4.7 Connecting the hydraulic safety devices
1.1
2
3
4
1.2
1.3
1.5
1.4
1
Thermal discharge valve
▪ The thermal discharge safety device must be connected in accordance with
ÖNORM/DIN EN 303-5 and as shown in the diagram above.
▪ The discharge safety device must be connected to a pressurised mains water
supply in such a way that it cannot be shut off
▪ A pressure reducing valve (1.5) is required for a cold water pressure of 6 bar
Minimum cold water pressure = 2 bar
1.1 Sensor of thermal discharge safety device
1.2 Thermal discharge valve (opens at approx. 95 °C)
1.3 Cleaning valve (T-piece)
1.4 Dirt trap
1.5 Pressure reducing valve
2
Safety valve
▪ Safety valve as per prEN 1268-1 with a diameter of DN15
▪ The safety valve must be installed in an accessible place on the heat generator or
in direct proximity in the flow pipe in such a way that it cannot be shut off
3
Return temperature control with pump
4
Diaphragm expansion tank
▪ The diaphragm pressurised expansion tank must conform to EN 13831 and hold
at least the maximum expansion volume of the system’s heated water including a
water seal
▪ Its size must comply with the design information in EN 12828 - Appendix D
▪ Ideally it should be installed in the return line. Follow the manufacturer’s installa‐
tion instructions
Assembly
4
Connecting the hydraulic safety devices
Installation Instructions S3 Turbo | M1080813_en
61
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