Groen CC20-E Operator's Manual page 84

C/2-E
Sequence of Events
208 or 240 Volts
Oven/Meat Probe/Hold Mode
1. Mercury relay R1 energized.
2. Relay K6, K7 and K8 energizes. Fan motor turns on.
3. Relays K11, K12, R11 and R12 energize. Air heater elements turn on.
4. When the Meat Probe reaches set point temperature for at least 30 seconds
or more, relays K11, K12, R11 and R12 de-energize. Air elements turn off.
5. Relay K6, K7 and K8 energize and de-energize, cycling the fan motor on for
10 seconds and off for 30 seconds.
6. When the oven cavity cools down to the hold set point temperature, relays
K11, K12, R11 and R12 energize and de-energize to maintain the cavity
temperature.
Relay Operation Summary
1. R1 energized.
2. K6, K7 and K8 energized.
3. K11, K12, R11 and R12 energized.
4. K11, K12, R11 and R12 de-energized.
5. K6, K7 and K8 energize and de-energize.
6. K11, K12, R11 and R12 energize and de-energize.
Combo/Meat Probe/Hold Mode
1. Mercury relay R1 energized.
2. Relays K13 and K15 energized. Boiler drain valve closes and boiler fill valve
opens.
3. Relays K11, K12, R11 and R12 energize. Air elements turn on to preheat the
cavity to 200°F.
4. Relay K6, K7 and K8 energize. Fan motor turns on.
5. When water reaches low water probe, relays K2, K3, K4, R2, R3 and R4
energize. Relay K11, K12, R11 and R12 de-energize. Water heater elements
turn on and air heater elements turn off.
6. When water reaches high water probe relay K13 de-energizes and the water
fill valve closes.
7. When boiler water temperature probe reaches READY, relays K3, K4, R3
and R4 de-energize. Relay K2 and R2 remain energized and K5 energizes.
Boiler goes into low heat.
8. Relay K14 energizes. Condensate water spray valve opens.
3A-2
(Revised 1/02)