APC ACRD101 Contacts, Cooling Group Configuration, View the state of input and output contacts

Contacts

View the state of input and output contacts

Path: Main > Configure Unit > Discrete I/O

Each cooling unit supports a user-defined input contact and a user-defined output contact. Each contact monitors a sensor and responds to changes in the state of the sensor (open or closed).

Input State. Indicates the actual state of the input contact (Open or Closed). A cooling unit is On when the state is normal and in Standby when the state is not normal.

Output State. Indicates the actual state of the output contact (Open or Closed). An alarm will cause the output contact to change from the normal state.

OHE Input State. Indicates the actual state of the input contact (Open or Closed) for the Outdoor Heat Exchanger.

Edit the normal state of input and output contacts

Path: Main > Configure Unit > Discrete I/O > Normal State

Configure the input contacts to cause alarm conditions based onthe user-defined normal state. Output contacts can map internal alarms and events to outside devices.

Input Norm. Set the normal state of the contact (Open or Closed). The cooling unit changes its operating mode to Closed when the actual state differs from the normal state.

Output Norm. Set the normal state of the contact (Open or Closed). If the state of an alarm or event mapped to this contact changes from the normal state, the contact also changes state.

Outpt Src. Define the type of output source (alarm), either Any Alrm or Critical, that causes the output to change from its normal state.

OHE In Norm. Set the normal state of the contact (Open or Closed) for the Outdoor Heat Exchanger.

Cooling Group Configuration

Use the cooling group configuration settings to add cooling units to the group and to define group operation.

Caution: This procedure is to be performed by APC authorized personnel only. The settings in the Configure Group menu are defined by APC authorized personnel when the cooling group is commissioned.

Configure the cooling group

Path: Main > Configure Group

The Configure Group menu contains settings that identify the number of cooling units installed in this cooling group and the physical arrangement of those cooling units.

Num Units. Enter the number of cooling units in this cooling group. Up to 12 cooling units can be joined together to work as a single cooling group.

InRow RD 10 kW Air Cooled Operation and Maintenance 17