Nederman FlexPAK Standard User Manual Download

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FlexPAK

NOTE!
• Some materials may undergo chemical reac-

tions in combination with humidity/water.
Such humidity may, for example, form if the
humidity in the extracted air is condensed in
the filter.

• Materials extracted by the unit is to be con-

sidered waste and is to be discarded.

5.1 Before initial start-up

NOTE!
The unit is NOT to be operated under any cir-
cumstances without directing the exhaust air
away from the unit.

It is important that no dust, objects or debris are al-
lowed to fall down into either the inlet or outlet of the
side channel fan.

The unit with its accessories are tested before deliv-
ery, and all functions are checked. Before the initial
start-up ensures the following:
• The maintenance switch has been installed, see

Fig-

ure 9

item 8.

• The room where the unit is located, if small, has ad-

equate ventilation. See the Installation and Service
Manual.

• The ducting is connected to the dust collector inlet.
• An exhaust air duct is attached to the outlet to dir-

ect hot exhaust air away from the unit.

• The compressed air supply is permanently connec-

ted. Idle mode and the filter cleaning will not work
properly without a compressed air supply.

• The PS cable is connected, but no valves at works-

ites are open.

• Make sure that the ground check measurement has

been performed. See the Installation and Service
Manual.

5.2 Initial start-up

WARNING! Risk of electric shock
• Unauthorized personnel may NOT remain in

the vicinity of the unit when the control unit
is open. Authorized personnel performing
inspections and adjustments on the control
equipment need to be careful to avoid elec-
trical shocks.

• Always disconnect the supply voltage using

the maintenance switch when performing in-
spections and adjustments. If the frequency
converter has to be opened, wait 5 minutes
after disconnecting power to avoid a static
electric shock.

NOTE!
Ensure that no valves at any workstations are
open.

• Remove the control unit lid since checks and adjust-

ments in the control unit may be necessary during
the initial start-up. The PLC and the software are
password-protected.

The initial start-up is to be performed with the acous-
tic enclosure removed to verify the direction of ro-
tation. Refit the acoustic enclosure when all checks
have been performed.

5.2.1 Check the filter cleaning function

When the unit is in Running mode, see

Sec-

tion 6.1.3 Running (Running mode)

, press the filter

cleaning button, see

Figure 8

, and check that the filter

cleaning procedure starts.

The filter cleaning function consists of the Filter
Cleaning Valve (FCV), which is a pneumatic cylinder
with a valve disc. The FCV is located at the top of the
filter housing under the enclosure, see

Figure 8

item

A distinct change in sound can be heard as the valve
releases atmospheric air into the filter, indicat-
ing that the function works properly. See also

Sec-

tion 3.1 Function

5.2.2 Check the automatic start and stop
function

NOTE!
This procedure only works if default PLC set-
tings are used.

• Press the Standby/Running button to put the unit

into Standby mode.

The unit is not to start until a valve is opened at a
workplace activating its microswitch, or the test start/
filter cleaning button is pressed, see the top of

Fig-

ure 8

and

Section 8.3 Filter cleaning in Running mode

When the valve closes, the unit switches over to Idling
mode and after a delay of approximately 10 seconds, a
filter cleaning operation is performed.

After an additional time delay of approximately 12
minutes, the unit will go into Standby mode.

The filter cleaning delay is set by the DIR_time relay,
and the stop delay is set by the SSR_time relay.
• With all valves at the workstations closed, check

that the motor slows down (a distinct change in
sound can be heard) and that switching to Idling
mode with filter cleaning takes place after approx-
imately 10 seconds.

Approximately 12 minutes after the unit has switched
to Idling mode, it should go to Standby mode due to
the SSR function switching off.