Helios easyControls 3.0

Modbus RTU

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Last updated: 03. 2026

The Helios easyControls 3.0 is a building control system interface for Helios KWL ventilation units with heat recovery. It communicates with TapHome via Modbus RTU over RS-485, providing access to CO2 and humidity sensor readings, fan speed monitoring and configuration, ventilation mode switching (Home, Away, Boost, Fireplace), and timer management.

The system uses holding registers in the range H:4353 to H:21772. Temperature values are transmitted in centiKelvin (cK), where 0 degrees C equals 27315 cK.

Hardware connection

RS-485 wiring

The Helios KWL unit exposes an RS-485 Modbus RTU interface on its PCB terminal block. Multiple units can be daisy-chained on the same bus with a 120 ohm termination resistor on the last unit.

Connect using a 3-wire RS-485 connection to the KWL unit’s terminal block:

MB_A (Data+) to A+/D+ on TapHome RS-485
MB_B (Data-) to B-/D- on TapHome RS-485
GND to GND on TapHome power supply

The last unit on the bus requires a 120 ohm termination resistor between MB_A and MB_B.

Important – Grounding
The GND wire must be connected between the Helios unit and the TapHome power supply. Without proper grounding, communication errors may occur.

Configuration

Enabling Modbus communication

The Modbus RTU default settings can be changed via the KWL-BE Touch panel or via the unit’s internal web server.

Helios easyControls 3.0 Modbus settings screen showing address, baud rate, parity and stop bit configuration

Default Modbus parameters:

Parameter	Default value
Address	1
Baud rate	19200
Parity	Even
Stop bit	1

Configure TapHome to match: Set the RS-485 bus to 19200 baud, even parity, 1 stop bit. Use Slave ID 1 (or the address configured on the unit).

Profile priority

If more than one profile is active simultaneously, the profile with higher priority overrides the lower-priority profile. The priority order (highest to lowest) is:

Timer configurable input (assigned to digital inputs)
Fireplace function
Boost ventilation
Home/Away

For example, if both the fireplace function and boost ventilation profiles are active at the same time, the fireplace function overrides the boost ventilation due to its higher priority.

Device capabilities

CO2 monitoring

CO2 Value (H:4364) reads the highest CO2 measurement across all connected CO2 sensors in PPM. If no CO2 sensor is connected, the value reads 0 and a warning is generated in TapHome.

The device exposes seven service attributes:

CO2 Sensor 0 through CO2 Sensor 5 (H:4379 to H:4384) – individual sensor readings in PPM. A value of 65535 indicates no sensor connected at that position.
CO2 Threshold (H:20491) – the current CO2 control threshold (range 500 to 2000 PPM).

A service action CO2 Threshold allows setting the CO2 threshold value for automatic ventilation adjustment.

Fan speed monitoring and profiles

Fan Speed (H:4353) displays the current fan speed as a percentage (0 to 100%). This represents the actual running speed of the ventilation unit.

Service attributes expose the configured fan speeds for each profile:

Away Fan Speed (H:20501) – fan speed in Away profile
Home Fan Speed (H:20507) – fan speed in Home profile
Boost Fan Speed (H:20513) – fan speed in Boost profile
Boost Air Target Temperature (H:20514) – supply air target temperature in Boost profile (centiKelvin to degrees C conversion)
Boost CO2 Control and Boost RH Control (H:20512, H:20511) – enable/disable CO2 and humidity-based automatic adjustment in Boost mode

Two service actions allow configuring fan parameters:

Fan Speed Setup – sets fan speed percentages for Home, Away and Boost profiles simultaneously
Boost Set Up – configures the Boost profile including fan speed, supply air target temperature, and CO2/RH control toggles

Internal sensor (temperature and humidity)

Internal Sensor (H:4369/H:4370) reads temperature and relative humidity from the built-in multisensor. The temperature uses 12-bit internal encoding and the humidity is divided by 100 to get the percentage value.

