Baxi Nuvola 3 BS 280 Fi User Manual

46
7113868.01 - en
INSTRUCTIONS FOR FITTERS
The authorised Technical Assistance Service can convert this boiler to natural gas (G. 20) or liquid gas (G. 30, G. 31).
18. GAS CONVERSION
TFDUJPO
r PQFOBIPUXBUFSUBQUIBUDBOQSPWJEFBáPXSBUFPGBUMFBTUMJUSFTBNJOVUFPSNBLFTVSFUIFSFJTNBYJNVNIFBU
EFNBOE
r DIFDLUIBUUIFCPJMFSGFFEJOHEZOBNJDQSFTTVSFBTNFBTVSFEBUUIFJOMFUHBTWBMWFQSFTTVSFUFTUQPJOU1B'JHVSFB
is correct (30 mbar for butane gas, 37 mbar for propane gas or 20 mbar for methaneHBT
r SFNPWFUIFNPEVMBUPSDPWFS
r BEKVTUUIFUVCFCSBTTTDSFXUPPCUBJOUIFQSFTTVSFTFUUJOHTTIPXOJOUBCMF
C2) Adjustment to reduced heat output:
r
EJTDPOOFDUUIFNPEVMBUPSGFFEJOHDBCMFBOEVOTDSFXUIFTDSFXUPSFBDIUIFQSFTTVSFTFUUJOHDPSSFTQPOEJOHUPSFEVDFE
IFBUPVUQVUTFFUBCMF
r SFDPOOFDUUIFDBCMF
r àUUIFNPEVMBUPSDPWFSBOETFBM
C3) Final checks
r BUUBDIUIFBEEJUJPOBMQMBUFTVQQMJFEXJUIUIFUSBOTGPSNFSTQFDJGZJOHUIFUZQFPGHBTBOEUIFDBMJCSBUJPOQFSGPSNFE
Carry out the following operations:
"SFQMBDFUIFNBJOCVSOFSOP[[MFT
B) change the modulator voltage
C) new max. and min. calibration of the pressure regulator.
A) Replace the burner injectors
r DBSFGVMMZQVMMUIFCVSOFSPGGJUTTFBU
r SFQMBDF UIFCVSOFSJOKFDUPST NBLJOH TVSFUP GVMMZ UJHIUFO
them to prevent gas leaks. Injector diameters are specied
in table
2.
Replacing the diaphragm nozzle
GPSNPEFMTJBOE'J
r SFNPWFUIFHBTJOMFUIPTFPG'JHVSFC
r SFQMBDFUIFEJBQISBHNOP[[MFNPVOUFEPOUIFHBTWBMWF

r QVUCBDLUIFHBTJOMFUIPTF
B) Change the modulator voltage
r set parameter F02 according to the gas used, as descri-
bed in section
20.
C) Calibrate the pressur
e regulator
r DPOOFDUUIFQPTJUJWFQSFTTVSFUFTUQPJOUPGBEJGGFSFOUJBM
pressure gauge (possibly water-operated) to the gas valve
pressure test point (Pb) (Figure 12a). For models 240 i/Fi
use the pressure tap (3) in the gas inlet hose (gure 12b).
Connect, for sealed chamber models only, the negative
pressure test point of the manometer to a “T” tting in
order to join the boiler adjusting outlet, the gas valve
adjusting outlet (Pc) and the manometer. (The same
measurement can be made by connecting the pressure
gauge to the pressure test point (Pb) after removing the
GSPOUQBOFMPGUIFTFBMFEDIBNCFS
Measuring burner pressure using methods other than
those described could lead to incorrect results as the low
pressure created by the fan in the sealed chamber would
not be taken into account.
C1) Adjustment to nominal heat output:
r PQFOUIFHBTDPDL
r QSFTTUIF CVUUPO
(and set the boiler in winter mode
Valve SIT
mod. SIGMA 845
Figure 12a
9912221500
Pc
Pb
Pa
0206_0501
Figure 12b (models 240 i - 240 Fi)

Baxi Nuvola 3 BS 280 Fi Specifications

General

Brand	Baxi
Model	Nuvola 3 BS 280 Fi
Category	Boiler
Language	English