Bosch ZSB 30-2 A Operations Instructions download pdf (Page 51)

Converting the appliance to different gas types | 51

6 720 644 143 (2010/09)

B Remove the gas throttle seat with a screw driver as

shown in Fig. 49.

Fig. 49

B Adjust the gas flow throttle to set the CO

or O

level

for maximum rated output according to the table.

Fig. 50

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

level.

B Remove the sealed brass screw from gas valve

adjusting screw and set CO

or O

level for minimum

rated heat output.

Fig. 51

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

or O

levels in the commissioning log.

B Remove flue gas probe from flue gas testing point and

refit sealing plug.

B Seal the gas valve and gas throttle.

max. rated heat

output

min. rated

heat output

Gas Type CO

NG (23) 9.6 % 3,6 % 9.0 % 4,7 %

LPG (Propane) 10.8 % 4.6 % 10.2% 5.5 %

LPG (Butane) 12.2 % 2.8 % 11.5 % 3.8 %

Table 20

1 .

2 .

6 7 2 0 6 1 2 6 5 9 - 3 7 . 1 R

6 7 2 0 6 1 2 6 5 9 - 3 8 . 1 R

6 720 614 090-22.1O

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 79 80

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Bosch ZSB 30-2 A Operations Instructions Page 51

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