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Table 22. Combustion Settings.
8. If needed, adjust the fuel pressure adjustment
screw (See Figure 51) to obtain a
CO 2 measurement of 9.0% +/- 0.2%.
NOTE: Turn the adjustment screw only a
quarter turn per adjustment either up or down,
then watch the combustion analyzer for the
result.
Once the Hi-Fire CO 2 is within the range
shown above, move on to Step 9.
If the gas pressure is within range and the Hi-
Fire CO 2 will still not adjust to an acceptable
level,
then Call Factory.
9. With the High-Fire CO 2 stabilized and
acceptable at 9.0% +/- 0.2%, go to the
touchscreen display and adjust the Manual
Firing Rate to 5% for Low Fire combustion.
10. Wait until the combustion analyzer stabilizes
at the 5% rate (at least 5 minutes), to observe
the new CO 2 and CO readings.
CO 2 at Low-Fire is 'Greater than 8.0%
& less than 9.2%'. DO NOT ADJUST
AT LOW-FIRE.
If Low-Fire is NOT within range, then go back
to Step 5 and Repeat, adjusting only at High-
Fire.
Additionally, CO needs to be less than 50
PPM.
Check again that the incoming gas supply
pressure falls within the correct range.
See Table 23 on page 111
11. If a High-Fire CO 2 of 9.0% +/- 0.2% and at
Low Fire CO 2 of greater than 8.0% & less
than 9.2% can NOT be achieved, then call the
Manufacturer.
If these parameters have been achieved, then
12. Disable Manual Firing Rate
13. Return to the O 2 Configuration Menu and
Enable the O 2 Trim.
FT
Gas Type
High-Fire CO 2
9.0% +/- 0.2%
Natural
Hi-Fire
Acceptable
Maximum CO (ppm)
Low-Fire CO 2
Greater than 8.0%
& less than 9.2%
Natural Gas
4.0 IN - W.C.
Min
10.5 IN - W.C.
Max
Table 23. Gas Pressure
Page 111
50
LP (propane)
8.0 IN - W.C.
13.0 IN - W.C.
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