This device exposes extensive service attributes for monitoring the ventilation system:

Air temperatures (all in centiKelvin, converted to degrees C):

Extract Air Temperature (H:4354) – air entering the heat recovery cell from indoors
Exhaust Air Temperature (H:4355) – air leaving the heat recovery cell to outdoors
Outdoor Air Temperature (H:4356) – fresh air entering the unit from outside
Supply Air Temperature (H:4358) – conditioned air delivered to rooms after the heater

Humidity sensors:

RH Sensor 0 through RH Sensor 5 (H:4373 to H:4378) – individual relative humidity readings in percent. A value of 65535 indicates no sensor connected.
RH Basic Level (H:20490) – the calculated or manually set RH basic level (65535 if not yet calculated)
RH Level Mode (H:20543) – 0 for Automatic Level Update, 1 for Manual

System status:

Cell State (H:4616) – heat recovery cell operation: 0 = Heat Recovery, 1 = Cool Recovery, 2 = Bypass, 3 = Defrosting
Filter Change Date (H:20546 to H:20548) – last filter change date (day, month, year)
Filter Change Interval (H:20537) – interval in days for the filter change indicator (30 to 365)

Service actions on the Internal Sensor device:

Filter Change Date – records a new filter change date
RH Basic Level – sets the humidity reference level (0 to 100%)
RH Level Mode – selects automatic or manual humidity level control

Ventilation mode control

Mode (H:4609) is a multi-value switch controlling the ventilation profile with four states:

Value	Mode	Description
0	Home	Normal ventilation with home profile settings
1	Away	Reduced ventilation for unoccupied periods
2	Boost	Intensive ventilation (timer-based via H:21766)
3	Fireplace	Positive-pressure mode for homes with a fireplace (timer-based via H:21767)

The Mode device exposes twelve service attributes showing per-profile configuration:

Away settings: fan speed, supply air target, RH control, CO2 control
Home settings: fan speed, supply air target, RH control, CO2 control
Fireplace fan speeds: separate extract and supply fan speed percentages
Weekly Timer state (enabled/disabled) and WeekDay (1 = Monday through 7 = Sunday)

Five service actions allow full profile configuration:

Away Set Up / Home Set Up – configures fan speed, supply air target temperature, RH and CO2 control for each profile
Fan Speed Set Up – sets Home, Away, and Boost fan speed percentages simultaneously
Fireplace Set Up – configures extract and supply fan speeds for fireplace mode
Weekly Timer – enables or disables the weekly timer program

Module-level service diagnostics

The module exposes nine service attributes for system monitoring:

Date and Time – current unit clock (day, month, year, hours, minutes)
Fireplace Timer and Fireplace Time – fireplace mode timer state and duration in minutes
Boost Timer and Boost Time – boost ventilation timer state and duration in minutes
Extra Timer – configurable digital input timer state
Weekly Timer – weekly program state (enabled/disabled)
Filter Change Date – last filter change date

Four module-level service actions:

Set Date and Time – sets the unit clock (year, month, day, hour, minute)
Timers Control – toggles boost, fireplace, and extra timers on/off
Timers Set Up – configures boost and fireplace timer durations (1 to 1440 minutes)
Filter Change – records a filter change date

Additional capabilities

The Helios easyControls 3.0 also exposes registers for four individual air temperatures (outdoor, extract, exhaust, supply) as standalone sensor devices, a separate RH aggregate value, an optional external temperature sensor (H:4389), and boost/fireplace timer remaining time counters. These are currently available as service attributes on the Internal Sensor and Mode devices. They can be added as standalone TapHome devices in a future template update.

The four air temperature sensors (outdoor, extract, exhaust, supply) are accessible as service attributes on the Internal Sensor device. If standalone temperature devices are needed, they can be added as custom Modbus devices in TapHome using the corresponding register addresses with centiKelvin-to-Celsius conversion (subtract 27315, divide by 100).

Troubleshooting

No Modbus communication

Check RS-485 cables:
- MB_A correctly connected to A+/D+ on TapHome
- MB_B correctly connected to B-/D- on TapHome
- GND connected to TapHome power supply ground – most common issue
Verify the Modbus Slave address matches the unit configuration (default: 1)
Check the 120 ohm termination resistor on the last unit
Confirm TapHome is set to: 19200 baud, even parity, 1 stop bit
Measure voltage between MB_A and MB_B – should be 1.5 to 5 V at idle

CO2 or RH sensor warnings

If TapHome shows “No CO2 sensor” or “No RH sensor” warnings:

Verify the external CO2/RH sensors are physically connected to the KWL unit
Check individual sensor readings in the service attributes (CO2 Sensor 0 through 5, RH Sensor 0 through 5) – a value of 65535 indicates no sensor at that position
If all sensors show 65535, check the sensor wiring at the KWL terminal block

