Bosch ZWB28-3A SERIES Operating Instructions Manual page 17

▶ Adjusting the supply temperature with the boiler high limit dial
– Radiant floor heating: e.g. setting 3 (approx. 122 °F (50 °C))
– Panel or cast iron radiator heating: setting 6 (approx. 167 °F (75 °C))
– Heating with supply temperatures up to 194 °F (90 °C): setting max
Fig. 5
The burner ON indicator lamp lights up if the burner is operating.
Boiler high limit dial
1
2
3
4
5
6
max
Table 3 Typical supply temperatures
6720872363 (2017/04)
4
3
2
5
1
6
max
Typical supply
temperatures
approx. 95 °F (35 °C)
approx. 109 °F (43 °C)
approx. 122 °F (50 °C) Radiant floor heating system
approx. 140 °F (60 °C)
approx. 153 °F (67 °C)
approx. 167 °F (75 °C) Radiator heating system
approx. 187 °F (86 °C) Convector heating
Operation | 17
reset
eco
3 4
e
2
1 6
min max
6 720 641 933-53.1O
Sample application
Frost protection
Greenstar combi 100 p / 151 p
: