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9. Open tees should not be used in the flue pipe. 10. Appliance must not be connected to a chimney flue that is servicing a separate solid-fuel burning appliance. For proper venting, do not attach a 90° elbow directly to draft diverter. If possible, attach 2 feet (.6m) of straight vent pipe before an elbow is used. Use 45° elbows if possible. Uninsulated single-wall metal pipe shall not be used outdoors in cold climates for venting gas utilization equipment. Ventilation and Combustion Air Room heaters shall be installed in a location in which the facilities for ventilation permit satisfactory combustion of gas and proper venting under normal conditions. In buildings of conventional frame, brick or stone construction without tight storm windows and doors, infiltration is normally adequate to provide for combustion and draft hood dilution. Where appliances are installed in a confined space within a building, the building being of unusually tight construction, air for combustion and ventilation must be obtained directly from outdoors or from such spaces that freely communicate with the outdoors. Under these conditions, the confined space shall be provided with two permanent openings, one near the top of the enclosure and one near the bottom; each opening shall have a free area of not less than one square inch (6.5cm2)per 1,000 BTU’s (.3KW/H) of total input. The draft hood must be in the same atmospheric pressure zone as the combustion air inlet to the appliance. Liner and Insulated Liner When you install a vented room heater into a masonry chimney you must follow these steps. 1. The chimney must be lined and sized properly. Most masonry chimneys are over sized and absorb too much heat to be considered a proper vent. If you have any doubts line the chimney with the right size liner. If it’s unlined you must line it. 2. Use an insulated liner when the chimney is on the outside, three sides exposed to the weather, and there is no clay liner in the chimney. The insulation will help keep the flue gases warmer. Insulated Vent Enclosure Vented room heaters installed with the vent going directly to the outside and above the eaves can cause poor venting. The cold pipe will have a delay in proper venting and cause the room heater to shut “off” by the vent safety switch. To prevent delayed venting as well as condensation of flue products an insulated enclosure is recommended. Use type B 4" (102mm) diameter vent pipe and maintain at least a one inch (25mm) clearance to combustibles. Use metal thimble to protect vent pipe as it passes through combustibles. Figure 3 MORE THAN 10' (3m) 10' (3m) 2' (.6m) HEIGHT ABOVE ANY ROOF SURFACE WITHIN 10' (3m) HORIZONTALLY 3' (.9m) VENT SAFETY SHUTOFF SYSTEM VENT SAFETY SHUTOFF SYSTEM This heater must be properly connected to a venting system. This heater is equipped with a vent safety shutoff system. Warning: Operation of this heater, when not connected to a properly installed and maintained venting system or tampering with the vent safety shutoff system, can result in carbon monoxide (CO) poisoning and possible death. This appliance needs fresh air for safe operation and must be installed so there are provisions for adequate combustion and ventilation air. This room heater is equipped with a vent safety switch. The vent safety switch will cause gas flow to the pilot to “shut off” due to improper venting or a blocked flue. If the vent safety switch continues to “shut off” the gas flow to the pilot a qualified service person must be contacted to inspect for improper venting, blockage in the vent pipe or the vent safety switch for being defective. REVERSIBLE VERTICAL OR HORIZONTAL DRAFT DIVERTER This room heater has a reversible draft diverter. The draft diverter is installed in the vertical position at the factory. Please use the following steps to change the draft diverter from the vertical position to the horizontal position. 1. Remove L280 vent safety switch from the draft diverter. 2. Inside your yellow instruction envelope will be a 1 1/2" x 2 1/4" (38mm x 51mm) vent safety switch hole cover plate and two (2) 1/2" screws for attachment of vent safety switch hole cover plate to the draft diverter. Attach vent safety switch hole cover plate over hole on the draft diverter from which the L280 vent safety switch was removed. 3. Remove two (2) screws at bottom of draft diverter and lift upward to remove draft diverter from the draft diverter plate. Rotate draft diverter into the horizontal position and slide back into the draft diverter plate. Attach two (2) screws into bottom of the draft diverter. 4. Remove vent safety switch hole knockout and two (2) knockouts for screws on opposite side of draft diverter. 5. Attach L280 vent safety switch to the draft diverter. 6. Repositioning of the draft diverter is completed. DRAFT DIVERTER CAN BE EITHER A VERTICAL VENT OR HORIZONTAL VENT Figure 4 THERMOSTAT OPERATION Thermostat Operation Attention: If no heat is desired, turn the gas control kn...

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