Upflow Units - Data Aire gForce Ultra User Manual

and local codes permit, the unit can be placed directly on top with cutouts made for the
discharge openings.
Verify that the raised floor has been properly sized for the unit's airflow and the room is
free of airflow restrictions. Perforated floor tiles in the raised floor should ensure
minimal pressure loss. The raised floor must provide a minimum of 12" (305 mm)
clearance. Ensure that there is adequate clearance above the unit for service, such as
replacing filters. Optional plenums are available for downflow unit ducting.
There may be additional support required in the form of adjustable jackstands. These
are adjustable, threaded leveling rods which support the unit in each of the corners and
in the center on longer length units. Tighten the locknuts provided with each
jackstand. The base plate can rest on the floor or on vibration pads.
Floorstands are also a way of supporting the unit. These are ordered to the height of
the raised floor with leveling rods to allow adjustment. The floorstand has lips in each
corner to align with the unit which is placed on top. It is recommended that the unit
frame be bolted or screwed to the floorstand from below. Local building codes may
dictate this procedure. After installation, the raised floor is typically built around the
unit.
The raised floor serves as the distribution plenum for air on downflow units. Cables,
piping, wiring raceways, inadequate floor height and any other restrictions can inhibit
proper airflow. Care should be taken to avoid restrictions.

2.5.2 Upflow Units

Upflow units will typically be supported by vibration isolation pads and/or floorstands
which may also include leveling screws. An air discharge plenum may be factory
provided which ships loose and must be attached at the top of the unit frame. For in-
room applications with supply and return grilles, several feet of clearance must be
maintained at the intake and discharge of the unit.
Alternately, an air distribution plenum must be field fabricated with supply grilles to
distribute the air. Units are shipped with Electronically Commutated (EC) motors often
referred to as "plug fans". Fan speed is factory set based on order. Fan speed can be
changed in 1% increments through the unit's microprocessor controller, Data Alarm
Processor 4™ (dap4™) by several different methods. See the dap4™ User Manual for
details and recommended settings.
10-2014 gForce User Manual ● 13