II/14
UNM
GB
Adjusting V-belt tension:
1. Remove outer belt guard grating.
2. Mark the position of the electric motor on
the base plate.
3. Unscrew the mounting screws of the mo-
tor (Figure 8b).
4. Move the motor towards the compressor
unit. Take off the V-belt.
5. Push the motor approx. 2 mm parallel
past the mark. Tighten the mounting
screws.
6. Fit the V-belt over the small V-belt disc
first, then stretch it over the large V-belt
disc.
7. Check the V-belt tension and repeat the
process if necessary.
8. Install outer belt guard grating.
2.6.11 Cleaning/replacing the
check valve
1. Unscrew the locking screw (Figure 6a).
2. Clean the insert and seat.
3. Replace the insert in case of damage,
squeezing or hardening.
4. If the seat is damaged, replace the entire
check valve.
2.6.12 Replacing the safety valve
1. Detach the safety valve (item 11) by un-
screwing it anticlockwise.
2. Screw the new safety valve into place by
screwing it clockwise.
2.7 Decommissioning
Observe the safety instructions!
2.7.1 Preservation
Preservation of oil-lubricated compressors is
necessary if the compressor is taken out of
service for a long period (over 6 months) or
is new from the factory and will not be oper-
ated until much later.
1. Switch off the compressor. Disconnect
the power supply.
2. Allow the oil to drain. See Chap. 2.6.7.
3. Fill corrosion inhibiting oil (viscosity SAE
30). Insert the oil filler plug or oil dip-
stick.
4. Allow the compressor to warm up, switch
it off.
5. Switch off the compressor. Disconnect
the power supply.
6. Drain condensate.
7. Depressurise the compressor.
Store the compressor and a dust-free and
dry area where it is not exposed to high tem-
perature fluctuations.
2.7.2 Disposal
Dispose of the unit and packaging materials
according to applicable regulations.
2.8 Troubleshooting
Observe the safety instructions!
Problem
Cause
Remedy
A Protective motor
switch interrupts
power supply.
In case of malfunctions (e.g.
overheating; low voltage;
extension cable too long or
with incorrect cross-section),
the protective motor switch is
tripped.
X
Switch off the compressor. Wait
a short while. For compressors
with an external protective motor
switch: actuate the switch.
Switch on the compressor.
If the protective motor switch is
triggered again: switch off the
compressor. Disconnect the pow-
er supply. Contact the service
partner.
B Pressure relief does
not function
The pressure relief is shut
down by an interruption of the
power supply or voltage drop in
the mains when the compres-
sor is switched on.
X
Switch off the compressor. It de-
pressurises. Switch on the com-
pressor.
Summary of Contents for T100102
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