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

20 | Operation
▶ Turn the boiler high limit dial
Fig. 8
For further information, see the operating instructions for the heating control unit
included in the scope of delivery.

4.8 Setting frost protection

Frost protection of the heating system:
▶ Leave the appliance switched ON; turn the boiler high limit dial
position 1.
Fig. 9
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:
▶ 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.
Greenstar
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reset
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6 720 641 933-68.1O
6 720 818 061 (2015/11)
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