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Operation of Furnace During Construction

CAUTION:

Failure to follow these instructions will void the
factory warranty and may signifi cantly 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.

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 fi lter in the return air system with
no by-pass air. The fi lter 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 fi lter 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 qualifi ed
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 fi nal 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.

GENERAL INSTRUCTIONS

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 in a confi ned space, it is required

that the necessary combustion air come from the
outdoors by way of attic, crawl space, air duct, or direct
opening. See Installation in a Confi ned Space section
(pages 7 - 8) 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