Buderus Logano GC 124 II User Manual page 4

3
Conversion to propane
WARNING: Risk to life through the explosion of volatile
gases.
B Wait five (5) minutes until all gas residues have
dissipated. Check whether there is any smell of gas,
including at floor level. If you can smell gas, close the
gas shut-off and disconnect the heating system from
the power supply and contact the customer service
technician or the gas company.
B If there is no sign of a gas odor, continue with the next step.
Removing burner
B Secure gas manifold with wire or cord.
B Remove igniter cable from ignition module (
B Disconnect cable connector from bottom of gas valve
( figure 3, [3]).
B Label cables to the flame roll-out switch, then remove cable
( figure 3, [2]).
5
4
3
Fig. 3 Front view
[1] Flame roll-out switch
[2] Flame roll-out switch cable
[3] Gas valve
[4] Gas supply pipe
[5] Aquastat
[6] Ignition module
[7] Igniter cable
[8] Gas valve cable connector
[9] Pilot line
[10] Igniter cable
4
figure 3, [6]).
6
7
8
9
10
1
2
6 720 804 435-03.1T
1
Fig. 4 Removing burner
[1] Screw nuts (two)
[2] Screws on gas manifold on top of gas valve (four)
B Remove four (4) screws from gas manifold on top of gas valve.
B Remove two (2) screw nuts on burner tray and take out the tray.
Replacing main gas orifices
B Install the new main gas orifices and copper gasket. Check with
table 3 that the correct orifices for operation of the boiler are
installed.
These orifice sizes are exclusively for installations 0-
8500 feet above sea level.
Orifice sizes for propane
Model GC124-18
Orifice size 180
Qty 2
Table 3 Orifice sizes for propane
These values are applicable for the U.S.A. only.
for altitudes of 0 - 8500 ft.
Logano GC 124 II – 6 720 804 435 (2012/09)
2
6 720 804 435-04.1T
GC124-25 GC124-32
175 170
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