Procom Blue Flame User manual

1
CAUTION - FOR YOUR SAFETY
Vent-Free Gas Wall Heater
Blue Flame
WARNING:This appliance is
equipped for (Natural and Propane)
gas. Field conversion is not permitted
other than between natural or
propane gases.
PC-MD100TBA-1103-B
Model # MD100TBA
MD200TBA
MD300TBA
MD100HBA
MD200HBA
MD300HBA
MD200TBA-BB
MD300TBA-BB
MD200HBA-BB
MD300HBA-BB
This appliance may be installed in an aftermarket, permanently located, manufactured
(mobile) home, where not prohibited by local codes. This appliance is only for use with
propane or natural gas. This appliance is equipped with a simple means to switch
between propane and natural gas. Field conversion by any other means including the
use of a kit is not permitted.
This is an unvented gas-red 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 9 of this manual.
INSTALLER: Leave this manual with the appliance. CONSUMER: Retain this manual
for future reference.
Questions about installation, operation, or troubleshooting? Before returning to your retailer, contact our
customer service department at 1-877-886-5989, 8:00 a.m.- 4:30p.m., EST, Monday-Friday or e-mail
[email protected].
WARNING: IF THE INFORMATION IN THIS MANUAL IS NOT FOLLOWED
EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY
DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE.
– Do not store or use gasoline or other ammable vapors and liquids in vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
– Installation and service must be performed by a qualied installer, service agency
or the gas supplier.

2
2
TABLE OF CONTENTS
Important Safety Information ..............................................................................................................................5
Product Features................................................................................................................................................7
Preparing for Installation.....................................................................................................................................8
Air for Combustion & Ventilation.........................................................................................................................9
Installation ........................................................................................................................................................12
Operation .........................................................................................................................................................18
Care and Maintenance .................................................................................................................................22
Troubleshooting .................................................................................................................................23
Replacement Parts.............................................................................................................................26
WARNING: READ THE INSTALLATION & OPERATION INSTRUCTIONS BEFORE USING THIS APPLIANCE.
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this
heater. Improper use of this heater can cause serious injury or death from burns, re, explosion, and carbon
monoxide poisoning.
TABLE OF CONTENTS

3
PRODUCT SPECIFICATIONS
MODEL MD100TBA MD200TBA MD300TBA
BTU (available) 10,000 20,000 30,000
Gas Type Using Natural Gas Using Natural Gas Using Natural Gas
Pressure Regulator Setting 4 in. W.C. 4 in. W.C. 4 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 10.5 in. 10.5 in. 10.5 in.
Minimum * 5 in. 5 in. 5 in.
Gas Type Using Propane Gas Using Propane Gas Using Propane Gas
Pressure Regulator Setting 9 in. W.C. 9 in. W.C. 9 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 14 in. 14 in. 14 in.
Minimum * 11 in. 11 in. 11 in.
Ignition Electric Piezo Electric Piezo Electric Piezo
Dimensions, Inches (HxWxD)
Heater 19 1/8 × 14 1/8 × 6 3/8 23 1/2 × 19 1/4 × 8 23 1/2 x 26 5/8 x 8
Carton 22 ×16 3/4 × 8 1/8 26 1/2 × 21 3/4 × 9 1/4 26 1/2 x 28 1/2 x 9 1/4
Weight (Pounds)
Heater 14.6 22.2 28.1
Shipping 17.6 26..2 33.1
MODEL MD100HBA MD200HBA MD300HBA
BTU (available) 10,000 20,000 30,000
Gas Type Using Natural Gas Using Natural Gas Using Natural Gas
Pressure Regulator Setting 4 in. W.C. 4 in. W.C. 4 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 10.5 in. 10.5 in. 10.5 in.
Minimum * 5 in. 5 in. 5 in.
Gas Type Using Propane Gas Using Propane Gas Using Propane Gas
Pressure Regulator Setting 9 in. W.C. 9 in. W.C. 9 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 14 in. 14 in. 14 in.
Minimum * 11 in. 11 in. 11 in.
Ignition Electric Piezo Electric Piezo Electric Piezo
Dimensions, Inches (HxWxD)
Heater 19 1/8 × 14 1/8 × 6 3/8 23 1/2 × 19 1/4 × 8 23 1/2 x 26 5/8 x 8
Carton 22 ×16 3/4 × 8 1/8 26 1/2 × 21 3/4 × 9 1/4 26 1/2 x 28 1/2 x 9 1/4
Weight (Pounds)
Heater 14.1 21.2 27.1
Shipping 17.6 25.2 32.1

