5
objects, etc.). If you come in contact with an ungrounded
object, repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new
control from its container. Follow steps 1 through 3 if
installing the control on a furnace. Return any old or new
controls to their containers before touching any ungrounded
object.
T
O
PREVENT
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
DUE
TO
FIRE
,
DO
NOT
INSTALL
THIS
FURNACE
IN
A
MOBILE
HOME
,
TRAILER
,
OR
RECREATIONAL
VEHICLE
.
WARNING
TO THE INSTALLER
Before installing this unit, please read this manual thoroughly
to familiarize yourself with specific items which must be
adhered to, including but not limited to: unit maximum
external static pressure, gas pressures, BTU input rating,
proper electrical connections, circulating air temperature rise,
minimum or maximum CFM, and motor speed connections.
P
RODUCT
D
ESCRIPTION
FEATURES
This furnace is a part of the ComfortNet™ family of products.
The CTK0* ComfortNet thermostat kit allows this furnace to
be installed as part of a digitally communicating system.
The ComfortNet system provides advanced airflow
configuration, enhanced setup features, and enhanced
diagnostics. It also reduces the number of thermostat wires
to a maximum of four. It may be also installed as part of a
non-communicating system using a standard 24 VAC
thermostat.
This product may be installed with the ComfortNet thermostat
and a non-ComfortNet compatible single stage air conditioning
unit. However, this reduces the benefits of the ComfortNet
system as the enhancements will only apply to the furnace.
P
RODUCT
A
PPLICATION
This furnace is primarily designed for residential home-
heating applications. It is NOT designed or certified for use
in mobile homes, trailers or recreational vehicles. Neither
is it designed or certified for outdoor applications. The
furnace must be installed indoors (i.e., attic space, crawl
space, or garage area provided the garage area is enclosed
with an operating door).
This furnace can be used in the following non-industrial
commercial applications:
Schools, Office buildings, Churches, Retail stores,
Nursing homes, Hotels/motels, Common or office
areas
In such applications, the furnace must be installed with the
following stipulations:
• It must be installed per the installation instructions
provided and per local and national codes.
• It must be installed indoors in a building constructed on
site.
• It must be part of a ducted system and not used in a
free air delivery application.
• It must not be used as a “make-up” air unit.
• It must be installed as a two-pipe systems for
combustion air.
• All other warranty exclusions and restrictions apply This
furnace is an ETL dual-certified appliance and is
appropriate for use with natural or propane gas (NOTE:
If using propane, a propane conversion kit is required).
Dual certification means that the combustion air inlet pipe
is optional and the furnace can be vented as a:
Non-direct vent (single pipe) central forced air
furnace in which combustion air is taken from the
installation area or from air ducted from the outside
or,
Direct vent (dual pipe) central forced air furnace in
which all combustion air supplied directly to the
furnace burners through a special air intake system
outlined in these instructions.
Gas furnaces manufactured on or after May 1, 2017 are not
permitted to be used in Canada for heating of buildings or
structures under construction.
In the U.S.A., this furnace may be used as a construction site
heater ONLY if all of the following conditions are met:
• The vent system is permanently installed per these
installation instructions.
• A room thermostat is used to control the furnace. Fixed
jumpers that provide continuous heating CANNOT be
used and can cause long term equipment damage. Bi-
metal thermostats, or any thermostat affected by
vibration must not be used during construction.
• Return air ducts are provided and sealed to the furnace.
• A return air temperature range between 60ºF (16ºC)
and 80ºF (27ºC) is maintained.
• Air filters are installed in the system and replaced daily
during construction and upon completion of construction.
• The input rate and temperature rise are set per the
furnace rating plate.
• The furnace must be installed as a two pipe system,
using 100% outside air for combustion during
construction.
• The furnace heat exchanger, components, duct system,
air filters and evaporator coils are thoroughly cleaned
following final construction clean up by a qualified
person.
• All furnace operating conditions (including ignition, input
rate, temperature rise and venting) are verified by a
qualified person according to these installation
instructions.
• Furnace doors must be in place on the furnace while
the furnace is operating in any mode.
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