Technical data

SERVICING

AND

MAINTENAN

INSTRUCTIONS

CONDENSING WALL-HUNG BOILER – TG05A052.A0205

MANOMETRO

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

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

in OFF position ( );

c. Push pad 6 and 4 simultaneously and keep them pressed;

d. Put ON / OFF button

in ON position ( ) and wait until the display shows - ;

e. Release pad

and

;

f. Keeping pad5 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

to increase or pad

to decrease

gas pressure;

k. Push service pad

to confirm the setting; display will show parameter no. ;

l. Once the minimum gas pressure has been adjusted, switch the boiler OFF by putting ON / OFF button 1 in OFF position ( );

m. 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;

n. Position the ON / OFF button

in ON position ( );

Gas valve VK 4105G

Fig. 1