Lennox VPB Series, Installation & Operation Instructions

Page: 8 / 48

8
Clearances from Obstructions
• Allow adequate air flow clearance on all sides of
the unit. See Figure 1 and this section.
• Allow at least 39 in. (991 mm) clearance in front
of the unit for maintenance and service access.
The outdoor unit service access is via hinged
service doors that swing open in front of the unit.
Figure 2.
Front Side
>39”
(991 mm)
Figure 2. Maintenance & Service Clearance
NOTICE
Drawings in this manual are for illustrative purposes
and should not be used as a template for fabricating
field-supplied accessories or apparatuses. Consider
the environment in which this unit is being installed and
make necessary adjustments to ensure safe operation.
Local codes prevail.
• Perimeter obstructions that are 32 in. (813
mm) taller than the top of the outdoor unit
require a field supplied air discharge duct
to avoid recirculation of discharge air.
The discharge duct should be installed to at
least the height of the surrounding obstructions
(for ex. walls) to ensure that discharge air
goes over the height of the obstruction.
Ensure that the static capabilities of the outdoor
unit are not exceeded. Figure 3.
>32”
(813 mm)
Figure 3. Perimeter Obstructions
• Allow at least 120 in. (3048 mm) clearance above
the unit. If an obstruction above the unit does not
allow for adequate clearance, a field-supplied
discharge duct is required. The discharge duct
should be installed in such a way as to ensure
that discharge air goes beyond the obstruction
and does not cause recirculation of discharge air.
Ensure that the static capabilities of the outdoor
unit are not exceeded. Figure 4.
Figure 4. Obstructions Above the Unit
>120”
(3048 mm)
Rear Side
Front Side Rear Side
Front Side Rear Side
CAUTION
!
In order to avoid injury, take proper precaution
when lifting heavy objects.
Take care when using a sling to lift the unit for
in stallation. The unit center of gravity is not at
its physical center.