Page 29
English
General Description
RS 485 MODBUS serial card
A communication interface makes it possible to con-
trol 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
management, by inserting the control into the man-
agement 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:
h
an inertial tank
h
a single or double pump for standard head or
high head
h
the expansion tank
h
a water filter installed near the suction of the pump
h
a pressure gauge
h
shutoff valves for filter maintenance purposes
h
a safety valve, calibrated at 3 bar
h
an automatic air relief valve
h
fill and drain valves
h
thermal insulation for piping and hydronic compo-
nents
h
a switchboard (protection class IP54) provided
with main disconnecting switch, contactors and
fuses for the pump and the electric heaters, if any
h
antifreeze electric heater (optional)
h
kit of antivibrating devices (optional) to be used if
the appliance is to be installed on the refrigerator
h
cascade start-up sequencer (up to 4 parallel units).
Manuale VLS-VLH1 17-06-2005 9:05 Pagina 29
