Beretta Exclusive Boiler Green HE 25 B.S.I. Manuel D'installation Et D'utilisation page 196

EXCLUSIVE BOILER GREEN HE B.S.I.
culator, already hydraulically and electrically connected, having the service
performance shown in the graph.
cle every 24 hours of stand-by, with the programme selector in any position.
the mains.
It is absolutely forbidden to switch on the circulator without any water.
ADJUSTABLE SPEED PUMP
The adjustable pump function will only work when the heating programme
is on. The pump is set to maximum speed during the three-way switcho-
ver to the plate-type heat exchanger or boiler (water tank). The adjustable
pump function applies to the boiler pump only and not to any pumps of
external connected devices (e.g. pressure pump).
There are 4 operating modes to choose from, depending on the situation
and type of installation.
Entering parameter 90 in the technical menu you can choose from amongst
these possibilities:
curve to use, based on the instantaneous power supplied by the boiler.
The b oiler controller divides up the power range in which the boiler works
when on heating, into various levels. One of the speeds available in linear
logic: maximum power= high speed, minimum power = low speed, is auto-
matically selected based on the power being used when the heating is on.
Used in all types of installations where the power of the machine is bal-
anced to the effective installation requirements.
Operatively speaking:
- Enter in parameter 90
Values exceeding 41 are only used in special cases
mode (e.g. entering a value of = 10 will change the speed of the circulator to
upstream and downstream).
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
AREA
1.6
MODULATION
PUMP
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0 100 200 300
196
400 500 600 700 800
Capacity (l/h)
The circuit board determines whether to increase or reduce the circulator
- the samples regularly taken by the boiler delivery-return gauge. If sampling
increased if the sample exceeds the set value.
-
Used directly for high temperature installations (typical of replacement)
where the installation does not use a thermostat and where you can set a
The average temperature of the radiators tends to increase when working
at a continual delivery temperature and once the set room temperature has
changing the working curve, you will have a lower return temperature fos-
Operatively:
- Enter in parameter 90
(normally between 10 and 20)
The adjustable circulator works continually at maximum speed in this mode.
Used for installations with high load loss where it is necessary to exploit the
rate at a maximum speed of less than 600 litres/hour).
downstream.
Operatively:
- Enter in parameter 90
This mode must be used in special cases where a standard circulator, not
with variable speed, is preferred in the boiler. It is presumed that the vari-
able speed circulator has been removed and replaced with a non-variable
nector must be removed and replaced with a connector and jumper wired to
the same CN9 connector. The latter wiring is essential and the system could
suffer from malfunctions without doing this.
Operatively.
- Enter into parameter 90
(radiators)
LOW
900 1000
YES
AREA
MODULATION
PUMP
Capacity (l/h)
-
NO