Beretta C.A.I 24 Manual De Instalacion Y Uso página 19

Switching on
Switch on the boiler as follows:
- access the gas tap through the slots in the cover located in the
lower part of the boiler
- open the gas tap by turning it anti-clockwise (fi g. 47)
- power the boiler.
open
position
Fig. 47
When powered, the boiler performs a test sequence and a series
of numbers and letters are shown on the display.
If the test is successful the boiler is ready to work about 4 seconds
after the cycle ends.
The display will look like fi g. 48.
If the test is unsuccessful, the boiler will not work and a "0" will fl ash
on the display.
In this case, contact the Technical Assistance Centre.
Fig. 48
The boiler turns on in the status it was in before it was switched
off: if the boiler was in the winter mode when it was switched
off, it will turn on again in the winter mode. If it was in the OFF
mode, the display will show two segments in the central area
(fi g. 49). Press the button to enable operation.
Fig. 49
Choose the desired operating mode by pressing
until the symbol moves to:
WINTER
SUMMER
WINTER function (fi g. 50)
With the selector in this position, the boiler provides hot water for
the heating and, if an external water tank is connected, provides
water to the water tank to allow domestic hot water preparation.
Function S.A.R.A Booster is enabled in this position (see chapter
"Boiler functions").
Fig. 50
SUMMER function (only with external water tank connected,
fi g. 51)
With the selector in this position, the boiler provides water to the
water tank with a temperature stabiliser to allow domestic hot water
preparation.
Fig. 51
Adjusting heating water temperature
Turning the selector A (fi g. 52), after having positioned the selector
mode on winter
temperature.
Turn clockwise to increase the temperature and anticlockwise to
decrease. The bar segments light up (every 5°C) as the temperature
is increased. The selected temperature value appears on the display.
A
Fig. 52
Adjusting heating water temperature with an external sensor
connected
When an external probe is connected, the value of the delivery
temperature is automatically chosen by the system which rapidly
adjusts ambient temperature to the changes in external temperature.
Just the central segment of the bar is illuminated (fi g. 53).
To increase or decrease the temperature with respect to the value
automatically calculated by the electronic board, turn the heating
water selector clockwise to increase and anticlockwise to decrease.
The bar segments light up (at every comfort level), correction toleran-
ce lies between - 5 and + 5 comfort levels (fi g. 53). When choosing
the level of comfort, the digit area of the display shows the required
level of comfort while the bar shows the matching segment (fi g. 54).
°C
+ 4/5
+ 3
+ 2
+ 1
0
- 1
- 2
- 3
- 4/5
button,
Fig. 53
Adjusting domestic hot water temperature
CASE A only heating - adjusting not applicable
CASE B only heating + water tank with thermostat: in this
condition every time there is a request from the water
tank thermostat, the boiler supplies hot water to
preparing domestic hot water. During this operation on
the display the icon
CASE C only heating + water tank with sensor: to adjust domestic
hot water temperature storaged in the water tank, turn
switch D (fi g. 55): clocwise to increase and anticlockwise
to decrease. The bar segments light up (every 3°C) as
the temperature is increased. About 4 seconds after the
selection has been made, the modifi cation is memorised
and the display returns to the delivery temperature read
by the sensor.
Fig. 55
19
, it is possible to regulate the heating water
Fig. 54
fl ashed.
D