White Rodgers 24A07A-1 User Manual
TYPE 24A07
“SLIMLINE” LEVEL-TEMP
SILENT OPERATOR
(Normally Open)
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
These Level-Temp Silent Operator relays are designed for use
on electric heating equipment in conjunction with White-Rodgers
low voltage thermostats. They are especially suitable for use on
baseboards, wall insert heaters, etc. Some models also have
an inductive rating to permit them to be used on motor loads
where a time delay is desired.
Different models of these Silent Operator relays are available
for voltage inputs of 120, 208, 240, 277, 347 or 600 volts. Since
these relays are equipped with a self-contained transformer, the
supply voltage used must agree with the voltage rating of the relay.
When required, two or more of these Silent Operator relays can
be operated by one low voltage heating thermostat. These Silent
Operator relays have been carefully adjusted at the factory. No
attempt should be made to adjust them in the field.
PRECAUTIONS
If in doubt about whether your wiring is millivolt, line, or low
voltage, have it inspected by a qualified heating and air conditioning contractor, electrician, or someone familiar with basic
electricity and wiring.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes
and ordinances.
This control is a precision instrument, and should be handled
carefully. Rough handling or distorting components could cause
the control to malfunction.
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 voltages.
Higher voltages will damage control and could cause
shock or fire hazard.
CAUTION
!
WARNING
!
SPECIFICATIONS
ELECTRICAL DATA
Switch Action: Single-Pole, Single-Throw, normally open
Thermal: Average time delay – 45 seconds
Ambient Temp.: -20° to 140°F (-24° to 60°C)
TYPE
NUMBER
24A07A-1
24A07E-1
24A07G-1
24A07Z-1
24A07Z-8
24A07Z-9
INPUT
VOLTAGE /FREQUENCY
120VAC, 60 Hz 0.2A 25A, 3000W, 120V 16A, 120V 96A, 120V
208VAC, 60 Hz 0.2A 25A, 5200W, 208V 12A, 208V 72A, 208V
240VAC, 60 Hz 0.2A 25A, 6000W, 240V 12A, 240V 72A, 240V
277VAC, 60 Hz 0.2A 22A, 6000W, 277V
347VAC, 60 Hz 0.2A 17A, 5900W, 347V
600VAC, 60 Hz 0.2A 12A, 7200W, 600V
THERMOSTAT
CURRENT
Room Thermostat:
Set adjustable heat anticipator at 0.2 Amps. For fixed anticipation thermostats, use 0.15 to 0.25 Amp. heater.
A.C. RESISTIVE
NON-INDUCTIVE
A.C. MOTOR INDUCTIVE
FULL LOAD LOCKED ROTOR
________ ________
________ ________
________ ________
Mounting: Mounting tabs with several break-offs for 2, 3 or 4 hole mounting.
www.white-rodgers.com
www.emersonclimate.com
PART NO. 37-4709D
Replaces 37-4709C
1209
OPERATION
WIRING
Line Voltage Field
BREAK-OFF TABS
Basic Silent Operator components are a line-to-low voltage
transformer, a low voltage bimetal heater, an ambient compensating bimetal, and a normally open SPST line voltage
snap-action switch.
INSTALLATION
The proper location and method of installation for the Silent
Operator relay shall be determined by the manufacturer of the
heating equipment. A dimensional drawing of the Silent Operator
relay is shown at the right.
LINE
TRANSFORMER
YELLOW
BLACK
BLUE
HEATING
LOAD
BIMETAL HEATER
Fig. 1. Internal wiring of Type 24A07
4 1/16"
3 7/16"
7/16"
15/16"
9/16"
1 3/8"
3 11/32"
Line Voltage
Low Voltage
WHITE
RED
LINE VOLTAGE
SNAP SWITCH
(NORMALLY OPEN)
AMBIENT
COMPENSATING
BIMETAL
WIRING
If a wiring diagram is supplied with the heating equipment,
follow those instructions. If none is available, several diagrams
are presented on this sheet which show different wiring methods for these Silent Operator relays. Always be sure that the
supply voltage agrees with the voltage rating of the Silent
Operator relay.
All wiring should be done in accordance with local and national electrical codes and ordinances.
15/32"
2 13/32"
2 11/16"
9/16"
Fig. 2. Dimensions of Type 24A07 Level Temp
MAKE L2 “HOT”
ON 120V MODELS
LOW
VOLTAGE
THERMOSTAT
RED WHITE
YELLOW
BLACKBLUE
ENILDAOL
1 15/32"
L1
L2
Fig. 3. Diagram of “LEVEL TEMP” Wiring
2
WIRING CONT.
SILENT
All wiring should be done in accordance with local and national electrical codes and ordinances.
LOAD # 1
In operation, a circuit is completed through the bimetal
heater as the low voltage room thermostat closes its
contacts. In approximately 45 seconds, the warping action of the heater closes the line voltage snap-switch to
energize the heating load. When the thermostat opens
its contacts, the bimetal heater cools for approximately
45 seconds before the line voltage switch opens to deenergize the heating load.
MAKE L2 “HOT”
ON 120V MODELS
2-WIRE
HEATING
THERMOSTAT
L1
LINE
L2
SILENT
OPERATOR
BLUE
YELLOW
BLACK
R
W
Fig. 4. Diagram using one thermostat to
operate one Level-Temp. operator
USING ONE THERMOSTAT AND TWO OR MORE SILENT OPERATORS TO “SEQUENCE” LOADS
Figure 5 shows how several Silent Operator relays can be
used to “sequence on” separate heating loads. The red
and white leads of additional Silent Operator relays should
be jumpered as shown. All wiring should be performed
As the thermostat closes its contacts, each separate heating load will be “sequenced on” in intervals of 45 seconds.
When the thermostat is satisfied, each separate load
will be “sequenced off” in intervals of about 45 seconds.
exactly as shown.
MAKE L2 “HOT”
ON 120V MODELS
L1
L2
B
LOAD # 1
CAUTION
Leads “A” and “B” must be alternated between
L1 and L2 as shown for each Silent Operator
used.
L1
L2
B
LOAD # 2
OPERATOR # 1
A
YELLOW
BLACK
BLUE
SILENT
OPERATOR # 2
A
YELLOW
BLACK
BLUE
RED
WHITE
TO LOW VOLTAGE
ROOM THERMOSTAT
Use thermostat with a .2A fixed heater,
or set adjustable heater in thermostat
at .2A.
RED
WHITE
WHITE
RED
NOTE
FIELD INSTALLED
WIRE NUT
WIRING
L1
L2
Line Voltage
Line Voltage Field
Low Voltage
Fig. 5. Typical Wiring Diagram to “Sequence” two or more loads
SILENT
OPERATOR # 3
A
B
LOAD # 3
YELLOW
BLACK
BLUE
TO YELLOW
LEAD OF
ADDITIONAL
LEVEL TEMPS
RED
WHITE
3
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