Trane WTS Installation and operating instructions

Wireless Zone Sensors
Models WTS, WZS, AND WDS
Installation, Operation, and Maintenance
April 2020 BAS-SVX04G-EN
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are
attached to the equipment.

©2020 Trane BAS-SVX04G-EN
Introduction
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required. Your personal safety and the proper
operation of this machine depend upon the strict observance of these precautions.
The three types of advisories are defined as follows:
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTIONsIndicates a potentially hazardous situation which, if not avoided, could result in
minor or moderate injury. It could also be used to alert against unsafe practices.
NOTICE Indicates a situation that could result in equipment or property-damage only
accidents.
Important Environmental Concerns
Scientific research has shown that certain man-made chemicals can affect the earth’s naturally
occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the
identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine
and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all
refrigerants containing these compounds have the same potential impact to the environment.
Trane advocates the responsible handling of all refrigerants-including industry replacements for
CFCs and HCFCs such as saturated or unsaturated HFCs and HCFCs.
Important Responsible Refrigerant Practices
Trane believes that responsible refrigerant practices are important to the environment, our
customers, and the air conditioning industry. All technicians who handle refrigerants must be
certified according to local rules. For the USA, the Federal Clean Air Act (Section 608) sets forth the
requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the
equipment that is used in these service procedures. In addition, some states or municipalities may
have additional requirements that must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
WARNING
Proper Field Wiring and Grounding Required!
Failure to follow code could result in death or serious injury. All field wiring MUST be
performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE
and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field
wiring installation and grounding as described in NEC and your local/state electrical codes.
Failure to follow code could result in death or serious injury.

WARNING
Personal Protective Equipment (PPE) Required!
Failure to wear proper PPE for the job being undertaken could result in death or serious injury.
Technicians, in order to protect themselves from potential electrical, mechanical, and chemical
hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well
as the instructions below:
• Before installing/servicing this unit, technicians MUST put on all PPE required for the work
being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard
hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to
appropriate Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals, ALWAYS refer to the appropriate SDS
and OSHA/GHS (Global Harmonized System of Classification and Labeling of Chemicals)
guidelines for information on allowable personal exposure levels, proper respiratory
protection and handling instructions.
• If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE
in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash
protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING,
DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC
FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.
WARNING
Follow EHS Policies!
Failure to follow instructions below could result in death or serious injury.
• All Trane personnel must follow the company’s Environmental, Health and Safety (EHS)
policies when performing work such as hot work, electrical, fall protection, lockout/tagout,
refrigerant handling, etc. Where local regulations are more stringent than these policies,
those regulations supersede these policies.
• Non-Trane personnel should always follow local regulations.
Introduction
BAS-SVX04G-EN 3
Copyright
This document and the information in it are the property of Trane, and may not be used or
reproduced in whole or in part without written permission. Trane reserves the right to revise this
publication at any time, and to make changes to its content without obligation to notify any person
of such revision or change.
Trademarks
All trademarks referenced in this document are the trademarks of their respective owners.
Revision History
•Revised instructions on how to change the fan speed control.

