Bosch 2400E NG - Manual (Page 32)

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Special adjustment for measuring and adjusting CO2 levels
9 Special adjustment for measuring and adjusting CO
2
levels
The CO
2
can only be adjusted by a certified gas
technician with a calibrated CO
2
analyzer.
Static Gas Pressure: “ WC
P1 Operating Pressure: “ WC
The P1 minimum operating pressure is 5" WC for
Natural Gas and 11"WC for Propane. Do not proceed
in adjusting CO
2
until pressure has been verified to be
at or above these levels, but not to exceed 14” WC.
A. Once Pressure is good
B Turn ON/OFF switch to the OFF (O) position.
B Remove brass flat head screw on the exhaust collar
as seen in Fig. 42.
B Insert CO2 analyzer probe into the measuring port.
The tip of the probe should be in the center of the flue
pipe (approx 1.5" inserted).
Fig. 42