Beretta Exclusive Boiler Green HE 25 B.S.I. Manuel D'installation Et D'utilisation page 20

EXCLUSIVE BOILER GREEN HE B.S.I.
14 - 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
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:
a
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.
20
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:
AVAILABLE IN THE PROGRAMMING MODE
3 INSTALLATION AND CALIBRATION & SERVICE
21 INSTALLATION
22 INSTALLATION
44 INSTALLATION
45 INSTALLATION AND CALIBRATION & SERVICE
51 INSTALLATION
a
b
c
d
b
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 geographical 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:
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 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).
New houses
Hollow bricks
19 14
20 16
19 15
18 12
c
rated delivery T - 20
P. 45 = 10 x
20- rated min. external T
Old houses
Solid bricks Stones
12
15
14
10
d
types of building
8
11
9
5