RG66001652_REV.02
33
LCW - LCR
Generalities
To guarantee a constantly satisfactory performance over time, it is advisable to carry out routine
maintenance and checks as described below.
Operations
Frequency
•
Check the efficiency of all the control and safety devices
Once a year
•
Check the terminals on the electric control board and compressor terminal boards
to ensure that they are securely tightened. The movable and fixed contacts of the
circuit breakers must be periodically cleaned and replaced whenever they show
signs of deterioration.
Once a year
•
Check the refrigerant level by means of the liquid level indicator
Every 6 months
•
Check the oil levels through the windows provided on the compressor crankcases
Every 6 months
•
Check the water circuit for leaks
Every 6 months
•
If the unit is to remain out of service for a long time, drain the water from the pipes
and heat exchanger. This is indispensable if during the period of quiescence the
ambient temperature is expected to fall below the freezing point of the fluid used
Every 6 months
•
Check whether the water in the circuit needs to be replenished.
Every 6 months
•
Check the efficiency of the flow switch or differential pressure switch
Every 6 months
•
Clean the metal mesh filters mounted externally on the water pipes.
First start-up
•
Check the humidity indicator (green=dry, yellow=humid) on the liquid level
indicator; if the indicator is not green as shown on the indicator sticker, replace the
filter
Every 6 months
Repairing the Cooling Circuit
Warning: while performing repairs on the cooling circuit or maintenance work on
the compressors, make sure the circuit is left open for as little time as possible.
Even if briefly exposed to air, ester oils tend to absorb large amounts of humidity,
which results in the formation of weak acids.
If the cooling circuit has undergone any repairs, the following operations must be carried out:
-
tightness test;
-
emptying and drying of the cooling circuit;
-
charging with refrigerant.
If the system has to be drained, always recover the refrigerant present in the circuit using
suitable equipment; the refrigerant should be handled exclusively in the liquid phase.
