White Rodgers 37 5428c Thermostat User Manual

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1A66/1A66W  
ELECTRIC-HEAT THERMOSTAT  
(Double Line Disconnect)  
WHITE-RODGERS  
INSTALLATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURETOREADANDFOLLOWALLINSTRUCTIONSCAREFULLYBEFORE  
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL  
INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
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.  
NOTE: Only one side of line is broken during normal cycling of  
this thermostat.  
60  
70  
50  
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.  
80  
OFF  
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.  
PRECAUTIONS  
This control is a precision instrument, and should be All wiring must conform to local and national electrical  
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.  
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.  
CAUTION  
To prevent electrical shock and/or equipment  
damage, disconnectelectricpower tosystem, at  
mainfuseorcircuitbreakerbox,untilinstallation  
is complete.  
Do not use on inductive loads. Inductive (motor)  
loadswilldamagecontrolandcouldcauseshock  
or fire hazard.  
SPECIFICATIONS  
Temperature Range: 40° to 85°F  
Differential: 1°F  
Switch Rating: Non-Inductive  
22A (5000W) 240VAC  
18A (5000W) 277VAC  
Switch Action: Open on rise  
Contact Structure: Double Line Disconnect - DPST  
INSTALLATION  
If the heating equipment manufacturer has made provi- 3. It should be mounted as far as possible from undesir-  
sions or recommendations for the location of this control,  
thenfollowthoseinstructions. Ifnot, thefollowingsugges-  
tions should be observed.  
able sources of heat and cold such as:  
a. Windows and doors  
b. Direct rays from sun  
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.  
c. Hot water or cold water pipes  
d. Adjoining outside walls  
2. It should be mounted on a partitioning wall, not on an  
outside wall.  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS RD., ST. LOUIS, MO. 63123  
(314) 577-1300, Fax (314) 577-1517  
PART NO. 37-5428C  
Replaces 37-5428B  
9724  
Printed in U.S.A.  
9999 HWY. 48, MARKHAM, ONT. L3P 3J3  
(905) 475-4653, FAX (905) 475-4625  
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WIRING  
All wiring must conform to local and national electrical codes and ordinances.  
The thermostat may be mounted in any standard 2" x 3"  
connections must be tight.  
electrical outlet box. For ease of installation use a deep 2. Push the lead wires into the outlet box and mount the  
type box.  
thermostat to the outlet box with screws provided.  
Take care not to push or damage the knob sens-  
ing element during installation.  
CAUTION  
USE WITH COPPER CONDUCTORS ONLY.  
3. Snap on the thermostat cover and turn knob to  
desired setting.  
1. Make electrical connection to thermostat leads with  
wire nuts or other local code approved devices. All  
Thermostat  
Note: Do not  
push on this knob  
because calibration  
will be changed  
if knob is bent.  
Mounting Screw  
60  
70  
50  
80  
LOAD  
LINE  
LINE  
Mounting Screw  
Cover  
Note: Breaks both sides of line in “OFF” position  
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