50996841. Remove all packing items applied to heater for shipment. Keep plastic covercaps (attached to inlet connector and hose/regulator assembly) for storage.2. Remove all items from carton.3. Check all items for shipping damage. If heater is damaged, promptly informdealer where you bought heater.UNPACKINGTHEORY OFOPERATIONThe Fuel System: The hose/regulator assembly attaches to the propane gassupply. This provides fuel to the heater.The Ignition System: The piezo ignitor lights the pilot fuel supply. The pilotignites the main burner.The Automatic Control System: This system causes the heater to shut downif the flame goes out.PROPANESUPPLYYou must provide propane gas and propane tank(s).Use this heater only with a propane vapor withdrawal supply system. SeeChapter 5 of the Standard for Storage and Handling of Liquefied Petroleum Gas,ANSI/NFPA 58 and/or CAN/CGA B149.2. Your local library or fire departmentwill have this booklet.This heater will operate with a 20-pound propane tank. However, you can onlyoperate it in the LOW position during mildly cool weather. At higher heat settingsor during colder weather, you must use larger tanks.The amount of propane gas ready for use from propane tanks varies. Two factorsdecide this amount.1. The amount of propane gas in tank(s)2. The temperature of tank(s)The chart below shows the minimum number of 100-pound tanks needed to runthe heater. Connect tanks together with a manifold.Less gas is vaporized at lower temperatures. Your local propane gas dealer willhelp you select the proper supply system.Average Temperature (°F)At Tank Location 60° 40° 32° 20° 10° 0°Number Of Tanks 1 1 1 1 2 2VENTILATION WARNINGProvide at least a 2.5 square foot opening of fresh, outside airwhile running heater. If proper fresh, outside air ventilation isnot provided, carbon monoxide poisoning can occur. Provideproper fresh, outside air ventilation before running heater.