neoStat-HC1 Thermostat

Heatmiser Smart Thermostat neoStat-HC1

The IMI Heatmiser neoStat-HC1 is a smart, programmable fan coil thermostat designed to control heating, cooling, and ventilation systems. It supports two-pipe and four-pipe installations, providing temperature regulation, fan speed adjustment, valve control, and programmable comfort settings.

The neoStat-HC1 uses a 0–10V fan control output, with automatic and manual Low, Medium, and High fan speed settings. Five selectable system configurations allow the thermostat to operate with different heating, cooling, and valve arrangements.

The thermostat features an LCD display, touch-sensitive navigation keys, an approach sensor, frost protection, holiday programming, temperature hold, and a four-digit keypad lock. When paired with a compatible Heatmiser neoHub, it can communicate through the neo mesh network and connect to the Heatmiser neoApp.

Product Overview and Technical Specifications

The neoStat-HC1 provides configurable control for fan coil heating and cooling systems, with separate switching outputs for connected valves and a 0–10V fan output.

Parts, Controls, and LCD Display

The neoStat-HC1 has a front LCD display and five touch-sensitive navigation buttons below the screen.

The thermostat also includes an approach sensor that detects when someone moves toward the device and illuminates the controls and display backlight.

Touch Control Buttons

The action performed by the Tick button depends on the highlighted menu option and whether it is pressed briefly or held.

LCD Display Indicators

The LCD provides information about room temperature, heating and cooling demand, fan operation, wireless communication, and programmed settings.

Heating and Cooling Status

The flame symbol appears when the thermostat is requesting heating.

When the flame symbol disappears, heating is not currently required to maintain the selected temperature, although the thermostat remains active.

The cooling symbol identifies active cooling operation.

Approach Sensor

The neoStat-HC1 uses proximity detection to illuminate the touch controls and LCD backlight when someone approaches.

The illuminated controls make it easier to identify and operate the thermostat in a dark room.

Installation Instructions

The neoStat-HC1 is designed for flush mounting into a wall back box.

A minimum back box depth of 35 mm is required.

Important Installation Requirements

• Mount the thermostat at eye level.
• Do not install it near a direct heat source because this may affect operation.
• Do not press forcefully against the LCD screen, as permanent damage may occur.
• Install the thermostat using the correct wiring arrangement for the configured System Type.
• The thermostat must be installed by a qualified electrician in accordance with local installation regulations.

Step 1: Remove the Front Panel

1. Locate the retaining screw on the bottom edge of the thermostat.
2. Use a small screwdriver to loosen the screw slightly.
3. Carefully separate the thermostat front panel from the back plate.
4. Place the front panel somewhere safe.

Step 2: Complete the Electrical Connections

The electrical connections must follow the manufacturer’s wiring diagram corresponding to the selected system configuration.

The manual provides separate diagrams for normally closed valves, normally open valves, three-wire valves, fan coil and wet systems, and separate heating and cooling valves.

The connection arrangement must be completed by a qualified electrician.

Step 3: Install the Back Plate

1. Position the back plate against the recessed wall back box.
2. Align the mounting holes.
3. Secure the back plate to the box using screws.

Step 4: Reattach the Front Panel

1. Position the front panel against the installed back plate.
2. Carefully clip the front section into place.
3. Tighten the retaining screw at the base of the thermostat.

The illustrated installation procedure appears on PDF pages 4–5.

Understanding the 0–10V Fan Control

The neoStat-HC1 uses a 0–10V fan output, identified by the GND and AO terminals.

These terminals are shown in the wiring diagrams for connecting a compatible 0–10V controlled fan.

The thermostat supports automatic fan adjustment and manual selection of Low, Medium, and High speeds according to the selected system configuration.

Fan Control Terminals

The 0–10V fan connections are separate from the 230V AC mains and switched valve terminals shown in the manufacturer’s diagrams.

The exact connection arrangement must follow the wiring diagram for the installed equipment.

Selecting the Correct System Type

The System Type setting determines which heating, cooling, fan, and valve functions are available.

Five System Types can be selected.

System Type 01: Two-Pipe Heating or Cooling

System Type 01 supports manually selected heating or cooling, together with ventilation.

The thermostat supports normally open and normally closed valve connections.