4
MODEL MD200TBA-BB MD300TBA-BB
BTU (available) 20,000 30,000
Gas Type Using Natural Gas Using Natural Gas
Pressure Regulator Setting 4 in. W.C. 4 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 10.5 in. 10.5 in.
Minimum * 5 in. 5 in.
Gas Type Using Propane Gas Using Propane Gas
Pressure Regulator Setting 9 in. W.C. 9 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 14 in. 14 in.
Minimum * 11 in. 11 in.
Ignition Electric Piezo Electric Piezo
Dimensions, Inches (HxWxD)
Heater 23 1/2 × 19 1/4 × 8 23 1/2 x 26 5/8 x 8
Carton 26 1/2 × 21 3/4 × 9 1/4 26 1/2 x 28 1/2 x 9 1/4
Weight (Pounds)
Heater 25.1 31
Shipping 29.1 36
MODEL MD200HBA-BB MD300HBA-BB
BTU (available) 20,000 30,000
Gas Type Using Natural Gas Using Natural Gas
Pressure Regulator Setting 4 in. W.C. 4 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 10.5 in. 10.5 in.
Minimum * 5 in. 5 in.
Gas Type Using Propane Gas Using Propane Gas
Pressure Regulator Setting 9 in. W.C. 9 in. W.C.
Inlet Gas Pressure* (inches of water) * For purposes of input adjustment.
Maximum 14 in. 14 in.
Minimum * 11 in. 11 in.
Ignition Electric Piezo Electric Piezo
Dimensions, Inches (HxWxD)
Heater 23 1/2 × 19 1/4 × 8 23 1/2 x 26 5/8 x 8
Carton 26 1/2 × 21 3/4 × 9 1/4 26 1/2 x 28 1/2 x 9 1/4
Weight (Pounds)
Heater 24.1 30
Shipping 28.1 35
PRODUCT SPECIFICATIONS

555
IMPORTANT SAFETY INFORMATION
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this
heater. Improper use of this heater can cause serious injury or death from burns, re, explosion, electrical shock, and
carbon monoxide poisoning.
Only a qualied installer, service agent, or local gas supplier may install and service this product.
WARNING: Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any
other appliance.
WARNING: This appliance can be used with propane or natural gas. It is shipped from the factory adjusted for
use with propane.
CARBON MONOXIDE POISONING: Early signs of carbon monoxide poisoning resemble the u with headache,
dizziness and/or nausea. If you have these signs, heater may not be working properly. Get fresh air at once!
Have heater serviced. Some people - pregnant women, persons with heart or lung disease, anemia, those
under the inuence of alcohol, those at high altitude - are more affected by carbon monoxide than others.
NATURAL AND PROPANE/LP GAS: Natural and Propane/LP gas are odorless. An odor-producing agent is
added to the gas. The odor helps you detect a gas leak. However, the odor added to the gas can fade. Gas may
be present even though no odor exists.
WARNING: Any change to this heater or its controls can be dangerous.
WARNING: Do not use any accessories not approved for use with this heater.
WARNING: Carefully supervise young children when they are in the room with the heater.
WARNING: Make sure grill guard is in place before running heater.
WARNING: Keep the appliance area clear and free from combustible materials, gasoline, and other am
mable vapors and liquids.
WARNING: Due to high temperatures, the appliance should be located out of trafc and away from furniture
and draperies.
WARNING: Heater becomes very hot when running . Keep children and adults away from hot surfaces to
avoid burns or clothing ignition. Heater will remain hot for a time after shutoff. Allow surfaces to cool before
touching.
WARNING: Do not place clothing or other ammable material on or near the appliance. Never place any
objects in the heater.
1. Do not place Propane/LP supply tank(s) inside any structure. Propane/LP supply tank(s) must be Placed
outdoors.
2. Do not install model #MD100TBA and MD100HBA in a bathroom. Do not install model #MD200TBA, MD200TBA-BB
MD200HBA, MD200HBA-BB, MD300TBA, MD300TBA-BB, MD300HBA and MD300HBA-BB in a bedroom or
bathroom.
3. This heater needs fresh air ventilation to run properly. This heater has an Oxygen Depletion Sensing (ODS)
safety shutoff system. The ODS shuts down the heater if not enough fresh air is available. See Air for
Combustion and Ventilation, pages 9 through 11. If heater keeps shutting off, see Troubleshooting, pages 23
through 25.
4. Keep all air openings in front and bottom of heater clear and free of debris. This will ensure enough air for
proper combustion.
IMPORTANT SAFETY INFORMATION

