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15.5 Cleaning the boiler
The boiler can be cleaned with brushes and/or by wet cleaning. Cleaning
tools are available as accessories.
Inspecting the ignition burner
▶ Observe the ignition burner through the sight glas window
( figure 31).
Fig. 31 GC124 II
[1]
Sight glass
▶ The flame must rise over the sensor by ½" to 1-½".
▶ The pilot ignition gas pressure must be adjusted if the flame is too
small or too large.
The adjustment screw is located behind a safety screw
on the gas valve ( figure 33).
1
Fig. 32 Correct ignition flame setting
[1]
Flame rises ½" to 1-½" above sensor
[2]
Ignition flame
▶ Remove the safety screw on the adjustment screw for the igniter
( figure 24, page 17).Turn the inner adjustment screw clockwise to
reduce the size of the ignition flame, and counterclockwise to
increase it.
▶ After completed adjustment replace the safety screw
( figure 24, page 17).
Logano GC 124 II – 6 720 804 440 (2012/11)
1
6 720 804 440-39.1T
2
6 720 804 440-40.1T
Boiler inspection and maintenance
▶ If the flame is too small, the pilot orifice needs cleaning
( figure 39, page 23). If the igniter flame is acceptable, start
cleaning.
Be careful not to damage the pilot orifice during
installation and cleaning.
1
Fig. 33 Gas valve
[1]
Safety screw on igniter adjustment screw
15.5.1 Cleaning the boiler with brushes
Burner removal
WARNING: Risk to life from electric shock.
▶ Before opening a unit: disconnect electrical power
and lock to prevent accidental reactivation.
▶ If cables are connected incorrectly the system may
not operate correctly with possibly dangerous
consequences.
▶ After maintenance test the heating system for proper
function.
▶ Before opening a unit: disconnect electrical power and lock to prevent
accidental reactivation.
▶ Close main gas shut-off.
▶ Secure gas manifold with wire or cord.
▶ Remove igniter cable from ignition module ( figure 34, page 22).
▶ Disconnect cable connector from bottom of gas valve ( figure 34,
page 22).
▶ Label cables to the flame roll-out switch, then remove cable
( figure 34, page 22).
15
6 720 804 440-41.1T
21
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