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13.3 C hecking the O
i
NOTICE
!
WARNING
checkpoint O
figure 31.1
2
i
NOTICE
O
check on full load (Step 1)
2
Full load
O
2
Values valid with closed air box.
62
at full load (Step 1/3)
2
The O
percentage setting is required to be checked at commissioning,
2
maintenance and faults and adjusted if needed.
The O
percentage is required to be checked and adjusted after a conversion
2
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.
The O
check consists of 2 steps or, if necessary, 3 steps:
2
Step 1:
Check on full load
Step 2:
Check on low load
Step 3:
Adjustment (if necessary).
Step 1: O
check on full load
2
The O
setting is preset at the factory, for all equipment units. A calibrated O
2
must be carried out during commissioning.
-
Put the boiler into operation and take care that it can deliver its heat.
Set the full load
You can set the full load of the boiler as follows:
-
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 O
2
-
Place the probe of the O
-
Press the + button until the maximum value (in kW) is achieved;
-
Check whether the O
value.
After this setting has been made, once more test the O
2 on page 62). If there are any changes in the result, then these must be corrected
(see Step 3 on page 63)
Choose the right O
Gas). Wrong adjustment may result causing property damage, personal injury
or death.
Natural Gas
Nominal 4.7%
Minimum 3.6%, maximum 5.5%
meter ;
meter into the check point (see fig. 30.1);
2
The boiler will burn on full load (value on display in kW)
values that are listed below correspond to the measured
2
value according the kind of gas (Natural Gas or Propane
2
value in BTU/hr = x3415
value at low load (see Step
2
Propane Gas
Nominal 5.1%
Minimum 4.1%, maximum 5.8%
check
2
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