Riello 47-364-52, User Instructions

Page: 40 / 55

40
table 2
MIN RPM FAN
SPEED
NATURAL GAS
(G20)
LPG
(G31)
25C
1.400 1.400 rpm
30C 1.400 1.400 rpm
table 3
SOFT IGNITION
NATURAL GAS
(G20)
LPG
(G31)
25C - 30C
4.000 4.000 rpm
ƒ
confirm values with
Enter
.
8.10 GAS VALVE CALIBRATION
Perform the CO2 verification procedure as indicated in para-
graph “8.3.1 Combustion check”, if it is necessary to modify
the values, proceed as follows:
ƒ
turn clockwise on the maximum power adjustment screw to
decrease the value
ƒ
turn the minimum power adjustment screw clockwise to in-
crease the value.
Fig. 46
CO
2
-
CO
2
+
Min power
adjustment screw
Max power
adjustment screw
8.11 RANGE RATED
This boiler can be adapted to the heating requirements of the
system, in fact it is possible to set the maximum delivery for
heating operation of the boiler itself:
ƒ
power up the boiler
ƒ
access the technical parameters menu, as indicated in the
paragraph “ 5.1 Access to the parameters”
ƒ
select the P3 menu and confirm the selection with
ƒ
the display shows P3.10, enter the sub-menu by pressing
ƒ
set the maximum desired heating value (rpm) with the
and keys, confirming the selection with
Enter
ƒ
once the required output has been set (maximum heating),
put the value on the self-adhesive label on the back cover
of this manual. For subsequent controls and adjustments,
refer to the set value.
b
The calibration does not entail the ignition of the boiler.
The boiler is delivered with the adjustments shown in the
technical data table.
Depending on plant engineering requirements or regional
flue gas emission limits it is, however, possible to modify this
value, referring to the following graphs.
After setting the desired output report the value in
the table on the back cover of this manual, for future
references.
1200
1600
2000
2400
2800
3200
3600
4000
4400
4800
5200
5600
6000
6400
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
Gi
ri
ve
n
�
la
to
re
(r
.p
.m
.)
Portata termica (kW)
Curva portata termica - giri ven � latore
Caldaia Vision PLUS 25C
Qm
Qn
RANGE RATED
HTG curve -
VISION PLUS
25C
heat output (kW)
fan rotations (r
.p.m.)
heat output (kW)
fan rotations (r
.p.m.)
HTG curve - VISION PLUS 30C
1200
1600
2000
2400
2800
3200
3600
4000
4400
4800
5200
5600
6000
6400
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
G
iri
v
en
�
la
to
re
(r
.p
.m
.)
Portata termica (kW)
Curva portata termica - giri ven � latore
Qm
Qn
RANGE RATED
8.12 SETTING THE THERMOREGULATION
Enabling THERMOREGULATION occurs in the following way:
ƒ
access the technical parameters menu, as indicated in the
paragraph “ 5.1 Access to the parameters”
ƒ
select the menu P4 and then P4.18 = 1.
Thermoregulation only works with the outdoor temperature
sensor connected and active only for the HEATING function.
If P4.18 = 0 or outdoor temperature probe disconnected the
boiler operates at a fixed point. The temperature measured
by the outdoor temperature sensor is displayed in “8.15 INFO
menu” under I0.09. The thermoregulation algorithm will not
directly use the outdoor temperature, but rather a calculated
outdoor temperature that takes into account the building’s
insulation: in buildings that are well insulated, the outdoor
temperature variations will have less impact than those that are
poorly insulated by comparison.
REQUEST FROM OT CHRONOTHERMOSTAT
In this case the delivery setpoint is calculated by the
chronothermostat according to the outdoor temperature value
and the difference between the ambient temperature and the
desired ambient temperature.
REQUEST FROM ROOM THERMOSTAT
In this case the delivery setpoint is calculated by the adjustment
board according to the outdoor temperature value so as to
obtain an estimated outdoor temperature of 20° (reference
ambient temperature).
There are 2 parameters that compete to calculate the output
setpoint:
ƒ
slope of the compensation curve (KT)
ƒ
offset on the reference ambient temperature.