White Rodgers Recording Equipment 24A34 User Manual

24A34 Series  
Fan/Heat Sequencers  
INSTALLATION INSTRUCTIONS  
FAILURETO 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 tech-  
nician 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.  
CAUTION  
!
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  
240  
480  
Watts  
3000  
6000  
6000  
Amps  
25.0  
Full Load  
14.0A  
7.0A  
Locked Rotor  
Pilot Duty  
125 VA  
72.0A  
42.0A  
25.0  
125 VA  
12.5  
480 VA  
Electrical Ratings - Single Load Contact Ratings (All Models)  
Timings ON  
Timings OFF  
Model  
Number  
Timings Switches M1-M2 M3-M4 M5-M6 M7-M8 M9-M10 M1-M2 M3-M4 M5-M6 M7-M8 M9-M10  
40-110  
24A34-1  
24A34-2  
1
1
1
1
2
2
4
1
1
1
2
2
3
4
5
1
1-20  
30-90  
1-30  
40-110 40-110  
1-20  
1-20  
24A34-3 ➀  
24A34-4  
1-30  
1-110  
1-30  
30-90 30-90  
1-110 1-110  
1-110 1-110 1-110  
24A34-5 ➀  
24A34-6 ➀  
24A34-14 ➀➁  
24A34-15  
1-110 1-110  
1-110 1-110  
1-110 1-110 1-110 1-110  
1-160 1-160 1-160 1-160  
1-160  
1-160 1-160 1-160 1-160 1-160  
75-95  
1-60  
TABLE NOTES:  
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  
24A34-14 Switch contacts designated F1 - F2 instead of M1 - M2  
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 in-  
terlock 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.  
PART NO. 37-4800C  
Replaces 37-4800B  
1050  
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WIRING DIAGRAMS  
FOR FOUR ELEMENT FURNACES  
FOR FIVE ELEMENT FURNACES  
COMBINATION Fan and Heater Loads  
COMBINATION Fan and Heater Loads  
TWO-STAGE Room Thermostat Option After 3rd Element  
SINGLE-STAGE Room Thermostat  
WIRING  
WIRING  
M5  
M6  
M8  
H
To 3rd element  
To 5th element  
M5  
H
M6  
H
ONE POLE  
To W2 of 24vAC wall thermostat  
TWO POLE M7  
To 4th element  
H
To 24vAC wall thermostat  
To fan & 1st element  
M1  
M2  
To fan interlock  
To 4th element  
M1  
M2  
TWO POLE M3  
H
M4  
H
TWO POLE M3  
H
M4  
H
To 2nd element  
(Two Timings)  
24A34-5  
(Two Timings)  
24A34-6  
M5  
M6  
M8  
H
To common of 24v transformer  
To 3rd element  
TWO POLE M7  
TWO-STAGE Room Thermostat Option after 2nd Element  
H
To W1 of 24vAC wall thermostat  
To fan & 1st element  
WIRING  
M1  
M2  
M5  
H
M6  
H
To 4th element  
TWO POLE M3  
H
M4  
H
To 2nd element  
ONE POLE  
To W2 of 24vAC wall thermostat  
To fan interlock  
M1  
M2  
(Two Timings)  
24A34-6  
TWO POLE M3  
H
M4  
H
To 3rd element  
(Two Timings)  
24A34-5  
SEPARATE Fan and Heater Loads  
TWO-STAGE Room Thermostat Option After 2nd Element  
WIRING  
To common of 24v transformer  
To W1 of 24vAC wall thermostat  
To fan & 1st element  
M5  
M6  
H
ONE POLE  
H
M1  
M2  
To 4th element  
To 2nd element  
M5  
M6  
M8  
H
TWO POLE M3  
H
M4  
H
TWO POLE M7  
To 5th element  
To W2 of 24vAC wall thermostat  
H
(Two Timings)  
24A34-5  
M1  
M2  
To fan interlock  
To 3rd element  
TWO POLE M3  
H
M4  
H
SEPARATE Fan and Heater Loads  
(Two Timings)  
24A34-6  
TWO-STAGE Room Thermostat Option after 2nd Element  
WIRING  
M5  
M6  
M8  
H
To common of 24v transformer  
To 2nd element  
TWO POLE M7  
M5  
H
M6  
H
To 4th element  
ONE POLE  
H
To W1 of 24vAC wall thermostat  
To fan  
To W2 of 24vAC wall thermostat  
M1  
M2  
M1  
M2  
To fan interlock  
To 3rd element  
TWO POLE M3  
H
M4  
