Procom ML300TGA, ML300HGA User Manual

Download

Page 1

BLUE FLAME VENT-FREE

PROPANE/LP GAS GARAGE

HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

Do not store, or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT T O 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

ML300HGA ML300TGA

NON-THERMOST AT AND THERMOSTAT MODEL

Table of Contents

Important Safety Information..................................... 2

Fresh Air for Combustion and Ventilation ............... 4

Installation..................................................................... 8

Operating Y our Heater ............................................... 1 1

Cleaning&Maintenance.............................................13

Trouble Shooting.........................................................14

Specifications..............................................................17

Illustrate Parts Breakdown ML300TGA .................18

Parts List ML300TGA .................................................19

Illustrate Parts Breakdown ML300HGA .................20

Parts List ML300HGA .................................................21

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. Provisions for adequate combustion and ventilation air must be provided. Refer to Air For Combustion and Ventilation section on page 4 of this manual.

5 Musick Irvine CA 92618

PRO-COM PHONE NUMBER: (877)886-5989

4600 Highlands parkway S.E SUITE # D/E Smyrna, GA 30080

the fire department. Installation and service must be performed by a qualified installer, service agency or gas supplier.

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer, service agency, or gas supplier.

This appliance may be installed in an aftermarket* permanently 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.

WA TER VAPOR: A BY -PRODUCT OF UNVENTED ROOM HEATERS Water vaporis a by-product of gas combustion.An unvented room heater produces approximately one (1) ounce (30ml) of water for every 1,000 BTU’s (.3KW’s) of gas input per hour. Refer to page 3.

Installer: Please leave these instructions with the consumer.

Consumer: Please retain these instructions for future use.

*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer.

Page 2

IMPORTANT SAFETY INFORMATION

WARNINGS

IMPORTANT: Read this

owner’s manual carefully and completely before trying to assemble, operate, or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.

WARNING: Do not use any

accessory not approved for use with this heater.

WARNING: Any change to

this heater or its controls can be dangerous.

Do not place clothing or other flammable material on or near the appliance. Never place any objects on the heater.

Due to high temperatures, heater should be kept out of traffic and away from furniture and draperies.

Surface of heater becomes very hot when running heater. Keep children and adults away from hot surface to avoid burns or clothing ignition. Heater will remain hot for a time after shut down. Allow surface to cool before touching.

Carefully supervise young children when they are in the same room with heater.

Make sure grill guard is in place before running the heater.

Keep the appliance area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

State of Massachusetts: The

installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts.

Sellers of unvented propane or natural gas-fired 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 nature gas-fired space heaters shall be prohibited in bedrooms and bathrooms.

1. 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.

2. Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outside.

3. If you smell gas

 Shut off gas supply.  Do not try to light any appliance.  Do not touch any electrical switch;

do not use any phone in your building.

 Immediately call 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.

4. This heater shall not be installed in a bathroom or bedroom.

5. This heater needs fresh, outside air ventilation to run properly. This heater has an Oxygen Depletion Sensor (ODS) safety shutoff system. The ODS shuts down the heater if not enough fresh air is available. See Fresh Air for

Combustion and Ventilation

pages 4 and 5.

6. Keep all air openings in front and bottom of heater clear and free of debris. This will insure enough air for proper combustion

7. If heater shuts off. Do not relight until you provide fresh, outside air. If heater keeps shutting off, have it serviced.

8. Do not run heater  where flammable liquids or vapors

are used or stored

 under dusty conditions

9. Turn heater off before using furniture polish, wax, carpet cleaner, or similar products. If heated, the vapors from these products may create a white powder residue within burner box or on adjacent walls or furniture.

10. Do not use heater if any part has been under water.Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water.

11. Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater.

12. Operating heater above elevations of 4,500 feet could cause pilot outage.

13. To prevent performanc problems, do not use propane/LP fuel tank of less than 100 lbs. capacity.

DANGER: Carbon monoxide

poisoning may lead to death!

Carbon Monoxide Poisoning.

