Heatmiser neoStat-e V3 Heating Smart Thermostat User Manual

The Heatmiser neoStat-e V3 is a smart thermostat from the IMI Heatmiser neo Series. It is designed for electric heating control and can also operate as a time clock. In thermostat mode, it controls heating based on sensor readings, programmed comfort levels, and user settings. In time clock mode, it controls timed output schedules.

The official manual covers installation, mode selection, neoHub pairing, mesh network setup, temperature display, clock setup, comfort levels, temperature hold, keypad lock, frost protection, holiday mode, optional features, recalibration, error codes, floor probe settings, wiring diagrams, factory reset, and Heatmiser support details.

What Is a Programmable Room Thermostat?

A programmable room thermostat combines two functions:

Function	Purpose
Programmer	Sets heating ON/OFF times based on the user’s schedule
Room thermostat	Measures temperature and switches heating on or off to reach the set temperature

The manual explains that setting the thermostat to a higher temperature does not heat the room faster. Heating speed depends on the design and size of the heating system. For better energy control, users should find the lowest comfortable temperature and let the thermostat follow the programmed schedule.

Key Features

The Heatmiser neoStat-e V3 includes:

• Smart thermostat operation through neoHub and neoApp
• Thermostat mode and time clock mode
• Electric heating control
• Flush-mounted design
• Mesh network communication
• Approach sensor with backlit touch keys
• Built-in air, remote air, and floor sensor options
• Room and floor temperature display
• Weekday/weekend, 7-day, and 24-hour programming
• Non-programmable thermostat mode
• Temperature hold
• Frost protection
• Holiday mode
• Keypad lock with PIN
• Floor temperature limit
• 10K, 12K, and 15K floor probe support
• Error code display
• Factory reset

Important Safety and Installation Notes

The neoStat-e V3 is designed to be flush mounted and needs a wall back box with a minimum depth of 35mm.

Installation Do’s and Don’ts

Do	Don’t
Mount the thermostat at eye level	Do not install near a direct heat source
Read the instructions fully before setup	Do not press hard on the LCD screen
Follow the wiring diagram carefully	Do not block airflow around the thermostat

The manual states that the thermostat must only be installed by a qualified electrician and must comply with local installation regulations.

Parts and Controls

The neoStat-e V3 has a square LCD display with five touch-sensitive keys.

Main Controls

Control	Function
Left arrow	Moves through menu options
Tick key	Confirms selections and enters menus
Right arrow	Moves through menu options
Down key	Lowers temperature, time, or setting values
Up key	Raises temperature, time, or setting values

Main Menu Options

Depending on the selected mode, the display may show:

• Power
• Setup
• Clock
• Hold
• Holiday
• Edit
• Cancel
• Done

Product Specifications

Specification	Detail
Product model	Heatmiser neoStat-e V3
Product type	Electric heating smart thermostat
Series	neo Series
Mounting type	Flush mounted
Back box depth	35mm minimum
Operating modes	Mode 1 Thermostat, Mode 2 Time Clock
Default mode	Thermostat mode
App control	Heatmiser neoApp via neoHub
Network type	Heatmiser mesh network
Sensor options	Built-in sensor, remote air sensor, floor sensor, built-in + floor, remote air + floor
Supplied floor probe	10K floor sensor probe
Compatible probe values	10K, 12K, 15K
Floor temperature limit	20°C to 45°C
Floor limit default	28°C
Frost protection range	7°C to 17°C
Frost default	12°C
Switching differential	0.5°C, 1.0°C, 2.0°C, 3.0°C
Output delay	00 to 15 minutes
Program modes	Non-programmable, weekday/weekend, 7 day, 24 hour
Temperature format	°C or °F
Maximum heating load	16A max for matting or wire
RF frequency	2.4GHz 3.54dBm
Compliance	Directive 2014/53/EU

How to Install the Heatmiser neoStat-e V3

Installation Steps

1. Loosen the retaining screw
   Use a small screwdriver to slightly loosen the screw on the bottom face of the thermostat.
2. Separate the front from the back plate
   Carefully remove the front half from the back plate.
3. Place the thermostat front safely aside
   Keep the front section protected while wiring and mounting.
4. Connect the wiring
   Terminate the thermostat according to the wiring diagram shown in the manual. Thermostat wiring is shown on page 29, while time clock wiring is shown on page 35.
5. Secure the back plate
   Screw the back plate into the wall back box.
6. Refit the thermostat front
   Clip the front onto the back plate and secure it with the retaining screw.

Mode Select: Thermostat or Time Clock

The neoStat-e V3 can operate in two modes.

Mode	Function
Mode 1	Thermostat
Mode 2	Time Clock

Thermostat mode is the default setting.

