Operation Manual
RENNER Compressors
5 Maintenance
5-6
5.3 Venting the compressor system
This section outlines the main points to be taken into account
when the unit has to be vented.
The pressure has to be removed from the unit before all
servicing and maintenance work. The unit vents automatically
when switched off but if there is a fault the unit might remain
pressurised even after being switched off. Since this is not
evident from the outside it is always essential to vent the unit
before servicing work.
Beware of burns when unit is at operating temperature!
The oil filler plug can reach temperatures of up to approx.
110 °C! Therefore always wear safety gloves when
touching oil filler plugs!
When the oil filler plug is unscrewed the residual pressure
may cause hot oil to squirt out! It is therefore essential to
wear safety goggles!
It is essential to adhere to the following instructions in order to
avoid the above risks of personal injury or death:
Step Operation
1
Switch off the unit and take measures to prevent it
from being restarted.
2
Unscrew cap on filler neck (oil filler plug) by hand.
3
Wait until all the pressure in the unit has been
relieved; the unit is now depressurised.
4
Turn the cap very slowly anticlockwise for the first
five turns.
Contents
Why remove the
pressure?
Venting the
compressor system
Safety valve
