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3. Cooling (pictures
and
The air slots for the cooling air exits (F) in the
grill (G
) or the space between the cooling fins (E
1
may become clogged by dust. They can be
cleaned, by blowing out with compressed air,
after removing the cover plates (G
4. Coupling (picture
)
The coupling rubbers (k) are wearing parts and
should be checked regularly. When the coupling
rubbers are worn this can be detected by a
knocking sound when the blower is started.
Defective coupling rubbers can cause
extensive damage and even in some
extreme cases break the blower shaft.
To check the coupling, stop the motor (m) and
isolate. Remove the screws (s
motor together with the motor side coupling
half (q). If the coupling rubbers (k) are damaged
remove the circlips (l) from the coupling bolt (r)
and exchange the coupling rubbers (k). Leave
the spacer (p) in place, check the coupling
bolts (r) for any wear and replace if necessary.
To replace, screw off motor flange cover (n),
remove the shaft nut (w
) with spring shim (u
1
pull off the coupling (q
) from the blower shaft.
1
Remove the nut (w) with washer (u) and ex-
change the coupling bolts.
Re-assemble in reverse order.
Trouble Shooting:
1.
Compressor does not reach operating speed when starting:
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.
2.
Motor starter cuts out blower:
2.1 Problem as per 1.1 and 1.2.
2.2 Incorrect setting on the motor starter.
2.3 Motor starter trips too fast.
Solution: Use a motor starter with a time delay trip (version as per IEC 947-4).
2.4 The regulating valve is dirty causing excess pressure.
3.
Insufficient pressure capacity:
3.1 Inlet filters are obscured.
3.2 Pressure pipe work is too long or too small.
3.3 Leak on the compressor or on the system.
4.
Compressor does not reach overpressure:
4.1 Leak on the compressor or on the system.
4.2 Motor rating selected was too small.
5.
Compressor operates at an abnormally high temperature:
5.1 Ambient or suction temperature is too hot.
5.2 Cooling air flow is restricted.
5.3 Problem as per 2.4.
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 nearest
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 units SMD the eye bolt on the pump must be used.
The weight of the blowers are shown in the accompanying table.
Storage: COVAC units must be stored in dry
ambient conditions 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.
Disposal: The wearing parts (as listed in the
spare parts lists) should be disposed of with due
regard to health and safety regulations.
Spare parts lists: E 661
E 662
)
)
1
) and (G
).
2
3
). Pull off the
5
),
1
SMD
Noise level (max.)
Sound power
Weight (max.)
Length (max.)
SMD 500
Width
SMD 160/ 300
Height
m
s
5
q
n
p
l
r
k
50 Hz
dB(A)
60 Hz
dB(A)
50/ 60 Hz
mm
mm
mm
w
u
q
1
1
1
E
u w
1
160
300
83
86
87
87
- / 95
94 / 97
kg
225
245
1312
1312
805
805
652
652
500
83
87
96 / 100
490
1605
963
798
11.2000
/ PM6
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