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06617645-02
26
HYDRAULIC CONNECTIONS
Unit water pipe-work must be installed in accordance with national and local regulations. Pipes can be steel,
galvanized steel, copper or PVC. Pipes have to be designed depending on the nominal water flow and the
hydraulic pressure drops of the system. All pipes must be insulated with closed-cell material of adequate
thickness. The chiller must be connected to the pipework using flexible joints. Piping should include:
• Temperature and pressure gauges for maintenance or servicing operations.
• Manual shut-off valves to separate the unit from the hydraulic circuit.
• Metallic supply water filter to be sited at the inlet pipe, with a mesh not larger than 1 mm.
• Vent valves, expansion tank with water filling, discharge valve.
The water inlet must correspond with the connection labelled ”USER WATER INLET”, otherwise the
evaporator may freeze.
You must fit a metallic filter with a mesh not larger than 1 mm at the ‘USER WATER INLET’
connection. If the flow switch is altered or the water filter is not fitted, the warranty will be
invalidated. All units are supplied with flow switch, on ‘K’ versions it is factory installed, on standard
versions it is supplied loose. The flow switch MUST be installed on the water outlet pipe. Please refer
to the wiring diagram for the flow switch electrical connections
A Water tank F Water strainer
B Flexible connection G Water pump
C Ball shut-off valve H Expansion vessel
D Vent valve I Safety valve
E System filling group
LAC
Standard
LAC / K