APC Condenser 2 Fan Installation Manual download pdf (Page 26)

InRow RD 10 kW Air Cooled Operation and Maintenance18

Type. Set the rack deployment strategy for the cooling units of this cooling group:

• Spot: The cooling unit is used as a stand-alone unit.

• In-Row: Air flow is not ducted. Hot-aisle air is cooled and the cooled-air supply is shared by all

loads in the row.

• RACS (Rack Air Containment System): Air flow in the enclosure is controlled by a ducting

system fitted to the enclosure.

• HACS (Hot Aisle Containment System): Air flow in the room is controlled by enclosing the hot

air aisle. The loads share an enclosed common hot aisle.

Capacity Ctrl. Set the capacity control of the cooling unit:

• Disc (Discrete): The cooling unit operates as a room air conditioner. The evaporator fan speed will

remain constant at the user setting and the compressor will cycle on and off to maintain the cool

setpoint.

Note: The Disc mode is only available in a Spot cooling configuration.

• Prop (Proportional): The cooling unit matches the cooling output to the load demand. This is

accomplished using hot gas adjustment and fan speed control. Load demand is determined by the

cool setpoint and the temperature sensor at the rear of the cooling unit (in Spot configurations) or

the temperature sensor at the front of the load rack (in In-Row and RACS configurations).

Fan Cntrl. This selection allows air flow to be controlled automatically by the cooling unit or manually

by user-selected fan speed preference. This property only applies to Spot (Proportional), InRow, RACS

and HACS deployments.

• Auto: Air flow is automatically controlled by the unit.

• Manual: the air flow is fixed to the value of the Fan Speed Preference property. See page 19 for

more information.

Identify the cooling unit

Path: Main > Set Identification

The Set Identification menu contains settings that identify the name and location of the cooling unit.

Name. Assign a Name of up to 40 alpha-numeric characters to this cooling unit.

Location. Enter the Location, up to 40 alpha-numeric characters, of the cooling unit.

Note: Only the first 19 characters (of the 40 that are possible to enter) will display on the

display interface. You must use Telnet , the Control console or the Web to access all 40

characters. See page 38 for more information.

Configure Modbus

Path: Main > Configure Modbus

Use the Configure Modbus menu to set up communication between the cooling unit and the building

management system.

Modbus. Enable or Disable the Modbus communication protocol.

Target Id. Each Modbus device must have a unique target identification number. Enter a unique

number, from 1 to 247, for this cooling unit.

Baud Rate. Choose either 9600 bps or 19200 bps.

Fixed settings: 8 data bits, no parity, 1 stop bit. These settings cannot be modified.

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APC Condenser 2 Fan Installation Manual Page 26