Desa HDL18N Owner's Operation And Installation Manual

Contents

Desa HDL18N Owner's Operation And Installation Manual Manual pdf 21 page image

www.desatech.com122493-01C 21TROUbLESHOOTINGContinuedOBSERVED PROBLEMODS/pilot lights but flamegoes out when control knobis releasedBurner does not light afterODS/pilot is litDelayed ignition of burnerBurner backfiring during com-bustionREMEDY1. Press in control knob fully2. After ODS/pilot lights, keepcontrol knob pressed in 30seconds3. Fully open equipment shut-off valve4. A) Contact local natural orpropane/LP gas companyB) Clean ODS/pilot (seeCleaning and Maintenance,page 19) or replace ODS/pilot assembly5. Hand tighten until snug,then tighten 1/4 turn more6. Replace pilot assembly7. Replace control valve1. Clean burner (see Cleaningand Maintenance, page 19)or replace burner orifice2. Contact local natural orpropane/LP gas company1. Contact local natural orpropane/LP gas company2. Clean burner (see Cleaningand Maintenance, page 19)or replace burner orifice1. Clean burner (see Cleaningand Maintenance, page 19)or replace burner orifice2. Replace damaged burner3. Replace gas regulatorPOSSIBLE CAUSE1. Control knob not fullypressed in2. Control knob not pressed inlong enough3. Equipment shutoff valve notfully open4. Pilot flame not touchingthermocouple, which al-lows thermocouple to cool,causing pilot flame to goout. This problem could becaused by one or both ofthe following:A) Low gas pressureB) Dirty or partially cloggedODS/pilot5. Thermocouple connectionloose at control valve6. Thermocouple damaged7. Control valve damaged1. Burner orifice clogged2. Inlet gas pressure is toolow1. Manifold pressure is toolow2. Burner orifice clogged1. Burner orifice is clogged ordamaged2. Damaged burner3. Gas regulator defective