only
Piezo
MN300TGA
14,000/30,000
Natural Only
Piezo
Btu(available)
Gas Type
Ignition
Pressure Regulator Setting
3"W.C.
3"W.C
Inlet Gas Pressure (inches of water)
Maximum
10.5"
4"
10.5"
4"
Minimum
Dimensions, Inches (HxWxD)
Heater
23 1/2 26 5/8 8
23 1/2 26 5/8 8
×
×
×
×
Carton
26 1/2 28 1/2 91/4
26 1/2 28 1/2 91/4
×
×
×
×
Weight (pounds)
Heater
26
31
26
31
Shipping
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
For all models, provides better heat
ACCESSORIES
REPLACEMENT PARTS
Note: Use only original replacement
parts. This will protect your warranty
coverage for parts replaced under
warranty.
distribution. Makes heater or efficient.
Complete installation and operating
instructions included.
Thermostatically-controlled PF06-
YJLF-B, includes three settings
ON/OFF/AUTO
Purchase these heater accessories
from your local dealer. If they can
not supply these accessories,
contact PRO-COM for information.
You can also write to the address
listed on the back page of this
manual.
PARTS UNDER WARRANTY
Contact authorized dealer from
whom you purchased this product.
If they are unable to supply original
replacement part(s), call the number
on the back of this manual. When
contacting your dealer or PRO-COM,
have ready:
l
l
l
your name
your address
model and serial numbers of
your heater
l
l
how heater was malfunctioning
type of gas used (propane/LP or
natural gas)
l
l
purchase date
Warranty Card
Usually, we will ask you to return the
defective part to the factory.
FAN PF06-YJLF-B
EQUIPMENT SHUTOFF VALVE
For all models. Equipment shutoff
valve with 1/8" NPT tap. This part
is not currently available from
PRO-COM.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this
product. If they can’t supply
original replacement part(s), contact
PRO-COM.
TECHNICAL SERVICE
You may have further questions
about installation, operation, or
troubleshooting. If so, contact
PRO-COM.The information is listed
on the back of manual.
17
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ILLUSTRATED PARTS
BREAKDOWN
MN300TGA
ODS/Pilot Assembly
18
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This list contains replaceable parts for your heater. When ordering replacement
parts, follow the instructions listed under Replacement Parts on page17 of this
manual.
PARTS LIST
MN300TGA
MN300TGA
KEY
NO.
PART NO.
QTY
DESCRIPTION
Cabinet Assembly
Lower Front Panel Assembly
Reflector Unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
24_1
24_2
25
26
27
MB10052
MB09052
MB11052
ML089-01
ML157-01
MB29001
ML069-02
SIT545-250
845-4.8x60Z
ML111-01
ML083-03
ML073-01
NRV81FI-3
96-4Z
ML079-01
MB40006
MB40022
MB40023
NBB30-000B1
ML101-01
ML091-02
ML103-01
ML104-01
1
1
1
1
1
1
12
1
2
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
Steel Wind Shield
Middle Panel
Grill Guard Assembly
Self Tapping Screw
Thermostat Valve Assembly
Screws
Thermostat Valve Base/Bracket
Ignitor Assembly
Ignitor Line
Pressure Regulator
Washer
Self Locking Screw
Main Inlet Tube Assembly
ODS Line Assembly
Burner Inlet Tube Assembly
Burner
Burner connector
Injector
Left Burner Support Bracket
Right Burner Support Bracket
ND1103x800x9 ODS/pilot Assembly
ND0803-8
ND0807
ML105-03
6170-5Z
Thermocouple
Ignitor Electrode
ODS Upper Deflector
Nut
ML060-01
Mounting Bracket
Assembly Hardware
AGA/CSA Label
Gas Instruction Decal
Inside Warning Label
Thermostat Sensing Bulb Clip
MB28001
ML070-27
ML071-01
ML072-01
ML065-01
1
1
1
1
2
19
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ILLUSTRATED PARTS
BREAKDOWN
MN300HGA
ODS/Pllot Assembly
20
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PARTS LIST
MN300HGA
This list contains replaceable parts for your heater. When ordering replace-
ment parts, follow the instructions listed under Replacement Parts on page17
of this manual.
MN300HGA
KEY
PART NO.
QIY
DESCRIPTION
NO.
MB10053
MB09051
MB11052
ML089-01
MB29001
ML157-01
ML083-03
ML069-02
NV2020-14
ML073-01
MB16002
ML029-01
NRV81FI-3
96-4Z
ML079-01
MB40016
MB40018
MB40019
MB40020
MB40021
ML096-01
MB40017
NBB30-000B1
ML101-01
ML091-01
ML103-01
ML104-01
ND1103x800x9
ND0803-8
ND0807
1
1
1
1
1
1
1
12
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
3
4
5
6
7
8
9
Cabinet Assembly
Lower Front Panel Assembly
Reflector Unit
Steel Wind Shield
Grill Guard Assembly
Middle Panel
Ignitor Assembly
Self Tapping Screw
Control Valve
Ignitor Line
Control Knob
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
28-1
28-2
29
30
31
Control Valve Fixed Nut
Pressure Regulator
Washer
Self Locking Screw
Main Inlet Tube Assembly
ODS Line Assembly
Lower Gas Outline Tube Assembly
Medium Gas Outline Tube Assembly
High Gas Outline Tube Assembly
4-Way Connector
Burner Inlet Tube Assembly
Burner
Burner Connector
Injector
Left Burner Support Bracket
Right Burner Support Bracket
ODS/pilot Assembly
Thermocouple
Ignitor Electrode
ODS Upper Deflector
Nut
ML105-03
6170-5Z
ML060-01
Mounting Bracket
Assembly Hardware
AGA/CSA Label
Gas Instruction Decal
Inside Warning Label
Thermostat Sensing Bulb Clip
MB28001
ML160-25
ML071-01
ML072-01
ML065-01
1
1
1
1
2
21
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