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FROST PROTECTION
If opened, the main switch cuts the power off to any electric heater and antifreeze device supplied with the unit, including the
compressor crankcase heaters. The main switch should only be disconnected for cleaning, maintenance or unit reparation.
4.19 Electrical data
The electrical data reported below refer to the standard unit without accessories.
In all other cases refer to the data reported in the attached electrical wiring diagrams.
The line voltage fluctuations can not be more than ±10% of the nominal value, while the voltage unbalance between one phase
and another can not exceed 1%, according to EN60204. If those tolerances should not be respected, please contact our Company.
Power supply
Control board
Auxiliary circuit
Fans power supply
Line section
PE section
Electric data may change for updating without notice. It is therefore necessary to refer always to the wiring diagram present
in the units.
4.20 Electrical connections
The power supply must correspond to the electric nominal data (tension, phases, frequency) reported on the label in the front panel of the
unit. Power connections must be made in accordance to the wiring diagram enclosed with the unit and in accordance to the norms in force.
Power cable and line protection must be sized according to the specification reported on the wiring diagram enclosed with the unit.
Electric supply must be in the limits shown: in the opposite case warranty will terminate immediately. Before every operation
on the electric section, be sure that the electric supply is disconnected.
The unit can be correctly activated only if the connections of the dehumidification and ventilation remote contacts (example:
hygrostat, microprocessor control, etc) will be made. In this respect, please, follow very strictly what is reported in the wiring
diagram.
FAN SPEED: The unit is provided of a 3-speed fan which is regularly connected to the medium speed. In case it's necessary
to change the speed, it's sufficient to change the connection in the block located in the electrical board.
FORCING THE UNIT IN ONLY VENTILATION: in the terminal board, it's available a contact which allow the unit to work in only
ventilation. Closing this contact, only the fan works. The dehumidification mode is not in function.
The units must be connected to an ambient Hygrostat/Thermostat. Failure to use one of the two components prevents proper
operation in different modes.
Model
V/~/Hz
V/~/Hz
V/~/Hz
V/~/Hz
mm
2
mm
2
27
25
230/1/50
24V
230/1/50
230/1/50
1,5
1,5
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