220V Non-Programmable Digital Heating Wired Gas Boiler Thermostat with Battery Supply
ST23 is a compact wired 230VAC room thermostat for heating and cooling, used on boilers, water and electric heating, fan coil units and building ventilation. It is non-programmable: the occupant sets a temperature and the stat holds it, with defrost protection at +7 C when the system is off. At 118 x 80 x 26 mm it fits the footprint most replacements need to cover.
Key Benefits
- Single product covers boilers, fan coil units and ventilation control
- 118 x 80 x 26 mm footprint covers the marks left by most older stats
- +7 C defrost temperature protects systems left switched off
- 0.1 C measuring resolution with +/-1 C display accuracy at 20 C
- Heat resistant anti-flammable PC and ABS housing
Problems It Solves
- Replacement stats that leave visible marks on the wall
- Separate part numbers for boiler, fan coil and ventilation duties
- Systems freezing when switched off for a holiday period
- Mechanical stats with no measurable accuracy specification
Who It Is For
- Merchants supplying the 230V replacement market
- Fan coil and ventilation equipment suppliers
- Facility teams standardising a basic room control
- OEM buyers needing a compact CE marked wired stat
Technical Features
- Wired 230VAC operation, non-programmable
- Measuring range 0 C to 40 C in 0.1 C, setpoint range 5 C to 35 C in 0.5 C
- Defrosting temperature +7 C
- Display accuracy +/-1 C at 20 C
- Switchable voltage 24 V AC/DC up to 250 V AC at 50 Hz
- Switchable current 6 A with 2 A inductive load
- Dimensions 118 x 80 x 26 mm, wall mounted
- Anti-flammable PC and ABS housing in white, CE marked
Specifications
| Model | ST23 |
| Programmability | Non-Programmable |
| Power Supply | 230VAC |
| Switchable Voltage | 24 V AC / DC,…250 V AC; 50 Hz |
| Switchable Current | 6 A (2 A inductive load) |
| Temperature Range | 0°C-40°C in 0.1°C |
| Setpoint Range | 5°C-35°C in 0.5°C Defrosting Temperature +7°C |
| Display accuracy | ±1°C (at 20°C) |
| Color | White |
| Material | Anti-flammable PC +ABS |
| Dimension | 118 x 80 x 26 mm |
| Application | Hotel/Household |
| Function | Heating and Cooling Package Carton Box |
| Feature | Heat Resistant |
| Certification | CE |
| Warranty | 1 Year |
| After-sale Service | Online technical support, Return and Replacement |
Specifications are taken from the manufacturer data for this model. Confirm the exact configuration with us before you order.
Application Scenarios
- Hotel and household heating on a wall hung boiler
- Fan coil units in apartments and small offices
- Water and electric heating systems in mixed use buildings
- Industrial and building ventilation systems needing simple temperature control
Quality Control
- High voltage insulation test on every 230VAC unit
- Switching contact exercised at inductive load
- Housing fit and finish inspected at the assembly station
Customisation Options
- Front label and logo printed to the buyer's artwork
- Setpoint range narrowed for hotel and institutional use
- Carton box packing to the buyer's specification
- Instruction sheet in the buyer's language
How It Compares
Installing And Commissioning
Step 1
Isolate the 230V supply and confirm the circuit is dead
Step 2
Mount the backplate at about 1.5 m on an internal wall clear of the heat emitter
Step 3
Land the switched conductors within the 24 V AC/DC to 250 V AC range
Step 4
Set the target temperature and confirm the appliance responds
Step 5
Leave the system in the off position and confirm defrost protection engages near +7 C
220V Non-Programmable Digital Heating Wired Gas Boiler Thermostat with Battery Supply: Buyer Questions
What are the external dimensions of the ST23?
118 x 80 x 26 mm, wall mounted.
Can it be used on a fan coil unit?
Yes. The listed duties include fan coil units, building and industrial ventilation, boilers and water or electric heating systems.
What happens when the system is switched off in winter?
Defrost protection engages at +7 C, so the appliance is called before the system can freeze.
What is the switching capacity?
6 A with 2 A inductive load, across 24 V AC/DC up to 250 V AC at 50 Hz.
Is a CE certificate available?
Yes. The unit is CE marked and we will send the certificate on request.
What is the warranty period?
1 year, with online technical support and a return and replacement process.
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