Sullair 02250165-411 R01, User Manual

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WS CONTROLLER USER INTERFACE MANUAL SECTION 3
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3.4 CALIBRATION OF P2
PRESSURE TRANSDUCERS
The compressor is equipped with a pressure
transducer that measures the output line (P2)
pressure. Over time, the pressure transducer may
vary slightly producing an inaccurate reading at the
controller. Periodically and prior to operating multiple
controllers in a sequence, the controller should be re-
calibrated to reflect the same measurement of P2
pressure through out the system. The re-calibration
is best done when the system is at a stable pressure.
Calibration of the WS Controller P2 pressure reading
is accomplished using the WSPC User Interface
Software Program. Refer to the WSPC User
Interface Manual for details on calibrating the P2
system pressure measurement.
3.5 REMOTE UNLOAD
As a default configuration, the compressor is
provided with one input to allow user- furnished
external remote control. This may be wired to a
remote switch, timer, or other controls to halt
operation of the compressor as desired. To enable
remote control of the compressor:
1. Wire the remote contact to junction J4-7 and
any vacant J3 terminal.
2. Access the PC User Interface software. At
the User Adjustments display screen, select
one of the following sequencing modes:
“Remote”, “Hours”, or “Com Number”.
Remote operation is disabled if the sequenc-
ing mode is “Disabled” or “Slave”.
3. Once enabled, the controller will respond to
the wired input.
• If the contact is closed, the compressor unloads
and stops delivering air to the system. If the oper-
ating mode is AUTOMATIC, the compressor will
stop after running unloaded for the period set in the
“Unload Minutes” setting. When operating in a
group of sequenced compressors, this removes
only this compressor for service.
• If the contact is open, the compressor operates nor-
mally.
The WS Controller is field configurable for other
remote functions with additional contacts or fieldbus
commands. Refer to the WSPC manual for details.