CompAir 5211.2.IA, Operator'S Manual

Page: 29 / 62

CompAir UK Ltd PUBLICATION 98407/1050
Page 27
8 OPERATION AND ROUTINE MAINTENANCE
8.1 OPERATION AND GENERAL MAINTENANCE
Commissioning procedure should be used:-
(a) For first commissioning run.
(b) Following overhaul.
(c) After standing idle for a long period.
Crankcase oil needs to be changed after major overhaul.
Starting procedure should be observed after valve cleaning/change.
Keep the exterior of the compressor clean, especially pipe connections and joints, as this will
assist in detecting any leaks. Ensure finned intercooler is clean at all times.
Monitor and record pressures and temperatures in order to give advanced warning of any
malfunction. Ambient conditions, especially temperatures, will vary readings but they are usually
within plus or minus 4%.
Marking the pressure gauge glass at the normal running pressure will allow easy comparisons of
pressure to be made in the future.
8.2 STARTING UP
Check crankcase oil level. Top up if necessary with recommended oil until the level up to the
maximum level mark on sight glass.
Set stop valves and adjust trip circuits correctly.
Check that all loose equipment and tools are clear of compressor and ancillary equipment.
Operate starter, and bring on to load. Oil level will drop in glass when machine is running.
Unloader/bleed valve will close automatically.
On engine sets start in accordance with engine suppliers operating manual and close manual
drain/unloading valve only when engine is up to speed. Bring on to load as for electric sets.
Whilst the compressor is running, listen for any noises indicative of mechanical failure. Stop and
investigate if:-
1) Any uncharacteristic noises commence.
2) Any safety valve opens.
WARNING:-
THE CAUSE OF A SAFETY VALVE OPENING MUST BE INVESTIGATED AND RECTIFIED.
DO NOT ATTEMPT TO PREVENT A VALVE OPENING BY TAMPERING WITH ITS SETTING.
THIS IS EXTREMELY DANGEROUS.
8.3 RUNNING ON LOAD
Check temperatures and monitor gauges for normal pressures.
When fitted, operate manual drains at 30 minute intervals.
NOTE: These machines will normally be under automatic stop/start control unless engine driven,
when manual control is more usual.
8.4 STOPPING
When not fitted with automatic stop/start controls the compressor can be stopped by the push to
stop button on the starter.
Always isolate electric supply at the end of an operational duty period.
On engine sets - stop the engine in accordance with engine operating manual and manually open
drain/unloader valve to allow unloaded restart when required.