On Setpoint Off Setpoint

OptiView Control Center (continued)

FORM 160.81-EG1

•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 COMPRESSOR screen, displays a pictorial of the by- pass 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 capabil- ity 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.

Display Only:

•Discharge Temperature

•Discharge Superheat

•Oil Pressure

•Discharge Pressure

•Differential Oil Pressure

•Differential Filter Pressure

•Oil Return Solenoid (LED)

•Evaporator Pressure

•Condenser Pressure

•Condenser Saturation

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, depend- ing on chiller configuration. The Programmable pulldown demand to automatically limit motor load- ing can be used to minimize building demand charges. Pulldown time period control over four hours, and verification of time remaining in pulldown cycle from display readout. Separate digital setpoint for current limiting between 30 and 100%.

The ELECTRO-MECHANICAL STARTER (E–M) screen displays a picture of the starter and the follow- ing values. The ones below are common among both offerings and the values will be displayed on both types of starter screens. From this screen you can perform the following:

Display Only:

•Motor Run (LED)

•Motor Current % Full-load Amps

•Current Limit Setpoints

•Pulldown Demand Time Left

Programmable:

•Local Motor Current Limit

•Pulldown Demand Limit

•Pulldown Demand Time

The SOLID STATE STARTER (SSS) screen displays a picture of the starter and the following values, which are displayed in addition to the common ones listed above. From this screen, you can perform the following:

Display Only:

•Input Power kW

•kW Hours

•Starter Model

•Voltage – Phase A, B, C

•Current – Phase A, B, C

•Temperature – Phase A, B, C

8	YORK INTERNATIONAL