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9.10 Combustion Setup (High-Fire)
• Unscrew exhaust port plug at exhaust flue test port.
• Insert combustion analyzer into exhaust flue test port.
Verify the opening around combustion analyzer probe is
completely sealed when taking measurements.
• Set boiler to high-fire by pressing two buttons
simultaneously. Display will show H3 and the symbol
will appear.
• Measure percentage of O
• Compare the measured values with values in table
below.
• Adjust gas/air ratio using high-fire adjustment screw (V)
if needed. Turn screw clockwise to reduce CO
counterclockwise to increase it.
CO
Values Natural Gas (A) at High Fire
2
Front Panel
ON
OFF*
CO
Values Propane Gas (E) at High Fire
2
Front Panel
ON
OFF*
* Installer's guide only. Use test port to verify safe CO
levels with door installed before leaving job site.
9 - START UP PROCEDURE
or CO
in flue gases.
2
2
level and
2
V
CO
%
2
Nominal
Range
9.3
9.1 - 9.5
8.9
8.5 - 9.0
CO
%
2
Nominal
Range
10
9.8 - 10.2
9.6
9.2 - 9.7
9.11 Combustion Setup (Low-Fire)
• Unscrew exhaust port plug at exhaust flue test port.
• Insert combustion analyzer into exhaust flue test port.
Verify the opening around combustion analyzer probe is
completely sealed when taking measurements.
• Set boiler to low-fire by pressing two buttons
simultaneously. If the boiler is already in combustion
setup mode for high fire, press the (-) button several
time until L3 is displayed on the screen.
• Measure percentage of O
• Compare the measured values with values in table
below. Remove front panel when comparing values.
• Adjust gas/air ratio using low-fire adjustment screw (K)
if needed. Turn screw clockwise to increase CO
and counterclockwise to decrease it.
O
/CO
Values at Low-Fire Natural Gas (A)
2
2
Nominal value
O
%
CO
%
2
2
5.7
8.5
O
/CO
Values at Low-Fire Propane Gas (E)
2
2
Nominal value
0
%
CO
%
2
2
6.4
9.6
9.12 Operational Check
• Inspect combustion air and vent piping. Verify pipe is
not leaking and terminations are unobstructed. Verify
vent gas discharge is not a nuisance or hazard.
• Verify boiler functions.
• Inspect condensate disposal system. Verify condensate
flows adequately and is disposed properly.
• Check control module operation.
• Check field sourced limits, low water cutoffs, etc. per
manufacturer's instructions.
54
or CO
in flue gases.
2
2
level
2
K
Permitted value
O
%
CO
%
2
2
5.4 - 6.1
8.3 - 8.7
Permitted value
0
%
CO
%
2
2
6.1 - 6.70
9.4 - 9.8
P/N 240011656, Rev. E [07/30/2018]
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Troubleshooting