66
5. If heater shuts off, do not relight until you have provided fresh, outside air. If heater keeps shutting off, have it
serviced.
6. Do not run heater:
• Where ammable liquids or vapors are used or stored.
• Under dusty conditions.
7. Before using furniture polish, wax, carpet cleaner, or similar products, turn heater off. If heated, the vapors from
these products may create a white powder residue within burner box or on adjacent walls or furniture.
8. Always run heater with control knob at PILOT/IGN, LOW or HIGH locked positions. Never set control knob be
tween locked positions. Poor combustion and higher levels of carbon monoxide may result.
9. Do not use heater if any part has been under water. Immediately call a qualied service technician to inspect
the room heater and to replace any part of the control system and any gas control which has been under water.
10.Turn off and unplug blower on heater and let cool before servicing. Only a qualied service person should service-
and repair heater.
11. Operating heater above elevations of 4,500 feet could cause pilot outage.
12. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity.
QUALIFIED INSTALLING AGENCY
Only a qualied agency should install and replace gas piping, gas utilization equipment or accessories, and repair and
equipment servicing.The term “qualied agency” means any individual, rm, corporation, or company that either in
person or through a representative is engaged in and is responsible for:
a) Installing, testing, or replacing gas piping or
b) Connecting, installing, testing, repairing, or servicing equipment; that is experienced in such work; that is familiar
with all precautions required; and that has complied with all the requirement of the authority having jurisdiction.

7
PRODUCT FEATURES
SAFETY PILOT
This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot shuts off the
heater if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This heater is equipped with a piezo control system.
2 GAS OPTIONS CAPABLE
Your heater is equipped to operate on either Propane or Natural gas. The heater is shipped from the factory ready for
connecting to Propane. The heater can easily be changed to Natural gas by having your qualied installer follow the
instructions on page 16 and 17 and the markings on the heater.
THERMOSTATIC CONTROL ON THERMOSTAT MODEL
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.
LOCAL CODES
Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of The
National Fuel Gas Code, ANSI Z223.1/ NFPA 54.
*Available from:
American National Standards Institute, lnc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, lnc.
1 Batterymarch Park
Quincy, MA 02269-9101
State of Massachusetts: The installation must be made by a licensed plumber or gas tter in the Commonwealth
of Massachusetts. Sellers of unvented propane or natural gas-red supplemental room heaters shall provide to
each purchaser a copy of 527 CMR 30 upon sale of the unit.
In the State of Massachusetts, unvented propane or natural gas-red space heaters shall be prohibited in
bedrooms and bathrooms.
In the State of Massachusetts the gas cock must be a T-handle type. The State of Massachusetts requires that
a exible appliance connector cannot exceed three feet in length.

88
PREPARING FOR INSTALLATION
Before beginning assembly or operation of the product, make sure all parts are present. If any part is missing or dam-
aged, do not attempt to assemble, install or operate the product. Contact customer service for replacement parts.
Before installing heater, make sure you have the items listed below: (Not provided)
• piping (check local codes)
• sealant (resistant to natural gas and propane/LP gas)
• equipment shutoff valve*
• test gauge connection*
• sediment trap
• tee joint
• pipe wrench
• exible gas hose (check local codes)
* A CSA design-certied equipment shutoff valve with
1/8-inch NPT tap is an acceptable alternative to test
gauge connection. Purchase the optional CSA design-
certied equipment shutoff valve from your dealer.
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS
Water vapor is a by-product of gas combustion. An unvented room heater produces approximately one (1) ounce
(30 mL) of water for every 1,000 BTUs (.3 KWs) 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 applica-
tions, the water vapor does not create a problem. In most applications, the water vapor enhances the low humidity
atmosphere experienced during cold weather.
The following steps will help ensure that water vapor does not become a problem.
1. Be sure the heater is sized properly for the application, including ample combustion air and circulation air.
2. If high humidity is experienced, a dehumidier 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.
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to heater for shipping
3. Check heater for any shipping damage. If heater is damaged, promptly inform dealer where you bought heater.
Figure 1 - Vent-Free Gas Heater

