Trane Touchscreen Programmable Thermostat User Manual

							BAS-SVX44A-EN11
Installation and Wiring
Figure 1.Security screw removal and cover release
2. Push the cover thumb tab to release the cover from the backplate as shown above.
3. Route the wires through the opening in the backplate as shown below. Wires should be marked to
 ensure proper connection to terminals.
Figure 2. Wire routing, mounting, and mounting dimensions
4. If mounting the backplate directly to a wall surface, hold the backplate against the surface andthen
 level and mark the fastener locations.
5. Secure the backplate using appropriate fasteners (refer to the section, “Mounting Surfaces,”
p. 8.) The thermostat must be level and plumb to ensure proper air movement through the
thermostat enclosure.
Security Screw
NOTE: If the
security screw is
installed, remove
it before
attempting to
remove the cover.
Cover thumb tab
DimensionProgrammable  Touch-screen
H 3.3 in. (85 mm)
W 5.9 in. (150 mm) D 1.3 in. (33 mm)
M 3.3 in. (85 mm)
W
H D
M
Two (2) slots for standard #8-32 (M4), 
2”x4” junction box mounting screws. 
						

							12BAS-SVX44A-EN
Installation and Wiring
Wiring and Wiring Diagrams
Wiring
WARNING
Hazardous voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power cannot be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
NOTICE
Equipment damage!
Applying excessive voltage to the thermostat can permanently damage it.
Note: Terminal
 blocks are included with the mounting hardware contained in a small plastic bag
(new installation) or remove terminal blocks from pin header (existing installation).
To wire the thermostat: 1. Connect the wires to the terminal block(s) by: a. Removing approximately 1/4 inch (6 mm) of insulation from the wires.
b. Using the terminal block screws to securely fasten each wire into the terminal block.Note: Refer
 toTable 3, p.13and the wiring diagrams on page 14-through 18to
determine the correct terminal for each wire.
In some cases the terminal labels (such as Y, G, or R) correctly correspond to the
first
 letter of the color wire in which they are connected. However, it is important to
verify which equipment terminals are connected at the other ends of the wires
before connecting the wires to the thermostat.
2. Align the pins/label on the circuit board with the holes/label on the terminal blocks and gently push
 the wired terminal blocks into place on the circuit board (refer to Figure3).
Figure 3. Attaching the wired terminal blocks to the pins on the circuit board s
3. Push the excess wire through the hole in the wall cavity or into the junction box. Important: Do
 not coil excess wire between the thermostat and the backplate. Use non-
flammable insulation to prevent air movement between the wall cavity and the
thermostat.
( W 1)W 2Y2S1S2H pHsDh
A
CG
(O
/B )W
R
c
RY
C    G       
Y     W     Rc     R
W2  Y2   A     S1   S2     Hp    Hs   Dh 
						

							BAS-SVX44A-EN13
Installation and Wiring
Terminal Identification
Table 3identifies the programmable thermostat terminals.
Wiring Diagrams
The following diagrams show typical wiring scenarios for the touch-screen programmable
thermostat.
UseTable 4and the corresponding figure to correctly wire the thermostat. Table 3. Terminal identification
Connector 
TypeTerminal
Label(a)
(a) Label order above is how they appear on the thermostat terminal block.
Terminal Description
8-pin Connectors
Dh Dehumidify relay
Hs External humidity sensor input
Hp External humidity sensor power
S2 External temperature sensor
S1 External temperature sensor
A Economizer relay
Y2 Stage 2 compressor control relay
(W1)W2 (Aux or Em heat relay)
(b) Second stage heat relay
(b) Text in parentheses applies to only heat pump systems.
6-pin connectors
R24 Vac heating 
Important:Terminal shipped with jumper connected. Remove jumper if the 24 Vac
power supplies are separate.
Rc24 Vac cooling
Important:Terminal shipped with jumper connected. Remove jumper if the 24 Vac
power supplies are separate.
(O/B)W (Changeover valve)
(b) Heat relay
Y Stage 1 compressor control relay
G Fan relay
C Common
Table 4. System type options for programmable thermostats
System TypeValue for Option 130See Diagram
1-heat/1-cool, conventional 1Figure
 4
1-heat/1-cool, heat pump without auxiliary heat 2Figure
 5
1-heat only, conventional without fan 3Figure
 6
1-heat only, conventional with fan 4Figure
 7
1-cool, conventional 5Figure
 8
2-heat/1-cool, heat pump with auxiliary heat 6Figure
 9
2-heat/2-cool, conventional 7Figure
 10
2-heat/1-cool, conventional 8Figure
 11
1-heat/2-cool, conventional 9Figure
 12
2-heat/2-cool, heat pump without auxiliary heat 10Figure
 13
3-heat/2-cool, heat pump with auxiliary heat 11Figure
 14 
						

