Upflow Application - Lennox VVCB Installation Instructions Manual

CAUTION
Do not place items which may be damaged by water
under or around the indoor unit.

Upflow Application

1. The air handler must be supported on the bottom only
and set on a suitable base or a field-supplied support
frame. Securely attach the air handler to the floor or
support frame.
2. If installing a unit in an vertical application, remove the
horizontal drain pan.
3. Place the unit in the desired location and properly
slope the unit, see page 12. Connect the return and
supply air plenums as required using sheet metal
screws.
4. Determine knockouts
connections.
5. With access door removed, remove drain line opening
to install drain lines.
6. If the unit is intended to be used with an "open" return
air path, ensure there is at least 14" of clearance
below the unit.
14" (356 mm)
Floor
Figure 4. Upflow Configuration
required for drain line
Allow Vertical Clearance
from Floor to Unit
Horizontal Application
1. Determine knockouts
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 14.
4. A typical horizontal configuration is shown in Figure 5.
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.
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.
• NOTE - When the unit is installed in horizontal
applications, a secondary drain pan is recommended.
Refer to local codes. Adequate support must be
provided to ensure cabinet integrity. Ensure that there
is adequate room to remove service and access
panels if installing in the horizontal position.
Threaded Rod
Supports must not
block service access
AIR FLOW
Angle Iron or Unistrut Channel
Secondary Drain Pan
Front View
Figure 5. Suspending Horizontal Unit
9
required for drain line
Electrical Inlet Clerance
4" (102mm)
End View