White Rodgers 1131 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.

Type 1131 controls are designed for use on hot water
heating installations. They have single-pole, double-throw
switch action, offering open-on-rise terminals as well as
close-on-rise terminals. These controls may be used as a
high limit, low limit, circulator, or combination low limit­circulator control.

Models are available with either horizontal or vertical well,
and with either fixed or adjustable differential. 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 both
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.

THIS CONTROL 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.

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.)

TYPE 1131

HOT WATER CONTROL

S.P.D.T. Well-Immersion

INSTALLATION INSTRUCTIONS

DESCRIPTION

PRECAUTIONS

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.

WARNING

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

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.

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.

PART NO. 37-2071B

Replaces 37-2071 & 37-9195

9548

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,
then follow such recommendations. If none are offered
the following are suggested locations.

For high limit service, the control should be located in
the hottest part of the boiler. This is usually near the top
of the boiler. A high limit control should not be in the same
section of the boiler that contains the heat exchanger that
supplies domestic hot water.

For low limit or operating service, the control should be
so located that it responds to the temperature of that
section of the boiler that heats domestic hot water.

When used as a circulator control, it may be located
near the boiler outlet or riser.

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.

When used on a combination low limit and circulator
control, it should be located the same as suggested for

low limit service.
To remove the well from the control, loosen 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
back into the well, making sure that the bulb enters the
well as far as it will go. 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.

RED

COMMON

CLOSE ON RISE
OF TEMPERATURE

This control has a single-pole, double-throw, snap-action
switch. The top left-hand terminal (red) is the common
terminal. The top right-hand terminal (blue) has open-on­rise switch action. The bottom center terminal (white) has
close-on-rise switch action.

WHITE

BLUE

OPEN ON RISE
OF TEMPERATURE

Refer to the wiring diagram supplied by the boiler or
burner manufacturer, or to the suggested circuits
included with the primary control. The information
below shows the terminals to use for the various
applications.

Limit Control: When used as either a high limit
control or as a low limit control, use the open-on-rise
terminals, (red and blue).

Circulator Control: When used as a circulator control,
use the close-on-rise terminals, (red and white).

Combination Low Limit and Circulator Control: For
this application, all 3 terminals are used. The wiring
diagram on the next page shows a typical circuit for a
hot water system having a boiler with tankless domes­tic coil.

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