9. Take the burners out of the water heater.
Fig. Remove the burners
10. Clean the burners with a soft brush.
11. Clean the pilot burner or, when necessary,
replace the pilot burner.
10.3.2 Clean the combustion
chamber
Use a vacuum cleaner and a soft brush to clean
the combustion chamber (1) of the heat
exchanger.
10.3.3 Assemble the burners
Assemble the burners when the burners and the
combustion chamber both are cleaned:
1. Replace the burners in the water heater and
fasten the two bolts.
2. Connect the burner tube to the gas control
valve.
3. Use a wrench to tighten the burner tube.
4. Connect the thermocouple to the gas control
valve.
5. Use a wrench to tighten the thermocouple
(max. 1/4 turn clockwise, it only needs to
make contact).
6. Connect the pilot pipe to the gas control
valve.
7. Connect the two slide contacts of the T.R.S.
to the thermocouple.
8. Connect the ignition cable to the piezo igniter.
9. Open the main gas supply and/or the manual
gas valve, refer to Installation diagram (see
8.3).
10.3.4 Finalization
When all maintenance activities are finished,
place the outer door back on the water heater.
After that:
1. If necessary, fill the water heater (see 8.7.1).
2. Make sure the gas supply pressure is correct.
If the gas supply pressure is not correct,
contact your mains gas supply company. Do
not use the water heater.
3. Make sure that the burner pressure is
correct, refer to burner pressure (see 8.7.2).
4. Turn on the water heater (see 8.7.3).
11 Troubleshooting
11.1 General
When the water heater has an error, do the
following tests:
•
Test the safety thermostat
•
•
Condensation of flue gases
Contact you maintenance and service engineer if
the error persists.
11.1.1 Safety thermostat
ll water heaters are equipped with a safety
thermostat. When the water temperature is too
high (>90°C), the gas supply is shut off. The
safety thermostat stays switched on until the
water temperature is below 45°C.
When the water temperature is below 45°C:
1. Turn on the water heater (see 8.7.3),
because the main burner and the pilot burner
are OFF.
2. Turn the temperature control knob to a lower
position (see 4.1.1) and test if the pilot flame
remains on.
Note
Repeated extinguishing of the pilot flame at
higher temperatures, shows that the safety
thermostat is switched on.
11.1.2 T.R.S. (Thermal Reflux
Safeguard)
All water heaters are equipped with a Thermal
Reflux Safeguard (T.R.S.). When the T.R.S.
detects a temperature that is too high (>90°C),
the gas supply is shut off. The T.R.S. stays
switched on until the thermostat is reset.
1. Check the flue discharge for blockage. If
necessary, remove the blockage.
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Installation, Maintenance and Service part