Early signs of carbon monoxide poisoning resemble the flu with headaches, dizziness, or nausea If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, persons with heart or lung disease or anemia, those under the influence of alcohol, and those at high altitudes. Propane/LP GAS: Propane/LP gas is odorless. An odor-making agent is added to propane/LP gas. The odor helps you detect a propane/LP gas leak . However, the odor added to propane/LP gas can fade. Propane/LP gas may be present even though no odor exists. Make certain you read and understand all warnings. Keep this manual for reference. It is your guide t o safe and proper operation of this heater.

Page 3

PRODUCT FEATURES

Figure1-Vent-Free Propane/LP Gas Heater(Model ML300TGA Shown)

SAFETY DEVICE

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.

PIEZO IGNITION SYSTEM

This heater is equipped with a piezo ignitor. This system requires no matches, batteries, or other sources to light heater.

THERMOSTATIC HEAT CONTROL ON THERMOSTAT

MODEL ML300TGA

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 produces approximately one (1) ounce (30ml) of wter for every 1,000 BTU’s (.3KW’s) of gas input per hour. Unvented room heaters are remommended 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.

LOCAL CODES

Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of National Fuel Gas Code ANSZ223.1, also known as NFPA 54*. *Available from : American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park Quincy, MA 02269

UNPACKING

1. Remove heater from carton.

2. Remove all protective packaging applied to heater for shipment.

3. Check heater for any shipping damage. If heater is damaged. promptly inform dealer where you bought heater.

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.

Page 4

FRESH AIR FOR COMBUSTION AND

VENTILATION

WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning

appliances in your home.

PRODUCING ADEQUATE VENTILATION

The following are excerpts from National Fuel Gas Code. NFPA

54/ANS Z223.1, Section 5.3. Air for Combustion and Ventilation. All spaces in homes fall into one of the three following ventilation classifications:

1. Unusually Tight Construction

2. Unconfined Space

3. Confined Space The information on pages 4 through 6 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Unusually tight construction is defined as construction where:

a. walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of one perm (6 per pa-sec-m openings gasketed or sealed b. weather stripping has been added on openable windows and doors

and

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.

If your home does not meet all of the three criteria above, see

Determining Fresh-Air Flow for Heater Location, page 5.

) or less with

-11

and

Confined and Unconfined Space

The National Fuel Gas Code ANS Z223.1 defines a confined

space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space. This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.

Adjoining rooms are

communicating only if there are doorless passageways or ventilation grills between them.

per kw) of the

per kw)

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 Length Example: Space size 20ft. (length) If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.

(volume of space)÷50 cu. ft.=(Maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space)÷50 cu.ft.=51.2 or 51.200(maximum Btu/Hr the space can support)

WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.

Width×Height= cu.ft. (volume of space)

16ft( width)×8ft. (ceiling height)=2560cu. ft. (volume of space)

width×height).

Page 5

3. Add the Btu/Hr of all fuel burning appliances in the space. Vent-free heater Gas water healer* Gas furnace Vented gas heater Gas Fireplace logs Other gas appliances* + Total =

*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.

Btu/Hr (maximum the space can support) Btu/Hr (actual amount of Btu/Hr used)

Example : 51,200 Btu/Hr(maximum the space can support)

60,000 Btu/Hr(actual amount of Btu/Hr used) The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows: A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 5. B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6 . C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.

Btu/Hr

Btu/Hr Btu/Hr Btu/Hr

Btu/Hr

Example: Gas water heater 40,000 Btu/Hr Vent free heater Total = 60,000 Btu/Hr

+ 20,000 Btu/Hr

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 and one within 12 wall connecting the two spaces (see options 1 and 2, Figure 2). You can also remove door into adjoining room (see option 3, Figure 2). Follow the National

Fuel Gas Code NFPA 54/ANS Z223.1. Section 5.3, Air for Combustion and Ventilation for required size of

ventilation grills or ducts

WARNING: Rework worksheet, adding the space of the adjoining unconfined space. The combined spaces must have enough fresh air to supply all appliances in both spaces.

" of the ceiling

" of the floor on the

Figure 2 -Ventilation Air from Inside Building

Page 6

Figure 3 -Ventilation Air from Outdoors

INSTALLATION

VENTILATION AIR

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or duels: You must provide two permanent openings: one within 12 12 Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas

Code NFPA 54/ANS Z223.1, Section 5.3. Air for Combustion and Ventilation for

required size of ventilation grills or ducts. IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power vent.

