Groen CC20-E Operator's Manual page 107

(Revised 1/02)
7. K11 and K12 de-energized. (High and Low Air)
8. K3 de-energized. (High Boiler)
9. K14 energized. (Condensate Spray)
Combo Mode (Prior to Serial Number GC7243MS)
Refer to the Combo mode circuit diagram on page 4-16 and/or the schematic
diagram on page 4-19 for the following sequence of events.
1. Relays K15 and K13 energized. Boiler drain valve closes and boiler fill valve
opens. Boiler fill begins.
2. Relay K6 energized. Fan motor turns on.
3. Relay K12 energizes and gas valve SV2 opens.
4. Approximately 3 seconds after SV2 opens, relay K11 energizes and oven
manifold valve SV1 opens.
5. When water reaches the low level probe, K2 energizes allowing low boiler
valve SV3 to open, and K3 energizes to allow high boiler valve SV4 to open.
6. When water reaches high water probe, relay K13 de-energizes. The boiler fill
valve closes.
7. When oven cavity temperature reaches approximately 200°F, relays K11 and
K12 de-energize. Gas valves SV1 and SV2 de-energize.
8. When boiler water temperature reaches "ready" temperature, relay K3 de-
energizes causing high boiler valve SV4 to close. Relay K2 (low boiler relay)
remains energized.
9. Relay K14 energizes and the condensate spray valve opens.
10. Then relays K12 energizes and gas valve SV2 opens, approximately 3
seconds after SV2 opens, relay K1 energizes and oven manifold valve SV1
opens.
11. When the oven temperature reaches oven set temperature, relays K11 and
K12 de-energize. Gas valves SV1 and SV2 de-energize.
12. Relays K11, K12, valves SV1 and SV2 will cycle to maintain the oven set
temperature.
Relay Operation Summary
1. K15 and K13 energized. (Drain and Fill)
2. K6 energized. (Fan)
3. K12 energized. (Low Air)
4. K11 energized. (High Air)
5. K2 and K3 energized. (Low and High Boiler)
Sequence Of Events
Prior to Serial Number GC7243MS
CC10-G
4-5