INFRARED VENT-FREE
PROPANE/LP GAS
SPACE 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.
ML150TPA
ML250TPA
ML150HPA
ML250HPA
Installation and service must be performed by a
qualified installer, service agency or gas
supplier.
Table of Contents
Important Safety Information.................................2
Product Features.....................................................3
Proper Ventilation & FreshAir..............................4
Installation................................................................6
OperatingYour Heater............................................10
Cleaning & Maintenance.......................................13
Trouble Shooting...................................................14
Specifications..........................................................17
PartsList..................................................................19
WARNING: Improper
installation,
adjustment, alteration, service or mainte-
nance 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 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.
WARNING: This is an unvented gas-
fired heater. It uses air (oxygen) from the
room in which it is installed. Provi-
sions for adequate combustion and ventila-
tion air must
be provided. Refer to Air For Com-
bustion and Ventilation section on page 4
of this manual.
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM
HEATERS
Water vapor is a by-product of gas combustion.An
unvented room heater productes approximately one (1)
ounce (30ml) of water for every 1,000 BTU’s (.3KW’s) of
gas input per hour. Refer to page 3.
*Aftermarket: Completion of sale, not for purpose of
resale, from the manufacturer.
CONTINENTAL APPLIANCE INC/U.S. OFFICE
5 Musick
Irvine
4600 Highlands Parkway S.E.
Suite # D/E
Installer: Please leave these instructions with the
consumer.
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.
Consumer: Please retain these instructions for
future use.
TOLL FREE NUMBER: 1-877-886-5989
PR-ML062-12-0803
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PRODUCT FEATURES
Figure1-Vent-Free Propane/LP Gas Heater
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 ANSI Z223.1,
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.
1 Batterymarch Park
Quincy, MA 02269-9101
THERMOSTATIC HEAT
UNPACKING
CONTROL ON THERMOSTAT
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.
MODELS
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 room heater productes approximately one (1)
ounce (30ml) of wter for every 1,000 BTU’s (.3KW’s) of
gas input per hour.
Unvented room heaters are recommended as
supplemental heat (a room) rather than a primary heat
source (an entire house) .In most supplemental heat
application, the water vapor does not create a problem.
In most applications, the water vapor enhances the low
humidity atmosphere experience during cold weather.
The following steps will help insure that water vapor
does not become a problem.
1. Be sure the heater is sized properly for the
application, including ample combusion air and
circulation air.
2. If high humidity is experienced, a dehumidifier may
be used to help lower the water vapor content of the
air.
3. Do not use an unvented room heater as the primary
heat source.
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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
Confined and
Unconfined Space
FRESH AIR FOR
COMBUSTION AND
The National Fuel Gas Code 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
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 ing instructions to
insure proper fresh air for this
and other fuel-burning
construction
unless
and an unconfined space as
a
the 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
the space 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.
which the
PROVIDING 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/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
tig ht
c onst ru ct ion
unl ess
provisions are provided for
adequate
combustion
and
a r e
ventilation ai r.
A d j o i n i n g
r o o m s
*
communicating only if there are
dooles passageways or ventilation
grills between them.
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.
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 size20ft. (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, ANSI Z223.1/NFPA 54, Air for Combustion and Ventilation, 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
18,000
58,000
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)
58,000 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/ANSI 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 ducts: 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/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 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
NOTICE: This heater is
equip-ment shutoff valve with 1/8"
NPT tap is an acceptable
alternative
connection. Purchase the optional
CSA/AGA design certified
equipment shutoff valve from your
dealer. See Accessories, page 17.
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 test gauge
to wall
heater. Inst alling
next to vinyl or cloth wall
co ve ri ngs or ope ra ti ng
surfaces next to
heater
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 Propane/LP gas. If your
gas supply is not Propane/LP, 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.
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piping (check local codes)
sealant (resistant to Propane/LP gas)
equipment shutoff valve*
ground joint union
CAUTION: If you install the
heater in a home garage
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heater pilot and burner must
be at least 18 inches above
floor.
test gauge connection*
sediment trap
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locate heater where moving
vehicle will not hit it.
tee joint
pipe wrench
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INSTALLATION
FASTENING HEATER TO WALL
Mounting Bracket
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
suits your needs. Either method
will provide a secure hold for the
mounting bracket.
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.
Marking Screw Locations
1. Tape mounting bracket to wall
where heater will be located.
Make sure mounting bracket is
level.
Figure 6 -Mounting Bracket
Location
WARNING:
Maintain
minimum clearances shown in
Figure 8. If you can, provide
greater clearances from floor
and joining wall.
Removing Lower Front Panel Of
Heater.
1. Remove two screws near
bottom corners of front panel.
2. Pull bottom of lower front panel
forward, then down (see Figure
7).
Figure 4 -Mounting Clearances As
Viewed From Front Of Heater
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.
IMPORTANT: Vent-free
heaters add moisture to the
air. Although this is beneficial,
installing heater in rooms
without enough ventilation air
3. Remove tape and mounting
bracket from wall.
may cause mildew to
form
from too much moisture. See
Fresh Air for Combustion and
Ventilation, pages 4 and 5.
INSTALLING THERMOSTAT
SENSING BULB
For T-Stat Models Only
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
Model ML250HPA ML250TPA
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
m ounting
bracket to wall only in one of two
ways:
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching to Wall Stud: This
method provides the strongest
hold. Insert mounting screws
through mounting bracket and
into wall studs.
Model ML150HPA ML150TPA
Figure 8 - Mounting Bracket
Clearances
Figure 5 - Moving Thermostat
Sensing Bulb
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INSTALLATION
Attaching Mounting Bracket to
Wall
IMPORTANT: Do not
hammer
key! For thick walls
(over 1/2" thick) or solid walls,
do not pop open wings.
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
Figure 12 - Installing Bottom
Mounting Screws
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.
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
Figure 10 - Popping Open Anchor
Wing For Thin Walls
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.
into wall stud, drill holes at
marked locations using 9/64"
drill bit.
Attaching to Wall Anchor
Method
Placing Heater on Mounting
Bracket
For attaching mounting bracket to
hollow walls (wall areas between
studs) or solid walls (concrete or
masonry)
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.
5. Replace heater onto mounting
bracket.
6. Place spacers between bottom
mounting holes and wall anchor
or drilled holes.
1. Locate two horizontal slots on
back panel of heater (see
Figure 11).
2. Place heater onto mounting
bracket. Slide horizontal slots
7. Hold spacer in place with one
hand. With other hand, insert
onto stand-out
mounting bracket.
tabs
on
mounting
screw
through
bottom mounting hole and
spacer. Place tip of screw in
opening of wall anchor or drilled
holes .
8. Tighten both screws until heater
is firmly secured to wall. Do not
over tighten.
l Note: Do not replace lower front
panel at this time. Replace lower
front panel after making gas
connections and checking for
leaks (see pages 9 and 10).
Figure 9 - Folding Anchor
Figure 11 - Mounting Heater Onto
Mounting Bracket
3. Insert wall anchor (wings
first) into hole. Tap anchor
flush to wall.
Installing Bottom Mounting
Screws
1. Locate two bottom mounting
holes. These holes are near
4. For thin walls (1/2" or less),
insert red key into wall
anchor. Push red key to
"pop" open anchor wings
(see Figure 10).
bottom on
back panel of
heater(see Figure 12).
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INSTALLATION
CONNECTING TO GAS SUPPLY
WARNING: qualified
A
service person must connect
heater to gas supply. Follow all
local codes.
r
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection
to the pressure regulator.
CAUTION: Never connect
heater directly to
the
propane/LP supply. This heater
requires an external regulator
(not supplied). Install the
external regulator between the
heater and propane/LP supply.
The installer must supply an
external regulator. The external
regulator will reduce incoming gas
pressure. You must reduce
incoming gas pressure to between
11 and 14 inches of water. If you
do not reduce incoming gas
pressure, heater regulator damage
could occur. Install external
regulator with the vent pointing
down as shown in Figure 13.
Pointing the vent down protects it
from freezing rain or sleet.
Figure 14 -Gas Connection
*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.
Apply pipe joint sealant lightly to
male threads. This will prevent
CAUTION: Use only new, black
iron or steel pipe. Internally-tinned
excess sealant from going into
copper tubing may be used in
pipe. Excess sealant in pipe could
result in clogged heater valves.
certain areas. Check your local
codes. Use pipe of large enough
diameter to allow proper gas volume
to heater. If pipe is too small,
undue loss of pressure will occur.