" of the ceiling and one within

" of the floor.

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.

WARNING: A qualified service person must install heater. Follow all local codes.

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.

INSTALLATION NEEDS

Before installing heater, make sure

you have the items listed below.

 piping (check local codes)  sealant (resistant to propane/LP gas)  equipment shutoff valve*  ground joint union  test gauge connection*  sediment trap  tee joint  pipe wrench

*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.

LOCATING HEA TER

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



where there is easy access for

operation, inspection, and service

 in coldest part of room An optional fan kit is available from your dealer. See Accessories, page 17. If planning to use fan, locate heater near an electrical outlet.

CAUTION: If you install the heater in a home garage  heater pilot and burner must be at least 18 inches above floor.  locate heater where moving vehicle will not hit it.

CAUTION: This heater creates warm air currents. These currents move heat to wall surfaces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as tobacco smoke, aromatic candles, cleaning fluids, oil or kerosene lamps, etc.) in the air exist may discolor walls.

WARNING: Never install

the heater

 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.

Page 7

INSTALLATION

WARNING: Maintain the

minimum clearances shown in Figure 4. If you can, provide greater clearances from floor, ceiling, and joining wall.

Figur 4 -Mounting Clearances As Viewed From Front Of Heater

IMPORTANT: Vent-free heaters add moisture to the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See

Fresh Air for Combustion and Ventilation, page s 4 and 5.

FASTENING HEATER TO WALL

Mounting Bracket

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.

Figure 6 -Mounting Bracket Location

Removing Lower Front Panel Of Heater

1. Remove two screws near bottom corners of lower front panel

2. Pull bottom of lower front panel forward, then down (see Figure 7).

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.

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 8. If you can, provide greater clearances from floor and joining wall.

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.

3. Remove tape and mounting bracket from wall.

INSTALLING THERMOSTAT SENSING BULB For ML300TGA

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 5 - Moving Thermostat Sensing Bulb

Figure 7 - Removing Lower Front Panel Of Heater

Methods For Attaching Mounting Bracket To Wall

Only use last hole on each end of mounting bracket to attach bracket to wall. These two holes are 16 inches apart from their centers.Attach mounting bracket to wall only in one of two ways:

1. Attaching to wall stud

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 ML300TGA, ML300HGA

Figure 8 - Mounting Bracket Clearances

Page 8

INSTALLATION

Attaching Mounting Bracket T o Wall Note: Wall anchors, mounting

screws, and spacers are in hardware package. The hardware package is provided with heater.

Attaching T o W all Stud Method

For attaching mounting bracket to wall studs

1. Drill holes at marked locations using 9/64

2. Place mounting bracket onto wall. Line up last hole on each end of bracket with holes drilled in wall.

3. Insert mounting screws through bracket and into wall studs.

4. Tighten screws until mounting bracket is firmly fastened to wall studs.

Attaching To W all 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 walls (concrete or masonry), drill at least 1

2. Fold wall anchor as shown in Figure 9 below.

Figure 9 - Folding Anchor

" drill bit.

" drill bit. For solid

" deep.

IMPORTANT: Do not hammer key! For thick walls (over 1/2 do not pop open wings.

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.

Placing Heater On Mounting Bracket

1. Locate two horizontal slots on back panel of heater (see Figure 11).

2. Place heater onto mounting bracket. Slide horizontal slots onto stand-out tabs on mounting bracket.

" thick) or solid walls,

Figure 12 - Installing Bottom Mounting Screws

2. Mark screw locations on wall.

3. Remove heater from mounting bracket.

4. If installing bottom mounting screws into hollow or solid wall, install wall anchors. Follow steps 1 through 4 under Attaching To Wall Anchor Method. If installing bottom mounting screw into wall stud, drill holes at marked locations using 9/64 drill bit.

5. Replace heater onto mounting bracket.

6. Place spacers between bottom mounting holes and wall anchor or drilled hole.

7. Hold spacer in place with one hand. With other hand, insert mounting screw through bottom mounting hole and spacer. Place tip of screw in opening of wall anchor or drilled hole.