Available functions include:

• Heating
• Cooling
• Ventilation
• Automatic and manual fan operation during heating
• Automatic and manual fan operation during cooling
• Manual three-speed fan control during ventilation

Outputs:

• Fan: GND and AO
• V1: Normally Open
• V2: Normally Closed

System Type 02: Two-Pipe Cooling Only

System Type 02 is designed for cooling and ventilation operation.

Heating control is not available with this setting.

Available functions include:

• Cooling
• Ventilation
• Automatic and manual fan operation during cooling
• Manual three-speed fan control during ventilation

Outputs:

• Fan: GND and AO
• V1: Normally Open
• V2: Normally Closed

System Type 03: Two-Pipe Heating and Cooling With Twin Valve Outputs

System Type 03 supports separate heating and cooling valve outputs.

The available operating modes are Heat, Cool, Auto, and Ventilation.

Fan control is provided during cooling and ventilation, but the thermostat does not provide a fan output during heating.

Outputs:

• Fan: GND and AO
• V1: Cooling
• V2: Heating

Fan operation:

• Cooling: Automatic or manual
• Ventilation: Manual three-speed
• Heating: No fan output

System Type 04: Four-Pipe Heating and Cooling

System Type 04 supports separate heating and cooling valves in a four-pipe system.

It provides Heat, Cool, Auto, and Ventilation modes.

Fan control is available in all these modes.

Outputs:

• Fan: GND and AO
• V1: Cooling
• V2: Heating

Fan operation:

• Heat: Automatic or manual
• Cool: Automatic or manual
• Auto: Automatic or manual
• Ventilation: Manual three-speed

System Type 05: Two-Pipe Cooling With Two-Stage Heating

System Type 05 provides cooling and two-stage heating control.

The first heating stage does not activate the fan output. The second heating stage supports automatic or manual fan operation.

Cooling and ventilation also support fan control.

Outputs:

• Fan: GND and AO
• V1: Cooling and second-stage heating
• V2: Heating

Fan operation:

• First-stage heating: No fan output
• Second-stage heating: Automatic or manual
• Cooling: Automatic or manual
• Ventilation: Manual three-speed

System Type Comparison

How to Configure the System Type

1. Use Left and Right to highlight the Power symbol.
2. Press and hold Tick for 3 seconds to switch off the display.
3. Press Tick to enter SETUP.
4. Repeatedly press Up until Feature 10 appears in the upper-right corner.
5. The large central number shows the selected System Type.
6. Use Left and Right to choose a value from 01 to 05.
7. Press Tick to confirm the selection.

The selected System Type must match the installed heating, cooling, and valve arrangement.

Pairing the neoStat-HC1 With the neoHub

The neoStat-HC1 can communicate with a compatible Heatmiser neoHub using the neo mesh network.

The hub must first be connected to a router and added to the neoApp account.

Step 1: Connect the neoHub

1. Connect the neoHub to the router using the Ethernet cable supplied with the hub.
2. Connect the neoHub power supply.

Step 2: Set Up the neoApp

1. Download the Heatmiser neoApp.
2. Register an account.
3. Sign in.
4. Select Add neoHub.
5. Follow the app instructions to pair the hub with the account.

Step 3: Add the Thermostat Zone

1. Select Add Zone in the neoApp.
2. Enter a name for the zone.
3. Begin the pairing countdown when prompted.

Step 4: Activate Pairing on the neoStat-HC1

1. Use Left and Right to highlight the Power symbol.
2. Press and hold Tick.
3. When SETUP is highlighted, press Tick once.
4. Feature 01 appears.
5. Press Tick again to activate pairing.

The mesh symbol begins flashing.

When the thermostat connects successfully, the mesh symbol remains continuously displayed.

Step 5: Complete the Setup

In the neoApp:

• Select ADD ANOTHER to add another zone.
• Select FINISH to complete setup.

The neoHub only needs to be paired with the account once.

Additional compatible thermostats can be added through the + icon and Add Thermostat option.

Understanding the neo Mesh Network

The neoStat-HC1 uses mesh network communication.

Compatible neoStat thermostats can send and receive signals through other thermostats on the network.

This allows communication to be relayed between devices until the signal reaches its destination.

Mesh Connection Indicator

The mesh icon appears when the neoStat-HC1 is communicating with the neoHub.

If the mesh icon disappears, the thermostat has lost its connection with the neoHub.

Temperature Display and Set Temperature

The main display shows ambient room temperature.

When wireless remote sensors are paired through a neoHub, the thermostat displays an average temperature calculated from the thermostat and paired sensor readings.

