Compressor Screen; Figure 16 - Compressor Screen (All "P" Compressors And Style F And Later Chillers With G, Q Or H5-8 Com- Pressors) - York YK Series Operation Manuals

FORM 160.54-O1
ISSUE DATE: 9/10/2014
(ALL "P" COMPRESSORS AND STYLE F AND LATER CHILLERS
FIGURE 16 - COMPRESSOR SCREEN (ALL "P" COMPRESSORS AND STYLE F AND LATER CHILLERS WITH
G, Q OR H5-8 COMPRESSORS)
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.
Requires a login access level of SERVICE.
Service Technicians refer to the OptiView
Control Center - Service Instructions
(Form 160.54-M1) for operation instruc-
tions and explanation of all programmable
setpoints and displayed values.
JOHNSON CONTROLS

COMPRESSOR SCREEN

WITH G, Q OR H5-8 COMPRESSORS)
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
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
00549VIP
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