SRL Service Manual
Revision 00
July 2007
Page 29 of 56
6. Start-up
Before starting up the dryer, make sure that the air inlet and outlet isolation valves are closed, and the
bypass valve is open. This will ensure there is no air flow through the dryer.
For water cooled units do not open the isolation valves to allow cooling water to flow of
water through the condenser until immediately before start up, otherwise, the HP (high
pressure) alarm may occur. In this case, reset the alarm on the control panel, wait few
minutes and restart the dryer. You may have to restart the unit repeatedly to get this
alarm to disappear.
Turn the ON/OFF switch to the “I/On” position.
The Power LED (4.2.4.1) comes on (yellow).
Press the ON/OFF Button (4.2.4.2).
The Power LED light turns from yellow to green, the Refrigerant Compressor (3.2.2) starts and
the digital display shows the B1 temperature reading (dew point temperature).
On three-phase units if the phases are inverted, the compressor and the fan will rotate
in the wrong direction. In this case:
a) The scroll compressor is not displacing any refrigerant. It will be noisy
and the dryer will vibrate. Since the dryer is not producing any cooling
effect, after 15 minutes, the “Hd” (High dew point) warning will come on.
b) The fan is moving air in the wrong direction. This can be verified by
comparing the air flow to the air flow indicated in the User Guide and on
the name plate inside the electrical panel.
Shut down the dryer, isolate the power supply, and swap the two phases.
Let the dryer operate
without air flow
until the dew point drops to operating levels and the dryer
begins to cycle.
Slowly open the inlet isolation valve to pressurise the dryer, then open slowly the outlet isolation valve.
Close the bypass valve.
The dryer is now on line and operating.
