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19
FITTING THE BURNER TO THE BOILER AND CONNECTING THE GAS PIPES
The burner is fitted with a sliding attachment flange on
the burner head. When fitting the burner to the boiler,
this flange must be correctly positioned so that the
burner head penetrates the boiler by the amount speci-
fied by the manufacturers of the boiler.
When the burner is fitted correctly to the boiler, pro-
ceed with the connection of the gas feed pipe (see BT
8871 and BT 1387).
The size of the gas feed pipe must be proportional to its
length and to the gas delivery rate in accordance with
the UNI standard (see diagram), and it must be per-
fectly airtight and properly tested before running the
initial tests on the burner. It is essential to fit a con-
nector to this pipe, near to the burner, for the easy dis-
mounting of the burner and/or the opening of the boiler
door.
The DUNGS mod. MB... valve has a filter and gas pres-
sure stabilizer, which means that only the cut-off cock
and the vibration damper joint should be fitted to the
gas feed pipe.
A pressure reduction unit should be installed outside
the heating system only in cases where the gas pres-
sure exceeds the level permitted by the standard (4oo
mm.W.C.).
It is recommended to put a bend directly on the burner
gas train before fitting the detachable connector.
This is to allow the opening of the boiler door, when the
connector itself has been opened.
These details are clearly illustrated in the following dia-
gram (BT 8871).
ENGLISH
8871.tif
LUNGHEZZA VIRTUALE TRA
T
T
A in m / VIRTUAL LENGHT DEAL
T WITH IN METRES
LONGUER VIRTUELLE en m / VIRTUELLE L
Ä
NGE in m / LONGITUD VIRTUAL en m.
PORTATA / FLOW / DEBIT / DURCHSATZ / CAUDAL m
3
/h
BT 1387
Содержание COMIST 18
Страница 8: ...8 Metano Natural gas Gasolio Light oil CAMPO DI LAVORO WORKING FIELD N 0002920161 G P L L P G ...
Страница 25: ...25 GAS BURNERS CONTROLS LGB for small to medium capacity burners with or without a fan intermittent operation ...
Страница 26: ...26 GAS BURNERS CONTROLS LGB for small to medium capacity burners with or without a fan intermittent operation ...
Страница 28: ...28 GENERAL DIAGRAM FOR TWO STAGE L P G PRESSURE REDUCTION FOR BURNER OR BOILER N BT 8721 2GB Rev 21 03 90 ...
Страница 29: ...29 SCHEMA DISPOSIZIONE DISCO ELETTRODI DISK ELECTRODES RELATIVE POSITION DIAGRAM COMIST 18 N BT 9260 ...
Страница 34: ......