Frost Protection - Buderus GB162 User Instructions

 Purge the heating system via the air vents/valves
on the heating bodies. Start at the first floor of the
premises and then work your way up (fig. 7).
The pressure loss in a heating system is caused by
air bubbles escaping via fittings and (automatic) air
vents. The oxygen contained in the fresh heating
water will also escape from the heating water after
some time and cause a pressure loss.
Topping up once a year is normal. If it is necessary
to top up more frequently, there might be a leak in
the system or a defective expansion vessel. This
must be remedied as soon as possible.
4.4

Frost protection

When switched on, the boiler has an integrated frost
protection system. This means that no further frost
protection facilities should be installed on the boiler.
The frost protection switches the boiler on at a flow
temperature of 45 °F (7 °C) and off at a flow temper-
ature of 59 °F (15 °C). The heating system itself is
not protected against frost.
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Starting up the boiler
Fig. 7 Purging a radiator (example)
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