Setting The Thermoregulation; Type Of Building; Enable Thermoregulation Function; Type Of Heat Request - Beretta EXCLUSIVE GREEN HE C.S.I. Installer And User Manual

16 - SETTING THE THERMOREGULATION

Checking the connection with the external probe
After connecting the external probe to the boiler, use the INFO function to check that the probe has been automatically recognised by the temperature
control card. Immediately after installation, the value read by the probe may very well be higher then that measured by a reference probe.
Enable and optimise the THERMOREGULATION function by setting the following parameters:
PARAMETER

TYPE OF BUILDING

MAXIMUM HEATING SET POINT
MINIMUM HEATING SET POINT

ENABLE THERMOREGULATION FUNCTION

OFFSET TEMPERATURE CURVE

TYPE OF HEAT REQUEST

To access the programming mode, consult "Programming parameters".
PARAMETER 03. Type of building
In order to calculate delivery temperature, the temperature control system
does not directly use the external temperature value but considers the heat
insulation of the building: in well-lagged buildings, external temperature
variations affect the ambient temperature less than they do in badly-lagged
buildings. Use parameter 3 to set the heat insulation level of the building
according to the following scheme:
Type of building
A
B
New Old
houses houses
A 19
B 20
C 19
D 18
PARAMETERS 21 and 22. Maximum and minimum delivery
temperature
These two parameters limit the delivery temperature automatically produced
by the TEMPERATURE CONTROL function. PARAMETER 21 determines
MAXIMUM DELIVERY TEMPERATURE (MAXIMUM HEATING SET POINT)
while PARAMETER 22 determines MINIMUM DELIVERY TEMPERATURE
(MINIMUM HEATING SET POINT).
PARAMETER 44. Enable thermoregulation function
The connected external temperature probe combined with PARAMETER 44
provides the following operating modes:
EXTERNAL PROBE CONNECTED and PARAMETER 44 = 0 (OFF) in this
case the TEMPERATURE CONTROL function is disabled even though the
external probe is connected. The temperature read by the external probe
can always be viewed by pressing the INFO button. The TEMPERATURE
CONTROL symbols are not displayed.
EXTERNAL PROBE CONNECTED, PARAMETER 44 = 1 (ON) in this case
the TEMPERATURE CONTROL function is enabled. The temperature read
by the external probe and the TEMPERATURE CONTROL symbols can be
viewed by pressing the INFO button.
The TEMPERATURE CONTROL function cannot be enabled unless the
external probe has been fitted and connected. In this case, PARAMETER
44 is ignored and has no effect on boiler operation.
PARAMETER 45. Choosing the offset temperature curve (graph 1)
The offset heating curve maintains a theoretical ambient temperature of
20°C at external temperatures ranging from +20°C to -20°C. The choice of
the curve depends on the rated minimum external temperature (on the ge-
ographical area, therefore) and the rated delivery temperature (on the type
of system, therefore) and must be carefully calculated by the fitter using the
following formula:
P. 45 = 10 x
C
Hollow Solid
bricks bricks
14 12
16 15
15 14
12 10
rated delivery T - 20
20- rated min. external T
AVAILABLE IN THE PROGRAMMING MODE
3 INSTALLATION AND CALIBRATION & SERVICE
21 INSTALLATION
22 INSTALLATION
44 INSTALLATION
45 INSTALLATION AND CALIBRATION & SERVICE
51 INSTALLATION
If, from your calculations, you obtain an intermediate value between two
curves, we suggest choosing the compensation curve closest to the value
obtained.
Example: if the value obtained from the calculations is 8, this is between
curve 7.5 and curve 10. In this case, choose the closest curve, which is 7.5.
PARAMETER 51. Type of heat request
IF AN AMBIENT THERMOSTAT IS CONNECTED TO THE BOILER, SET
PARAMETER 51 = 0 (graph 2).
The ambient thermostat makes a heat request when its contact closes, while
it stops it when its contact opens. Though delivery temperature is automati-
cally 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. Modi-
fications 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).
D
For boilers fitted with the S.A.R.A. Function, if the AMBIENT THERMOSTAT
remains closed for a long time, the boiler automatically increases the delivery
temperature which is added to the effect of the temperature control function.
When the AMBIENT THERMOSTAT opens, the boiler automatically returns
Stones
to the value determined by the TEMPERATURE CONTROL function.
8
IF A PROGRAMMABLE TIMER IS CONNECTED TO THE BOILER, SET
11
PARAMETER 51 = 1 (graph 3).
9
When the contact is closed, the heat request is made by the delivery probe on
5
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
P. 47 = 10 x
must to put attention to calculate it using the following formula:
Parameters 31 and 32 give the possibility to define the maximum and the
minimum central heating set-point of the second circuit.
To correct the curve in this configuration, please refer to the instructions
supplied with the accessory.
rated delivery T - 20
20- rated min. external T
ENGLISH
23