29
commissioning
Checking the gas settings
Remove the front casing and proceed as described below.
Supply working pressure check
1. Loosen screw “1” (Fig. a) and attach the pressure gauge
connection pipe onto the test nipple.
2. Switch the boiler on at maximum power, enabling the “fl ue
sweep” function (press the
button for 5 seconds; the
display will show “t -- “). The working pressure should correspond
to the value established in relation to the type of gas for which
the boiler is designed.
3. When the check is over, tighten screw “1” and make sure it is
securely in place.
4. The “fl ue sweep function” is automatically deactivated after 10
minutes or when the
button is pressed.
Checking the D.H.W. maximum power
1. To check the maximum power level, loosen screw “2” (Fig. b)
and connect the pressure gauge connection pipe onto the test
nipple.
2. Disconnect the air chamber compensation tube.
3. Run the hot water at maximum power, enabling the “fl ue
sweep” function (press the
button for 5 seconds); the
display shows “t -- “); press the programming key + to activate
operation at the maximum hot water power level. The display
will show “t -- “.
The supply pressure should correspond to the value shown in
the “Gas Settings” table, in relation to the type of gas for which
the boiler is designed. If it does not correspond, remove the
protective cover on the gas valve and tighten or loosen the
adjustment screw “3” (fi g. c) to adjust.
4. When the check is over, tighten screw “2” and make sure it is
securely in place.
5. Replace the cover protecting the modulator.
6. Reconnect the compensation tube.
7. The “fl ue sweep function” is automatically deactivated after 10
minutes or when the
button is pressed.
Checking the minimum power
1. To check the minimum power level, loosen screw “2” (Fig. b) and
insert the pressure gauge connection pipe as above.
2. Disconnect the air chamber compensation tube.
3. Switch the boiler on at maximum power, enabling the “fl ue
sweep” function (press the
button for 10 seconds; the
display shows “t -- “); press the programming key - to activate
operation at the minimum hot water power level. The display
will show “t __ “.
Disconnect a wire from the modulator (fi g. d); the supply
pressure should correspond to the value shown in the “Gas
Settings” table, in relation to the type of gas for which the
boiler is designed. If it does not correspond, tighten or loosen
the adjustment screw “4” (fi g. d) to adjust.
4. When the check is over, tighten screw “2” and make sure it is
securely in place.
5. Reconnect the modulator wire.
6. Reconnect the compensation tube.
7. The “fl ue sweep function” is automatically deactivated after 10
minutes or when the
button is pressed.
Check all test nipples for tightness when all checks are
complete.
1
2
3
4
(a)
(b)
(c)
(d)
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