25
for the technician
First firing, regulation and servicing instructions
Slow opening regulation
When boiler is ignited, burner is fed for 8 seconds with a
gas at a lower pressure then usual; afterwards pressure
increases up to requested values. Such ‘slow opening’
pressure must guarantee correct and immediate ignition
avoiding noises while igniting.
— Loosen (2 – 3 rounds) screw of gas valve pressure
hole (part 1 figure ‘Gas valve’) and connect
manometer;
— while boiler is not working (green light flashing), select
parameter 3 and push once knob
or .
Burner will ignite allowing slow opening regulation. To
correct values shown, push knobs or
until correct values are reached. (Correct, default
values are shown in the here attached table);
— store pressure pushing
;
— should you regulate heating power (mandatory for first
ignition), proceed to next phase. Otherwise, remove
gas probe, screw the relevant screws and verify gas
leakage.
Max heating power
regulation
Maximum heating power must be set according to actual heating system design. Please find herewith
table with power/gas pressure values. To regulate heating output proceed as follows:
— Actual heating system power must be known according to plant design;
— unscrew (2-3 rounds) screw of gas valve pressure hole (part 1 figure ‘Gas valve’) and connect
manometer;
— while boiler is not working (green light flashing), select parameter 4 and push once knob
or . Burner will ignite allowing maximum heating power regulation. Push knobs
or until correct value is reached;
— store pressure pushing
;
— remove gas probe, screw the relevant screws and verify gas leakage.
GAS VALVE
Pressure tapping pionts:
1 = Gas OUT
2 = Gas IN
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