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 servic-
ing and maintenance work. The unit vents automatically when
switched off but if there is a fault the unit might remain pressur-
ised even after being switched off. Since this is not evident from
the outside it is always essential to vent the unit before servic-
ing work.
Beware of burns when unit is at operating temperature!
The oil filler plug can reach temperatures
up to approx. 110 °C ! Always use gloves when handling
the oil filler plug!
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
The first five rotations of this plug must be made
slowly in an anti-clockwise direction until the detect-
able “snap point” is reached; the oil filler plug has a
side safety borehole through which the residual
pressure can gradually discharge.
4
Wait until all the pressure in the unit has been re-
lieved; the unit is now depressurised.
Contents
Why vent?
Venting the com-
pressor system
