10
ARBOR BASE SERIES INSTALLATION MANUAL
Installing Horizontal Units
Horizontal units are available with side or end discharge and may
be easily field converted by flipping the blower discharge panel.
Horizontal units are normally suspended from a ceiling by four 3/8
in. diameter threaded rods. The rods are usually attached to the
unit by hanger bracket kits furnished with each unit. Lay out the
threaded rods per the dimensions below. Assemble the hangers to
the unit as shown. Securely tighten the brackets to the unit using
the weld nuts located on the underside of the bottom panel. When
attaching the hanger rods to the bracket, a double nut is required
since vibration could loosen a single nut.
NOTE:
The unit should be pitched approximately 1/4 in. towards
the drain in both directions to facilitate the removal of condensate.
Horizontal Unit Mounting
Use only the bolts provided in the kit to attach hanger brackets.
The use of longer bolts could damage internal parts. Some
applications require the installation of horizontal units on an attic
floor. In this case, the unit should be set in a full size secondary
drain pan on top of a vibration absorbing pad. The secondary
drain pan prevents possible condensate overflow or water leakage
damage to the ceiling. The secondary drain pan is usually placed
on a plywood base isolated from the ceiling joists by additional
layers of vibration absorbing material. Insulate supply plenum and
use at least one 90° elbow and flexible duct collar to reduce noise.
CAUTION: Do not use rods smaller than 3/8 in.
diameter since they may not be strong enough
to support the unit. The rods must be securely
anchored to the ceiling.
Installing Horizontal Units
Summary of Contents for Arbor Base Series
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