White Rodgers 24A34-4, 24A34-15, 24A34-14, 24A34-2, 24A34-6 User Manual

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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

Watts

Amps

Full Load

Locked Rotor

 

Pilot Duty

 

 

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

 

 

 

Timings ON

 

 

 

Timings OFF

 

Number

Timings

Switches

M1-M2

M3-M4

M5-M6

M7-M8

M9-M10

M1-M2

M3-M4

M5-M6

M7-M8

M9-M10

24A34-1

1

1

1-20

40-110

 

24A34-2

1

1

30-90

 

1-30

24A34-3

1

2

1-20 1-20

40-110

40-110

24A34-4

1

2

30-90 30-90

 

1-30 1-30

24A34-5

2

3

1-110 1-110

1-110

1-110

1-110

1-110

24A34-6

2

4

1-110 1-110

1-110 1-110

1-110

1-110

1-110 1-110

24A34-14

4

5

1-160 1-160

1-160

1-160

1-160

1-160

1-160

1-160

1-160

1-160

24A34-15

1

1

1-60

75-95

 

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 OFF24A34-14 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 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.

 

PART NO. 37-4800C

www.white-rodgers.com

Replaces 37-4800B

www.emersonclimate.com

1050

White Rodgers 24A34-4, 24A34-15, 24A34-14, 24A34-2, 24A34-6 User Manual

FAN DELAY OFF

 

 

WIRING

I

2

Normally close

 

3

Normally open

H

H

 

(One Timing)

24A34-15

FOR ONE ELEMENT FURNACES

COMBINATION Fan and Heater Loads

 

 

 

 

 

 

 

WIRING

ONE POLE

M1

 

 

 

M2

 

To 1st element & fan

 

 

 

H

 

 

 

H

 

To 24 VAC wall thermostat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(One Timing)

24A34-1 / -2

SEPARATE Fan and Heater Loads

 

 

WIRING

M1

M2

To fan

TWO POLE M3

M4

To 1st element

H

H

To 24vAC wall thermostat

(One Timing)

24A34-3 / -4

FOR TWO ELEMENT FURNACES

COMBINATION Fan and Heater Loads

 

 

WIRING

M1

M2

To 1st element & fan

TWO POLE M3

M4

To 2nd element

H

H

To 24vAC wall thermostat

(One Timing)

24A34-3 / -4

SEPARATE Fan and Heater Loads

 

 

 

WIRING

 

M5

M6 To 2nd element or aux. contacts

ONE POLE

H

H

 

 

 

 

M1

M2

To fan

TWO POLE

M3

M4

To 1st element

 

H

H To 24vAC wall thermostat

 

 

(Two Timings)

 

 

 

24A34-5

 

DOTTED LINE BETWEEN "H" TERMINAL

IS A FACTORY-INSTALLED JUMPER

WIRING DIAGRAMS

FOR THREE ELEMENT FURNACES WITH COMBINATION FAN & HEATER LOADS

SINGLE-STAGE Room Thermostat

 

 

 

WIRING

 

M5

M6

To 3rd element

ONE POLE

H

H

To 24vAC wall thermostat

 

 

M1

M2

To fan & 1st element

TWO POLE M3

M4

To 2nd element

 

H

H

 

(Two Timings)

24A34-5

TWO-STAGE Room Thermostat Option

 

 

 

WIRING

 

M5

M6

 

TWO POLE

M7

M8

To 3rd element

 

H

H To 24vAC wall thermostat

 

M1

M2 To fan & 1st element

TWO POLE

M3

M4

To 2nd element

 

H

H

 

 

 

(Two Timings)

 

 

 

24A34-6

 

FOR THREE ELEMENT FURNACES WITH SEPARATE FAN & HEATER LOADS

SINGLE-STAGE Room Thermostat

 

 

 

WIRING

 

M5

M6

To 2nd element

TWO POLE

M7

M8

To 3rd element

 

H

H

To 24vAC wall thermostat

 

M1

M2

To fan

TWO POLE

M3

M4

To 1st element

 

H

H

 

(Two Timings)

24A34-5

TWO-STAGE Room Thermostat Option

 

 

 

WIRING

 

M1

M2

To fan interlock

TWO POLE

M3

M4

To 3rd element

 

H

H To W2 of 24vAC wall thermostat

 

 

(One Timing)

 

 

 

24A34-3 / -4

 

 

M5

M6 To common of 24v transformer

TWO POLE

M7

M8

To 2nd element

 

H

H To W1 of 24vAC wall thermostat

 

M1

M2

To fan

TWO POLE

M3

M4

To 1st element

 

H

H

 

(Two Timings)

24A34-6

2

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