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WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, or repair will expose you
to fiberglass wool dust. Breathing this may cause
lung cancer. (Fiberglass wool is known to the State
of California to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact your
supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
These units must be installed in accordance with all
applicable national and local safety codes.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
If components are to be added to a unit to meet local codes,
they are to be installed at the dealer’s and/or customer’s
expense.
These units are design listed by UL in both the United
States and Canada as follows:
D For use as a forced air furnace with cooling.
D For outdoor installation only.
D For installation on combustible material.
D For use with natural gas or L.P./propane gas only. Use of
L.P./propane gas requires installation of an L.P.
conversion kit, which must be ordered separately.
These units are not suitable for use with conventional
venting systems.
The following safety requirements must also be met when
the 15GCSX units are installed:
1 − Use only with the type of fuel approved for use with this
appliance. Refer to the unit rating plate.
2 − Position, locate and install the 15GCSX unit only as
outlined in these instructions.
3 − Provide adequate clearance around the vent hood as
specified in these instructions.
4 − Do not use an open flame to check for gas leaks. Use a
commercially available soap solution, which has been
designed specifically to check for gas leaks. Refer to
the Gas Supply and Piping section.
5 − Check the unit operation after start−up to make sure
that the 15GCSX is operating within the intended
temperature rise range. The duct system must be
designed to provide an external static pressure within
the allowable range. Refer to the unit rating plate.
Lennox does not recommend the use of 15GCSX units as a
construction heater during any phase of construction. Very
low return air temperatures, harmful vapors and operation
of the unit with clogged or misplaced filters will damage the
unit.
15GCSX units may be used for heating of buildings or
structures under construction, if the following conditions
are met:
D The vent hood must be installed per these installation
instructions.
D A room thermostat must control the furnace. The use of
fixed jumpers that will provide continuous heating is not
allowed.
D The return air duct must be provided and sealed to the
furnace.
D Return air temperature range between 60°F (16°C) and
80°F (27°C) must be maintained.
D Air filters must be installed in the system and must be
maintained during construction.
D Air filters must be replaced upon construction
completion.
D The input rate and temperature rise must be set per the
unit rating plate.
D One hundred percent (100%) outdoor air must be
provided for combustion air requirements during
construction. Installation of this unit in its intended
outdoor location will accomplish this.
D The heat exchanger, components, duct system, air
filters and evaporator coil must be thoroughly cleaned
following final construction clean−up.
D The unit operating conditions (including ignition, input
rate, temperature rise and venting) must be verified
according to these installation instructions.
NOTE − The Commonwealth of Massachusetts
stipulates these additional requirements:
D Gas furnaces shall be installed by a licensed
plumber or gas fitter only.
D The gas cock must be T handle" type.
D When flexible connectors are used, the maximum
length shall not exceed 36".
Location Selection
Use the following guidelines to select a suitable location for
these units.
1 − Unit is designed for outdoor installation only. Unit must
be installed so all electrical components are protected
from water.
2 − Condenser coils must have an unlimited supply of air.
3 − For ground level installation, use a level pre−fabricated
pad or use a level concrete slab with a minimum
thickness of 4 inches. The length and width should be
at least 6 inches greater than the unit base. Do not tie
the slab to the building foundation.
4 − Maintain level within a tolerance of 1/4 inch maximum
across the entire length or width of the unit.