Atag Blauwe Engel S-HR Series - Checking the CO

Installation instructions S-HR series page 23
- connect the digital pressure gauge hose to the
uppermost measuring nipple of the gas block
according to figure 13;
- activate the manual control by briefly pressing the
“-” key;
- take the fan to minimum load by means of the “-” key,
after which the measured pressure difference must
be between 0 and -4 Pa ;
- ending the manual selection is done by pressing the
“-” key until the minimum load is displayed. After
pressing this key again the text is shown
which means that the manual selection is off.
If it is determined that the zero pressure control deviates
too much, then it can be corrected by means of the
adjustment screw on the gas block.
13.3 Checking the CO
2
The CO
2
percentage is factory-set. This can be checked
by means of the following actions:
- put the boiler into operation by means of the service
chapter as described in chapter 11.2;
- place the lance of the CO
2
gauge in the location
according to figure 14;
- adjust to maximum load by means of the “+” key;
- ending the manual selection is done by pressing the
“-” key until the minimum load is shown. After pressing
this key again the text is shown which means
that the selection is off.
- adjust the CO
2
percentage according to table 12. The
CO
2
percentage can be adjusted by means of the
adjustment screw according to figure 15.
adjustment screw zero pressure control figure 13
measuring point for CO
2
figure 14
adjustment screw CO
2
figure 15