Viewing the Set Temperature in Heat or Cool Mode

1. Press Up or Down once.
2. The selected target temperature appears.
3. Press Tick to return to the main display.

Viewing Heat and Cool Set Temperatures in Auto Mode

1. Press Up or Down once.
2. The currently active HEAT or COOL set temperature appears first.
3. Press Tick to view the other set temperature.
4. Press Tick again to return to the main display.

The SET screen automatically closes after five seconds if Tick is not pressed.

Turning the Thermostat On and Off

Turning the Thermostat Off

1. Use Left and Right to highlight the Power symbol.
2. Press and hold Tick for approximately 3 seconds.
3. The display turns off.

The display and heating output are switched off.

Turning the Thermostat On

Press Tick once.

The thermostat returns to its normal operating display.

Understanding the Flame Indicator

When the flame icon appears, the thermostat is requesting heating.

When the icon is absent, heating is not currently required to reach the selected temperature.

The thermostat may remain active even when the flame icon is not displayed.

Setting the Time and Date

The neoStat-HC1 uses the time and calendar settings for heating schedules and holiday operation.

How to Set the Clock

1. Use Left and Right to select the Power symbol.
2. Press and hold Tick to turn off the display.
3. Use Right to highlight CLOCK.
4. Press Tick.
5. Use Up and Down to set the year.
6. Press Tick to confirm.
7. Repeat the procedure to set the month.
8. Set the date.
9. Set the time.
10. Press Tick to confirm the new clock settings.
11. Use Down to highlight the Power symbol.
12. Press Tick to turn the display on.

Selecting Heating, Cooling, Auto, or Ventilation Mode

The neoStat-HC1 provides different operating modes depending on the selected System Type.

Operating Modes

How to Change the Operating Mode

1. Use Left and Right to highlight MODE.
2. Press Tick.
3. Continue pressing Tick to select the required operating mode.

Only modes supported by the selected System Type are available.

Fan Speed Control

The neoStat-HC1 provides automatic and manual fan control.

Manual operation allows Low, Medium, or High fan speed selection.

In Automatic Mode, the thermostat selects the fan speed according to the difference between the measured room temperature and the target temperature.

Automatic Fan Speed Selection

How to Select Fan Speed

1. Use Left or Right to highlight FAN.
2. Press Tick.
3. Repeatedly press Tick until the required fan setting is selected.

The available fan settings depend on the selected operating mode and System Type.

Programming Heating and Cooling Comfort Levels

The neoStat-HC1 supports programmable temperature control with four comfort periods:

• WAKE
• LEAVE
• RETURN
• SLEEP

The thermostat offers Weekday/Weekend, 7 Day, and 24 Hour programming.

Non-Programmable Mode is also available.

Programming Modes

Default Heating Comfort Levels

Default Cooling Comfort Levels

How to Program Comfort Levels

1. Use Left and Right to highlight EDIT.
2. Press Tick.
3. Use Left and Right to select the day or day group.
4. Press Tick.
5. WAKE begins flashing.
6. Press Tick to edit the WAKE settings.
7. Use Up and Down to set the hour.
8. Press Tick.
9. Use Up and Down to set the minutes.
10. Press Tick.
11. Use Up and Down to adjust the temperature.
12. Press Tick to confirm.

When Auto Mode is selected, the thermostat requests a COOL temperature immediately after the HEAT temperature.

13. Set and confirm the cooling temperature when required.
14. Press Right to move to LEAVE.
15. Press Tick to edit the LEAVE settings.
16. Repeat the same procedure for RETURN and SLEEP.
17. Highlight DONE and press Tick to save the program.

Disabling an Unused Comfort Period

An unused comfort period can be skipped by changing its time to –:–.

The thermostat ignores that period and continues to the next programmed comfort level.

Programming in Auto Mode

Auto Mode requires both HEAT and COOL set temperatures for each comfort level.

To disable cooling during an individual comfort period, continue pressing Up while editing the COOL temperature until –.- appears.

While a comfort period is flashing in Auto Mode, Up and Down can be used to view its heating and cooling set temperatures.

Manual Temperature Control

The current set temperature can be adjusted directly using the Up and Down controls.

How to Change the Set Temperature

1. Press Up or Down.
2. SET appears together with the selected target temperature.
3. Use Up and Down to adjust the value.
4. Press Tick to confirm and return to the main display.

In Auto Mode, both heating and cooling set temperatures must be entered.

