Installing Horizontal Units - York YAFS012 Installation Manual

AFFINITY SINGLE & DUAL CAPACITY SERIES INSTALLATION MANUAL
General Installation Information cont.

Installing Horizontal Units

Remove and discard the compressor hold down shipping bolt
located at the front of the compressor mounting bracket prior to
setting the unit in place. Horizontal units are available with side
or end discharge. Horizontal units are normally suspended from a
ceiling by four or six 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 in Figure 3.
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. To
allow filter access, one bracket on the filter side should be installed
180° from the position shown in Figure 3. The unit should be
Figure 2: Horizontal Unit Mounting
Threaded Rods
Flexible Duct
Collar
Insulate supply
plenum and use
To Line
at least one 90
O
Power
elbow to
reduce noise
To
Thermostat
Electrical
Disconnect
Line Voltage
Building Water Loop
pitched approximately 1/4-inch towards the drain in both directions
to facilitate the removal of condensate. Use only the bolts provided
in the kit to attach hanger brackets. The use of longer bolts could
damage internal parts.
Some residential 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.
Hanging
Brackets
(Included)
Hose
Kits
6
CAUTION: Do not use rods smaller than 3/8-inch
diameter since they may not be strong enough
to support the unit. The rods must be securely
anchored to the ceiling.