8. Tighten both screws until heater is firmly secured to wall. Do not over tighten.  Note: Do not replace front panel at this time. Replace front panel after making gas connections and checking for leaks (see pages 9,10).

3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall.

4. For thin walls (1/2 insert red key into wall anchor. Push red key to

"pop" open anchor wings

(see Figure 10).

" or less),

Figure 1 1 - Mounting Heater Onto Mounting Bracket

Installing Bottom Mounting Screws

1. Locate two bottom mounting holes. These holes are near bottom on back panel of heater(see Figure 12).

Page 9

CONNECTING TO GAS SUPPLY

WARNING: A qualified

service person must connect heater to gas supply. Follow all local codes.

WARNING: This appliance requires a 3/8 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 13 - External Regulator with Vent Pointing Down

" NPT (National Pipe

INSTALLATION

Figure 14 -Gas Connection

*A CSA/AGA design-certified equipment shutoff valve with 1/8 an acceptable alternative to test gauge connection. Purchase the optional CSA/AGA design-certified equipment shutoff valve from your dealer. See Accessories, page 17.

CAUTION: Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of large enough diameter to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

T ypical Inlet Pipe Diameters

ML300HGA / ML300TGA 1/2" or greater

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). IMPORTANT: Install an equipment

shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.

Apply pipe joint sealant lightly to male threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.

CAUTION: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

Install sediment trap in supply line as shown in Figure 14. Locate sediment trap where it is within reach for cleaning. Locate 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. IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings.

" NPT tap is

Page 10

INST ALLATION

OPERA TING YOUR HEATER

CHECKING GAS CONNECTIONS

WARNING: Test all gas piping

and connections for leaks after installing or servicing. Correct all leaks at once.

WARNING: Never use an open

flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

Pressure Testing Gas Supply Piping System Test Pressures In Excess Of 1/2 PSIG (3.5 K Pa)

1. Disconnect appliance 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

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.

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 gas meter

to equipment shutoff valve (see Figure 16). Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

4. Correct all leaks at once.

Pressure Testing Heater Gas Connections

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.

5. Correct all leaks at once.

6. Light heater (see Operating Heater, pages 10 and 11 for thermostat model or page 12 for non-thermostat model). Check the rest of the internal joints for leaks.

7. Turn of f heater (see To Turn Off Gas To Appliance, page 11 for thermostat model or page

12 for non-thermostat model).

8. Replace lower front panel.

Figure 15 -Equipment Shutoff Valve

Figure 16 -Checking Gas Joints

THERMOSTAT MODEL

ML300TGA

FOR YOUR SAFETY

READ BEFORE LIGHTING

WARNING: If you do not

follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly. B. BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor .

WHAT TO DO IF YOU SMELL GAS

 Do not try to light any appliance.  Do not touch any 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 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. 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.

Page 11

OPERATING YOUR HEATER

LIGHTING

INSTRUCTIONS

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.

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 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

"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.

6. With control knob pressed in, push down and release the ignitor button. This will light pilot. If needed, keep pressing ignitor button until pilot lights.

NOTE: If pilot does not stay lit,refer to Troubleshooting, pages 14 through

16. Also contact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure.

"B" in the safety

7. Keep control knob pressed in

for thirty (30) seconds after lighting pilot. After 30 seconds, release control knob.  If control knob does not pop up when released, contact a qualified service person or gas supplier for repairs.

NOTE: If pilot goes out, repeat steps 3 through 7. Wait one (1) minute before lighting pilot again

8. Turn control knob

counterclockwise desired heating Level. The main burner should light. Set control knob to any heat level between HI and LO.

Figure 17 - Control Knob in The OFF Position

Figure 18 - Pilot

THERMOSTAT

CONTROL

OPERATION

The thermostatic control used on these models differs from standard thermostats. Standard thermostats simply turn on and off the burner.The thermostat used on this heater senses the room temperature. The thermostat adjusts the amount of gas flow to the burner.

This increases or decreases the burner flame height. At times the room may exceed the set temperature. If so the burner will shut off. The burner will cycle back on when room temperature drops below the se temperature. The control knob can be set to any heat level between HI and LO. Selecting the HI setting will cause the burner to remain fully on withou modulating down in most cases.

