Adjustments - Riello Start Condens 25 IS Manuel D'installation Et D'utilisation

START CONDENS 25 IS
2.15 - Setting the thermoregulation
Thermoregulation only works with external sensor connected, so
once installed, connect the outdoor probe - accessory on request -
to the appropriate connections provided on the terminal board of the
boiler. This will enable the THERMOREGULATION function.
Choice of the compensation curve
The compensation curve for heating maintains a theoretical temper-
ature of 20°C indoors, when the external temperature is between
+20°C and -20°C. The choice of the curve depends on the minimum
external temperature envisaged (and therefore on the geographical
location), and on the delivery temperature envisaged (and therefore
on the type of system). It is carefully calculated by the installer on the
basis of the following formula:
T.outlet envisaged - Tshift
KT=
20 - min. design external T
Tshift = 30°C standard system
25°C floor installations
If the calculation produces an intermediate value between two
curves, you are advised to choose the compensation curve nearest
the value obtained.
Example: if the value obtained from the calculation is 1.3, this is
between curve 1 and curve 1.5. Choose the nearest curve, i.e. 1.5.
The selection of the KT should be carried out by acting on trimmer
P3 on the board (see Multi-row wiring diagram).
To access P3:
• Remove the housing
• Undo the fixing screw of the instrument panel
• Turn the control panel towards you
• Undo the fixing screws of the terminal board cover
• Unhook the board cover
9 Live electrical parts (230 Vac).
The settable KT values are as follows:
• standard system: 1.0-1.5-2.0-2.5-3.0
• floor installation 0.2-0.4-0.6-0.8
• and appear on the display for a duration of about three seconds
after the rotation of trimmer P3.
Type of heat request
If the boiler is connected to a ambient thermostat (JUMPER 6
not included)
The heat request is made by the closure of the room thermostat
contact, while the opening of the contact produces a switch-off.
The delivery temperature is automatically calculated by the boiler,
although the user may interact with the boiler. Using the interface to
modify the HEATING, you will not have the HEATING SET-POINT
value available, but a value that you can set as preferred between
15 and 25°C. The modification of this value will not directly modify
the delivery temperature, but will automatically affect the calculation
that determines the value of that temperature, altering the reference
temperature in the system (0 = 20°C).
If the boiler is connected to a timer (JUMPER JP6 inserted)
With the contact closed, the heat request is made by the delivery
probe, on the basis of the external temperature, to obtain a nominal
ambient temperature on DAY level (20°C). The opening of the
contact does not produce a switch-off, but a reduction (parallel
translation) of the climatic curve on NIGHT level (16°C). The
night-time mode is active in this way. The delivery temperature is
automatically calculated by the boiler, although the user may interact
with the boiler.
Using the interface to modify the HEATING, you will not have the
HEATING SET-POINT value available, but a value that you can set
as preferred between 15 and 25°C. The modification of this value
will not directly modify the delivery temperature, but will automatical-
ly affect the calculation that determines the value of that tempera-
ture, altering the reference temperature in the system (0 = 20°C for
DAY level; 16°C for NIGHT level).
Different curves can be selected depending on the experience of
the installer.
Thermoregulation curves
The display shows the value of the curve multiplied by 10 (e.g..
3.0 = 30)
100
90
T80
80
70
60
50
T45
40
30
20
20 15 10
T80 - std heating system maximum setpoint temperature (jumper
pos. 1 not inserted).
T45 - floor heating system maximum setpoint temperature (jump-
er pos. 1 inserted).
Climatic curve correction
90
80
70
60
50
40
30
25 ° C
20 °C
20
10
30 25 20
Parallel night-time reduction
90
Daytime temperature
80
curve
70
Curva climatica GIORNO
60
50
40
30
20 °C
20
16 °C
10
20 15 10

3 - Adjustments

START CONDENS IS boilers are intended for use with methane gas
(G20) and are already factory set as specified on the rating plate.
If adjustments have to be redone, for example after extraordinary
maintenance, after the gas valve replacement or after conversion
from methane gas to LPG and vice versa, the following procedures
must be followed.
9 The adjustment of the maximum and minimum output, and slow
ignition, must be made in the sequence indicated, and by quali-
fied personnel only.
• Disconnect the power supply to the boiler
• Turn the heating water temperature selector to its maximum
• Unscrew the fixing screws of the hatch on the terminal board cover
• Insert jumpers JP1 and JP3
• Power up the boiler
• The display shows "ADJ" for about 4 sec.
24
CURVE DI TERMOREGOLAZIONE
3,0 2,5
5 0 -5 -10
Outside temperature (°C) Temperatura esterna (˚C)
15 °C
15 10 5 0 -5 -10
Outside temperature (°C)
Riduzione notturna PARALLELA
Curva climatica NOTTE
Night-time temperature
curve
5 0 -5 -10
Temperatura Esterna
Outside temperature (°C)
2,0
1,5
1,0
0,8
0,6
0,4
0,2
-15 -20
-15 -20
-15 -20