3-11
(Revised 1/02)
CC20-E
Sequence Of Events
Prior to Serial Number C7439MS
Phase 2 (Oven Door Open) - add de-limer to the boiler.
11. Relays K15 and K13 energize. Drain valve closes and boiler fill valve opens.
Boiler fills.
12. Relays K2, K3, R2, and R3 energize. Water heating elements turn on.
13. When water temperature is approximately 150°F, relays K2, K3, R2, and R3
de-energize. The water heating elements turn off.
14. Relays K2, K3, R2, and R3 energize and water heating elements turn on.
15. Relay K14 energizes and condensate spray valve opens.
16. Relay K15 de-energizes. Drain valve opens and boiler drains.
17. Relays K2, K3, R2, and R3 de-energize and water heating elements turn off.
18. Relay K14 de-energizes and condensate spray valve closes.
19. Relays K15 and K13 energize. Drain valve closes and boiler fill valve opens.
Boiler fills.
20. Relays K2, K3, R2, and R3 energize. Water heating elements turn on.
21. Relay K14 energizes and condensate spray valve K14 opens.
22. Relay K15 de-energizes and boiler drain valve opens. Boiler drains.
23. Relays K2, K3, R2, and R3 de-energize and water heating elements turn off.
24. Relay K14 de-energizes and condensate spray valve closes.
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