Parameter Generation and Control 9354-4250, Installation And Operation Manual, Page: 32 / 90

PGC, Inc 500-1000 CFM Air Handler May 2006
Appendix A A-16
and the water is replaced by the supply. Over time, the concentration of all these impurities
increases and deposit out on the coils and other parts of the chamber. Periodic draining and
flushing with clear water will significantly reduce such accumulations.
The spray nozzles should be checked periodically to ensure they are free of foreign particles that
might impair their operation. The spray pattern may be observed by opening the access door. All
spray jets should be working and spraying uniformly.
Particulate Filter
Proper filtration by the UV lamp requires that the water be free of
particulates that block the UV light from passing through the water.
The particulate bag filter is located in the sump and will trap
particulates that are 5 microns and larger. This filter bag must be
replaced periodically; the frequency of replacing this bag filter
depends mostly upon the process in the test chamber and upon the
environment in which the air handler is used. When starting a new
process, inspect the filter frequently in order to determine the
replacement frequency.
Replacement Instructions.
1. Turn the air handler off.
Figure A-2 – Spray Chamber
Finned
Evaporator
Air Heaters Spray Nozzles
Particulate Filter
Connection
Spray Header
Figure A-7 – Particulate Filter