(© Aug, 2006)
Compact CWE Series Installation, Operation & Maintenance Manual
4-1
4.0
MAINTENANCE
4.1
Periodic General Maintenance
Systematic, periodic general maintenance of the
Compact CWE
unit is recommended for optimum
system performance. General maintenance should
include, but is not limited to the following: replacing
filters and humidifier cylinders, tightening electrical
connections, checking the water lines to ensure they
are free of debris, ensuring no air is in the water
line(s), cleaning the interior of the unit and inspecting
the unit’s components visually.
Use copies of the Periodic General Maintenance
Checklist in this manual (see Appendix A) to record
periodic general maintenance inspections. For
assistance, contact the SATS Product Support Group.
Ensure adherence to all safety statements while
performing any type of maintenance.
WARNING
Turn off power to the unit at the main power dis-
connect switch, unless you are performing tests
that require power. With power and controls en-
ergized, the unit could begin operating automati-
cally at any time.
Hazardous voltage will still be present inside the
electric box at the motor start protectors and at the
heater and humidifier circuit breakers even with the unit
turned off at the microprocessor contoller. To isolate the
unit for maintenance, turn off power at the main power
disconnect switch.
Always disconnect main power prior to performing any
service or repairs. To prevent personal injury, stay clear
of rotating components because automatic controls
may start them unexpectedly.
This unit employs high voltage equipment with
rotating components. Exercise extreme care to avoid
accidents and ensure proper operation.
WARNING
This equipment should be serviced and repaired
by a journeyman or a qualified refrigeration
technician only.
4.1.1
A/C Unit
4.1.1.1 Filter
The filter is usually the most neglected item in an air
conditioning system. To maintain efficient operation,
the filter should be checked at least monthly and
replaced as required.
NOTE
Conditions of spaces vary and filters should be
checked based on those conditions.
4.1.1.2 Fan
Periodic checks of the EC fan system should include
checking the fan motor mounts, housing and the
impeller wheel. Check that all mounts are secure and
impeller wheel is tightly mounted. The impeller blades
should be free of debris.
4.1.1.3 Drain Pan
To ensure proper drainage, inspect the drain pan
regularly. Make sure the drain pan outlets are always
free of debris and ensure the drain pan does not leak.
4.1.1.4 Coils
The coil(s) should be inspected semi-annually and
cleaned as required, following standard coil cleaning
practices. Using a brush, clean the coil fins of all
debris that will inhibit airflow. This can also be done
with compressed air or with a commercial coil cleaner.
Check for bent or damaged coil fins and repair as
necessary. Check all piping lines for signs of leaks.
4.1.1.5 Heat/Reheat
The heat/reheat equipment should be inspected semi-
annually to ensure it is operational. If you have electric
heat/reheat, inspect the heating elements to ensure
they are free of debris.
4.1.1.6 Humidifier
Because water conditions vary greatly, it is difficult to
establish intervals for changing the cylinder. A change
cylinder light (red) will illuminate on the humidifier
cabinet when the cylinder requires replacement.
Individual maintenance schedules must be determined
for each location, based upon periodic examination of
the humidifier.
4.1.1.7 Condensate Pump
The condensate pump should be inspected semi-
annually and cleaned. Ensure that the float stem
works freely. Wipe the float with a wet cloth and
detergent to remove dirt. Clean the bottom tank.
Check that the discharge line is open and water can
pass through it freely.