CAUTION: Use pipe joint
sealant that is resistant to
liquid petroleum (LP) gas.
Typical Inlet Pipe Diameters
All models up to 20,000 BTU’s use
3/8’’ or greater pipe;
All models 25,000 BTU’s and higher,
use 1/2” or greater pipe.
Install sediment trap in supply line
as shown in Figure 14. Locate
sediment trap where it is within
reach
for cleaning. Locate
trap where trapped
sediment
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
upstream from heater(see Figure 14).
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.
Figure 13 - External Regulator with
Vent Pointing Down
WARING:Do not over tighten gas
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.
connections.
IMPORTANT:
Hold pressure
regulator with wrench when
connecting it to gas piping and/or
fittings.
9
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OPERATING YOUR HEATER
INSTALLATION
NON-THERMOSTAT MODELS
CHECKING GAS
CONNECTIONS
Pressure Testing Heater Gas
Connections
nFOR YOUR SAFETYn
READ BEFORE LIGHTING
WARNING: Test all gas
1. Open equipment shutoff valve
(see Figure 15).
2. Open propane/LP supply tank
valve.
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 16 ). 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.
WARNING: If you do not
follow these instructions exactly,
a fire or explosion may result
in causing property damage,
personal injury or loss of life.
WARNING: Never use an
open flame to check for a
leak. Apply a mixture of liquid
soap and water
to all joints.
Bubbles forming show a leak.
Correct all leaks at once.
A. When lighting the pilot, follow
these instructions exactly.
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of
1/2 PSIG (3.5 K Pa)
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 .
5. Correct all leaks at once.
6. Light heater (see Operating
Heater, pages 10 and 11 for
1. Disconnect appliance with its
appliance
main
gas valve
non-thermostat
models
or
(control valve) and equipment
shutoff valve from gas supply
piping system. Pressures in
excess of 1/2 psig will damage
heater regulator.
page 12 and 13 for thermostat
models). Check the rest of the
internal joints for leaks.
WHAT TO DO IF YOU SMELL GAS
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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.
7. Turn off heater (see To Turn Off
Gas to Appliance, page 11 for
non-thermostat models or page
12 for thermostat models).
2. Cap off open end of gas pipe
where equipment shutoff valve
was connected.
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Immediately
supplier from
phone. Follow
supplier’s instructions.
If you cannot reach your
gas supplier, call the fire
department.
call
a
your gas
neighbor’s
8. Replace lower front panel.
3. Pressurize
system
supply
by either using
piping
the
gas
compressed air or opening
propane/LP supply tank valve.
4. Check all joints of 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. Reconnect heater and equipment
shutoff valve to gas supply. Check
reconnected fittings for leaks.
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.
Figure 15 -Equipment Shutoff Valve
Test Pressures Equal To or
Less Than 1/2 PSIG (3.5 K Pa)
1. Close equipment shutoff valve
(see Figure 15).
2. Pressurize supply piping system
by either using compressed air
or opening propane/LP supply
tank valve.
3. Check all joints from propane/LP
supply tank to equipment shutoff
valve (see Figure 16). 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.
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.
Figure 16 -Checking Gas Joints
4. Correct all leaks at once.
10
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OPERATING YOUR HEATER
Slightly press in control knob and
turn counterclockwise to the
Manual Control Models
LOW,MEDIUM, or HIGH position
(see Figure 19).
nLIGHTINGn
INSTRUCTIONS
IMPORTANT: Release downward
pressure while turning control knob.
Control knob will lock at the desired
position.
1. STOP! Read
the safety
information on the side of
heater.
2. Check that gas supply to
heater is on.
Figure 17 - Control Knob in The
OFF Position
nTO TURN OFFn
GAS TO APPLIANCE
3. Push in gas control knob
slightly and turn clockwise
the OFF position.
to
Shutting Off Heater
1. Turn control knob clockwise
to the OFF position.
NOTE: Knob cannot be turned from
“PILOT” to “OFF” unless knob is
pushed in slightly. Do not force.
4. Wait five (5) minutes to clear
out any air. Then smell for gas,
including near the floor. If you
smell gas,STOP! Follow “B” in
the safety information on the
side of the heater. If you do not
smell gas, go to the next step.
