Manitowoc indigo series Technician's Handbook page 33

Head Pressure Control Valve
Any remote condenser connected to a Manitowoc
Ice Machine must have a head pressure control valve
(available from Manitowoc Distributors) installed on the
condenser package. Manitowoc will not accept substitute
"off the shelf" head pressure control valves
Do not use a fan cycling control to try to maintain
discharge pressure. Compressor failure will result.
Fan Motor
The condenser fan must be on during the complete ice
machine freeze cycle (do not cycle on fan cycle control).
The ice maker has a condenser fan motor circuit for use
with a Manitowoc condenser. It is recommended that
this circuit be used to control the condenser fan(s) on the
multi-circuit condenser to assure it is on at the proper
time. Do not exceed the rated amps for the fan motor
circuit listed on the ice machine's serial tag.
Internal Condenser Volume
The multi-circuit condenser internal volume must not be
less than or exceed that used by Manitowoc (see chart on
next page). Do not exceed internal volume and try to add
charge to compensate, as compressor failure will result.
Part Number STH025 11/16
CAUTION
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33