Thermiq actuator M28
3 F820 51
3 F820 51
Thermal Actuator for underfloor systems,
Connection M28x1,5,
Normally closed (NC),
Main supply 230V.
Connection M28x1,5,
Normally closed (NC),
Main supply 230V.
| IDENT | EAN | POWER SUPPLY | M | L [MM] | H [MM] |
| 3 F820 51 | 3838963245001 | 230 V AC, 50 Hz | 28X1,5 | 65 | 41 |
The HERZ Thermiq system offers flexible communication options, allowing connection through three different versions, depending on the product type:
• Wired
• Wi-Fi
• Zigbee
Each version ensures reliable data exchange between room controllers, actuators, and the central control unit, while maintaining compatibility across the HERZ Thermiq ecosystem.
The thermoelectric actuator is designed for precise control of underfloor heating circuits. It operates by opening or closing the flow of the heating medium through the corresponding valve, thus regulating the temperature in individual zones or rooms.
The actuator is compatible with thermostatic valves installed on underfloor heating manifolds or with dedicated zone valves. It can be controlled directly by a room thermostat or indirectly via a control unit (wiring center).
Featuring silent and maintenance-free operation, the actuator ensures reliable performance and optimized energy efficiency. Its compact design allows easy installation even in confined spaces, while the high-quality materials guarantee long service life and consistent operating characteristics.
Product highlights
• Designed for precise on/off control of underfloor heating circuits
• Compatible with thermostatic valves on manifolds or with zone valves
• Operates directly with room thermostats or via control unit (wiring center)
• Ensures silent, maintenance-free, and energy-efficient operation
• Compact design allows quick and easy installation in limited spaces
• Durable construction guarantees long service life and reliable performance
• Wired
• Wi-Fi
• Zigbee
Each version ensures reliable data exchange between room controllers, actuators, and the central control unit, while maintaining compatibility across the HERZ Thermiq ecosystem.
The thermoelectric actuator is designed for precise control of underfloor heating circuits. It operates by opening or closing the flow of the heating medium through the corresponding valve, thus regulating the temperature in individual zones or rooms.
The actuator is compatible with thermostatic valves installed on underfloor heating manifolds or with dedicated zone valves. It can be controlled directly by a room thermostat or indirectly via a control unit (wiring center).
Featuring silent and maintenance-free operation, the actuator ensures reliable performance and optimized energy efficiency. Its compact design allows easy installation even in confined spaces, while the high-quality materials guarantee long service life and consistent operating characteristics.
Product highlights
• Designed for precise on/off control of underfloor heating circuits
• Compatible with thermostatic valves on manifolds or with zone valves
• Operates directly with room thermostats or via control unit (wiring center)
• Ensures silent, maintenance-free, and energy-efficient operation
• Compact design allows quick and easy installation in limited spaces
• Durable construction guarantees long service life and reliable performance
EG-Conformity
By affixing the CE mark to the unit the manufacturer declares that the HERZ Thermiq conforms to the following relevant safety regulations:
• EU low voltage directive 2014/35/EU
• EU electromagnetic compatibility directive 2014/30/EU
• EU RoHS Directive 2011/65/EU
• EU WEEE Directive 2012/19/EU (Reg.nr. DE 23479719)
Conformity has been verified and the corresponding documentation and the EU declaration of conformity are kept on file by the manufacturer.
Declaration of conformity - SLO, ENG, DEU
By affixing the CE mark to the unit the manufacturer declares that the HERZ Thermiq conforms to the following relevant safety regulations:
• EU low voltage directive 2014/35/EU
• EU electromagnetic compatibility directive 2014/30/EU
• EU RoHS Directive 2011/65/EU
• EU WEEE Directive 2012/19/EU (Reg.nr. DE 23479719)
Conformity has been verified and the corresponding documentation and the EU declaration of conformity are kept on file by the manufacturer.
Declaration of conformity - SLO, ENG, DEU
| Parameter |
Value |
Version |
NC = Normally Closed |
Thread size |
M30 x 1,5 mm |
Power supply |
230V AC |
Power consumption |
2W |
Max. Inrush current |
300mA / 200ms |
Closing force |
100 N +/- 15% |
Max. stroke |
4.5 mm |
Storage temp. |
From -25°C to +60°C |
Ambient temp. |
Max. 60°C |
Protection class |
IP 54/II |
Cable length |
90 cm |
Actuator description
1. Stroke indicator
2. Installation pin
3. Actuator body
4. Connection nut
Safety information and installation
Use in accordance with national and EU regulations. Use the device only as intended, keeping it in a dry condition. The product is for indoor use only. Please read the entire manual, before installation or use. Installation must be performed by a qualified person with appropriate electrical qualifications, in accordance with the standards and regulations in force in a given country and in the EU. The manufacturer is not responsible for noncompliance with the instructions.
For the entire installation, there may be additional protection requirements, which the installer is responsible for.
Installation
1. Place the actuator vertically on the valve body and
align the threaded connection.
2. Hand-tighten the connection nut by turning it
clockwise until the actuator is securely fixed to the
valve. Ensure that the valve is correctly mounted on the
manifold.
3. Remove the white Installation pin.
4. Check that the actuator is properly seated — the
position indicator should move downward when the
installation pin is removed in step 3
Use in accordance with national and EU regulations. Use the device only as intended, keeping it in a dry condition. The product is for indoor use only. Please read the entire manual, before installation or use. Installation must be performed by a qualified person with appropriate electrical qualifications, in accordance with the standards and regulations in force in a given country and in the EU. The manufacturer is not responsible for noncompliance with the instructions.
For the entire installation, there may be additional protection requirements, which the installer is responsible for.
Installation
1. Place the actuator vertically on the valve body and
align the threaded connection.
2. Hand-tighten the connection nut by turning it
clockwise until the actuator is securely fixed to the
valve. Ensure that the valve is correctly mounted on the
manifold.
3. Remove the white Installation pin.
4. Check that the actuator is properly seated — the
position indicator should move downward when the
installation pin is removed in step 3
