Gas type conversion
|
77
6 720 643 068 (2011/06)
Copyright (optional information)
B
On the gas throttle, break the seal at the slot and
remove the cap.
Fig. 70 Remove seal from the gas throttle
B
Adjust the gas throttle to match the CO
2
or O
2
level for
maximum nominal output according to table 30.
Fig. 71 Set CO
2
or O
2
level for maximum nominal output
B
Briefly press the emissions test button .
The display shows the supply temperature in
alternation with
=
minimum nominal output
.
B
Measure the CO
2
or O
2
level and the CO content of the
flue gas (
Æ
Section 12).
B
Remove the sealed screw (
Æ
Fig. 72, [3]) from gas valve
adjustment screw (
Æ
Fig. 72, [2]) and set CO
2
or O
2
level for minimum nominal output.
Fig. 72 Set CO
2
or O
2
level for minimum nominal output
B
Re-check settings at maximum and minimum nominal
output and re-adjust if necessary.
B
Repeatedly press the emissions test button
until the
light goes out.
The display returns to the supply temperature.
B
Record the CO
2
or O
2
levels and the CO content of the
flue gas in the commissioning log.
B
Reinstall the screw (
Æ
Fig. 72, [3]) to cover the gas
valve adjustment screw.
B
Remove flue gas probe and close the flue gas test port
properly.
Fig. 73 Close flue gas test ports
Maximum
nominal output
Minimum
nominal output
Gas type
CO
2
O
2
CO
2
O
2
NG
9.4 %
4.0 %
8.6 %
5.5 %
LPG (propane)
11.0 %
4.2 %
10.4%
5.1 %
Tab. 30 CO
2
or O
2
values at maximum and minimum nominal
output
1 .
2 .
6 7 2 0 6 1 2 6 5 9 - 3 7 . 1 R
6 7 2 0 6 1 2 6 5 9 - 3 8 . 1 R
6 720 641 933-81.1O
1
3
2
6 720 641 933-80.1O
