Intergas Compact HRE 18 SB Installation, Service And User Instructions Manual - page 34
Intergas Heating Ltd
34
A. CO
2
demands at low setting for natural gas
The CO
2
level at low setting must be equal to or max. 0.3 % lower than the level at
high setting. Important: The CO
2
level at low setting must never be under 8.6%.
For example (natural gas):
1: CO
2
level at high setting is 9.2 % Æ CO
2
level at low setting is 8.9 – 9.2 % .
2: CO
2
level at high setting is 8.7 % Æ CO
2
level at low setting is 8.6 – 8.7 % .
B. CO
2
demands at low setting for propane
The CO
2
level at low setting must be between 0.3 % and 0.6 % lower than the level
at high setting. Important: The CO
2
level at low setting must never be under 9.3 %.
For example (propane):
1: CO
2
level at high setting is 10.5 % Æ CO
2
level at low setting is 9.9 – 10.2 %
.
2: CO
2
level at high setting is 9.8 % Æ CO
2
level at low setting is 9.3 – 9.5 % .
10.8 Setting gas/air adjustment
10.8.1
Setting by measurement of the CO
2
content of the combustion gases
A. Cover screw
B. Adjusting screw for low position
C. Offset pressure measurement nipple
D. Gas supply pressure measurement nipple
1. Switch the appliance off with the on/off key ( - on service display).
2. Unscrew the CO
2
measuring nipple and connect the measuring hose.
3. Remove the front panel from the appliance.
4. Switch the appliance on with the on/off key.
5. Adjust the appliance to the highest power by simultaneously pressing the keys
and on the operating panel until an
H
appears on the display.
6. Check if the CO
2
level is in accordance with the value mentioned in § 10.7.2.
CAUTION
It is not possible to adjust the CO
2
level at high setting. When the
CO
2
level at high setting is not within the prescribed tolerance band
please contact Intergas Heating.
7. Note the measured CO
2
value and adjust the appliance to the lowest power by
simultaneously pressing the keys
and on the operating panel until an
L
appears on the display.
8. Measure the CO
2
value. If the CO
2
value does not correspond with the value in
the table under 10.7.2 proceed with setting as follows:
9. Remove the cover cap (A).
10. Adjust the set screw (B) to the correct CO
2
value (clockwise higher and anti-
clockwise lower).
11. After measurement and setting replace the cover cap (A) and close the CO
2
measurement nipple.
12. Adjust the appliance to the maximum power by simultaneously pressing the keys
and (2 x) on the operating panel until an
H
appears on the display.
13. Measure the CO
2
value. If the CO
2
value does not correspond with the value in
the table under 10.7.2 please contact the manufacturer.
14. Press simultaneously on the and keys to leave the test program.
15. Fit the front panel to the appliance.
Note
Check that the measurement nipples used are gas-tight.
C
D
A + B