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Model
Size
%CO
2
%O
2
Max. CO
Air Free
85
8.7 - 10.5
2.5 - 5.6
COAF readings
must be less than
200 ppm.
110
8.7 - 10.5
2.5 - 5.6
155
8.7 - 10.5
2.5 - 5.6
205
8.7 - 10.5
2.5 - 5.6
270
8.7 - 10.5
2.5 - 5.6
XI. Start-Up and Checkout
(continued)
Table 11.4: Acceptable Combustion Readings for Natural Gas (0-4,500 ft.)
NOTICE
This boiler has a limited warranty, a copy of which is included with this boiler. It is the responsibility of
the installing contractor to see that all controls are correctly installed and are operating properly when the
installation is complete.
WARNING
All combustion performance numbers MUST be verified with a combustion analyzer. Failure to do so will
result in substantial property damage, severe personal injury or death.
Table 11.5: Starting Number of Throttle Turns for Natural Gas
Model
Size
No. Counter-clockwise Turns
(From Fully Closed)
85
4½
110
4½
155
6½
205
6¼
270
2½