Cleaning The Boiler; Remove Burner; Cleaning The Boiler With Brushes (Mechanical Cleaning) - Buderus Logano G234X-64 Installation And Service Instructions Manual

9
Boiler inspection and maintenance
9.5

Cleaning the boiler

The boiler can be cleaned with brushes and/or by wet cleaning. Cleaning
equipment is available as an accessory by special order.
9.5.1

Remove burner:

DANGER: Danger to life from electric shock!
If cables are connected incorrectly, the system may not
operate correctly, with possibly dangerous consequences.
▶ When performing maintenance, label all connection
cables before disconnecting them.
▶ Always check that the heating system is working
properly after carrying out any maintenance work.
DANGER: Risk of fatal injury from electric current when
appliance is opened up!
▶ Before opening the appliance:
Disconnect the heating system from the power
supply completely via the ON/OFF switch or the
appropriate building fuse.
▶ It is not sufficient just to switch off the controller.
▶ Take measures to ensure that the heating system
cannot be accidentally reactivated.
▶ Disconnect the heating system from the power supply.
▶ Close the gas main shutoff valve.
▶ Disconnect pilot gas line [6] from the gas valve [8].
▶ Disconnect high-tension ignition lead [3] from the burner controller.
▶ Secure gas line [2] with wire or cord.
▶ Loosen the union [1] on the gas supply line.
▶ Check the gasket for damage. Replace damaged gasket. Keep the
gasket in a safe place.
▶ Identify the connection cable for the flame roll-out safety shutoff
switch [4] and then disconnect it from the flame roll-out safety
shutoff switch [5].
▶ Disconnect connection lines to the gas valve [8].
8
7
6
Fig. 31 Removing the burner
[1] Union on gas supply line
[2] Gas line
[3] High-tension ignition lead
[4] Flame roll-out switch connection cable
[5] Flame roll-out safety shutoff switch
[6] Pilot gas line
[7] Connection cable to the gas valve
[8] Gas valve
26
▶ Loosen retaining nuts ( Fig. 32 [1]) on the burner shield.
▶ Pull the burner out straight.
▶ Make sure that the spacers [2] remain on the studs.
1
Fig. 32 Removing the burner
[1] Retaining nuts
[2] Studs with spacers
9.5.2

Cleaning the boiler with brushes (mechanical cleaning)

▶ Remove the boiler casing and thermal insulation; check for damage.
▶ Unscrew cleaning cover from the draft diverter.
▶ Cover control unit with foil to prevent entry of metal dust into the
control unit.
▶ Use cleaning brushes [1] to brush out hot gas flues.
▶ Clean combustion chamber and bottom panel.
▶ Screw cleaning cover into place and replace insulation.
▶ Install boiler cover.
1
2
3
4
5
6 720 806 028-12.1T
Fig. 33 Cleaning the hot gas flues
[1] Cleaning brush
[2] Thermal insulation
1
2
Logano G234X – 6 720 811 233 (2017/02)
2
6 720 806 028-13.1T
6 720 806 028-21.1T