H
To 1st element  
TWO POLE M3  
H
M4  
H
(Two Timings)  
24A34-6  
(Two Timings)  
24A34-5  
M5  
M6  
M8  
H
To common of 24v transformer  
To 2nd element  
TWO POLE M7  
H
To W1 of 24vAC wall thermostat  
To fan  
M1  
M2  
TWO POLE M3  
H
M4  
H
To 1st element  
(Two Timings)  
24A34-6  
DOTTED LINE BETWEEN "H" TERMINAL  
IS A FACTORY-INSTALLED JUMPER  
3
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WIRING DIAGRAMS  
FOR SIX ELEMENT FURNACES  
FOR SEVEN ELEMENT FURNACES  
COMBINATION Fan and Heater Loads  
COMBINATION Fan and Heater Loads  
TWO-STAGE Room Thermostat Option After 3rd or 5th Element  
TWO-STAGE Room Thermostat Option After 3rd Element  
WIRING  
WIRING  
M5  
H
M6  
H
To 7th element  
M5  
M6  
M8  
H
To 5th element  
ONE POLE  
To W2 of 24vAC wall thermostat  
To fan interlock  
TWO POLE M7  
To 6th element  
M1  
M2  
To W2 of 24vAC wall thermostat  
H
TWO POLE M3  
H
M4  
H
To 6th element  
M1  
M2  
To fan interlock  
To 4th element  
TWO POLE M3  
H
M4  
H
(Two Timings)  
24A34-5  
(Two Timings)  
24A34-6  
M5  
M6  
M8  
H
To common of 24v transformer  
To 5th element  
TWO POLE M7  
M5  
M6  
M8  
H
To common of 24v transformer  
To 3rd element  
H
To W2 of 24vAC wall thermostat  
To fan interlock  
TWO POLE M7  
M1  
M2  
H
To W1 of 24vAC wall thermostat  
To fan & 1st element  
TWO POLE M3  
M4  
H
To 4th element  
M1  
M2  
H
TWO POLE M3  
H
M4  
H
To 2nd element  
(Two Timings)  
24A34-6  
(Two Timings)  
24A34-6  
M5  
M6  
M8  
H
To common of 24v transformer  
To 3rd element  
TWO POLE M7  
H
To W1 of 24vAC wall thermostat  
To fan & 1st element  
SEPARATE Fan and Heater Loads  
M1  
M2  
TWO-STAGE Room Thermostat Option After 2nd or 4th Element  
TWO POLE M3  
H
M4  
H
To 2nd element  
WIRING  
M5  
H
M6  
H
To 6th element  
(Two Timings)  
24A34-6  
ONE POLE  
To W2 of 24vAC wall thermostat  
To fan interlock  
M1  
M2  
SEPARATE Fan and Heater Loads  
TWO-STAGE Room Thermostat Option After 3rd or 5th Element  
WIRING  
TWO POLE M3  
H
M4  
H
To 5th element  
(Two Timings)  
24A34-6  
M5  
M6  
M8  
H
To 6th element  
M5  
M6  
M8  
H
To common of 24v transformer  
To 4th element  
TWO POLE M7  
To 7th element  
TWO POLE M7  
H
To W2 of 24vAC wall thermostat  
To fan interlock  
H
To W2 of 24vAC wall thermostat  
To fan interlock  
M1  
M2  
M1  
M2  
TWO POLE M3  
H
M4  
H
To 5th element  
TWO POLE M3  
M4  
H
To 3rd element  
H
(Two Timings)  
24A34-6  
(Two Timings)  
24A34-6  
M5  
M6  
M8  
H
To common of 24v transformer  
To 4th element  
M5  
M6  
M8  
H
To common of 24v transformer  
To 2nd element  
TWO POLE M7  
TWO POLE M7  
H
To W2 of 24vAC wall thermostat  
To fan interlock  
H
To W1 of 24vAC wall thermostat  
To fan  
M1  
M2  
M1  
M2  
TWO POLE M3  
H
M4  
H
To 3rd element  
TWO POLE M3  
H
M4  
H
To 1st element  
(Two Timings)  
24A34-6  
(Two Timings)  
24A34-6  
M5  
M6  
M8  
H
To common of 24v transformer  
To 2nd element  
TWO POLE M7  
H
To W1 of 24vAC wall thermostat  
To fan  
DOTTED LINE BETWEEN "H" TERMINAL  
IS A FACTORY-INSTALLED JUMPER  
M1  
M2  
TWO POLE M3  
H
M4  
H
To 1st element  
(Two Timings)  
24A34-6  
White-Rodgers is a division  
of Emerson Electric Co.  
The Emerson logo is a  
trademark and service mark  
of Emerson Electric Co.  
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