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In case of boiler overheating (outlet temperature is higher than 95 °C) the thermostatic valve switches
(starts to operate) and the superfluous heat is withdrawn via the after cooling loop.
Fig. no. 27 Boiler withs after- cooling loop – connecting dimensions
Fig. no. 28 Boiler with after- cooling loop
1 Heating water outlet into system 2”
2 After-cooling loop
3 Thermostatic valve BVTS (STS 20) TV 95 °C
4 Cooling water inlet 1/2 “
5 Cooling water outlet 1/2”
6 Thermostatic valve sensor
7 Return water inlet into boiler from system 2”
8 Return water inlet from after-cooling loop 1 1/2”
