Wayne EHG - Page 24

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LOSES FLAME DURING CYCLE – CONTROL LOCKS OUT ON SAFETY
1. RESET CONTROL:
-
COMPLETES 30 SECOND PREPURGE CYCLE, AND 8 SECOND SAFE START CHECK.
-FLAME IS ESTABLISHED.
-SOMETIMES THE CONTROL LOCKS OUT BEFORE THE THERMOSTAT OR CONTROLLING CIRCUIT IS SATISFIED.
2. DISCONNECT FLAMEROD LEAD FROM PRIMARY CONTROL. CONNECT (+) POSITIVE LEAD (DC) MICROAMPERE
METER TO THE PRIMARY CONTROL TERMINAL. CONNECT THE (-) NEGATIVE MICROAMPERE METER LEAD TO
THE FLAMEROD TERMINAL (SEE FIGURE 9) FLAME CURRENT MEASUREMENT.
2. RESET CONTROL, AFTER PREPURGE CYCLE, FLAME IS ESTABLISHED. A STABLE MICROAMPERE CURRENT OF
.8 OR MORE IS REQUIRED FOR DEPENDABLE OPERATION.
PROBABLE CAUSE OF ERRATIC LOCKOUT:
1. FLAME PROVING CIRCUIT GROUNDED BY
MOISTURE.
2. DAMAGED INSULATION ON FLAMEROD LEAD.
3. FLAMEROD IMPROPERLY POSITIONED IN
FLAME (FIG 1)
4. POOR GROUND PATH TO PRIMARY CONTROL.
5. DEFECTIVE PRIMARY CONTROL.
6. READ MANUAL SECTION “FLAME SENSING”.
7. DEPOSITS ON FLAME ROD. REFER TO
TECHINCAL INFORMATION, PAGE 34.
8. INSURE GROUND ROD AT END OF AIR TUBE IS
IN PLACE. SEE FIGURE 28
9. APPLICABLE TO HONEYWELL S89 SERIES
PRIMARY IGNITION CONTROLS: CONNECT L1 TO
THE BLACK LEAD AND L2 TO THE WHITE LEAD
EXITING THE S89 OTHERWISE THE S89 WILL
NOT DETECT THE FLAME AND LOCK OUT.
4. MICROAMPERE READING IS LESS THAN .8 OR UNSTABLE.
PROBALE CAUSES:
1. EXTREMELY POOR COMBUSTION LEVEL.
2. FLAMEROD IMPROPERLY POSITIONED IN
FLAME.
3. DEFECTIVE PRIMARY CONTROL.
NO