©American Standard Inc. 2000
2
22-1706-01-0400 (EN)
General
Features
Natural Gas Models
Central heating furnace designs are
certified by the American Gas Association
for both natural and L.P. gas. Limit setting
and rating data were established and
approved under standard rating
conditions using American National
Standards Institute standards.
Safe Operation
The Integrated System Control has solid
state devices, which continuously monitor
for presence of flame, when the system
is in the heating mode of operation. Dual
solenoid combination gas valve and
regulator provide extra safety.
Quick Heating
Durable, cycle tested, heavy gauge
aluminized steel heat exchanger
quickly transfers heat to provide warm
conditioned air to the structure. Low
energy power vent blower, to increase
efficiency and provide a positive dis-
charge of gas fumes to the outside.
Burners
Multi-port In-shot burners will give years
of quiet and efficient service. All models
can be converted to L.P. gas without
changing burners.
Integrated System Control
Exclusively designed operational
program provides total control of furnace
limit sensors, blowers, gas valve, flame
control and includes self diagnostics for
ease of service. Also contains connec-
tion points for E.A.C./humidifier.
Condensate Drain
Built-in trap which can drain from either
side when the furnace is installed upflow.
Air Delivery
The variable speed, direct drive blower
motor, has sufficient airflow for most
heating and cooling requirements, will
switch from heating to cooling speeds on
demand from room thermostat. The
blower door safety switch will prevent or
terminate furnace operation when the
blower door is removed.
Secondary Heat Exchanger
The XL 90 has a special type 29-4C™
stainless steel secondary heat ex-
changer to reclaim heat from flue gases
which would normally be lost outside.
Styling
Heavy gauge steel and “wrap-around”
cabinet construction is used in the
cabinet with baked-on enamel finish for
strength and beauty. The heat exchanger
section of the cabinet is completely lined
with foil faced fiberglass insulation. This
results in quiet and efficient operation
due to the excellent acoustical and
insulating qualities of fiberglass. Built-in
bottom pan and alternate bottom, left or
right side return air connection provision.
Features And General Operation
The XL 90 High Efficiency Gas Furnaces
employ an Adaptive Silicon Nitride Hot
Surface Ignition system, which elimi-
nates the waste of a constant burning
pilot. The integrated system control lights
the main burners upon a demand for
heat from the room thermostat. Complete
front service access.
a. Low energy power venter.
b. Vent proving pressure switch.
Summary of Contents for TDX060R936V
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