The Heatmiser TA230 is a reliable, efficient 230V thermal actuator designed for precise control of individual valves on an underfloor heating manifold. When signalled by a room thermostat or wiring centre, the actuator opens or closes the valve, giving accurate temperature management for each room or zone in the system.
Fitted using the integrated M30 x 1.5mm threaded ring nut, the TA230 connects directly onto a manifold and is controlled via an underfloor heating wiring centre such as the Heatmiser UH4 or UH8. Its normally closed (NC) design means the valve stays shut until actively signalled, supporting energy-efficient, fail-safe operation.
230V AC
Power Supply
2 W
Power Consumption
NC
Normally Closed
M30 x 1.5
Valve Connection
IP54
Protection Rating
127 g
Weight
Normally Closed for Fail-Safe Operation
The TA230's normally closed (NC) design means the valve remains shut until the actuator receives a signal to open, helping prevent unwanted heat loss and supporting energy-efficient zone control.
Maximum Cable Length
The TA230 has a maximum cable length of 1 metre between the actuator and its connection point. Plan manifold and wiring centre positioning accordingly during installation.
Qualified Installation Required
This is a mains-voltage (230V AC) actuator. Wiring must be carried out by a qualified electrician or heating engineer in accordance with current UK wiring regulations.
Simple 2-Wire Control
A straightforward 2-wire, normally closed design keeps wiring simple and compatible with standard underfloor heating wiring centres.
Universal M30 Threaded Fitting
The integrated M30 x 1.5mm threaded ring nut fits the vast majority of underfloor heating manifolds without additional adapters.
Fast, Predictable Response
A 3.5mm ± 0.5mm stroke length with defined opening times (120s to start, 180s fully open) gives predictable, repeatable valve control.
IP54 Rated for Manifold Cupboards
Rated IP54 for protection against dust and water splashes, suiting manifold cupboards, plant rooms and similar installation environments.
Low Power Draw
At just 2W power consumption per actuator, multiple TA230 units can run from a wiring centre without excessive electrical load.
Compact & Lightweight
At only 127g, the compact actuator body fits neatly within manifold cabinets without adding bulk.
General
Model
TA230
Product Type
230V Underfloor Heating Manifold Actuator
Valve Connection
M30 x 1.5mm threaded ring nut
Weight
127 g
Electrical
Power Supply
230V AC
Power Consumption
2 W
Wiring
2-wire, Normally Closed (NC)
Maximum Cable Length
1 metre
Performance & Protection
Stroke Length
3.5 mm ± 0.5 mm
Opening Time (Start)
120 seconds
Opening Time (Fully Open)
180 seconds
Degree of Protection
IP54
What does 'normally closed' mean for this actuator?
It means the valve stays shut by default and only opens when the actuator receives a 230V signal from the wiring centre or thermostat, helping prevent unwanted heat loss when a zone isn't calling for heat.
Which wiring centres is the TA230 compatible with?
The TA230 is designed for use with Heatmiser underfloor heating wiring centres such as the UH4 and UH8, as well as similar systems using a standard 230V, 2-wire NC actuator signal.
How is the actuator fitted to the manifold?
It connects using the integrated M30 x 1.5mm threaded ring nut, which is pre-fitted and compatible with the great majority of standard underfloor heating manifolds.
How long does the valve take to open?
The actuator begins moving within 120 seconds of receiving a signal and reaches full stroke within 180 seconds, giving predictable response times for system design.
Can this actuator be used outdoors or in damp areas?
It carries an IP54 rating, offering protection against dust and water splashes, making it suitable for typical manifold cupboards and plant room installations.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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