2525 W CASINO RD BASE FILE 2025-01-03

service instructions TO REMOVE BURNER (2) Checking belts and pulleys for proper alignment 1. Turn off all electricity and gas to unit. and adjustment. s 2. Lower bottom pan to expose burner and manifold.see (3) Checking cleanliness of blower wheel and filters. Figure 12. 2. Keep unit free from dust, dirt, grease, and foreign 3. Disconnect pilot supply line and thermocouple lead at matter, paying particular attention to— the controls. a. Combustion air inlets. 4. Remove the two burner retaining pins holding the b. Burner ports,pilot burner,and main burner orifices burner in place.The burner can then be easily lowered (avoid use of hard,sharp instruments capable of from the unit. In replacing the burner, be certain that damaging surfaces,for cleaning these ports.)If air the slots at the front of the burner are located properly pressure is available, use air hose to blow dirt and on their shoulder rivets and that the burner retaining other foreign material from witin burner.Also check pins are put back into their proper locations. main burner orifices for blockage due to spider webs GENERAL MAINTENANCE etc. 1. Service air moving components annually. c. Primary air shutters(when used). d. Clean heat exchanger tubes from bottom with stiff a. On propeller units this includes checking motors for brush after removing burner.(Do not use wire brush.) lubrication if motors are not the permanently lubri- cated type and check fan for fit on motor shaft and e. Hinged bottom pan. for damage to blades. f. Fan blades. b. On blower units this should include: 3. Check wiring for possible loose connections. (1) Checking motor and blower bearings for lubri- 4. Where gas contains considerable impurities,occasional cation. cleaning of automatic gas valve is required. 5. Controls — See control instruction sheets furnished service diagnosis separately with the unit heater. . . MANIFOLD AIR ORIFICE . . SHUTTER h PIN i '` B j Figure 14 Figure 15 Manifold adjustment natural gas Air shutter adjustment, propane gas COMBUSTION DIAGNOSIS To realize full gas heating value requires periodic inspections with proper combustion control corrections as outlined and illustrated here. 1. LIFTING FLAMES. Lifting flames rise unevenly above the burner port and may occur on few or all the ports. Sometimes the flames drop and lift intermittently. Lifting can be eliminated by reducing primary air. If flame cannot be adjusted properly, check input rate to heater and manifold gas pressure; reduce if necessary. Check the Figure 16 orifice size with those listed in Table 5 to be sure the unit is Lifting flame condition not operating over rated input. Page 21