Parameter Generation and Control 9354-4250, Installation And Operation Manual, Page: 31 / 90

PGC, Inc 500-1000 CFM Air Handler May 2006
Appendix A A-15
M
AINTENANCE
PGC
chambers are designed to be reliable and require minimal maintenance. If the Conditioner is
to be out of service for an extended period, it is advisable to clean the spray chamber interior to
remove contaminants that collected; refer to “Spray Chamber” in the Preventive Maintenance
Schedule table.
P
REVENTIVE
M
AINTENANCE
S
CHEDULE
Component
What to Check Periodicity
Blower Wheel The blower wheel should be checked periodically for
cleanliness. A dirty blower wheel may reduce airflow
drastically. If the wheel cannot be cleaned, the blower should
be replaced. Annually
Condenser,
Air-Cooled
Inspect and clean the outside coils.
Typical A/C condensers
require less frequent cleaning than PGC air cooled
condensers because they only operate part of the time.
Quarterly
Heaters Check resistance to ground; less than 50K Ω indicates a
possible heater failure.
Annually
Spray Chamber Drain and flush out the interior (including evaporator coil,
spray eliminator, walls and sump) to remove deposits.
Quarterly or as
needed
Spray Nozzles The spray nozzles should be checked periodically to make
sure they are free of foreign particles that might impair their
operation. The spray pattern may be observed by opening the
front access door. All spray jets should be working and
spraying uniformly. Quarterly or as
needed
UV Lamp and
Quartz Jacket The UV filter lamp and quartz jacket should be replaced
every 9,000 hours of operation. Annually
Particulate
Filter Inspect and/or replace particulate filter as needed. Different
applications will generate varying quantities of airborne
particulates. Different water sources will also supply varying
amounts of particulates. Due to this the service frequency for
the particulate filter can vary widely. Visually inspect the
filter frequently at first until an appropriate schedule can be
developed. Monthly (at
first) then as
needed.
Water RTD
Calibration RTD was calibrated at the factory. Re-calibration should not
be necessary. As needed
Air
Temperature/Rh
Calibration HygroClip™ must be re-calibrated. Annually, or
as needed
Spray nozzles
It is important to change the water periodically. All water contains some impurities, and the spray
water picks up anything in the air. During normal conditioner operation, some water vapor is lost