Beretta Exclusive Green E C.S.I. Serie Manual Del Instalador página 7

VARIABLE SPEED CIRCULATION UNIT
The modulating circulating function is only active for the heating function.
When switching the three ways on the plate heat exchanger, the circulator
is set at maximum speed. The modulating circulation function applies
only to the boiler circulator and not to circulators on any external devices
connected to it (e.g. booster circulator).
Any of 4 operating modes can be chosen, depending on situations and
the type of plant.
By accessing parameter 90 in the technical menu, one of the following
possibilities can be chosen:
1 - VARIABLE SPEED CIRCULATOR WITH PROPORTIONAL MODE
(60 <= P90 <= 100)
2 - VARIABLE SPEED CIRCULATOR WITH CONSTANT ∆T MODE
(2 <= P90 <= 40)
3 - VARIABLE SPEED CIRCULATOR WITH MAXIMUM FIXED SPEED
MODE (P90 = 1)
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATOR WITHOUT
SPEED ADJUSTMENT (P90 = 0)
The factory configuration is with P 90 = 60 (pump in proportional mode
with wide modulation).
1 - VARIABLE SPEED CIRCULATOR WITH PROPORTIONAL MODE
(60 <= P90 <= 100)
In this mode the boiler's board determines what flow rate curve to adopt
according to the instantaneous power supplied by the boiler.
The boiler controller breaks down the power range within which the
boiler operates in heating mode into various levels. Depending on the
power level in use when heating, one of the speeds available is selected
automatically according to a linear logic: Maximum power = high speed,
minimum power = low speed.
This is used on all types of plants where the machine's power has been
correctly balanced with the plant's real needs.
If you need to reduce the range of modulation (increase the minimum
flow rate of the pump) set values greater than 60.
Operationally:
- Access parameter 90
- Set the parameter = 60
2 - VARIABLE SPEED CIRCULATION UNIT WITH CONSTANT ∆T
MODE (2 <= P90 <= 40)
In this mode the installer sets the ∆T value to be maintained between
the delivery and return (e.g. if a value of 10 is entered, the circulator's
speed will change to implement a plant flow rate aimed at maintaining the
∆T between upstream and downstream of the heat exchanger at 10°C).
By periodically sampling the values provided by the boiler delivery/return
sensors, the board increases or decreases the circulator's speed and
therefore the plant's flow rate. If the sampling shows a ∆T value lower
than that set, the speed is reduced until the ∆T increases to the value
set. Vice-versa is sampling is higher than the value set, the speed is
increased.
This is used for direct high temperature plants (typical of replacement),
where the boiler is not thermostatically controlled, and where a calculated
∆T can be set.
When working with a constant delivery temperature and attainment
of stabilising the ambient conditions, the average temperature of the
radiators tends to increase. By keeping ∆T constant, the reduction in the
flow rate is obtained by changing the operating curve, which produces
a lower return temperature that in turn favours high boiler performance
and the reduction of electricity consumption.
Operationally:
- Access parameter 90
- Set the parameter with a value between 2 and 40 (usually between
5 and 7 for low temperature installation and between 15 and 20 for
high temperature installation).
3 - VARIABLE SPEED CIRCULATOR WITH MAXIMUM FIXED SPEED
MODE (P90 = 1)
In this mode the modulating circulator works constantly at maximum
speed.
It is used on plants with a high load loss in which the boiler's head must
be used as much as possible in order to guarantee sufficient circulation
(plant flow rate at maximum speed lower than 600 litres per hour).
This is used when bottles of mixture are involved, with high flow rates
in the circuit downstream.
Operationally:
- Access parameter 90
- Set the parameter = 1
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATOR WITHOUT
SPEED ADJUSTMENT (P90 = 0)
This mode must be used in exceptional cases in which the boiler is
to be used with a traditional circulator without a speed adjustment. It
presupposes that the adjustable speed circulator has been removed
and replaced with a non-adjustable speed circulator.
b
The BE06 board connected to connector CN9 must be removed
and replaced with a connector with a jumper to be inserted into
connector CN9. This latter connection is obligatory and if not
formed may cause the system to malfunction.
Operationally:
- Access parameter 90
- Set the parameter = 0
CONFIGURATIONS RECOMMENDED BY THE MANUFACTURER
EXTERNAL SENSOR YES
(THERMOREGULATION)
∆T constant
(5 ≤ P90 ≤7)
PROPORTIONAL
(P90 = 60)
PROPORTIONAL
(P90 = 60)
3 - HYDRAULIC CONNECTIONS
Position and dimensions of hydraulic connections are specified in
figure 1.1:
A - CH return
B - CH delivery
C - Gas connection
D - DHW outlet (C.S.I)
E - DHW inlet (C.S.I)
RB - water tank return (R.S.I.)
MB - water tank delivery (R.S.I.)
F - Support plate
G - Pre-installation template
4 - INSTALLING THE EXTERNAL PROBE
The sensor (Fig. 1.6) must be installed on an external wall of the building
you want to heat, while taking care to comply with the instructions below:
- It must be fitted on t facade most often exposed to wind, on a wall
facing NORTH or NORTH-WEST, and taking care to avoid direct
sunlight.
- It must be fitted about 2/3 up the height of the façade.
- It must not be near any doors, windows, outlets for air ducts, or near
chimneys or other heat sources.
The electrical connection to the external sensor must be formed using a
two-pole cable (not supplied), with a cross-section of 0,5 to 1 mm
a maximum length of 30 metres. It is not necessary to worry about the
polarity of the cable for the connection to the external sensor. Do not
form joints in this cable. If a joint has to be made it must be watertight
and adequately protected.
Any conduiting used for the connection cable must be separate from
the conduits used for the power cables (230 Vac).
WALL MOUNTING OF THE EXTERNAL SENSOR.
Install the probe in an area of smooth wall; for brick walls or other irregular
surfaces, prepare a smooth contact area if at all possible.
Remove the upper plastic cover by turning it anti-clockwise.
Identify the wall fixing point and drill a hole for the 5x25 expansion grip.
Insert the expansion grip into the hole.
Remove the card from its housing.
Fix the housing to the wall using the supplied screw.
Attach the bracket and tighten the screw.
ENGLISH
EXTERNAL SENSOR NO
(NO THERMOREGULATION)
PROPORTIONAL
(P90 = 60)
∆T constant
(15 ≤ P90 ≤ 20)
PROPORTIONAL
(P90 = 60)
3/4"
3/4"
3/4"
1/2"
1/2"
3/4"
3/4"
and
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