Table of Contents
4BAS-SVX04G-EN
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Height Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Address Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting the Receiver Back Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wiring the Receiver to the Unit Controller . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Replacing the Receiver Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Applying Power to the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Observing the Receiver for Readiness to Associate . . . . . . . . . . . . . . . . . . . 17
Associating the Sensor to the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Testing Signal Strength and Battery Status . . . . . . . . . . . . . . . . . . . . . . . . . 19
Mounting the Sensor Back Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Configuring the Wireless Sensor (Model WDS only) . . . . . . . . . . . . . . . . . . 21
Configuration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Replacing the Sensor Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Temporary Occupancy (Timed Override) . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Model WZS Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Model WDS Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Service Pin Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Model WZS Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Model WDS Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Star(*)/Double Star(**) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
End-of-Range Temperature Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Receiver Power-up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Sensor Transmission Time and Temperature Variables . . . . . . . . . . . . . . . 31
Operating Mode (Model WDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table of Contents
BAS-SVX04G-EN 5
Changing Temperature Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Changing Heating and Cooling Room Temperature Settings (dual setpoint
systems only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Changing System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Changing Fan Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Requesting Temporary Occupancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Lock Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Testing Signal Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Testing Battery Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Maintenance and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Locations of LEDs, Test button, Test Symbols, and Error Codes . . . . . . . . 34
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Testing Signal Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Testing Battery Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
24 V Power Status Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Using the Wireless Sensor System to Check Signal Strength on a Site . . 37
Replacing Sensor Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Battery Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Manual Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Disassociation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Sensor/Receiver Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Replacing a Failed Sensor or Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Servicing and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Servicing and Testing Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Procedure for Testing the Wireless Sensor System . . . . . . . . . . . . . . . . . 40
Procedure for Testing the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Forcing a Sensor to Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Output Power Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Output Values—Failure and Default Modes of Operation . . . . . . . . . . . . . . 42
Measuring Output Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Cleaning the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Appendix A: Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Single Transformer Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Multiple Transformer Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Appendix B: Agency Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6BAS-SVX04G-EN
General Information
This section provides a description of the sensors, as well as part numbers and dimensions.
Product Description
Trane®wireless sensor sets are compatible with any Trane unit controller that uses a standard 10
ktemperature input. The sets include sensor, receiver, wiring harness, and two AA lithium
batteries. No further software or hardware is necessary for site evaluation, installation, or
maintenance. Zone temperature is standard on all models.
Notes:
•The information in this manual applies to both factory and field installed versions of
the Trane wireless sensor sets.
•A service tool cannot be connected to a Trane wireless sensor.
Trane wireless sensors include the following models:
Model WDS
This configurable sensor has an LCD display. It provides the same functions as many currently
available Trane wired sensors. Configurable features include:
• Temperature units: Fahrenheit (ºF) or Celsius (ºC)
• Temperature resolution: 1.0, 0.5, or 0.1 degrees
• Ability to display setpoint only (zone temperature does not display)
• Single, dual, or no setpoint
• System settings: auto, off, cool, heat, emergency heat
• Dead band (heat/cool setpoint offset for dual setpoint systems)
• Fan settings: high, medium, low, auto, off
• Timed override request function
• Lockable settings to protect against unauthorized use
• Service pin request
Model WTS
This sensor measures and transmits the zone temperature only.
Model WZS
This sensor set transmits the zone temperature, all zone temperature setpoint functions, temporary
occupancy (timed override), and unoccupied (cancel) information to the receiver. The receiver
electrically reproduces the zone temperature resistance, all zone temperature setpoint function
resistances, and temporary occupancy/unoccupied information as sent by the sensor.

BAS-SVX04G-EN 7
General Information
Part Numbers
The following table lists available models by part number:
Part number Description
X1379082101 Model WTS sensor only
X1379082201 Model WDS sensor only
X1379082301 Model WTS sensor set
X1379082401 Model WDS sensor set
X13790492 Model WZS, sensor only, Fahrenheit
X13790494 Model WZS, sensor only, Celsius
X13790496 Model WZS sensor set, Fahrenheit
X13790498 Model WZS sensor set, Celsius
X13790854 Receiver only, all models other than flush-mount
X13790490 Receiver only, for flush-mount applications
X1905211201 Wire harness, seven conductor, for wireless receiver

8BAS-SVX04G-EN
General Information
Dimensions
The following illustration provides specific dimension details. The dimensions are the same for
all models.
2.9 in (73.5 cm)
1.08 in (27.5 mm)
4.68 in (118.9 mm)
1.45 in (36.8 mm)
0.63 in (15.9 mm)
0.31 in (8 mm)
0.12 in (3 mm)
TYP R.07 in
(R1.8) mm)
3.39 in (86 mm)
2.48 in (63 mm)
2.62 in (66.5 mm)
TYP 0.24 in (6 mm)

