Buderus Logano GE434 Maintenance Instructions Manual page 50

9 Converting the boiler to a different gas type
Procedure A
Setting the gas burner output in accordance with the
nozzle pressure method
! Release the plug of the test port on the burner
manifold (Fig. 26, Item 1) by two full turns, and push
on the test hose of the U-tube pressure gauge.
! Switch the ON/OFF switch to "I" (ON).
! Read off the nozzle pressure at the U-tube pressure
gauge with the burner operating, and compare the
actual value with the following values.
Boiler size
150 - 375
Tab. 19 Rated gas nozzle pressure
Boiler
size
58 - 37 36
kW mbar mbar
150 - 375 35 34
Tab. 20 Nozzle pressure for LPG P subject to the supply pressure
Boiler
size
58 - 37 36
kW mbar mbar
150- 375 31.5 31.5
Tab. 21 Nozzle pressure for LPG B/P subject to the supply pressure
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
50
Rated gas nozzle pressure
Natural gas
H (G 20)
L (G 25)
S (G 25.1)
GZ50
mbar
14
35 34
mbar mbar mbar
33 32
Butane/propane mixtures
35 34
mbar mbar mbar
31.5 31.5
1
Fig. 26 Checking the nozzle pressure
Item 1: Test port on the burner manifold
Nozzle pressure
LPG
Propane
P (G 31)
Supply pressure
(Flow pressure)
33 32 31
mbar mbar
31 30 29
Nozzle pressure
LPG
B/P (G 30)
Supply pressure
(Flow pressure)
33 32 31
mbar mbar
31 30 29
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
30 29 28
mbar mbar mbar
28 27 26
30 29 28
mbar mbar mbar
28 27 26
27
mbar
25
27
mbar
25