Temperature readings incorrect

Temperature values are transmitted in centiKelvin. If readings appear as large numbers (e.g., 29315 instead of 20 degrees C):

Verify TapHome is applying the conversion correctly
The correct formula is: Temperature in degrees C = (cK value - 27315) / 100
Valid range for temperature registers is 21000 to 33224 cK (approximately -63 degrees C to +59 degrees C)

easyControls 2.0 compatibility

The easyControls 2.0 system uses a non-standard Modbus TCP/IP protocol with ASCII-encoded variable names. It is not compatible with this template or with standard TapHome Modbus integration. Only easyControls 3.0 units with Modbus RTU support can use this template.

Available devices

Helios easyControls 3.0 Module

Service Attributes

Date
Time
Fireplace Timer
Fireplace Time	Fireplace timer duration in minutes
Boost Timer
Boost Time	Boost ventilation timer duration in minutes
Extra Timer	Configurable digital input timer state
Weekly Timer
Filter Change Date

Service Actions

Set Date and Time
Timers Control	Toggles boost, fireplace and extra timers on or off
Timers Set Up	Configures boost and fireplace timer durations (1 to 1440 minutes)
Filter Change	Records the date of a filter replacement

Helios

Service Attributes

Date

ModbusR(H, 4851, Uint16) 
+ "." + ModbusR(H, 4852, Uint16) 
+ " 20" + ModbusR(H, 4853, Uint16)

Time

var min := ModbusR(H, 4849, Uint16);

ModbusR(H, 4850, Uint16) + ":" + IF(min < 10, "0", "") + min

Fireplace Timer

IF(MODBUSR(H, 21767, Uint16) > 0, "ON", "OFF")

Fireplace Time

MODBUSR(H, 20545, Uint16) + " min";

Boost Timer

IF(MODBUSR(H, 21766, Uint16) > 0, "ON", "OFF")

Boost Time

MODBUSR(H, 20544, Uint16) + " min";

Extra Timer

IF(MODBUSR(H, 21772, Uint16) > 0, "ON", "OFF")

Weekly Timer

IF(MODBUSR(H, 4615, Uint16) > 0, "Enabled", "Disabled")

Filter Change Date

ModbusR(H, 20546, Uint16) 
+ "." + ModbusR(H, 20547, Uint16) 
+ " 20" + ModbusR(H, 20548, Uint16)

Service Actions

Set Date and Time

Parameters: Year 20__ (1–99 Y), Month (1–12 Mo), Day (1–31 Da), Hours (0–23 Ho), Minutes (0–59 Min)

ModbusW(H, 4849, Uint16, Min);
ModbusW(H, 4850, Uint16, Ho);
ModbusW(H, 4851, Uint16, Da);
ModbusW(H, 4852, Uint16, Mo);
ModbusW(H, 4853, Uint16, Y);

Timers Control

Parameters: Boost Timer (On / Off), Fireplace Timer (On / Off), Extra Timer (On / Off)

ModbusWNE(H, 21766, Uint16, bt);
ModbusWNE(H, 21767, Uint16, ft);
ModbusWNE(H, 21772, Uint16, et);

Timers Set Up

Parameters: Boost Time (1–1440 btt), Fireplace Time (1–1440 ftt)

MODBUSWNE(H, 20544, Uint16, btt);
MODBUSWNE(H, 20545, Uint16, ftt);

Filter Change

Parameters: Day (1–31 Da), Month (1–12 Mo), Year (1–99 Y)

ModbusW(H, 20546, Uint16, Da);
ModbusW(H, 20547, Uint16, Mo);
ModbusW(H, 20548, Uint16, Y);

CO2 Value Dimmer Read-only

Highest CO2 measurement across all connected sensors in PPM — warns if no sensor is connected

Service Attributes

CO2 Sensor 0
CO2 Sensor 1
CO2 Sensor 2
CO2 Sensor 3
CO2 Sensor 4
CO2 Sensor 5
CO2 Threshold	CO2 control threshold for automatic ventilation adjustment (500 to 2000 PPM)

Service Actions

CO2 Threshold

Sets the CO2 threshold for automatic ventilation control

CO2 Value

Read (module)

IF(MODBUSR(H, 4364, Uint16)=0, ADDWARNING("No CO2 sensor"));

