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withthe manufacturer's instructions. A copyof the
installation instructions shall r emain w iththeappliance
orequipment atthecompletion o ftheinstallation.
Combustion
Air Quality
CAUTION:
Combustion
air
must
not
be drawn
from
a
corrosive
atmosphere.
To maximize heat exchanger life, the combustion
air
must be free of chemicals that can form corrosive acidic
compounds in the combustion gases. The recommended
source of combustion air is to use outdoor air. However,
the use of indoor air in most applications is acceptable
except as listed:
If the furnace is installed as a single pipe installation
in a confined space, it is required that the necessary
combustion air come from the outdoors by way of attic,
crawl space, air duct, or direct opening. For Installations
in confined spaces, see pages 7 - 10 for combustion
air requirements.
Installations in these locations may require outdoor air
for combustion, due to chemical exposures:
Commercial buildings
Buildings with indoor pools
Furnaces installed in laundry rooms
Furnaces installed in hobby or craft rooms
Furnaces installed near chemical storage areas
Exposure to the following substances in the combustion
air supply may require outdoor air for combustion:
Permanent wave solutions
Chlorinated waxes and cleaners
Chlorine based swimming pool chemicals
Water softening chemicals
De-icing salts or chemicals
Carbon Tetrachloride
Halogen type refrigerants
Cleaning solvents (perchloroethylene)
Printing inks, paint removers, varnishes, etc.
Hydrochloric Acid
Cements and glues
Antistatic fabric softeners
Masonry acid washing materials
Operating gas furnaces in construction environments can
cause a variety of problems with the furnace. Proper use
of commercial portable space heating equipment during
construction
is recommended. This gas furnace may be
used during construction
if it is not in violation of any
applicable codes and the following criteria are met:
The installation
must meet all applicable codes. The
furnace must be permanently
installed according to
the instructions
supplied with the furnace including
electrical supply, gas supply, duct work and venting. The
furnace must be controlled by a thermostat
properly
installed according to the instructions supplied with the
furnace and thermostat. The installation must include
a properly installed filter in the return air system with
no by-pass air. The filter must be inspected frequently
and replaced when necessary.
Combustion
air must be supplied from outside the
structure
and located
such that dust and gases
from construction
activity are not introduced into the
combustion system.
Provisions must be made to insure that condensate
does not freeze in the furnace or condensate drain lines
during operation and during idle times; for example,
overnight if turned off. (Condensing furnaces only)
Before occupying
the structure:
The filter must be
replaced or cleaned, the duct work must be inspected
and cleaned of any construction debris, and the furnace
must be cleaned and/or repaired if found to be dirty,
damaged, or malfunctioning
in any way by a qualified
HVAC technician. The furnace shall be inspected and
approved
by applicable
local authority
even if this
requires redundant inspections.
Serial numbers for furnaces used during construction
must be submitted
in writing
(fax and email also
acceptable). This information will be used to track the
long-term affects of the use during construction
on
furnaces. Proof of this submittal shall be available for
the final inspection of the furnace prior to occupancy.
This furnace
is designed
to operate with return air
temperatures
in ranges normally found in occupied
residences, including setbacks. Minimum continuous
return temperature
must not be below 60 ° F (15 ° C).
Occasionally a temporary return temperature of 55 ° F
(12 ° C) is acceptable. However, operation with a return
temperature below 55 ° F (12 ° C) is not allowed.
Operation
of Furnace
During
Construction
CAUTION:
Failure
to follow
these
instructions
will void the
factory
warranty
and may significantly
reduce
the life or the performance
of the furnace,
and/
or result
in other
unsafe
conditions,
it is the
responsibility
of the
installing
contractor
to
insure these
provisions
are met.
Heating
Load
This furnace should be sized to provide the design heating
load requirement. Heating load estimates can be made
using approved methods available from Air Conditioning
Contractors of America (Manual J); American Society of
Heating, Refrigerating, and Air Conditioning Engineers;
or other approved
engineering
methods. Excessive
oversizing
of the furnace
could
cause the furnace
and/or vent to fail prematurely. The ductwork should
be appropriately sized to the capacity of the furnace to
ensure its proper airflow rating.
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