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INSTALLATION & OPERATION  
INSTALLATION AND OPERATING  
INSTRUCTIONS  
1). THERMOSTAT LOCATION  
For accurate temperature control and comfort, correct location is very  
important. On new installations, the guidelines listed below should be  
followed as closely as possible. When replacing an old thermostat,  
install the new one in the same location unless these conditions  
suggest otherwise.  
52021  
1. Locate the thermostat on an inside wall about five feet above the floor,  
where it is easy to install and adjust. It should be in a room that is used  
often, such as a family room.  
2. Do not install it where there are unusual heating conditions, such as  
direct sunlight, close to a lamp, radio, television, radiator, register, near  
a fireplace, or other heat producing appliance. Also, check for hot  
water pipes within the wall, or a stove on the other side of the wall.  
3. Do not locate in unusual cooling conditions, such as on an outside wall, or  
one separating an unheated room, or in drafts from stairwells, doors, or  
windows.  
4. Do not locate in a damp or humid area. This can shorten thermostat life  
due to corrosion.  
5. Do not locate where air circulation is poor, such as in a corner, alcove,  
or behind an open door.  
T20-1141SA  
HEATING ONLY THERMOSTAT  
6. Do not install until all construction work and painting have been  
completed.  
2) TOOLS REQUIRED  
3
Wirestripper or knife, drill with  
16" bit, screwdriver, level and a pencil.  
3) REMOVING OLD THERMOSTAT  
Please read all instructions carefully. As you complete each step, check  
50 60 70 80 90  
10 15 20 25 30  
the adjoining square .  
Disconnect electricity and turn off gas to the heater.  
Remove cover from old thermostat.  
Loosen all screws.  
Disconnect wires from thermostat, making sure they do not fall back inside  
the wall.  
LUX  
20  
25  
1650  
80  
30  
70  
10  
50  
90  
3
Strip insulation ⁄  
8
" from wire ends and clean off any corrosion.  
Fill wall opening with non-combustible insulation to prevent drafts from  
affecting thermostat.  
4) INSTALLING NEW THERMOSTAT  
Place new decorative wall plate (if supplied), Figure 3, over wall  
opening. Decorative wall plate can optionally be left off.  
Remove Front Cover of new thermostat by inserting a finger in the side  
of the thermostat and gently prying away each corner. Place Base,  
Figure 2, on wall plate over wall opening. Mark wall with pencil at  
mounting holes as shown in Figure 2. Now lay wall plate and base to  
the side.  
Drill two holes with  
3
16" bit, 1" deep.  
SPECIFICATIONS  
Insert plastic screw anchors into drilled holes, flush with wall surface.  
Bring wires through large hole in decorative wall plate and through  
Hole For Wires in Base.  
Fasten Base loosely to wall using two mounting screws. Place a level  
against the bottom of the Base, adjust until it is level and then tighten  
mounting screws to secure the Base.  
ELECTRICAL RATING  
24 Vac (30 Vac Maximum)  
SWITCH ACTION  
Open Contact Switch  
ANTICIPATOR RATING  
0.15A to 1.2A  
TEMP ERATURE RANGE  
50°F to 90°F  
LUX PRODUCTS CORPORATION  
Mt. Laurel, New J ersey, 08054 USA  
© COPYRIGHT 2006 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED  
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Attach wires to terminal screws shown in Figure 2. (Either wire to  
either terminal) Push excess wire back into wall opening.  
Find anticipator setting on old thermostat. Setting on new  
thermostat should be the same. Do this by carefully sliding the  
long pointer on the anticipator over the desired number. If old  
anticipator setting cannot be determined, look on gas control on  
furnace, or set it at .6. During heating season, furnace should  
operate about five times an hour. If adjustments are necessary,  
move heat anticipator pointer slightly and recheck. NOTE: Set  
pointer to 1.2 for millivolt systems.  
FIGURE 3  
DECORATIVE WALL PLATE  
Attach front cover, Figure 1, to base.  
Turn electricity and gas back on and set pointer on top of  
thermostat to desired temperature.  
A thermostat can only control temperature near it. If  
you find that it is uncomfortable some distance away  
from the thermostat, change the setting in order to  
compensate for this.  
FIGURE 1 FRONT COVER  
TECHNICAL ASSISTANCE  
If you have any problems installing or using this thermostat,  
please carefully and thoroughly review the instruction manual.  
If you require assistance, please contact our Technical  
Assistance Department at 856-234-8803 during regular  
business hours between 8:00AM and 4:30PM Eastern  
Standard Time, Monday through Friday. You can also receive  
technical assistance online anytime day or night at  
to the most common technical questions, and also permits you  
to email your questions to our technical support staff at your  
convenience.  
WARRANTY  
Limited Warranty: If this unit fails because of defects in  
materials or workmanship within three years of date of original  
purchase, LUX Products Corporation will, at its option, repair  
or replace it. This warranty does not cover damage by  
accident, misuse, or failure to follow installation instructions.  
Implied warranties are limited in duration to three years from  
date of original purchase. Some states do not allow limitations  
on how long an implied warranty lasts, so the above limitation  
may not apply to you. Please return malfunctioning or defective  
units to the participating retailer from which purchase was  
made, along with proof of purchase. Please refer to  
FIGURE 2 BASE  
MOUNTING HOLE  
UP  
"TECHNICAL ASSISTANCE" before returning thermostat.  
Purchaser assumes all risks and liability for incidental and  
consequential damage resulting from installation and use of  
this unit. Some states do not allow the exclusion of incidental  
or consequential damages, so the above exclusion may not  
apply to you. This warranty gives you specific legal rights and  
you may also have other rights which vary from state to state.  
Applicable in the U.S.A. only.  
ANTICIPATOR  
.15  
E
LONG  
POINTER  
.5  
.3  
.4  
CAPTIVE  
SCREW  
RECYCLING  
NOTICE  
This product does not contain mercury. However, this  
product may replace a unit which contains mercury and  
should not be disposed of in the trash. Contact your local  
waste management authority for proper disposal  
instructions for mercury in a sealed glass tube. If you  
have any questions, please call (856) 234-8803  
MOUNTING  
HOLE  
HOLES FOR WIRES  
CAPTIVE  
SCREW