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problem the casters may be inserted directly into the bottom of the 1" tubular steel corner posts at
the bottom of the unit.
Warning: Improper lifting or moving of equipment may result in damage to decorative
doors, panels or frame members.
1.4 Locating the Unit
When installing the unit, sufficient space must be allowed for airflow clearance, wiring,
plumbing, and service access. It is recommended that each side and front have a clearance of at
least 30" to allow the doors to swing open and for servicing the unit.
The doors on some sides may not require as much service clearance. Refer to the particular
unit component breakdown drawings for assistance. Rear clearance is not required, but 1" to 2" of
clearance is suggested.
For the best air distribution, the unit should be centered against the longest wall, as close to
the heat load as possible, unless the unit is ducted. The unit should not be placed near any corner
of the room or at the end of a long, narrow room. Multiple units should be evenly spaced, as far
apart as possible.
Note to Installing Contractor: Condensation formation and frequent humidifier flushing
are normal functions of this equipment. Proper drain connections must be made to ensure
proper removal. Unit will require water connections for condensate removal and possibly
for humidifier makeup water, chilled water and/or hot water. Installation of units above
equipment that could sustain water damage should be avoided.
1.4.1 Downflow Units
Downflow units will typically sit on an elevated flooring system known as a raised floor. The
unit discharges air downward which pressurizes the raised floor and channels upward through
perforated floor tiles. Location and quantity of perforated tiles will dictate proper air distribution. If
the raised floor is strong enough to support the unit and local codes permit, the unit can be placed
directly on top with cutouts made for the discharge openings.
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 baseplate can rest on
the floor or on vibration isolation pads.
Floorstands are also a way of supporting the unit. These are ordered to the height of the 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.
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