OPERATING INSTRUCTIONS
48
DRY AIR PURGE
In normal operation, the dryer towers will switch every 30 seconds. Each tower
purges with an audible exhaust. Do not plug or restrict the purge air exhausts.
If operating conditions change, different purge orifices may be required. If
orifices are replaced, they should be replaced in matched pairs.
The heat of absorption and the solenoid valves will cause the unit to become
warm. This is normal and does not indicate a malfunction. The temperature
rise is more pronounced in a dryer operating at a low flow rate.
During operation, there may be a faint fume from the solenoid valves. This is
caused by the AC voltage on the coil. It does not indicate a malfunction.
The highest ambient temperature at which a heatless dryer can be operated is
125°F (52°C). The maximum air temperature at the inlet which the instrument
should handle is 125°F (52°C).
Figure 3-3: Dry Air Purge System Components Location (5SCFM Unit)
Note: CSZ is continuously upgrading the components used in its equipment.
Consequently, the physical appearance of certain components may vary from that shown.
During humidity operation,
the dry air purge system
must be turned off.
mode for single set-point
operation.
SHOULD BE USED TO
SUPPLY THE DRY AIR
PURGE SYSTEM.
The Hose inside the dry air
purge package must be run
to a drain. Both oil and
water will be drained
through this line.
Do not expose the bowl or
sight glass to materials such
as carbon tetrachloride,
trichlorethylene, acetone,
paint thinner, or other
similar materials as they can
also cause a chemical
reaction with the plastic and
can cause it to rupture.
Valve-Solenoid,
Air Supply
to Chamber
Valve
Set at 150 SCFH
Hose
with Gauge Set at
80 PSIG (3.2
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