Read level

MODBUSR(H, 4364, Uint16) / 1000000

Service Attributes

CO2 Sensor 0

var press := MODBUSR(H, 4379, Uint16);
IF(press=65535, "No sensor", press/1000000);

CO2 Sensor 1

var press := MODBUSR(H, 4380, Uint16);
IF(press=65535, "No sensor", press/1000000);

CO2 Sensor 2

var press := MODBUSR(H, 4381, Uint16);
IF(press=65535, "No sensor", press/1000000);

CO2 Sensor 3

var press := MODBUSR(H, 4382, Uint16);
IF(press=65535, "No sensor", press/1000000);

CO2 Sensor 4

var press := MODBUSR(H, 4383, Uint16);
IF(press=65535, "No sensor", press/1000000);

CO2 Sensor 5

var press := MODBUSR(H, 4384, Uint16);
IF(press=65535, "No sensor", press/1000000);

Co2 Threshold

MODBUSR(H, 20491, Uint16) + " PPM"

Service Actions

CO2 Threshold

Parameters: Threshold (500–2000 co)

MODBUSW(H, 20491, Uint16, (co))

Fan Speed Dimmer Read-only

Current ventilation fan speed as percentage (0 to 100%)

Service Attributes

Away Fan Speed
Home Fan Speed
Boost Fan Speed
Boost Air Target Temperature	Supply air target temperature in Boost profile
Boost CO2 Control
Boost RH Control

Service Actions

Boost Set Up	Configures Boost profile — fan speed, supply air target, RH and CO2 control
Fan Speed Setup	Sets fan speed percentages for Home, Away and Boost profiles

Fan Speed

Read level

MODBUSR(H, 4353, Int16) / 100

Service Attributes

Away Fan Speed

MODBUSR(H, 20501, Uint16) + "%";

Home Fan Speed

MODBUSR(H, 20507, Uint16) + "%";

Boost Fan Speed

MODBUSR(H, 20513, Uint16) + "%";

Boost Air Target Temperature

(MODBUSR(H, 20514, UInt16) - 27315)/100 + "°C"

Boost CO2 Control

IF(MODBUSR(H, 20512, Uint16) > 0, "Enabled", "Disabled")

Boost RH Control

IF(MODBUSR(H, 20511, Uint16) > 0, "Enabled", "Disabled")

Service Actions

Boost Set Up

Parameters: Fan Speed [%] (1–100 fsb), Supply Air [5-25°C] (5–25 sab), RH Control (Enabled / Disabled), CO2 Control (Enabled / Disabled)

MODBUSWNE(H, 20511,Uint16,rhb);
MODBUSWNE(H, 20512, Uint16, cob);
MODBUSWNE(H,20513, Uint16, fsb);
MODBUSWNE(H, 20514, UInt16, (sab*100) + 27315);

Fan Speed Setup

Parameters: Home (0–100 ho), Away (0–100 aw), Boost (0–100 bo)

MODBUSW(H, 20501, Uint16, aw);
MODBUSW(H, 20507, Uint16, ho);
MODBUSW(H, 20513, Uint16, bo);

Internal Sensor Temperature Sensor Read-only

Built-in temperature and humidity multisensor with air quality monitoring, filter status and heat recovery cell state

Service Attributes

Filter Change Date
Filter Change Interval	Days between filter change reminders (30 to 365)
Cell State	Heat recovery cell operation — Heat Recovery, Cool Recovery, Bypass, or Defrosting
Exhaust Air Temperature	Air leaving the heat recovery cell to outdoors
Extract Air Temperature	Air entering the heat recovery cell from indoors
Outdoor Air Temperature	Fresh air entering the unit from outside
Supply Air Temperature	Conditioned air delivered to rooms after the heater
RH Sensor 0
RH Sensor 1
RH Sensor 2
RH Sensor 3
RH Sensor 4
RH Sensor 5
RH Basic Level	Humidity reference level for automatic ventilation control
RH Level Mode	Automatic or manual humidity level control

Service Actions

Filter Change Date	Records the date of a filter replacement
RH Basic Level	Sets the humidity reference level (0 to 100%)
RH Level Mode

Internal Sensor

Read humidity

MODBUSR(H, 4370, Int16) / 100

Read (module)

IF(MODBUSR(H, 4363, Uint16)=0, ADDWARNING("No RH sensor"));

Read temperature

MODBUSR(H, 4369, Int16)