When a programmed schedule is active, the manual temperature change remains effective until the next programmed comfort level begins.

Temperature Hold Function

Temperature Hold temporarily overrides the normal heating or cooling program.

A different target temperature can be maintained for a selected period.

How to Set Temperature Hold

1. Use Left and Right to highlight HOLD.
2. Press Tick.
3. Use Up and Down to select the hold duration.
4. Press Tick.
5. Use Up and Down to select the hold temperature.
6. Press Tick to confirm.

The HOLD LEFT indicator appears together with the remaining time.

The countdown continues until the hold period expires, after which the thermostat returns to its normal program.

Temperature Hold in Auto Mode

When Auto Mode is selected, both HEAT and COOL setpoints are required for the hold duration.

How to Cancel Temperature Hold

1. Highlight HOLD using Left or Right.
2. Press Tick twice to confirm cancellation.

Locking and Unlocking the Thermostat

The neoStat-HC1 has a four-digit PIN keypad lock.

How to Lock the Keypad

1. Highlight HOLD using Left or Right.
2. Press and hold Tick for 10 seconds.
3. The display shows 0000.
4. Use Up and Down to enter the first two digits of the PIN.
5. Press Tick.
6. Use Up and Down to enter the remaining two digits.
7. Press Tick.

The thermostat returns to the main screen and displays the keypad lock indicator.

How to Unlock the Keypad

1. Press Tick once.
2. The display shows 00:00.
3. Enter the first two digits of the previously configured PIN using Up and Down.
4. Press Tick.
5. Enter the remaining two digits.
6. Press Tick.

The keypad unlocks and returns to the main display.

The lock symbol appears only while the lock is active.

Frost Protection and Standby Mode

Frost Protection maintains a reduced temperature when ordinary heating is not required.

How to Activate Frost Protection

1. Use Left or Right to highlight the Power symbol.
2. Press Tick once.

The frost protection icon appears.

In heating operation, the thermostat requests heating only when the measured room temperature falls below the selected frost protection temperature.

When heating is active during frost protection, the flame icon appears.

How to Cancel Frost Protection

1. Highlight the Power symbol.
2. Press Tick once.

The frost icon disappears.

Frost Protection Settings

The factory default frost protection temperature is 12°C.

The temperature can be configured through Feature 03.

Standby in Cooling and Ventilation Modes

When the frost protection function is selected while the thermostat is operating in Cool or Ventilation Mode, the thermostat enters Standby Mode.

Holiday Mode

Holiday Mode maintains the frost protection temperature for a selected period.

At the end of the holiday, the thermostat automatically returns to its normal programmed operation.

Important: If the thermostat is operating in Cool-only mode, Holiday Mode places it into standby. Frost protection is not available in that condition.

How to Activate Holiday Mode

1. Highlight HOLIDAY using Left or Right.
2. Press Tick.
3. Use Up and Down to select the year in which the holiday will end.
4. Press Tick.
5. Use Up and Down to select the month.
6. Press Tick.
7. Repeat the procedure for the ending date and time.
8. Press Tick to confirm the settings.

Holiday Mode starts immediately.

The thermostat automatically resumes normal programming at the configured ending date and time.

How to Cancel Holiday Mode

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

Ventilation Mode

Ventilation Mode provides fan operation without heating or cooling output.

It is available with all five System Types.

Ventilation operation is manual and does not use a timed ventilation program.

How to Select Ventilation Mode

1. Use Left or Right to highlight MODE.
2. Press Tick.
3. Repeatedly press Tick until VENT is selected.

How to Change Fan Speed in Ventilation Mode

1. Highlight FAN.
2. Repeatedly press Tick to select the required fan setting.

The available settings are:

• Low
• Medium
• High
• Off

Automatic fan speed is not used in Ventilation Mode.

Advanced Settings and Feature Menu

The neoStat-HC1 includes 14 configurable features for thermostat operation, fan control, temperature regulation, and system configuration.

These settings are primarily used during initial setup or when a change to the installed system is required.

How to Open the Feature Menu

1. Use Left and Right to highlight the Power symbol.
2. Press and hold Tick for 3 seconds.
3. SETUP will be highlighted.
4. Press Tick once.
5. The feature number and setting value appear.
6. Use Up and Down to move through the features.
7. Use Left and Right to change the selected value.
8. Press Tick to confirm and exit.

Advanced Feature Settings Table

Feature 01: neoHub Pairing

Feature 01 is used to connect the thermostat to the Heatmiser neoHub.

