105
14.3
Adjusting after gas valve replacement or in case of gas conversion (case B)
In case of gas conversion, apply the corre-
sponding sticker at the appropriate position in
the boiler and mark the square for the used
gas type. Also mark the square, indicating that
the correct value has been set for parameter
P4BD.
(In the example below, ‘propane’ and ‘P4BD
= 1’ have been marked).
14.3.1 G
ENERAL REMARKS
As can be seen in the general scheme, the main adjusting steps in case
B
are the same as in case
A
, except for
these extra steps:
•
set the right gas group; parameter P4BD (display D8)
•
a pre-adjusting step, to make sure the burner will fire
All adjustments must result in CO
2
percentages within the table or figure 1 or 2.
In case of gas conversion: check parameter P4BD for the correct setting.
(See also next page
).
14.3.2 C
ASE
B
ADJUSTMENTS
Pre-adjusting the top burner:
•
Turn setting screw [2] of the upper gas valve
clockwise
until you feel resistance. This means that the valve
is closed,
do not try to tighten the screw any further
.
•
Now turn this screw
counter clockwise
(open), according to the number of turns in table 2 for the used
boiler and gas type.
If the burner doesn’t start up in service mode, turn screw [2] an extra quarter turn counter clockwise, and try again.
Pre-adjusting the bottom burner:
•
Turn setting screw [2] of the lower gas valve
clockwise
until you feel resistance. This means that the valve
is closed,
do not try to tighten the screw any further
.
•
Now turn this screw
counter clockwise
(open), according to the number of turns in table 2 for the used
boiler and gas type.
→ proceed according to steps in chapter 14.2.2.
If the burner doesn’t start up in service mode, turn screw [2] an extra quarter turn counter clockwise, and try again.
Checking both burners:
→ proceed according to steps in chapter 14.2.3.
PROPANE
PROPAN
PROPANO
PROPAAN
BUTANE/PROPANE
BUTAN/PROPAN
BUTANO/PROPANO
BUTAAN/PROPAAN
P4BD = 1
P4BD = 2
G31 P
G30/G31 B/P
