Trane XL850 Installation Manual

Trane XL850 Installation Manual - Take control of your home’s heating, cooling and energy usage with the state-of-the-art ComfortLink™ XL850 Control. Designed especially for use with ComfortLink™ enabled and variable speed systems, this control comes equipped with a built-in Nexia™ Home Intelligence Bridge, you can remotely control and schedule the thermostat—and up to 200 additional Z-Wave products throughout your home—from any Internet-enabled smartphone, tablet or computer.

Trane XL850 Smart Control Installation User Manual

The XL850 is an easy-to-use, programmable control with a color touch-screen. When connected with Nexia™ smart home, you can control your home’s heating and cooling system and up to 230 separate Z-Wave devices from a smart phone, PC or tablet from virtually anywhere. This guide will help you configure and connect your XL850 Smart Control quickly and easily.

Specification ComfortLink Trane XL850

Product Model TCONT850AC52UAA
Product 850 Wi-Fi Connected Communicating Comfort Control
Size  5-1/2” x 3-3/8” x 1” (WxHxD)
Configuration Heat Pump, Heat/Cool, Dual Fuel, Heat Only, Cooling Only
Maximum Number of Stages 5 Stages Heat, 2 Stages Cooling
Storage/Operating Temperature -40ºF to 175ºF, 5% to 95% RH non-condensing
Input Power 24VAC
Power Consumption    7VA*
Wire Usage 18 AWG
Communications ComfortLink II 3-Wire Connection
System Modes Auto, Heating, Cooling, Off, Emergency Heat
Fan Modes Auto, On, Circulate
Cooling Setpoint Temperature Range  60ºF to 99ºF, 1ºF resolution
Heating Setpoint Temperature Range  55ºF to 90ºF, 1ºF resolution
Indoor Temperature Display Range -40ºF to 122ºF
Outdoor Temperature Display Range  -40ºF to 140ºF
Indoor Humidity Display Range  0% to 100%, 1% resolution
Minimum Cycle Off Time Delay Compressor: 5 minutes, Indoor Heat: 1 minute

Trane XL850 Smart Control Overview

The 850 Programmable Wi-Fi Control has a 4.3” color touch screen and offers a full-featured and easy-to-use interface. From individual daily schedules to remote access, the 850 is one of the most advanced Communicating Controls available.

Trane XL850 Smart Control Contents

  • 1-Control
  • 1-Sub-base
  • 2-#6 18X1 Phillips slotted head mounting screws
  • 2-#6x1 Nylon Drywall Anchors
  • 1-Installation Guide
  • 1-Quick Start Guide
  • RJ-45 Holder and Screw
  • 1-USB “On-the Go” Adapter Cable (Micro USB plug to Standard USB receptacle)

Trane XL850 Smart Control Accessories

  • Wired Remote Indoor Sensor (ZZSENSAL0400AA)
  • Wired Remote Outdoor Sensor (BAYSEN01ATEMPA)
  • Relay Panel for 24v applications (BAY24VRPAC52D)

Trane XL850 Smart Control Installation


The 850 is designed for installation in climate controlled living spaces. Place the unit in a central location with good circulation. For proper temperature sensing, avoid exposing the 850 to radiant heat source. Avoid locations close to windows, behind doors or alcoves with poor air circulation, adjoining outside walls, or doors that lead to the outside. Select a location that prevents the 850 from being directly exposed to air currents from supply registers or ceiling fans. Mount the Control on a section of interior wall that does not contain hot or cold water pipes or duct work.

Important: The 850 Control utilizes a 4.3” color touch screen. This screen generates heat which is vented out the top of the Control utilizing natural convection. If an air source is directed at or from above, heat from the screen can be trapped within the Control and can cause the indoor temperature to be biased. (Refer to Figure 1 on page 4.)

Trane XL850 Smart Control Installation

Trane XL850 Smart Control Network Connections

To take advantage of the full range of features on the 850 Control, it should be connected to the Internet. This is possible using either a wireless or a wired connection.

Wireless Connections

If the 850 Control will be connected to the Internet using the built-in wireless feature, choose a mounting location that ensures adequate signal strength from the Internet router. Tips to Help Maximize Signal Strength:

  • Do not mount the Control more than 30 feet from the wireless router
  • There should be no more than three interior walls between the Control and the
  • Do not mount the Control in areas where electromagnetic emissions from other devices, appliances or wiring can interfere with the Control’s (i.e. wireless phones, security systems, wireless Internet cameras).
  • Do not mount the Control in recessed areas, near metal objects, or near structures. (i.e. doors, appliances, entertainment centers or shelving units).
  • Do not mount the Control closer than 2 inches to any pipes, duct work, or other metal obstructions.
  • Do not have metal obstructions, concrete or brick walls between the Control and the

Refer to the 850 User Guide for additional information on connecting the 850 to the Internet.

Wired Connections

The 850 Control may be connected to the Internet using its built-in RJ-45 connector. When using a wired connection, verify that a CAT 5 or better Ethernet cable with a male RJ-45 connector is present from the router to the Control.

Trane XL850 Smart Control Mounting

Follow these steps to mount the 850 Control to the wall.

  1. Turn OFF all power to heating and cooling
  2. If an existing thermostat is being replaced:
    • Remove the existing thermostat from the
    • Record color and terminal marking of each
    • Disconnect the wires from the existing thermostat being careful not to allow them to fall back into the wall.
  3. Carefully pry the Sub-base away from the 850 Control securely to the Sub-base when mounted on the wall.
  4. Route the wires through the opening on the Sub-base.
  5. If using a wired Internet connection, route the Ethernet cable through the opening.
  6. Place the Sub-base against the wall in the desired location and mark the wall through the mounting holes. If you are using a wired Internet connection, be sure to mark the cutout for the RJ-45 connector (see Figure 2 on page 5).
  7. Drill the holes in the wall where marked. If you are using a wireless Internet connection, skip to step 9.
  8. When using a wired Ethernet connection, follow these step and refer to Figure 3 on page 5.
    a. With the Sub-base and RJ-45 holder oriented as shown, press the holder into the Sub-base.
    b. Slide the holder to the right so it snaps in place.
    c. Secure the holder with the provided screw.
    d. Insert the RJ-45 Connector into the RJ-45 holder until it snaps into place.
  9. Mount the Sub-base to the wall using included mounting screws and drywall anchors. An optional mounting hole is available for more secure mounting, if needed. Make sure all wires extend through the hole in the Sub-base see Figure 4 on page 5.

Trane XL850 Smart Control Wiring

  1. Adjust the length and position of each wire to reach the proper terminal on the connector block of the Sub-base. Strip 1/4” of insulation from each wire. Do not allow adjacent wires to short together when connected.
  2. Match and connect control wires to the proper terminals on the connector block. Refer to Field Wiring Diagrams included in this document.
  3. Push excess wire back into the wall and seal the hole to prevent air leaks. NOTE: Air Leaks in the wall behind the Control can cause improper operation.
  4. Attach the Control to the Sub-base.
  5. Turn ON power to the heating and cooling equipment.

Trane XL850 Smart Control Wiring

Readmore and Download Trane XL850 Installation Manual

Title : ComfortLink Trane XL850 Smart Control Installation User Manual
Format : PDF
Pages : 24 Pages
Language : English
File Size : 1,5 MB

Trane XL850 Smart Control Installation User Manual

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