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IMPORTANT 10. Before using furniture polish, WARNING SAFETY INFORMATION wax, carpet cleaner, or similar Modeles ML150HPA, ML150TPA, IMPORTANT: Read this products, turn heater off. If ML250HPA, ML250TPA are equipped owner’s manual carefully and heated, the vapors from these for propane gas. Field conversion is completely before trying to not permitted. products may create a white assemble, operate, or service this heater. Im
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PRODUCT FEATURES Figure1-Vent-Free Propane/LP Gas Heater SAFETY DEVICE LOCAL CODES A standard requirement for all vent-free room Install and use heater with care. Follow all local heaters. This heater has a pilot with an Oxygen codes. In the absence of local codes, use the Depletion Sensor(ODS) safety shutoff system. latest edition of National Fuel Gas code ANSI Z223.1, The ODS/pilot shuts off the heater if there is also known as NFPA 54*. not eno
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Unusually Tight Construction Confined and FRESH AIR FOR The air that leaks around doors and Unconfined Space COMBUSTION AND windows may provide enough fresh The National Fuel Gas Code ANSI VENTILATION air for combustion and ventilation. Z223.1 defines a confined space However, in buildings of unusually as a space whose volume is less WARNING: This heater tight construction, you must provide than 50 cubic feet per 1,000 Btu per shall not be
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3. Add the Btu/Hr of all fuel burning appliances in the space. Vent-free heater Btu/Hr Gas water heater* Btu/Hr Example: Gas furnace Btu/Hr Gas water heater 40,000 Btu/Hr Vented gas heater Btu/Hr Vent free heater + 18,000
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VENTILATION AIR Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts: You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1, Section 5.3. Air for Combustion and Ventilation for required s
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INSTALLATION FASTENING HEATER TO WALL Attaching to Wall Anchor: This WARNING: Maintain the Mounting Bracket method allows you to attach minimum clearances shown The mounting bracket is located mounting bracket to hollow walls in Figure 4. If you can, on back panel of heater (see (wall areas between studs) or to provide greater clearances from figure 6). It has been taped there solid walls (concrete or masonry). floor, ceiling, and joi
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INSTALLATION Attaching Mounting Bracket to IMPORTANT: Do not Wall hammer key! For thick walls Note: Wall anchors, mounting (over 1/2" thick) or solid walls, screws, and spacers are in do not pop open wings. hardware package. The hardware package is provided with heater. Attaching to Wal l Stud Method Figure 12 - Installing Bottom For attaching mounting bracket to Mounting Screws wall studs 1. Drill holes at marked lo
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INSTALLATION CONNECTING TO GAS SUPPLY WARNING: A qualified service person must connect r heater to gas supply. Follow all local codes. WARNING: This appliance requires a 3/8" NPT (National Pipe Thread) inlet connection to the pressure regulator. 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/
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OPERATING YOUR HEATER INSTALLATION NON-THERMOSTAT MODELS CHECKING GAS Pressure Testing Heater Gas Connections CONNECTIONS nFOR YOUR SAFETYn WARNING: Test all gas READ BEFORE LIGHTING 1. Open equipment shutoff valve piping and connections for leaks (see Figure 15). after installing or servicing. Correct WARNING: If you do not 2. Open propane/LP supply tank all leaks at once. follow these instructions exactly, valve. a fire
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OPERATING YOUR HEATER Slightly press in control knob and turn counterclockwise to the Manual Control Models LOW,MEDIUM, or HIGH position nLIGHTINGn (see Figure 19). INSTRUCTIONS IMPORTANT: Release downward 1. STOP! Read the safety pressure while turning control knob. information on the side of Control knob will lock at the desired heater. position. 2. Check that gas supply to Figure 17 - Control Knob in The nTO TURN OFFn heater is
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OPERATING YOUR HEATER a qualified service person or gas nLIGHTINGn supplier for repairs. THERMOSTAT MODELS INSTRUCTIONS Note: If pilot goes out, repeat 1. STOP! Read the safety nFOR YOUR SAFETYn steps 3 through 7. This heater information on the side of heater. READ BEFORE LIGHTING has a safety interlock system. 2. Make sure equipment shutoff Wait one(1)minute before lighting valve is fully open. WARNING:
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OPERATING HEATER Continued CLEANING ODS/PILOT AND nTHERMOSTATn BURNER CONTROL OPERATION l Use a vacuum cleaner, The thermostatic control used on pressurized air. or small, soft these Models differs from standard bristled brush to clean. Figure 23 - Correct Pilot Flame thermostats.Standard thermostats sim- ply turn on and off the burner. The Pattern CLEANING BURNER thermostat used on this heater PILOT AIR INLET HOLE senses the room temperatu
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TROUBLESHOOTING Note : All troubleshooting WARNING: Only a qualified CAUTION: Never use a wire, items are listed in order of needle, or similar object to clean service person should service and operation. ODS/pilot. This can damage repair heater. ODS/pilot unit. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed and 1. Ignitor electrode is positioned 1. Replace ignitor. control knob is pressed in and turned to wrong.
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TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Burner(s)does not light after 1. Burner orifice is clogged. 1. Clean burner orifice (see Cleaning ODS/pilot is lit. and Maintenance, Page 13) or replace burner orifice. 2. Burner orifice diameter is too small. 2. Replace burner orifice. 3. Inlet gas pressure is too low. 3. Contact local Propane/LP gas company. Delayed ignition of burner(s). 1. Manifold pressure is too low. 1. Con
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TROUBLESHOOTING Continued WARNING: If you smell gas l Shut off gas supply. l Do not try to light any appliance. l Do not touch any electrical switch; do not use any phone in your building. l Immediately cal l your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. l If you cannot reach your gas supplier, call the fire department. IMPORTANT: Operating heater where impurities in air exist may create odors. Clean- i
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SPECIFICATIONS ML150TPA ML250HPA ML250TPA ML150HPA 15,000 6,000/25,000 25,000 6,000/15,000 Btu(available) Propane/LP Only Propane/LP Only Propane/LP Only Propane/LP Only Gas Type Piezo Piezo Piezo Piezo Ignition 10" W.C. 10" W.C. 10" W.C. 10" W.C. Pressure Regulator setting Inlet Gas Pressure (inches of water) 14" 14" 14" 14" Maximum 11" 11" 11" 11" Minimum Dimensions, Inches (HxWxD) 23 1/2 19 1/4 8 23 1/2 26 5/8 8 23 1/2 26 5/8 8 23 1/2×19 1/4×8 × × × × × × Heater 26 1/2 21 3/4 9 1/4 26 1
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ILLUSTRATED PARTS BREAKDOWN ML150HPA Burner Assembly ODS/Pilot Assembly 18
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This list contains replaceable parts for your heater. When ordering relacement PARTS LIST parts, following the instructions listed under Replacement Part on page17 of this ML150HPA manual. KEY ML150HPA NO. QTY PART NO. DESCRIPTION 1 1 MB11054 Cabinet Assembly 2 MB09052 1 Lower Front Panel Assembly 3 MB11053 1 Deflector Unit 4 MB19004 1 Burner Assembly 5 ND1808x400x9 1 ODS Pilot Assembly 5-1 ND0803-4 1 Thermocouple 5-2 ND0807 1 lgnitor Electrode 6 ML026-01 1 ODS
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ILLUSTRATED PARTS BREAKDOWN ML250HPA ODS/Pilot Assembly Burner Assembly 20
