Installation manual

19Pumped Refrigerant System Operation and Maintenance
General Configuration
The configuration options are set during the commissioning of the RDU(s) and cooling modules (CMs)
in the group.
Note:
The Admin Password is required before configuration changes can be entered.
RDU configuration
Path: Main > RDU > Configuration
RDU ID. Enter an identifier number for the RDU.
Start-up Dly. Enter a value for the delay. The start-up delay begins when the unit is started and
initialized. The RDU cannot begin operation until this delay expires. Use the start-up delay to restart
equipment sequentially after a scheduled downtime or a power outage.
Pump Changeover. The accumulated runtime before the pump is switched over to the lag pump. Enter
a value for the Pump Rotation Time in Days. If set to zero, the function is disabled.
Stop On Leak. When set to Yes, the RDU will stop if a Water Detection Fault activates. Set to No to
disable the RDU from stopping if a leak is detected.
Note: The leak sensor (APC part number AP9325) is optional.
Note: There are several alarms that will cause the cooling unit to enter Stop mode:
• Water Detection Fault (when Stop On Leak is set to Ye s)
• Persistent Receiver Pumped Dry
• Pump 1 Fault (must occur with Pump 2 fault to initiate Stop mode.)
• Pump 2 Fault (must occur with Pump 1 fault to initiate Stop mode.)
• Persistent Pumps Vapor Locked
See “Alarm messages and suggested actions” on page 1 for more information on alarms.
CAUTION
HAZARD TO EQUIPMENT OR PERSONNEL
All work must be performed by American Power Conversion (APC
®
) by Schnieder Electric
authorized personnel.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.