Table of Contents
8
Measuring carbon dioxide (CO
Note: After installation of the outdoor vent cap,
measuring CO
for proper levels is recommended
2
before operating the appliance. See water heater
installation manual for details.
Warning: Outdoor vent cap will get
very hot during operation.
B Ensure the vent cap is cool before
performing the procedure below.
B To measure CO
on this appliance, a test port is
2
available under the louvered grill on the front of the
outdoor vent cap.
B To access test port, remove two screws on either
side of the louvered grill.
B Pull louvered grill free from vent cap.
B Insert combustion gas analyzer probe approximately
4 inches straight into test port. Do not slope probe
up or down.
B Confirm CO
is within proper range specified in the
2
water heater installation manual. Refer to water
heater installation manual if any adjustment is
necessary.
B When measuring is complete, replace louvered grill
with screws.
Fig. 23
1
Test port
6 720 645 551
2
1
6720645551-03.1V
Measuring carbon dioxide (CO2)
)
13
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