Beretta EXCLUSIVE GREEN HE 25 B.S.I. Installer And User Manual page 21

16 - ADJUSTMENTS
The boiler has already been factory adjusted by the manufacturer.
If a new adjustment is required, for example, after extraordinary
maintenance, replacing the gas valve or converting from natural
gas to LPG, proceed as follows.
Maximum and minimum power, minimum and maximum
heating, must be adjusted in the indicated sequence by
qualifi ed staff.
- Loosen the two fi xing screws (A) and remove the shell (fi g. 3)
- Lift up the panel and turn it forwards
- Loosen the pressure tap screw downline from the gas valve by
about two turns and connect the pressure gauge to it
CALIBRATION & SERVICE operations must be performed with
the boiler in the OFF position. To do this, press the
until the display shows "- -" (fi g. 43).
During parameter modifi cation operations, the "select functions"
button acts as an ENTER (confi rm) button, the
as an ESCAPE button. If no confi rmation is given within 10
seconds, the value is discarded and returns to the previously
set one.
Setting the password
Press and hold down the operating mode button and the
together for about 10 seconds. The display will look like fi g. 44.
Enter the password for accessing the parameter modifi cations
function by turning the domestic hot water temperature selector to
the required value.
The password is located on the back side of the control panel.
Confi rm by pressing ENTER.
Calibration phases
Turn the domestic hot water selector to sequentially scroll the
CALIBRATION & SERVICE phases:
- 1 gas type
- 2 boiler power (do not modify this parameter)
- 10 domestic hot water mode (do not modify this parameter)
- 3 insulation level of building (only if external sensor is
connected)
- 45 inclination of thermoregulation curve (OTC), only if external
sensor is connected)
- 47 inclination of thermoregulation curve 2CH (OTC), only if
external sensor is connected)
- HP maximum fan speed (do not modify this parameter)
- LP minimum fan speed (do not modify this parameter)
- SP ignition speed (do not modify this parameter)
- HH boiler at maximum power
- LL boiler at minimum power
- MM fan ignition speed (do not modify this parameter)
- 23 maximum heating adjustment possibility
- 24 minimum heating adjustment possibility.
The parameters 2 - 10 - HP - SP - LP - MM - 23 - 24 must
be modifi ed, by professionally qualifi ed personnel, only
if absolutely necessary. The manufacturer refuses any
responsibility in the case of incorrect setting of the pa-
rameters.
MAXIMUM VENTILATOR SPEED (P. HP)
- Select parameter HP
- Press the ENTER button, then modify the value of the parameter
by turning the sanitary water temperature selector. The maximum
speed of the fan is linked with the type of gas and the power of
the boiler, table 1
- Turn the sanitary water temperature selector in order to adjust
the set value
- Confi rm the new value you have set by pressing ENTER.
The value indicated on the display is expressed in revs min/100
(example 3600 = 36).
The value set during this operation automatically modifi es the
maximum value of parameter 23.
table 1
MAXIMUM NUMBER OF
FAN REVOLUTIONS
25 B.S.I.
35 B.S.I.
MINIMUM VENTILATOR SPEED (P. LP)
- Select parameter LP
- Press the ENTER button, then modify the value of the parameter
by turning the sanitary water temperature selector. The minimum
speed of the fan is linked with the type of gas and the power of
the boiler, table 2
- Turn the sanitary water temperature selector in order to adjust the
set value
button
- Confi rm the new value you have set by pressing ENTER.
The value indicated on the display is expressed in revs min/100
(example 3600 = 36).
button acts
The value set during this operation automatically modifi es the maxi-
mum value of parameter 24.
table 2
MINIMUM NUMBER OF
button
FAN REVOLUTIONS
25 B.S.I.
35 B.S.I.
VENTILATOR IGNITION SPEED (P. SP)
- Select parameter SP
- Press the ENTER button, then modify the value of the parameter
by turning the sanitary water temperature selector. The standard
slow start value is 3700 revs/min (25 B.S.I.), 3300 revs/min (35
B.S.I.)
- Confi rm the new value you have set by pressing ENTER.
MAXIMUM POWER ADJUSTMENT (P. HH)
- Turn the boiler OFF
- Select the parameter HH and wait for the boiler to come on
- Check that the maximum CO
paragraph "Checking combustion parameters", page 20)
corresponds with the values indicated in table 3.
If the CO proves to comply with the values in the table, proceed to
2
adjust the next parameter (LL - adjusting the minimum), if different
modify the value by turning the
maximum power adjustment screw with a screwdriver (clockwise to
decrease) until you obtain a value contained in table 3.
Maximum power
adjusting screw
Minimum power
adjusting screw
47
EXCLUSIVE BOILER GREEN HE B.S.I.
G20 G31
60 60
60 59
G20 G31
12 19
12 19
reading on the analyser (see
2
revs/min
revs/min
revs/min
revs/min
21