Combustion Check - Riello Start Condens 25 Manuel D'installation Et D'utilisation

• Unscrew the instrument panel fixing screws (B - fig. 10)
• Turn the instrument panel forward
• Undo by two turns the screw of the pressure test point upstream
from the gas valve (C - fig. 17) and connect the pressure gauge
• Power the boiler electrically by setting the main system switch
to "ON"
• Bring the mode selector to summer
• Turn the DHW temperature selector to maximum
• Fully open the hot water tap
• With the burner at maximum output, check that the gas pressure
is comprised between the minimum and rated power supply pres-
sure values indicated in the multigas table
• Turn off the hot water tap
• Disconnect the pressure gauge and tighten the pressure test point
screw again upstream from the gas valve.

Combustion check

To carry out the combustion analysis, proceed as follows:
• Set the main system switch to OFF
• Unscrew the housing fixing screws (A - fig. 9)
• move the housing base forwards and then upwards to unhook it
from the frame
• Unscrew the instrument panel fixing screws (B - fig. 10)
• Rotate the control panel towards you
• Unscrew the fixing screws (C - fig. 11) to access the terminal board
• Press the "CO" button once using the supplied screwdriver (fig. 16)
9 Live electrical parts.
• Wait for the burner to fire. "ACO" is displayed and the boiler oper-
ates at the maximum heating output
• Remove the screw and the cover on the air distribution box
• Insert the analysis probe adapter, found in the documentation en-
velope, into the hole for the combustion analysis
• Insert the flue gases analysis probe inside the adaptor
• Check that the CO values correspond to those indicated in the
2
"Multigas" table, if the value displayed is different, modify as indi-
cated in chapter "gas valve calibration.".
• Perform the combustion check.
Then:
• Remove the analyser probe and close the combustion analysis
sockets with the screw
• Close the instrument panel and reposition the cover
9 The flue gas analysis probe should be inserted until its reaches
the stop.
9 Even during the combustion analysis phase, the function that
switches the boiler off when the water temperature reaches the
maximum limit (about 90°C) remains enabled.
When checks are completed:
• Position the mode selector depending on the operating mode desired
• Adjust the selectors (2 and 3) according to the client's requirements.
9 START CONDENS Kis boilers are intended for use with meth-
ane gas (G20) and are already factory set as specified on the
rating plate, so do not require any calibration.
9 All checks must be carried out exclusively by the Technical As-
sistance Service .
2.14 - 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.
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 JP6
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 con-
tact does not produce a switch-off, but a reduction (parallel trans-
lation) 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 automatically
affect the calculation that determines the value of that temperature,
altering the reference temperature in the system (0 = 20°C for DAY
level, and 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
(jumper pos. 1 inserted).
27
CURVE DI TERMOREGOLAZIONE
3,0 2,5
5 0 -5 -10
Temperatura esterna (˚C)
Outside temperature (°C)
ENGLISH
2,0
1,5
1,0
0,8
0,6
0,4
0,2
-15 -20