Groen CC20-E - Page 39

CC20-E
Sequence Of Events
Prior to Serial Number C7439MS
3-7
12. Relay K14 de-energizes and condensate spray valve closes. C2 is displayed
in the TIME display window. Beeper sounds.
P
hase 2
(
Oven Door Open) - add de-limer in the boiler.
13. Relays K15 and K13 energize. Boiler fills.
14. Water reaches low water probe. Relays K2 through K4, and R2 through R4
energize. Water heating elements turn on.
15. When water temperature is approximately 150°F, relays K2 through K4, and
R2 through R4, de-energize. The water heating elements turn off.
16. When water reaches high water probe, relay K13 de-energizes and the
boiler fill valve closes.
17. Relays K2, K3, K4, R2, R3, and R4 de-energize. Water heating elements
torn off.
18. Relays K2, K3, K4, R2, R3, and R4 energize and water heating elements
turn on.
19. Relay K14 energizes and condensate spray valve opens.
20. Relays K2, K3, K4, R2, R3, and R4 de-energize and water heating elements
turn off.
21. Relay K15 de-energizes. Drain valve opens and boiler drains.
22. Relay K14 de-energizes and condensate spray valve closes.
480V Unit
Operating Conditions
• Oven cavity below 200°F.
• Oven door closed.
• No service codes displayed in the time display window.
• There are no apparent oven operating problems.
Steam Mode (Prior to Serial Number C7439MS)
Refer to the Steam mode circuit diagrams on page 3-25 and/or the schematic
diagrams on page 3-34 for the following sequence of events.
1. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve
opens. Boiler fill begins.
2. Relay K6 and mercury relay R1 energize. Fan motor turns on.
3. When water reaches low water probes, relays K2, K3, R2, and R3 energize.
4. When water reaches high water probe, relay K13 de-energizes and boiler fill
valve closes.
(Revised 1/02)