Beretta EXCLUSIVE BOILER GREEN HE 25 B.S.I. Manual Para El Instalador Y El Usuario página 20

EXCLUSIVE BOILER GREEN HE B.S.I.
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
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
temperature
These two parameters limit the delivery temperature automatically
produced by the TEMPERATURE CONTROL function. PARAMETER
21 determines MAXIMUM DELIVERY TEMPERATURE (MAXIMUM
POINT).
The connected external temperature probe combined with
PARAMETER 44 provides the following operating modes:
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.
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
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.
the following parameters:
a 19
b 20
c 19
d 18
c
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
P. 45 = 10 x
20- rated min. external T
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.
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
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).
14 12
16 15
15 14
12 10
d
types of building
rated delivery T - 20
8
11
9
5