Bosch Greenstar ZBR16-3A Operating Instructions Manual page 31

Frost protection of the DHW tank:
B Turn the DHW thermostat
(59 °F (15 °C)).
Fig. 12
6 720 644 013 (2011/02)
3 4
2
5
1
6
max
counterclockwise to min
reset
eco
3
e
2
1 6
min
max
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