5. Push in gas control slightly
and turn counterclockwise
2. Turn off all electric power to
the appliance if service is to be
performed.
Shutting Off Burner Only ( pilot
stays lit)
Figure 18 - Pilot
Turn control knob clockwise
to the PILOT/IGN position.
nTO SELECTn
HEATING LEVEL
nMANUAL LIGHTINGn
PROCEDURE
1. Remove lower front panel (see
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.
5. Replace lower front panel.
CAUTION: Do not try to
adjust heating levels by using
the equipment shutoff valve.
to “PILOT/IGN” and depress
for five(5) seconds
NOTE: The first time that the
heater is operated after connecting
the gas supply , the control knob
should be depressed for about thirty
(30) seconds. This will allow air to
bleed from the gas system.
WARNING: When running
heater,set control knob at LOW,
MEDIUM, or HIGH locked
positions. Never set control knob
between locked positions. Poor
combustion and higher levels of
carbon monoxide may result.
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.
7. Keep control knob depressed
for ten (10) seconds after
lighting pilot. If pilot goes out,
repeat steps 5, 6 and 7.
8. To select the desired heating
level, partially press down the
control knob slightly and rotate
counterclockwise
. Release the
downward pressure on the knob
while continuing to turn until the
knob locks at the desired setting
position. Do not operate
between locked positions.
Figure 19 - Burner Patterns
11
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OPERATING YOUR HEATER
a qualified service person or gas
supplier for repairs.
nLIGHTINGn
THERMOSTAT MODELS
INSTRUCTIONS
Note: If pilot goes out, repeat
steps 3 through 7. This heater
has a safety interlock system.
Wait one(1)minute before lighting
pilot again.
1. STOP!
Read
the
safety
nFOR YOUR SAFETYn
READ BEFORE LIGHTING
information on the side of heater.
Make sure equipment shutoff
valve is fully open.
2.
WARNING: If you do not
follow these instructions exactly, a
fire or explosion may result
causing property damage,personal
injury or loss of life.
3. Turn control knob clockwise
to the OFF position.
8. Turn control knob counterclock-
wise
to desired heating level.
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 on the side of
heater. If you don’t smell
gas, go to the next step.
The main burner should light.
Set control knob to any heat
level between HI and LO.(see
Figure 20)
A. When lighting the pilot, follow these
instructions exactly.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
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.
5. Turn control knob counterclock-
wise to the PILOT position.
Press in control knob for
five(5) seconds. (see Figure 20).
Note: You may be running
this heater for the first time
after hooking up to gas supply.
If so, the control knob may
need to be pressed in for 30
seconds. This will allow air to
bleed from the gas system.
WHAT TO DO IF YOU SMELL GAS
l
l
Do not
appliance.
Do not touch any electric
switch, do not use any phone
in your building.
try to light any
Figure 20 - Control Knob in The
OFF Position
l
If control knob does not pop
up when released, contact a
qualified service person or
gas supplier for repairs.
l
l
Immediately call your gas
supplier from a neighbor’s
phone. Follow the gas
supplier’s instructions.
6. With control knob pressed in,
push down and release ignitor
button. This will light pilot. The
pilot is attached to the front of
burner. 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.
If you cannot 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 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.
Figure 21 - Pilot
nTO TURN OFFn
GAS TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
to the OFF position.
2. Turn off all electric power to the
appliance if service is to
be performed.
7.
Keep control
knob pressed
D.
Do not use this appliance if
in for 30 seconds after lighting
any part has been under water.
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.
pilot. After 30 seconds, release Shutting Off Burner Only (pilot
control knob. stays lit )
If control knob does not pop Turn control knob clockwise
up when released, contact
l
to
the PILOT position.
12
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OPERATING HEATER
Continued
CLEANING ODS/PILOT AND
BURNER
nTHERMOSTATn
CONTROL OPERATION
The thermostatic control used on
these Models differs from standard
thermostats.Standard thermostats sim-
ply turn on and off the burner. The
thermostat used on this heater
senses the room temperature. At
times the room may exceed the set
temperature.If so, the burner will
shut off.The burner will cycle back
on when room temperature drops
below the set temperature. The
temperature setting knob can be set
to any comfort level between HI
and LO.
