Johnson Controls S1-THXU280 Manual de usuario

Letter: ST-002-2017

Date: April 6, 2017

To: All Unitary Products Branch Service, Sales, and Training Managers

All Unitary Products Distribution Service, Sales, and Training Managers

Subject: S1-THXU280 (B, W) Thermostat software update for

Variable Capacity air conditioner or heat pump

Product: S1-THXU280, S1-THXU280B, S1-THXU280W HxTM Touch-screen

Thermostat

This is an update to service tips letter ST-012-16 released on October 31, 2016.

The S1-THXU280 HxTM Touch-screen Thermostat released in May of 2016 previously

required a software update to work with communicating equipment. The software update

had to be manually pushed to the thermostat by the technical services group.

With the introduction of the Variable Capacity air conditioner and heat pump models the

thermostats must have a software update to control these new models. The update will

be done automatically if the thermostat has a WiFi internet connection.

To use this thermostat in communicating mode install it at the customers location and

wire the thermostat using A+, R, C, B- connections from the thermostat to communicating

equipment. If using this thermostat with communicating equipment other than the new

Variable Capacity air conditioner or heat pump, you must set all indoor and outdoor

equipment jumpers. If using the thermostat with Variable Capacity outdoor equipment,

the outdoor equipment will control airflow during heat pump heating or cooling. You must

set the HEAT jumper on the indoor equipment regardless if you are using a TM*V gas

furnace or an air handler with field installed electric heat. Once all equipment jumpers

are properly set, apply power to the system and perform thermostat setup. The S1-

THXU280 thermostat does not contain communicating software therefore it will not

recognize the indoor equipment automatically. Set the thermostat up for conventional

equipment operation even though it is not wired for conventional control. The next step

will require connecting the thermostat to the WiFi internet connection at the installed

location. Instructions on connecting the thermostat to WiFi are located in the

homeowner’s quick reference guide shipped with each thermostat. If the thermostat is

connected to the internet the WiFi status indicator will be green in color. See the image

below for an example.

Unitary Products

Technical Services

Service Tips Letter

Once the thermostat is connected to the internet through WiFi and after a 5 minute period,

it will automatically download the most up to date communicating software available. See

the image below of a thermostat software update.

This software update should take approximately 1 minute. Once the software update is

completely installed, restore factory defaults. To restore the thermostat factory defaults

enter the installer service menu by pressing the gear icon on the home screen then press

and hold the service van icon as shown below.

Once service mode is entered scroll down to the bottom of listed setup options and

choose “restore defaults” as shown below.

Once “restore defaults” is selected, you will enter the “restore defaults” screen. This

screen is shown on the following page. Press and hold the 5 icon as shown below for 5

seconds and defaults will be restored.

After factory defaults have been restored, the thermostat will find the previously wired

communicating equipment and it will enter the auto setup mode.

This latest software update applies to all HxTM Touch-screen Thermostat models that

have already been shipped from Source #1 and may be in your inventory. The S1-

THXU280 model does not contain ANY software for communicating equipment and must

be updated to use it as a communicating thermostat.

The S1-THXU280B and S1-THXU280W already contain a version of software that will

allow them to communicate with communicating capable equipment with the exception of

the Variable Capacity air conditioner or heat pump. ALL three thermostats WILL require

a software update if applied with the Variable Capacity air conditioner or heat pump.

The HxTM Touch-screen Thermostat is NOT compatible if using our communicating

zoning panel with communicating equipment. For communicating zoning applications

continue to use the S1-TTSCC0* thermostat models with 3.06z firmware. The Variable

Capacity air conditioner or heat pump is NOT compatible in a zoning application at this

time and will NOT communicate with the communicating zone panel.

All Source #1 inventory of HxTM Touch-screen Thermostats shipped on or after April 3rd,

2016 contain communicating software that will operate with ALL communicating capable

equipment including the Variable Capacity air conditioner and heat pump.

If you have any questions on this feel free to call Unitary Products Group Technical

Services at 1-877-UPG-SERV and speak with a technical support representative.

Casey McConnaughy

Field Service Supervisor

UPG Technical Services

Johnson Controls Unitary Products

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