Electrical Power Supply And Control System; Accessories - comatec AQWL Installations- Und Wartungshandbuch

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 protection 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 fastening 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 standard 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.
7 - Product Description (continued)
Wire-type remote control kit
The kit includes a remote control for wall mounting, complete with
3m-long connecting cable, and installation manual and a transformer.
For longer distances (i.e. up to 50m) you can use a multipolar cable
of minimum section (0.25mm). Conductors should be connected
directly and according to the diagram with accompanies the
installation instructions.
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 1000 m.
It is possible to obtain the remote control and the management, by
inserting the control into the management plant of the building.
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