12.5 Checking the O2
i NOTICE
The O2 percentage is
This can be checked by means of the following procedure:
-Remove the black cover of the gas valve by unscrewing the sealed screw.
-Put the boiler into operation and take care that it can deliver its heat;
checkpoint CO2
i
figure 21
Tip: If there is no demand for heat on CH, turn the hot water tap completely open and measure the O2.
-Press the
-The display will show COdE followed by an arbitrary number;
-Select by means of the 
or the 
button the code C123;
-Press the
-Press the
-Press the
-Calibrate the O2 meter ;
-Place the probe of the O2 meter into the check point (see fig. 21);
-Press the 
button until the maximum value (in kW) is achieved; The boiler will burn on full load (value on display in kW)
- Check the O2 percentage: | value in BTU/hr = x3415 | |
between 4.4% and 4.7% | ||
Natural gas: full load: | ||
min. load: | between (setting of full load +0.2%) and 6.0% | |
Propane: full load: | between 4.8% and 5.1% | |
min. load: | between (setting of full load +0.2%) and 6.0% |
Installation & Servicing Instructions Rinnai
i NOTICE
adjustment screw CO2 figure 22
Example:Full load set on 4.6% O2 (natural gas) then the minimum load setting should be between 4.8% and 6% O2
Choose the right O2 value according the kind of gas (Natural Gas or Propane Gas). Wrong adjustment may result causing property damage, personal injury or death.
-Let the O2 meter do its measuring procedure.
-Adjust, if necessary, the adjustment screw to correct the O2 value
(see fig. 22).
Ending the O2 measuring procedure:
- Press the - button until OFF is shown (keep button pressed). With this the procedure has ended..
- Replace the black cover on the gas valve and fix it with the screw.
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