How to Change Mode

1. Use Left/Right to scroll to the power icon.
2. Press and hold Tick for 3 seconds.
3. When SETUP appears, press and hold Tick for 10 seconds.
4. Use Left/Right to select the required mode.
5. Choose:
   • Mode 1 = Thermostat
   • Mode 2 = Time Clock
6. Press Tick to confirm.

The neoStat-e returns to the main display for the selected mode.

Pairing the neoHub

The neoHub connects the thermostat to the Heatmiser neoApp.

neoHub Pairing Steps

1. Connect the neoHub to the router using the supplied Ethernet cable.
2. Connect the power supply to the neoHub.
3. Wait for the router to assign an IP address.
4. The Link LED lights red when connected to the network.
5. The Link LED turns green when connected to the Heatmiser cloud server.
6. Connect the phone or tablet to the same Wi-Fi network as the router.
7. Download the free Heatmiser neoApp from the Apple App Store or Google Play.
8. Register or sign in to an account.
9. Select Add Location.
10. Press the connect button on the neoHub.
11. Enter a location title, such as Home.

Pairing the neoStat-e V3 with neoHub

The manual recommends pairing the neoStat-e closest to the neoHub first.

Pairing Steps

1. In the neoApp, select Add neoStat.
2. Enter a preset or custom title.
3. Press Next.
4. On the neoStat-e, use Left/Right to select the power icon.
5. Press and hold Tick.
6. When SETUP appears, press Tick once.
7. Feature 01 appears.
8. Press Tick again to pair the neoStat-e to the neoHub.
9. The mesh symbol flashes.
10. Once paired, the mesh symbol stays permanently displayed.
11. Press Add Another for more zones or Finish to complete setup.

What Is a Mesh Network?

Heatmiser neoStats use a mesh network. This lets compatible neoStats send and receive signals through other thermostats on the network until the signal reaches the neoHub.

This helps improve:

• Communication range
• Network stability
• Smart control reliability

If the mesh symbol disappears, the thermostat has lost connection to the neoHub.

Approach Sensor

The neoStat-e uses proximity detection. When someone approaches the thermostat, the touch keys and backlight turn on automatically.

This makes it easier to adjust the temperature or timer in a dark room.

Mode 1: Thermostat Mode

LCD Display in Thermostat Mode

Display Item	Meaning
Mesh symbol	Connected to neoHub
Day indicator	Shows day of the week
Frost protection icon	Frost protection is enabled
Flame symbol	Heating demand is active; flashes during optimum start
Holiday icon	Holiday mode is active
Floor limit symbol	Floor probe has reached the floor limit
Floor/Room Temp	Shows active sensor mode
Set	Set point is being changed
Program indicator	Shows comfort level being edited
Main menu	Shows selected menu option
Keypad lock	Keypad is locked
Temperature	Shows current sensor temperature
Temperature format	°C or °F
Hold Left	Temperature hold is active
Time/Day/Month/Year	Used for clock, calendar, or holiday setup

Temperature Display and Sensor Options

The neoStat-e can use different sensor options:

• Built-in air sensor
• Remote air sensor
• Floor sensor only
• Built-in air sensor and floor sensor
• Remote air sensor and floor sensor

The screen clearly shows either Room Temp or Floor Temp before the temperature value.

When both air and floor sensors are enabled, room temperature appears by default. To view the floor temperature, press and hold the Left and Right arrow keys for 5 seconds.

Setting the Clock

1. Use Left/Right to scroll to the power icon.
2. Press and hold Tick to turn off the display.
3. Use the Right arrow to select CLOCK.
4. Press Tick to confirm.
5. Use Up/Down to set the year.
6. Press Tick.
7. Repeat for month, date, and time.
8. Press Tick to confirm the new clock settings.
9. Use the Down arrow to scroll back to the power icon.
10. Press Tick to turn the display on.

Comfort Levels and Programming

The neoStat-e supports three programming modes and one manual mode.

Program Mode	Description
Weekday/Weekend	Weekdays share one schedule, weekends can have a different schedule
7 Day	Each day can have its own comfort levels
24 Hour	Same schedule repeats every day
Non-programmable	Manual temperature control only

When the thermostat is connected to the mesh network, the system program mode is configured using the neoApp.

Default Comfort Levels

Period	Time	Temperature
Wake	07:00	21°C
Leave	09:00	16°C
Return	16:00	21°C
Sleep	22:00	16°C

Unused comfort levels should be set to –:–.

How to Set Comfort Levels

1. Use Left/Right to scroll to EDIT.
2. Press Tick.
3. Use Left/Right to select the day or period.
4. Press Tick.
5. When WAKE flashes, press Tick.
6. Use Up/Down to set the hour.
7. Press Tick.
8. Use Up/Down to set the minutes.
9. Press Tick.
10. Use Up/Down to set the temperature.
11. Press Tick.
12. Press the Right arrow to move to LEAVE.
13. Repeat for all comfort levels.
14. Set unused periods to –:–.
15. Scroll to DONE and press Tick.

