Heatmiser neoStat-HC1 Smart Thermostat User Manual

The Heatmiser neoStat-HC1 is a smart fan coil thermostat designed for heating, cooling, automatic heat/cool control, and ventilation systems. It is part of the neoStat Series and can connect to the neoHub for smart control through the Heatmiser neoApp.

The official user manual explains how to install the thermostat, select the correct system type, pair it with the neoHub, set comfort levels, control fan speed, use holiday and frost modes, adjust feature settings, understand error codes, follow wiring diagrams, and perform a factory reset.

Key Features

The Heatmiser neoStat-HC1 is built for fan coil and heat/cool systems. Its main features include:

• Heating and cooling control
• Auto, Heat, Cool, and Ventilation modes
• 0–10V fan output
• Manual and automatic fan speed control
• neoHub and neoApp compatibility
• Mesh network communication
• Approach sensor with backlit touch keys
• Weekday/weekend, 7-day, 24-hour, and manual programming
• Temperature hold
• Frost protection and standby mode
• Holiday mode
• Keypad lock with PIN
• Valve cycling
• Cool air proof setting
• Factory reset

Important Installation Notes

The neoStat-HC1 is designed to be flush mounted and requires a wall back box with a minimum depth of 35mm.

The manual gives these installation rules:

Do	Don’t
Mount the thermostat at eye level	Do not install near a direct heat source
Read the instructions before setup	Do not press hard on the LCD screen
Use the correct wiring diagram	Do not install without following local rules

The wiring diagram pages also state that the thermostat must only be installed by a qualified electrician and must comply with local installation regulations.

Parts and Controls

The Heatmiser neoStat-HC1 has a square LCD display and touch-sensitive navigation keys.

Main Controls

Control	Function
Left arrow	Moves through menu options
Tick key	Confirms a selection or enters a menu
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

The thermostat display includes menu options such as:

• Power
• Mode
• Fan
• Hold
• Edit
• Holiday
• Setup
• Clock
• Cancel

The currently selected option appears highlighted on the lower part of the screen.

LCD Display Icons and Indicators

The LCD screen shows temperature, operating mode, fan status, schedule status, and system warnings.

Display Icon / Item	Meaning
Mesh symbol	Thermostat is connected to the neoHub
Window icon	Window or door switch has been triggered
Frost icon	Frost protection or standby is enabled
Cool symbol	Cooling is active
Flame symbol	Thermostat is calling for heat
Holiday icon	Holiday mode is active
Day indicator	Shows current day
Until / Hold	Manual override or temperature hold is active
Mode indicator	Shows Auto, Heat, Cool, or Ventilation mode
Set icon	Settings or temperature set points are being changed
Program indicator	Shows the comfort period being edited
Keypad lock icon	Keypad lock is active
Sensor warning	Wireless sensor or window switch signal has failed
Temperature	Shows room temperature in °C or °F
Fan icons	Shows fan activity or selected fan speed
Time / date display	Used for clock, calendar, and holiday settings

Product Specifications

Specification	Detail
Product model	Heatmiser neoStat-HC1
Product type	Smart fan coil thermostat
Series	neo Stat Series
Mounting type	Flush mounted
Back box depth	35mm minimum
Input	AC230V
Fan output	0–10V fan output
Fan terminals	GND and AO
Valve terminals	V1 and V2
Main modes	Auto, Heat, Cool, Ventilation
Program modes	Non-programmable, weekday/weekend, 7 day, 24 hour
Temperature format	°C or °F
Frost protection range	7°C to 17°C
Frost default	12°C
Output delay	00 to 15 minutes
Switching differential	0.5°C, 1.0°C, 2.0°C, 3.0°C
Deadband range	2°C to 10°C
RF frequency	2.4GHz 3.54dBm
Compliance	Directive 2014/53/EU

How to Install the Heatmiser neoStat-HC1

The manual shows a four-step installation process.