BAS-SVX04G-EN 9
Pre-Installation
This section provides the following pre-installation information:
• Location considerations
• Height requirements
• Mounting surfaces
• Address settings
Location Considerations
Placement of the sensor and the receiver is critical to proper operation. For most installations,
barriers limit proper radio signal strength more than distance. For best radio transmission range
and reliability, mount the receiver and sensor in line of sight. Where this is not possible, try to
minimize the number of barriers between the pair of devices. In general, sheet rock walls and
ceiling tiles offer little restriction to the transmission of the radio signal throughout the building.
The transmission range for the sensor is as follows:
• Open range: 2,500 ft (762 m) (packet error rate = 2%)
• Usable range: 200 ft (61 m)
• Typical range: 75 ft (23 m)
Receiver
When selecting a receiver location, avoid the following:
• Locations that are outside the operating temperature and humidity range (refer to
“Specifications,” p. 45)
• Metal barriers between the receiver and the sensor (for example, plastered walls with metal
lathe or metal roof decks)
• Thick, solid concrete walls between the receiver and the sensor
• Placing the receiver inside metal enclosures
• Mounting on rooftop without a careful site evaluation and confirmation
Sensor
When selecting a sensor location, avoid the following:
• Areas of direct sunlight
• Areas in the direct air stream of air diffusers
• Exterior walls and other walls that have a temperature differential between the two sides
• Areas that are close to heat sources such as sunlight, appliances, concealed pipes, chimneys,
or other heat-generating equipment
• Drafty areas
• Dead spots behind doors, projection screens, or corners
• Walls that are subjectto high vibration
• Areas with high humidity
• High traffic areas (to reduce accidental damage or tampering)
• Metal barriers between the receiver and the sensor (for example, plastered walls with metal
lathe or metal roof decks)
• Thick, solid concrete walls between the receiver and the sensor
• Placing the sensor inside metal enclosures

10 BAS-SVX04G-EN
Pre-Installation
Height Requirements
The recommended maximum mounting height is 54 inches from the bottom of the back plate to
the floor. If a parallel approach by a person in a wheelchair is required, reduce the maximum height
to 48 inches.
Note: Consult section 4.27.3 of the 2002 ADA (Americans with Disability Act) guideline, and local
building codes, for further details regarding wheelchair requirements.
Mounting Surfaces
Using the hardware provided, mount the back plate of the receiver and the sensor to a flat surface
such as sheet rock or plaster, or an electrical junction box. The sensor must be mounted plumb for
accurate temperature control and to ensure proper air movement through the sensor.
• Receivers: Use the included hardware.
•Sensors:
–If mounting onto sheet rock or plaster, use the plastic threaded anchors (pre-
drilling holes is not usually necessary) and the two M3.5 x 20 mm mounting
screws.
–For mounting onto an electrical junction box, use the two 6-32 x 3/4 in. screws.
Address Setting
The process of establishing communication between a receiver and sensor is referred to as
association. The following limitations apply:
• Each associated receiver/sensor set that communicates within the reception range of the
wireless system must have a unique address.
• It is not possible to associate more than one sensor to a receiver, nor is it possible to associate
more than one receiver to a sensor.
To associate a receiver and sensor, the two devices must have their rotary address switches set to
the same address.
Important: Set the addresses before applying power to the receiver and before removing the
insulation strip (Figure 1, p. 11) from the sensor.

