Champion Compressors Ltd. Manual No. 975203 Rev H
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9.0 OPTIONS
The following is a selection of options, which may have been ordered with
your compressor.
9.1 Lead/Lag, Remote Monitoring & Control.
A pair of compressors may be controlled by a central control box, equipping
the package with ‘Lead / Lag’, ‘Duty / Standby’, and ‘Remote monitoring and
control’ capabilities.
Lead/Lag controls allow two compressors to operate in tandem. One unit is
selected to be the lead unit and the other the lag unit. In this situation, the
lead unit will provide the base air supply for the plant requirement. The lag
unit will provide any additional air as required during peak demands. The lead
and lag functions should be alternated between the two units by regularly
reversing the selector switch on a periodic (daily or weekly) basis.
Duty/Standby operation may be selected as an alternative to Lead/Lag.
Power is supplied to one compressor only (the ‘duty’ compressor). In the
event that the ‘duty’ compressor must be stopped, (eg. routine service), the
‘standby’ compressor may be called upon so that there is no interruption to
the plant’s supply of compressed air.
NOTE:
When more than one compressor is installed with a parallel connection, care
must be taken when piping the discharge air. Incorrect piping may result in
condensate accumulating in the mains piping and draining back to a
compressor that remains idle or on Standby for a period of time. Generally,
having the compressor discharge pipework higher than the junction to the
mains piping at some point will avoid the problem.
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