White Rodgers 1687-9 Installation Instructions

TEMPERATURE CONTROL

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.

This control is designed for use on equipment that re­quires a closed circuit for both rise and fall in temperature.
The single pole, double throw switch action offers both
open-on-rise terminals as well as close-on-rise terminals.

THIS CONTROL MUST BE INSTALLED BY A QUALI­FIED INSTALLER.

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.

If in doubt about whether your wiring is millivolt,
low or line voltage, have it inspected by a quali­fied heating and air conditioning contractor or a
licensed electrician.

SPDT Remote Bulb

INSTALLATION INSTRUCTIONS

DESCRIPTION

This control has capillary tubing between the temperature
sensitive bulb and the switch mechanism, permitting the
switch mechanism to be mounted at any convenient
location while the temperature sensitive bulb is located in
the fluid or medium being controlled.

PRECA UTIONS

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.

Label all wires prior to disconnection when ser­vicing controls. Wiring errors can cause improper
and dangerous operation.

Following installation or replacement, follow
appliance manufacturers’ recommended instal­lation/service instructions to insure proper
operation.

The switch mechanism of this control may be mounted in
any location, provided that the temperature and humidity
of the air in which it is located do not cause a condensation
on the switch parts.

The sensitive element, or “bulb”, should be located in the
average temperature of the controlled area.

Capillary tubing should be led over a path that protects it
from damage from blows, cuts, etc., and should be
installed without kinking or twisting. The tubing should be

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123-5398
[phone], FAX [phone]

9999 HWY. 48, MARKHAM, ONT. L3P 3J3
[phone], FAX [phone]

Printed in U.S.A.

INSTALLATION

attached to some surface at frequent intervals along its
length, and should not hang loosely. Excess tubing should
be coiled and secured at a convenient protected location
close to the switch mechanism.

The bulb should be handled with reasonable care, as a
dent or sharp bend may change the calibration and cause
the control to cycle at a temperature different from the dial
setting.

PART NO. 37-1637C

Replaces 37-1637B

9722

Wiring

All wiring must conform to local and national electrical codes and ordinances.

Connect in accordance with the wiring diagrams provided by the equipment manufacturer.

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 an open­on-rise switch action. The bottom center terminal (white)
has close-on-rise switch action.

INSTALLATION AS AN OUTDOOR BULB

When used as a changeover control or outdoor thermo­stat, the bulb of this control should be located to measure
the actual outdoor air temperature. A mounting bracket is
provided for mounting the bulb.

The mounting bracket should be fastened to some conve­nient outside part of the building that is shielded from the
direct rays of the sun, the direct fall of rain and snow, and
sufficiently above ground to keep it out of snow and ice.

The underside of the eaves or overhang of a NORTH or
NORTHEAST roof is a good location. It should be ex­posed to the circulation of air and wind.

COMMON

CEILING

RED

WHITE

CLOSE ON RISE
OF TEMPERATURE

BLUE

OPEN ON RISE
OF TEMPERATURE

ROOF

SETTING THE DIAL

The fixed indicator (B) points to temperature at which the
“R-B” contacts close and the “R-W” contacts open. Follow
these instructions to set the dial.

1. Insert a screwdriver in the adjusting slot (A) and turn
the dial until the fixed indicator (B) points to the lowest
temperature of the cycle.

2. Turn the differential adjusting screw (C) until the
moveable indicator (D) points to the highest tempera­ture of the cycle.

“A” ADJUSTING

SLOT

MOUNTING
BRACKET

OUTDOOR BULB

“B” FIXED INDICATOR

“C” DIFFERENTIAL

ADJUSTING SCREW

“D” MOVABLE INDICATOR

2