Installation | 5
M2050222_en | Installation instructions Lambdamat LM 1500 KOM
51
5.8 Hydraulic connection
5.8.1 Thermal discharge safety device connection
1.5
1.4
1.6
1.7
1.2
1.3
1.8
1.5
1.4
1.3
1.2
1.8
1.7
1.1
1.1
1.6
4
3
5
2
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 sensor must be connected to a pressurised cold water mains
supply (temperature ≤ 15°C) 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
1.3 Cleaning valve (T-piece)
1.4 Dirt trap
1.5 Pressure reducing valve
1.6 Backflow preventer to prevent stagnation water from entering the drinking water
network
1.7 Free outlet without counter pressure with observable flow path (e.g. discharge funnel)
1.8 Thermal discharge valve with zone valve (opens at approx. 95°C)
2
Safety valve
▪ Requirements for safety valves as specified by DIN EN ISO 4126-1
▪ Minimum diameter for the inlet to the safety valve as specified by EN 12828:
DN15 (≤ 50 kW), DN20 (> 50 to ≤ 100 kW), DN25 (> 100 to ≤ 200 kW), DN32 (> 200 to
≤ 300 kW), DN40 (> 300 to ≤ 600 kW), DN50 (> 600 to ≤ 900 kW)
▪ Maximum pressure setting in terms of the permissible operating pressure of the boiler,
see the section “Technical Data”
▪ The safety valve must be installed in an accessible place on the boiler or in direct
proximity in the flow pipe in such a way that it cannot be shut off
▪ Unhindered and safe escape of the steam or water that is released must be ensured
3
Return temperature control
4
Diaphragm expansion tank
