Bosch 250 SX LP Manual page 33

D. Returning to Service:
1. Return slotted cover to original position.
2. Reinstall Torx cover.
3. Remove CO analyzer probe and reinstall flathead
2
screw in exhaust collar.
4. Turn ON/OFF switch to the OFF (O) position and
then back to the ON (I) position.
5. Heater is ready for normal operation.
Without Front
Nat. Gas
9.1 ± 0.1 %
P1
max. input
9.4 ± 0.1 %
min. input P2
10.1 ± 0.1 %
max. input P1
10.4 ± 0.1 %
P2
min. input
* Final reading must be confirmed with the front cover
on, CO levels increase when the cover is installed.
2
Table 9
Final Readings
P2 CO Reading:
2
P1 CO Reading:
2
Fig. 44
6 720 607 057
Special adjustment for measuring and adjusting CO2 levels
With Front
Cover Cover
Nat. Gas
9.7 ± 0.1 %
9.7 ± 0.1 %
LP Gas LP Gas
10.7 ± 0.1 %
10.7 ± 0.1 %
% CO
2
% CO
2
Fig. 45
33