York YR manual Programmable

FORM 160.81-EG1

The EVAPORATOR screen displays a cutaway view of the chiller evaporator. All setpoints relating to the evapo- rator side of the chiller are maintained on this screen. Animation of the evaporation process indicates whether the chiller is presently in RUN condition (bubbling) and liquid flow in the pipes is indicated by alternating shades of color moving in and out of the pipes. Adjustable lim- its on the low water temperature setpoints allow the chiller to cycle on and off for greater efficiency and less chiller cycling. The chiller cycles off when the leaving chilled water temperature is below setpoint and is ad- justable from 1°F (0.55°C) below to a minimum of 36°F (2.22°C). Restart is adjustable from setpoint up to a max. of 80°F (26.6°C). The Panel will check for flow to avoid freeze-up of the tubes. If flow is interrupted, shut- down will occur after a minimum of two seconds. The following can also be performed through this screen:

Display Only:

•Chilled Liquid Flow Switch (Open/Closed)

•Chilled Liquid Pump (Run/Stop)

•Evaporator Pressure

•Evaporator Saturation Temperature

•Return Chilled Liquid Temperature

•Leaving Chilled Liquid Temperature

•Evaporator Refrigerant Temperature

•Small Temperature Difference

•Leaving Chilled Liquid Temperature Setpoints – Setpoint

•Leaving Chilled Liquid Temperature Setpoints – Remote Range

•Leaving Chilled Liquid Temperature Setpoints – Shutdown

•Leaving Chilled Liquid Temperature Setpoints – Shutdown Offset

•Leaving Chilled Liquid Temperature Setpoints – Restart

•Leaving Chilled Liquid Temperature Setpoints – Restart Offset

•Ice Storage Active (LED)

Programmable:

•Local Leaving Chilled Liquid Temperature – Range

•Local Leaving Chilled Liquid Temperature – Setpoint

•Leaving Chilled Liquid Temperature Cycling Offset – Shutdown

•Leaving Chilled Liquid Temperature Cycling Offset – Restart

The CONDENSER screen displays a cutaway view of the chiller condenser. The liquid flow is animated to in- dicate flow through the condenser. All setpoints relat- ing to the condenser side of the chiller are maintained on this screen. With the proper access level this screen also serves as a gateway to controlling the Refrigerant Level. The following can also be viewed through this screen:

Display Only:

•Leaving Condenser Liquid Temperature

•Return Condenser Liquid Temperature

•Condenser Pressure

•Condenser Saturation Temperature

•Small Temperature Difference

•High Pressure Switch (Open/Closed)

•Condenser Liquid Flow Switch

•Condenser Liquid Pump (Run/Stop)

Programmable:

•High Pressure Warning Threshold

•Freeze Warning (Enabled/Disabled)

•Freeze Time

The COMPRESSOR screen displays a cutaway view of the chiller compressor, revealing the rotary screw, and shows all conditions associated with the compres- sor. 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 configuring the optional Hot Gas By- pass. 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)

YORK INTERNATIONAL 7