White Rodgers 24A34-4, 24A34-15, 24A34-14, 24A34-2, 24A34-6 User Manual
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24A34 Series
CAUTION
!
Fan/Heat Sequencers
INSTALLATION INSTRUCTIONS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
The 24A34 Series Fan/Heat Sequencer gives the service technician a direct replacement for sequencing both fan and heat.
The terminal markings on the 24A34 sequencers are equivalent
to most other manufacturers’ types.
These sequencers may be wired in series, as shown in wiring
diagrams, to allow sequencing of one through seven element
furnaces.
To prevent electrical shock and/or equipment damage,
disconnect electric power to system, at main fuse or
circuit breaker box, until installation is complete.
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
SPECIFICATIONS
Electrical Ratings - Single Load Contact Ratings (All Models)
Resistive (Non-Inductive) Motor Ratings (Inductive)
VAC
120 3000 25.0 14.0A 72.0A 125 VA
240 6000 25.0 7.0A 42.0A 125 VA
480 6000 12.5 – – 480 VA
Electrical Ratings - Single Load Contact Ratings (All Models)
Model
Number Timings Switches
24A34-1
24A34-2
24A34-3 ➀
24A34-4
24A34-5 ➀
24A34-6 ➀
24A34-14 ➀➁
24A34-15
TABLE NOTES:
➀ M1-M2 and M3-M4 are always first switches to turn ON and last to turn OFF. All other switches are random ON and random OFF
➁ 24A34-14 Switch contacts designated F
♦ These contacts switch simultaneously
NOTE: Underwriters Laboratories requires a fan interlock circuit to insure the blower remains operating whenever more than one sequencer is used. The fan interlock should be the M1 / M2 contacts of the second or third sequencer. All M1 / M2 contacts are wired to the blower motor so that any sequencer that is energized
will keep the blower ON.
1 1 1-20 – – – –
1 1 – – 30-90 – –
1 2 1-20 1-20 – – –
1 2 – – 30-90 30-90 –
2 3 1-110 1-110 1-110 – –
2 4 1-110 1-110 1-110 1-110 –
4 5 1-160 1-160 1-160 1-160 1-160
1 1 1-60 – – – –
M1-M2 M3-M4 M5-M6 M7-M8 M9-M10 M1-M2 M3-M4 M5-M6 M7-M8 M9-M10
- F2 instead of M1 - M
1
Timings – ON
40-110 – – – –
– – 1-30 – –
♦
♦ ♦
♦ ♦ ♦ ♦
♦
2
40-110 40-110 – – –
♦
– – 1-30 1-30 –
1-110 1-110 1-110 – –
♦♦
1-110 1-110 1-110 1-110 –
1-160 1-160 1-160 1-160 1-160
♦
75-95 – – – –
Pilot DutyWatts Amps Full Load Locked Rotor
Timings – OFF
www.white-rodgers.com
www.emersonclimate.com
PART NO. 37-4800C
Replaces 37-4800B
1050
WIRING DIAGRAMS
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
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
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
FAN DELAY OFF
FOR ONE 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
FOR TWO ELEMENT FURNACES
COMBINATION Fan and Heater Loads
SEPARATE Fan and Heater Loads
FOR THREE ELEMENT FURNACES WITH
SEPARATE FAN & HEATER LOADS
SINGLE-STAGE Room Thermostat
TWO-STAGE Room Thermostat Option
2
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