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XF
G
W1
4
W
B*
W2
RH
V
R
W1 A Y2 O BW2CG Y1 RC RH
HEATING ONLY (2-WIRES = USE “RH” & “W1”)
Factory RH-RC Jumper Wire Installed
#12, 3, 4, 5 WIRES
C
HEATER
STAGE
1
STAGE
2
FAN
SYSTEM 24V
TRANSFORMER
SYSTEM COMMON
FAN WIRE
MAY NOT BE
PRESENT IN
ALL SYSTEMS
O
P
T
I
O
N
A
L
RH
RC
V
R
Y1
6
Y
XF
G
W1
4
W
B*
W1 A Y2 O BW2CG Y1 RC RH
1-HEAT AND 1-COOL (NON Heat-Pump)
Factory RH-RC Jumper Wire Installed
#4
C
FAN
SYSTEM 24V
TRANSFORMER
SYSTEM COMMON
HEATER
AIR
CONDITIONER
4, 5 WIRES
O
P
T
I
O
N
A
L
Y1
6
Y
XF
G
W1
4
W
B*
W2
RH
V
R Y2
W1 A Y2 O BW2CG Y1 RC RH
2-HEAT AND 2-COOL (NON Heat-Pump)
Factory RH-RC Jumper Wire Installed
#5
C
HEATER
STAGE
1
STAGE
2
FAN
SYSTEM 24V
TRANSFORMER
SYSTEM COMMON
AIR CONDITIONER
STAGE
1
STAGE
2
4, 5, 6, 7 WIRES
O
P
T
I
O
N
A
L
RC
RH
V
R
Y1
6
Y
X
B*
C
W3
W1
W
W2
F
G
O
W1 A Y2 O BW2CG Y1 RC RH
HEAT PUMP System (WITH EMERGENCY HEAT)
#8
FAN
SYSTEM 24V
TRANSFORMER
REVERSING
VALVE
AUX / EMERG.
HEAT
SYSTEM COMMON
HEAT PUMP
5, 6 WIRES
O
P
T
I
O
N
A
L
** Use “O” or “B” Terminals,
Never Both
Factory RH-RC Jumper Wire Installed
CUSTOMER INSTALLED Y1-W1 Jumper Wire
CAUTIONS AND WARNINGS:
• The thermostat requires batteries to operate and failure or sub-
standard performance of the batteries may impair or prevent the
correct operation of the thermostat. Use Duracell or Energizer alkaline
batteries ONLY for all Lux thermostats requiring batteries. BE SURE TO
CHANGE THE BATTERIES AT LEAST ONCE A YEAR. Failure to follow
these battery instructions could result in property damage and/or
personal injury.
• The electrical rating for this thermostat is 1.5 Amps per terminal, with a
maximum total load of 3.0A for all terminals combined.
• The thermostat contains parts which may wear out through use and are
susceptible to failure if over-loaded or used in a manner other than as
indicated in the documentation.
• Check unoccupied residences regularly to ensure that all systems are
operating properly.
• Check any heating/air-conditioning system including this product
before operation and at regular intervals.
• Electrical interference, static electricity, failure or substandard
performance of batteries, wiring defects in the installation and/or
characteristics of the connected HVAC devices may prevent the system
from regulating heating and cooling as anticipated.
• The thermostat is a sensitive device and dropping the product can
cause damage to critical components. If the product is dropped or
shaken violently during transport or installation then it should be
replaced immediately.
• Persons with physical or mental limitations may not be able to
promptly respond to a malfunction of the heating/air-conditioning
system.
• All residents should be made aware of the potential in any system for
malfunctions that could cause continuous heating or cooling and
should be familiar with the operation and location of the
heating/cooling appliance on/off switch.
• Read the instruction manual completely before installing the
thermostat. Additional information is available at our website
luxproducts.com. You should consult a qualified HVAC technician or
an electrician if you do not fully understand the installation
instructions.
WIRING DIAGRAM NOTES:
• Label every wire terminal designation on your existing thermostat
wiring before removing your old thermostat.
• Ignore the color of the wires since they may not comply with any
standard. Please connect wires using the terminal letter designations.
• WARNING: All wiring must conform to the local codes and ordinances
that are in your particular location.
• If the information provided in the following wiring diagrams does not
clearly represent or match your system, please refer to the full version
of the manual which can be obtained from our website, or contact us
before removing your existing thermostat wires.
• All of the dashed wires shown in the wiring diagrams are either
optional, or their usage depends upon your specific system type or
brand. For example: Diagram #1 shows the fan wire as optional. If
your system does not have a fan, than this terminal will not be used.
• The optional “C” terminal is used for powering the thermostat by the
24-volt system, using the System Common wire. This can be used
alone, or in addition to installing batteries as a backup. NOTE:
connecting the System Common wire to the thermostat is not
necessary for heating and cooling to function properly.
• If your old thermostat has both a “Y” and “C” wire both present, then
“C” is most likely a System Common wire.
• For Heat Pump systems, you will use either the “O” terminal or the “B”
terminal on this thermostat, but not both. If your old thermostat has
both an “O” and a “B” wire present, then “B” is likely a System
Common wire and may be connected to the “C” terminal. Connecting
a System Common wire to this thermostat’s “B” terminal may damage
the thermostat, and also your heating and cooling system.
• Some Heat Pump systems have a wire for AUX electric heat (usually
W2), and also a separate wire for Emergency electric heat (usually E).
This thermostat uses the W2 terminal for both AUX and Emergency
Heat. Tape off your “E” wire, and confirm that all components function
without it.
TX9100U QUICK START WIRING GUIDE
**NOTE: The Black Terminal Letters Shown Below Are Standard, The Gray Terminal Letters Are Brand-Specific
53000