White Rodgers 756-50 User Manual

756-50

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.

Electric Water Heater Control

INSTALLATION INSTRUCTIONS

DESCRIPTION

This control is a dual-function control having a tempera­ture regulating control in series with a high-limit control.

The temperature control is a SPDT switch which opens on
a rise in temperature and will control one or two heating
elements.

THIS CONTROL MUST BE INSTALLED BY A QUALI­FIED INSTALLER.

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.

This control has been accurately calibrated at the factory.
Any attempt to re-calibrate this control will void the White­Rodgers warranty.

WARNING

!

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

If in doubt about whether your wiring is millivolt,
low or line voltage, have it inspected by a quali­fied heating and air conditioning contractor or a
licensed electrician.

The limit control is a normally closed DPST switch which
opens on a rise in temperature to limit the maximum
allowable temperature. It has manual reset.

Both switches are calibrated to meet the requirements for
typical residential type storage tank water heaters.

PRECAUTIONS

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.

Label all wires prior to disconnection when ser­vicing controls. Wiring errors can cause improper
and dangerous operation.

Following installation or replacement, follow
appliance manufacturers’ recommended instal­lation/service instructions to insure proper op­eration.

AC ELECTRICAL RATINGS

UL and CSA recognized for resistive loads.



Temp Control Voltage Limit Control

 30 amps 120-250 VAC 40 amps
 25 amps 277 VAC 40 amps
 12.5 amps 480 VAC 25 amps

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398

SPECIFICATIONS

Temperature Ratings:

Temperature control - Variable 90° to 150°F (32° to

66°C)

Limit control - Fixed 170°F (77°C) with manual reset

PART NO. 37-5785A

Printed in U.S.A.

9714

INSTALLATION

Wiring

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

Connect in accordance with wiring diagrams provided by the equipment manufacturer. If none are provided,
the following represents a typical installation.

L1

L1

L2

Factory

Installed

Jumper

1
2

1
2

Heating Element

3
4

4

NOTE: Terminal 4
 not used

SIngle Element Circuit for Full
Power Disconnect Through
Both Power Conductors

Wiring Diagram for Typical Two-Element
Residential Electric Storage Water
Heater, Non-Simultaneous Operation.

Factory

Installed

Jumper

Upper Heating

Additional

Type 755-1

Temperature

Double Element Limited Demand
Circuit for Full Power Discon­nect Through Both Power Con-

Heating Element

ductors

Element

Control

1
2

1
2

1
2

Lower

L2

3
4

4

SETTING THE DIAL

Adjust temperature setting by inserting a screwdriver into
open slot and turning pointer to desired temperature on
dial.

Adjustment Slot

150°F

66°C

125°F/52°C

90°F

32°C