Manual Gram PRIMA-BOX (page 14 of 45) (English, German, Danish, Swedish)

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English

Please read this booklet carefully.

It has been produced to provide details and advice on the correct method of installing and

using this unit so as to maximise reliability, efficiency and long life.

DESCRIPTION

The GM units are a series of air cooled (water cooled available as an option) condensing

units built on the monoblock principle. They consist of:

- condensing unit (on outside of cold room)

- evaporating unit (on inside of cold room)

- control panel, fitted to condensing unit

OPERATING PRINCIPLE

The GM series are refrigeration units incorporating hermetic compressors powered by

electrical mains supply (single or three phase) and using HFC or HCFC refrigerant.

The refrigerant is pumped through the evaporator inside the room where it absorbs heat

thereby cooling the cold room. The refrigerant then passes to the condenser where the

absorbed heat is dissipated into the ambient air giving back its refrigerating capacity. The

cycle is then repeated.

There is also an automatic defrosting phase which is pre-programmed but adjustable by

the user. Its frequency is cyclic.

INSTALLATION

For a correct installation please read :

3.1 Mounting of unit on the cold room

3.2 Fitting remote panel (optional)

3.3 Electrical connection

3.4 Water connection (in the case of a water cooled condenser)

In order to obtain optimum functioning of the unit ensure the following :-

A) Position the unit in a well ventilated location and away from other heat

sources

B) Limit the number of door openings

C) Ensure the unit has a good fresh air supply to the suction side (front) and a

good removal of air from the discharge side (top)

D) Fit a drain line to the defrost water drain connection inside the condensing

unit

N.B. For GM 1-2-3 models fitted with automatic evaporation of defrost water this is

just a precaution in case of overflow.

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Gram PRIMA-BOX Manual

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