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8
Measuring carbon dioxide (CO2)
6
Measuring carbon dioxide (CO
2
)
B
See the water heater installation manual for details
on measuring carbon dioxide (CO
2
).
B
To measure CO
2
on this appliance, a measuring port
is available under the louvered grill on the front of the
outdoor vent cap.
B
To access measuring port, remove two screws on
either side of the louvered grill.
B
Pull louvered grill free from vent cap.
B
When measuring is complete, replace louvered grill
with screws.
Fig. 11
1
Measuring port
Warning:
Outdoor vent cap will get
very hot during operation.
B
Ensure the vent cap is cool before
performing the procedure below.
Summary of Contents for 2400 ES
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