Installation guide

_ Installation Instructions Single Package Air Conditioners I
Downflow Conversion
These units are shipped ready for horizontal operation but
are adaptable to downflow use. To convert to downflow
use, follow these steps:
1. Remove the blockoff plates found in the return air
compartment and the supply air compartment (see
FIGURE 3.
NOTE: Blockoff plate in the supply air compartment only
contains one screw. If reinstalling plate, back part of plate
MUST fit into mating dimples on flange. To reinstall, slant
plate into dimples, then put plate into position and fasten
with screw.
2. Install the removed plates on the horizontal return
and supply air openings.
NOTE: It is the installer's personal responsibility to follow
all local codes and ordinances and instructions contained
herein, as well as instructions included with accessory
items when installing unit. It is the installer's personal re-
sponsibility to locate directions for installation of this unit
and any or all accessories. Manufacturer is NOT responsi-
ble for improper installation practices.
3. Install unit on the appropriate roof curb.
Blockoff Plate
FIGURE 3 (Return Air Compartment)
Condensate Drain
The condensate drain outlet is a 3/4" (19.1mm) threaded
female PVC connection located at the bottom of the unit to
the left of the electrical access panel (see FIGURE 4). Con-
densate drain outlet MUST be held with wrench when
installing trap and drain line.
The circulating blower and the condenser fan create a neg-
ative pressure on the condensate drain line that will pre-
vent the condensate from draining properly without a trap.
To combat this negative pressure, a field supplied conden-
sate trap that will allow a standing column of water of at
least 2" (50.8mm) MUST be installed. Top of outlet from
trap MUST be at least 1" (25.4mm) below top of outlet from
unit. Install the trap as near to the unit as possible for
proper drainage.
A 3/4" (19.1 mm) drain line MUST be installed if required by
local codes or if location of unit requires it. Run the drain
line to an open drain or other suitable disposal point.
FIGURE 4 I Condensate Drain Information*
Access Panel
* Condensate trap MUST be installed.
80-30-27