99
AIR FOR COMBUSTION AND VENTILATION
WARNING: If the area in which the heater may be operated does not meet the required volume for indoor
combustion air, combustion and ventilation air shall be provided by one of the methods described in the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, the International Fuel Gas Code, or applicable local codes.
Providing Adequate Ventilation
All spaces in homes fall into one of the three following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 9 through 11 will help you classify your space and provide adequate ventilation.
Conned and Unconned Space
A conned space is a space whose volume is less than 50 cu. ft. per 1,000 BTU/hr (4.8 m^3 per kw) of the aggregate
input rating of all appliances installed in that space and an unconned space as a space whose volume is not less than
50 cubic feet per 1,000 BTU/hr (4.8 m^3 per kw) of the aggregate input rating of all appliances installed in that space.
Rooms connecting directly with the space in which the appliances are installed*, through openings not furnished with
doors, are considered a part of the unconned space.
This heater shall not be installed in a conned space or unusually tight construction unless provisions are provided for
adequate combustion and ventilation air.
* Adjoining rooms are connecting only if there are doorless passageways or ventilation grills between them.
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 dened as construction where:
a) Walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of one
perm (6×10-11kg per pa-sec-m2) or less with openings gasketed or sealed and
b) Weather stripping has been added on openable windows and on doors and
c) Caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and
oors, 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”. If your home does not meet all of the three criteria above, proceed to “Determining Fresh-Air Flow For
Heater Location”.

1010
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Conned or Unconned Space
Use this worksheet to determine if you have a conned or unconned 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 = cu. ft. (volume of space)
Example: Space size 20 ft. (length) × 16 ft. (width)×8 ft. (ceiling height) =2560 cu. 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)
3. Add the BTU/hr of all fuel burning appliances in the space.
*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)
56,000 BTU/hr (actual amount of BTU/hr used)
The space in the above example is a conned 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 ”
on next page.
b) Vent room directly to the outdoors. See “ Ventilation Air From Outdoors ” on next page.
c) Install a lower BTU/hr heater if lower BTU/hr size makes room unconned. If the actual BTU/hr used is less
than the maximum BTU/hr the space can support, the space is an unconned space. You will need no
additional fresh air ventilation.
Example:
Gas water heater 30,000 BTU/hr
Vent-free heater + 26,000 BTU/hr
Total = 56,000 BTU/hr
BTU/hr
BTU/hr
BTU/hr
BTU/hr
BTU/hr
BTU/hr
BTU/hr
Vent-free heater
Gas water heater*
Gas furnace
Vented gas heater
Gas heater logs
Other gas appliances* +
Total =

1111
Figure 3 - Ventilation Air from Outdoors
Figure 2 - Ventilation Air from Inside Building
WARNING: If the area in which the heater may be
operated does not meet the required volume for indoor
combustion air, combustion and ventilation air shall
be provided by one of the methods described in the
NATIONAL FUEL GAS CODE, ANSI Z223.1/
NFPA 54, the INTERNATIONAL FUEL GAS CODE, or
applicable local codes.
Ventilation Air From lnside Building
This fresh air would come from an adjoining unconned
space. When ventilating to an adjoining unconned
space, you must provide two permanent openings: one
within 12 inches of the ceiling and one within 12 inches
of the oor on the wall connecting the two spaces
(see options 1 and 2, Figure 2). You can also remove
the door into adjoining room (see option 3, Figure 2).
Follow the National Fuel Gas Code. ANSI Z223.1/
NFPA 54, Air for Combustion and Ventilation for
required size of entilation grills or ducts.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills or
ducts. You must provide two permanent openings: one
within 12 inches of the ceiling and one within 12 inches
of the oor. 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, ANSI Z223.1/ NFPA 54, 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. Heated air entering the attic will activate
the power vent. Rework worksheet, adding the space of
the adjoining unconned space. The combined spaces
must have enough fresh air to supply all appliances in
both spaces.

