A
PPLICATION
GUIDELINES
36
FRCC.PC.007.B5.02
S
PECIFIC
APPLICATION
RECOMMENDATIONS
Apart from residual moisture in the system after
commissioning, water could also enter the re-
frigeration circuit during operation. Water in the
system shall always be avoided. Not only because
it can shortly lead to electrical failure, sludge in
sump and corrosion but in particular because it
can cause serious safety risks.
Common causes for water leaks are corrosion and
freezing.
Corrosion: Materials in the system shall be compli-
ant with water and protected against corrosion.
Freezing: When water freezes into ice its volume
expands which can damage heat exchanger walls
and cause leaks. During off periods water inside
heat exchangers could start freezing when ambi-
ent temperature is lower than 0°C. During on pe-
riods ice banking could occur when the circuit is
running continuously at too low load. Both situa-
tions should be avoided by connecting a pressure
and thermostat switch in the safety line.
Water utilizing systems