HERSCHEL T-MT Mains Powered WiFi Thermostat Instruction Manual

Herschel XLS Heating Controls
T-MT Mains powered Wifi thermostat
Installation and operating instructions

Technical Information

Alexa and Google Assistant when paired with the Smartlife App
Warranty:| 2 years
Certifications:| CE, RoHS, EMC, RED, LOT20

Safety

Use in accordance with the EU and national regulations. For indoor use only. Keep your device completely dry. This product must be installed by a competent person and in accordance with all the EU and national regulations.

**** Always isolate the AC mains supply before installing or working on any components that require 230V AC 50 Hz mains.
This appliance is rated IPX0 and must be installed outside of the splash zones in bathrooms.

T-MT Mains powered Wifi thermostat
Herschel T-MT is a mains-powered compact thermostat control designed to work exclusively with Herschel XLS heaters with their built-in SMART-R receiver.
T-MT also has Wifi capability to allow you to control your heating remotely via the Smartlife App or by voice control using Alexa or Google Assistant.
T-MT features a manual temperature mode, a 7×1 day program mode, and a holiday (or Away) mode. All modes will operate your Herschel heater(s) by turning them ON if the room temperature is lower than the desired temperature and will turn them OFF once the desired temperature is reached or exceeded.
The T-MT is designed to be easy to operate and incorporates the latest energy- saving features including Herschel’s open window technology and an adaptive start function ensuring your room is always at the right temperature with the least energy use.
The T-MT can be paired to more than one heater meaning multiple heaters within the room can be controlled with the same T-MT thermostat.
Please read these instructions in conjunction with the Herschel XLS panel instructions.

Installation

T-MT must be wall-mounted using mains power.
If possible, position the T-MT at least 2m away from the Herschel XLS heater.

Wall Mounting onto Back box & mains power

IMPORTANT: Ensure mains power is switched off before connecting

1. Gently open the T-MT case using a flathead screwdriver.

2. The T-MT is a Class II electrical appliance and does not require an Earth connection. Please ensure when connecting the unit to the mains, that any Earth wire is either
   removed or insulated to prevent it from accidentally touching the live or neutral terminals since this will damage the unit and invalidate your warranty. Ensure wiring clamps are fully opened (unscrew anti-clockwise) before inserting main wires. Place the Brown Live mains wire into the clamp marked “L” and the Blue Neutral wire into the clamp marked “N” and tighten both clamps securely.

3. Screw the rear casing of the T-MT onto the back box using the bolts provided. When positioning the rear of the casing on the wall, be sure to position the vents at the bottom.

4. Place the front face of the T-MT over the rear casing and snap shut.

Operating Instructions

Display & Buttons

1.  Day of week
2. Time
3. Temperature
4. Heating on symbol
5. Adaptive Start function enabled
6. Window Open function enabled
7. Operating Modes
8. Holiday (Away) Days remaining
9. Program number being run
10. Power On / Off
11. SET button
12. PRG Program button
13. Minus ‘-’ button
14. Plus ‘+’ button
15. Holiday Mode

Pairing the T-MT with the Heater

1. Double press the Pairing button on the SMART-R box of the heater. The green pairing status LED will start to flash and the heater is ready for pairing.
2. Ensure power is available to the T-MT, but that the power button on the unit is switched off. “OF” is shown on the display.
3. Long-press the SET button on the T-MT and the word “PAIR” will flash on the display.
4. When pairing has been completed successfully, the green pairing status LED on the SMART-R box will become steady green and the word “PAIR” on the T-MT will disappear.
5. You should not experience any difficulty in pairing, but in case you do, please ensure the T-MT and Heater are within range of each other and try the above process again.
6. Press the Power button on the T-MT to start using it to control the heater.

Managing your heating using your T-MT Controller
All the following steps can be performed using either the Smartlife App or the controller keypad. However, the Smartlife App makes the controller very simple and convenient to operate. We recommend using the App to program the T-MT. If you do not intend to use the App, please jump ahead to the section “Controlling the T-MT with its keypad”.

About the Smartlife App
The Smartlife App is constantly evolving and future versions may have some differences from these printed instructions which were correct at the time of printing. You can always find the most up-to-date version of the instructions by checking the T-MT a controller product page on the Herschel website, where there is a link to the most up-to-date instructions.

