When the primary heating circuit is on and the heating water temperature has reached approximately

43°C and the room thermostat is calling for heat, the pump will activate and feed the under floor

heating loops.

The blending valve will maintain the temperature of the heating loop by continually blending the flow

from the boiler with the cooler return flow from the underfloor heating loop.

The heat output can be adjusted with the control knob on the blending valve to suit different floor

structure and comfort levels.

The room thermostat will switch the pump off when the selected room temperature is reached.

When the primary heating is off and the room stat is calling for heat, the pump will continue to run

until the heating loop temperature falls to approximately 30°C. when it will automatically switch off.