JOHNSON CONTROLS
28
FORM 155.21-O1 (615)
EVAPORATOR / ABSORBER SCREEN
Overview
This screen displays a cutaway view of the chiller
evaporator and absorber. All setpoints relating to the
evaporator side of the chiller are maintained on this
screen. Animation of the evaporation process indicates
whether the chiller is presently in a
RUN
condition.
Display Only
Evaporator - Chilled Liquid Temperature
Displays the returning, leaving and setpoint chilled
liquid temperatures in the evaporator.
Evaporator - Refrigerant
Displays the refrigerant temperature in the evaporator.
Absorber - Cooling Liquid Temperature
Displays the returning cooling liquid temperature to the
absorber.
Stabilizer & Unloader Valve
Displays the present position of stabilizer (2SOL) and
unloader (3SOL) solenoid valves.
Refrigerant Level Switches
Displays the present positions of 1F and 3F refrigerant
level switches.
Programmable
Leaving Chilled Liquid Temperature Setpoint
Access Level Required:
OPERATOR
This value allows the user to define the Leaving Chilled
Liquid Temperature that is to be maintained by the chill
-
er. It is programmable over the range of 40°F (4.4°C)
to 77°F (25°C). A remote device can provide an analog
signal (0-10VDC or 115PWM) in Analog Remote, or
PWM signal in digital remote mode that changes the
setpoint by creating an offset above the operator pro-
grammed base Leaving Chilled Liquid Temperature
setpoint. This offset may be defined as 10 or 20°F above
the base setpoint.
Range: 40.0°
F - 77.0
°F (4.4°C-25°C)
Default: 42.0°F (5.5°C)
Warning Reset
Access Level Required:
SERVICE
This soft key allows the technician to clear the warning
message when in SERVICE access.
LD13813
FIGURE 6 -
EVAPORATOR / ABSORBER SCREEN
OptiView Control Center
