Checking The O - Rinnai E75CN Installation & Servicing Instructions Manual

12.3 Checking the O

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NOTICE
!
WARNING
checkpoint O
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figure 27
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NOTICE
adjustment screw O
2
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NOTICE
62
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The O percentage setting is required to be checked at commissioning,
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maintenance and faults and adjusted if needed.
The O percentage is required to be checked and adjusted after a conversion
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from NG to LP or from LP to NG. This process must be done with a calibrated
combustion analyzer that has been set to the correct gas type.
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;
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Tip: If there is no demand for heat on CH, turn the hot water tap completely open
and measure the O
- Press the MODE-button for 5 seconds.
- The display will show COdE followed by an arbitrary number;
- Select by means of the
- Press the Store-button to confi rm 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 O
- Place the probe of the O
- Press the
When adjusting from max. to min. load it is advisable to stop at medium load
to allow the boiler to stabilize. Adjusting quickly from max. to min. could force
the boiler into an error state.
- Check the O
Natural Gas: full load:
Propane:
Example:Full load set on 4.6% O
be 4.8% or greater.
fig. 28
Choose the right O
Gas). Wrong adjustment may result causing property damage, personal injury
or death.
- Let the O
- Adjust, if necessary, the adjustment screw to correct the O
(see fi g. 28). Allow boiler to stabilize before reading the new value.
.
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or the
meter ;
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meter into the check point (see fi g. 27);
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button until the maximum value (in kW) is achieved;
The boiler will burn on full load (value on display in kW)
percentage:
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between 4.4% and 4.7%
min. load: setting of full load +0.2% or greater
full load: between 4.8% and 5.1%
min. load: setting of full load +0.2% or greater
(natural gas) then the minimum load setting should
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value according the kind of gas (Natural Gas or Propane
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meter do its measuring procedure.
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button the code C123;
value in BTU/hr = x3415
value
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