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 thermostat front
   Carefully remove the front half from the back plate.
3. Place the front safely aside
   Keep the front section safe while wiring and mounting.
4. Connect the wiring
   Wire the thermostat according to the correct wiring diagram on pages 29–33 of the manual.
5. Secure the back plate
   Screw the thermostat back plate into the wall back box.
6. Attach the front panel
   Clip the front of the thermostat onto the back plate and secure it with the retaining screw.

System Type Options

The System Type setting makes sure the thermostat operation and switched outputs match the installed system.

System Type Table

System Type	Description
01	2 pipe system with manual Heat or Cool selection
02	2 pipe system, Cool only
03	2 pipe system with manual Heat or Cool and twin valve output
04	4 pipe system with Heat, Cool, and Auto
05	2 pipe system with Heat, Cool, and 2-stage heating

Key Terms

Term	Meaning
NO	Normally open switch
NC	Normally closed switch
GND	0–10V fan output ground
AO	0–10V fan output
V1	Valve output 1
V2	Valve output 2

How to Select the System Type

1. Use the Left/Right keys to highlight the power icon.
2. Press and hold Tick for 3 seconds to turn off the display.
3. Press Tick to enter Setup.
4. Press the Up key until feature 10 appears in the top-right corner.
5. Use Left/Right to select the correct system type.
6. Press Tick to confirm.

This setting is critical because it controls how the thermostat handles heating, cooling, ventilation, fan output, and valve outputs.

Pairing the neoHub

To use smart control, pair the thermostat with a Heatmiser neoHub.

neoHub Setup Steps

1. Connect the neoHub to the router using the Ethernet cable.
2. Connect the neoHub power supply.
3. Download the neoApp.
4. Register or sign in to an account.
5. Select Add neoHub in the app.
6. Follow the app instructions.
7. After the hub is added, choose Add Zone and name the zone.

Pairing the neoStat-HC1 with the neoHub

1. On the neoStat-HC1, use Left/Right to select the power icon.
2. Press and hold Tick.
3. When SETUP appears, press Tick once.
4. Feature 01 appears.
5. Press Tick again to pair the thermostat to the neoHub.
6. The mesh symbol flashes on the display.
7. When pairing succeeds, the mesh symbol stays permanently displayed.

The manual notes that the neoHub only needs to be paired to the account once. Additional thermostats can be added through the app using the Add Thermostat option.

What Is a Mesh Network?

Heatmiser neo thermostats use a mesh network. This means compatible neo devices can send and receive signals through other thermostats on the network until the signal reaches the neoHub.

This helps improve:

• Wireless range
• Network stability
• Communication between devices
• Smart control reliability

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

Approach Sensor

The neoStat-HC1 includes an approach sensor. When someone moves close to the thermostat, the touch keys and backlight turn on automatically.

This makes the thermostat easier to adjust in low-light rooms or at night.

Temperature Display

The thermostat always shows the ambient room temperature. If wireless remote sensors are paired through a neoHub, the thermostat can display an averaged temperature between the thermostat and the remote sensors.

View Set Temperature in Heat or Cool Mode

1. Press Up or Down once.
2. The set temperature appears.
3. Press Tick to return to the main screen.

View Set Temperatures in Auto Heat/Cool Mode

1. Press Up or Down once.
2. The current active set temperature appears first.
3. Press Tick to view the next set temperature.
4. Press Tick again to return to the main screen.

The SET screen times out after 5 seconds if Tick is not pressed.

Power On and Off

The flame icon shows that heating is active. If the flame icon is not displayed, there is no heat demand, but the thermostat remains active.

Turn the Thermostat Off

1. Scroll to the Power icon.
2. Hold Tick for about 3 seconds.
3. The display goes blank.
4. Heating output turns off.

Turn the Thermostat Back On

Press Tick once.

Setting the Time and Date

1. Use Left/Right to select the power icon.
2. Press and hold Tick to turn off the main 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 the same process for month, date, and time.
8. Press Tick to save the new clock settings.
9. Use the Down arrow to select the power icon.
10. Press Tick to turn the display back on.

