White Rodgers 1A66W User manual

WHITE-RODGERS
Printed in U.S.A.
INSTALLATION INSTRUCTIONS
1A66/1A66W
ELECTRIC-HEAT THERMOSTAT
(Double Line Disconnect)
The Type 1A66/1A66W Electric Heat Thermostat is de-
signed for use on all types of electrical heating installa-
tionssuchascableheat,baseboards,wallinsertheaters,
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.
TheType1A66/1A66Wisintendedforuseon240or277
volts where local codes require that a double line discon-
nect thermostat be used.
Dial Setting: Knob may be set anywhere between 40°
and85°Fbysimplyturningknobsothat indicatoronknob
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.
Turningknob to“OFF”positionwillbreakbothsidesofline.
DESCRIPTION
FAILURETOREADANDFOLLOWALLINSTRUCTIONSCAREFULLYBEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
Operator: Save these instructions for future use!
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
[phone], Fax [phone]
9999 HWY. 48, MARKHAM, ONT. L3P 3J3
[phone], FAX [phone]
R
If the heating equipment manufacturer has made provi-
sions or recommendations for the location of this control,
thenfollowthoseinstructions.Ifnot,thefollowingsugges-
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. Itshouldbemountedasfaraspossiblefromundesir-
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
INSTALLATION
Switch Rating: Non-Inductive
22A (5000W) 240VAC
18A (5000W) 277VAC
Temperature Range: 40°to 85°F
Differential: 1°F
Switch Action: Open on rise
Contact Structure: Double Line Disconnect - DPST
SPECIFICATIONS
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. 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)
loadswilldamagecontrolandcouldcauseshock
or fire hazard.
All wiring must conform to local and national electrical
codes and ordinances.
To prevent electrical shock and/or equipment
damage,disconnectelectricpower tosystem,at
mainfuseorcircuitbreakerbox,untilinstallation
is complete.
PRECAUTIONS
NOTE: Only one side of line is broken during normal cycling of
this thermostat.
80
50
70
60
OFF
CAUTION
WARNING
PART NO. 37-5428C
Replaces 37-5428B
9724

2
WIRING
All wiring must conform to local and national electrical codes and ordinances.
The thermostat may be mounted in any standard 2" x 3"
electrical outlet box. For ease of installation use a deep
type box.
USE WITH COPPER CONDUCTORS ONLY.
1. Make electrical connection to thermostat leads with
wire nuts or other local code approved devices. All
connections must be tight.
2. Pushthe lead wiresintothe outlet boxandmount the
thermostat to the outlet box with screws provided.
Take care not to push or damage the knob sens-
ing element during installation.
3. Snap on the thermostat cover and turn knob to
desired setting.
50
60
70
80
Thermostat
Mounting Screw
Mounting Screw
Cover
Note: Breaks both sides of line in “OFF” position
Note: Do not
push on this knob
because calibration
will be changed
if knob is bent.
LINE
LINE
LOAD
BLACK BLACK
BLUE
BLUE
CAUTION