36
HDK-MT350_EN_06
Disconnect voltage supply
► Switch off the dryer by setting the ON/OFF switch to position 0.
If work is to be carried out on the electrical system
► Depressurise and shut down the dryer, following the instructions in the above
chapter.
Risk of injury due to voltage-carrying parts!
The electrical supply cable and external power lines are live even after the
dryer is switched off and, in the event of body contact, may cause serious
injury! Before carrying out any work on the electrical system, the
electrical supply cable and all external power lines must be made voltage-
free!
► Make the electrical supply cable to the dryer voltage-free.
► Secure the electrical supply cable to the dryer against switch-on.
Re-start
Depending on the fittings installed by the operator and the actual pressure
conditions, the unit might have to be restarted at operating pressure. The
following general rules apply:
The deactivated dryer is open in main flow direction.
If compressed air system and dryer have remained at operating pressure
► Ensure that the compressed air inlet valve (provided by the operator) is open.
► Set ON/OFF switch to
I
.
The program continues the cycle from the point at which it was interrupted..
The ambient temperature must not drop be
Avoid a sudden drop in pressure in any circumstance! If pressure drops
too fast, this may cause damage to the dryer. Therefore, the compressed air
outlet valve must always be opened quite slowly!
► Slowly open the compressed air outlet valve installed by the owner. Observe
the vessel pressure gauge of the pressurised vessel. The pressure should
not drop below the operating pressure (if poss.).
—
In no pressure retention valve is installed:
Keep the compressed air outlet valve in a slightly open position until the
compressed air system downstream of the dryer has filled up completely;
only then should the valve be opened fully.
The dryer is now back in operation and is working fully automatically.
If compressed air system and dryer have not remained at operating pressure
► If disconnected, reconnect the voltage supply of the dryer.
► Pressurise and switch on the dryer as described in the section
compressed air supply and switch on dryer
on page 31.
The dryer is now in operation again and operates fully automatically.