NOTE: the thermostat sensing bulb measures the temperature of air near the heater cabinet. This may not always agree with room temperature (depending on housing construction installation location, room size, open air temperatures, etc.). frequent use o your heater will let you determine your own comfort levels

 TO TURN OFF 

GAS TO APPLIANCE

Shutting Off Heater

1. Turn control knob clockwise

2. Turn off all electric power to the appliance if service is to be performed.

to the OFF position.

SHUTTING OFF BURNER ONLY (PILOT ST AYS LIT)

Turn control knob clockwise to the PILOT/IGN position.

MANUAL LIGHTING

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.

Page 12

OPERATING YOUR HEATER

NON-THERMOST AT MODEL

ML300HGA

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.

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 fire department.

LIGHTING

INSTRUCTIONS

1. STOP! Read the safety information on the side of heater.

2. Check that gas supply to

heater is on.

3. Push in control knob slightly and turn clockwise

OFF position.(see Figure 19) NOTE: Knob cannot be turned

from

"PILOT " to "OFF" unless

knob is pushed in slightly. Do

not force.

4. Wait five minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas.STOP! Follow safety information on the side of heater. If you don’t smell gas. go

to the next step.

5. Push in and turn control knob counterclockwise position. Press in control knob

for five(5) seconds. Note: You may be running

this heater for the first time after hooking up to gas supply. If so, you may need to press in control knob for 30 seconds. This will allow air to bleed from

the gas system.

to the

"B" in the

to PILOT

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 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.

. Release

TO TURN OFF

GAS TO APPLIANCE

Shutting Off Heater

1. Turn control knob clockwise to the OFF position.

2. T urn off all electric power to the appliance if service is to

be performed.

Shutting Off Burner Only (pilot stays lit )

Slightly press in control turn control knob clockwise PILOT position.

to the

C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, don’t try to repair it , call a qualified service technician or gas supplier. Force or attempted repair may result in a fire or explosion. D. Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

Figure 19 - Control Knob In The OFF Position

Figure 20 - Pilot

MANUAL LIGHTING

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.

Page 13

INSPECTING BURNER

Check pilot flame pattern and burner flame pattern often.

PILOT FLAME PATTERN

Figure 21 shows a correct pilot flame pattern. Figure 22 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down. If pilot flame pattern is incorrect, as shown in Figure 22.  turn heater off (see To Turn

Off Gas To Appliance on page

12 for non-thermostat model or page 11 for thermostat model)  see Troubleshooting on pages 14 through 16

Figure 21 - Correct Pilot Flame Pattern

Figure 22 - Incorrect Pilot Flame Pattern

WARNING: If yellow tipping occurs, your heater could produce increased levels of carbon monoxide. If burner flame pattern shows yellow tipping, follow instructions at bottom of this page.

Notice: Do not mistake orange flames with yellow tipping. Dirt or other fine particles enter the heater and burn causing brief patches of orange flame.

Figure 23 - Correct Burner Flame Pattern

Figure 24 - Incorrect Burner Flame Pattern

CLEANING AND MAINTENANCE

WARNING: Turn off heater

and let cool before servicing.

CLEANING ODS/PILOT AND BURNER

 Use a vacuum cleaner,

pressurized air or small, soft

bristled brush to clean.

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 compressed air no greater than 30 PSl. Y our local computer store, hardware store, or home center may carry compressed air in a can. You can use a vacuum cleaner in the blow position. If using compressed air in a can, please follow the directions on the can. If you don’t follow directions on the can, you could damage the pilot assembly.

1. Shut off the unit, including the pilot. Allow the unit to cool for

at least thirty minutes.

2. Inspect burner, pilot for dust

and dirt.

3. Blow air through the ports/slots

and holes in the burner. 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 25). With the unit off, lightly blow air through the air inlet hole. You may blow through a drinking straw if compressed air is not available.

