6
UNIT LOCATION
IMPORTANT NOTE:
Remove wood shipping rails prior to
installation of the unit.
All Installations:
•
For proper flame pattern within the heat exchanger and
proper condensate drainage, the unit must be mounted
level.
•
The flue outlet hood must be at least 12 inches from
any opening through which flue gases could enter a
building, and at least three feet above any forced air
inlet located within ten feet. The economizer/manual
fresh air intake/motorized fresh air intake and combus-
tion air inlet mounted on the unit are not affected by this
restriction.
• To avoid possible corrosion of the heat exchanger, do
not locate the unit in an area where the outdoor air (i.e.
combustion air for the unit) will be frequently contam
-
inated by compounds containing chlorine or fluorine.
Common sources of such compounds include swim-
ming pool chemicals and chlorine bleaches, paint
stripper, adhesives, paints, varnishes, sealers, wax-
es (which are not yet dried) and solvents used during
construction and remodeling. Various commercial and
industrial processes may also be sources of chlorine/
fluorine compounds.
• To avoid possible illness or death of the building occu-
pants, do NOT locate outside air intake device (econ
-
omizer, manual fresh air intake, motorized fresh air
intake) too close to an exhaust outlet, gas vent termi
-
nation, or plumbing vent outlet. For specific distances
required, consult local codes.
•
Allow minimum clearances from the enclosure for fire
protection, proper operation, and service access (see
appendix). These clearances must be permanently
maintained.
•
The combustion air inlet and flue outlet hoods on the
unit must never be obstructed. If used, do not allow the
economizer/manual fresh air damper/ motorized fresh
air damper to become blocked by snow or debris. In
some climates or locations, it may be necessary to ele-
vate the unit to avoid these problems.
• When the unit is heating, the temperature of the return
air entering the unit must be between 50° F and 100° F.
• Units manufactured on or after May 1, 2017 are not
permitted to be used in Canada for heating of buildings
or structures under construction.
Ground Level Installations Only:
• When the unit is installed on the ground adjacent to
the building, a level concrete (or equal) base is rec
-
ommended. Prepare a base that is 3” larger than the
package unit footprint and a minimum of 3” thick.
•
The base should also be located where no runoff of
water from higher ground can collect in the unit.
Outside Slab Installation
Rooftop Installations Only:
NOTE:
To ensure proper condensate drainage, unit must be
installed in a level position.
• To avoid possible property damage or personal injury,
the roof must have sufficient structural strength to carry
the weight of the unit(s) and snow or water loads as
required by local codes. Consult a structural engineer
to determine the weight capabilities of the roof.
•
The unit may be installed directly on wood floors or on
Class A, Class B, or Class C roof covering material.
•
To avoid possible personal injury, a safe, flat surface for
service personnel should be provided.
Rooftop Installation
