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DME012-RX - DME080-RX
4.
Operating the equipment
4.1 Overview of Controls
The facia of the dryer consists of indicators only as follows:
Power “ON” Indicator
ECO (DDS) Indicator
Column A Pressure Gauge
Column B Pressure Gauge
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4.2 Starting the equipment
Warning
Start-up should be undertaken by a domnick hunter trained, qualified and approved service engineer.
1.
Ensure that the isolation valves on the inlet and the outlet of the dryer are closed.
2.
Connect the electrical supply to the dryer and verify that the Power On indicator is illuminated.
3.
Slowly open the isolation valve on the inlet of the dryer. Verify that there are no leaks.
4.
Check that the system pressure relief valve is closed.
5.
Test the condensate drains of the filters and verify that they are discharging correctly into a suitable collection vessel.
6.
When the dryer is pressurised to full system pressure, slowly open the outlet isolation valve.
If a bypass line has been fitted, close the bypass valve.
7.
Verify that the column pressure gauges are cycling between zero and full system pressure every three minutes.
The dryer is fully automatic and requires no user intervention until shut-down.
Dewpoint Dependent Switching (DDS)
If the dryer is producing air at a better dewpoint than specified the DDS system will hold the dryer at a point just before the changeover
occurs. The green “ECO” LED will illuminate and both pressure gauges will read full system pressure.
The dryer will resume normal operation the instant the DDS system monitors a fall in dewpoint to the specified level.
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4.3
Stopping the equipment
1.
Close the isolation valve on the outlet followed by the isolation valve at the inlet.
If a bypass line has been fitted, simultaneously open the bypass valve.
2.
De-pressurise the dryer by venting through the drain ball valve on the outlet dust filter.
Note:
The drain valve should be opened gradually.
3.
Disconnect the electrical supply to the dryer.
