White Rodgers 24A05A-1, 24A05E-1, 24A05Z-1, 24A01Z-10 Installation Instructions

WHITE-RODGERS

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.

These “Level-Temp” controls have been designed to operate with a White-Rodgers low-voltage electric heat thermostat to provide a system for controlling electric warm air heaters and electric radiant heating devices such as duct heaters, wall heaters, baseboards, floor and ceiling cable heaters.

When required, two or more Level-Temp Silent Operators can be operated by one two-wire low voltage thermostat.

The operator has been carefully adjusted. No attempt should be made to adjust it after it leaves the factory.

TYPE 24A01 / 24A05

“SLIMLINE” LEVEL-TEMP

SILENT OPERATOR

(Normally Open)

INSTALLATION INSTRUCTIONS

DESCRIPTION

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.

To prevent electrical shock and/or equipment damage, disconnect electric power to system, at main fuse or circuit breaker box, until installation is complete.

CAUTION

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.

Do not use on circuits exceeding specified voltages. Higher voltages will damage control and could cause shock or fire hazard.

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 INPUT THERMOSTAT RESISTIVE

NUMBER VOLTAGE /FREQUENCY CURRENT NON-INDUCTIVE

24A01G-3 240VAC, 60 Hz 0.2A 25A, 6000W, 240V 12A, 240V 72A, 240V 24A01Z-10 347VAC, 60 Hz 0.2A 17A, 5900W, 347V 24A01Z-11 600VAC, 60 Hz 0.2A 12A, 7200W, 600V 24A05A-1 120VAC, 60 Hz 0.2A 25A, 3000W, 120V 16A, 120V 96A, 120V 24A05E-1 208VAC, 60 Hz 0.2A 25A, 5200W, 208V 12A, 208V 72A, 208V 24A05Z-1 277VAC, 60 Hz 0.2A 22A, 6000W, 277V

Room Thermostat:

Set adjustable heat anticipator at 0.2 Amps. For fixed anticipation thermostats, use 0.15 to 0.25 Amp. heater.

A.C. A.C. MOTOR INDUCTIVE

FULL LOAD LOCKED ROTOR

Mounting: 1/2" conduit hub or mounting tabs with several break-offs for 2, 3 or 4 hole mounting

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO. 9797 REAVIS RD., ST. LOUIS, MO. 63123 (314) 577-1300, FAX (314) 577-1517

9999 HWY. 48, MARKHAM, ONT. L3P 3J3 (905) 475-4653, FAX (905) 475-4625

Printed in U.S.A.

PART NO. 37-4701C

Replaces 37-4701B

0023

OPERATION

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. 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.

INSTALLATION

The “Level-Temp” can be mounted in any position without affecting the performance.

1. Mounting with the 1/2" male conduit hub: Relay may be mounted to any standard junction box or wiring compartment. See drawings under WIRING DIAGRAMS for a variety of possible mountings. Depending on the position of the relay on the junction box or wiring compartment it may be necessary to remove the break-off mounting tabs.

2. Mounting with the universal mounting tabs:

a. Relay can be mounted to various metal enclo-

sures, ducts, or mounting plates. The universal mounting tab has several break-offs for 2, 3 or 4 mounting holes.

b. Location of the mounting holes may be simplified

by holding the control against the mounting surface and marking the proper position for drilling the holes (No. 8 size screws are recommended).

WIRING

Line Voltage

LINE

HEATING

LOAD

TRANSFORMER

YELLOW

BLACK BLUE

Line Voltage Field Low Voltage

LINE VOLTAGE SNAP SWITCH (NORMALLY OPEN)

AMBIENT COMPENSATING BIMETAL

BIMETAL HEATER

WHITE RED

Fig. 1. Internal wiring of Type 24A01/05

BREAK-OFF TABS

4 1/8"

3 7/16"

2 13/32"

2 11/16"

1/2" STD. CONDUIT HUB

7/16"

15/16"

9/16"

3 11/32"

1 3/8"

15/32"

9/16"

2 1/2"

Fig. 2. Dimensions of Type 24A01/05 Level Temp

1 "

1 9/16"

WIRING

All wiring should be done in accordance with local and national electrical codes and ordinances.

MAKE L2 “HOT”

ON 120V MODELS

LOW

VOLTAGE

THERMOSTAT

RED WHITE

Fig. 3. Diagram of “LEVEL TEMP” Wiring

LOAD LINE

YELLOW

BLACKBLUE

HEATING ELEMENTS

TYPE 24A01

LINE

WIRING ENCLOSURE THERM.

LEVEL TEMP

Fig.4. Electric Duct Heaters

WIRING CONT.

All wiring should be done in accordance with local and national electrical codes and ordinances.

If the manufacturer of the heating equipment has included a wiring diagram, follow such recommendations. If none is available, these diagrams show suggested methods of attaching and wiring the “Level-Temp” Silent Operator control.

TO LOW VOLTAGE THERMOSTAT

BASEBOARD

LEVEL TEMP. SILENT OPERATOR

BLUE

BLACK

LINE

Fig. 5. Baseboard Heaters

THERM.

TO OTHER BASEBOARD UNITS

HEATING ELEMENT

YELLOW

WIRING ENCLOSURE

BLACK

BLUE

YELLOW

LINE

TO LOW VOLTAGE THERMOSTAT

HEATING

ELEMENT

BLUE

BLACK

LEVEL TEMP. SILENT OPERATOR

LINE

Fig. 7. Wall or Ceiling Heaters

BASEBOARD

YELLOW

WIRING ENCLOSURE

TO HEATING ELEMENT

HEATING

ELEMENT

HEATING ELEMENT

Fig. 8. Ceiling Cable Heaters

WIRING ENCLOSURE

Fig. 6. Baseboard Heaters With Limit

LINE

LEVEL TEMP. SILENT OPERATOR

USING ONE THERMOSTAT AND TWO OR MORE SILENT OPERATORS TO “SEQUENCE” LOADS

Figure 9 shows how several Level-Temp Silent Operators can be used to “sequence on” separate heating loads. This may be accomplished by “jumpering” the thermostat leads of the additional Silent Operators, and wiring them in careful conformance to the recommended wiring diagram. Note that only one Silent Operator is in the thermostat circuit. Therefore, set the adjustable heater in thermostat at .2A, or use a thermostat with a .2A fixed heater.

SEQUENCE OF OPERATIONS: A circuit is completed through the bimetal heater of the first Silent Operator as the contacts of the low voltage thermostat close. In

this Operator closes, energizing heating load #1 and the transformer primary of Silent Operator #2. Since the thermostat leads of this Operator are “jumpered”, its bimetal heater immediately begins its warping action. In approximately 45 seconds the line voltage switch of Operator #2 closes to energize heating load #2 and the transformer primary of Silent Operator #3. This “sequence on” pattern continues until all successive Silent Operators and heating loads have been energized. When the single Level-Temp room thermostat opens its contacts, each separate heating load will be “sequenced off” in intervals of approximately 45 seconds.

approximately 45 seconds the line voltage snap-switch of

SEPARATE

CONTROL

SECTION

TO LOW VOLTAGE THERMOSTAT

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