INSTALLATION
Wall Mounted 0121…0661
16 (22)
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 15-05-2000 EN
ELECTRICAL CONNECTIONS
Correct and accurate electrical connections, carried out in compliance with local regulations, are
extremely important for the prevention of accidents and for ensuring long, trouble-free operations.
ACCESS TO THE ELECTRICAL PANELS AND PRELIMINARY CHECKS
Before working on the electrical parts of the unit, make sure that there is no power supply to the
unit and that the switch on the electrical panel is off (in the “O” position)
Check that the mains voltage corresponds to the nominal data of the unit(voltage, phases, frequency) shown on the
electrical panel.
Power supply voltage must be within -10% e +6% the nominal value. In tri-phase units the difference between the
phases must be less than 2%: unit operation with power supplies outside these limits may invalidate the guarentee.
Units with a three-phase power supply of 400 V need a neutral cable.
INSTALLING THE POWER SUPPLY CABLE
- 0121-0331 models (fig. 16.a.):
depending on the requirements of the installation, the power
and command circuit cables can enter the unit in one of three
locations:
a. from the rear, through the back of the unit (point A); if the
unit is connected to the inside of the air conditioned
environment;
b. from the side (point B) for external connections;
c. from below (point C).
- 0551-0661 models (fig. 16.b.):
insert the power cables through the provided holes at the rear
of the unit. The cables can be inserted directly to the power
supply using the sheath.
The three holes on the right are for the installation of the power
cables; the three holes on the left permit the installation of the
signal cables to be connected to the circuit mP20 or the q.e.
terminal block.
The table “RECOMMENDED POWER SUPPLY CABLE
SECTIONS AND LINE FUSES” contains the recommended
sections for the power supply and the size of fuses to mount
before the mains switch.
A
B
C
Fig. 16.a
Power
cables
Signal
cables
REAR OF THE UNIT
Fig. 16.b
IMPORTANT WARNING
Seperate the signal cables from the power cables by using different routes (where possible) or by grouping the two
sets of cables seperately. Make sure that the power supply and auxiliary control cables are as far as possible from
electric components. After opening the pre-drilled holes on the rear of the unit, protect the cable passages with
avoid contact with sharp surfaces.
(30 páginas)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentários a estes Manuais