Tech ST-27i boiler automation for controlling two pumps

TECH ST-27i

The TECH ST-27i controller is designed to monitor the operation of the central heating circulation pump and an additional pump (hot water or underfloor). It is equipped with an LCD display.

Operating principle.

The pump's purpose is to turn on the central heating pump when the coolant temperature reaches the turn-on threshold and turn it off when the boiler cools down (in the event of a shutdown). For the second pump, in addition to the turn-on temperature, the user sets a target temperature until which the pump will operate.

Let's look at an example of controlling a central heating pump. Using the TECH ST-27i controller, set the temperature on the LCD screen, for example, 35°C. Light the boiler. When the temperature reaches 35°C, the TECH ST-27i controller turns on the central heating pump, and water begins to flow into the heating system.
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Country of origin: Poland