BAS-SVX04G-EN 11
Pre-Installation
To set the receiver and sensor addresses:
1. Using a small screwdriver, set the three rotary address switches (locations S1, S2, S3)
on the receiver to an address between 001 and 999 (see Figure 1). (You do not have
to remove the covers to access the rotary address switches.)
Note: Do not use 000 as an address. An address of 000 returns the receiver outputs to their
factory defaults (zone temperature and setpoint outputs: 72.5°F [22.5°C]), removes all
association knowledge, and prevents association with a sensor.
Figure 1. Setting the rotary address switches on the receiver and the sensor
2. Set the three rotary address switches (locations S1, S2, S3) on the sensor to the same address
as the receiver (see Figure 1).
Note: Do not use 000 as an address. An address of 000 removes all association knowledge,
reverts the sensor to a low-power hibernation mode, and sends a disassociation request
to the receiver.
3. Record the address and location of the receiver and sensor pair.
S5
GND
R77
C35
S1 S2
C33
LED4
S4
S5
S3
LED1
LED2
LED3
LED5
C34
J1
COMM -
24VAC/DC
SETPOINT
HEATING SET
SIGNAL
POWER
ADDDRESS
FAN/SYSTEM
ZONE
COMM +
INSTALL
WIRELESS
GND
!B1 +
INSTALL
WIRELESS
S4
S3
S2
S1
ADDRESS
STATUS
BATTERY
LED5
SIGNAL
LED3
LED2
LED1
Pb
Pb-FREE
STATUS
LED4
L
T
A
L
L
L
E
S
S
L
T
A
A
L
E
Do not remove the
insulation strip yet.

12 BAS-SVX04G-EN
Installation
This section provides step-by-step installation instructions. Read through the pre-installation
information before proceeding with installation.
Important: It is recommended that you install the sensor set in the order presented in this
section.
Mounting the Receiver Back Plate
To mount the receiver back plate:
1. Remove the cover by firmly pressing the thumb tab at the bottom of the cover and pulling the
cover away from the back plate.
Note: If present, remove the security screw before removing the cover.
2. Hold the back plate against the mounting surface and mark the screw locations.
Note: Locate the receiver to ensure that the LEDs are easy to view.
3. Secure the back plate of the mounting surface using the included hardware.
LEDs
Security screw

BAS-SVX04G-EN 13
Installation
Wiring the Receiver to the Unit Controller
Power requirements and wiring instructions for the receiver are described in this section.
Power Requirements
The required power for the receiver is 24 Vac or 24 Vdc and less than 1 VA. The receiver is designed
to be powered by the host unit controller. A dedicated transformer to power the receiver is seldom
necessary and is not recommended. It should be used only when the host transformer does not
have enough volt-ampere (VA) capacity to power the receiver (see “Specifications,” p. 45 for
receiver power consumption).
Wiring diagrams for single transformer wiring and multiple transformer wiring are located in
“Appendix A: Wiring Diagrams,” p. 46.
Wiring Procedure
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could result in death or
serious injury. Disconnect all electric power, including remote disconnects
before servicing. Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
NOTICE:
Equipment Damage!
Applying excessive voltage to the receiver module will permanently
damage it.
To wire the receiver to the unit controller:
1. Shut off power to the unit controller to which you are wiring the receiver.
2. Connect the wiring harness (provided) to the receiver (Figure 2, p. 14).
3. Route the wires from the receiver to the unit controller through either:
a. The opening at the back of the back plate (see Figure 3, p. 15 for an example).
b. The hole in the bottom of the cover (see Figure 4, p. 15 for an example).
4. Terminate wires at the unit controller. Refer to Table 1, p. 14 and Figure 2, p. 14 to determine
which wires to use and where to terminate them on the controller.
Notes:
• To maintain agency compliance, ensure that length of the wiring harness is no more
than 3 m.
• Adapters are provided, which allow connecting multiple wires to the power terminals
of the host unit controller (see Figure 3 and Figure 4, p. 15.
• An anti-short bushing is provided; use it to prevent the wire from shorting out if the steel
penetrates the wiring harness (see Figure 4, p. 15).
• If spade connectors are not needed, remove them and strip 1/4 inch of insulation from
wire.
5. Trim off any unused terminals. Insulate exposed wire with tape or a wire nut.

