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  9. Emerson White-Rodgers 11B79-3 User manual

Emerson White-Rodgers 11B79-3 User manual

11B79-3
Combination Control
with E.C.O. Protection
FAILURETO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
INSTALLATION INSTRUCTIONS
The 11B79-3 combination control is a Hot Water Control
utilizing a thermostat and an E.C.O. (Energy Cut-Off)
device. The thermostat consists of a remote sensor and an
integral sensor. It is a temperature regulating device for use
in applications not exceeding 180°F (82°C). This model is
designed for use as direct immersion. No immersion well is
required.
The E.C.O. is a non-cycling manual reset device designed
to limit the system temperature to 205°F. It is mounted in an
integral well built into the immersion fitting.
PRECAUTIONS
SPECIFICATIONS
If in doubt about whether your wiring is millivolt, line or low voltage,
have it inspected by a qualified heating and air conditioning
contractor, electrician, or someone familiar with basic electricity
and wiring.
Do not exceed the specification ratings.
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.
www.white-rodgers.com
www.emersonclimate.com
PART NO. 37-7543A
1422
CAUTION
!
Do not short on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
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.
Shut off main gas to heating system until installation
is completed.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation.
Following installation or replacement,follow appliance
manufacturer's recommended installation and/or
service instructions to insure proper operation.
THERMOSTAT
Electrical Rating:
24 VAC - 0.75 Amp
0.25 to 1.0 VDC - 0.25 Amp
10 F.L.A., 60 L.R.A., 120 VAC
Switch Action: Open-on-Rise
Range: Adjustable from 120°to 180°F (50° to 82°C)
Differential: Fixed, 4°F (2.2°C)
ENERGY CUT-OFF (E.C.O.)
Electrical Rating:
24 VAC - 0.75 Amp
0.25 to 1.0 VDC - 0.25 Amp, 120 VAC
Switch Action: Open-on-Rise at 205°F (96°C)
Differential:
Non-cyling
Manual reset
ELEMENTS:
Case Element:
3/4 NPT
2-3/4" shank, 4-5/8" beyond thread
Remote Element:
3/4 NPT
Compression fitting on 1-1/2" stud
5-1/4" beyond stud
INSTALLATION
WIRING
SETTING TEMPERATURE
Remove the control that needs replacing. The 11B79 control
should be installed in the same location.
Apply pipe joint compound to the NPT threads of the control
box hex fitting. Carefully thread the control box by hand at the
desired location. As you thread the control box, do not allow
the capillary and remote element to swing about. This could
damage the control.
After threading the control box by hand, tighten the hex fitting
on the back of the control with a wrench until secure.
REMOTE ELEMENT INSTALLATION
To install the remote element, unscrew the locknut from the hex
nut (see fig. 1). Apply pipe joint compound to the hex nut and
thread into the tank at the location where the original element
was removed. With the compression fitting and locknut on the
element, insert the remote element bulb through the centre of
the hex nut.
CAUTION
!
When installing the control, take special care to avoid
any kinds of sharp bends in the capillary tubing of the
remote element.
Screw the locknut into the hex nut until hand-tight. Do not apply
joint compound on the compression fitting side of the hex nut.
Tighten with a wrench to compress the compression fitting.
Excessive capillary should be coiled and secured close to the
control to avoid any damage.
Wiring should be routed through the opened knockout on the
bottom of the control.Connect wires beneath the screw terminals
according to manufacturer's instructions.
All wiring should be done in accordance with local and national
electrical codes and ordinances.
Wire the new control the same as the control being replaced, or
follow equipment manufacturer's instructions for wiring.
The temperature adjusting dial is located in front of the switch
mechanism on the control. As shown in Fig. 3, a pointer at the
top of the dial indicated the temperature at which the thermostat
is to open. To change the temperature, rotate the dial until the
desired temperature is directly beneath the pointer. Do not
attempt to force the dial beyond the built-in stop.
The cut-out temperature of the E.C.O. is preset and cannot be
adjusted in the field.
White-Rodgers is a business
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
www.white-rodgers.com
www.emersonclimate.com
Ground Screw
Insulator
Torx Tamper
Resist
Screws (2)
.250 X .032
Male Spade
Te rminals (2)
Thermostat
Te rminal Screws (2)
ECO Cutout 205°F
Figure 2 - View with cover removed
Figure 1
REMOTE ELEMENT
Figure 1
Lock Nut
Compression
Fitting
Hex Nut
Pointer
Adjusting
Slot
Built-in
Stop
Figure 3
°F

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