White Rodgers 11B18 - Manual

Printed in U.S.A.

PART NO. 37-2068B

Replaces 37-2068A & 37-9199

9545

Label all wires prior to disconnection when ser-
vicing controls. Wiring errors can cause im-
proper and dangerous operation.

Following installation or replacement, follow
appliance manufacturer’s recommended instal-
lation and/or service instructions to insure proper
operation.

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 compo-
nents could cause the control to malfunction.

This control has been accurately calibrated at the factory.
Any attempt to calibrate this control will void the White-
Rodgers warranty.

CAUTION

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.

11B18

HOT WATER CONTROL

Open on Rise, Well-Immersion

INSTALLATION INSTRUCTIONS

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 enclo-
sure. This control can be used with either a standard or
extended shank well, on either horizontal or vertical well
installations.

PRECAUTIONS

DESCRIPTION

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.)

3. Pull Well Mounting Stem away from case and remove

Knockout Plate.

4. Swing capillary down through slot into bottom knock-

out.

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.

CONVERTIBLE CONTROLS

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 instal-
lation is complete.

CAUTION

Do not use on circuits exceeding specified
voltages. Higher voltages will damage control
and could cause shock or fire hazard.

WARNING

WHITE-RODGERS

Operator: Save these instructions for future use!

WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
(314) 577-1300,

FAX (314) 577-1517

9999 HWY. 48, MARKHAM, ONT. L3P 3J3
(905) 475-4653, FAX (905) 475-4625