Note: The thermostat sensing bulb
measures the temperature of air near
the heater cabinet. This may not al-
ways agree with room temperature
(depending on housing construction,
installation location, room size, open
air temperatures, etc.)Frequent use of
your heater will let you determine
your own comfort levels.
l
Use
a
vacuum cleaner,
pressurized air. or small, soft
bristled brush to clean.
Figure 23 - Correct Pilot Flame
Pattern
CLEANING BURNER
PILOT AIR INLET HOLE
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 com-
pressed 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.
Figure 24 - Incorrect Pilot Flame
Pattern
BURNER FLAME PATTERN
Figure 25 shows a correct burner
flame pattern. Figure 26 shows an
incorrect burner flame pattern. If
burner flame pattem is incorrect, as
shown in Figure 26.
l
turn heater off (see To Turn Off
Gas to Appliance. page 11 for
non-thermostat models or page
12 for thermostat models).
see Troubleshooting. pages 14
through 16.
1.
Shut off the unit, including the
pilot. Allow the unit to cool for
at least thirty minutes.
Inspect burner, pilot for dust
and dirt.
nMANUAL LIGHTINGn
l
PROCEDURE
2.
3.
1. Remove lower front panel (see
Figure 7 page 7).
Blow air through the ports/slots
and holes in the burner.
2. Follow steps 1 through 5 under
Lighting Instructions on page 12.
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 on page 12.
Clean the pilot assembly also. A
yellow tip on the pilot flame
indicates 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 27).
With the unit off, lightly blow air
through the air inlet hole. You may
blow through a drinking straw if
compressed air is not available.
Figure 25 - Correct Burner Flame
Pattern
5. Replace lower front panel.
nINSPECTING BURNERn
Check pilot flame pattern and
burner flame pattern often.
Figure 26 - Incorrect Burner
Flame Pattern
PILOT FLAME PATTERN
Figure 23 shows a correct pilot
flame pattern. Figure 24 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 healer will
shut down. If pilot flame pattern is
incorrect, as shown in Figure 24.
n CLEANING AND n
MAIN TENANCE
WARNING: Turn off heater
and let cool before servicing.
Figure 27 - Pilot Inlet Air Hole
CLEANING HEATER CABINET
Air Passageways
CAUTION: You must keep con-
trol areas, burner, and circulating
air passageways of heater clean. l Use
a
vacuum cleaner or
Inspect these areas of heater be-
l
turn heater off (see To Turn
Off Gas to Appliance. page 11
for non-thermostat models or
page 12 for thermostat models.)
see Troubleshooting, pages 14
through 16.
pressurized air to clean.
Exterior
fore each use. Have heater In-
spected yearly by a qualified ser-
vice person. Heater may need more
frequent cleaning due to excessive
lint from carpeting, bedding
material, pet hair, etc.
l
Use a soft cloth dampened with
a mild soap and water mixture.
Wipe the cabinet to remove dust.
l
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 and
control knob is pressed in and turned to
the PILOT position, there is no spark
at ODS/pilot.
1. Ignitor electrode is positioned
wrong.
2. Ignitor electrode is broken.
3. Ignitor electrode is not connected
to ignitor cable.
1. Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Ignitor cable pinched or wet.
4. Free ignitor cable if pinched by
any
metal or tubing. Keep
ignitor cable dry.
5. Broken ignitor cable.
6. Bad piezo ignitor.
5. Replace ignitor cable.
6. Replace piezo ignitor.
ODS/pilot lights but flame goes out
when control knob is released.
1. Gas supply turned off or
equipment shutoff valve is closed.
2. Control knob not fully pressed in
while pressing ignitor button.
1. Turn on gas supply or open
equipment shutoff valve.
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. Control knob not in PILOT position.
6. Gas regulator setting is not correct.
7. Depleted gas supply.
5. Turn control knob to PILOT position.
6. Replace gas regulator.
7. Contact local prapane/LP gas company.
When ignitor button is pressed and
control knob is press in and turned to
the PILOT position, there is a spark
at ODS/pilot but no ignition.
1. Control knob is not fully pressed in.
2. Control knob is not pressed in
long enough.
3. Equipment shutoff valve is not
fully open.
1. Press in control knob fully.
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds.
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
thermocouple, This allows
thermocouple to cool,causing pilot
flame to go out. This problem
could be caused by one or both
of the following:
5. A) Contact local propane/LP gas
company.