1212
Figure 4 - Mouting clearances as viewed from
front of heater (inches)
NOTICE: This heater is 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.
CAUTION: If you install the heater in a home garage:
• Heater pilot and burner must be at least 18 inches above the oor.
• Place heater where moving vehicle will not hit it.
WARNING: A qualied service person must install heater. Follow all local codes.
WARNING: Never install the heater
• in a bathroom - Model #MD100TBA and MD100HBA
• in a bedroom or bathroom - Model #MD200TBA, MD200TBA-BB MD200HBA, MD200HBA-BB, MD300TBA,
MD300TBA-BB, MD300HBA and MD300HBA-BB
• in a recreational vehicle
• where curtains, furniture, clothing, or other ammable objects are less than 36 inches from the front, top, or
sides of the heater
• in high trafc areas
• in windy or drafty areas
INSTALLATION
CAUTION: This heater creates warm air currents. These currents move heat to wall surfaces next to heater.
Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as tobacco
smoke, aromatic candles, cleaning uids, oil or kerosene lamps, etc.) in the air exist, may cause walls to discolor.
IMPORTANT: Vent-free heaters add moisture to the air. Although this is benecial, installing heater in rooms
without enough ventilation air may cause mildew to form too much moisture. See Air for Combustion and
Ventilation, pages 9 through 11.
Check Gas Type
Be sure your gas supply is right for your heater.
Otherwise, call dealer where you bought the
heater for proper type heater.
Clearances To Combustibles
Carefully follow the instructions below. This
heater is designed to be mounted on a wall or
set directly on the oor using approved base.
WARNING: Maintain the minimum clearances
shown in Figure 4. If you can, provide greater
clearances from oor, ceiling, and joining wall.
LOCATING HEATER
For convenience and efciency, install heater:
1) where there is easy access for operation,
inspection, and service.
2) In the coldest part of room.

13
Figure 5 - Mounting Bracket Location
FASTENING HEATER TO WALL
Mounting Bracket
The mounting bracket is located on back panel of heater (see Figure 5).
It has been taped there for shipping. Remove mounting bracket from
back panel.
Removing 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 6).
Methods For Attaching Mounting Bracket To Wall
Use only the last hole on each end of mounting bracket to attach bracket
to wall. Attach mounting bracket to a wall only in one of two ways:
1. Attaching to wall stud: This method provides the strongest hold.
Insert mounting screws through mounting bracket and into wall studs.
2. 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).
3. Decide which method better suits your needs. Either method will provide
a secure hold for the mounting bracket.
Marking Screw Locations
1. Tape mounting bracket to wall where heater will be located.
Make sure mounting bracket is level.
WARNING: Maintain minimum clearances shown in Figure 4. If you can, provide greater clearances from oor
and joining wall.
2. Mark screw locations on wall (see Figure 7).
Note: Mark only last hole on each end of mounting bracket. Insert mounting screws through these holes only.
3. Remove tape and mounting bracket from wall.
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 Wall Stud Method
For attaching mounting bracket to wall studs:
1. Drill holes at marked locations using 9/64-inch 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 rmly fastened to wall studs.
Figure 7 - Mounting Bracket
Clearances (inches)
Figure 6 - Mounting Bracket
Clearances (inches)
Model: MD100TBA MD100HBA
Model: MD200TBA MD200HBA
MD300TBA MD300HBA
MD200TBA-BB MD200HBA-BB
MD300TBA-BB MD300HBA-BB

14
Attaching to Wall Anchor Method
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-inch drill bit. For solid
walls (concrete or masonry), drill at least 1 inch deep.
2. Fold wall anchor as shown in Figure 8.
3. Insert wall anchor (wings rst) into hole. Tap anchor ush to
wall.
4. For thin walls (1/2 inch or less), insert red key into wall anchor.
Push red key to “pop” open anchor wings (see Figure 9).
IMPORTANT: Do not hammer anchor key! For thick walls (over
1/2 inch thick) or solid walls, do not pop open wings.
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 rmly fastened to wall.
Placing Heater On Mounting Bracket
1. Locate two horizontal slots on back panel of heater (see Figure
10).
2. Place heater onto mounting bracket. Slide horizontal slots onto
stand-out tabs on mounting bracket.
Figure 8 - Folding Anchor
Figure 9 - Popping Open
Anchor Wing For Thin Walls
Figure 10 - Mounting Heater
Onto Mounting Bracket

