Parameter Generation and Control 9354-4250, Инструкция по установке и эксплуатации

Страница: 30 / 90

PGC, Inc 500-1000 CFM Air Handler May 2006
Appendix A A-14
R
H
C
ONTROL
1.) The humidity cannot be controlled if the water temperature or air temperature is out
of control; refer to the respective troubleshooting section.
2.) Verify that the air flow through the mist eliminator is unrestricted; restrictions could
permit water droplets to bypass the mist eliminator. If droplets contact the heater, the
droplets will flash into steam and adversely affect the humidity control.
3.) Common Sense. Refer to the air/water/Rh graph supplied. Verify that the measured
air and water temperatures will yield the Rh that is measured. Any gross errors may
help to indicate the source of the problem.
a.
Verify the chamber air temperature and/or relative humidity using an
independent sensor. This can be a rough verification just to make sure the air
temperature and Rh measurements are close.
b. Verify the water spray temperature using an independent sensor placed in the
water sump. This can be a rough verification just to make sure the water
temperature measurement is close.
c. If the water spray temperature is considerably colder than should be required:
i. If the ambient dew point is greater than the dew point in the conditioned
space; check for excessive chamber or duct work leakage.
d. If the water spray temperature is considerably warmer than should be required:
i. If the ambient dew point is less than the dew point in the conditioned
space; check for excessive chamber or duct work leakage.