desa international unvented (vent-free) propane gas log heater

TROUBLE-SHOOTINGContinuedOBSERVEDPROBLEMOne or both burnersdo not light afterODS/pilot is litPOSSIBLECAUSE1. Inlet gas pressure istoo low2. Burner orifice(s)clogged3. Mislocated crossovertube4. Burner orifice(s)diameter is too smallREMEDY1. Contact local propanegas company2. Clean burner(s) (seeCleaning and Maintenance,page 25) orreplace burner orifice(s)3. Contact qualified serviceperson4. Replace burner orifice(s)Delayed ignition ofone or both burners1. Manifold pressure istoo low2. Burner orifice(s)clogged3. Mislocated crossovertube1. Contact local propanegas company2. Clean burner(s) (seeCleaning and Maintenance,page 25) orreplace burner orifice(s)3. Contact qualified servicepersonBurner backfiringduring combustion1. Burner orifice isclogged or damaged2. Damaged burner3. Gas regulator defective1. Clean burner (seeCleaning and Maintenance,page 25) orreplace burner orifice2. Replace damaged burner3. Replace gas regulatorYellow flame in frontburner during burnercombustion1. Not enough air2. Gas regulator defective1. Check burner(s) for dirtand debris. If found,clean burner(s) (seeCleaning and Maintenance,page 25)2. Replace gas regulatorSlight smoke or odorduring initial operation1. Residues from manufacturingprocessesand logs curing1. Problem will stop after afew hours of operationHeater produces awhistling noise whenburners are lit1. Turning control knobto HI position whenburners are cold2. Air in gas line3. Air passageways onheater blocked4. Dirty or partiallyclogged burnerorifice(s)1. Turn control knob to LOposition and let warm upfor a minute2. Operate burners until airis removed from line.Have gas line checkedby local propane gascompany3. Observe minimuminstallation clearances(see pages 10-13)4. Clean burners (seeCleaning and Maintenance,page 25) orreplace burner orifice(s)Moisture/condensationnoticed on windows1. Not enough combustion/ventilationair1. Refer to Air for Combustionand Ventilationrequirements (page 5)Continued27101309