Conversion To A Different Gas Type - Buderus Logano GE434 Maintenance Instructions Manual

Converting the boiler to a different gas type
9.2

Conversion to a different gas type

Only boilers with digital burner control unit can be
converted to LPG. Take the following steps:
! Isolate the heating system from the mains electrical
supply; to do that, set the ON/OFF switch to "0"
(OFF).
! Close the gas shut-off valve.
! Remove the boiler side panels.
! Replace the main gas nozzle for those used with the
new gas type, and use new gaskets.
! Check the main gas nozzles by means of their
designation Table 17 and Fig. 25, page 48.
! Release the pilot gas pipe from the pilot burner and
replace with the pilot burner nozzle for the new gas
type. pilot burner nozzle designation (Table 18).
PLEASE NOTE
To convert the boiler to a different gas
type, proceed strictly in the following
order:
Conversion from natural gas to LPG:
First carry out procedure A, then
procedure B (see the following pages).
Conversion from LPG to natural gas:
First carry out procedure B, then
procedure A (see the following pages).
! Reinstall the pilot gas pipe.
We reserve the right to make any changes due to technical modifications.
Commissioning and maintenance instructions Logano GE434 Gas-fired special boiler • Issue 02/2003
Gas type
Natural gas H (G20), GZ50:
Natural gas L (G25), S (G25.1):
LPG P propane (G31):
LPG B/P butane/propane (G30):
Tab. 18 Pilot gas nozzle designation
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
9
Pilot gas nozzle
designation
5
5
3
3
49