1515
WARNING: A qualied service technician must connect heater to gas supply. Follow all local codes.
WARNING: This appliance requires a 3/8-inch NPT (National Pipe Thread) inlet connection to the pressure
regulator.
WARNING: Never connect heater to private (non-utility) gas wells. This gas is commonly known as wellhead gas.
WARNING: Do not over-tighten gas connections.
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 1/2-in. diameter or greater to allow proper gas volume to heater. If pipe is
too small, undue loss of pressure will occur.
NATURAL GAS MODELS:
CAUTION: Check your gas line pressure before connecting heater to gas line. Gas line pressure must be no
greater than 10.5 inches of water. If gas line pressure is higher, heater regulator damage could occur.
PROPANE MODELS:
CAUTION: Never connect heater directly to the gas supply. This heater requires an external regulator (not
supplied). Install the external regulator between the heater and gas supply.
CAUTION: Avoid damage to regulator. Hold gas regulator with wrench when connecting into gas piping and/or
ttings.
CAUTION: Use pipe joint sealant that is resistant to gas (Propane or Natural Gas).
CONNECTING TO GAS SUPPLY
Figure 11 - Gas Connection (inches)
* Purchase the optional CSA design-certied equipment shutoff valve from your dealer.
Typical Inlet Pipe Diameters Use 3/8-inch black iron pipe or greater. Installation must include
an equipment shutoff valve, union, and plugged 1/8-inch NPT tap. Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from heater (see Figure 11).
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.

1616
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.
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 12. Pointing the vent down protects it from freezing rain or sleet.
Install sediment trap in supply line as shown in Figure 11. Place sediment trap
where it is within reach for cleaning. Place sediment trap where trapped 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 12 - External Regulator with
Vent Pointing Down
Continued
INSTALLATION
CAUTION: To avoid gas leakage at the inlet of regulator, a qualied installer or service technician must use steel
or metal hex plug with sealant.
For changing from propane to natural gas supply:
1. Remove top screw from cover plate, See Figure 13, and rotate to expose fuel selection device.
2. For NATURAL GAS, press knob using a at screwdriver with a blade with thickness of a quarter and turn knob
clockwise until the knob locks into the NG position (see Figure 14). Fuel selection device must be locked in
the NG position. Do not operate heater between locked positions!
3. Rotate and close cover over fuel selection device and reinstall screw.
4. Remove steel or metal hex plug (with wrench provided) from natural gas inlet of regulator and install into LP inlet of
regulator; use thread sealant to ensure that there are no leaks.
For changing from natural gas supply to propane supply:
1. Remove top screw from cover plate, See Figure 13, and rotate to expose fuel selection device.
2. For propane gas, press in knob using a flat screwdriver with a blade the thickness of a quarter and turn knob
counterclockwise until the knob locks into the LP position, see Figure 15. Fuel selection device must be
locked in the LP position. Do not operate heater between locked positions.
3. Rotate and close cover over fuel selection device and reinstall screw.
4. Remove steel or metal hex plug from liquid propane inlet of regulator and install into NG inlet of regulator; use
thread sealant to assure there are no leaks.
CAUTION: Two gas line installations at the same time are prohibited. The access plate to the simple switching means
shall not be opened while the heater is in operation.
This appliance can be used with propane or natural gas. It is shipped from the factory adjusted for use with propane.
Only a qualied installer or service technician can perform gas selection and connecting to gas supply.

1717
CHECKING GAS CONNECTIONS
Figure 16 - Equipment Shutoff Valve
Figure 17 - Fuel Supply
Figure 13 Figure 14 Figure 15
WARNING: Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once.
WARNING: Never use an open ame to check for a leak. Apply a mixture of liquid soap and water to all joints. If
bubbles form, there is a leak. Correct all leaks at once.
PRESSURE TESTING GAS SUPPLY PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG (3.5kPa)
1. Disconnect heater with its appliance main gas valve (control valve) and equipment shutoff valve from gas supply
piping system. Pressures in excess of 1/2 PSIG will damage heater regulator.
2. Cap off open end of gas pipe where equipment shutoff valve was connected.
3. Pressurize supply piping system by either using compressed air or opening
gas supply valve.
4. Check all joints of gas supply piping system. Apply mixture of liquid soap
and water to gas joints. If bubbles form, there may be a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve to gas suply. Check
reconnected ttings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 16).
2. Pressurize supply piping system by either using compressed air or
opening natural supply tank valve.
3. Check all joints from gas meter to equipment shutoff valve
(see Figure 17).
Apply mixture of liquid soap and water to gas joints. If bubbles
form, there is a leak.
4. Correct all leaks at once.

