NOTE:Thedensityof air decreaseswith in-
creasingelevationabovesea level.This re-
ducesthequantityofcombustionairdrawninto
thefurnaceundernormaloperationandrequires
theunitbederatedbyusingsmallergasorifices
orlowermanifoldpressure.
CONVERSION
This furnace can be converted from the fac-
tory-equipped gas to either natural gas (for LP
gas ready models), or LP gas (for natural gas
ready models). Conversions must be made by
qualified service personnel, using only factory
authorized or approved parts. The required
conversion orifices are supplied with the fur-
nace.
WARNING:
This conversion kit shall be installed by
a qualified service agency in accordance
with the manufacturer's instructions and
all applicable codes and requirements
of the authority having jurisdiction. If
the information in these instructions is
not followed exactly, a fire, explosion
or production of carbon monoxide
may result causing property damage,
personal injury or loss of life. The
qualified service agency is responsible
for the proper installation of this kit.The
installation is not proper and complete
until the operation of the converted
appliance is checked as specified in the
manufacturer's instructions supplied
with the kit.
/!XWARNING:
DO NOT REMOVE OR DEFACE THE
ORIGINAL RATING PLATE.
CAUTION:
The gas supply shall be shut off prior to
disconnecting the electrical power,
before proceeding with the conversion.
Turning Off The Fuel Supply:
1. Set the room thermostat to "OFF" or its
lowest temperature setting.
2. Turn OFF the main gas supplyto the appli-
ance at the manual valve, outside of the
appliance casing.
3. Remove the control access panel / Iou-
vered door.
4. Move the appliance gasvalve lever/knob to
the "OFF" position.
5. Turn OFF the electrical power to the appli-
ance.
Removing The Burner Assembly:
1. Follow the instructions "To Turn Off the
Fuel Supply to the Appliance."
2. Disconnect the flame sensor wire from the
burner box.
3. Disconnect the ignitor wires at the 2 pin
plug. This is a locking quick connect and
both sides of the lower section must be
depressed in order to be separated.
4. Remove the wires from the terminals of
the gas valve.
5. Disconnect the rubber pressure tubes
from the gas valve and the burner box.
6. Remove the burner access cover plate
from the burner box.
7. Remove supply gas piping from the gas
valve.
8. Carefully remove the burner assembly fas-
teners and remove the burner assembly from
the appliance. Keep the fasteners that were
removed. Note that the burner box may have
hooks near the top and on the right and left
hand sides. To remove this type of burner box,
lift the burner box upwards and then remove
the box from the unit.
Removing The Burner Orifices:
1. Remove the four (4) fasteners that secure
the gas manifold to the burner box, as
shown in Figure 25. Carefully remove the
gas manifold assembly from the burner
box. Note that the gas manifold assembly
consists of the gas valve, the gas manifold,
and the orifices.
CAUTION:
Caution: Do not re-drill the burner
orifices. If the orifice size must be
changed, use only new orifices.
2. Carefully remove the burner orifices from
the gas manifold, as shown in Figure 25.
22
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