Summary of the content on the page No. 1
UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
18,000 BTU THERMOSTAT MODELS
LSL18NT, LSL18PT, SL18NT, SL18PT, VSL18NT AND VSL18PT
WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
— 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
• Do not try to light an
Summary of the content on the page No. 2
WARNING: Improper installation, adjustment, altera- tion, service or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer, service agency or the gas supplier. WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provi- sions for adequate combustion and ventilation air must be provided. Refer to Ai
Summary of the content on the page No. 3
SAFETY INFORMATION Do not place clothing or other flammable material on or near IMPORTANT: Read this owner’s the appliance. Never place any manual carefully and completely objects on the heater. before trying to assemble, operate or service this heater. Surface of heater becomes very Improper use of this heater can hot when running heater. Keep cause serious injury or death children and adults away from from burns, fire, explosion, hot surface to avoid burns or electrical shock and
Summary of the content on the page No. 4
SAFETY INFORMATION PRODUCT Continued IDENTIFICATION 6. Keep all air openings in front and bottom of Heater Cabinet heater clear and free of debris. This will insure enough air for proper combustion. Control Knob 7. If heater shuts off, do not relight until you (under door) 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. Before using furniture polish, wax, carp
Summary of the content on the page No. 5
Unusually tight construction is defined as AIR FOR COMBUSTION construction where: AND VENTILATION a. walls and ceilings exposed to the out- side atmosphere have a continuous WARNING: This heater shall water vapor retarder with a rating of not be installed in a confined -11 2 one perm (6x10 kg per pa-sec-m ) or space or unusually tight con- less with openings gasketed or sealed struction unless provisions are and b. weather stripping has been added on provided for adequate combus- openabl
Summary of the content on the page No. 6
4. Compare the maximum Btu/Hr the space can AIR FOR COMBUSTION support with the actual amount of Btu/Hr used. AND VENTILATION _________Btu/Hr (maximum the space can support) Continued _________Btu/Hr (actual amount of Btu/Hr used) Example: 51,200 Btu/Hr (maximum the space DETERMINING FRESH-AIR FLOW can support) FOR HEATER LOCATION 58,000 Btu/Hr (actual amount of Determining if You Have a Confined or Btu/Hr used) Unconfined Space The space in the above example is a confined space Us
Summary of the content on the page No. 7
AIR FOR COMBUSTION Ventilated Outlet AND VENTILATION Attic Air Continued Outlet Air To Attic VENTILATION AIR Ventilation Air From Inside Building To This fresh air would come from an adjoining un- Crawl Space confined space. When ventilating to an adjoining Inlet Air unconfined space, you must provide two perma- Ventilated Inlet Air nent openings: one within 12" (30.4 cm) of the Crawl Space ceiling and one within 12" (30.4 cm) of the floor Figure 3 - Ventilation Air from Outdoors on the wa
Summary of the content on the page No. 8
INSTALLATION CAUTION: This heater cre- Continued ates warm air currents. These INSTALLATION ITEMS currents move heat to wall sur- Before installing heater, make sure you have the faces next to heater. Installing items listed below. heater next to vinyl or cloth wall • for propane/LP gas, external regulator (supplied coverings or operating heater by installer) where impurities (such as, but • piping (check local codes) not limited to, tobacco smoke, • sealant (resistant to propane/LP gas
Summary of the content on the page No. 9
4. Turn front panel face down. Gently press onto INSTALLATION a hard surface to snap bushing into hole. Turn Continued panel back over, face up. INSTALLING HEATER TO WALL 5. Place spacers over 4 holes on front panel as shown in Figure 7. Mounting Bracket 6. Position glass on top of spacers, aligning holes. Locate mounting bracket in heater carton. Remove mounting bracket from heater carton. Note: If glass gets scratched or marred from normal use, it may be reversed on heater. 7. Place 4 re
Summary of the content on the page No. 10
Insert wall first) hole. 3. anchor (wings into Tap INSTALLATION anchor flush to wall. Continued 4. For thin walls [1/2" (1.3 cm) or less], insert red key into wall anchor. Push red key to “pop” open WARNING: Maintain mini- anchor wings. IMPORTANT: Do not hammer mum clearances shown in Figure key! For thick walls [over 1/2" (1.3 cm) thick] 8. If you can, provide greater or solid walls, do not pop open wings. clearances from floor and join- 5. Place mounting bracket onto wall. Line up ing w
Summary of the content on the page No. 11
