MAINTENANCE WITH Q&A
Page 5-3
The EZT-570S controller
provides maintenance
alerts based on the use
of the chamber. See EZT-
570S manual for further
information.
NOTE
Mineral Oil (3GS) does
not mix with the P.O.E.
oils. Therefore, any
oil that is added to the
compressors must be
P.O.E. This oil attracts
moisture much worse
than mineral oil. Care
should be taken to keep
the oil enclosed at all
times.
CAUTION
!
2. Fluid Levels (If Applicable)
Check the fl uid levels daily.
3. Gas Monitor (Optional Equipment) Water Filter
If the chamber is equipped with a Gas Monitor, check the water accumulation
levels daily. Empty when full as required. Failure to follow this procedure will
result in damage to the Gas Monitor and is NOT covered under warranty.
WEEKLY
4. R-404A Charge (If Applicable)
Check the sightglass for bubbles every 7 to 14 days. If bubbles are present, the
unit is low on refrigerant. Call a qualifi ed service technician to add refrigerant.
5. R-410A Charge (If Applicable)
Check the sightglass for bubbles every 7 to 14 days. If bubbles are present,
The unit is low on refrigerant. Call a qualifi ed service technician to add
refrigerant.
6. 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.
7. System 2 (R-23) 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.
8. Compressor Oil Level
There is an oil level indicator on scrolls and semi-hermetic compressors. The
compressors are factory charged and the level should be checked periodically.
Polyol Ester Oil (P.O.E.) is used in the R-404A, R-410A and R-508B/R-23
compressors. The brand name is Mobil EAL22. This oil was developed for the
use with the new refrigerants.
9. Humidity Demineralizer Filter (Optional Equipment)
The demineralizer fi lter should be replaced when the color change reaches 3"
from the bottom of the fi lter. Damage will occur if the fi lter is not replaced when
the color changes from dark blue to orange brown.
MONTHLY
10. 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 effi ciency and premature failure.
Failure to empty the
Gas Monitor Water
Filter will damage the
Gas Monitor and is NOT
covered under warranty.
WARNING
!
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