BURNER FLAME PATTERN

Figure 23 shows a correct burner flame pattern. Figure 24 shows an incorrect burner flame pattern. If pilot flame pattern is incorrect, as shown in Figure 24.  turn heater off (see To T urn Off

Gas To Appliance on page 12 for

non-thermostat model or page 1 1 for thermostat model)  see Troubleshooting on pages 14 through 16

CAUTION: Y ou must keep control areas, burner, and circulating air passageways of heater clean. Inspect these areas of heater before each use. Have heater Inspected yearly by a qualified service person. Heater may need more frequent cleaning due to excessive lint from carpeting, bedding material, pet hair, etc.

Figure 25 - Pilot Inlet Air Hole

CLEANING HEATER CABINET

Air Passageways

 Use a vacuum cleaner or pressurized air to clean.

Exterior

 Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust.

Page 14

TROUBLESHOOTING

Note : All troubleshooting items are listed in order of operation.

OBSERVED PROBLEM

When ignitor button is pressed in, there is no spark at ODS/pilot.

When ignitor button is pressed in, there is a spark at ODS/pilot but no ignition.

WARNING: Only a qualified service person should service and repair heater.

POSSIBLE CAUSE

1. Ignitor electrode is positioned wrong.

2. Ignitor electrode is broken.

3. Ignitor electrode is not connected to ignitor cable.

4. Ignitor cable pinched or wet.

5. Broken ignitor cable.

6. Bad piezo ignitor.

1. Gas supply turned off or equipment shutoff valve is closed.

2. Control knob not fully pressed in while pressing ignitor button.

3. Air in gas lines when installed.

4. ODS/pilot is clogged.

5. Gas regulator setting is not correct.

6. Control knob not in PILOT position.

7. Depleted gas supply.

CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/pilot unit.

REMEDY

1. Replace ignitor.

2. Replace ignitor.

3. Reconnect ignitor cable.

4. Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry.

5. Replace ignitor cable.

6. Replace piezo ignitor.

1. Turn on gas supply of open equipment shutoff valve.

2. Fully press in control knob while pressing ignitor button.

3. Continue holding down contro knob. Repeat igniting operation

until air is removed.

4. Clean ODS/pilot (see Cleaning

and Maintenance. Page 13) or

replace ODS/pilot assembly.

5. Replace gas regulator.

6. Turn control knob to pilot position.

7. Contact local propane/LP gas campany.

ODS/pilot lights but flame goes out when control knob is released.

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.

4. Thermocouple connection loose at control valve. 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: A) Low gas pressure B) Dirty or partially clogged ODS/pilot

6. Thermocouple damaged.

7. Control valve damaged.

1. Press in control knob fully.

2. After ODS/pilot lights, keep contro

knob pressed in 30 seconds.

3. Fully open equipment shutoff valve.

4. Hand tighten until snug, then

tighten 1/4 turn more.

5. A) Contact local propane/LP gas

company. B) Clean ODS/pilot (see Cleaning and Maintenance. Page 13) or replace ODS/pilot assembly.

6. Replace thermocouple.

7. Replace control valve.

Page 15

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

Burner(s)does not light after ODS/pilot is lit.

Delayed ignition of burner(s).

Burner backfiring during combustion.

Yellow flame during burner combustion.

POSSIBLE CAUSE

1. Burner orifice is clogged.

2. Burner orifice diameter is too small

3. Inlet gas pressure is too low.

1. Manifold pressure is too low.

2. Burner orifice is clogged.

1. Burner orifice is clogged or damaged.

2. Burner damaged.

3. Gas regulator defective.

1. Not enough air.

2. Gas regulator defective.

3. Inlet gas pressure is too low.

REMEDY

1. Clean burner orifice (see Cleaning and Maintenance, page 13) or replace burner orifice.

2. Replace burner orifice.

3. Contact local Propane/LP gas company.

1. Contact local Propane/LP gas company.

2. Clean burner (see Cleaning and Maintenance, page 13) or replace burner orifice.

1. Clean burner orifice (see Cleaning and Maintenance, page 13) or replace.

2. Replace burner.

3. Replace gas regulator.

1. Check burner for dirt and debris. If found, clean burner (see Cleaning and Maintenance, Page 13).

2. Replace gas regulator.

3. Contact local propane/LP gas company.

Slight smoke or odor during initial operation.

Heater produces a whistling noise when burner is lit.

Heater produces a clicking/ticking noise just after burner is lit or shut off.

