WVM_BASIS_EN_03—07/2016
39
The vacuum pump direction is correct, if the fan wheel rotates in the direction of
the arrow.
Procedure if direction of rotation of the vacuum pump is correct
►
Set main switch to position "0".
►
Insert heater fuses.
Procedure if direction of rotation of the vacuum pump is
not
correct
Even short-term operation of the dryer with incorrect direction of rotation of the
vacuum pump might lead to damage to the heater. Therefore, always correct
pump direction, if necessary.
►
Set main switch to position "0".
►
Disconnect dryer from power supply.
Caution! Risk of electrocution!
Prior to adjusting direction of rotation, disconnect the unit from the power
supply. Otherwise, there is a risk of serious injury from live cables and
components!
►
Exchange cables L1 and L2 at the terminals.
►
Check direction of rotation of the vacuum pump as described on page 38.
►
Insert heater fuses.
Proceed with starting the dryer.
Note:
Checking can be facilitated for vacuum pumps starting up immediately
(i.e. without star-delta circuit, see circuit diagram in the Appendix):
►
Remove fuses of the heater.
►
Turn on main switch..
►
Briefly actuate the contactor for the pump (see circuit diagram), e.g.
with a screwdriver.
►
Check and if necessary correct the direction of rotation (see above).
