Specifications

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Notes
11.1 Draining the system in case of frost
It is not recommended, but if the boiler needs to be shut down
for a longer period of time, then it is necessary to drain the
system. Especially when there is a chance for frost conditions.
z Turn off the boiler by setting the mains power to "0" (fig. 5,
item 1).
z Close the gas valve (fig. 8, item 1).
z Drain the system at its lowest point using the stop valves or
radiator (see fig. 9). The automatic air vent at the system’s
highest point must be open.
fig. 9 Draining the system