Wayne EHG - Page 20

20
OK
OK
OK
IGNITION ARC ESTABLISHED – NO FLAME
1. RESET CONTROL
-
MOTOR STARTS
-
COMPLETES 30 SECOND PREPURGE CYCLE, 8 SECOND SAFE START CHECK AND TRIAL FOR
IGNITION, 4 SECONDS HONEYWELL SERIES
S89F.
NOTE:THE BURNER MOTOR WILL CONTINUE TO OPERATE DURING THE LOCK OUT MODE WHEN THE THERMOSTAT CIRCUIT IS CALLING FOR BURNER OPERATION.
2. CHECK FOR CORRECT GAS PRESSURE AT MANIFOLD. IF NECESSARY, ADJUST PER FIGURE 3. IF
NO GAS PRESSURE CONTINUE BELOW.
IN ORDER FOR THE FOLLOWING FUNCTIONAL TEST TO BE MAD
E, THE CONTROL MUST BE RESET AND THE TESTS MONITORED DURING THE 4 SECOND TRIAL FOR IGNITION
PERIOD THAT OCCURS AT THE END OF THE 30 SECOND PREPURGE AND 8 SECOND SAFE START CHECK CYCLE.
4
. CHECK FOR 24
VAC AT GAS VALVE
RELAY
TERMINALS 1 AND
3.
NOTE: VOLTAGE WILL ONLY BE PRESENT DURING IGNITION
TRIAL.
OK
OK
CHECK ELECTRICAL W
IRING AND CONNECTIONS. BE
SURE LEADS ARE ON CORRECT GAS VALVE
TERMINALS. VERIFY TRANSFORMER VOLTAGE OUTPUT
OF 24VAC
REPLACE PRIMARY
IGNITION CONTROL.
5. CHECK FOR 120 VOLTS BETWEEN TERMINAL 2 ON GAS VALVE
RELAY AND L2.
6. CHECK FOR 120 VOLTS BETWEEN TERMINAL 4 ON GAS VALVE
RELAY AND L2. VOLTAGE IS ONLY PRESENT DURING TRIAL FOR
IGNITION.
OK
NO
OK
ADJUST AIR SHUTTER
PER FIGURE 8. AFTER THE BURNER
FIRES, SET UP THE BURNER PER SECTION II.
3. CHECK FOR 120
V
OLTS ACROSS WIRES FEEDING
GAS
TRAIN.
NOTE: VOLTAGE WILL ONLY BE PRESENT DURING
IGNITION TRIAL. IF NO VOLTAGE CONTINUE BELOW.
IF VOLTAGE IS PRESENT, PROCEED TO GAS TRAIN
TROUBLESHOOTING.
NO
CHECK ELECTRICAL WIRING AND CONNECTIONS
BETWEEN TERMINAL 2 ON GAS VALVE RELAY AND L1.
NO
REPLACE GAS VALVE RELAY.
AT THIS POINT, RECHECK VOLTAGE ACROSS WIRES
FEEDING GAS TRAIN. VOLTAGE SHOULD BE PRESENT
DURING IGNITION TRIAL.