Italtherm CITY BASIC - Gas Pressure Checks and Adjustments

23
Inlet gas check
Remark: The pressure should be measured at nomi-
nal input, so this test must be performed with the
burner ignited.
 Loosen (2-3 turns) the screw of pressure tapping
point for gas inlet 2 of the gas valve and insert the
manometer sensor;
 check that the measured pressure complies with
the inlet gas nominal pressure (see "Technical data"
on page 34).
 close the pressure tapping point 2 and check the
absence of gas leaks.
Max and Min pressure adjustment
 Loosen (2-3 turns) the screw of pressure tapping
point for gas outlet 1 of the gas valve and insert the
manometer sensor. Do not use the tapping point
“Vent” 3 that must always be closed;
 Acvate the boiler to its maximum output not modulated, using the “Chimney-sweeper” funcon.
Proceed as follows:
• supply the boiler and turn the Summer/Winter knob
to Summer posion ;
• provide that Room Thermostat contact is closed (acvated) or open an hot water tap (the heat
produced by the boiler will be drained consequently);
• turn the Hot Water knob
to the posion Chimney-sweeper and wait (about 5 seconds) that
the display shows “SE” (SErvice) ashing (moreover,  lamp ashes with short lightnings).
• when the display shows “SE” ashing, turn the Hot Water knob
on the scale . On the dis-
play, the indicaon service appears and the burner ignites at the maximum output not modulated
(the YELLOW indicator turns on);
Pressure tapping points:
1 outlet
2 inlet
3 equalizaon (VENT)
(not used in natural
draught models)