Operation Manual

23
♦ Boiler shut-down
You can switch off the boiler for a shorter period by pressing the 0/1button or potentially by the room
thermostat switch.
If you want to shut the boiler down for an extended period of time outside the heating season (i.e. during
summer holiday), it is suitable to switch off the boiler by the external main circuit-breaker (switch) unless there
is a potential risk of system freezing or pump clogging (these functions are naturally not available during the
complete boiler shut-down).
10. Diagram for serviceable connecting charge pressures of heating water
Warning: The curves of serviceable charge pressures of heating water are calculated for Grundfos 15/60
pumps to the higest regulation grade.
THERM EL Charge pressure
100
150
200
250
300
350
400
450
500
550
600
0.4 0.8 1.2 1.6 2.0 2.4
Water flow (m
3
/ h)
Outlet excess pressure (mbar)
8 kW
15 kW
23 kW
30 kW
38 kW
45 kW