Daikin ZUWV - Page 43

SINGLE SCREW CHILLERS IMM
Engineered for Flexibility and Performance 39
lubricant oil
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Obvious black
suspended
substance,
floc and oil
sludge,
acidity>0.04
(mg KOH/g),
water
content >400
ppm
Heat exchanger
Cleaning
tubes:
physical or
Chemical
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Heat transfer
temperature
difference
more than
3 °C
Water
pressure
drop(see
chiller specs)
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To check
whether the
rubber
gaskets are
damaged if
the pressure
drop value is
lower than
60% Rating
values
Valves
Expansion
valve (cannot
control the
liquid supply
volume and
liquid level)
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Turn up the
valve and the
liquid level of
condenser
does not
decline
significantly
and the low
pressure has
no upward
tendency.