1818
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve (see Figure 16).
2. Open gas supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4. Remove front panel.
5. Check all joints from equipment shutoff valve to control valve (see Figure 16). Apply mixture of liquid soap and
water to gas joints. If bubbles form, there may be a leak.
6. Correct all leaks at once.
7. Light heater (see Lighting Instructions on page 19). Check all other internal joints for leaks.
8. Turn off heater (see “To Turn Off Gas Appliance” on page 18).
9. Replace lower front panel.
OPERATION
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property
damage, personal injury or loss of life.
A. When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING, smell all around the appliance area for gas. Be sure to smell next to the oor because
some gas is heavier than air and will settle on the oor.
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 qualied service technician or gas supplier. Forced or attempted repair may
result in a re or explosion.
D. Do not use this appliance if any part has been under water. Immediately call a qualied service technician to
inspect the appliance and to replace any part of the control system and any gas control which has been under
water.
WHAT TO DO IF YOU SMELL GAS
• 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.
• If you cannot reach your gas supplier, call the re department.

1919
LIGHTING INSTRUCTIONS
MD100TBA & MD200TBA & MD300TBA & MD200TBA-BB & MD300TBA-BB
1. STOP! Read the safety information on the side of the heater.
2. Make sure equipment shutoff valve is fully open.
3. Turn control knob clockwise to the OFF position.
4. Wait ve (5) minutes to clear out any gas. Then smell for gas, including near the oor. If you smell gas, STOP! Do
not try to light any appliance. Do not touch electrical switch or use any phone in the building. Immediately contact
gas supplier from a neighbor’s phone. Follow gas supplier’s instructions. If you can’t reach the gas supplier, call the
re dept. If you don’t smell gas, go to the next step.
5. Turn control knob counterclockwise to the PILOT position.Press in control knob for ve (5) seconds (see Figure
19).
Note: The rst 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 sysystem. If pilot does not stay lit, refer to
Troubleshooting, pages 23 through 24. Also contact a qualied service technician or gas supplier for repairs. Until
repairs are made, light pilot with match.
• If control knob does not pop up when released, contact a qualied service technician or gas supplier for repairs.
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. The pilot can be seen through the gill. If needed, keep pressing ignitor button until pilot lights.
Note: If pilot does not stay lit, refer to Troubleshooting, pages 23 through 24. Also contact a qualified service
technician or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see “Manual
Lighting Procedure”.
7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob.
If control knob does not pop up when released, contact a qualied service technician or gas supplier for repairs.
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.
8. Turn control knob counterclockwise to desired heating level. The main burner should light. Set control knob to
any heat level between 1 and 5.
CAUTION: Do not try to adjust heating levels by using the equipment shutoff valve.
THERMOSTAT CONTROL OPERATION
The thermostatic control used on this model differs from standard thermostats.
Standard thermostats simply turn the burner on and off. 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 control knob can be set to any comfort level between 1 and 5.
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise to the OFF position.
Shutting Off Burner Only (pilot stays lit )
Turn control knob clockwise to the PILOT position.
Figure 18 - Control Knob in the
OFF Position

2020
LIGHTING INSTRUCTIONS
MD100HBA & MD200HBA & MD300HBA & MD200HBA-BB & MD300HBA-BB
1. STOP! Read the safety 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.
4. Wait ve (5) minutes to clear out any air. Then smell for gas, including near the oor.
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 knob slightly and turn counterclockwise to "PILOT/IGN" and depress for ve (5) seconds
NOTE: The rst 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.
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. Set control knob to desired heating position.
NOTE: Both HIGH and LOW are locked positions. You must press in control knob before turning it from these
positions.
TO TURN OFF 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.
SHUTTING OFF BURNER ONLY
(PILOT STAYS LIT)
Turn control knob clockwise to the PILOT/IGN position.
MANUAL LIGHTING
PROCEDURE
1. Remove lower front panel.
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.
Figure 19 - Control Knob in the
OFF Position