White Rodgers 11B05 User Manual

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.

These controls have close-on-rise switch action and are
designed for use on hot water heating installations. They
prevent operation of the circulator or unit heater fan if the
boiler water is not hot enough for proper heating.

Models are available with either horizontal or vertical well.
Some of these models also have excess capillary stored
within the enclosure, permitting them to be used with wells
having either a standard or extended shank.

Another model, ideal for replacement purposes, has a
slotted case and excess capillary stored within the enclo­sure. This control can be used with either a standard or
extended shank well, on either horizontal or vertical well
installations.

THESE CONTROLS MUST BE INSTALLED BY A
QUALIFIED INSTALLER.

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.

This control has been accurately calibrated at the factory.
Any attempt to 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.

11B05

HOT WATER CONTROL

Reverse Acting – Well-Immersion

Adjustable Differential

INSTALLATION INSTRUCTIONS

DESCRIPTION

PRECAUTIONS

CAUTION

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.

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 complete.

Convertible controls have a Knockout Plate on back of

case (secured by Hex Nut on Horizontal models, and by
Knockout Plug on Vertical models). To convert from
Horizontal to Vertical:

1. Remove control cover. Then remove bottom knockout.

2. Remove Hex Nut (inside control) from Well Mounting
Stem. (To loosen, hold Hex Nut inside while turning
Hex Nut on back of control counterclockwise.)

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]

Printed in U.S.A.

CONVERTIBLE CONTROLS

3. Pull Well Mounting Stem away from case and remove
Knockout Plate.

4. Swing capillary down through slot into bottom knock­out.

5. Secure Knockout Plate to back of case by using
Knockout Plug provided in envelope.

6. Insert Well Mounting Stem into bottom knockout and
tighten Hex Nut (inside control) securely.

PART NO. 37-2070B

Replaces 37-2070 & 37-9197

9546

CONVERTIBLE CONTROLS CONT.

NOTE

To convert from Vertical to Horizontal model, remove
Knockout Plug and Plate. Remove Hex Nut (inside con­trol) and swing capillary upward into back knockout. Place
Knockout Plate beneath Hex Nut on back of control and
tighten Hex Nut (inside control). If bottom knockout is not
used for wiring, insert Knockout Plug.

EXTENDING CAPILLARY

Some controls have excess stored capillary which may be
extended for use with an extended shank well. Use reason­able care when straightening and forming the capillary.

INSTALLATION

If the manufacturer of the boiler recommends a control
location, follow such recommendations.

If none are offered, locate the control at the top of the
boiler near an outlet pipe or in the outlet pipe.

To remove the well from the control, loosen the set screw
in the large nut, then slide the well off which exposes the
bulb. Screw the well into the proper tapping. Slide the bulb

HEX NUT

MOUNTING STEM

CAPILLARY

BULB

Convertible Control converted to Vertical Model.

KNOCKOUT PLUG

KNOCKOUT PLATE

With the capillary fully extended, the bulb should slide all
the way to the end of the well.

back into the well, making sure that the bulb enters the
well as far as it will go and tighten the set screw.

CAUTION

Do not dent or bend the bulb as this will prevent
it from fitting into the well properly.

WIRING

All wiring should be done in accordance with local and national electrical codes and ordinances.

If the boiler manufacturer recommends a wiring diagram, then follow such recommendations. If none is offered, these
diagrams show suggested circuits.

LINE VOLTAGE

THEMOSTAT

HOT
LINE

N

TYPE

11B05

FAN

MOTOR

Used as Hot Water Control to prevent unit heater fan from

HOT
LINE

N

Used as Hot Water Control to start and stop the circulator.

TYPE

11B05

CIRCULATOR

MOTOR

operating until coils are warm.

SETTING THE CONTROL

CONTROLS WITH ADJUSTABLE DIFFERENTIAL

The movable indicator points to the temperature at which
the contacts close. The fixed indicator points to the
temperature at which the contacts open. The difference
between these two indicators is the differential.
To set the control:

1. Use a screwdriver in the adjusting slot (A) on the front
of the control to turn the dial so that the fixed indicator
(B) points to the temperature at which the contacts will
open.

2. Turn the differential adjusting screw (C) until the
movable indicator (D) points to the temperature at
which the contacts will close.

“B” Fixed indicator

(cut-out point)

“C” Differential

adjusting screw
“D” Movable indicator

(cut-in point)

“A” Adjusting

slot

2