Groen CC20-E Operator's Manual page 10

(Revised 1/02)
Operating Conditions
• Oven cavity below 200°F.
• Oven door closed.
• No service codes displayed in the time display window.
• There are no apparent oven operating problems.
Steam Mode (After Serial Number C7439MS)
Refer to the Steam mode circuit diagrams on page 2-13 and/or the schematic
diagrams on pages 2-16 and 2-17 for the following sequence of events.
1. Relays K15 and K13 energized. Boiler drain valve closes and boiler fill valve
opens. Boiler fill begins. Relay K9 through K12 energizes air elements.
2. Relay K6 energized. Fan motor turns on.
3. When water reaches low water probes, relays K1, K2, K3, and K4 energize.
High water heating elements turn on. Relay K9 through K12 de-energize
4. When water reaches high water probe, relay K13 de-energizes and boiler fill
valve closes.
5. When boiler water reaches "ready" temperature, relays K1, K3, and K4 de-
energize and K2 remains energized. K5 energizes and the water heating
elements go to low heat. Relays K9 through K12 energize until cavity is at
200°F. Relay K9 through K12 de-energize.
Relay Operation Summary
1. K15 and K13 energized. (Drain and Fill)
2. K6 energized. (Fan)
3. K1 through K4 energized. (Boiler Heat)
4. K13 de-energized. (Fill)
5. K1, K3 and K4 de-energized. (Boiler Heat). K2 remains energized, K5
energized, K9 through K12 energized.
6. K9 through K12 de-energized.
Combo Mode (After Serial Number C7439MS)
Refer to the Combo mode circuit diagrams on page 2-14 and/or the schematic
diagrams on pages 2-16 and 2-17 for the following sequence of events.
1. Relays K15 and K13 energized. Boiler drain valve closes and boiler fill valve
opens. Boiler fill begins. Relay K9 through K12 energizes air elements.
2. Relay K6 energized. Fan motor turns on.
Sequence Of Events
After Serial Number C7439MS
CC10-E
2-7