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7. A filter or device that can remove particles from the
fluid. The use of a filter extends the life of the
evaporator and pump and helps to keep the water
system in a better condition. The water filter must
be installed as close as possible to the chiller, as
in Figs. 5 and 6. If the water filter is installed in
another part of the water system, the Installer has to
guarantee the cleaning of the water pipes between
the water filter and the evaporator.
Recommended maximum opening for strainer mesh is:
0,87 mm (DX S&T)
1/1,2 mm (BPHE)
1,2 (Flooded)
8. Evaporator has an electrical resistance with a
thermostat that ensures protection against water
freezing at ambient temperatures as low as –25°C.
All the other water piping/devices outside the unit
must therefore be protected against freezing.
9. The heat recovery device must be emptied of water
during the winter season, unless an ethylene glycol
mixture in appropriate percentage is added to the
water circuit.
10. If case of unit substitution, the entire water system
must be emptied and cleaned before the new unit is
installed. Regular tests and proper chemical
treatment of water are recommended before starting
up the new unit.
11. In the event that glycol is added to the water system
as anti-freeze protection, pay attention to the fact
that suction pressure will be lower, the unit’s
performance will be lower and water pressure drops
will be greater. All unit-protection systems, such as
anti-freeze, and low-pressure protection will need to
be readjusted.
12. Before insulating water piping, check that there are
no leaks.
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