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BLUE FLAME VENT-FREE
NATURAL GAS GARAGE
HEATER
’
OWNER S OPERATION AND INSTALLATION MANUAL
Do not store, or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS
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 call your gas supplier from a
neighbor’s phone. Follow the
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8. Turn heater off ,Before using IMPORTANT Keep the appliance area clear furniture polish, wax, carpet and free from combustible SAFETY INFORMATION cleaner, or similar products. If materials, gasoline, and other IMPORTANT: Read this heated, the vapors from these flammable vapors and liquids. owner’s manual carefully and products may create a white completely before trying to powder residue within burner WARNIN
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PRODUCT FEATURES Figure1-Vent-Free Natural Gas Heater(Model MN300TGA Shown) SAFETY DEVICE LOCAL CODES A standard requirement for all vent-free room 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 ANSZ223.1, The ODS/pilot shuts off the heater if there is also known as
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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 ANS 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 + 20,000
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VENTILATION AIR Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or duels: You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code NFPA 54/ANS Z223.1, Section 5.3. Air for Combustion and Ventilation for required siz
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INSTALLATION FASTENING HEATER TO WALL Attaching to Wall Stud: This method WARNING: Maintain the Mounting Bracket provides the strongest hold. Insert minimum clearances shown The mounting bracket is located mounting screws through mounting in Figure 4. If you can, on back panel of heater (see bracket and into wall studs. provide greater clearances from figure 6). It has been taped there floor, ceiling, and joining wall. Attaching
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INSTALLATION Attaching Mounting Bracket to Wall Note: Wall anchors, mounting screws, and spacers are in hardware package. The hardware Figure 10 - Popping Open Anchor package is provided with heater. Wing for Thin Walls Attaching to Wal l Stud Method Figure 12 - Installing Bottom For attaching mounting bracket to Mounting Screws wall studs 5. Place mounting bracket onto 1. Drill holes at marked locations 2. Mark screw locations on wall. wall.
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INSTALLATION 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" NPT (National Pipe Thread) inlet connection to the pressure regulator. WARNING: Never connect heater to private (non-utility) gas well. This gas is commonly known as well-head gas. IMPORTANT: Check your gas line pressure before connecting heater to gas line.
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INSTALLATION OPERATING YOUR HEATER CHECKING GAS Pressure Testing Heater Gas THERMOSTAT MODEL Connections CONNECTIONS MN300TGA WARNING: Test all gas nFOR YOUR SAFETYn 1. Open equipment shutoff valve piping and connections for leaks after READ BEFORE LIGHTING (see Figure 14). installing or servicing. Correct all 2. Open main gas valve located on WARNING: If you do not leaks at once. or near gas mete
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OPERATING YOUR HEATER This increases or decreases the 7. Keep control knob pressed in THERMOSTAT MODEL burner flame height. At times the room for thirty (30) seconds after MN300TGA may exceed the set temperature. If lighting pilot. After 30 nLIGHTINGn so, the burner will shut off. The burner seconds, release control knob. INSTRUCTIONS will cycle back on when room tem- l If control knob does not pop perature
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OPERATING YOUR HEATER NON-THERMOSTAT MODEL nLIGHTINGn 6. With control knob pressed in, INSTRUCTIONS MN300HGA push down and release the 1. STOP! Read the safety ignitor button. This will light nFOR YOUR SAFETYn information on the side of heater. pilot. If needed, keep pressing READ BEFORE LIGHTING 2. Check that gas supply to ignitor button until pilot lights. heater is on. 7. Keep control kno
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BURNER FLAME PATTERN CLEANING ODS/PILOT AND INSPECTING Figure 22 shows a correct burner BURNER BURNER flame pattern. Figure 23 shows an l Use a vacuum cleaner, Check pilot flame pattern and incorrect burner flame pattern. If pressurized air or a small, soft burner flame pattern often. pilot flame pattern is incorrect, as bristled brush to clean. PILOT FLAME PATTERN shown in Figure 23: CLEANING BURNER PILOT Figure 20 shows a corre
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TROUBLESHOOTING Note : All troubleshooting WARNING: Only a qualified CAUTION: Never use a wire, items are listed in order of service person should service and needle, or similar object to clean operation. repair heater. ODS/pilot. This can damage ODS/pilot unit. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed in, 1. Ignitor electrode is positioned 1. Replace ignitor. there is no spark at ODS/pilot. wrong. 2.
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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 natural gas company. Delayed ignition of burner(s). 1. Manifold pressure is too low. 1. Conta
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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 MN300HGA MN300TGA Btu(available) 15,000/30,000 14,000/30,000 Gas Type Natural Only Natural Only Ignition Piezo Piezo Pressure Regulator Setting 3" W.C. 3"W.C Inlet Gas Pressure (inches of water) Maximum 10.5" 10.5" Minimum 4" 4" Dimensions, Inches (HxWxD) Heater 23 1/2 26 5/8 8 23 1/2 26 5/8 8 × × × × Carton 26 1/2 28 1/2 91/4 26 1/2 28 1/2 91/4 × × × × Weight (pounds) Heater 26 26 Shipping 31 31 Note: Dimensions listed are outer most points on the heater (includes co
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ILLUSTRATED PARTS BREAKDOWN MN300TGA ODS/Pilot Assembly 18
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This list contains replaceable parts for your heater. When ordering replacement PARTS LIST parts, follow the instructions listed under Replacement Parts on page17 of this MN300TGA manual. KEY MN300TGA NO. PART NO. QTY DESCRIPTION Cabinet Assembly 1 MB10052 1 Lower Front Panel Assembly 2 MB09052 1 Reflector Unit 3 MB11052 1 Steel Wind Shield 4 ML089-01 1 Middle Panel 5 ML157-01 1 Grill Guard Assembly 6 MB29001 1 Self Tapping Screw 7 ML069-02 12 Thermostat Valve
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ILLUSTRATED PARTS BREAKDOWN MN300HGA ODS/Pllot Assembly 20
