Rinnai E75CN - Manual (Page 52)

Installation & Servicing Instructions Rinnai E-Series
52
12.3 Checking for contamination
In order to be able to check the boiler for contamination in the following running
years it is advisable to measure the maximum air displacement in the boiler
when putting the boiler into operation. This value can be different with each
type of boiler.
In order to be able to measure this value follow the next procedure:
- 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 until 2 is shown;
alternately 2 and OFF will be shown.
- Turn open the upper measuring nipple on the gas valve (fig. 18);
- Connect the hose of the digital pressure gauge to the upper measuring nipple of
the gas valve
- Press the button until the maximum value is achieved;
The fan will function to its maximum revolutions (burner stays off)
- Measure the under pressure and write down this value.
At the next servicing visit this value may drop 20% of its original value on
the moment of installation. When this value is dropped more than 20% the
boiler needs maintanance.
- Press the button until OFF is shown (keep button pressed)
With this the procedure is finished.
Check point contamination
figure 18
NOTICE
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NOTICE
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