The mesh icon flashes during pairing and remains visible after a successful connection.

Feature 02: Switching Differential

Switching Differential determines how far the room temperature can fall below the target temperature before heating begins.

For example, with a target temperature of 20°C:

• A 1°C differential activates heating at 19°C and switches it off at 20°C.
• A 2°C differential activates heating at 18°C and switches it off at 20°C.

The factory default is 1°C.

Feature 03: Frost Protection Temperature

This setting determines the temperature maintained during Frost Protection Mode.

The factory default is 12°C.

Feature 04: Output Delay

Output Delay prevents rapid switching of the thermostat’s output.

The adjustable range is 0–15 minutes.

The default setting is 0 minutes, meaning no delay.

Feature 05: Temperature Adjustment Limit

This feature restricts manual temperature changes made through the Up and Down buttons.

The limit also applies when the thermostat is locked.

The adjustable setting range is 0–10°C, with a default of 0.

Feature 06: Optimum Start

Optimum Start calculates when heating should begin so that the programmed temperature is reached at the required time.

The thermostat uses its observed heating rate to estimate the necessary start time.

The adjustable range is 0–5 hours.

The default is 0.

Feature 07: Rate of Change

Rate of Change represents the number of minutes the thermostat calculates are required to increase the temperature by 1°C.

For example, a calculated value of 20 indicates that the system takes approximately 20 minutes to raise the temperature by 1°C.

This value is used by Optimum Start.

Feature 08: Programming Mode

The available programming settings are:

Feature 09: Temperature Format

Temperature can be displayed in Celsius or Fahrenheit.

• 00: Celsius
• 01: Fahrenheit

Celsius is the factory default.

Feature 10: System Type

Feature 10 selects the installed system configuration.

Feature 11: Deadband

Deadband is used in Auto Mode to maintain separation between heating and cooling temperatures.

It prevents heating and cooling from being requested at conflicting setpoints.

The adjustable range is 2–10°C.

For example, with a heating target of 20°C and a deadband setting of 2°C, the minimum allowed cooling target is 23°C.

If the cooling target is changed to 22°C, the thermostat moves the heating target to 19°C.

Feature 12: Constant Fan

Constant Fan determines whether the fan continues operating after heating or cooling demand ends.

When enabled:

• Fan speed is adjusted between Low, Medium, and High while heating or cooling is required.
• After demand ends, the fan continues operating at Low speed.

When disabled, fan operation stops when the heating or cooling demand ends.

The manual notes that this feature is disabled during heating when System Type 03 is selected.

Feature 13: Cool Air Proof

Cool Air Proof delays the fan when heating begins.

The valve opens for the configured period before the fan starts, reducing the likelihood of cold air being circulated during the start of heating.

Available settings are:

Feature 14: Valve Cycling

Valve Cycling periodically operates valves that have remained inactive.

When enabled, each affected valve is operated for five minutes according to the selected interval.

The operation is randomized to avoid simultaneous demand across the system.

Recalibrating the Thermostat

The neoStat-HC1 provides a temperature recalibration procedure.

Warning: Incorrect recalibration may cause the thermostat to operate improperly. IMI Heatmiser instructs users to contact its technical support team before performing this procedure.

Temperature Recalibration Procedure

1. Use Left and Right to highlight the Power symbol.
2. Press and hold Tick to turn off the display.
3. Press and hold Tick and Down together for 10 seconds.
4. The current temperature appears.
5. Use Up and Down to select the new temperature value.
6. Press Tick to confirm.
7. The display goes blank.
8. Use Down to highlight the Power symbol.
9. Press Tick to turn the thermostat back on.

The procedure should only be carried out after obtaining the manufacturer’s guidance.

Error Codes and Troubleshooting

The neoStat-HC1 displays an error code when it detects a temperature sensor fault.

Error Code E0

E0 indicates that the thermostat’s internal temperature sensor has developed a fault.

The manufacturer should be contacted for technical assistance.

Common Operating Indicators and Checks

neoStat-HC1 Wiring Diagrams

The neoStat-HC1 wiring diagrams illustrate the 230V AC supply, 0–10V fan connection, and switched valve outputs.

The correct diagram must be selected according to the configured System Type and installed valve arrangement.

The product must only be installed by a qualified electrician in accordance with local installation regulations.

Wiring Terminal Identification

The wiring diagrams show the following terminal labels:

The exact function of V1 and V2 depends on the selected System Type.

