Rinnai M060C Installation And Operation Manual page 62

Step 3: Set the O2 at Minimum Input
1. While still in service mode (as described in the previous step), use the scroll wheel to adjust to
0%.
2. Press OK.
3. The boiler is now at minimum input.
4. After the boiler has run for approximately one minute, the O2 value displayed on the
combustion analyzer should read a value as shown in the Nominal O2 Percentages table (see
section Step 2: Set the O2 at Maximum Input).
Example: If maximum input value is 4.8% on natural gas, then minimum input value should be
between 5.2% and 6.4%.
If the values do not match, adjust the parameters by following the steps in the Adjust O2
Percentages section.
5. When adjustments are complete, place the plug back into the flue gas test port.
6. On the controller, press and hold the Back button until the Home screen appears in the
window.
Adjust O2 Percentages
This section is required only if it is necessary to adjust O2 percentages.
Rotate the screw on the gas valve assembly slowly. Allow the boiler to operate for approximately
one minute for the O2 value to stabilize. Repeat until you reach the levels shown in the Nominal
O2 Percentages table (see section Step 2: Set the O2 at Maximum Input).
•
Rotate counter-clockwise to decrease the O2 percentage
•
Rotate clockwise to increase the O2 percentage
62
THIS SECTION IS INTENDED FOR THE INSTALLER
Rinnai M-Series Condensing Boiler Combi Manual
INCREASE O2
DECREASE O2
Counter-Clockwise
Clockwise