Operation - Champion R Series Operation & Service Manual

Operation

This compressor has been inspected, thoroughly tested and approved at the factory. For this unit to
give long satisfactory service it must be installed and operated properly. This compressor has been
designed for an 80%/ON – 20%/OFF duty cycle.
SIMPLEX UNITS have a pressure switch that senses changes in receiver pressure and automatically starts
and stops the compressor at preset pressure limits. If the receiver pressure falls below the cut-in
pressure setting of the pressure switch the compressor will run until the cut-out pressure setting of the
pressure switch has been reached.
DUPLEX UNITS have lead (PS1) and lag (PS2) pressure switches and an automatic alternating system to
evenly distribute the load between the two compressors. The pressure switches sense changes in
receiver pressure and automatically start and stop the compressor at preset pressure levels. If the
receiver pressure falls below the cut-in pressure setting of the lead (PS1) pressure switch but remains
above the cut-in pressure setting of the lag (PS2) pressure switch, only one compressor will run until
receiver pressure reaches the cut-out pressure of the lead (PS1) pressure switch. The next time the
pressure in the receiver drops, the system automatically starts the compressor that was idle. If the
receiver pressure falls below the cut-in pressure setting of the lag (PS2) pressure switch, both
compressors run until receiver pressure reaches the cut-out pressure setting of the lead (PS1) pressure
switch.
CONTINUOUS RUN units are equipped with a ball valve, pilot valve and head unloaders to provide
continuous run capabilities. The pilot valve acts as an automatic air switch allowing air to flow from the
receiver to the head unloader mechanism, thus actuating it. To operate unit in continuous run, open
ball valve located next to pilot valve. The pilot valve is now able to sense receiver pressure. When the
receiver pressure reaches the cut-out pressure setting of the pilot valve, the pilot valve opens and air is
released to the unloader mechanism. The compressor stops compressing air and runs unloaded until
the cut-in pressure setting of the pilot valve has been reached. At this time air released from the
unloader mechanism and the compressor starts compressing again. Continuous run is recommended if
motor starts exceed 8 starts/hour.
INITIAL START UP – ELECTRIC MOTOR UNITS
1. Inspect unit for any visible signs of damage that would have occurred in shipment or during
installation.
2. Pull main disconnect switch to unit to assure that no power is coming into the unit. "Lock Out" or
"Tag Out" switch. Connect power leads to start.
Do not attempt to operate compressor on voltage other than that specified on order or on
compressor motor and control panel. Voltage conversion kits are available if alternate operating
voltage is required.
R-Series Electric
Operation & Service
14 CQF3473 v.01
April 17, 2018