Mode Select

The neoStat-HC1 can work as a heating/cooling thermostat and fan ventilation controller. Available modes depend on the selected system type.

Common operating modes include:

• Auto
• Cool
• Heat
• Ventilation

How to Select a Mode

1. Use Left/Right to scroll to MODE.
2. Press Tick.
3. Repeatedly press Tick to select the mode.

Fan Speed Control

The neoStat-HC1 supports manual and automatic fan control.

Manual Fan Speeds

• Low
• Medium
• High

Automatic Fan Speed Logic

In Auto fan mode, the thermostat selects fan speed based on the difference between set temperature and actual room temperature.

Temperature Difference	Fan Speed
1°C / 2°F	Low fan
2°C / 4°F	Medium fan
3°C / 6°F	High fan

How to Select Fan Speed

1. Use Left/Right to scroll to FAN.
2. Press Tick.
3. Repeatedly press Tick to select the required speed.

Comfort Levels and Programming

The thermostat supports three program modes and one manual option:

Program Mode	Description
Weekday/Weekend	Separate weekday and weekend schedules
7 Day	Each day can have its own schedule
24 Hour	Same schedule every day
Non-programmable	Simple manual temperature control

Default Heating Schedule

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

Default Cooling Schedule

Period	Time	Temperature
Wake	07:00	23°C
Leave	09:00	26°C
Return	16:00	23°C
Sleep	22:00	26°C

Unused comfort levels should be set to –:–, so the thermostat skips them.

How to Set Comfort Levels

1. 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 to edit.
6. Set the hour using Up/Down.
7. Press Tick.
8. Set the minutes using Up/Down.
9. Press Tick.
10. Set the temperature using Up/Down.
11. Press Tick.
12. Repeat for Leave, Return, and Sleep.
13. Set unused periods to –:–.
14. Scroll to DONE and press Tick.

In Auto mode, users must set both Heat and Cool temperatures for each comfort level.

Manual Temperature Control

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

In Auto mode, both Heat and Cool temperatures must be set. Manual changes remain active only until the next programmed comfort level.

Temperature Hold

Temperature Hold lets users override the current schedule for a selected time.

How to Set Temperature Hold

1. 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 remaining hold time. When the countdown ends, the thermostat returns to the normal program.

Cancel Temperature Hold

1. Scroll to HOLD.
2. Press Tick twice.

Locking and Unlocking the neoStat-HC1

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

Lock the Thermostat

1. 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.
6. Use Up/Down to enter the second two digits.
7. Press Tick.
8. The keypad lock icon appears.

Unlock the Thermostat

1. Press Tick once.
2. Enter the four-digit PIN.
3. Confirm the first two digits and second two digits using Tick.
4. The keypad unlocks and returns to the main screen.

Frost Protection and Standby

Frost protection keeps the heating available only when room temperature drops below the frost protection temperature.

Enable or Disable Frost Protection

1. Scroll to the Power icon.
2. Press Tick.
3. The frost icon toggles on or off.

In frost mode, the thermostat shows the frost icon. If heating turns on, the flame symbol appears.

In cooling and ventilation mode, the thermostat goes into Standby.

Holiday Mode

Holiday mode reduces the heating set temperature to the frost protection temperature until a selected return date and time.

Important Holiday Note

If the thermostat is left in Cool only mode, holiday mode places it into standby, so frost protection will not be available.

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 after each setting.

Holiday mode starts immediately and returns to the normal program at the configured time and date.

Cancel Holiday Mode

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

Ventilation Mode

Ventilation mode provides fan-only control. There is no heating or cooling output in this mode.

Select Ventilation Mode

1. Scroll to MODE.
2. Press Tick.
3. Repeatedly press Tick until Ventilation mode is selected.

Change Fan Speed in Ventilation Mode

1. Scroll to FAN.
2. Repeatedly press Tick to select low, medium, high, or off.

Auto fan is not used in Ventilation mode.

