Groen CC20-E Operator's Manual page 36

CC20-E
Sequence Of Events
Prior to Serial Number C7439MS
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.
7. K5 and K14 energized. Condensate spray valve opens.
8. Relays K11, K12, R11, and R12 energize. Air heating elements turn on.
9. When oven temperature reaches the temperature set point, relays K11, K12,
R11, and R12 de-energize. Air heating elements turn off.
10. Relays K11, K12, R11, and R12 will cycle ON and OFF to maintain oven
temperature.
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. K11, K12, R11, and R12 de-energized. (Air Heat)
10. K11, K12, R11, and R12 energize and de-energize.
Oven Mode (Prior to Serial Number C7439MS)
Refer to the Oven mode circuit diagrams on pages 3-29 and 3-30,
and/or the schematic diagrams on pages 3-32 and 3-33 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.
3-4
(Revised 1/02)