12.5 Checking the O2

i NOTICE

The O2 percentage is factory-set. This has to be checked at commissioning, maintance and faults.

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 MODE-button for 5 seconds.

-The display will show COdE followed by an arbitrary number;

-Select by means of the or the button the code C123;

-Press the Store-button to confirm the code (code blinks 1 x);

-Press the MODE-button until SERV is shown;

-Press the STEP-button once until 1 is shown; alternately 1 and OFF will be shown.

-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 E-Series

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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Rinnai E110CN, E110CP, E75CN, E75CP user manual Checking the O2

E75CP, E110CN, E75CN, E110CP specifications

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