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15
Boiler inspection and maintenance
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).
5
4
3
Fig. 34 Front view GC 144 II
[1]
Flame roll-out switch
[2]
Flame roll-out switch cable
[3]
Gas valve
[4]
Gas supply pipe
[5]
Boiler temperature controller
[6]
Ignition module
[7]
Igniter cable
[8]
Gas valve cable connector
[9]
Pilot line
[10] Igniter cable
22
6
7
8
9
10
1
2
6 720 804 440-45.1T
1
Fig. 35 Removing burner
[1]
Screw nuts (two)
[2]
Screws on gas manifold on top of gas valve (four)
▶ Remove four (4) screws from gas manifold on top of gas valve.
▶ Remove two (2) screw nuts on burner tray and take out the tray.
Fig. 36 Remove top cover
▶ Remove 4 screws on sides of the top cover and lift off.
▶ Remove top boiler insulation.
▶ Unscrew cleaning cover from the venting manifold.
▶ Cover control with foil to prevent entry of metal dust into the control.
▶ Use boiler brush to clean out flue gas passages.
▶ Clean combustion chamber and bottom insulation.
▶ Replace cleaning cover, install screws, and replace insulation.
Logano GC 144 II – 6 720 808 893 (2017/02)
2
6 720 804 440-46.1T
6 720 804 440-47.2T
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