Technical data
26 | Inspection/Maintenance
Gaz 6000 W8 716 473 216 (2014/09)
13.1.3 Cleaning the burner pan, nozzles and burner
▶ Loosen five screws and lift out the combustion chamber cover by
pulling it forwards.
Fig. 31 Opening the burner
[1] Screws
[2] Combustion chamber cover
▶ Remove burner.
▶ Remove the nozzle holder.
▶ Clean burner using a brush. Ensure that the blades and nozzles are
clear. Do not use a metal brush to clean the nozzles.
▶ Check electrodes for contamination and clean or replace if required.
▶ Check the gas setting ( page 22).
Fig. 32
[1] Blast tube connection
[2] Burner half
[3] Gas train
[4] Nozzle
13.1.4 Cleaning the heat exchanger
1. Disconnect the cable.
2. Remove screw fittings.
3. Pull the heat exchanger out towards the front.
Fig. 33
▶ Clean the heat exchanger in water using a rinsing agent and reinstall it.
▶ Carefully straighten any distorted fins on the heat exchanger.
13.1.5 Checking the expansion vessel (also see page 10)
According to DIN 4807, Part 2, Section 3.5, the expansion vessel must
be checked annually.
▶ Depressurise the appliance.
▶ Adjust the pre-charge pressure of the expansion vessel to the static
head of the heating system, if necessary.
13.1.6 Setting the heating system pressure
▶ If the pointer is below 1 bar (when the system is cold), top up with
water to the system until the pointer is between 1 bar and 2 bar again.
▶ If there is a pressure drop: check the expansion vessel and heating
system for leaks.
13.1.7 Checking electrical wiring
▶ Check wiring for mechanical damage and replace faulty cables/leads.
6 720 806 640-11.2O
1
2
3
12
4
6 720 806 640-10.3O
NOTICE: Damage to appliance due to cold water!
Stress cracks can occur on the hot heat exchanger when
the heating water is topped up.
▶ Only top up the heating water when the appliance is
cold.
Pressure gauge reading
1 bar Minimum system pressure (when cold)
1 - 2 bar Optimum system pressure
3 bar Maximum system pressure at highest heating water
temperature::
must not be exceeded (safety valve opens).
Table 16
3.
2. 2.
6 720 806 640-15.2O
1.