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Electrical System
Page F10
Electrical Sequence for the CCM1448***1, CCM1848***1 and the CCM2148***1 Cubers.
(Manufactured from January, 2008)
CCM1448*A/W*1, CCM1848*W*1 and CCM2148*W**1 Electrical Sequence (Includes 50 hz.
And 3 Phase)
1. Suction Pressure starts out at approx 60 psi and slowly drops to close the LP Control.
2. The LP Control energizes Relay Number 2 Coil.
3. Relay Number 2A contacts C and NO close to bypass the bin switches, Relay Number 2B
contacts close and energize the timer.
4. The Timer times out and energizes Relay Number 1 Coil.
5. Relay Number 1A contacts C and NO close to send power to Cam Switch Number 2 contacts C
and NC which energizes Harvest Motor 2, Hot Gas Valves and Relay Number 3 Coil.
6. Relay Number 1B contacts C and NO close to energize Harvest Motor 1 and Hot Gas 1.
7. Relay Number 1B contacts C and NC open to de-energize the fan motors.
8. When the LP Control opens during hot gas, the circuit is latched through the Purge Switch
contacts C and NC.
9. Relay Number 3A contacts C and NO close to send power to the Selector Switch and Hot Gas
Valves when the curtain is open.
10. Once Cam Switch 2 contacts C and NO close (High Side of the Cam) it will remain energized
from the Selector Switch until contacts C and NC close. (Rotates 360 degrees)
11. Once Cam Switch 1 contacts C and NO close (High Side of the Cam) the Harvest Motor will be
energized and the Water Pump and Purge Valve will be de-energized when contacts C and NC
open.
12. With the bin switches open, Relay Number 3 Coil de-energized due to Cam Switch 2 contacts
C and NC closing, the unit will shut off on full bin.
Notes:
●C=Common
●NC=Normally Closed
●NO-Normally Open
●Relay Number 9 & 12=Common
●Relay Number 1 & 4=Normally Closed
●Relay Number 5 & 8=Normally Open
●The Fan Control on the air cooled model cycles only one fan.
●Relay 1, Puts unit into defrosts.
●Relay 2, Bypasses the Bin Switches and initiates the Timer.
●Relay 3, Bypasses the Bin Switches during harvest when Relay 2 is de-energized from a rise in
the suction pressure opening the Low Pressure Control.