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General Description
7.8 Electric power supply and
control system
The control compartment contains and electronic card
with keyboard and a display for working parameters,
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 switch
Prevents the operation of the unit when the chilled fluid
is insufficient. It is advisable to install a flow switch, 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 customer,
at his own expense.
Fan speed regulator
The speed regulator of the fans is mounted as a stand-
ard 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 versions.
Wire-type remote control kit
The kit includes a remote control for wall mounting,
complete with 3m-long connecting cable, and installa-
tion 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 instruc-
tions.
Remote wall terminal
Makes it possible to check the unit through a remote
terminal, up to a maximum distance of 200 meters.
RS-485 serial card (for MODBUS or
LONWORK or BACNET )
A communication interface makes it possible to control
and manage the unit from a local station, with RS485
connection, up to a distance of 1,000m.
It is possible to obtain the remote control and the man-
agement, by inserting the control into the management
plant of the building.
Hydronic module
The Hydronic Module, to be installed on site at the
Customer’s expense, is a hydraulic package which
includes all the components required for the fluid dis-
tribution system. It has been designed for outdoor in-
stallation, on the roofing of the building, rather than
directly at the ground level.
The Hydronic Module is enclosed in its own case and
includes:
n
an inertial tank
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a single or double pump for standard head or high
head
n
the expansion tank
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a water filter installed near the suction of the pump
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a pressure gauge
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shutoff valves for filter maintenance purposes
n
a safety valve, calibrated at 3 bar
n
an automatic air relief valve
n
fill and drain valves
n
thermal insulation for piping and hydronic compo-
nents
n
a switchboard (protection class IP54) provided with
main disconnecting switch, contactors and fuses for
the pump and the electric heaters, if any
n
antifreeze electric heater (optional)
n
kit of antivibrating devices (optional) to be used if the
appliance is to be installed on the refrigerator
n
cascade start-up sequencer (up to 4 parallel units).
