Groen CC20-E Operator's Manual page 146

CC20-G
Sequence Of Events
After Serial Number GC7243MS
Operating Conditions
• Pilot burner flame established.
• Oven cavity below 200°F.
• Oven door closed.
• No service codes displayed in the time display window. Press
COMBO key and ON simultaneously.
• There are no apparent oven operating problems.
Steam Mode (After Serial Number GC7243MS)
Refer to the Steam mode circuit diagram on page 5-16 and/or the schematic
diagram on page 5-19 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. Relays K11 and K12 energize and oven valves SV2 and SV1 open to preheat
the cavity to 200°F.
3. Relay K6 energized. Fan motor turns on.
4. Relay K12 energizes and gas valve SV2 opens.
5. After 7 seconds SV2 opens, relay K11 energizes and oven manifold valve SV1
opens.
6. When water reaches the low level probe, K2 energizes allowing low boiler
valve SV3 to open,
valve SV4 to open. Relay K3 will cycle on for 3 minutes and off for 30 seconds.
7. When water reaches high water probe, relay K13 de-energizes. The boiler fill
valve closes.
8. When oven cavity temperature reaches approximately 200°F, relays K11 and
K12 de-energize. Oven manifold valve SV1 and gas valve SV2 de-energize.
9. When boiler water temperature reaches "ready" temperature, relays K2 and K3
de-energize causing low boiler valve SV3 and high boiler valve SV4 to close.
10. Relay K14 energizes and the condensate spray valve opens.
11. During the standby (not cooking) relay K2 will cycle on every 2 minutes for 1
minute to keep the water temperature at Ready.
12. During the Cook cycle, relays K2, K3, SV3 and SV4 are energized. Relay K3
will cycle oven for 3 minutes and de-energize for 30 seconds.
Relay Operation Summary
1. K15 and K13 energized. (Drain and Fill)
2. K11 and K12 energized.
5-8
and K3 energizes to allow high boiler