1 - 2
3
4
Family
Htg. Stages
Tier
P
T
59
Family
S - Single Stage
T - Two Stage
M - Modulating
C - Comfort
P - Performance
N - Infinity
MANUAL RESET
ROLLOUT SWITCH
GAS VALVE
OPERATING INSTRUCTIONS
NOT SHOWN (LOCATED ON
MAIN FURNACE DOOR, SEE
OPERATING INSTRUCTIONS
INSIDE DOOR FIGURE).
ELECTRICAL JUNCTION
BOX (IF REQUIRED,
LOCATION MAY VARY)
BLOWER DOOR
SAFETY SWITCH
FURNACE
CONTROL
BOARD
RATING PLATE NOT SHOWN
(LOCATED ON BLOWER DOOR)
MODEL NUMBER NOMENCLATURE
Example of Model Number
5
6
Major Series
Htg. Cap.
Base Effy.
6
A
0 - +90 AFUE
2 - +92 AFUE
3 - +93 AFUE
5 - +95 AFUE
040=40,000 BTU
6 - +96 AFUE
060=60,000 BTU
7 - +97 AFUE
080=80,000 BTU
100=100,000 BTU
120=120,000 BTU
Major Series
140=140,000 BTU
Not all familes have these models.
FURNACE COMPONENTS
GAS BURNER
FLAME
SENSOR
REPRESENTATIVE DRAWING ONLY, SOME MODELS MAY VARY IN APPEARANCE.
7 - 9
11 - 12
10
Motor
Width
E
14
040
14 - 14.2"
17 - 17.5"
21 - 21.0"
24 - 24.5"
S - Standard
E - Energy Efficient
V - Variable Speed
HOT SURFACE
IGNITER
MANUAL RESET
ROLLOUT SWITCH
3
13
14
15 - 16
Voltage
Minor Series
Airflow
--
--
10
08 - 800 CFM
10 - 1000 CFM
12 - 1200 CFM
14 - 1400 CFM
16 - 1600 CFM
18 - 1800 CFM
20 - 2000 CFM
22 - 2200 CFM
Minor Series
Voltage
MAIN LIMIT SWITCH
(BEHIND GAS VALVE)
INDUCER MOTOR
ASSEMBLY
MEDIA CABINET
BLOWER AND
MOTOR
CAPACITOR/
POWER CHOKE
(IF USED)
A14368
A11408
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