FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
DESCRIPTION
755-50
Electric Water Heater Control
INSTALLATION INSTRUCTIONS
PRECAUTIONS
WARNING
!
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.
CAUTION
!
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.
SPECIFICATIONS
This control is a dual-function control having a temperature control in
series with a high-limit control.
The temperature control is a normally closed SPST switch which opens
on a rise in temperature and will control one heating element.
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 resi-
dential type storage tank water heaters.
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 White-Rodgers warranty.
AC ELECTRICAL RATINGS
UL and CSA recognized for resistive loads.
www.white-rodgers.com
www.emersonclimate.com
PART NO. 37-5784B
Replaces 37-5784A
1308
Temp Control
Voltage
Limit Control
30 Amps
120-250 VAC
40 Amps
25 Amps
277 VAC
40 Amps
12.5 Amps
480VAC
25 Amps
Wiring
All wiring must conform to local and national electrical codes
and ordinances.
Connect in accordance with wiring diagrams provided by the equip-
ment manufacturer. If none are provided, the following represents
a typical installation.
Temperature Ratings:
Temperature control - Variable 90° to 150°F (32° to 66°C)
Limit control - Fixed 170°F (77°C) with manual reset
Single Element Circuit for Full
Power Disconnect Through
Both Power Conductors
Heating Element
L1
L2
1
2
1
2
3
4
Factory Installed
Jumper
INSTALLATION
Adjust temperature setting by inserting a screwdriver into open slot
and turning pointer to desired temperature on dial.
Adjustment Slot
150F
66C
125F/52C
90F
32C
SETTING THE DIAL
