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59
Menu 1 – Water Regulating Valve (WRV) Setup
WRV Water Regulating Valve Setup Screen
An electric condenser water-regulating valve is standard on all chillers with a water-cooled condenser. The valve is
a butterfly type valve with a modulating actuator and is located in the condenser water piping at the outlet of the
condenser. The chiller PLC controls the valve actuator using a high-side refrigerant pressure signal from a pressure
transducer. The valve regulates the flow of water through the condenser in order to maintain the discharge
pressure set point.
Figure 40 – WRV Setup Screen
Table 27 – WRV Setup Parameters
Menu Item
Description
Default
Value
Mode
In Auto Mode, the control system adjusts the valve for optimum performance. In
manual mode, the manual mode value is the output to the valve at all times.
AUTOMATIC
Discharge Setpoint
Discharge Setpoint Value
340 PSIG
Low Temp Setpoint
Low temp setpoint relating to low percent setpoint – (During the start sequence)
45°F {7°C}
High Temp Setpoint
High temp setpoint relating to high percent setpoint – (During the start sequence)
85°F {29°C}
Low Percent Setpoint
The low percent value during startup if the condenser water temperature is at or
below the low temp setpoint
20%
High Percent Setpoint
The high percent value during startup if the condenser water temperature is at or
above the high temp setpoint
50%
Kp
Proportional PID value
20
Ti
Integral PID value
1000
Td
Derivative PID value
50