8 JOHNSON CONTROLS
OptiView Control Center - continued
The COMPRESSOR screen displays a cutaway view of
the chiller compressor, revealing the rotary screw, and
shows all conditions associated with the compressor. The
slide valve positioning is animated and with the proper
Access level, it can be manually controlled. Animation
of the compressor rotors indicates whether the chiller is
presently in a RUN condition. This screen also serves as
a gateway to sub-screens for calibrating the slide valve
or conguring the optional Hot Gas Bypass. From this
screen you can view the following:
Display Only:
• Differential Oil Pressure
• Oil Temperature
• Discharge Temperature
• Discharge Superheat
• Slide Valve Position
• Oil Return Solenoid (LED)
• Full Load Amps (E.M. Starter Only)
• Phase A, B, C Current (SSS Only)
Programmable:
• Slide Valve Load (Manual)
• Slide Valve Hold (Manual)
• Slide Valve Unload (Manual)
• Slide Valve Auto
• Max. Load Temperature
• Minimum Load FLA
• Minimum Load Control Source
The HOT GAS BYPASS screen, accessed from the COM-
PRESSOR screen, displays a pictorial of the bypass line
and solenoid valve location on the chiller. The Hot Gas
ON and OFF Setpoints are programmed on this screen
and system parameters pertinent to Hot Gas Bypass
operation are displayed. An LED illuminates when the
Hot Gas solenoid is ON. If the chiller is equipped with
the Hot Gas Bypass option, operation must be enabled
on the OPERATIONS screen. From this screen you can
perform the following:
Display Only:
• Slide Valve Position
• Return Chilled Liquid Temperature
• Leaving Chilled Liquid Temperature
• Hot Gas Solenoid (LED)
Programmable:
• On Setpoint
• Off Setpoint
The SLIDE VALVE CALIBRATION screen displays a
cutaway view of the chiller compressor, revealing the
rotary screw and slide valve and provides the capability
of calibrating the slide valve. From this screen, you can
perform the following:
Display Only:
• Slide Valve Loading (LED)
• Slide Valve Unloading (LED)
• Calibration Message
Programmable:
• Start Calibration
• Cancel Calibration
The OIL SEPARATOR screen displays a close-up view
of the chiller oil separator/sump and provides all the nec-
essary setpoints for maintaining the Variable Speed Oil
Pump (VSOP). This screen also allows manual control
of the Frequency Command sent to the VSOP. From this
screen you can perform the following:
Display Only:
• Discharge Temperature
• Oil Sump Temperature
• Discharge Superheat
• Oil Pressure
• Filter Pressure
• Seal Pressure
• Differential Oil Pressure
• Differential Filter Pressure
• Differential Seal Pressure
• Offset Pressure
• Oil Return Solenoid (LED)
• Low Separator Oil Level (LED)
1. The MOTOR “soft” key on the HOME screen, when
pressed, shows a picture of either a YORK Electro-
Mechanical Starter or a Solid State Starter, depending
on chiller conguration. The Programmable pulldown
demand to automatically limit motor loading can be
used to minimize building demand charges. Pulldown
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