PGC, Inc 500-1000 CFM Air Handler May 2006
Appendix A A-1
Appendix A
System Construction ................................................................................................................... 2
Theory of Operation.................................................................................................................... 3
Description of Operation............................................................................................................. 4
Measurement of Test Chamber Conditions ............................................................................ 4
Air Flow.................................................................................................................................. 4
Water Flow ............................................................................................................................. 5
Temperature Controls ............................................................................................................. 5
Description of Circuitry .............................................................................................................. 7
Safety Devices............................................................................................................................. 9
Troubleshooting ........................................................................................................................ 12
Operating Range of the System. ........................................................................................... 12
Water Temperature ...............................................................................................................12
Air Temperature.................................................................................................................... 13
Water Level .......................................................................................................................... 13
Rh Control ............................................................................................................................ 14
Maintenance .............................................................................................................................. 15
Preventive Maintenance Schedule........................................................................................ 15
Automatic Damper Motor Adjustments ............................................................................... 18
Calibration ............................................................................................................................ 18
Calibration ............................................................................................................................ 19
Calibration, Air/Rh ............................................................................................................... 19
Water Temperature Calibration ............................................................................................ 22
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