Bosch ZSB 30-2 Installation And Servicing Instructions page 51

B Remove the gas throttle seat with a screw driver as
shown in Fig. 49.
2 .
1 .
6 7 2 0 6 1 2 6 5 9 - 3 7 . 1 R
Fig. 49
B Adjust the gas flow throttle to set the CO
for maximum rated output according to the table.
6 7 2 0 6 1 2 6 5 9 - 3 8 . 1 R
Fig. 50
max. rated heat
output
Gas Type CO
2
NG (23) 9.6 %
LPG (Propane) 10.8 %
LPG (Butane) 12.2 %
Table 20
B Briefly press the central heating boost button
The display shows the flow temperature in alternation
with = minimum rated heat output.
B Measure the CO or O
2
or O
2 2
min. rated
heat output
O CO O
2 2
3,6 % 9.0 % 4,7 %
4.6 % 10.2% 5.5 %
2.8 % 11.5 % 3.8 %
level.
2
Converting the appliance to different gas types | 51
B Remove the sealed brass screw from gas valve
adjusting screw and set CO
rated heat output.
2
1
Fig. 51
level
B Re-check settings at maximum and minimum rated
output and re-adjust if necessary.
B Repeatedly press the central heating boost button
until the light goes out.
The display will show the CH flow temperature again.
B Record the CO
B Remove flue gas probe from flue gas testing point and
refit sealing plug.
B Seal the gas valve and gas throttle.
2
.
or O level for minimum
2 2
or O levels in the commissioning log.
2 2
6 720 644 143 (2010/09)