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General Description
VLC refrigeration diagram
Components:
1)
Compressor
2)
Air heat exchanger
3)
Ball cock
Safety and control devices:
A)
HP pressure switch
B)
LP pressure switch
C)
HP transducer
D)
LP transducer
E)
Differential pressure switch
F)
Air temperature sensor
7.8 Electric power supply and
control system
The control compartment contains and electronic
card with keyboard and a display for working para-
meters, alarms, if any, and operating blocks.
It is complete with remote control switches and pro-
tection fuses for the motors of compressors, fans and
pumps.
7.9 Accessories
List of available accessories, provided separately, to
be mounted on site by the installer:
Water flow meter
Prevents the operation of the unit when the chilled flu-
id is insufficient. It is advisable to install a flow meter,
to ensure the correct operation of the unit.
Water filter
Filter to be mounted on the suction side of the water
heat exchanger.
Antivibrating supports (AVM)
Isolating spring supports, equipped with bolts for fas-
tening to the base. They are supplied separated from
the unit and must be mounted on site by the cus-
tomer, at his own expense.
Fan speed regulator
The speed regulator of the fans is mounted as a stan-
dard accessory for the Extra Low Noise units, and is
an optional accessory for the Standard and Low
Noise units. The fan speed is controlled in order to
work at a low room temperature, and allows the unit
to work down to a room temperature of –18°C.
The control can be of the pressostatic step type, with
temperature correction, or of continuous type (under
pressure), with electronic regulator. The regulator is
of electronic type only for the Extra Low Noise ver-
sions.
Wire-type remote control kit
The kit includes a remote control for wall mounting,
complete with 3m-long connecting cable, and instal-
lation manual and a transformer.
For longer distances (i.e. up to 50m) you can use a
multipolar cable of minimum section (0.25mm). Con-
ductors should be connected directly and according
to the diagram with accompanies the installation in-
structions.
Remote wall terminal
Makes it possible to check the unit through a remote
terminal, up to a maximum distance of 200 meters.
Manuale VLS-VLH1 17-06-2005 9:05 Pagina 28