CONNECTING TO GAS SUPPLY INSTALLATION Continued WARNING: This appliance Installing Bottom Mounting Screws requires a 3/8" NPT (National 1. Locate two bottom mounting holes. These Pipe Thread) inlet connection to holes are near bottom on back panel of heater the pressure regulator. (see Figure 12). 2. Mark screw locations on wall. 3. Remove heater from mounting bracket. WARNING: A qualified service 4. If installing bottom mounting screws into person must connect heater to gas hollow or s
Summary of the content on the page No. 12
Apply pipe joint sealant lightly to male NPT INSTALLATION threads. This will prevent excess sealant from Continued going into pipe. Excess sealant in pipe could result in clogged heater valves. CAUTION: Use only new, black iron or steel pipe. Inter- WARNING: Use pipe joint nally-tinned copper tubing may sealant that is resistant to liquid be used in certain areas. Check petroleum (LP) gas. your local codes. Use pipe of Install sediment trap in supply line as shown in large enough di
Summary of the content on the page No. 13
5. Correct all leaks at once. INSTALLATION 6. Light heater (see Operating Heater, page 14). Continued Check all other internal joints for leaks. PRESSURE TESTING GAS SUPPLY 7. Turn off heater (see To Turn Off Gas to Appli- PIPING SYSTEM ance, page 15). Test Pressures In Excess Of 1/2 PSIG 8. Replace front panel. (3.5 kPa) 1. Disconnect appliance with its appliance main Open Equipment gas valve (control valve) and equipment Shutoff Valve shutoff valve from gas supply piping system. Pressur
Summary of the content on the page No. 14
Operating Fan INSTALLATION The blower is connected to a thermostat. When unit Continued heats up, the fan will operate. A few minutes after CONNECTING TO ELECTRICAL unit cycles off or is turned off, the fan will shut SUPPLY off. The fan will cycle on and off in this manner. Note: If you have a heater with a thermostat, the heater and fan will not turn off and on at exactly WARNING: Fan accessory the same time. Fan cycle times will vary with the must be grounded. Fan comes heat setting
Summary of the content on the page No. 15
OPERATING HEATER CAUTION: Do not try to ad- Continued just heating levels by using the LIGHTING equipment shutoff valve. INSTRUCTIONS 1. STOP! Read the safety information, page 14. 2. Make sure equipment shutoff valve is fully open. 3. Turn off any electric power to the appliance if service is to be performed. Figure 19 - Control Knob In The OFF 4. Turn control knob clockwise to the Position OFF position. 5. Wait five minutes to clear out any gas. Then OFF smell for gas, including near t
Summary of the content on the page No. 16
Thermocouple OPERATING HEATER Continued Yellow Flame Note: The thermostat sensing bulb measures Pilot the temperature of air near the heater cabinet. Burner This may not always agree with room tem- perature (depending on housing construction, installation location, room size, open air tem- peratures, etc.). Frequent use of your heater will let you determine your own comfort levels. Figure 24 - Incorrect Pilot Flame Pattern MANUAL LIGHTING PROCEDURE BURNER FLAME PATTERN 1. Remove front pane
Summary of the content on the page No. 17
1. Shut off the unit, including the pilot. Allow CLEANING AND the unit to cool for at least thirty minutes. MAINTENANCE 2. Inspect burner, pilot for dust and dirt. 3. Blow air through the ports/slots and holes in WARNING: Turn off heater the burner. and let cool before cleaning. 4. Never insert objects into the pilot tube. Clean the pilot assembly also. A yellow tip on the CAUTION: You must keep - pilot flame indicates dust and dirt in the pilot as sembly. There is a small pilot air inlet
Summary of the content on the page No. 18
TROUBLESHOOTING WARNING: Turn off and unplug heater and let cool before servicing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle or similar object to clean ODS/pilot. This can damage ODS/pilot unit. Note: All troubleshooting items are listed in order of operation. OBSERVED PROBLEM POSSIBLE CAUSE REMEDY When ignitor button is pressed, 1. Ignitor electrode positioned 1. Replace pilot assembly there is no spark at ODS/pilot wrong 2. Ignitor
Summary of the content on the page No. 19
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY ODS/pilot lights but flame 1. Control knob not fully pressed in 1. Press in control knob fully goes out when control knob is 2. Control knob not pressed in 2. After ODS/pilot lights, keep released long enough control knob pressed in 30 seconds 3. Safety interlock system has 3. Wait one minute for safety in- been triggered terlock system to reset. Repeat ignition operation 4. Equipment shutoff valve not 4. Fully open equipment sh
Summary of the content on the page No. 20
TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Yellow flame during burner 1. Not enough air 1. Check burner for dirt and combustion debris. If found, clean burner (see Cleaning and Mainte- nance, page 17) 2. Gas regulator defective 2. Replace gas regulator 3. Clogged or dirty burner 3. Clean burner (see Cleaning and Maintenance, page 17) Slight smoke or odor during 1. Residues from manufacturing 1. Problem will stop after a few initial operation processes hours of operatio
