TROUBLESHOOTING - Continued.
6.The pilot burner ignites but the sparker continues to spark and the main burners do not ignite.
a.Make the same checks and adjustments as described in Item 5.
b.Make sure that the pilot burner is not bent or damaged.
c. Make sure that the ground connections at the pilot burner, gas valve and ignitor control are intact. Check the high tension wire for good electrical connection. If all are intact, replace the ignitor module.
7.The pilot burner lights and the spark stops but the main burners do not light.
a.Check electrical connections between the ignitor con- trol and the gas valve. If intact, check for 24 volts across terminals “MV” and “COMMON” terminals. If no voltage is detected, replace the ignitor control. If voltage is pres- ent, replace the gas valve.
8.Furnace lights with roll out or one burner has delayed igni- tion.
a.Make sure that the pilot burner is aligned properly with the carryover as described in “PILOT CHECKOUT”.
b.Make sure that the carryovers on adjoining burners are screwed fast and are level with respect to one another.
9.Main burners light but exhibit erratic flame characteristics.
a.Adjust air shutters as described in “BURNER AIR SHUTTER ADJUSTMENT”.
b.Check the main burner orifices for obstruction and alignment. Removal procedure is described in “BURNER INSTRUCTIONS”. Clean or replace burner orifices and burners as needed.
Unitary Products Group | 19 |