Temperature Control

To adjust the set temperature:

1. Press Up or Down.
2. The display shows SET and the desired temperature.
3. Use Up/Down to adjust the set value.
4. Press Tick to confirm.

This new temperature stays active only until the next programmed comfort level. Then the thermostat returns to the programmed schedule.

Temperature Hold

Temperature Hold overrides the current program for a selected duration.

How to Set Temperature Hold

1. Use Left/Right to scroll to HOLD.
2. Press Tick.
3. Use Up/Down to set the hold period.
4. Press Tick.
5. Use Up/Down to set the hold temperature.
6. Press Tick.

The display shows HOLD LEFT, and the timer counts down before returning to the normal program.

Cancel Temperature Hold

With HOLD selected, press Tick, then press Tick again while Cancel is highlighted.

Locking and Unlocking the neoStat-e V3

The thermostat includes a keypad lock with a four-digit PIN.

Lock the Thermostat

1. Use Left/Right to scroll to HOLD.
2. Press and hold Tick for 10 seconds.
3. The display shows 0000.
4. Use Up/Down to enter the first two digits.
5. Press Tick to confirm.
6. Use Up/Down to enter the second two digits.
7. Press Tick to confirm.
8. The keypad lock indicator appears.

Unlock the Thermostat

1. Press Tick once.
2. The display shows 00:00.
3. Enter the four-digit PIN using Up/Down and Tick.
4. The display unlocks and returns to the main screen.

Frost Mode

Frost mode keeps heating off unless the room temperature drops below the frost protection temperature.

Enable or Disable Frost Mode

1. Use Left/Right to scroll to the power icon.
2. Press Tick.
3. The frost icon toggles on or off.

If heating starts during frost mode, the flame symbol appears.

Power On and Off

The flame symbol shows when heating is active. If the flame symbol is not shown, there is no heating demand, but the thermostat remains active.

Turn the Thermostat Off Completely

1. Scroll to the power icon.
2. Hold Tick for about 3 seconds until the display goes blank.
3. The display and heating output turn off.

Turn the Thermostat Back On

Press Tick once.

Holiday Mode

Holiday mode works differently depending on the selected mode.

In Thermostat Mode

Holiday mode reduces the home temperature to the frost protection temperature. The thermostat maintains that temperature until the holiday period ends, then returns to the normal program.

In Time Clock Mode

Holiday mode keeps the timed output OFF until the configured return date and time.

Set Holiday Mode

1. Scroll to HOLIDAY.
2. Press Tick.
3. Use Up/Down to set the year.
4. Press Tick.
5. Set the month, date, and time.
6. Press Tick to confirm each value.

Holiday mode starts immediately and returns to normal operation at the selected date and time.

Cancel Holiday Mode

1. Scroll to HOLIDAY.
2. Press Tick.
3. When CANCEL is highlighted, press Tick.

Optional Thermostat Features

Feature	Description	Settings
01	Pairing to neoHub	Adds zone to neoHub
02	Switching differential	0.5°C, 1.0°C, 2.0°C, 3.0°C
03	Frost protection temperature	7°C to 17°C
04	Output delay	00 to 15 minutes
05	Up/down temperature limit	00°C to 10°C
06	Sensor selection	Built-in, remote air, floor, built-in + floor, remote air + floor
07	Floor temperature limit	20°C to 45°C
08	Optimum start	00 to 05 hours
09	Rate of change	Minutes to raise temperature by 1°C
10	Not used	Not used
11	Not used	Not used
12	Program mode	Non-programmable, weekday/weekend, 7 day, 24 hour
13	Temperature format	°C or °F

Important Floor Heating Sensor Note

The manual states that air sensor only must not be used to control electric underfloor heating. For electric underfloor heating, use floor sensor only or air sensor + floor sensor mode.

How to Adjust Optional Settings

1. Use Left/Right to scroll to the power icon.
2. Press and hold Tick for 3 seconds.
3. When SETUP appears, press Tick once.
4. Use Up/Down to scroll through features.
5. Use Left/Right to adjust the selected feature setting.
6. Press Tick to confirm and exit.

Re-Calibrating the Thermostat

1. Use Left/Right to scroll to the power icon.
2. Press and hold Tick to turn the display off.
3. Press and hold Tick + Down together for 10 seconds.
4. The current temperature appears.
5. Use Up/Down to set the new temperature value.
6. Press Tick to confirm.
7. Use the Down arrow to highlight the power icon.
8. Press Tick once to turn the thermostat on.

