Table of Contents
Advertisement
Operating Procedures
Table 11. EXV control options (continued)
Condenser Control
The control system can control external devices and any
devices that are local to the chiller. Two of the features are:
1. Condenser Valve Control
2. Condenser Fan Control
Note: Although available in the software, this is not an
option available on the Thermafit TACW. However,
this control can be used on a module-dedicated
cooling tower.
Condenser Valve Control
The condenser valve can be a device attached to the chiller
or just as simple as a device connected to the BMS. The
controller provides a signal reference that is PID driven to
control the condenser inlet temperature to a defined
setpoint value. The chiller control system provides 2
options as selected from the HMI configuration page – HMI
Condenser Control:
36
Screen
ArcticCool EXV Setup Page:
•
Access: Main Menu > Devices Menu > EXV button > Setup button.
•
PID Loop constants: P-Gain and Integral
–
Negative Gain indicates reverse acting.
•
Minimum Setpoint (for Sub-Cooling mode only).
•
Master Setpoint display:
–
Adjustable Setpoint for all the modes but Sub-Cooling.
–
Maximum Setpoint (for Sub-Cooling mode only).
Circuit Common Parameters:
•
Max and Min operational valve values.
•
Minimum Setpoint.
•
Start Position and Time.
•
Sensor Failover Position.
•
Low-Lift control parameters – Gain, Integral, Setpoint, Minimum Output
Command.
•
Resets:
–
SST
–
Subcooling
–
Gain (no integral)
•
External Sensors:
–
Chillers works by compressor sensors by default. System can be set
to use independent temperature and pressure sensors.
Disabled
This option indicates no controllable condenser valve
exists.
ArcticCool Control
This option requires ArcticCool T3C Companion Controller.
The T3C Companion works with the ArcticCool Main
Controller; they share information including Inputs and
Outputs. The Companion cannot work as a stand-alone
controller because it does not have the inputs and outputs
to sustain the functionalities built in. It is designed as a
companion relying on the Main Controller.
Condenser Valve Control main page:
1. Condenser Valve Control:
Controls
ARTC-SVX007A-EN
Advertisement
Table of Contents
