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IOM_WPVBZ HE-WPVZ HE_401-1201-4002_208110_200901_EN
PACKAGED COMPACT VERTICAL
– WATER / AIR
WPVBZ HE / WPVZ HE
SAFETY PRECAUTIONS
Before starting any installation, service or maintenance operation, turn off the main power switch in
order to avoid electrical shock that may cause personal damages.
In case of folding electrical panels, before folding them up in order to access to the interior of the machine, it is
MANDATORY to disconnect the power supply hose from the electrical voltage, THE LINE MUST ALWAYS BE
FREE OF VOLTAGE for this operation.
It is absolutely prohibited to realize any operation on parts that are electrically powered on. The protection class
of the opened equipment is IP00!
The absence of voltage must be confirmed by a minimum two poles voltage tester.
DANGER
Do not touch or adjust the safety devices inside any unit of the system. For repairs use only original spare parts
and mount them properly in the same position where old parts were placed.
The installation and maintenance of air conditioning equipment may be dangerous because the system is under
pressure, some of its elements have high temperatures and include electrical components.
Do not install the unit in an explosive atmosphere.
The units equipped with water-air, water-water, or refrigerant-water heat exchangers shall be protected
properly against damage caused by frost. A proper protection is obtained by adding the necessary anti-
frost liquid so that the freezing temperature becomes minimum -2°C (6% when using Ethylene Glycol).
Moreover when the ambient temperature in any part of the installation may reach values lower than 5°C
it is COMPULSORY to protect the unit and the whole installation with additional measures such as
heating tubes, draining the unit and the whole installation for water (when the unit is not under
operation) or adding more anti-frost liquid so that the freezing point always will be lower than the
minimum temperature that the ambient air may reach.
Even after disconnecting the main voltage, life-threatening charges may appear between the protective ground
“PE” and the main connection.
When the motor runs independently due to air flowing through or if it continues to run down after being turned off,
dangerous voltages of over 50 V can arise on the internal connections of the motor through operation of the
generator.
When there are EC motors or motors with variable speed control, the protective earth is conducting high discharge
currents (depending on the switching frequency, current source voltage and motor capacity). Grounding in
compliance with EN specifications shall therefore be observe even for testing and trial conditions (EN 50 178, Art.
5.2.11). Without grounding, dangerous voltages can be present on the motor housing.
Because of the use of capacitors, danger of death exists even after switching off the device in case of direct
contact with conductive parts or with parts that carry voltage due to fault condition. It is only allowed remove or
open the housing of the controller when the power supply cable is disconnected and after a waiting time of 3
minutes.
The warranty of the unit will not respond to the damages caused by frozen water.
WARNING!