Downloading & Installing the Smartlife App
Scan the QR code below to download the Smartlife App from the App Store or Google Play. Alternatively, search “Smart Life” on Google Play or the App Store & look for this
icon.

https://smartapp.tuya.com/smartlife

After installing and opening the Smartlife App, you must register an account using an email address and password and accept the terms of use.

To add your T-MT controller
Turn the T-MT off using the power button. Long-press PRG until the Wifi symbol flashes.

Give your T-MT a name and access the main screen.

Operations available on the App

• From the main screen of the Smartlife app, you can access management features that are also available from the keypad of your T-MT:
• Power On / Off (turns off the T-MT and the heater)
• Temperature override (Orange circle with + and – buttons)
• Manual Operation
•  “Smart” Operation (Program Mode)
• Holiday Mode
• Settings
• Controller Keypad lock

Explanation of operating modes

Smart / PRG mode
Your Herschel Select XLS heater works most efficiently when it is set up to run against a program controlled by the T-MT thermostat. This program will always ensure your room reaches the temperature you want at the time you want it, each day of the week. This is represented by the “Smart” function on the App, and by the PRG function on the T-MT keypad. So usually you will want to set up and run the unit in Smart / PRG mode. To enable Smart mode on the T-MT, touch the “Smart” icon on the App main screen and alter the program settings in “Settings”.
Manual / MAN mode
Selecting Manual (MAN) mode allows you to set and maintain a constant temperature that does not vary with the time of day. Once you set a temperature using Manual mode, the T-MT will maintain this temperature until you give the TMT another command. Select Manual mode by touching the “Manual” icon on the App main screen and alter the temperature up or down using the + and – buttons.
Override
You can always override the Programmed or Manual set temperatures to be higher or lower by using the + or – keys on the App main screen or T-MT keypad to change the temperature. When operating on Smart / PRG mode, the T-MT will maintain the override temperature until the next programmed period (when the next programmed temperature will be set). Under Manual mode, the override temperature will remain set until you change it again manually.
Holiday Mode
There is also a Holiday (HOL) mode which allows you to save energy by setting a lower temperature while you are away. The HOL mode has a day-counter feature allowing you to set the number of days you are away and return the heating to normal operation ahead of your return.
Select Holiday mode by touching the “Holiday” icon on the App main screen. Select Days away using the slider and set your holiday temperature using the + or – buttons. We recommend ending holiday mode at least one day before your return to allow your house to warm back up again.

Other App functions

Settings

“Settings” on the App allow you to change:

• The Smart / PRG mode program schedules and temperatures;
• Temperature units (Centigrade or Fahrenheit);
• Calibration (Calibration is explained later in this manual);
• Adaptive start On or Off (Adaptive Start is explained later in this manual);
• Open Window Technology On or Off (Open Window is explained later in this manual);

Keypad Lock
The “Lock” function on the App main screen locks the keypad of the T-MT so no one can operate the controller from the device itself until the keypad lock is removed.
Device Details
You can alter other details about your T-MT including enabling Alexa or Google Assistant or sharing control of your device with other members of your family by tapping the pencil icon at the top right of the App main screen.
If you begin to use Smartlife to control other Home Automation devices, then you can also integrate your T-MT control into other home automation tasks that you set up in Smartlife from the Device Details screen.

Controlling the T-MT with its keypad
Setting Time & Calibration

1. Press the SET button on the T-MT for 5 seconds to enter the settings mode. Day 1 of the week will begin to flash on the display.

2. Use the + or – keys on the T-MT to set the day of the week. (e.g. if 1 is Monday and today is Wednesday, press + until 3 flashes in the display.)

3. Press SET again to advance to change the minutes and use the + or – keys again to adjust.

4. Press SET again to advance to change the hour and use the + or – keys to adjust (it is a 24 hour clock).
   

5. Press SET again to Calibrate the temperature of the T-MT to match another thermostat. Calibration is not usually necessary and we explain its use later. If you need to Calibrate, perform this step here.

6. The T-MT automatically saves your changes as you enter them.

7. If you use the T-MT with the Smartlife App, your controller and phone will automatically synchronize time and date settings, making this step unnecessary using the Smartlife App.

Selecting & Using Operating Modes
To select Manual (MAN) or Programming (PRG) modes, press the PRG button until the mode you require is shown at the top of the display.

