Setting Of The Unit; Down Flow Units; Upflow Units - Compu-aire System 2100 Series Installation And Operation Manual

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Install unit on leveled solid floor that can support the unit weight and vibrations.
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Securely mount the unit with floor and brace it with wall if needed.
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Install the unit closer to the largest heat load.
Air distribution is very important for proper unit operation. Air balancing is required to obtain design
CFM at site. Fan speed can be adjusted from the controller as needed. Several feet of clearance
must be maintained between the supply air and return air intake of the unit. In existing room, the
unit supply air shall be directed towards the air intake side of the heat load. Always locate air intake
of the servers and any other heat load in the cold aisle for efficient air distribution. The unit supply
air shall never be directed towards the exhaust fan of any heat load in the room.

6.1 Setting of the Unit

Locate the unit so the desired clearances are provided, paying special attention to floor height for
downflow units. Make sure that piping under floor does not interfere with the discharge air of the
unit. Unit can sit on an elevated flooring while remains fully accessible. Floor stand or other support
maybe used to further support the unit.
After moving the unit to the desired location, the system needs to be leveled and anchored to the
floor as directed by the building design engineer, typically using wedge anchors. Prior to anchoring
the unit to the floor, verify locations for Chilled Water Supply and Chilled Water Return line
connections, drain line connection as well as the electrical power input locations are matching with
unit location requirement. Proper electrical supply power is an absolute necessity as the unit is
designed specifically for the requirements on the nameplate. All knock-out shall be provided by
others in the field.
The unit is designed with draw-thru air pattern with negative pressure inside. The condensate drain
connection with a proper p-trap is factory installed to prevent the water is drawn back by the fans.

6.1.1 Down Flow Units

Down flow units are required to be installed on floor stands. Verify that the raised floor has been
properly sized for the design air flow. The raised floor shall be free of air flow restrictions. The height
of the adjustable floor stand can be raised or lowered through the use of the adjusting rods. The
supply air shall be directed into the cold aisles and avoid any short cycling of cold air back to the unit
return air. Floor stand height for down flow models shall be selected based on unit CFM, fan size
and static pressure requirement. The floor stand must be securely mounted and all locknuts must be
tightened to assure rigidity. See provided floor stand drawing for installation detail.

6.1.2 Upflow Units

The unit may be placed directly on the sub floor. The up flow unit may have duct connection or an
optional discharge air plenum. Typical up flow unit has front return configuration but optional rear
return with filter box is available.
The most desirable location to maintain appearance is against a wall. All incoming pipes and wires
can be fed to the unit directly through the wall. If the room is equipped with the raised floor, the
unit can be located anywhere
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