CompAir UK Ltd
PUBLICATION 98407/1050
Page 23
A non-return valve is fitted to the delivery fitting to allow two or more machines to be connected to
a common main and delivery unloading to be used.
Stop valves must be fitted in pipelines to isolate compressor and control equipment. Unloader and
control piping must be as short as possible. Inlets and outlets on air receivers must be well above
any condensate level.
Safety valves, (relief valves), are fitted as standard equipment to compressor. Safety valves must
also be fitted to the receiver pipeline system to protect this from any excessive pressure build up.
6.7 ELECTRICAL
The electrical connections to the set must always comply with any local regulations which are
applicable, and be suitable for the electrical loads involved. Wiring must be installed by a qualified
electrician. As the maintenance periods for the compressor are determined on an hours run basis,
some accurate method of operational time recording should be employed to indicate when routine
maintenance becomes due.
For this purpose, it is recommended fitting a meter to the unit to record hours run.
6.8 SITING
REQUIREMENTS
(Diagrams not to scale)
RECOMMENDED INSTALLATION
INCORRECT INSTALLATION
COOLING AIR ENTERS, PASSES
COOLING AIR ENTERS, PASSES
OVER MACHINE AND AS HEATED
OVER MACHINE AND THEN AS
AIR, IT IS EXHAUSTED FROM THE
HEATED AIR, RE-CIRCULATES
MACHINE ENVIRONMENT.
IN MACHINE ENVIRONMENT.
NOTE:
In small buildings and enclosures the inlet and outlet vents should have a minimum cross
sectional area of 0.3 m
2
and for enclosures the fan inlet should be sealed by means of a duct
between fan guard and the wall to prevent re-circulation of cooling air.
When the compressor has to be situated next to a wall or bulkhead in a large building in which
there is no opening, the fan cowl inlet must always be more than 300mm from the wall or bulkhead
to avoid restriction of cooling air flow to the compressor.
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