Install Instructions

2 Venting
22
2. Outdoor installation venting
Units are self-venting and can be used outdoors when installed
with the optional outdoor systems. The air inlet cap mounts
directly to the unit and covers the combustion air opening.
Gasketing is supplied to seal the unit vent pipe to prevent water
leakage. The flue requires a 36" vent pipe and cap installed to
the heater outlet.
Combustion air supply must be free of contaminants (see
Combustion and Ventilation Air, page 12). To prevent
recirculation of the flue products into the combustion air inlet,
follow all instructions in this section.
NOTICE
Before installing a venting system, follow
all venting clearances and requirements
found in the Venting, General Information
section, page 16.
⚠ WARNING
Only install outdoor models outdoors
and only use the vent systems supplied
by the appliance manufacturer. Personal
injury or product damage may result if
any other cap is used or if an outdoor
model is used indoors. Properly install all
covers, doors and jacket panels to ensure
proper operation and prevent a hazardous
condition.
Keep venting areas free of obstructions. Keep area clean and
free of combustible and flammable materials. Maintain a
minimum clearance of 3'' (76mm) to combustible surfaces and
36" clearance to the rear of the unit for outdoor installations.
To avoid a blocked air inlet or blocked flue condition, keep the
air inlet, flue outlet, and drain slot clear of snow, ice, leaves,
debris, etc.
Outdoor vent/air inlet location
Do not install outdoor models directly on
the ground. You must install the outdoor
unit on a concrete, brick, block, or other
non-combustible pad.
Do not locate unit so that high winds
can deflect off of adjacent walls, buildings
or shrubbery causing recirculation.
Recirculation of flue products may cause
operational problems, bad combustion or
damage to controls. Locate unit at least
3 feet (0.91m) from any wall or vertical
surface to prevent wind conditions from
affecting performance.
Multiple outdoor unit installations require
48'' (1.22m) clearance between each vent
cap. Locate the outdoor cap at least 48''
(1.22m) below and 48'' (1.22m) horizontally
from any window, door, walkway or gravity
air intake.
Locate the unit at least 10 feet (3.05m) away
from any forced air inlet.
Locate the unit at least 3 feet (0.91m) outside
any overhang.
CAUTION
CAUTION
Clearances around outdoor installations can
change with time. Do not allow the growth
of trees, shrubs or other plants to obstruct
the proper operation of the outdoor vent
system.
CAUTION
Installation & Service Manual
NOTICE
Do not install in locations where rain from
building runo drains will spill onto the
unit.
CAUTION
A minimum of 3 feet must be maintained
at all times from outdoor air vent cap
surfaces to combustible construction and/or
materials.
Do not install in pit or below grade.
CAUTION