Steering for water pump TECH ST-21 Buffer (D5)
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DKK883.93
The promotion runs until 24 July 2026
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Description
The controller is designed to control a circulation pump based on temperature measurement from two sensors that are included in the equipment. The regulator is tasked with turning on the pumps if the temperature difference on the sensors exceeds the set value (T2-T1 ≥ Δ), provided that T2 ≥ Minimum pump activation threshold. The pump will be turned off when T2 ≤ T1 or T2 Minimum pump activation threshold – 2°C (constant hysteresis). The pump will also be turned off in the event that T1 reaches the pump shutdown value.
where
- T2 - boiler temperature
- T1 - hot water tank temperature (buffer)
Functions performed by the hot water controller:
- pump control
- anti-stop function
- anti-freeze function
- control of voltage-free output
Hot water pump controller equipment:
- LED display
- two temperature sensors
Switching between the temperature display of the sensors is done by pressing the MINUS button (water temperature in the hot water tank) and PLUS button (water temperature supplying in the boiler). In the controller, after entering the Main Menu, there are functions such as: manual operation, pump activation delta, activation current, shutdown threshold, and factory settings.
Technical data
| Name | Unit | Value |
| Power supply | V | 230V/50Hz +/-10% |
| Power consumption | W | 2 |
| Ambient temperature | °C | 5÷50 |
| Pump output load | A | 1 |
| Temperature measurement range | °C | 0÷90 |
| Measurement accuracy | °C | +/- 1 |
| Temperature resistance of the first sensor | °C | -25÷90 |
| Temperature resistance of the second sensor | °C | -25÷90 |
| Sensor cable length | m | 1,5 |
| Fuse cartridge | A | 1,6 |
Technical data
| Power supply | 230V / 50Hz |
| Max. power consumption | 2 W |
| Ambient temperature | 5÷50 °C |
| Maximum output load | 1 A |
| Accuracy of measurement | +/-1 °C |
| Thermal resistance of the sensors | -25 - 90 °C |
| Fuse-link | 1.6 A |
| Warranty | 24 mies. |
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