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SECTION 5 START UP AND SHUTDOWN PROCEDURES
STARTUP
BEFORE STARTING THIS DRYER, FOLLOW THE INSTALLATION INSTRUCTIONS AND PROCEDURES
COMPLETELY.
SERIOUS PERSONAL INJURY CAN RESULT IF INSTRUCTIONS ARE NOT CAREFULLY AND COMPLETELY
FOLLOWED.
DO NOT REMOVE, REPAIR, OR REPLACE ANY ITEM ON THE DRYER WHILE THE DRYER IS UNDER
PRESSURE.
INITIAL START-UPS
1. Confirm that all piping and electrical connections are proper.
2. If a bypass is installed around the dryer, close the inlet and outlet isolation valves. Open the bypass valve.
3. With No Pressure or Airflow on the dryer, turn the on / off switch to AUTO. In auto, the dryer will remain off until
the pressure switch senses an increase in pressure. In manual, the dryer will run with no air pressure present. Dryers
are shipped in the "AUTO" mode.
4. VSS Monitor
I.
Monitor display should read "Start Mode"
II.
Turn dryer ON
5. With valves in position #2, SLOWLY pressurize the airside of the system by opening the inlet valve to the dryer.
As pressure increases, the dryer will turn on and begin to run.
Compressor will now increase speed to the Start Frequency. Monitor display should read "Pressure Mode"
Compressor speed will now vary with the load. If the load is small enough the compressor will slow to the
preset minimum and the Hot Gas Valve will be energized. Monitor display should read "Hot Gas Mode".
6. When the dryer is under system pressure, slowly open the outlet isolation valve and close the bypass valve.
7. The system is now "on line" and should operate normally. Monitor the dryer to ensure that it is operating within the
proper parameters. Dryer should maintain between 33 and 35 degree dewpoint within 1 hour of startup.
SHUTDOWN
1. Isolate dryer by opening bypass valve and closing the inlet and outlet isolation valves.
2. Remove pressure from dryer by pushing the DRAIN TEST button on the control panel.
3. After dryer is depressurized, turn the On/ Off switch to the off position de-energizing the unit.
(This procedure should be followed on initial startup and after periods of extended shutdown)
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