IMPORTANT: The electronic S8600 Control Module cannot be repaired. If troubleshooting procedure indicates a malfunction in the S8600 the S8600 Control Module must be replaced. Intermittent pilot systems should be serviced only by trained and experienced personnel.
SEQUENCE OF OPERATION
START
STAGE 1
TRIAL FOR
IGNITION
1THERMOSTAT (CONTROLLER)
CALLS FOR HEAT
2SPARK GENERATOR
powered by First Valve (pilot) operator opens
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| PILOT BURNER OPERATION | |||
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| Pilot burner lights. | OR | Pilot burner does not light | |||
| Module senses | Module | Response |
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| flame current. |
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| S8600A,F | Ignition spark continues, pilot valve remains | |||
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| S8610A, F | open until system is reset |
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| S8600B, H | After 15 or 90 sec. a system | |
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| S8610B, H | lock outs; must be manually reset |
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| S8600M | After on sec. a system shuts off; after 5 minutes | |
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| min. (6 minutes nom.), module restarts trial for | |
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| ignition; ignition trial, shutoff, wait sequence | |
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| repeats until pilot lights or call for heat ends. |
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| a Shutoff/lockout timing is stamped on module | ||
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STAGE 2
MAIN BURNER
OPERATION
END
4FLAME CURRENT SENSED
•Spark generator off
•Second valve operator (main) opens.
4MAIN BURNER OPERATION
Module monitors pilot flame current.
4THERMOSTAT (CONTROLLED)
SATISFIED
Valves close, pilot and main burners are off.
POWER INTERRUPTION
System shuts off, restarts when power is restored.
PILOT FLAME FAILURE
Mail valve closes.
Module starts trial for ignition.
WIRING DIAGRAM LADDER FORM
WIRING DIAGRAM HONEYWELL EP SYSTEM
S86
14
