Groen CC20-E Operator's Manual page 45

(Revised 1/02)
2. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve
opens. Boiler fill begins.
3. Relays K6, K7, and K8 energize. Fan motor turns on.
4. When water reaches low water probes, relays K2, K3, K4, R2, R3, and R4
energize.
5. When water reaches high water probe, relay K13 de-energizes and boiler fill
valve closes.
6. When boiler water reaches "ready" temperature, relays K3, K4, R3, and R4
de-energize. Relays K2 and R2 remain energized. K5 energized.
7. K14 energized. Condensate spray valve opens.
8. Relays K11, K12, R11, and R12 energize. Air heating elements turn on.
9. When oven temperature is 5° below temperature set point, relay K12 and
R12 de-energize. Relay K11 and R11 remain energized. Air heating
elements controlled by K11 and R11 operate at reduced power.
10. When oven temperature reaches the temperature set point, relays K11 and
R11 de-energize. Air heating elements turn off.
Relay Operation Summary
1. R1 energized. (Mercury Relay)
2. K15 and K13 energized. (Drain and Fill)
3. K6, K7, and K8 energized. (Fan)
4. K2 through K4, and R2 through R4 energized. (Water Heat)
5. K13 de-energized. (Fill)
6. K3, K4, R3, and R4 de-energized. K2, R2. (Water Heat)
7. K5 and K14 energized. (Low Water Heat)
8. K11, K12, R11, and R12 energized. (Air Heat)
9. K12 and R12 de-energized. K11 and R11 remain energized. (Air Heat)
10. K11 and R11 de-energize.
Oven Mode (After Serial Number C7439MS)
Refer to the Oven mode circuit diagrams on pages 3-22 and 3-23,
and/or the schematic diagrams on pages 3-26 and 3-27 for the
following sequence of events.
1. Mercury relay R1 energized.
2. Relays K6, K7, and K8 energize. Fan motor turns on.
3. Relays K11, K12, R11, and R12 energize. Air heating elements turn on.
Sequence Of Events
After Serial Number C7439MS
CC20-E
3-13