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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