Buderus Condensing gas boiler Instructions Manual page 6

3
Liquid Propane conversion
B Loosen both retaining clips on the burner cover
(Æ fig. 6).
Fig. 6 Opening the retaining clips
B Remove the burner cover together with the fan unit and
the gas valve (Æ fig. 7).
Fig. 7 Removing the burner cover with the gas/air unit
B Undo the 3 screws (Æ fig. 8, [1]) and remove the gas
valve with the venturi from the fan unit (Æ fig. 8, [2]).
1
Fig. 8 Removing the screws and gas valve with venturi
6 Logamax plus GB162-80 kW/100 kW - We reserve the right to make any changes due to technical modifications!
B Take the gas valve and venturi from the conversion kit
# 7746900499.
B If the boiler is installed above 8,000 ft (2,440 m).
altitude, the orifice needs to be changed. Follow the
instructions below. Otherwise, go to the next step
– Undo the 4 screws (Æ fig. 9, [1]) and remove the
gas valve from the venturi (Æfig. 9, [2]).
6720615033-007.1TD
2
Fig. 9 Removing the gas valve
– Change the 4.70 (0.185") orifice for the 5.00
(0.197"), (Æ table 2), (Æ fig. 10).
Thermal
power
gas
boiler
6720615033-008.1TD
GB162-
80 kW/
100 kW
2
Tab. 2 Gas orifice diameter
6720615033-009.1TD
Fig. 10 Changing the orifice
Type of Gas orifice
gas Altitude diameter
supply ft. (m) inch (mm)
Natural 0-4,000
8.40(0.331)
gas (0-10,200)
0-8,000
LPG P 4.70(0.193) 7746900499
(0-2,440)
8,000-10,200
LPG P 5.00(1,97) 871860872A
(2,440-10,200)
1
6720615033-010.1TD
Venturi
article
number
73983
6720615033-011.1TD