Stoelting VB25 Freezer, Operating Manual

English
Operating instructions

9

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The electric capacity of the system must exactly match the supply’s voltage and frequency required by the device;

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the current capacity of the system must be suitable for the device’s input;

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the system must end with an accepted 4 pole electric socket and with electric and mechanical suitable characteristics.
The electric socket’s poles must be marked with appropriate letters (phases R- S- T + earth);  the earth’s pole must be
recognizable;

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the electric socket must prevent,  through appropriate mechanical measures,  the plug’s wrong connection;

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the electric socket must have,  above or annexed,  a breaker,  conformed to the in force safety laws,  with an associated
gearing placed near the device,  in a position easily reachable by the operator.  It must also be protected by fuses,
above or annexed,  with characteristics suited at the current absorbed by the device.

A WRONG CONNECTION ON THE EARTH TERMINAL MAY CAUSE SERIOUS DANGER.

A 4 pole plug,  suitable with the current socket,  must be installed at the end of the
device's power supply cable.

The device’s power supply cable is composed by 4 coloured wires,  and eventually
marked with appropriate bands,  which must be connected to the relevant plug’s termi-
nals,  as shown in the following table.

A WRONG CONNECTION IN THE PLUG’S INSIDE MAY CAUSE SERI-
OUS DANGER. FOR THE CONNECTION, ONLY ADDRESS YOUR
SELVES TO QUALIFIED AND AUTHORIZED TECHNICIANS.

Kind

Wire

Wire

Code marked near

of supply

colour

marking band

plug’s terminal

EARTH

GREEN/YELLOW

None

PE or 

Phase R

BLACK

R or L1

Phase S

BROWN

S or L2

Phase T

BLACK

T or L3

Before using the device it is necessary to:

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connect it to the water network, if the device features a water condenser (Ref. Par. 5.4);

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carry out the initial functioning checking (Ref. Par. 5.5).

5.4

Connection to the water network (devices with water condensation)

If your device features water condensation,  it is necessary to prepare tubes for the feeding and draining of the water.

Do not let water from a TOWER in, unless they have been specifically designed to utilize water from a
tower. Unless otherwise specified, the machine is designed to utilize water from a WELL.

Note:

the correct water temperature to start the machine is specified in the Technical Handbook, Par. “Technical
data”.

The use of below standard tubes and connections may cause water drops, with consequent inconven-
iences for Your laboratory and, if the drop is abundant with squirts, it damages the device.