4. Operating
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Start-Up
After all installation procedures are performed, drain water from the system prior to dryer start up.
This will prevent saturation of the desiccant bed and improve performance of the dryer.
1. The inlet shutoff valve open, the outlet shutoff valve & bypass valve close.
2. Before to turning the dryer control panel switch ON, pressurize the dryer by slowly opening the
Inlet shutoff of the dryer.
3. When both tower pressure gauges indicate line pressure, open the outlet shutoff valve.
Compressed air now flows through the pre-filter, the dryer and the after filter.
4. Switch the control panel power switch ON. Five seconds after activating the dryer control
circuit, one tower will depressurize to atmospheric pressure. Regenerating purge air will then flow
through the regenerating tower.
5. Set the purge adjustment valve to 45 psig (3.1 barg). The purge pressure can be properly set
only the purge exhaust valve is open and the regenerating tower is at atmospheric pressure.
(See Appendix Purge Air Calibration Chart)
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Stop
To stop the dryer, place the switch in off.
During maintenance of dryer, disconnect main electrical source.
10
Caution!
Sudden pressurization of the dryer will cause a rush of high velocity air into the
desiccant bed. This will hasten the need for after filter element and desiccant
replacement and may cause premature failure of valves due to desiccant fines.
Must keep the purge pressure : 3.0~3.5barg.
Caution!
Do not operate the air dryer before purge air exhaust.
Damage caused by this is not covered by the product warranty.