White powder residue forming within burner box or on adjacent walls or furniture.

1. Residues from manufacturing processes.

1. Turning control knob to HI position when burner is cold.

2. Air in gas line.

3. Air passageways on heater blocked.

4. Dirty or partially clogged burner orifice.

1. Metal expanding while heating or contracting while cooling.

1. When heated, vapors from furniture polish, wax, carpet cleaners, etc. turn into white powder residue.

1. Problem will stop after a few hours of operation.

1. Turn control knob to LO position and let warm up for a minute.

2. Operate burner until air is removed from line. Have gas line checked by local Propane/LP gas company.

3. Observe minimum installation clearances (Figure 4, p7).

4. Clean burner (see Cleaning and maintenance, Page13) or replace burner orifice.

1. This is common with most heaters. If noise is excessive, contact qualified service person.

1. Turn heater off when using furniture polish, wax, carpet cleaner or similar products.

Page 16

TROUBLESHOOTING

Continued

WARNING: If you smell gas



Shut off gas supply.

 Do not try to light any appliance.  Do not touch any electrical switch; do not use any phone in your building.  Immediately call 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.

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.

OBSERVED PROBLEM

Heater produces unwanted odors.

Heater shuts off in use (ODS operates).

Gas odor even when control knob is in OFF position.

Gas odor during combustion.

POSSIBLE CAUSE

1. Heater burning vapors from paint, hair spray, glues, etc. (See IMPORTANT statement above).

2. Gas leak. See Warning Statement at top of page.

3. Low fuel supply.

1. Not enough fresh air is available.

2. Low line pressure.

3. ODS/pilot is partially clogged.

1. Gas leak. See Warning Statement at top of page.

2. Control valve is defective.

1. Foreign matter between control valve and burner.

2. Gas leak. See Warning Statement at top of page.

REMEDY

1. Ventilate room. Stop using odor causing products while heater is running.

2. Locate and correct all leaks(see Checking Gas Connections, page 10).

3. Refill supply tank.

1. Open window and/or door for ventilation.

2. Contact local Propane/LP gas company.

3. Clean ODS/pilot (see Cleaning Page 13).

1. Locate and correct all leaks(see Checking Gas Connections, Page 10).

2. Replace control valve.

1. Take apart gas tubing and remove foreign matter.

2. Locate and correct all leaks (see Checking Gas Connections, Page 10).

Heater produces a clicking/ticking noise just after burner is lit or shut off.

Moisture/condensation noticed on windows.

1. Metal is expanding while heating or contracting while cooling.

1. Not enough combustion/ventilation air.

1. This is common with most heaters. if noise is excessive, contact qualified service person.

1. Refer to Air for Combustion and Ventilation requirements, Page

Page 17

SPECIFICATIONS

ML300HGA

Btu(available) Gas Type Ignition Pressure Regulator Setting Inlet Gas Pressure* (inches of water) Maximum Minimum Dimensions, Inches (HxWxD) Heater Carton Weight (pounds) Heater Shipping

Note: Dimensions listed are outer most points on the heater (includes control knobs and grill). * For purposes of input adjustment.

REPLACEMENT P ARTS

Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty.

PARTS UNDER WARRANTY Contact authorized dealer from whom you purchased this product. If they are unable to supply original replacement part(s), call the number on this back of the manual. When contacting your dealer or PRO-COM, have ready:

 your name  your address  model and serial numbers of

your heater

 how heater was malfunctioning  type of gas used (propane/LP or

natural gas)

 purchase date  Warranty Card

Usually, we will ask you to return the defective part to the factory.

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact PRO-COM. The information on the back of this manual.

ACCESSORIES

Purchase these heater accessories from your local dealer. If they can not supply these accessories, contact PRO-COM for information. Y ou can also write to the address listed on the back page of this manual.

15,000/28,000

Propane/LP Only

Piezo

" W.C.

14" 11"

23 1/2×26 5/8×8 26 1/2

28 1/2×91/4

26 31

For all models, provides better heat distribution. Makes heater or efficient. Complete installation and operating instructions included.

