Bosch 940 ES Installation And Operating Instructions Manual page 54

Maintenance and service
3. Verify both P1 and P2 CO
specified in table 37. Repeat steps 1 and 2 as necessary until
CO values are within the specified ranges.
2
Final Readings
P1 CO Reading:
2
P2 CO Reading:
2
D. Returning to Service:
1. Return slotted screw cover to original position.
2. Reinstall Torx cover.
3. Remove CO analyzer probe and reinstall flathead screw
2
with gasket in exhaust collar.
4. Press ON/OFF button to turn OFF the heater and then turn
ON the heater.
5. Heater is ready for normal operation.
Fig. 61 Adjusting P1 CO
Fig. 62 Adjusting P2 CO
54
readings are within the ranges
2
% CO
2
% CO
2
level
2
6720608158-38.1AL
level
2
940 ES – 6 720 644 930 (2019/09)