Groen CC20-E Operator's Manual page 47

(Revised 1/02)
Two Stage Cleaning Cycle (After Serial Number C7439MS)
Refer to the schematic diagrams on pages 3-32 and 3-33 for the following
sequence of events.
Phase 1
1. Press 9-9 on the touch pad. C1 is displayed in the TIME display window.
Spray degreaser around the cavity. CL:50 is displayed in the time display
window.
2. Mercury relay R1 energized.
3. Relays K15 and K13 energize. Boiler fills.
4. Relays K6, K7, and K8 energize. Fan motor turns on.
5. Water reaches low water probe. Relays K2, K3, K4, R2, R3, and R4
energize. Water heating elements turn on.
6. Water reaches high level probe. Relay 13 de-energizes and boiler fill valve
closes.
7. Relays K2, K3, K4, R2, R3, and R4 de-energize.
8. At CL:40 relays K2, K3, K4, R2, R3, and R4 energize and water heating
elements turn on.
9. Relay K14 energizes and condensate spray valve opens.
10. Relays K2, K3, K4, R2, R3, and R4 de-energize and water heating elements
turn off.
11. Relay K15 de-energizes. Drain valve opens and boiler drains.
12. Relay K14 de-energizes and condensate spray valve closes. C2 is displayed
in the TIME display window. Beeper sounds.
Phase 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
turn off.
18. Relays K2, K3, K4, R2, R3, and R4 energize and water heating elements
turn on.
Sequence Of Events
After Serial Number C7439MS
CC20-E
3-15