(Mar, 2012)
CeilAiR OHS Series Installation, Operation & Maintenance Manual
Air Technology Systems, Inc.
4-1
4.0 Maintenance
4.1 Periodic General Maintenance
Systematic, periodic general maintenance of the
CeilAiR unit is recommended for optimum system
performance. General maintenance should include,
but is not limited to, the following: replacing fi lters and
humidifi er cylinders, tightening electrical connections,
checking the condensate line to ensure it is free of
debris, cleaning the interior of the unit, inspecting
the units’ components visually, checking belt tension,
checking level of refrigerant and ensuring no mois-
ture in the refrigerant.
Use copies of the Periodic General Maintenance
Checklist in this manual (see Appendix A) to record
periodic general maintenance inspections. For as-
sistance, contact the SATS Product Support Group.
Ensure to adhere to all safety statements while
performing any type of maintenance.
WARNING
This equipment should be serviced and re-
paired by a journeyman or a qualifi ed refrigera-
tion technician only.
WARNING
Turn off power to unit at the service disconnect
switch unless you are performing tests that
require power. With power and controls ener-
gized, unit could begin operating automatically
at any time.
Hazardous voltage will still be present at evapo-
rator, condenser, heat/reheat and humidifi er,
even with the unit turned off at the control panel.
To isolate unit for maintenance, turn off power
at non-fused service switch.
Always disconnect main power prior to per-
forming any service or repairs. To prevent per-
sonal injury, stay clear of rotating components
because automatic controls may start them
unexpectedly.
WARNING
This unit employs high voltage equipment with
rotating components. Exercise extreme care to
avoid accidents and ensure proper operation.
WARNING
Phosgene, a deadly, poisonous gas, is gen-
erated when refrigerant is exposed to fl ame.
Always ensure adequate ventilation during
refrigeration repairs.
Always recover all refrigerant prior to any
system repairs, failure to do so may result in
system over pressurization and rupture.
4.1.1 Precision A/C Unit
4.1.1.1 Filter
The fi lter is usually the most neglected item in an air
conditioning system. To maintain effi cient operation,
the fi lter should be checked at least monthly and
replaced as required.
NOTE
Conditions of spaces vary and fi lters should be
checked based on those conditions.
4.1.1.2 Blower
The blower motor is provided with permanently
lubricated bearings and should not require lubrication
for the lifetime of the equipment. Periodic checks of
the blower system should include checking the wir-
ing, blower motor mounts, housing bolts and blower
wheel. Ensure all electrical connections are tight.
Check that all mounts are secure and the blower
wheel is tightly mounted on the shaft and does not
rub against the fan housing. The blower vanes should
be kept free of debris.
4.1.1.3 Coils
The coil(s) should be inspected semi-annually and
cleaned as required following standard coil cleaning
practices. Using a brush, clean fl uid coil fi ns of all de-
bris that will inhibit airfl ow. This can also be done with
compressed air or with a commercial coil cleaner.
Check for bent or damaged coil fi ns and repair as
necessary. Check all refrigerant lines and capillaries
for vibration isolation and support if necessary. Check
all piping for signs of leaks.
Inspect electric heating elements to ensure they are
free of debris semiannually.
4.1.1.4 Drain Pan
To assure proper drainage, inspect the drain pan
regularly. Make sure the drain pan outlet is always
free of debris and ensure drain pan does not leak.