1A66/1A66W

WHITE-RODGERS

ELECTRIC-HEAT THERMOSTAT

(Double Line Disconnect)

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.

The Type 1A66/1A66W Electric Heat Thermostat is de- signed for use on all types of electrical heating installa- tions such as cable heat, baseboards, wall insert heaters, etc. Its narrow operating differential and the ability of its fully exposed knob to sense both radiant heat and room air temperature make this control ideal for use on such installations.

The Type 1A66/1A66W is intended for use on 240 or 277 volts where local codes require that a double line discon- nect thermostat be used.

Dial Setting: Knob may be set anywhere between 40° and 85°F by simply turning knob so that indicator on knob points to the desired setting.

The knob may be turned past 40° to the “OFF” position to obtain temporary shutdown of the heating equipment for short periods of time such as on weekends, vacation, etc. Turning knob to “OFF” position will break both sides of line.

DESCRIPTION

NOTE: Only one side of line is broken during normal cycling of this thermostat.

60

70

50

80

OFF

This control is a precision instrument, and should be handled carefully. Rough handling or distorting compo- nents could cause the control to malfunction. Take care not to push or damage the knob sensing element during installation.

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.

PRECAUTIONS

All wiring must conform to local and national electrical codes and ordinances.

WARNING

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

Do not use on inductive loads. Inductive (motor) loads will damage control and could cause shock or fire hazard.

 

 

SPECIFICATIONS

 

 

Switch Rating: Non-Inductive

Temperature Range: 40° to 85°F

22A (5000W) 240VAC

Differential: 1°F

18A (5000W) 277VAC

Switch Action: Open on rise

 

Contact Structure: Double Line Disconnect - DPST

 

 

 

INSTALLATION

 

 

 

If the heating equipment manufacturer has made provi- sions or recommendations for the location of this control, then follow those instructions. If not, the following sugges- tions should be observed.

1.The control should be mounted in the wall, approxi- mately five feet from the floor, as near as possible to the centre of the controlled area.

2.It should be mounted on a partitioning wall, not on an outside wall.

3.It should be mounted as far as possible from undesir- able sources of heat and cold such as:

a.Windows and doors

b.Direct rays from sun

c.Hot water or cold water pipes

d.Adjoining outside walls

WHITE-RODGERS DIVISION

 

EMERSON ELECTRIC CO.

 

9797 REAVIS RD., ST. LOUIS, MO. 63123

 

(314) 577-1300, Fax (314) 577-1517

Printed in U.S.A.

9999 HWY. 48, MARKHAM, ONT. L3P 3J3

 

(905) 475-4653, FAX (905) 475-4625

 

PART NO. 37-5428C

Replaces 37-5428B 9724

R

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White Rodgers 1A66W installation instructions Installation Instructions, Description, Precautions, Specifications
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1A66, 1A66W, 37-5428c specifications

The White Rodgers 37-5428C,1A66W,1A66 is a highly regarded universal thermostat known for its efficiency and reliability in temperature control for a variety of heating and cooling systems. This thermostat is designed to provide superior temperature management whether for residential or commercial applications.

One of the main features of the 37-5428C,1A66W,1A66 thermostat is its compatibility with a range of HVAC systems, including gas, oil, and electric heating systems, as well as conventional and heat pump systems. This flexibility makes it an ideal choice for diverse environments. Its ability to support both single-stage and multi-stage heating and cooling systems allows for more tailored comfort settings.

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Overall, the White Rodgers 37-5428C,1A66W,1A66 combines versatility, efficiency, and user-centric features, making it a top choice for effective temperature control in various settings, truly representing a significant step forward in thermostat technology.
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