Thermostatically-controlled PF06YJLF-B, includes three settings ON/OFF/AUTO

ML300TGA

14,000/28,000

Propane/LP Only

Piezo

"W.C

14" 11"

23 1/2×26 5/8×8 26 1/2

28 1/2×91/4

26 31

FAN PF06-YJLF-B

PARTS NOT UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply original replacement part(s),contact PRO-COM.

EQUIPMENT SHUTOFF VALVE

For all models. Equipment shutoff valve with 1/8 is not currently available from PRO-COM.

" NPT tap. This part

Page 18

ILLUSTRATED PARTS BREAKDOWN

ML300TGA

Page 19

PARTS LIST ML300TGA

This list contains replaceable parts used in your heater. When ordering replacement parts, follow the instructions listed under Replacement Parts 17 on page of this manual.

KEY NO.

10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 24_1 24_2

ML300TGA PA RT NO. MB10002

MB09001

MB11002

ML089-01

ML084-01

MB29001

ML069-02

SIT545-175

845-4.8x60Z

ML1 11-01 ML083-03 ML073-01 NRV81FI-8 96-4Z ML079-01 MB40006 MB40022 MB40023 NBB30-000B1 ML101-01 ML091-07 ML103-01 ML104-01 ND2008x800x9 ND0803-8 ND0807-B2 ML105-01 6170-5Z ML060-01

MB28001 ML070-28 ML071-02 ML072-01 ML065-01

DESCRIPTION Cabinet Assembly

Lower Front Panel Assembly Reflector Unit Steel Wind Shield Middle Panel Grill Guard Self Tapping Screw Thermostat Valve Assembly Screws Thermostat Valve Base/Bracket Ignitor Assembly Ignitor Line Pressure Regulator Washer Self Locking Screw Main Inlet Tube Assembly ODS Line Assembly Burner Inlet Tube Assembly Burner Burner Connector Injector Left Burner Support Bracket Right Burner Support Bracket ODS/pilot Assembly Thermocouple Ignitor Electrode ODS Upper Deflector NUT Mounting Bracket

PARTS AVAILABLE NOT SHOWN

Assembly Hardware CSA Label Gas Instruction Decal Inside Warning Label Thermostat Sensing Bulb Clip

QTY

1 1 1 1 1 1

1 2 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 2 1

1 1 1 1 2

Page 20

ILLUSTRATED PARTS BREAKDOWN

ML300HGA

Page 21

PARTS LIST ML300HGA

This list contains replaceable parts used in your heater. When ordering replacement parts, follow the instructions listed under Replacement Parts on page 17 of this manual.

KEY NO.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

28-1 28-2

29 30 31

ML300HGA PA RT NO. MB10003 MB09001

MB11002 ML089-01 MB29001 ML084-01 ML083-03 ML069-02 NV2020-14 ML073-01 MB16002 ML029-01 NRV81FI-8 96-4Z ML079-01 MB40016 MB40018 MB40019 MB40020 MB40021 ML096-01 MB40017 NBB30-000B1 ML101-01 ML091-01 ML103-01 ML104-01 ND2008x800x9 ND0803-8 ND0807-B2 ML105-01 6170-5Z ML060-01

MB28001 ML070-26 ML071-02 ML072-01 ML065-01

DESCRIPTION Cabinet Assembly

Lower Front Panel Assembly Reflector Unit Steel Wind Shield Grill Guard Middle Panel lgnitor Assembly Self Tapping Screw Control Valve Ignitor Line Control Knob Assembly Control V alve Fixed Nut Pressure Regulator Washer Self Locking Screw Main Inlet Tube Assembly ODS Line Assembly Lower Gas Outline Tube Assembly Medium Gas Outline Tube Assembly High Gas Outline Tube Assembly 4-Way Connector Burner Inlet Tube Assembly Burner Burner Connector Injector Left Burner Support Bracket Right Burner Support Bracket ODS/Pilot Assembly Thermocouple Ignitor Electrode ODS Upper Deflector NUT Mounting Bracket

PARTS AVAILABLE.NOT SHOWN

Assembly Hardware CSA Label Gas Instruction Decal Inside Warning Label Thermostat Sensing Bulb Clip

QTY

1 1 1 1 1 1 1

1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1

1 1 1 1 2