York YK Series User Manual

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
JOHNSON CONTROLS
57
FORM 160.54-O1
ISSUE DATE: 9/10/2014
2
OVERVIEW
This screen displays a cutaway view of the chiller com-
pressor, revealing the impeller, and shows all condi-
tions associated with the compressor. In addition, with
the proper access level, the Pre-rotation Vanes may
be manually controlled. Animation of the compressor
impeller indicates whether the chiller is presently in a
RUN condition. This screen also serves as a gateway to
subscreens for calibrating the Pre-rotation Vanes, cali-
brating the Proximity Probe, configuring the Hot Gas
Bypass, or providing advanced control of the Com-
pressor Motor Variable Speed Drive.
DISPLAY ONLY
Oil Pressure
Displays the pressure differential between the high
side oil pressure transducer (compressor bearing input)
and the low side oil pressure transducer (oil sump). The
displayed value includes offset pressure derived from
auto-zeroing during the System Prelube. If either of the
transducers used to calculate this differential is out of
range, the display field will show XX.X.
The offset pressure is the pressure differential between
the high oil pressure (HOP) transducer and the low
oil pressure (LOP) transducer outputs during a three
(3) second period beginning ten (10) seconds into the
System Prelube. During this time, the transducers will
be sensing the same pressure and their outputs should
indicate the same pressure. However, due to accuracy
tolerances in transducer design, differences can ex-
ist. Therefore to compensate for differences between
transducers and assure differential pressure sensing ac-
curacy, the offset pressure is subtracted algebraically
from the differential pressure. The offset pressure cal-
culation will not be performed if either transducer is
out of range. The offset value will be taken as 0 PSI in
this instance.
Oil Sump Temperature
Displays the temperature of the oil in the sump.
Discharge Temperature
Displays the temperature of the refrigerant in its gas-
eous state at discharge of the compressor as it travels
to the condenser.
COMPRESSOR SCREEN
(STYLE E AND EARLIER CHILLERS WITH G, H, OR J COMPRESSORS
AND STYLE G CHILLERS WITH K COMPRESSORS)
LD09574
FIGURE 17 - COMPRESSOR SCREEN (STYLE E AND EARLIER CHILLERS WITH G, H, OR J COMPRESSORS
AND STYLE G CHILLERS WITH K COMPRESSORS)

York YK Series Specifications

General

Brand	York
Model	YK Series
Category	Chiller
Language	English