Wayne EHG - Page 23

23
NO
NO
NO
NO IGNITION - NO GAS FLOW
1. RESET CONTROL
–
MOTOR STARTS
–
AFTER 30 SECOND PREPURGE CYCLE AND 8 SECOND SAFE START CHECK. MOTOR CONTINUES TO RUN BUT FLAME IS NOT
ESTABLISHED
IN ORDER FOR THE FOLLOWING FUNCTIONAL TEST TO BE MADE, THE CONTROL MUST BE RESET AND THE
TESTS MONITORED DURING THE 4 SECOND HONEYWELL SERIES TRIAL FOR IGNITION THAT OCCURS AT THE
END OF THE 30 SECOND PREPURGE CYCLE, AND THE 8 SECOND
SAFE START CHECK.
2. CHECK FOR 24VAC AT THE 24V PRIMARY CONTROL INPUT TERMINALS
LABELED 24V
AND 24VGND
CHECK THE LOW VOLTAGE TRANSOFRMER FOR 24 VOLT OUTPUT. IF NO
VOLTAGE, REPLACE TRANSFORMER. CHECK WIRING CONNECTS BETWEEN
TRANSFORMER AND IGNITION CONTROL.
OK
CHECK AIR PROVING SWITCH FOR:
A. ANY IMPAIRMENT THAT WOULD KEEP IT FROM CLOSING OR OPENING.
B. ELECTRICAL CONTINUITY;SWITCH IS NORMALLY OPEN.
C. REPLACE SWITCH AS NECESSARY.
OK
3. CHECK FOR 24VAC ACROSS THE PRIMARY CONTROLS TERMINALS LABELED
“VALVE” AND “VALVE GND”. NOTE: VOLTAGE MUST BE CHECKED BURING THE 4
SECOND TRIAL FOR IGNITION
REPLACE PRIMARY CONTROL
OK
4. GO TO GAS TRAIN TROUBLESHOOTING IF NOT DONE PREVIOUSLY
FOLLOW INSTRUCTIONS
OK
5. CHECK FOR 120 VOLTS ACROSS IGNITION TRANSFORMER. NOTE: VOLTAGE MUST
BE CHECKED BURING THE 4 SECOND TRIAL FOR IGNITION
CHECK WIRING TO IGNITION TRANSFORMER. REPALCE PRIMARY CONTROL