2.8 Safety devices
1 BOILER OFF
(switches off the boiler to prevent overheating)
❒ Tap “Boiler off”
➥ Automatic mode is switched off
➥ Control system follows the boiler shut-down procedure
➥ Pumps continue to run
2 MAIN SWITCH
(switches off the power supply)
Before carrying out work on/in the boiler:
❒ Tap “Boiler off”
➥ Automatic mode is switched off
➥ Control system follows the boiler shut-down procedure
❒ Switch off the main switch and let the boiler cool down
3 SAFETY TEMPERATURE LIMITER (STL)
(protection against overheating)
The STL switches off the combustion system when the boiler reaches 105°C. The
pumps continue to run. Once the temperature falls below approx. 75°C, the STL can
be reset mechanically.
SV SAFETY VALVE
(protection against overheating/excess pressure)
When the boiler pressure reaches a maximum of 3 bar, the safety valve opens and the
heated water is blown off in the form of steam.
Safety
2
Safety devices
Operating Instructions T4 24-150 | B0830317_en 17
To Next Page
Loading...
Need help?
General