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INSTALLATION
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The electrical panel is located inside the unit in the upper part of the technical compartment where the refrigerating circuit components are
located.
To access the electrical panel, remove the front panel of the unit.
The electrical connection must be made according to the wiring diagram attached to the unit and in compliance with local
and international regulations.
Make sure that the power supply line of the unit is sectioned upstream of it.
Make sure that the disconnecting device is padlocked or that a dedicated warning sign is applied to the operating handle.
Check that the power supply corresponds to the nominal data of the machine (voltage, phases, frequency) shown on the
wiring diagram and on the plate applied to the unit.
The power supply cables must be protected upstream against the effects of short circuits and overload by a suitable device
complying with the standards and laws in force.
The section of the cables must be commensurate with the calibration of the protection system upstream and must take into
account all the factors that could influence it (temperature, type of insulation, length, etc.).
The power supply must comply with the stated limits: otherwise the warranty will be immediately voided.
The flow switch must be connected following the indications provided in the wiring diagram. Never bridge the flow switch
connections in the terminal board. The warranty will no longer be considered valid if the flow switch connections have
been altered or incorrectly connected.
Performed all the ground connections required by the regulations and legislation in force.
Before starting any operation make sure that the power supply is disconnected.
The electric line and the safety devices external to the unit must be sized in such a way as to guarantee the correct supply
voltage at the maximum operating conditions shown in the unit's wiring diagram.
PR
FROST PROTECTION:
If open, the main switch excludes the power supply to any anti-freeze device in the unit. The main switch must only be
opened for cleaning, maintenance or repair of the machine or in case of stops for long periods. In these cases all necessary
precautions must be taken to avoid freezing of the exchanger liquid due to temperatures below 0°C.
Rev. C 09-2020
MTEC.3810.GB-C-1 Operation and maintenance manual serie WZA English
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