5 Appendix II — Application Info
36
Meritor WABCO Maintenance Manual 34 (Revised 03-16)
System Saver Series Installation Criteria
Operating Parameters Requirements
Pressure requirements Maximum pressure 140 psi (965 kPa)
Minimum governor cut-out
pressure
115 psi (793 kPa)
Governor range 15 to 25 psi (103 to 172 kPa) (cut-out — cut-in)
Flow capacity Compressor rating 25 cfm maximum
Compressor on-time Normal running Two minutes maximum
Occasional (three times per
day maximum)
Seven minutes
Compressor unloaded time Minimum for purge cycle 20 seconds
Maximum duty cycle Compressor on-time total
running time
30%
Discharge line Temperature at inlet port
determines required length
and diameter.
To minimize the likelihood of a discharge line blockage during cold
climate operation, it is recommended that for discharge lines
exceeding nine feet (2.75 m) in length, a minimum of three feet
(0.91 m) of 1/2-inch (127 mm) thick closed-cell polyethylene pipe
insulation be used at the connection to the air dryer.
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