91
4.8.3 Recommended water cooler mode design
Fig. 69 Example of connecting a water cooler
4.8.4. Recommended DX cooler mode design
Fig. No. 70 Connection of DX Cooling coils
DX cooler
4.8.5 Operating recommendations for water exchangers
The state of contamination of the water exchanger lamellas
should be checked at least every 12 months, but it is recom-
mended when replacing the lters.
When the exchanger is contaminated, it should be cleaned
with a vacuum cleaner with a soft suction nozzle on the
side of air inlet or blown through with compressed air on
the side of air outlet. It is also possible to wash it with warm
water and cleaning agent that does not cause aluminium
corrosion. When lling the installation, it should be remem-
bered to bleed the exchanger at all times.
Every 12 months the condensers should be checked for cle-
anliness of the condenser, the drip tray, and the condensate
drainability and trap condition. If the drop separator is so-
iled, wash it with warm water with washing agents.
Before the winter period, if the medium is chilled water and
the exchanger will not work, drain the water if the exchan-
ger is exposed to direct cold air ow.
4.8.6 Operating recommendations for exchangers for direct evap-
oration
Operation analogous to a water cooler, with the following
proviso: washing the cooler with direct evaporation of DX
with hot water requires prior suction of the refrigerant from
the cooling system. Otherwise, gas pressure may increase,
which may damage the cooling installation.
In case of marks of sedimentation in the drip tray, wash it
with water with the addition of a descaling agent. Rinse the
condenser drain tray with warm water and detergent, and
even with a decalcication agent if required.
4.8.7 Pomp group
In terms of delivery, it is possible to supply a pump group,
to supply the heating coil, as a replace-ment option for only
three-way valves with actuator
The technical documentation OMM of the pump group is
added together with the device in a separate document.
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