Buderus Hydronic Systems Boiler User Manual

8

Environmental Protection / Disposal

8 Environmental Protection / Disposal

Environmental protection is one of the fundamental company policies of
the Bosch Group.
Quality of products, efficiency and environmental protection are equally
important objectives for us. Environmental protection laws and
regulations are strictly observed.
To protect the environment, we use the best possible technology and
materials, taking into account economic points of view.

Packaging method

For the packaging, we participate in the country-specific recycling
systems, which guarantees optimal recycling.
All packaging materials used are environmentally-friendly and
recyclable.

Old appliances

Old appliances contain materials that should be recycled.
The relevant assemblies are easy to separate, and all plastics are
identified. This allows the various components to be sorted for
appropriate recycling or disposal.

9 Boiler inspection and maintenance

Note the following when performing preventive maintenance:

DANGER: Danger to life from electric shock!

▶ When performing maintenance, label all connection

cables before disconnecting them.

▶ If cables are connected incorrectly, the system may

not operate correctly, with possibly dangerous
consequences.

▶ Always check that the heating system is working properly after

carrying out any maintenance work.

9.1 Why is regular maintenance important?

Heating systems must be serviced annually for the following
reasons:

• To maintain high efficiency Economical operation (low fuel
consumption)

• To achieve a high level of operational safety

• To maintain the cleanest combustion

• To ensure reliable operation and a

• Long service life

Maintenance work must be carried out only by a trained and certified
installer or service company. When replacing components, only Bosch
approved Buderus components may be used. The system should be
serviced annually. The results of the inspection must be recorded in the
maintenance log ( Chapter 9.8, page 35).

Spare parts can be ordered from Bosch with the aid of
the parts list.

9.2 Checking the flue gas system, combustion air supply,

air inlet and ventilation openings

▶ Check the flue gas system, including the combustion air supply.
▶ Check air inlet and ventilation openings.
▶ Remedy any defects immediately.
▶ Make sure that the combustion air supply and the ventilation

openings are not blocked at any point.

9.3 Inspection of the boiler and burner

▶ Perform a visual inspection of the boiler and burner for external dirt

accumulation.

▶ If dirt is found, clean boiler and burner.

Logano G334X – 6 720 811 237 (2017/02)28

9.4 Preparing the boiler for cleaning

DANGER: Risk of fatal injury from electric current when

appliance is opened up!
▶ Before opening the boiler:

Disconnect heating system from the power supply
via the ON/OFF switch or the appropriate building
fuse.

▶ Take measures to ensure that the heating system

cannot be accidentally reactivated.

WARNING: Risk of fire from foreign objects!
Foreign objects between the main orifice and burner rod

inlet opening can cause a fire.
▶ Ensure that there are no objects at this location.

▶ When working on an open boiler: Secure appliance

components and cables to prevent them from getting
between the openings during operation.

▶ Shut down the heating system ( Chapter 7.1, page 27).
Removing the front wall of the boiler ( Fig. 38):

▶ Unscrew the locking screws [2] at the bottom of the front wall of the

boiler.

▶ Tilt the front wall of the boiler [1] forward and lift it out.

1

Boiler inspection and maintenance

9

1

7 747 014 639-30.2T

Fig. 39 Gas valve in OFF position

[1] ON/OFF knob (OFF position)

9.5 Cleaning the boiler

The boiler can be cleaned with brushes and/or by wet cleaning. Cleaning
tools are available as accessories.

9.5.1 Cleaning the boiler with brushes (mechanical cleaning)

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.

2

Fig. 38 Removing the front wall of the boiler

[1] Front wall of boiler
[2] Locking screws

DANGER: Risk of fatal injury from explosion of
flammable gases!

▶ Operations on the gas lines may be carried out only

by properly licensed gas contractors.

▶ Wait five (5) minutes until all gas has dissipated.

Check whether there is any smell of gas, including at
floor level. If you smell gas: STOP!
Check that the gas shutoff valve is closed. Repeat the
odor test. If you do not smell gas, proceed to the next
step.

▶ Turn the gas valve ON/OFF knob [1] clockwise to the OFF position.

Do not use excessive force.

6 720 810 547-35.1T

DANGER: Risk of fatal injury from electric current when
appliance is opened up!

▶ Before opening the boiler:

Disconnect the heating system from the electrical
power supply by means of the emergency shutoff

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.
▶ Tie gas line [2] with wire or cord (secure).
▶ Loosen the retaining screw [1] on the gas feed line.
▶ Check the gasket for damage. Replace damaged gasket. Keep the

gasket in a safe place.

▶ Label wires of flame roll-out safety shutoff switch [4] and disconnect

them from the switch [5].

Logano G334X – 6 720 811 237 (2017/02) 29

9

Boiler inspection and maintenance

▶ Disconnect connection lines to the gas valve [7].

1

2

6

7

5

4

3

2

1

6 720 810 547-16.1T

Fig. 40 Removing the burner

[1] High-tension ignition lead
[2] Flame roll-out safety shutoff switch
[3] Connection cable to gas valve
[4] Gas valve
[5] Connection cable to flame roll-out safety shutoff switch
[6] Gas supply line
[7] Union on gas supply line

▶ Loosen retaining nuts [1] on the burner shield. Pull the burner out

straight.

▶ Make sure that the spacers [2] remain on the studs.

4

5
3

2

1

6 720 810 547-36.1T

Fig. 42 Cleaning the hot gas flues

[1] Cleaning Brush
[2] Thermal insulation

2

1

1

6 720 810 547-17.1T

Fig. 41 Removing the burner

[1] Retaining nuts
[2] Studs with spacers

Cleaning the boiler:

▶ Remove the boiler casing and thermal insulation; check for damage.
▶ Unscrew cleaning cover from the draft diverter.
▶ Use cleaning brushes to brush out hot gas flues.

To prevent entry of metal dust into the control unit:
▶ Cover controller with foil.

▶ Clean combustion chamber and bottom panel.
▶ Screw cleaning cover into place and replace thermal insulation.
▶ Install boiler casing.

2

1

1

Logano G334X – 6 720 811 237 (2017/02)30