Groen CC20-E Operator's Manual page 179

11. K14 energizes.
12. K11 and K12 de-energize.
Oven/Meat Probe/Hold Mode
1. Relays K15 and K13 energize. Boiler drain valve closes and boiler fill valve
opens. Boiler water fill begins.
2. Relay K6 energizes. Fan motor turns on.
3. Relay K12 energizes allowing gas valve SV2 to open. Pilot runner tube opens.
4. After 7 seconds, relay K11 energizes and the air manifold gas valve SV1
opens. Air burner turns on.
5. When water reaches the low water probe, K2 and K3 energize allowing the
boiler low fire gas valve SV3 and boiler high fire gas valve SV4 to open.
6. When water reaches the high water level probe, relay K13 de-energizes. The
boiler water fill valve closes.
7. When the boiler water temperature reaches 150°F, relay K3 de-energizes and
SV4 boiler high fire gas valve closes.
8. Relay K2 remains energized until the boiler water temperature reaches
approximately 160°F.
9. Relay K2 de-energizes and SV3 boiler low fire gas valve closes. Relay K2 and
SV3 will cycle on and off to maintain the 160°F water temperature.
10. When the Meat Probe reaches set point temperature for at least 30 seconds
or more, relays K11 and K12 de-energize. Air elements turn off.
11. Relay K6 will energize and de-energize, cycling the fan on for 10 seconds and
off for 30 seconds.
12. When the oven cavity cools down to the hold set point temperature, relay K12
energizes allowing gas valve SV2 to open. Pilot runner tube opens.
13. After 7 seconds, relay K11 energizes and the air manifold gas valve SV1
opens. Air burner cycles on and off to maintain the cavity temperature.
Relay Operation Summary
1. K15 and K13 energized.
2. K6 energized.
3. K12 energized.
4. K11 energized.
5. K2 and K3 energized.
6. K13 de-energized.
7. K3 de-energized.
C/2-G
Sequence Of Events
5A-5