ST-27i controller for the central heating and hot water pump

Controllers for CH and DHW pumps

The presented regulator ST-27i is designed for controlling operation of the central heating circulation pump and the auxiliary pump (HUW or floor pump). The regulator's task is to switch on the CH pump if the temperature exceeds the switch-on threshold value, and to switch it off if the boiler cools down (due to extinguishing).

For the second pump, in addition to the switch-on temperature, the user sets the preset temperature until which the pump will operate.

FUNCTIONS PERFORMED BY THE CONTROLLER

• Control of the CH pump
• Control of additional DHW or floor pump
• Anti-stop function
• Anti-freeze function
  
  
  

CONTROLLER EQUIPMENT

• LCD display
• CO temperature sensor
• Auxiliary pump temperature sensor
• Pulse knob
• Housing made of high quality materials resistant to high and low temperatures
  
  
  

 CONTROLLER CHARACTERISTICS

• Power supply: 230V / 50Hz +/-10%
• Maximum power consumption of the controller: 4W
• Ambient temperature: 5°C - 50°C
• Maximum load of pump output: 1A
• Temperature setting range CO: 30°C - 75°C
• Setting range for CO temperature: 20°C - 75°C
• Hysteresis: 2°C
• Measurement accuracy: 1°C - 20°C
• Sensor temperature endurance: -30°C - 99°C
• Fuse link: 3.15A