MAINTENANCE WITH Q&A
Page 5-2
3. System 2 (R-508B) Stand-By Pressure (If Applicable)
Check the pressure in the controller prior to starting the conditioning system. A
discharge pressure reading lower than the standby pressure on the data plate
could indicate a leak in the system. DO NOT START. To check the stand-by
pressure, power off the unit. Let the unit stand for 24 hours (this will allow for
full equalization). Check pressure reading on the gauges.
4. Humidity Demineralizer Filter (Optional Equipment)
The demineralizer ! lter should be replaced when the color change reaches 3"
from the bottom of the ! lter. Damage will occur if the ! lter is not replaced when
the color changes from dark blue to orange brown.
5. Air-Cooled Condenser (If Applicable)
Should be cleaned monthly with a vacuum. This period may be extended if
operating conditions warrant. A dirty, clogged condenser can lead to
excessive head pressure in the R-404A/R-410A system and can result in
a loss of system ef! ciency and premature failure.
6. Electrical Panel
Check for components and wires which may vibrate loose during operation.
Check for signs of contactor or relay arcing. Check to see that power and
ground connections remain secure.
7. Tubing Abrasion
Check for evidence of friction wear on all refrigeration lines. Particular care
should be taken in inspecting capillary tubes to pressure gauges/transducers.
Check lines any time the system is shut down.
8. Humidity Sensor (Optional Equipment)
Clean tip of sensor with alcohol. Dry sensor in chamber at 250.0°F/121.1°C for
10 minutes after cleaning.
9. Reservoir
(Optional Equipment)
The reservoir should be cleaned monthly to eliminate debris or ! lm. Open up the
drain valve, # ush with clean water and wipe down the inside of the tank using a
clean rag. Re! ll water to designated level.
YEARLY
10. Chamber Controller Calibration/Veri! cation
Calibrate/Verify the chamber controller settings if all instruments in your facility
are periodically calibrated to one device (metrology), or if a measurement
system component fails. The calibration/veri! cation procedure is located in the
Controller Manual which accompanied your unit.
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