All settings have already been made in the factory. If the boiler needs new settings after repairs have been made, the
gas valve changed, or after a conversion from methane to LPG, proceed as follows.
9
The settings for minimum fan speed, maximum CH fan speed, maximum DHW fan speed, and ignition slow fan
speed must be made in the sequence given and must only be made by qualified personnel.
A
B
A
A
A
− Switch on mains power to the boiler.
− Turn the function selector to OFF/RESET (the di-
splay shows “- -”).
− Unscrew the four screws (A) and remove the front
trim (B).
− Adjust the trimmers in the sequence given below
to achieve the values specified in the table:
1 .MAX (1a) Maximum fan speed
2 .MIN (2a) Minimum fan speed
MINIMUM FAN SPEED
METHANE
(G20)
PROPANE
(G31)
20 ISC Solar
1 .3
1 .3
x 1000 rpm
30 ISC Solar
1.6
1.6
x 1000 rpm
3 .HTG (3a) Maximum CH fan speed
MAXIMUM CH FAN SPEED
METHANE
(G20)
PROPANE
(G31)
20 ISC Solar
6.1
6.1
x 1000 rpm
30 ISC Solar
6.0
6.0
x 1000 rpm
4 .IGN (4a) Burner ignition slow fan speed
(set to 3.7 = 3700 rpm)
9
The burner ignition slow fan speed trimmer must
be adjusted after all the other trimmers have been
adjusted.
BURNER IGNITION SLOW FAN SPEED
METHANE
(G20)
PROPANE
(G31)
20 ISC Solar
3.7
3.7
x 1000 rpm
30 ISC Solar
3.4
3.4
x 1000 rpm
9
Setting changes do not cause the burner to ignite.
As you turn the trimmers, the 2 digit display shows
the current setting value expressed in thousands
(e.g. 2.5 = 2500 rpm).
3 .6
Settings
MAXIMUM FAN SPEED
METHANE
(G20)
PROPANE
(G31)
20 ISC Solar
6.1
6.1
x 1000 rpm
30 ISC Solar
6.0
6.0
x 1000 rpm
46
TECHNICAL ASSISTANCE SERVICE
