Beretta Ciao 25C User Manual

11
> 2 sec
MAX
MIN
+
Co
---
006
.
rpm
006
.
rpm
or
fan speed
in CH
The displayed value refers to the number of revolutions divided by 100.
 Set the maximum rpm value.
007
.
rpm
007
.
rpm
confirm
MAX
rpm
The boiler works at the maximum power level.
 Check the analyser to ensure the max CO2 value complies with the indica-
tiongiveninthetable.Ifthevalueisdifferent,calibratethegasvalve-see
paragraph “3.10 Gas valve calibration” .
table 1
CO2 max
METHANE
GAS (G20)
LPG
(G31)
25C f 9,0 10,0 %
30C f 9,0 10,0 %
 Set the minimum rpm value
016
.
rpm
016
.
rpm
confirm
MIN
rpm
The boiler works at the minimum power level.
 Check the analyser to ensure the min CO2 value complies with the indica-
tiongiveninthetable.Ifthevalueisdifferent,calibratethegasvalve-see
paragraph “3.10 Gas valve calibration ” .
table 2
CO2 min
METHANE
GAS (G20)
LPG
(G31)
25C f 9,0 10,0 %
30C f 9,0 10,0 %
After completing the check:
 quit the function by pressing
056
.
rpm
exit function
 reposition the previously removed components
 settheboilertotherequiredoperatingmode,dependingontheseason
 r egulate the heat request temperature values according to the customer’s
needs .
b
Whenthecombustionanalysisfunctionisactive,allheatrequestsare
inhibited and the message “CO” appears on the display.
IMPORTANT
The combustion analysis function is active for max. 15 minutes; the burner
shuts down if a delivery temperature of 95°C is reached. It will ignite again when
the temperature falls below 75°C.
b
The combustion analysis function is usually carried out with the 3-way
valve on heating. The 3-way valve can be switched to DHW by genera-
ting a DHW request at the maximum output while the function itself is still
active.Inthiscase,theDHWtemperaturewillbelimitedtoamaximum
value of 65°C. Wait for the burner to fire .
3.9 Adjustments
The boiler has already been adjusted by the manufacturer. If the adjustments
needtobemadeagainhowevere.g.followingextraordinarymaintenance,after
the replacement of the gas valve , after conversion from methane gas to LPG
or vice versa ,orafteranewregulationforinside-chimneypipes, follow the
procedures described below .
Theadjustmentofthemaximumandminimumoutput,maximumheatingandslow
ignitionmustbemadeinthesequenceindicated,andbyqualifiedpersonnelonly :
 power up the boiler
 set the parameters
306 minimum fan speed
307 maximum fan speed
308 slow ignition
309 maximum fan speed for heating
table 3
MAX. NO. FAN
ROTATIONS
METHANE GAS
(G20)
LPG
(G31)
25C f CH - DHW 7.000-8.700 6.900-8.500 rpm
30C f CH - DHW 7.400-8.700 7.400-8.700 rpm
table 4
MIN. NO. FAN
ROTATIONS
METHANE GAS
(G20)
LPG
(G31)
25C f 1.500 2.050 rpm
30C f 1.500 1.700
rpm
table 5
NO. FAN ROTATIONS
SLOW IGNITION
METHANE GAS
(G20)
LPG
(G31)
25C f - 30C f
5.500 5.500 rpm
3.10 Gas valve calibration
Run the CO2 check procedure as explained in paragraph “3.8 Combustion
analysis”.Ifthevaluesneedtobemodified,proceedasfollows :
 check the CO2 adjustment values with the casing closed
 remove the casing as explained in paragraph “2.5 Removing the casing”
 check the CO2adjustmentvaluesagain,withthecasingopen
 onthebasisofthedifferenceinvalueswiththecasingclosedandopen,if
necessary bring the CO2 to the value shown in the table (1 and 2) - (minus)
the difference found. Example :
 CO2 value measured with the casing closed =8,5%
 CO2 value measured with the casing open =8,3%
 value to be set for CO2 with the casing open =8,8%
 value to be set for CO2 with the casing closed =9,0%
 t o adjust the CO2 value :
 rotate the max. power adjustment screw clockwise to reduce the value,
or anti-clockwise to increase it
 r otate the min. power adjustment screw clockwise to increase the value,
or anti-clockwise to reduce it
 with the casing open and after adjusting the CO2 value at the minimum
power,checktheadjustmentoftheCO2 at the maximum power again
 aftercompletingtheadjustments,replacethe casingand checkthe CO2
corresponds to the value shown in the table 1 and 2 .
CO2 -
CO
2 +
Maximum output
adjustment screw
Maximum output
adjustment screw
3.11 Gas conversion
Conversion from the gas of one family to the gas of another family can be
done easily even when the boiler is already installed.
This operation must be carried out by professionally qualified personnel. The
boiler is designed to operate with methane gas (G20) or LPG (G31) according
to the product label. The boiler can be transformed to LPG or to methane gas
(G20) by means of special kits.
For disassembly refer to instructions below:
 disconnect the boiler from the electricity supply and turn off the gas tap
 remove the casing as explained in paragraph “2.5 Removing the casing”
 release the instrument panel and rotate it forwards
 unscrew the ramp nut from the gas valve and rotate the ramp so as to have
access to the gas nozzle (B) in the outlet fitting
 remove the nozzle (B) and replace it with the one from the kit

Beretta Ciao 25C Specifications

General

Brand	Beretta
Model	Ciao 25C
Category	Boiler
Language	English