APC Fan InRow User Manual

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13InRow SC Operation
Cooling Group Configuration
Use the cooling group configuration settings to add cooling units to the group and to define group
operation.
Caution: APC recommends that this procedure 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.
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.
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), In-Row, and
RACS 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.
Altitude. The height of the cooling unit above sea level. This number is used to estimate the density of
the air and is a factor in calculating the output power. Enter the altitude to the nearest meter or foot for
best results. Entries to the nearest 305 meters (1,000 feet) should be sufficient.

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