B) Clean ODS/pilot (see Cleaning
and Maintenance, Page 13) or
replace ODS/pilot assembly.
A) Low gas pressure
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. 2. Replace burner orifice.
3. Inlet gas pressure is too low.
3. Contact local Propane/LP gas company.
Delayed ignition of burner(s).
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Contact local Propane/LP 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 1. Clean burner orifice (see Cleaning
damaged.
and Maintenance, Page 13) or
replace burner orifice(s).
2. Burner is damaged.
3. Gas regulator is defective.
2. Contact Dealer or PRO-COM.
3. Replace gas regulator.
Burner Plaque(s) does not glow.
1. Plaque damaged.
1. Replace burner.
2. Control knob set between locked 2. Turn control knob until it locks at
positions.
desired setting.
3. Inlet gas pressure is too low.
3. Contact local propane/LP 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 clicking/ticking
noise just after burner is lit or
shut off.
1. Metal expanding while heating or 1. This is common with most heaters.
contracting while cooling.
If noise is excessive, contact
qualified ser vice person.
White powder residue forming within
burner box or on adjacent
walls or furniture.
1. When
furniture polish, wax, carpet
cleaners, etc. turn into white
powder residue.
heated, vapors from 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
REMEDY
OBSERVED PROBLEM
1. Heater is burning vapors from
paint, hair spray, glues, etc.
(See IMPORTANT statement
above).
1. Ventilate room. Stop using odor
causing products while heater
is running.
Heater produces unwanted odors.
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.
1. Open window and/or door for,
ventilation.
2. Contact local propane/LP gas
company.
Heater shuts off in use (ODS operates).
3. ODS/pilot is partially clogged.
3. Clean ODS/pilot (see Cleaning
Page 13).
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. Replace control valve.
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
ML250HPA
6,000/25,000
Propane/LP Only
Piezo
ML250TPA
25,000
ML150TPA
15,000
ML150HPA
6,000/15,000
Propane/LP Only
Piezo
Btu(available)
Propane/LP Only
Piezo
Propane/LP Only
Piezo
Gas Type
Ignition
10" W.C.
10" W.C.
10" W.C.
10" W.C.
Pressure Regulator setting
Inlet Gas Pressure (inches of water)
Maximum
14"
11"
14"
11"
14"
11"
14"
11"
Minimum
Dimensions, Inches (HxWxD)
Heater
23 1/2 26 5/8 8
23 1/2 26 5/8 8
23 1/2 19 1/4 8
23 1/2 19 1/4 8
×
×
×
×
×
×
×
×
26 1/2 28 1/2 9 1/4 26 1/2 28 1/2 9 1/4
26 1/2 21 3/4 9 1/4
26 1/2 21 3/4 9 1/4
×
×
×
×
×
×
×
×
Carton
Weight (pounds)
Heater
30
35
31
36
24
27
23
26
Shipping
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
ACCESSORIES
Optional FAN Kit
REPLACEMENT PARTS
Note: Use only original replacement
parts. This will protect your warranty
coverage for parts replaced under
warranty.
Purchase these heater accesso-
ries 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 front of this manual.
The optional fan kit, part PF06-YJLF-B
fits all models noted in this manual.
The fan has 3 settings ON/OFF/Auto.
The thermostatically controlled PF06-
PARTS UNDER WARRANTY
YJLF-B improves heater efficiency
and includes installation and operat-
ing instructions.
Contact authorized dealer from
whom you purchased this product.
If they are unable to supply original
replacement part(s), call the num-
ber on the front of manual. When con-
tacting your dealer or PRO-COM, have
ready:
l
l
l
your name
your address
model and serial numbers of
your heater
EQUIPMENT SHUTOFF VALVE
For all models. Equipment shutoff
valve with 1/8" NPT tap. This part
should be purchase.
l
l
how heater was malfunctioning
type of gas used (propane/LP or
natural gas)
purchase date
warranty card
l
l
Usually, we will ask you to return the
defective part to the factory.
PARTS NOT UNDER
WARRANTY
FLOOR MOUNTING STAND
Contact authorized dealers of this
product. If they can’t supply original
replacement part(s), call PRO-COM’s
phone number (877)886-5989.
