The selection options for Zone Loop Control are:
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Number of Zones
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One
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Two
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Three
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Four
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Five
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Six
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Seven
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Eight
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Number of Pumps for Each Zone
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None
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One
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Two
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Variable Speed
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Pump Status
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Loss of Status Strategy
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Automatic Restart
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Manual Restart
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Unit Reset Switch (BI)
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-
-
-
Alarm Management
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Lockout Switch
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Lockout Switch (BI)
-
-
Motor Overload Tripped
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Automatic Restart
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Manual Restart
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Unit Reset Switch (BI)
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-
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Frequency Converter Fault
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Automatic Restart
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Manual Restart
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Unit Reset Switch (BI)
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-
-
Belt Alarm
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Automatic Restart
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Manual Restart
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Unit Reset Switch (BI)
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-
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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).
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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).
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Rotate in an Attempt to Balance: This option allows you to choose your rotation strategy which changes chiller staging for all chillers that have the same COP value based on the selections below.
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Runtime: This option automatically changes chiller staging order based on runtime (equal runtime rotation strategy).
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Start/Stops: This option automatically changes chiller staging order based on the number of starts and stops (minimize starts and stops rotation strategy).
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-
-
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Mixing Valve for Each Zone
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Control Sensor
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Supply
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Return
-
-
Setpoint Strategy
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Constant Setpoint
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Water Setpoint Reset by OA-T
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Water Setpoint Reset by ZN-T
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Cascaded Water Setpoint Reset by ZN-T and OA-T
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