Normally Closed Valve Wiring — System Types 01 and 02

The normally closed valve diagram shows:

• 230V AC mains supply
• 0–10V controlled fan
• Normally closed valve
• Thermostat terminal connections

Original manual reference: PDF page 30 (printed manual page 29).

Normally Open Valve Wiring — System Types 01 and 02

This diagram shows the connection arrangement for a normally open valve and a 0–10V fan.

Original manual reference: PDF page 31 (printed manual page 30).

Three-Wire Valve Connection — System Types 01 and 02

The three-wire valve diagram identifies separate valve opening and closing connections alongside the 0–10V fan connection.

Original manual reference: PDF page 32 (printed manual page 31).

Fan Coil and Wet System Wiring — System Types 03 and 05

This diagram illustrates heating and cooling valve connections with a 0–10V controlled fan.

The diagram includes a heating connection with no fan output. The System Type descriptions provide additional information about the heating stages and fan behavior.

Original manual reference: PDF page 33 (printed manual page 32).

Separate Heating and Cooling Valve Wiring — System Type 04

The four-pipe wiring diagram shows:

• Separate heating and cooling valves
• 0–10V fan control
• 230V AC supply
• Two-port motorized valves

Original manual reference: PDF page 34 (printed manual page 33).

The manufacturer’s original diagrams must be followed for exact terminal positions and electrical connections.

Factory Reset Instructions

A factory reset returns the neoStat-HC1 to its default configuration.

Important: Factory reset cancels parameters entered during setup and pairing. These procedures must be repeated after the reset.

How to Factory Reset the neoStat-HC1

1. Use Left and Right to highlight the Power symbol.
2. Press and hold Tick until the display turns off.
3. SETUP will be highlighted.
4. Press and hold Tick for 10 seconds.
5. All LCD icons appear for approximately two seconds.
6. The Setup entry screen appears.
7. Use Down to highlight the Power symbol.
8. Press Tick.

The thermostat returns to the main display.

The required system settings and neoHub pairing must be configured again after the reset.

Customer Support and Manufacturer Information

IMI Heatmiser provides technical support and product information through its official contact channels.

The official website provides further product information and technical specifications.

Radio Compliance Information

Heatmiser UK Ltd declares compliance with Directive 2014/53/EU.

The manual lists the following radio information:

The manufacturer also provides a QR code for the neoStat family Statement of Compliance, including the security update support period.

Frequently Asked Questions

1. What is the difference between the neoStat-HC1 and neoStat-HC fan outputs?

The neoStat-HC1 uses GND and AO terminals for 0–10V fan control. The neoStat-HC model uses separate Hf, Mf, and Lf fan speed output terminals.

The wiring arrangement must match the exact thermostat model and the connected fan equipment.

2. How is the Heatmiser neoStat-HC1 connected to the neoHub?

The neoHub must first be connected to the router and registered through the neoApp.

The thermostat is added as a zone using Feature 01 in the SETUP menu. The mesh icon flashes during pairing and remains displayed when the connection is established.

3. How is the neoStat-HC1 factory reset?

Highlight the Power symbol and hold Tick to switch off the display. When SETUP appears, hold Tick for 10 seconds until the LCD icons appear.

After the Setup screen returns, highlight the Power symbol and press Tick.

The reset cancels setup and pairing parameters.

4. How is the neoStat-HC1 keypad unlocked?

Press Tick once and enter the previously configured four-digit PIN.

Use Up and Down to enter each group of two digits, confirming each group with Tick.

The keypad unlocks after the correct PIN is entered.

5. What does error E0 mean on the neoStat-HC1?

E0 indicates that the thermostat’s internal temperature sensor has developed a fault.

IMI Heatmiser technical support should be contacted for assistance.

6. Does the neoStat-HC1 support automatic fan control?

Yes. Automatic fan control is supported in applicable operating modes and System Types.

The thermostat selects Low, Medium, or High fan speed according to the difference between the measured room temperature and the target temperature.

7. Can the neoStat-HC1 control both heating and cooling?

Yes. The neoStat-HC1 supports heating and cooling control with selectable System Types.

Auto Mode is available for compatible system configurations, allowing both heating and cooling setpoints to be used.

8. What is the default frost protection temperature on the neoStat-HC1?

The default frost protection temperature is 12°C.

The temperature can be changed through Feature 03 in the thermostat’s advanced settings.