TECHNICAL SERVICE
For locating heater on the floor, away
from a wall. Complete installation
instructions provided with floor
mounting stand.
You may have further questions
about installation, operation, or
troubleshooting. If so, contact
PRO-COM’S phone number (877)
886-5989.
FAN PF06-YJLF-B
17
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ILLUSTRATED
PARTS BREAKDOWN
ML150HPA
ODS/Pilot Asembly
18
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This list contains replaceable parts for your heater. When ordering relacement
parts, following the instructions listed under Replacement Part on page17 of this
manual.
PARTS LIST
ML150HPA
ML150HPA
KEY
NO.
QTY
PART NO.
DESCRIPTION
1
1
1
1
1
1
1
1
1
14
1
1
1
1
1
1
1
1
1
1
3
1
1
1
2
2
1
1
1
MB11054
MB09052
MB11053
MB19004
ND1808x400x9
ND0803-4
ND0807
ML026-01
ML069-02
NV2020-14
ML073-01
ML028-01
ML029-01
ML030-01
MB40024
MB40025
MB40026
MB40027
MB40028
ML090-02
MB16001
MB16003
NRV81FIL-10
96-4Z
Cabinet Assembly
Lower Front Panel Assembly
Deflector Unit
Burner Assembly
ODS Pilot Assembly
Thermocouple
2
3
4
5
5-1
5-2
6
7
8
lgnitor Electrode
ODS Mounting Bracket
Self Tapping Screw
Control Valve
9
Ignitor Line
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Control Valve Bracket
Control Valve Fixed Nut
Control Valve Main Inlet Nut
Main Inlet Tube Assembly
ODS Gas Line Assembly
Burner Gas Line Assembly A
Burner Gas Line Assembly B
Burner Gas Line Assembly C
Injector
Control Knob Assembly
Control Rod Assembly
Pressure Regulator
Washer
ML079-01
MB29002
ML083-03
ML060-01
Self Locking Screw
Grill Guard
Ignitor Assembly
Mounting Bracket
Hardware Assembly
CSA/AGA Decal
Gas Instruction Decal
Inside Warning Label
MB28001
ML070-04
ML071-02
ML072-01
1
1
1
1
19
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ILLUSTRATED PARTS
BREAKDOWN
ML250HPA
20
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PARTS LIST
ML250HPA
This list contains replaceable parts for your heater. When ordering relacement
parts, following the instruction listed under Replacement Parts on page17 of this
manual.
ML250HPA
KEY
DESCRIPTION
NO.
PART NO.
QTY
Cabinet Assembly
1
MB10051
MB09051
MB11051
MB19002
ND1808x400x9
ND0803-4
ND0807
1
1
1
1
1
1
1
1
14
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5
2
1
1
1
2
2
1
1
1
Lower Front Panel Assembly
Reflector Unit
Burner Assembly
ODS Pilot Assembly
Thermocouple
lgnitor Electrode
ODS Mounting Bracket
Self Tapping Screws
Control Valve
2
3
4
5
5-1
5-2
6
7
8
ML026-01
ML069-02
NV2020-14
ML073-01
ML028-01
ML029-01
ML030-01
MB40001
MB40002
MB40003
MB40012
MB40013
MB40004
MB40014
MB40015
MB40005
ML090-02
ML056-01
MB16001
MB16003
NRV81FIL-10
96-4Z
Ignitor Line
9
Control Valve Bracket
Control Valve Fixed Nut
Control Valve Main Inlet Nut
Main Inlet Tube Assembly
ODS Gas Line Assembly
Burner Gas Line Assembly C
Burner Gas Line Assembly C1
Burner Gas Line Assembly C2
Burner Gas Line Assembly B
Burner Gas Line Assembly B1
Burner Gas Line Assembly B2
Burner Gas Line Assembly A
Injector
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
“T” Joint
Control Knob Assembly
Control Rod Assembly
Pressure Regulator
Washer
Self Locking Screw
Grill Guard
ML079-01
MB29001
ML083-03
ML060-01
Ignitor Assembly
Mounting Bracket
Hardware Assembly
CSA/AGA Decal
Gas Instruction Decal
Inside Warning Label
MB28001
ML070-06
ML071-02
ML072-01
1
1
1
1
21
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ILLUSTRATED
PARTS BREAKDOWN
ML150TPA
ODS/Pilot Assembly
Burner Assembly
22
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This list contains replaceable parts for your heater. When ordering replacement parts,
following the instruction listed under Replacement Parts on page 17 of this manual.