Feature Menu Settings

The feature menu is used to configure key thermostat behavior.

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	Optimum start	00 to 05 hours
07	Rate of change	Minutes to raise temperature by 1°C
08	Program mode	Non-programmable, weekday/weekend, 7 day, 24 hour
09	Temperature format	°C or °F
10	System type	01 to 05
11	Deadband	2°C to 10°C
12	Constant fan	Off / On
13	Cool air proof	Disabled or 5, 10, 15, 30, 60, 90 seconds
14	Valve cycling	Weekly or monthly valve operation options

Feature Menu Highlights

Switching Differential

Switching differential controls how much the temperature can change before the thermostat switches heating or cooling. With a 1°C differential and a 20°C set temperature, heating switches on at 19°C and off at 20°C.

Deadband

Deadband is used in Auto heat/cool mode. It keeps enough space between Heat and Cool set points to stop both systems from working against each other.

Constant Fan

When enabled, the fan runs during heating or cooling demand and continues at low speed after demand ends. When disabled, the fan switches off when demand ends.

Cool Air Proof

Cool Air Proof delays the fan when heating starts, allowing the coil valve to open first. This helps avoid blowing cold air during heating demand.

Valve Cycling

Valve Cycling operates each valve for 5 minutes if the thermostat outputs have not been used for a selected period. This helps prevent valves from staying idle for too long.

How to Adjust Feature Menu Settings

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

Re-Calibrating the Thermostat

The manual warns that recalibrating the thermostat could cause incorrect operation. Users should call the support line before performing this procedure.

Re-Calibration Steps

1. 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 back on.

Error Codes and Troubleshooting

The manual lists one error code for this thermostat.

Error Code	Meaning	Recommended Action
E0	Internal sensor fault	Contact Heatmiser/IMI Heatmiser support or a qualified installer

Common Troubleshooting Guide

Problem	Possible Cause	What to Do
No heating output	Thermostat may be off or set temperature reached	Check power status and flame icon
Cooling is not working	Wrong mode or system type selected	Check Mode and Feature 10
Fan does not run	Fan setting, system type, or demand status may prevent fan output	Check FAN menu and system type
Touch keys do not respond	Keypad lock is enabled	Unlock using the four-digit PIN
Mesh icon disappeared	Connection to neoHub has been lost	Check neoHub power, router connection, and app pairing
Sensor warning flashes	Wireless sensor or window switch signal is missing	Check paired sensor or window switch
Holiday mode has no frost protection	Thermostat may be in Cool only mode	Change mode before using holiday protection
Temperature seems inaccurate	Calibration may be incorrect	Contact support before recalibrating

Wiring Diagram Summary

The official manual includes wiring diagrams for several system types. The diagrams show AC230V input, 0–10V fan output, valve connections, and terminal labels including N, GND, AO, n/a, V1, V2, and L.

Wiring Diagrams Included

Wiring Diagram	System Type
Normally Closed Valve	System Types 01 and 02
Normally Open Valve	System Types 01 and 02
3 Wire Valve Connection	System Types 01 and 02
Fan Coil & Wet Systems	System Types 03 and 05
Heat & Cool Valves	System Type 04

The diagrams confirm that the neoStat-HC1 uses 0–10V fan output through GND and AO, unlike standard 3-speed switched fan wiring.

Factory Reset

A factory reset clears setup and pairing parameters. After resetting, the thermostat must be set up and paired again.

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 will be highlighted.
4. Press and hold Tick for 10 seconds.
5. All display icons appear for 2 seconds.
6. The setup entry screen appears.
7. Use the Down key to highlight the required option.
8. Press Tick.
9. The thermostat returns to the main display.

Support and Contact

IMI Heatmiser provides technical support, PDFs, FAQs, videos, and specifications through its official support channels.

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

Read Official User Manual(PDF)