User’s Information Manual
6
441 02 2011 00
Manual Equipment Shutoff Valve
Component Locations for Four Position 90+ Furnaces
Primary Heat Exchanger
Circulating Air Blower
Figure 3
Furnace Control
Pressure Switches
(some models have one)
Representative drawing only, some models may vary in appearance.
Air Intake Pipe
(Required only for Direct--Vent Furnaces)
Rating Plate
Secondary
Heat Exchanger
Furnace Main Gas Control Valve
Plastic Transition Box
Door Interlock Switch
Condensate Trap
5
/
8
²²²²
I.D. Transition Box Drain Hose
1
/
2
²²²²
I.D. Vent Pipe Drain Hose
Combustion Blower
Vent Drain
Fitting
Vent Pipe Grommet
Furnace Vent Pipe (Vent Pipe Connections
through Side Panel on Some Models)
Diagnostic Light
Ignitor & Flame Sensor
(not shown)
25--24--78--1
Pressure
Switch
(Some
models
have one)
Component Locations for
80+ Furnaces (4--Position)
Figure 4
25--24--79--1
Heat
Exchanger
Venter
Representative drawing only, some models may vary in appearance.
Gas
Valve
Ignitor &
Flame
Sensor
(not shown)
Main
Burners
Furnace
Control
Rating
Plate
Diagnostic
Light
Circulating
Blower
Motor
Circulating
Blower
Manual
Equipment
Shutoff
Valve
Drip
Leg
Component Locations for
80+ Furnaces (Downflow)
Figure 5
OFF
25--24--20a--1D
Diagnostic
Light
Furnace
Control
Circulating
Blower
Motor
Circulating
Blower
Pressure
Switch
Rating Plate on
inside of casing
Heat
Exchanger
Manual
Equipment
Shutoff Valve
Drip
Leg
Venter
Furnace
Main Gas
Control Valve
Ignitor &
Flame
Sensor
(not shown)
Representative drawing only, some models may vary in appearance.
Main Burners
