Honeywell S8702 - Manuals

69-1174 5 S8701/S8702 DIRECT SPARK IGNITION CONTROLS NOTE: If the gas control has been replaced or serviced,lightoff may not be satisfactory until air has beenpurged from the gas line or the gas input andcombustion air have been adjusted (seemanufacturer’s instructions). Table 6. Trial for Ignition ...

69-1174 7 S8701/S8702 DIRECT SPARK IGNITION CONTROLS Fig. 5. S8701/S8702 Sequence of Operation for Retry Models (E, F, L and M Models). SERVICE IMPORTANT 1. Only persons trained and experienced in DSI systems should service this equipment. 2. If a condition exists that causes the S8701 or S8702 cont...

69-1174 8 S8701/S8702 DIRECT SPARK IGNITION CONTROLS 6. Check the flame sensor and its mounting bracket. Correct the position if bent out of shape. 7. Review the S8701/S8702 normal sequence of operation. See START SYSTEM section. S8701/S8702 COMPONENT CHECKS Spark Ignition Circuit The step-up transf...

69-1174 9 S8701/S8702 DIRECT SPARK IGNITION CONTROLS CHECK BURNER FLAME CONDITION NOISY LIFTING FLAME BURNER WAVING FLAME SMALL BLUE FLAME LAZY YELLOW FLAME GOOD RECTIFYING FLAME 1 IN. (25.4 MM) 1/4 TO 1/2 IN. (6.4 TO 12.7 MM) M18055 CHECK FOR:• HIGH GAS PRESSURE• EXCESS PRIMARY AIR OR DRAFT CHECK F...