The selection options for Secondary Variable Speed Chill Water Pumping are:
-
Number of Pumps: This option is used to select the number of secondary CHW pumps.
-
One Pump
-
Two Pumps
-
Three Pumps
-
Four Pumps
-
Five Pumps
-
Six Pumps
-
Seven Pumps
-
Eight Pumps
-
-
Pump Rotation (Runtime): This option automatically changes pump staging order based on runtime (equal runtime rotation strategy).
-
Pump Status: This option monitors the status of the pump.
-
Loss of Status Strategy
-
Automatic Restart
-
Manual Restart
-
Unit Reset Switch (BI)
-
-
-
-
Alarm Management
-
Lockout Switch
-
Lockout Switch (BI)
-
-
Frequency Converter Fault
-
Automatic Restart
-
Manual Restart
-
Unit Reset Switch (BI)
-
-
-
Belt Alarm
-
Automatic Restart
-
Manual Restart
-
Unit Reset Switch (BI)
-
-
-
-
Blocking Protection: This option provides monitoring of the command to a motor (typically a pump). If the command is off for an extended period of time (for example, 7 days), the motor starts for a short time (for example, 30 seconds). This feature prevents blocking (that is, it prevents the motor from seizing up).
-
Add Bypass Valve: This option adds a bypass valve to further control the loop differential pressure while the secondary pumps are running at minimum speed. This allows you to respan the AO for the bypass valve (CHWBYPV-O) to control from zero (fully opened) to the minimum pump speed (fully closed).
If the Bypass Valve with Diff Pressure Sensor is selected, Secondary Variable Speed Chill Water Pumping cannot be selected.