Serial Number Plate - Beretta EXCLUSIVE GREEN HE 25 B.S.I. Installer And User Manual

EXCLUSIVE BOILER GREEN HE B.S.I.
IF A PROGRAMMABLE TIMER IS CONNECTED TO THE
BOILER, SET PARAMETER 51 = 1 (graph 3).
When the contact is closed, the heat request is made by the
delivery probe on the basis of the external temperature in order
to maintain the rated ambient temperature at the DAY level (20
°C). When the contact opens, it does not stop the heat request but
reduces (parallel shift) the temperature curve to the NIGHT level
(16 °C). Though delivery temperature is automatically calculated
by the boiler, the user may manually override it.
By modifying HEATING on the user interface, the HEATING SET
POINT will no longer be available but just a value that can be set
from +5 to –5°C as required.
Modifications to this value do not directly change delivery
temperature but affect the calculation made to automatically
determine its value by modifying the reference temperature of the
system (0 = 20 °C for DAY level; 16 °C for NIGHT level).
CONNECT AT/BT
In case of using CONNECT AT/BT, accessory supplied on request,
the boiler gives the possibility to choose 2 thermoregulation curves:
- OTC 1 CH (parameter 45) for a direct system
- OTC 2 CH (parameter 47) for a mixed system.
Even in case of second circuit (2CH) the curve depends on the
external minimum project temperature (on the geographical area,
therefore) and on the delivey project temperature (on the type of
system, therefore); the installer must to put attention to calculate
it using the following formula:
rated delivery T - 20
P. 47 = 10 x
20- rated min. external T
Parameters 31 and 32 give the possibility to defi ne the maximum
and the minimum central heating set-point of the second circuit.
To correct the curve in this confi guration, please refer to the
instructions supplied with the accessory.

15 - SERIAL NUMBER PLATE

DHW operation
CH operation
Qn nominal capacity
Pn nominal power
IP protection level
P. min minimum pressure
Pmw DHW maximum pressure
Pms CH maximum pressure
T temperature
η working effi ciency
D specifi c capacity
NOx NOx value class
20
GRAPH 1
THERMOREGULATION CURVES
100
90
80
70
60
50
40
30
20
20 15 10 5
EXTERNAL TEMPERATURE (°C)
P21 = MAXIMUM HEATING SET POINT
P22 = MINIMUM HEATING SET POINT
GRAPH 2
TEMPERATURE CURVE CORRECTION
90
80
70
60
50
40
30
+ 5 C
0 C
20
- 5 C
10
30 25 20 15 10
EXTERNAL TEMPERATURE (°C)
GRAPH 3
PARALLEL NIGHT REDUCTION
90
80
DAY
70
temperature curve
Curva climatica GIORNO
60
50
40
30
20
10
20 15 10
EXTERNAL TEMPERATURE (°C)
40 37,5 35 32,5 30 27,5 25 22,5
0 -5 -10 -15
5 0 -5 -10
NIGHT
Curva climatica NOTTE
temperature curve
5 0 -5 -10 -15
20
17,5
15
P. 21
12,5
10
7,5
5
2,5
P. 22
-20
-15 -20
-20