Bedienungsanleitung Bosch Uni 3000 F (Seite 7 von 12) (Englisch)

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Correcting burner faults | 7

6 720 812 901 (2014/10)Uni 3000 F

6 Correcting burner faults

The display shows heating system faults. Further information on the

fault displays can be found in the operating instructions of the relevant

control unit. In addition, burner faults are signalled by an indicator on the

burner.

▶ Press burner reset button (see burner operating instructions).

If the burner still fails to start after three attempts, contact a suitably

qualified contractor.

7 Inspection and maintenance

7.1 What makes regular maintenance important?

Have your heating system regularly serviced:

• to maintain a high level of efficiency and to operate the system

economically (low fuel consumption),

• to achieve a high level of operational reliability,

• to maintain the cleanest possible combustion.

7.2 When do you need to check the water pressure in your

heating system?

Recently added fill or top-up water loses much of its volume in the first

few days because it naturally releases gases. With new systems you

should therefore initially check the heating water pressure on a daily

basis, and then at gradually longer intervals.

• Once the heating system is hardly losing any volume, check the

heating water pressure monthly.

A distinction is generally made between open vented and sealed

unvented systems. In practice, open vented systems are rarely installed

nowadays. We will therefore be using a sealed unvented heating system

to demonstrate how you can check the water pressure. All settings will

have already been made by the installation engineer when the system

was first commissioned.

NOTICE: Risk of system damage through frost.

When there is a frost, your heating system can freeze up

if it is shut down, e.g. through a fault shutdown.

▶ If your heating system has been shut down for several

days due to a fault shutdown and there is a risk of

frost, drain the heating water at the drain & fill valve.

Also leave the air vent valve at the highest point in the

system open.

NOTICE: System damage due to the reset button being

pressed too frequently.

This can damage the burner ignition transformer.

▶ Press the reset button no more than three times in a

row.

NOTICE: System damage through absence of or faulty

cleaning and maintenance.

▶ Have the heating system inspected and cleaned by a

contractor annually. Check that the complete heating

system operates correctly.

▶ Immediately correct all faults to prevent system

damage.

▶ We recommend you enter a contract covering an

annual inspection and service subject to demand.

Annual inspection and service are part of the warranty

terms and conditions.

Use only genuine spare parts from the manufacturer.

Spare parts can be ordered via spare parts merchants.

A spare parts list is available online (see last page for

details).

The fill and top-up water quality must comply with the

specifications in the operator's log supplied.

Air pockets may form in the heating system through the

fill or top-up water releasing gases.

▶ Vent the heating system (e.g. bleeding the radiators).

▶ If required, top up with water.

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