7
Figure 3. Suspending Horizontal Unit
AIR FLOW
Secondary Drain Pan
Angle Iron or Unistrut Channel
Front View
End View
Electrical Inlet Clerance
4” (102mm)
Threaded Rod
Supports must not
block service access
Horizontal Application
1. Determine knockouts required for drain line
connections.
2. With access door removed, remove drain line opening
to install drain lines.
3. Set unit so that it is sloped toward the end of the unit
with the drain pan (see figure 12).
4.
A typical horizontal configuration is shown in figure 3.
5. If the unit is suspended, the entire length of the cabinet
must be supported. If you use threaded rod, use a
piece of angle iron or Unistrut channel attached to the
unit (either above or below) to support the length of
the cabinet. Use field-supplied 3/8 threaded nylon-
lock nuts and bolts
no longer than 1/2 inch
to avoid
damaging the coil or filter. Use sheet metal screws to
connect the return and supply air plenums as required.
Horizontal-Left Conversion
1. Remove the coil section panel and the blower section
panel.
2.
Remove the T-2 and T-2B sensors from the sleeves.
The sensors look similar; label the sensors so that
they can be reinstalled to the proper locations.
T-2 Sensor black cable, no overlay.
T-2B Sensor clear overlay on black cable.
3.
Remove the EXV motor from the EXV body.
4. Remove the T1 sensor from the factory-
provided hole in the coil housing.
The sensor will not be positioned back inside of coil
housing.
5. Slide the coil assembly out of the cabinet. Place coil
on sturdy surface.
Figure 4. T1, T-2 and T2B Factory Installed Sensor
Locations
(Vertical Upflow and Horizontal-Right Configuration
Shown)
T-1
T-2
T-2B
Sensor
Description
T1
Return Air (room) Sensor
T2
Middle of Coil Sensor
T2B
Leaving Coil (outlet) Sensor
Table 1. Coil Sensor Identification
IMPORTANT
When removing the coil, there is a possibility of
equipment damage and personal injury. Be careful
when removing the coil assemble from a unit installed
horizontal. The coil may tip into the drain pan once it is
clear of the cabinet. Support the coil when removing it.
IMPORTANT
The horizontal drain pan is not required in vertical upflow
air discharge installations. It must be removed to provide
the best efficiency and air flow.
