Clean Burner Body, Nozzle And Burner; Cleaning The Heat Exchanger; Checking The Expansion Vessel; Setting The Heating System Operating Pressure - Bosch Gaz 6000 W Installation And Maintenance Instructions Manual

Inspection and maintenance

15.2.4 Clean burner body, nozzle and burner

▶ Loosen five screws and lift out the combustion chamber cover by
pulling it forwards.
1
2
Fig. 33 Opening the burner
[1] Screws
[2] Combustion chamber cover
▶ Remove the burner.
▶ Remove the nozzle holder.
▶ Clean the burner with a brush to ensure that the fins and nozzles are
clear. Do not clean the nozzles with metal pins.
▶ Check electrodes for contamination and clean or replace if required.
▶ Check gas setting ( page 30).
1
4
Fig. 34
[1] Nozzle holder
[2] Half burners
[3] Gas valve
[4] Nozzle
36
2
3
0 010 005 990-001

15.2.5 Cleaning the heat exchanger

1. Disconnect the cable.
2. Remove screw fittings.
3. Pull the heat exchanger out towards the front.
1.
2.
Fig. 35
▶ Clean the heat exchanger in water using a rinsing agent and reinstall
it.
▶ Find any bent fins on the heat exchanger and carefully bend them
straight.

15.2.6 Checking the expansion vessel

The expansion vessel must be checked every year.
▶ Depressurise the device.
▶ Adjust the pre-charge pressure of the expansion vessel to the static
head of the heating system, if necessary.

15.2.7 Setting the heating system operating pressure

Display on the pressure gauge
1 bar Minimum charge pressure (when system is cold)
1 - 2 bar Optimal charge pressure
3 bar Maximum charge pressure at maximum heating
water temperature must not be exceeded (pressure
relief valve will release).
Table 23
▶ If the indicator is below 1 bar (when the system is cold): top up the
water until the indicator is between 1 bar and 2 bar again.
▶ If pressure is not being maintained: check expansion vessel and
heating system for leaks.
3.
2.
Gaz 6000 W – 6720866247 (2019/07)