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WIRING DIAGRAMS
FOR ONE ELEMENT FURNACES
FAN DELAY OFF
COMBINATION Fan and Heater Loads
SEPARATE Fan and Heater Loads
ONE POLE
WIRING
M2M1 To 1st element & fan
HH To 24 VAC wall thermostat
(One Timing)
24A34-1 / -2
TWO POLE
WIRING
M2M1 To fan
HHTo 24vAC wall thermostat
(One Timing)
24A34-3 / -4
M4M3 To 1st element
DOTTED LINE BETWEEN "H" TERMINAL
IS A FACTORY-INSTALLED JUMPER
FOR TWO ELEMENT FURNACES
COMBINATION Fan and Heater Loads
SEPARATE Fan and Heater Loads
FOR THREE ELEMENT FURNACES WITH
COMBINATION FAN & HEATER LOADS
SINGLE-STAGE Room Thermostat
TWO-STAGE Room Thermostat Option
TWO POLE
WIRING
M2M1 To 1st element & fan
HHTo 24vAC wall thermostat
(One Timing)
24A34-3 / -4
M4M3 To 2nd element
TWO POLE
WIRING
M6M5
To 2nd element or aux. contacts
H
HTo 24vAC wall thermostat
(Two Timings)
24A34-5
M2M1
To fan
M4M3
To 1st element
H
H
ONE POLE
TWO POLE
WIRING
M6M5
To 3rd element
H
H
To 24vAC wall thermostat
(Two Timings)
24A34-5
M2M1
To fan & 1st element
M4M3
To 2nd element
H
H
ONE POLE
TWO POLE
WIRING
M8M7
To 3rd element
H
H
To 24vAC wall thermostat
(Two Timings)
24A34-6
M2M1
To fan & 1st element
M4M3
To 2nd element
H
H
TWO POLE
M6M5
FOR THREE ELEMENT FURNACES WITH
SEPARATE FAN & HEATER LOADS
SINGLE-STAGE Room Thermostat
TWO-STAGE Room Thermostat Option
TWO POLE
WIRING
M8M7
To 3rd element
H
H
To 24vAC wall thermostat
(Two Timings)
24A34-5
M2M1
To fan
M4M3
To 1st element
H
H
TWO POLE
M6M5
To 2nd element
TWO POLE
M8M7
To 2nd element
H
H
To W1 of 24vAC wall thermostat
(Two Timings)
24A34-6
M2M1
To fan
M4M3
To 1st element
H
H
TWO POLE
M6M5
To common of 24v transformer
TWO POLE
WIRING
M2M1 To fan interlock
HHTo W2 of 24vAC wall thermostat
(One Timing)
24A34-3 / -4
M4M3 To 3rd element
WIRING
2
3
I
Normally close
H
H
Normally open
(One Timing)
24A34-15