Beretta Exclusive 24 C.A.I. Installer And User Manual page 16

ENGLISH
12 - ADJUSTMENTS
The boiler has already been factory adjusted by the manufacturer.
For LPG gas: the boiler has been regulated in I3B/P category (G30).
If you need to regulate in I3+ or I3P categories (G31) exclude
pressure regulator.
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
qualified staff.
- unscrew the lower cover fixing screw (C, fig. 3c)
- Pull the cover towards you and remove (A-B) (fig. 4a)
- Loosen the two fixing screws (D) and remove the shell (fig. 3a)
- 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
- Carefully prise out the cap protecting the adjustment screws
with a screwdriver
CALIBRATION & SERVICE operations must be performed
with the boiler in the OFF position. To do this, press the
button until the display shows "- -" (fig. 40).
During parameter modification operations, the "select fun-
ctions" button acts as an ENTER (confirm) button, the but-
ton acts as an ESCAPE button. If no confirmation 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 fig. 41.
Enter the password for accessing the parameter modifications
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.
Confirm by pressing ENTER.
Calibration phases
Turn the domestic hot water selector to sequentially scroll the CA-
LIBRATION & SERVICE phases:
- 1 gas type
- 10 domestic hot water mode (parameter not used in this phase)
- 3 i nsulation level of building (only if external sensor is con-
nected)
- 45 i nclination of thermoregulation curve (OTC), only if external
sensor is connected)
- HH boiler at maximum power
- LL boiler at minimum power
- 23 maximum heating adjustment possibility
- 24 minimum heating adjustment possibility.
The parameters must be modified, by professionally
qualified personnel, only if absolutely necessary. The
manufacturer refuses any responsibility in the case of
incorrect setting of the parameters.
GAS TYPE (P. 1)
Modify the set value as follows:
- press ENTER to access the parameter modification function.
When ENTER is pressed, the previously set value starts flash-
ing (fig. 43)
- turn the domestic hot water temperature selector to change the
value (1 MTN - 2 LPG)
- press ENTER to confirm the new value. The digits stop flashing.
MAXIMUM POWER ADJUSTMENT (P. HH)
- Turn the domestic hot water temperature selector till HH is
shown
- Use a fork spanner CH10 to turn the maximum power to the
value indicated in the multigas table
- Wait for the pressure on the pressure gauge to stabilise at the
required value.
MINIMUM POWER ADJUSTMENT (P. LL)
- Turn the domestic hot water temperature selector till LL is shown
- Taking care not to press on the inner shaft, turn the red do-
mestic hot water minimum adjustment screw with a screw-
driver until the pressure gauge reads the value indicated in the
multigas table.
MAXIMUM HEATING ADJUSTMENT POSSIBILITY (P. 23)
Check that the pressure read on the pressure gauge corresponds
to that shown on the multigas table.
If it does not, carry out the adjustment operations described below:
- turn the domestic hot water temperature selector till 23 is shown.
Wait for the boiler to start
- press ENTER to access the parameter modification function
- turn the domestic hot water selector until the pressure gauge
corresponds to that indicated in the multigas table
Fig. 77
MINIMUM HEATING ADJUSTMENT POSSIBILITY (P. 24)
Check that the pressure read on the pressure gauge corresponds
to that shown on the multigas table.
If it does not, carry out the adjustment operations described below:
- turn the domestic hot water temperature selector till 24 is shown.
button
Wait for the boiler to start
- press ENTER to access the parameter modification function
- turn the domestic hot water selector until the pressure gauge
corresponds to that indicated in the multigas table
- press ENTER to confirm the new value.
Exit the CALIBRATION & SERVICE function by pressing ESCAPE.
Fig. 78
The boiler returns to the "- -" (OFF) status.
To reset, press the
- Disconnect the pressure gauge and tighten the pressure tap
screw.
After adjusting the gas valve, seal it with sealing wax.
After making adjustments:
- return the temperature set with the ambient thermostat to the
required position
- close the panel
- put back the shell.
16
button.