White Rodgers 11B18 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 are designed for use on hot water heating
installations. They have open-on-rise switch action and
are available with either fixed or adjustable differential.

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.

11B18

HOT WATER CONTROL

Open on Rise, Well-Immersion

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. 37-2068B

Replaces 37-2068A & 37-9199

9545

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 boiler manufacturer recommends a control location,
follow such recommendations. If none is offered, the
following information gives suggested locations.

When used for high limit service, the control should be
installed in the riser close to the boiler, or in a boiler
tapping that is near the top or hottest section of the boiler.
If the boiler is also used to heat domestic hot water, make
sure that the high limit control is not located in the section
of the boiler that contains the heat exchanger or piping for
domestic hot water.

When used for low limit or operator service, the control
should be located near that section of the boiler that

HEX NUT

MOUNTING STEM

CAPILLARY

BULB

KNOCKOUT PLUG

KNOCKOUT PLATE

Convertible Control converted to Vertical Model.

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

contains the heat exchanger or piping for domestic hot
water.

To remove the well from the control, loosen the set screw
in the large nut, then slide the well off to expose the bulb.
Screw the well into the proper tapping. Slide the bulb 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 or burner manufacturer recommends a wiring
diagram, then follow such recommendations.
If none is offered, these diagrams show suggested cir­cuits.

HIGH
LIMIT

Used as high limit control

THERMOSTAT

SILENT KNIGHT

GAS VALVE

AUX

2 3

TH TR

1 4

with Silent Knight gas
valve with plug-in pilot

TRANSFORMER

COIL

PLUG-IN

PILOT

TO

LINE

LINE

GND HOT

Used as high limit
control with
oil burner control

THERMOSTAT

LIMIT

CONTROL

2

FUSED
LINE
SWITCH

THERM PILOT

INTERMITTENT IGNITION
OIL BURNER CONTROL

LIMIT

CONTROL

TRANS

MOTOR

DIAPHRAGM

GAS VALVE

TRANS

AUTOMATIC

IF AUTOMATIC PILOT IS NOT USED,
CONNECT A JUMPER BETWEEN

PILOT

THE PILOT TERMINALS

THERMOSTAT

STACK

1

4

2

T

3

T

Used as high limit
control with
diaphragm gas valve

TRANSFORMER

TO

LINE