Service Attributes

Filter Change Date

MODBUSR(H, 20546, Uint16) + "." + MODBUSR(H, 20547, Uint16) + ".20" + MODBUSR(H, 20548, Uint16)

Filter Change Interval

MODBUSR(H, 20537, Uint16) + " days";

Cell State

SWITCH(MODBUSR(H, 4616, Uint16), 0, "Heat Recovery", 1, "Cool Recovery", 2, "Bypass", 3, "Defrosting", "Unknown")

Exhaust Air Temperature

(MODBUSR(H, 4355, UInt16) - 27315)/100 + " °C"

Extract Air Temperature

(MODBUSR(H, 4354, UInt16) - 27315)/100 + " °C"

Outdoor Air Temperature

(MODBUSR(H, 4356, UInt16) - 27315)/100 + " °C"

Supply Air Temperature

(MODBUSR(H, 4358, UInt16) - 27315)/100 + " °C"

RH Sensor 0

var temp := MODBUSR(H, 4373, Uint16);
IF(temp=65535, "No sensor", temp);

RH Sensor 1

var temp := MODBUSR(H, 4374, Uint16);
IF(temp=65535, "No sensor", temp);

RH Sensor 2

var temp := MODBUSR(H, 4375, Uint16);
IF(temp=65535, "No sensor", temp);

RH Sensor 3

var temp := MODBUSR(H, 4376, Uint16);
IF(temp=65535, "No sensor", temp);

RH Sensor 4

var temp := MODBUSR(H, 4377, Uint16);
IF(temp=65535, "No sensor", temp);

RH Sensor 5

var temp := MODBUSR(H, 4378, Uint16);
IF(temp=65535, "No sensor", temp);

RH Basic Level

var rh := MODBUSR(H, 20490, Uint16);
IF(rh = 65535, "Not Calculated", rh + "%")

RH Level Mode

IF(MODBUSR(H, 20543, Uint16) > 0, "Manual", "Automatic Level Update");

Service Actions

Filter Change Date

Parameters: Day (1–31 day), Month (1–12 mon), Year (2000–2099 ye)

MODBUSWNE(H, 20546, Uint16, day);
MODBUSWNE(H, 20547, Uint16, mon);
MODBUSWNE(H, 20548, Uint16, ye);

RH Basic Level

Parameters: Basic Level [%] (0–100 bl)

MODBUSW(H, 20490, Uint16, bl);

RH Level Mode

Parameters: Mode (Manual / Automatic Level Update)

MODBUSW(H, 20543, Uint16, mo);

Mode Multi-value Switch

Ventilation profile selector — Home, Away, Boost, or Fireplace mode with per-profile fan speed and air quality settings

Values / States: Home · Away · Boost · Fireplace

Service Actions

Weekly Timer	Enables or disables the weekly timer program
Away Set Up	Configures Away profile — fan speed, supply air target, RH and CO2 control
Home Set Up	Configures Home profile — fan speed, supply air target, RH and CO2 control
Fan Speed Set Up	Sets fan speed percentages for Home, Away and Boost profiles
Fireplace Set Up	Configures extract and supply fan speeds for Fireplace mode

Mode

Read switch state

if(MODBUSR(H, 4609, Uint16) = 1, return(1));
if(MODBUSR(H, 21767, Uint16) = 1, return(3));
if(MODBUSR(H, 21772, Uint16) = 1, return(2));
return(0);

Write switch state

IF Mu = 0
MODBUSWNE(H, 21767, Uint16, 0);
MODBUSWNE(H, 21772, Uint16, 0);
MODBUSWNE(H, 4609, Uint16, 0);
END
IF Mu = 1
MODBUSWNE(H, 21767, Uint16, 0);
MODBUSWNE(H, 21772, Uint16, 0);
MODBUSWNE(H, 4609, Uint16, 1);
END
IF Mu = 2
MODBUSWNE(H, 21767, Uint16, 0);
MODBUSWNE(H, 21772, Uint16, 1);
MODBUSWNE(H, 4609, Uint16, 0);
END
IF Mu = 3
MODBUSWNE(H, 21767, Uint16, 1);
MODBUSWNE(H, 21772, Uint16, 0);
MODBUSWNE(H, 4609, Uint16, 0);
END

Service Attributes

WeekDay

SWITCH(MODBUSR(H, 4854, Uint16), 1,"Monday",2,"Tuesday",3,"Wednesday",4,"Thursday",5,"Friday",6,"Saturday",7,"Sunday","Unknown")