							14BAS-SVX44A-EN
Installation and Wiring
Figure 4. Programmable Thermostat, 1H/1C, Conventional (Option 1)
Figure 5. Programmable Thermostat, 1H/1C, Heat Pump Without Auxiliary Heat (Option 2)
Fa n24 VacC
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Heat
Economizer/TOD
Dehumidification
Remote Humidity Sensor
Remote Temperature Sensor
Compressor L2
L1 (hot)
Single Transformer:
(jumper
installed)
Fa n L2
L1 (hot)
24 Vac
Heat
Compressor
L2
L1 (hot)
24 Vac
Cooling Transformer Heating Transformer Two Transformers:
(jumper
removed)
Economizer/TOD Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Fa n 24 Vac
Changeover Valve
Compressor L2
L1 (hot)
(jumper
installed)
Economizer/TOD
Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
W1
Y2 A
S1 S2
Hp Hs
Dh
C
G Y
O/B
Rc
R 
						

							BAS-SVX44A-EN15
Installation and Wiring
Figure 6. Programmable Thermostat, 1H Only, Conventional Without Fan (Option 3)
Figure 7. Programmable Thermostat, 1H, Conventional With Fan (Option 4)
Figure 8. Programmable Thermostat, 1C, Conventional (Option 5)
24 Vac
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Heat
Economizer/TOD
Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
L2
L1 (hot)
(jumper
installed)
Fa n 24 Vac
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Heat
Economizer/TOD
Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
L2
L1 (hot)
(jumper
installed)
Fa n 24 Vac
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Economizer/TOD Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
Compressor L2
L1 (hot)
(jumper
installed) 
						

							16BAS-SVX44A-EN
Installation and Wiring
Figure 9. Programmable Thermostat, 2H/1C, Heat Pump With Auxiliary Heat (Option6)
Figure 10. Programmable Thermostat, 2H/2C, Conventional (Option7)
Fa n24 Vac
Changeover Valve
Compressor
Auxiliary Heat
L2
L1 (hot)
(jumper
installed)
Economizer/TOD
Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
W1
Y2 A
S1 S2
Hp Hs
Dh
C
G Y
O/B
Rc
R
Fa n
Heat 1 Heat 2
24 Vac
C
G Y
W
Rc
R
W2Y2 A
S1
S2
Hp Hs
Dh
Economizer/TOD Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
Compressor 1 Compressor 2 L2
L1 (hot)
Single Transformer:
(jumper
installed)
Fa n L2
L1 (hot)
24 Vac
Heat 1
Compressor 1
L2
L1 (hot)
24 Vac
Cooling Transformer Heating Transformer Two Transformers:
(jumper
removed)
Compressor 2 Economizer/TODDehumidification
Remote Temperature Sensor Remote Humidity SensorHeat 2
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh 
						

							BAS-SVX44A-EN17
Installation and Wiring
Figure 11. Programmable Thermostat, 2H/1C, Conventional (Option8)
Figure 12. Programmable Thermostat, 1H/2C, Conventional (Option9)
Fa n
Heat 1 Heat 2
24 Vac
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Economizer/TOD Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
Compressor L2
L1 (hot)
Single Transformer:
(jumper
installed)
Fa n L2
L1 (hot)
24 Vac
Heat 1
Compressor
L2
L1 (hot)
24 Vac
Cooling Transformer Heating Transformer Two Transformers:
(jumper
removed)
Economizer/TOD Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
Heat 2
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Fa n
Heat 1
24 Vac
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh
Economizer/TOD Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
Compressor 1 Compressor 2 L2
L1 (hot)
Single Transformer:
(jumper
installed)
Fa n L2
L1 (hot)
24 Vac
Heat
Compressor 1
L2
L1 (hot)
24 Vac
Cooling Transformer Heating Transformer Two Transformers:
(jumper
removed)
Compressor 2 Economizer/TODDehumidification
Remote Temperature Sensor Remote Humidity Sensor
C
G Y
W
Rc
R
W2Y2 A
S1 S2
Hp Hs
Dh 
						

