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4. Air fi ltration (picture
)
Caution – inadequate maintenance
The capacity of the MICOVA can be reduced if the air fi lters are not maintained correctly.
The fi lter cartridges (e) for vacuum and (f) for compressed air have to be cleaned depending on the amount of contamination. This is achieved by
blowing compressed air from the inside of the cartridge outwards.
Even if the cartridges are cleaned their separating effi ciency deteriorates. We would therefore recommend exchanging the cartridges half-yearly.
The fi lter cartridges (e and f) can be removed for cleaning after removing the thumb screws (h) and the fi lter housing cover (g).
The fi lter housing chambers should also be cleaned (be careful that no impurities get into the pumping chamber).
5. Coupling (picture
)
The tooth rim (k) is a wearing part and should be checked once a year.
Caution – defected tooth rim
Defected tooth rim can cause extensive damage and even in some
extreme cases break the rotor shaft.
To check the coupling, stop the motor (m) and isolate. Remove the
screws (s
) on the motor fl ange (n). Pull off the motor together with the
5
motor side coupling half (q). If the tooth rim (k) is damaged or worn then
exchange the rim. The fan (v) should be also checked regularly on demages
and if necessary be exchanged.
Re-assemble in reverse order.
Trouble Shooting:
1.
Motor starter cuts out pressure/vacuum pump:
1.1 Check that the incoming voltage and frequency corresponds with
the motor data plate.
1.2 Check the connections on the motor terminal block.
1.3 Incorrect setting on the motor starter.
1.4 Motor starter trips too fast.
Solution: Use a motor starter with a time delay trip (version as per
IEC 947-4).
1.5 Filter cartridges of exhaust fi lter are contaminated.
1.6 The regulating valves are dirty causing excess pressure or vacu-
um.
2.
Insuffi cient suction or pressure capacity:
2.1 Inlet and/or exhaust fi lters are obscured.
2.2 Suction pipework is too long or too small.
2.3 Leak on the pump or the system
2.4 Blades are damaged.
3.
Pressure/vacuum pump operates at an abnormally high tem-
perature:
3.1 Ambient or suction temperature is too high.
3.2 Cooling air fl ow is restricted.
3.3 Problem as per 1.5 and 1.6.
4.
Unit emits abnormal noise:
4.1 The pump cylinder is worn.
Solution: send your complete unit off for repair to the supplier or
approved service agent.
4.2 The regulating valve is noisy.
Solution: replace valve.
4.3 Blades are damaged.
Appendix:
Repair on Site: For all repairs on site an electrician must disconnect the motor so that an accidental start of the unit cannot happen.
All engineers are recommended to consult the original manufacturer or one of the subsidiaries, agents or service agents. The address of the near-
est repair workshop can be obtained from the manufacturer on application.
After a repair or before re-installation follow the instructions as shown under the headings "Installation and Initial Operation".
Lifting and Transport: To lift and transport the KTR units the eyebolt on the pump must be used.
The weight of the pumps are shown in the accompanying table.
Caution – eyebolt
The screw (s
) on the eyebolt (G
3
Storage: KTR units must be stored in dry ambient condi-
tions with normal humidity. We recommend for a relative
humidity of over 80% that the pump units should be stored
in a closed container with the appropriate drying agents. We
recommend to avoid a storage of more than one year.
Note
After quite some storage we recommend a functional
test before initial operation.
Disposal: The wearing items (as listed in the spare parts
lists) should be disposed of with due regard to health and
safety regulations.
Spare parts lists: E 461 ➝ KTR
) must be tightly screwed down (see picture
3
KTR
Noise level (max.)
Sound power
Weight (max.)
Length (max.)
Width
Height
f
g
h
m
s
5
).
50 Hz
dB(A)
60 Hz
50 Hz
dB(A)
60 Hz
- 4 -
G
s
3
3
n
q
k
v
140
90
92
97
99
kg
155
mm
964
mm
406
mm
369
e
7.07
/ indd4
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