25
User Setup – Pump Control
Pump Control Screen
This screen displays pertinent pump status
information for a system with the optional integral
pump controls and provides the ability to change
mode selection.
Note:
Your screen may appear slightly different based on your
actual chiller configuration.
Figure 47 - User Setup – Pumps Screen (Dedicated
Backups)
Figure 48 - User Setup – Pumps Screen (Dual
Standby)
Figure 49 - User Setup – Pumps VFD
User Setup – EEV Control
The electronic expansion valve meters the amount of
refrigerant into the evaporator in the precise
quantity in order to maintain superheat. The
difference between the saturated suction
temperature and the suction line temperature is the
superheat.
Figure 50 - User Setup – EEV Control Setup Screen
Table 12 – EEV Control Setup Parameters
Menu Item
Description
Default Value
Mode
Selection
In Auto Mode, the control system
adjusts the valve to maintain
Super Heat. In manual mode, the
system drives the valve to a fixed
position and holds it there for
service diagnostic purposes.
AUTO
Superheat
Setpoint
The superheat varies depending
on the number of compressors in
operation for the specific
refrigeration circuit.
Only a trained refrigeration
service technician should adjust
these valves.
Tier 1: 15.0
Tier 2: 20.0
Kp
Proportional PID value
0.015
Ti
Integral PID value
100.000
Td
Derivative PID value
0.000
