Scotsman FME800R Manuel de service télécharger pdf (Page 19)

OPERATION: Refrigeration

PUMP DOWN

During the pump down cycle (usually initiated by

the circuit board de-energizing the liquid line valve)

the discharge gases flow through their normal path

to the remote condenser, through the head

pressure control, and into the receiver.

At this point the refrigerant flow is stopped by the

closed liquid line valve. This action forces the

refrigerant into the receiver and keeps it out of the

compressor. The pump down continues until the

low pressure control turns the compressor off.

DISCHARGE

LINE

LIQUID LINE

HEAD

PRESSURE

CONTROL

VALVE

RECEIVER

COMPRESSOR

Refrigeration Schematic

KING

VALVE

SUCTION

LINE

LIQUID LINE

VALVE

REMOTE CONDENSER

THERMOSTATIC

EXPANSION

VALVE

EVAPORATOR

FME800R

August 1993

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Scotsman FME800R Manuel de service Page 19