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© COPYRIGHT 2006 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED

LUX PRODUCTS CORPORATION • Mt. Laurel, New Jersey 08054, USA

I M P O R T A N T !

Please read all instructions carefully before beginning instal-

lation and save for future reference.  Before removing any

wiring from your existing thermostat, its wires must be labeled

with their terminal designations.  Ignore the color of the wires

since they may not comply with any standard.

Thank you for your confidence in our product. To obtain the best results

from your investment, please read this manual and acquaint yourself with
your purchase before installing your new thermostat. Then follow the
installation procedures, one step at a time. This will save you time and
minimize the chance of damaging the thermostat and the systems it
controls. These instructions may contain information beyond that required
for your particular installation. Please save for future reference.

PSD111 SERIES

DIGITAL ELECTRONIC THERMOSTAT

HEAT

OFF

COOL

MO

Set Temperature

Choose Heat or Cool

Installs Easily

Easy as

1–2–3

Complete, Easy To Read

INSTALLATION AND

OPERATING INSTRUCTIONS

COMPATIBILITY

The unit can be used with

most 24 volt gas, oil or electric
heating and air conditioning
systems, gas millivolt heating
systems, and single stage heat
pumps. It cannot be used with
120 volt heating systems or two
stage heat pumps. Ask your
dealer for other LUXPRO
thermostats to control those
systems.

FEATURES

Slim design may be vertically or
horizontally mounted

Large easy to read backlit display

Fan switch for system or continuous
fan operation

Simple temperature Up or Down keys
will display and adjust the Set 
Temperature.

Temperature displays in F° or C°

Temperature differential SWING settings
of 0.25 and 0.5

Selectable 2 or 5-Minute Minimum
Run/Off time provides short cycle and
compressor protection

TEMP UP

MODE

FAN

MODE

TEMP DOWN

BACKLIGHT

RESET

WARNING:

Use Energizer

®

or DURACELL

®

Alkaline Batteries Only.

Energizer

®

is a registered trademark of Eveready Battery Company, Inc.

DURACELL

®

is a registered trademark of The Gillette Company, Inc.

52000

Patent # 6,951,306

In the winter, set the system switch to 

HEAT to control your heating 

system.

In the summer, set the switch to 

COOL to control your air conditioner.

Press either the 

TEMPERATURE UP or DOWN key in order to show 

the current 

SET TEMPERATURE.

Press 

TEMPERATURE UP or DOWN keys again until your desired

temperature is displayed. The display will show the current room
temperature again after two seconds.

Press the light bulb button to illuminate the display. Adjusting the
temperature will keep the display lit until no button has been pressed 
for over ten seconds.

In spring and fall or when windows are open, you can set the system
switch to 

OFF.

Setting the 

FAN switch to AUTO automatically runs your system’s fan

during heating and cooling.

Setting the 

FAN switch to ON runs your system’s fan continuously even

without heating or cooling.

N O T E

The FAN switch works only if your system provides a wire for the

thermostat’s “G” terminal.

INSTALLATION

Please read all instructions carefully before beginning installation.

C A U T I O N

Turn off electricity to the appliance before installing or

servicing thermostat or any part of the system. Do not turn

electricity back on until work is completed.

Do not short (jumper) across electric terminals at control on furnace or 
air conditioner to test the system. This will damage the thermostat and 
void your warranty.

All wiring must conform to local codes and ordinances.

This thermostat is designed for use with 24 volt and millivolt systems.
The thermostat should be limited to a maximum of 1.5 amps; higher 
current may cause damage to the thermostat. If you are in doubt, call 
your HVAC contractor.

Your thermostat is a precision instrument. Please handle it with care.

OFF

TOOLS REQUIRED

#1 Phillips screwdriver (small)

Drill with 3/16-in. (4.8mm) bit

Wire stripper/cutter

THERMOSTAT LOCATION

On replacement installations, mount the new thermostat in place of the

old one unless the conditions listed below suggest otherwise. On new
installations, follow the guidelines listed below.

Remember that your PSD111 may be mounted vertically or horizontally
when determining the optimal location.

Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the 
floor, and in a room that is used often.

Do not install it where there are unusual heating conditions, such as: in
direct sunlight; near a lamp, radio, television, radiator, register, or 
fireplace; near hot water pipes in a wall; near a stove on the other side 
of a wall.

Do not locate in unusual cooling conditions, such as: on a wall 
separating an unheated room; or in a draft from a stairwell, door, or 
window.

Do not locate in a damp area. This can lead to corrosion that will 
shorten thermostat life.

Do not locate where air circulation is poor, such as: in a corner or an 
alcove; or behind an open door.

Do not install the unit until all construction work and painting has been
completed.

OPERATING INSTRUCTIONS

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