Weekly Timer

IF(MODBUSR(H, 4615, Uint16) = 1, "ON", "OFF")

Away Fan Speed

MODBUSR(H, 20501, Uint16) + "%"

Away Supply Air

(MODBUSR(H, 20502, UInt16) - 27315)/100 + "°C"

Away RH Control

IF(MODBUSR(H, 20499, Uint16) > 0, "Enabled", "Disabled")

Away CO2 Control

IF(MODBUSR(H, 20500, Uint16) > 0, "Enabled", "Disabled")

Home Fan Speed

MODBUSR(H, 20507, Uint16) + "%"

Home Supply Air

(MODBUSR(H, 20508, UInt16) - 27315)/100 + "°C"

Home RH Control

IF(MODBUSR(H, 20505, Uint16) > 0, "Enabled", "Disabled")

Home CO2 Control

IF(MODBUSR(H, 20506, Uint16) > 0, "Enabled", "Disabled")

Fireplace Extract Fan Speed

MODBUSR(H, 20487, Uint16) + " %"

Fireplace Supply Fan Speed

MODBUSR(H, 20487, Uint16) + " %"

Service Actions

Weekly Timer

Parameters: Tmer (ON / OFF)

MODBUSWNE(H, 4615, Uint16, tim);

Away Set Up

Parameters: Fan Speed [%] (0–100 fsa), Supply Air [5-25°C] (5–25 sata), RH Control (Enabled / Disabled), CO2 Control (Disabled / Enabled)

MODBUSWNE(H, 20499,Uint16,rha);
MODBUSWNE(H, 20500, Uint16, coa);
MODBUSWNE(H,20501, Uint16, fsa);
MODBUSWNE(H, 20502, UInt16, (sata*100) + 27315);

Home Set Up

Parameters: Fan Speed[%] (0–100 fsh), Supply Air [5-25°C] (5–25 sath), RH Control (Enabled / Disabled), CO2 Control (Enabled / Disabled)

MODBUSWNE(H, 20505,Uint16,rhh);
MODBUSWNE(H, 20506, Uint16, coh);
MODBUSWNE(H,20507, Uint16, fsh);
MODBUSWNE(H, 20508, UInt16, (sath*100) + 27315);

Fan Speed Set Up

Parameters: Home [%] (0–100 ho), Away [%] (0–100 aw), Boost [%] (0–100 bo)

MODBUSW(H, 20501, Uint16, aw);
MODBUSW(H, 20507, Uint16, ho);
MODBUSW(H, 20513, Uint16, bo);

Fireplace Set Up

Parameters: Exctract Speed [%] (0–100 ex), Supply Speed [%] (0–100 sup)

MODBUSW(H, 20487, Uint16, ex);
MODBUSW(H, 20488, Uint16, sup);

Connection: Modbus RTU • 19200 baud• 8E1 • Slave ID: $[SlaveId]

Possible improvements (8)

H:4356 Outdoor Air Temperature (as device) — TEMP_OUTDOOR_AIR — exposed only as service attribute on Internal Sensor, not as standalone temperature device
H:4354 Extract Air Temperature (as device) — TEMP_EXTRACT_AIR — exposed only as service attribute on Internal Sensor, not as standalone temperature device
H:4355 Exhaust Air Temperature (as device) — TEMP_EXHAUST_AIR — exposed only as service attribute on Internal Sensor, not as standalone temperature device
H:4358 Supply Air Temperature (as device) — TEMP_SUPPLY_AIR — exposed only as service attribute on Internal Sensor, not as standalone temperature device
H:4363 RH Value (as device) — RH_VALUE — highest RH measurement across sensors. Only used for warning check in readscript, not as standalone humidity device
H:4389 Optional External Temperature Sensor — TEMP_OPTIONAL in centiKelvin — not used in template
H:4612 Boost Timer Remaining Time — Remaining minutes for boost ventilation timer (65535=duration active). Not exposed as sensor device
H:4613 Fireplace Timer Remaining Time — Remaining minutes for fireplace mode timer (65535=duration active). Not exposed as sensor device

Download Template

Sources

https://www.heliosventilatoren.de/en/products/ventilation-with-heat-recovery/domestic-units-for-wall-ceiling-installation/helios-kwl-r-with-easycontrols-3-0
www.heliosventilatoren.de