Radiant DIAGNOCODE SM 20015 - Page 12

P.C.B. SM 20015 – boiler settings
9
D
10
20
30
40
MANO METRO
9: Mechanical minimum gas pressure setting
The mechanical minimum gas pressure is factory calibrated on all boilers at 17/18 mmH20.
When replacing the gas valve adjust the mechanical minimum pressure as follows:
:
• Using a single cut screwdriver turn D screw (fig.1 ) clockwise and tight it ;
• To adjust the mechanical minimum, turn D screw (fig.1) counter-clockwise for
two complete turns.
Parameter 10 setting: MINIMUM HEATING OUTPUT SETTING
To check or modify the existing pressure value:
a. insert a manometer into the gas valve pressure point B (fig.1);
b. Put ON / OFF button
1 in OFF position ( );
c. Push pad
6 and simultaneously and keep them pressed;
d. Put ON / OFF button
1 in ON position ( ) and wait until the display shows - ;
e. Release pad
6 and ;
f. Keeping pad
pressed, press pad 6 and select parameter no. ;
g. Release service pad
, press and release service pad ;
h. The display
will show the parameter value to be set or modified;
i. The manometer inserted in the pressure point B (fig. 1) will show the minimum gas pressure;
j. If that value is different than the one stated on the data plate, modify it by pressing pad
6 to increase or pad to decrease gas pressure ;
k. Once the minimum gas pressure has been adjusted, switch the boiler OFF by putting ON / OFF button
1 in OFF position ( );
l. Remove the silicon pipe from the pressure point B (fig.1), close tightly the pressure point screw and make sure there are no gas leaks;
m. Position the ON / OFF button
1 in ON position ( );
Gas valve VK 4105G
P
L
0
1
0
Fig. 1