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E-PAK 150 DX/300 DX/500 DX
5.
Compare the direction of rotation with the arrow on the motor. If these
correspond, allow the starting procedure to continue.
6.
If the direction of rotation is incorrect, stop the unit by switching the
standby and reset switch to position 0. Disconnect power with the
maintenance switch. Open the start and control unit, see Figure 12, and
switch two of the incoming phase conductors. Refit the cover of the start
and control unit.
9.2.2
Checking the Y/D time setting
NOTE!
The Y/D time setting is factory preset and does not normally need to
be adjusted.
However, if adjustment is needed, the set time in Y mode should be just
sufficient for the motor to reach full speed before switching to D mode.
This is particularly important when the unit is equipped with a pilot signal. Too
long a time in Y mode means unnecessary heating of the motor and a delay
before the unit delivers full vacuum.
NOTE!
Too short a time in Y mode may damage the starter.
Adjust the Y/D timer K4T in order to increase or decrease the time-setting, see
Figure 12, item 3. To access the Y/D timer K4T, open the cover of the start and
control unit. Refit the cover of the start and control unit after adjustment.
9.2.3
Checking the automatic start and stop function
When switched to position 1, the lamp in the standby and reset switch should
light up indicating that the starter is in the standby mode and ready to receive a
signal from the PS cable.
In standby mode, the unit may be started by pressing the manual start button,
see Figure 12.
When a valve at a workstation equipped with a PS microswitch is opened, the
unit starts automatically. When the valve at the workstation is closed, the unit
switches over to idling mode and after a delay of approximately 30 seconds, a
filter cleaning operation is performed. The filter cleaning valve stays open.
After an additional time delay of approximately 10 minutes, the unit stops and
the filter cleaning valve closes.
The filter cleaning delay is set by the DIR time relay and the stop delay is set
by the SSR time relay.
9.2.4
Checking the filter cleaning function
Press the manual filter cleaning button, see Figure 12, and check that the filter
cleaning procedure starts. The filter cleaning valve is located at the top of the
filter housing under the enclosure. A distinct change in sound can be heard as
the valve releases atmospheric air into the filter, indicating that the function
works properly.
9.2.5
Checking the vacuum limiting valve
The vacuum limiting valve is located next to the side channel fan, see Figure 5,
item 5.
40
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