Manual Mode
Select the Manual mode by clicking the PRG button until MAN is shown on the display.
Use the + or – buttons to set the temperature you want the T-MT to maintain in the room.
Note that the T-MT will maintain this temperature 24 x 7 until you switch to another mode.
Program Mode
The T-MT comes with the following program defaults which you can keep or change.
Programming the T-MT
To change the program defaults, proceed as follows.

| Mon – Fri| Sat – Sun
---|---|---
Period 1| 06:30  21°C| 08:00  21°C
Period 2| 08:00  18°C| 10:00  18°C
Period 3| 18:00  21°C| 18:00  21°C
Period 4| 22:30  16°C| 23:00  16°C

Set time & temperature for each day
Long-press PRG and the display will change to enable input of the time and temperature of the 4 periods for each day of the week, starting with the first period on day 1.
The Time will flash at the top left of the display.
Use + or – buttons to change the time. Press PRG to advance to the temperature
setting which will then flash.
Use + or – buttons to change the temperature.
Press PRG to advance to the next period.
Repeat the above steps to complete the 4 periods for each day. For 7 days of the week, this means a total of 28 programming steps.
After the final programming entry, the next click of PRG will return the unit to normal operation.
Holiday Mode
Holiday (Away) mode allows you to set a cooler fallback temperature to maintain in the house to save energy but avoid frozen water pipes. The model has a countdown timer in which you can set up to 99 days away, ensuring your normal heating settings resume ahead of your return, allowing you to come back to warm property.

To set the countdown timer, long press the Holiday (Palm Tree) button on the keypad. The “HOL” Mode is displayed and the day’s display will begin to flash. Adjust the number of days you are away using the + and – keys. Press the Holiday button again to set the temperature to be maintained while you are away. Alter the temperature using the + and – keys.

Press the Holiday button again to save and exit. The day number will count down daily until your entered number of days has elapsed and your thermostat will revert to its previous mode and settings. We recommend ending holiday mode at least one day before your return to allow your house to warm back up again. To quit an active holiday mode, press the “PRG” button and select Manual or program modes.
Open Window Function
If the T-MT detects a temperature drop of more than 3°C within 15 minutes, the controller will power off the heater. “OF” will appear on the screen and the text “Alarm! Open Window!” will be displayed. Pressing the Power button on the unit will resume normal operation, or waiting for 30 minutes will also restore normal operation.
Open Window detection will only work if the feature is activated and shown as an Open Window icon on the display (see display schematic on page 2). To activate the Open Window function, press “SET” and ‘+’ together for 3 seconds. To deactivate the Open Window function, repeat the process.
Adaptive Start
Adaptive start is an intelligent energy-saving feature that will turn on the heating in advance of the next scheduled time if the current temperature is more than 5°C below the next target temperature. (This avoids wasteful loads on the heater). Adaptive Start will only work if the feature is activated and shown as a Timer icon on the display (see display schematic on page 2). To activate the Adaptive Start feature, press “SET” and ‘-’ together for 3 seconds. To deactivate, repeat the process.
Keypad Lock
To activate the keypad lock, press the SET and Holiday Mode buttons together for 3 seconds. A shut padlock icon will appear on the screen. Press SET and Holiday Mode buttons together again for another 3 seconds to deactivate the keypad lock.

Calibration
Calibration is a process to alter the temperature of the T-MT up or down in order to align the unit with another thermostat.
The T-MT can be calibrated 5°C up or down from the default of 0 (no calibration). You can calibrate in steps of 0.5°C.
Calibrating UP (i.e. +1 °C etc) means the T-MT will display a higher temperature than the present one being shown. Use this when you think the T-MT is under-reading compared with another thermostat.
Calibrating DOWN (i.e. – 1 °C etc) means the T-MT will display a lower temperature than the present one being shown. Use this when you think the T-MT is over-reading compared with another thermostat.
When adjusting the T-MT Time & Temperature settings using the SET button, calibration is the final setting you can change. The default is 0. Use the + or – keys to adjust this figure up or down.

2 Year Warranty
Register your product at the Help & FAQs section of your local Herschel website. Within two years from the date of purchase, Herschel will repair or replace the T-MT where the fault is due to defects in materials or workmanship. This warranty is for standard domestic use only and excludes commercial uses. In the event of a warranty claim please visit the Customer Service area of the Herschel Website and follow the Warranty Claim process. You will need proof of purchase.

Note your serial number here.

Compliance
Hereby, Herschel Infrared Ltd declares that the radio equipment type T-MT Wireless
Thermostat is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address:
https://www.herschel-infrared-technology-center.com/compliance/

Select XLS

Documents / Resources

| HERSCHEL T-MT Mains Powered WiFi Thermostat [pdf] Instruction Manual
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