APC ACRD200 Installation Manual download pdf (Page 19)

11InRow RD Fluid Cooled Operation and Maintenance

General Configuration

The cooling group configuration options are set during the commissioning of the cooling units in the

cooling group.

Caution: This procedure must be performed by APC authorized personnel only. Changing

the settings incorrectly can cause malfunctions to your cooling unit.

Cooling unit configuration

Path: Main > Configure Unit >General

Use the General menu to set the start-up delay, idle on leak, and refrigerant fill settings.

Start-up Dly (Start-up Delay). The delay begins when the cooling unit is started and initialized. The

cooling unit cannot begin operation until this delay expires. Use the start-up delay to restart equipment

sequentially after a scheduled downtime or a power outage.

Idle On Fail. When set to Yes, the cooling unit will enter idle mode if the cooling unit is unable to

supply conditioned air. Set to No to disable the cooling unit from entering idle mode if a Cooling Failure

is detected.

Idle On Leak. When set to Yes, the cooling unit will enter idle mode if a Water Detection Fault

activates. Set to No to disable the cooling unit from entering idle mode if a leak is detected.

Note: The leak sensor (APC part number AP9325) is optional.

Note: There are three alarms that will cause the cooling unit to enter idle mode when Idle On

Leak and Idle on Fail are set to Yes:

• Water Detection Fault

• Condensate Pump Fault

• Cooling Failure

See “Alarm messages and suggested actions” on page 24 for more information on alarms.

Refrig Fill. Set to Start to add refrigerant to the system. This setting turns the compressor on and sets

the fans to maximum speed until the compressor suction pressure drops below 50 psig for two minutes,

twenty minutes elapse, or the property setting is changed to Abort.

Caution: The Refrig Fill setting is intended only for charging the unit with refrigerant.

Role Override. Set to ON, forces the cooling unit to be the Primary cooling unit in the group. Set to

Auto, allows the system to choose the role of the cooling unit. Choose ON if you have Runtime

Balancing enabled and you DO NOT want a particular unit in the group to become a backup unit. See

page 14 for more information.

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APC ACRD200 Installation Manual Page 19