EH330, EH430 and ECC Condensing Unit
Remote Low Side Cuber Service Manual
July 2013
Page 37
Harvest Cycle Sequence of Operation
When harvest begins, the controller connects
power to the external relay for the condensing unit's
solenoids.
It also connects power to the vapor inlet solenoid
valves in the cabinet of the EH head.
The vapor inlet solenoid valves and the condenser
bypass valve open. The receiver inlet solenoid valve
closes. Vapor flows from the condensing unit to the
EH head evaporator inlets.
The water pump and purge valve will be on for a
period of time during the first part of harvest to purge
the water reservoir of a portion of the water.
The inlet water solenoid valve opens to fill the
reservoir when the water level sensor indicates an
empty sump. It continues to fill when the pump and
purge valve have shut off and will stop filling when the
water level sensor senses a full sump.
Harvest will continue until both curtains have opened.
The curtain switch, attached to the edge of each
curtain, will sense the curtain opening.
If the curtains both close, harvest will terminate and
the freeze cycle will resume.
If one or both of the curtains remains open for 30
seconds, the machine will shut down
