VARISTAR LHX 20
Commissioning
Cooling module 60714-050
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12
R2.1, May 10, 2012
5.3 Connect to the cooling water source
Attention!
Connection to the cooling water supply may only be carried out by a
refrigeration engineer or suitably trained plumber.
Notes on the water connection:
The cooling infrastructure to which the unit is connected (the external water
loop) must be appropriately dimensioned by the system designer, taking into
consideration the available pump pressure and type, the nominal pipe diame-
ters and the pressure loss expected in the load circuit (the cooling module).
The water pipes used may be either flexible or rigid types. The behaviour of the
materials used in the module with those of the external loop should be
observed for any adverse reaction in order to avoid corrosion damage.
During construction of the external pipe circuitry care should be taken to pre-
vent contaminants entering the system; the pipes should be flushed clean prior
to connection to the cooling module.
It is recommended that isolation and drainage valves be provided for each cab-
inet or cooling module, together with a central water filter and air separator.
The control valve in the water loop of the cooling module is a three-way valve
that is supplied configured as a straight-way (two-way) valve; the bypass is
sealed closed. The advantage of this solution is that only the specific volume of
water required for cooling flows through the air/water heat exchanger.
The circulator pump can thus be operated with constant pressure and variable
water flow.
For cooling systems in which the three-way functionality is required, the
two-way valve can be suitably modified by Schroff service personnel.
