Groen CC20-E Operator's Manual page 50

CC20-E
Sequence Of Events
After Serial Number C7439MS
Oven Mode (After Serial Number C7439MS)
Refer to the Oven mode circuit diagrams on page 3-28 and/or the schematic
diagrams on page 3-34 for the following sequence of events.
1. Mercury relay R1 and relay K6 energize. Fan motor turns on.
2. Relays K11, K12, R11, and R12 energize. Air heating elements turn on.
3. When oven temperature is 5° below temperature set point, relay K12 and
R12 de-energize. K11 and R11 remain energized and air heating elements
operate at reduced power.
4. When oven temperature reaches the temperature set point, relays K11 and
R11 de-energize. Air heating elements turn off.
Relay Operation Summary
1. K6 and R1 energized. (Fan)
2. K11, K12, R11, and R12 energized. (Air Heat)
3. K12 and R12 de-energize. K11 and R11 remain energized. (Air Heat)
4. K11 and R11 de-energized.
Hold Mode (Manual) (After Serial Number C7439MS)
Refer to the schematic diagrams on page 3-34 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. Relay K6 and mercury relay R1 energize. Fan motor turns on.
2. Relays K11, K12, R11, and R12 energize. Air heating elements turn on.
3. When oven air temperature is 5° below temperature set point, relays K12
and R12 de-energize. Relays K11 and R11 remain energized. Air heating
elements controlled by K11 and R11 operate at reduced power.
4. When oven temperature reaches the temperature set point, relays K11 and
R11 de-energize. Air heating elements turn off.
Relay Operation Summary
1. K6 and R1 energized. (Fan)
2. K11, K12, R11, and R12 energized. (Air Heat)
3. K12 and R12 de-energized. K11 and R11 remain energized. (Low Air Heat)
4. K11 and R12 de-energized. (Air Heat)
3-18
(Revised 1/02)