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

WHITE-RODGERS

TYPE 24A01 / 24A05

“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” 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.

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.

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.

WARNING

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

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)

SPECIFICATIONS

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
	TYPE	INPUT	THERMOSTAT	RESISTIVE
					FULL LOAD			LOCKED ROTOR
	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

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
						[phone], FAX [phone]	Printed in U.S.A.
						9999 HWY. 48, MARKHAM, ONT. L3P 3J3
						[phone], FAX [phone]

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.

		WIRING
		Line Voltage
	LINE	Line Voltage Field
		Low Voltage
		TRANSFORMER
		WHITE
	YELLOW	RED
	BLACK
	BLUE	LINE VOLTAGE
		SNAP SWITCH
		(NORMALLY OPEN)
	HEATING	AMBIENT
		COMPENSATING
	LOAD
		BIMETAL
		BIMETAL HEATER

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

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 enclosures, 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).

BREAK-OFF TABS					1/2" STD. CONDUIT HUB

	7/16"
	15/16"
4 1/8"	9/16"
3 7/16"	3 11/32"
	2 1/2"
	1 3/8"
	15/32"
	1 "
2 13/32"	9/16"
	1 9/16"
2 11/16"

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

WIRING

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

HEATING

ELEMENTS

	MAKE L2 “HOT”
	ON 120V MODELS
LOW			L1
VOLTAGE	LOAD	YELLOW	LINE
THERMOSTAT			L2
		BLUE	BLACK
RED	WHITE			TYPE 24A01
			LINE	LEVEL TEMP
Fig. 3. Diagram of “LEVEL TEMP” Wiring
			WIRING ENCLOSURE	THERM.

Fig.4. Electric Duct Heaters

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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.

HEATING ELEMENT

TO LOW VOLTAGE
THERMOSTAT
		TO OTHER BASEBOARD UNITS
BASEBOARD
	BLUE	HEATING ELEMENT
			TO LOW VOLTAGE
			THERMOSTAT
	YELLOW
	BLACK
				BLUE
		WIRING			YELLOW
LEVEL TEMP.
		ENCLOSURE
SILENT				BLACK
OPERATOR
	LINE
Fig. 5.	Baseboard Heaters
	THERM.	WIRING	LEVEL TEMP.
		ENCLOSURE		LINE	WIRING
			SILENT
LEVEL TEMP.	BLACK		OPERATOR		ENCLOSURE
			Fig. 7.	Wall or Ceiling Heaters
SILENT		LINE
OPERATOR	BLUE	YELLOW
			BASEBOARD
					SEPARATE
					CONTROL
					SECTION
	TO HEATING ELEMENT
			HEATING
			ELEMENT

	WIRING	LEVEL TEMP.
	ENCLOSURE	SILENT	TO LOW VOLTAGE
	LINE	OPERATOR
	HEATING ELEMENT		THERMOSTAT

Fig. 6. Baseboard Heaters With Limit

Fig. 8. Ceiling Cable Heaters

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 approximately 45 seconds the line voltage snap-switch of

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.

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