Equithermal controller ATMOS ACD01Connection of overheat protecting cooling loop
Connection of overheat protecting cooling loop with a safe¬ty valve Honeywell TS 130 - 3/4 A or WATTS STS20
(valve openning temperature 95 - 97°C)
CAUTION – in compliance with the EN ČSN 303-5, the cooling loop must not be used for any other purpose than overheat protection (never for heating hot potable water).
The TS 130 - 3/4 A valve or WATTS STS 20 valve, the sensor of which is placed in the rear of the boiler, prevents overheating in the following way: if the boiler water temperature rises above 95 °C, the valve opens and allows water from public water supply system to enter the cooling loop. This water then absorbs the excessive energy and exits to the sewer. In case that a non-return flapvalvehasbeen installed to the cooling loop water inlet for the purpose of preventing reversed water flow(whichmight be caused by pressure drop in the public water supply system), the cooling loop must be fittedwith a 6 – 10 bars safety valve or with an expansion vessel of minimum 4 l volume.
