Setting Frost Protection - Bosch Greenstar ZBR16-3A Operating Instructions Manual

30 | Operation
4.8

Setting frost protection

Frost protection of the heating system:
B Leave the appliance switched ON; turn the boiler high limit
dial at least to position 1.
Fig. 11
For further information, see the operating instructions for the
heating control unit included in the scope of delivery.
Alternatively if you prefer switching the appliance OFF:
B Ask a trained and certified heating contractor to mix anti-freeze
(see installation instructions) into the heating water. All DHW
pipes and DHW tank must be completely drained.
3
5
2
1
6
max
reset
eco
3 4
e
2
6
1
max
min
6 720 641 933-68.1O
6 720 644 013 (2011/02)