Nederman FlexPAK Standard, Installation And Service Manual

FlexPAK

NOTE! 
• Filter replacement is to be noted in the ser-

vice protocol of the unit.

• Replacing individual filter bags is possible,

but it is recommended that the whole fil-
ter package is replaced since it is quicker
and causes less spreading of dust. If the fil-
ter bags are replaced separately, the plastic
holders will also have to be replaced.

1

Unscrew the four screws holding the lid, lift it a
bit for access to the hose connection. If necessary
disconnect the outlet to remove the lid. See 

Fig-

ure 15

.

2

Detach the hose from the filter, see 

Figure 16

,

item A.

3

Remove the hose and cable to the cleaning valve,
alternatively the entire valve, see 

Figure 16

, item

B

4

Loosen the screw for the lower sealing ring hold-
ing the filter top, see 

Figure 17

, item A.

5

Lift of and put the filter top away.

6

Select one of two methods to remove the filter -
tilting the filter or using a lifting device - and con-
tinue with the steps accordingly.

7

Lifting device: Lift the filter straight up with a
crane or other lifting device, see 

Figure 21

.

8

Tilt: Unscrew the eight screws for the protection
plate and remove it, see 

Figure 18

.

9

Tilt: Unscrew the eight screws (four on each side)
attaching the filter to the frame legs according to
item A in 

Figure 19

 and item C in 

Figure 17

.

NOTE! 
If you cannot reach the four screws on the
other side, remove the side marked as item
B in 

Figure 17

.

10 Tilt: Press the spring in the center with an appro-

priate tool according to item B, tilt the filter hori-
zontally and remove the filter, see 

Figure 19

 and

Figure 20

.

11 Insert the new filter and note the fitting of the

rubber sealing rings. See 

Figure 22

. Items A–C,

shows how the rubber sealing rings are to be fit-
ted. When a used sealing ring is to be re-used, the
form when open may differ from the original form
as shown in item A. Use a screwdriver to bring the
edge of the module between the rubber lips to ob-
tain the result shown in item C.

NOTE! 
Fitting the steel ring correctly is important
to maintain the tightness and durability of
the unit.

12 Assemble the unit in reversed order.

6.5 Check the filter cleaning function

WARNING! Risk of personal injury
Crush hazard. Pay attention when the com-
pressed air pressure cylinder and valve disc
move. Make sure that the protection hood over
the filter cleaning unit is fitted after the check.

Check the automatic filter cleaning as follows:
1

Check the automatic cleaning equipment once a
year.

2

Remove the top cover from the filter and inspect
the valve disc.

3

Start the unit and press the filter cleaning button,
see 

Figure 8

. The compressed air cylinder should

lift the valve disc. Loud noise can be heard as air
rushes into the filter bin to blow off the dust from
the outside of the filter package. This will be re-
peated 3 times for each filter cleaning cycle.

4

Stop the vacuum unit and shut off the air supply.

5

Check the valve disc fastening, damage and wear.
Replace if required.

6

Replace the protecting top cover.

6.6 The motor and the fan unit

Inspect and clean the motor compartment regularly.

The motor has 2 ball bearings. The bearings are to be
replaced after approximately 15,000 hours of opera-
tion. If the ambient temperature often reaches 35°C
(95°F), the time between replacements is to be re-
duced. In any case, the bearings are to be replaced
every fifth year.

The bearings are a standard type. Contact Nederman
or an authorized Nederman distributor for replace-
ment of the bearings.

Old grease is to be removed and new grease used. The
grease is to meet the DIN 51825-K2N 40, SKF LGHP 2
or FAG Arcanol Multitop standards.

6.7 Cooling filter for the frequency con-
verter

The service life of the cooling filter for the frequency
converter depends on the air-bound dust surround-
ing the vacuum unit. The expected service life is 6–48
months. Check the filter regularly through the filter
holder grid. If the filter is clogged, the frequency con-
verter will shut off due to overheating.

Ensure that the cooling filter is not exposed to any
combustible materials. Running the unit without the
cooling filter may cause serious damage. When chan-
ging the filter, see the label placed over the filter in-
take.

The unit may never be run without a cooling filter for
the frequency converter.

23