RTAD-SVX01F-E4
75
Maintenance
Weekly Maintenance
While unit is running in stable
conditions.
1 Check UCM-CLD pressure for
Evaporator, Condenser and Oil.
2 The subcooling should never be
less than 3°C (5.4°F) under any
circumstances.
CAUTION! A clear sightglass alone
does not mean that the system is
properly charged. Also check rest of
system operating conditions.
3 Inspect the entire system for
unusual conditions and inspect the
condenser coils for dirt and debris.
If the coils are dirty, refer to coil
cleaning.
Note: On Free-Cooling units, the
Free Cooling coil has to be checked
too.
Monthly Maintenance
1 Perform all weekly maintenance
procedures.
2 Record the system subcooling.
3 Record the system superheat.
4 Make any repairs necessary.
5 Clean the strainer after 2 hours of
operation.
Annual Maintenance
1 Perform all weekly and monthly
procedures.
2 Check oil sump oil level while unit
is off.
Note: Routine changing of the oil is
not required. Use an oil analysis to
determine the condition of the oil.
3 Have a qualified laboratory
perform a compressor oil analysis
to determine system moisture
content and acid level. This
analysis is a valuable diagnostic
tool.
4 Contact a qualified service
organization to leak test the chiller,
to check operating and safety
controls, and to inspect electrical
components for deficiencies.
5 Inspect all piping components for
leakage and damage. Clean out
any inline strainers.
6 Clean and repaint any areas that
show signs of corrosion.
7 Clean the condenser coils.
WARNING! Position all electrical
disconnects in the "Open" position
and lock them to prevent injury or
death due to electrical shock.
Note: On Free-Cooling units, the
Free Cooling coil has to be checked
too.
8 Check and tighten all electrical
connections as necessary.
Pump maintenance
Pumps motor bearings and
mechanical seals have a designed life
expectancy of 20000-25000 hours of
operation. For critical applications it
might be necessary to change the
components as a preventive measure.
General
Perform all maintenance procedures
and inspections at the
recommended intervals. This will
prolong the life of the chiller and
minimize the possibility of costly
failures. Record an operating history
for the unit, which will serve as a
valuable diagnostic tool for service
personnel. By observing trends in
operating conditions, an operator
can anticipate and prevent problem
situations before they occur. After
the unit has been operating for
approximately 30 minutes and the
system has stabilized, check the
operating conditions and complete
the procedures below:
