Ariston CLAS B 28 FF, Installation And Service Instructions Manual

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41
commissioning
C hec k ing the gas settings
Remove the front casing and proceed as described below.
S upp l y pressure chec k
1. Loosen screw “1” (Fig. a) and insert the pressure gauge connection
pipe into the pipe tap.
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 supply 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.
C hec k ing the D .H.W. ma x imum po w er
1. To check the maximum power level, loosen screw “2” (Fig. b) and
insert the pressure gauge connection pipe into the pipe tap.
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 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 hood and tighten or loosen the adjustment screw “3”
(fi g. c).
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.
C hec k ing the minimum po w er
1. To check the minimum power level, loosen screw “2” (Fig. b) and
insert the pressure gauge connection pipe into the pipe tap.
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).
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.
1
(a)
3
(c)
2
(b)
4
(d)