Error Codes

Error Code	Meaning	Recommended Action
E0	Internal sensor fault	Contact IMI Heatmiser support or a qualified installer
E1	Remote floor probe not connected, wired incorrectly, or faulty	Check floor probe wiring and probe type
E2	Remote air probe not connected, wired incorrectly, or faulty	Check remote air probe wiring

Floor Temperature Sensor Probe Type

The neoStat-e is supplied with a 10K floor sensor probe and is also compatible with 12K and 15K probe values.

Change Floor Probe Type

1. Use Left/Right to scroll to the power icon.
2. Press and hold Tick to turn the display off.
3. Press and hold Up + Down together for 5 seconds.
4. Use Left/Right to select:
   • 10 = 10K probe
   • 12 = 12K probe
   • 15 = 15K probe
5. Press Tick to confirm.

The manual states that probe type changes should only be carried out by an experienced technician who has accurately verified the probe value.

Wiring Diagram

The thermostat wiring diagram shows a 230VAC electric heating installation with:

• Mains supply through RCD
• Live and neutral
• Load output
• Matting or wire, 16 amp max
• Floor probe connection
• Optional remote air probe
• Terminals including RT1, -, RT2, N, N, LOAD, and L

The wiring page states that the product must only be installed by a qualified electrician and must comply with local installation regulations.

Factory Reset

A factory reset clears all setup and pairing settings. Setup and pairing must be repeated after reset.

Factory Reset Steps

1. Use Left/Right to scroll to the power icon.
2. Press and hold Tick to turn the display off.
3. SETUP appears.
4. Press and hold Tick for 10 seconds.
5. All display icons appear for 2 seconds.
6. The number 1 or 2 flashes.
7. Use Left/Right to choose:
   • Mode 1 = Thermostat
   • Mode 2 = Time Clock
8. Press Tick to confirm.

Mode 2: Time Clock Mode

In Time Clock Mode, the neoStat-e controls a timed output instead of temperature-based heating.

Time Clock LCD Display

Display Item	Meaning
Mesh symbol	Connected to neoHub
Day indicator	Shows day of the week
Holiday icon	Time clock is in holiday mode
Set	Settings are being changed
Program indicator	Switching period being edited
Main menu	Shows selected option
Keypad lock	Keypad is locked
Timer status	Shows timed output state
Hold Left	Timer hold is active
Time/Day/Month/Year	Used during clock, calendar, or holiday setup

Setting Switching Times in Time Clock Mode

1. Use Left/Right to scroll to EDIT.
2. Press Tick.
3. Use Left/Right to select the day or period.
4. Press Tick.
5. Switching time 1 flashes, and the current ON time appears.
6. Press Down to view the OFF time.
7. Select a switching time and press Tick.
8. Set ON hours with Up/Down.
9. Press Tick.
10. Set ON minutes.
11. Press Tick.
12. Set OFF hours.
13. Press Tick.
14. Set OFF minutes.
15. Press Tick.
16. Press the Right arrow to move to the next switching time.
17. Repeat for all periods.
18. Set unused periods to –:–.
19. Scroll to DONE and press Tick.

Timer Override

Timer Override turns the timed output on for a selected duration.

Timer Override Steps

1. Use Up/Down to set the override duration, such as 02:00.
2. Press Tick to confirm.
3. The display returns to the main screen.
4. Hold Left and the remaining time appear.

Time Clock Optional Settings

Feature	Description	Settings
01	Pairing to neoHub	Connects time clock to neoHub
02	Program mode	Weekday/weekend, 7 day, or 24 hour

Troubleshooting Guide

Problem	Possible Cause	Recommended Action
Mesh symbol disappears	neoHub connection lost	Check neoHub power, router connection, and app pairing
Heating does not turn on	Room temperature may already be above set point	Check flame icon and set temperature
Floor limit icon appears	Floor temperature limit reached	Check Feature 07 floor limit
Buttons do not respond	Keypad lock is active	Unlock with the four-digit PIN
E0 appears	Internal sensor fault	Contact support or installer
E1 appears	Floor probe issue	Check floor probe wiring and selected probe type
E2 appears	Remote air probe issue	Check remote air probe wiring
Time clock output stays off	Holiday mode or switching times issue	Check holiday mode and timer schedule
Temperature seems inaccurate	Calibration may need adjustment	Use recalibration steps carefully
Electric floor heating control is unsafe	Air sensor only selected	Change to floor sensor or air + floor sensor mode

Support and Contact

IMI Heatmiser provides technical support, PDFs, FAQs, and product specifications.

IMI Heatmiser Support

Support phone: +44 (0)1254 669090
Website: www.heatmiser.com

Address:
IMI Heatmiser
Units 1-5 Hurstwood Court, Mercer Way
Shadsworth Business Park
Blackburn, Lancashire, BB1 2QU
United Kingdom

The manual states that Heatmiser UK Ltd declares the radio equipment complies with Directive 2014/53/EU. RF frequency is listed as 2.4GHz 3.54dBm.

Official User Manuals (PDF)