PARTS LIST
ML150TPA
ML150TPA
KEY
DESCRIPTION
NO.
QTY
PART NO.
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
14
1
1
1
1
3
1
1
2
2
1
1
MB10055
MB09052
MB11053
MB19004
SIT545-000
ML111-01
845-4.8x60Z
ML060-01
MB40007
ML096-01
ML115-01
ML116-01
ML073-01
ND1808x800x9
ND0803-8
ND0807
ML026-01
ML069-02
MB40029
MB40030
MB40031
MB40032
ML090-02
MB40006
Cabinet Assembly
Lower Front Panel Assembly
Reflector Unit
2
3
4
5
6
7
8
9
Burner Assembly
Thermostat Valve Assembly
Thermostat Valve Base
Self Tapping Screw
Mounting Bracket
Thermostat Outlet Tube Assembly
4-way Connector
4-way Connector Bracket
4-way Connector Fixed Nut
Ignitor Line
10
11
12
13
14
14-1
14-2
15
16
17
18
19
20
21
22
23
24
25
26
27
ODS Pilot
Thermocouple
Ignitor Electrode
ODS Mounting Bracket
Self Tapping Screw
ODS Gas Line Assembly
“A” Burner Gas Line Assembly
“B” Burner Gas Line Assembly
“C” Burner Gas Line Assembly
Injector
Main Inlet Tube Assembly
Pressure Regulator
Washer
NRV81FI-10
96-4Z
ML079-01
MB29002
ML083-03
Self Locking Screw
Grill Guard
Ignitor Assembly
Hardware Assembly
CSA/AGA Decal
Gas Instruction Decal
Inside Warning Label
Thermostat Sensing Bulb Clip
MB28001
ML070-08
ML071-02
ML072-01
ML065-01
1
1
1
1
2
23
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ILLUSTRATED
PARTS BREAKDOWN
ML250TPA
ODS/Pilot Assembly
Burner Assembly
24
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This list contains replaceable parts for your heater. When ordering replacement
parts, following the instruction listed under Replacement Parts on page 17 of this
manual.
PARTS LIST
ML250TPA
ML250TPA
KEY
DESCRIPTION
NO.
QTY
PART NO.
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
14
1
1
1
1
1
1
1
1
5
2
1
1
2
2
1
1
MB10052
MB09051
MB11051
MB19002
SIT545-000
ML111-01
845-4.8x60Z
ML060-01
MB40007
ML096-01
ML115-01
ML116-01
ML073-01
ND1808x800x9
ND0803-8
ND0807
ML026-01
ML069-02
MB40008
MB40009
MB40012
MB40013
MB40010
MB40014
MB40015
MB40011
ML090-02
ML056-01
MB40006
Cabinet Assembly
2
3
4
5
6
7
8
9
Lower Front Panel Assembly
Reflector Unit
Burner Assembly
Thermostat Valve Assembly
Thermostat Valve Base
Self Tapping Screw
Mounting Bracket
Thermostat Outlet Tube Assembly
4-way Connector
4-way Connector Bracket
4-way Connector Fixed Nut
Ignitor Line
ODS Pilot
Thermocouple
Ignitor Electrode
ODS Mounting Bracket
Self Tapping Screw
ODS Gas Line Assembly
“C” Burner Gas Line Assembly
“C1” Burner Gas Line Assembly
“C2” Burner Gas Line Assembly
“B” Burner Gas Line Assembly
“B1” Burner Gas Line Assembly
“B2” Burner Gas Line Assembly
“A” Burner Gas Line Assembly
Injector
10
11
12
13
14
14-1
14-2
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
“T” Joint
Main Inlet Tube Assembly
Pressure Regulator
Washer
Self Locking Screw
NRV81FI-10
96-4Z
ML079-01
MB29001
ML083-03
Grill Guard
Ignitor Assembly
Hardware Assembly
CSA/AGA Decal
Gas Instruction Decal
Inside Warning Label
Thermostat Sensing Bulb Clip
MB28001
ML070-10
ML071-02
ML072-01
ML065-01
1
1
1
1
2
25
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