Specifications

7JOHNSON CONTROLS
FORM 160.80-EG1 (511)
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
(44.4°C). The Panel will check for ow to avoid freeze-
up of the tubes. If ow is interrupted, shutdown 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 ow is animated to indicate
ow through the condenser. All setpoints relating 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 Variable ORIFICE CONTROL screen, accessed from
the CONDENSER screen in SERVICE access level, dis-
plays all of the applicable Variable Orice control param-
eters and allows a Service Technician to program the Delta
P setpoint. The Low Evaporator Pressure and Superheat
Override LED’s are located on this screen. A view of the
liquid ow piping to the chiller condenser, along with the
solenoid ow control valve, is shown. The following can
also be performed through this screen:
Display Only:
• Condenser Pressure
• Evaporator Pressure
• Delta P (Condenser – Evaporator)
• Discharge Temperature
• Condenser Saturation Temperature
• Superheat Temperature
• Low Evaporator Override (LED)
• Superheat Override (LED)
Programmable:
• Delta P Setpoint
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 conguring the optional Hot Gas Bypass. From this
screen you can view the following:
Display Only:
• Differential Oil Pressure
• Oil Temperature
• Discharge Temperature