							18BAS-SVX44A-EN
Installation and Wiring
Figure 13. Programmable Thermostat, 2H/2C, Heat Pump Without Auxiliary Heat (Option10)
Figure 14. Programmable Thermostat, 3H/2C, Heat Pump With Auxiliary Heat (Option 11)
Thermostat Cover Replacement
After completing all wiring, replace the thermostat cover. To replace the cover:
1. Hook the cover over the top of the backplate. Apply light pressure to the bottom of the cover until
 it snaps into place.
2. To help deter tampering, install the security screw into the bottom of the cover as shown below.
Figure 15. Close cover and replace security screw
Fa n 24 Vac
Changeover Valve
Compressor 1 Compressor 2
L2
L1 (hot)
(jumper
installed)
Economizer/TOD
Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
W1
Y2 A
S1 S2
Hp Hs
Dh
C
G Y
O/B
Rc
R
Fa n 24 Vac
Changeover Valve
Compressor 1 Auxiliary Heat
Compressor 2
L2
L1 (hot)
(jumper
installed)
Economizer/TOD
Dehumidification
Remote Temperature Sensor Remote Humidity Sensor
W1
Y2 A
S1 S2
Hp Hs
Dh
C
G Y
O/B
Rc
R
Install security screw 
to deter tampering. 
						

							BAS-SVX44A-EN19
Power, System Tests, and Software Reset
This section provides information about:
 Applying power
 Power-up test
 System tests
Applying Power
Restore power to the HVAC equipment. The thermostat initiates a power-up test and will display
an error, if one is detected (refer to the sections, “Power-up Test,” p. 19and“Error Codes,” p. 48 ).
If no errors are detected, the home screen appears as shown in Figure 16.
Figure 16. Home screens
Power-up Test
The power-up test is performed any time power is applied to the thermostat. At the start of the power-up test, the thermostat screen will display the following sequence of events, in order:
 All icons for approximately 1.5 seconds and then;
 The firmware version for 1.5 seconds ( in
 the clock digit location), and finally;
 Self-testing.
If an error is detected, the error code will display whereby, the user can bypass the error by pressing
the Cancel icon

( ). Once the self-testing has completed checking for any errors, the thermostat
will display the Homescreen.
During the test, the configuration/test icon ( ) blinks on the LCD screen indicating a test is in
progress. Table 5lists the sequence of tests that occurs:
Note: For
 a detailed list and descriptions of error codes, refer to the section, “Error Codes,” p.48.
Example of Home Screen: Heat Only
Example of Home Screen: Auto Heat/Cool 
						

							20BAS-SVX44A-EN
Power, System Tests, and Software Reset
System Tests
The system test mode is used to run diagnostics on the thermostat to verify that the unit is
functioning properly.
Referring to Table 6, p. 22, to run a system test:
1. Remove the thermostat cover as shown in the section, “Mounting the Backplate,” p.10.
2. Press and hold the Configurationbutton
 (refer toFigure17, p.21) for 3 seconds. The
configuration/test icon ( ) displays and the thermostat is now in Configuration
 Setup
Mode .
3. Press and hold the Configurationbutton
 for 3 seconds again to activateSystem Test Mode
indicated by the blinking parameter/test icon. When activating system test mode, the first
system test number displayed is always 01.
The test number is changed with the Up ( ) or Down () arrows in the center of the display
screen.
Note: TheOKbutton
 () functions the same as the Up arrow and steps to the next
higher test number.
The test value is changed with the Up ( ) or Down () arrows on the right-hand side of
the display screen.
Note: Changing
 a test value will start/stop the test as described in Table6. Refer to
Figure 17for arrow locations and Table6, p.22for a list of test values and test
value descriptions.
4. Exit the System
 Test Modeand return to the Homescreen by:
a. Pressing the Configuration button
 momentarily (less than 3 seconds).
b. Touching and holding for 2 seconds.
c. Powering down the thermostat and then powering it up again.
d. Waiting for a 10-minute time out after the last touch.
Table 5. Error code test sequence
Test 
SequenceError Code and Description
1 E4;
• Operating range is 18 to 32 Vrms.
• Low error detection is less than 16.6, ±8.5%.
• High error detection is greater than 34, ±8.5%
2 E7; • Memory error (write and read 0x55 and 0xAA failed).
3 E3;
• Permanent data error. Access error or checksum error is detected.
4 E0;
• Temperature sensor error. Checks internal and/or external temperature sensor depending on  setting of configuration option 0210.
5 E1;
• Humidity sensor error. Checks internal or external humidity sensor depen\
ding on setting of 
configuration option 0200.
6 E5;
• Real Time Clock (RTC) Error.