Service Mnaual

11
2. Prep Table
Prep Table/Mega Top Sequence Flow Chart
2. Cool Down
3. Cool Down Achieved
CTh closed
Comp energized
ConFM energized
EvapFM energized
(with DH)
CTh open
EvapFM energized
Comp de-energized
ConFM de-energized
4. Defrost
8 or 6-hr. DT terminates
20 or 25-min. DT starts
DH de-energized (if applicable)
CTh above setpoint
CTh cools to setpoint
CTh above setpoint CTh above setpoint
20 or 25 min. DT in
control
CTh in control
1. Startup
EvapFM energized
(without DH)
8 or 6-hr. DT terminates
20 or 25-min. DT starts
DH energized
EvapFM energized (without DH)
Comp de-energized
ConFM de-energized
EvapFM de-energized (with DH)
Legend:
Comp-compressor
ConFM-condenser fan motor
CTh-cabinet thermostat
DH-defrost heater
DT-defrost timer
EvapFM-evaporator fan motor
MH-mullion heater
PH-perimeter heater
Freezer Sequence Flow Chart
1. Startup/Cool Down
2. Cool Down Achieved
CTh closed
Comp energized
ConFM energized
EvapFM energized
MH energized
PH energized
CTh open
Comp de-energized
ConFM de-energized
EvapFM de-energized
MH de-energized
PH de-energized
3. Defrost
8 or 6-hr. DT terminates
20 or 25-min. DT starts
DH energized
Comp de-energized
ConFM de-energized
EvapFM de-energized
MH de-energized
PH de-energized
20 or 25-min. DT terminates
8 or 6-hr. DT starts
DH de-energized
CTh in control
CTh above setpoint
CTh cools to setpoint
CTh above setpoint
CTh above setpoint
DT* in control
Legend:
Comp-compressor
ConFM-condenser fan motor
CTh-cabinet thermostat
DH-defrost heater
DT-defrost timer
EvapFM-evaporator fan motor
MH-mullion heater
PH-perimeter heater
3. Undercounter and Work Top: Freezer