Lux Products Thermostat PSDH121 User Manual

OPERATING INSTRUCTIONS  
Complete, Easy To Read  
INSTALLATION AND OPERATING INSTRUCTIONS  
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In the winter, set the system switch to HEAT to control your system while  
heating.  
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In the summer, set the switch to COOL to control your system while cooling.  
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Press 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.  
PSDH121 SERIES  
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DIGITAL ELECTRONIC HEAT PUMP THERMOSTAT  
G
Press the light bulb button to illuminate the display. Adjusting the temperature  
Easy as  
HEAT  
OFF  
COOL  
will keep the display lit until no button has been pressed for over ten seconds.  
G
1–2–3  
In spring and fall or when windows are open, you can set the system switch  
Installs Easily  
Choose Heat or Cool  
Set Temperature  
to OFF.  
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LUX PRODUCTS CORPORATION • Mt. Laurel, New Jersey 08054, USA  
43368  
Setting the FAN switch to AUTO automatically runs your system’s fan during  
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.  
heating and cooling.  
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Setting the FAN switch to ON runs your system’s fan continuously even  
without heating or cooling.  
I M P O R T A N T !  
Please read all instructions carefully before  
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Setting the Mode switch to EMER (emergency heat) runs your Emergency  
heating system rather than the heat pump.  
beginning installation and save for future reference.  
Before removing any wiring from your existing thermostat, its wires  
must be labeled with their terminal designations.  
N O T E  
The FAN switch works only if your system provides a wire for a thermostat’s “G” terminal.  
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.  
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. ***  
OFF  
COMPATIBILITY  
TEMP UP  
MODE  
G
Do not short (jumper) across electric terminals at control on furnace or air  
LUX PSDH121 was designed  
for use with single stage heat  
pump systems with auxiliary  
and/or emergency heat. These  
systems are typical known as  
2-stage heat one stage cool heat  
pump systems.  
conditioner to test the system. This will damage the thermostat and void  
your warranty.  
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All wiring must conform to local codes and ordinances.  
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This thermostat is designed for use with 24 volt 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.  
FAN  
MODE  
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Your thermostat is a precision instrument. Please handle it with care.  
BACKLIGHT  
RESET  
TEMP DOWN  
TOOLS REQUIRED  
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#1 Phillips screwdriver (small)  
FEATURES  
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Drill with 3/16-in. (4.8mm) bit  
G
Slim design may be vertically or horizontally  
mounted  
G
Wire stripper/cutter  
THERMOSTAT LOCATION  
G
G
Large easy to read backlit display  
Fan switch for system or continuous fan  
operation  
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.  
G
G
Emergency Heat Switch  
Simple temperature Up or Down keys will  
display and adjust the Set Temperature.  
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Remember that your PSDH121 may be mounted vertically or horizontally  
when determining the optimal location.  
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Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the floor,  
G
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and in a room that is used often.  
Temperature displays in F° or C°  
Temperature differential SWING settings of  
0.25 and 0.5  
G
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.  
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Selectable 2 or 5-Minute Minimum Run/Off time provides short cycle and  
compressor protection  
G
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.  
G
Do not locate in a damp area. This can lead to corrosion that will shorten  
thermostat life.  
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Do not locate where air circulation is poor, such as: in a corner or an alcove;  
or behind an open door.  
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Do not install the unit until all construction work and painting has been  
completed.  
© COPYRIGHT 2004 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED  
 
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NEW THERMOSTAT AND  
CORRESPONDING TERMINALS  
TAPE OFF  
(NOT USED)  
BATTERIES/MAINTENANCE  
HEAT PUMP SYSTEM  
WITH COMMON TERMINAL  
1. Remove fresh batteries from their carton.  
2. Remove body of thermostat as described during installation.  
3. Remove the used batteries if present.  
4. Install two new Energizer® or DURACELL® "AA" size alkaline batteries in the  
battery compartment. Observe the polarity marking shown in the compartment.  
WARNING: Use Energizer® or DURACELL® Alkaline Batteries Only.  
5. Place the body back on the wall.  
6. Using a small Phillips screwdriver press the RESET button which is between  
the Up/Down arrow button. Within 90 seconds the thermostat will begin to  
display the room temperature.  
BATTERY COMPARTMENT  
N O T E  
REPLACE BATTERIES WHEN LOBAT APPEARS IN THE DISPLAY  
OR AT LEAST ONCE A YEAR.  
WIRING DIAGRAMS  
These diagrams are provided for new installations or un-referenced wires.  
TYPICAL HEAT PUMP WITH AUX HEAT  
ALSO WIRED AS EMERGENCY HEAT  
TECHNICAL SERVICE  
USE "B" OR "O"  
BUT NOT BOTH  
If you have any problems installing or using this thermostat, please reread the  
instructions carefully. Technical Service is available through our Technical  
Assistance Dept. If you require assistance, please call our offices between 8:00  
a.m. and 4:30 p.m. Eastern Standard Time, Monday through Friday. The number  
E
Y
HEAT PUMP  
COMPRESSOR  
B
B
O
CHANGEOVER  
OR  
WARRANTY  
VALVE  
O
Limited Warranty: If this unit fails because of defects in materials or  
workmanship within one year of date of original purchase, LUX 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 one year 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  
Technical Service Section 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.  
AUX/EMER  
W2  
R
HEAT  
24VAC  
AC  
XFMR  
LINE  
G
FAN  
C
OPTIONAL  
COMMON  
NOTE: ADD JUMPER SHOWN BETWEEN "W2" AND "E"  
IF "E" IS NOT PRESENT  
© COPYRIGHT 2004 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED  
 
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