White Rodgers 11D31-1, 11D18-1 Installation Instructions

11D05, 11D18, 11D31, 11D55

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, close on rise, or S.P.D.T.
switch action and are available with either fixed or adjustable
differential.

These controls are shipped with the bulb and capillary in the
horizontal position. 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 is available with open-on-rise manual reset
feature. Most controls can be used on either horizontal or
vertical well installation.

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 White-Rodgers
warranty.

Convertible controls have a knockout plate on back of case
(secured by 2 screws that hold well clamp). To convert from
Horizontal to Vertical:

1. Remove control cover.

2. Loosen 2 clamp screws.

3. Swing capillary down through slot into bottom knockout.

4. Secure knockout plate to back of case by sliding screws
through keyhole slots on bottom of case.

WELL IMMERSION

HOT WATER CONTROL

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

CONVERSION ADAPTER

CAPILLARY

BULB

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.

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.

EXTENDING CAPILLARY

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

PART NO. 37-2561B

Replaces 37-2561A & 37-9461

9549

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 contains the heat

WIRING

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

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.

11D05 .................... CLOSE ON RISE

11D18 .................... OPEN ON RISE

11D31 .................... S.P.D.T.

11D55 .................... OPEN ON RISE (manual reset)

SETTING THE CONTROL

CONTROLS WITH ADJUSTABLE DIFFERENTIAL

1. Insert a screwdriver in the centre slot and turn the dial until

the right hand indicator “B” points to the lowest temperature
of the cycle.

2. Turn the differential adjusting screw “C” until the left hand

indicator “D” points to the highest temperature of the cycle.

The left-hand indicator points to the temperature at which the
contacts open on high limit and low limit applications. On
circulator applications, the left-hand indicator points to the
temperature at which the circulator will start.

On combination low limit and circulator applications, the
left-hand indicator points to the temperature at which the low
limit stops the burner and permits the circulator to run.

“B” FIXED INDICATOR

“F” STOP TAB

“A” ADJUSTING

SLOT

ADJUSTABLE DIFFERENTIAL

(CUT-IN POINT)

“C” DIFFERENTIAL ADJUSTING

“D” MOVABLE INDICATOR

“E” STOP SCREW

SCREW

(CUT-OUT POINT)

RED

COMMON

CLOSE ON RISE
OF TEMPERATURE

WHITE

BLUE

OPEN ON RISE
OF TEMPERATURE

S.P.D.T.

CONTROLS WITH FIXED DIFFERENTIAL

Insert a screwdriver in centre slot “A” and turn the dial until the
fixed indicator “B” points to the highest desired temperature of
the cycle.

The fixed indicator points to the temperature at which the
contacts open on high limit and low limit applications. On
circulator applications, the fixed indicator points to the tem­perature at which the circulator will start.

On combination low limit and circulator applications, the
fixed indicator points to the temperature at which the low limit
stops the burner and permits the circulator to run.

CONTROLS WITH ADJUSTABLE STOPS

1. Loosen stop screw (E) with enclosed wrench.

2. Set dial to original equipment manufacturer's specification.

3. Without moving the dial, move stop tab (F) against indica­tor.

4. Retighten stop screw (E).

CAUTION

Setting stop higher than control being replaced could
cause personal injury and/or property damage.

“F” STOP TAB

“E” STOP SCREW

“A” ADJUSTING

FIXED DIFFERENTIAL

“B” FIXED

INDICATOR

SLOT

2