Figure 2. Wiring harness
14 BAS-SVX04G-EN
Installation
Table 1. Wiring harness: Wire identification
Wire label Color Function
HEATING SET Brown Space temperature heating setpoint
(WDS only)
FAN SYSTEM Green Fan and system control (WDS only)
SETPOINT Red Space temperature setpoint 
(WDS and WZS only)
ZONE White Zone temperature
GND-SIGNAL Black Ground for setpoint and zone signal
24VAC/DC Blue 24 Vac/Vdc power
GND-POWER Yellow Ground for 24 Vac/dc
Connect wiring
harness to
receiver

Figure 3. Wiring a receiver to a unit controller through the opening in the back of the receiver back plate
Figure 4. Wiring a receiver to a unit controller through the bottom slot in receiver cover
BAS-SVX04G-EN 15
Installation

16 BAS-SVX04G-EN
Installation
Replacing the Receiver Cover
To replace the cover:
1. Hook the cover over the top of the back plate. Apply light pressure to the bottom of the cover
until it snaps in place.
2. Install the security screw into the bottom of the cover.
Applying Power to the Receiver
Restore power to the UCM. Observe LED5 on the receiver; it will light and stay constantly On when
24 V power is normal.
Security screw
LED5 stays constantly On after
applying power to the receiver

BAS-SVX04G-EN 17
Installation
Observing the Receiver for Readiness to Associate
After initial power up, the receiver conducts a channel scan for 20 seconds. During this time, the
receiver selects from 16 available channels the clearest channel on which to operate. LED1, LED2,
and LED3 flash rapidly in succession (round-robin style) while the channel scan is in progress, as
shown in part 1 of the illustration.
Important: Do not attempt association (leave the insulation strip in place) until the channel scan
is finished.
After the channel scan is finished, LED3 begins blinking (one-blink pattern) to show that the receiver
is ready to be associated with a sensor. See part 2 of the illustration.
2
1
LED3
0
20
Sec.

18 BAS-SVX04G-EN
Installation
Associating the Sensor to the Receiver
To associate the sensor to the receiver:
1. Remove the sensor cover by firmly pressing the thumb tab at the bottom of the cover
and pulling the cover away from the back plate.
2. Verify that the sensor is set to the same address as the receiver it is to be associated with.
3. Power the sensor by removing the insulation strip from between the two batteries.
Association is automatically initiated between the sensor and the receiver. When LED3 on the
receiver stops blinking, association has been established.
The receiver will retain its address information through a power loss. Address information is lost
only if the receiver is manually disassociated or if its rotary switch setting is changed after it has
been associated.
If the first association attempt is unsuccessful, the sensor automatically re-attempts association
with the receiver every 10 minutes.
An associated sensor that has lost communication with the receiver will transmit an association
request every 50 minutes. You can manually initiate association (see “Manual Association,” p. 39”).

BAS-SVX04G-EN 19
Installation
Testing Signal Strength and Battery Status
To verify that the association process was successful and that the batteries have adequate charge:
1. Firmly press and release the Test button on the bottom of the sensor (as illustrated below).
2. For models WTS and WZS, view LED1, LED2, and LED3 to determine the signal strength. View
LED5 to determine the battery status. (See the illustration for model WTS and WZS sensors.)
Note: The LEDs will turn Off after 5 seconds to conserve battery strength.
For model WDS, determine the signal strength and battery status by viewing the symbols on
the sensor display. (See the illustration for model WDS sensors.)
3. Record the results in your commissioning statement.
Note: For more information, see “Testing Signal Strength,” p. 35 and “Testing Battery Status,”
p. 36.
LED1
LED2
LED3
LED5
Model WTS and WZS sensors Model WDS sensors
Test butt o n
Push firmly,
then release
Push firmly,
then release
Test butt o n

20 BAS-SVX04G-EN
Installation
Mounting the Sensor Back Plate
To mount the sensor back plate:
1. Hold the back plate against the mounting surface and mark the screw locations.
2. Secure the back plate against the mounting surface using included hardware.
The figure shows an example of mounting the back plate of the sensor into sheetrock or plaster.