Table of Contents
Advertisement
SECTION 2 – OPTIVIEW CONTROL CENTER
FIGURE 10 - COMPRESSOR 1 SCREEN
This screen displays a cutaway of the compressor #1 or
#2, revealing the impeller. Animation of the impeller
indicates when the compressor is running. Parameters
related to the compressor are displayed here. Also,
compressor manual control functions are performed
here. The Pre-rotation Vanes and Discharge Valve can
be manually controlled. This screen also serves as a
gateway to subscreens to calibrate the Pre-rotation
vanes and Proximity Probe.
Requires login access level of SERVICE.
DISPLAY ONLY
Oil Pressure
Displays the pressure differential between the Pump
Oil Pressure transducer for the compressor and the
common Sump oil pressure transducer. If either of
these transducers are out of range, the display field
will show XX.X PSID. The displayed value includes
the offset pressure derived from auto-zeroing during
the system pre-lube period. The offset pressure is the
pressure differential between the compressor Pump
Oil Pressure Transducer and the Sump Oil Pressure
transducer outputs during a three (3) second period
44
COMPRESSOR 1 OR 2 SCREEN
beginning ten (10) seconds into the system pre-lube
period. During this time, the transducers are sensing
the same pressure and their outputs should indicate
the same pressure. However, due to accuracy toler-
ances in transducers, differences can exist. Therefore,
to compensate for differences between transducers and
assure differential pressure sensing accuracy, the off-
set pressure is subtracted algebraically from the dif-
ferential pressure. The offset pressure calculation is
not performed if either transducer is out of range. The
offset value is taken as 0 PSI in this instance. If one
compressor is already running when bringing on the
second compressor, the offset calculation used will be
that which was calculated during the first compressor
pre-lube.
Oil Sump Temperature
Displays the temperature of the oil sump.
Discharge temperature
Displays the discharge temperature.
High Speed Thrust Bearing Proximity
Differential
Displays the distance between the high speed thrust
collar and the tip of the Proximity Probe for compres-
sor #1. This measurement takes into account the refer-
ence position established at the time of chiller manu-
facture.
FORM 160.79-O3
ISSUE DATE: 11/09/2018
LD27849
JOHNSON CONTROLS
Advertisement
Table of Contents
