Groen CC20-E Operator's Manual page 46

CC20-E
Sequence Of Events
After Serial Number C7439MS
4. When oven temperature is 5° below temperature set point, relay K12 and
R12 de-energize. Relay K11 and R11 remain energized. Air heating
elements controlled by K11 and R11 operate at reduced power.
5. When oven temperature reaches the temperature set point, relays K11 and
R11 de-energize. Air heating elements turn off.
Relay Operation Summary
1. R1 energized. (Mercury Relay)
2. K6, K7, and K8 energized. (Fan)
3. K11, K12, R11, and R12 energized. (Air Heat)
4. K12 and R12 de-energized. K11 and R11 remain energized. (Air Heat)
5. K11 and R11 de-energized.
Hold Mode (Manual) (After Serial Number C7439MS)
Refer to the schematic diagrams on pages 3-32 and 3-33 for the following
sequence of events.
NOTE: Low humidity on older panels only. When "Lo" humidity is selected there
is no water in steam generator.
1. Mercury relay R1 energized.
2. Relays K6, K7, and K8 energize. Fan motor turns on. Fan will cycle on and
off as required.
3. Relays K11, K12, R11, and R12 energize. Air heating elements turn on.
4. When oven air temperature is 5° below temperature set point, relays K12
and R12 de-energize. Air heating elements operate at reduced power.
5. When oven temperature reaches the temperature set point, relays K11 and
R11 de-energize. Air heating elements turn off.
Relay Operation Summary
1. R1 energized. (Mercury Relay)
2. K6, K7 and K8 energized. (Fan)
3. K11, K12, R11, and R12 energized. (Air Heat)
4. K12 and R12 de-energized. (Low Air Heat)
5. K11 and R11 de-energized. (High Air Heat)
3-14
(Revised 1/02)