C/2-E
Sequence Of Events
480 Volts
3A-4
Oven/Meat Probe/Hold Mode
1. Relay K6 and mercury relay R1 energized. Fan motor turns on.
2. Relays K11, K12, R11 and R12 energize. Air heater elements turn on.
3. 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.
4. Relays K6 and R1 energize and de-energize, cycling the fan motor on for 10
seconds and off for 30 seconds.
5. 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. K6 and R1 energized.
2. K11, K12, R11 and R12 energized.
3. K11, K12, R11 and R12 de-energized.
4. K6 and R1 energize and de-energize.
5. K11, K12, R11 and R12 energize and de-energize.
Combo/Meat Probe/Hold Mode
1. Relays K13 and K15 energized. Boiler drain valve closes and boiler fill valve
opens.
2. Relay K6 and mercury relay R1 energized. Fan motor turns on.
3. Relays K11, K12, R11 and R12 energize. Air elements turn on to preheat the
cavity to 200°F.
4. When water reaches low water probe, relays K2, K3, R2 and R3 energize.
Relay K11, K12, R11 and R12 de-energize. Water heater elements turn on
and air heater elements turn off.
5.
When water reaches high water probe relay K13 de-energizes and the water
fill valve closes.
6.
When boiler water temperature probe reaches READY, relays K3 and R3 de-
energize. Relays K2 and R2 remain energized. Boiler goes into low heat.
7. Relay K14 energizes. Condensate water spray valve opens.
8.
Relays K11, K12, R11 and R12 energize. Air heater elements turn on.
9. 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.
(Revised 1/02)
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