(Revised 1/02)
CC20-G
Sequence Of Events
After Serial Number GC7243MS
5-12
14. Relay K15 energizes and drain valve closes. K13 energizes and boiler fill valve
opens. Boiler fills.
1
5. When water reaches low water level probe, relays K2 and K3 energize.
Gas valves SV3 and SV4 open.
16. When water reaches the high water level probe, relay K13 de-energizes and
boiler fill valve closes.
17. When water temperature is approximately 205°F, relay K14 energizes allowing
the condensate spray valve to open.
18. Relays K2 and K3 de-energize. Gas valves SV3 and SV4 close.
19. Relay K15 de-energizes. Drain valve opens.
20. Relay K14 de-energizes. Condensate spray valve closes.
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