Bedienungsanleitung Bulex FES 400 (Seite 8 von 112) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Portugiesisch, Spanisch, Polnisch)

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Appendix

6 Installation instructions 0020246836_02

Appendix

A Detecting and eliminating faults

Fault Possible cause Remedy

No flow rate at the water

tap

1. The cold-water isolation valve is closed.

2. The main filter is blocked.

3. The pressure reducer is not installed correctly.

1. Check and open the cold-water isolation valve.

2. Close the cold-water isolation valve, and clean

the filter and the pressure reducer.

3. Check whether the pressure reducer has been

installed correctly.

Low flow rate and pres-

sure at a water tap

1. The filter in the cold water pipe is clogged. 1. Close the cold-water isolation valve, and clean

the pressure reducer filter.

Water from the water tap

is cold

1. The cylinder was not started up.

2. The cold-water isolation valve is not fully open.

3. The heat generator is not operating.

4. The thermal cut-out for a system component

has been triggered.

5. The 2-port motorised valve is defective.

6. The immersion heater is defective.

1. Open all of the relevant valves.

2. Check the thermostat or the room thermostat

and, if required, set this.

3. Check the heat generator to see if a fault code

is present.

4. Check and initialise the cylinder.

5. Check the connections for the 2-port motorised

valve.

Domestic hot water

temperature at the water

tap too high

1. The thermostat is set too high.

2. The thermostatic valve is not present or is

defective.

1. Check the target temperature. It must be

between 60 and 65 °C.

2. Install a mixer tap.

3. Check the cabling. Repair the cable.

4. Reduce the temperature of the thermostat to

60 °C.

5. Replace the thermostatic valve.

Irregular domestic hot

water output at the water

tap

1. The expansion vessel is defective.

2. The thermal cut-out for a system component

has been triggered (thermal control).

1. Compare the temperature between the con-

trols. The maximum temperature has priority.

2. If required, adjust the pre-charge pressure.

3. Interrupt the power supply to the product and

the heat generator. Check the thermal cut-outs

for the system components and replace these

in the event of a defect.

B Inspection and maintenance work – Overview

The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na-

tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of

the intervals listed.

# Maintenance work Interval

1 Check the connections for tightness (visual inspection). Annually

2 Check the temperature and pressure relief valve (by actuating it) Annually

3 Check the pressure in the expansion vessel (annual manometer). Annually

4 Check the tightness of the flange in the cleaning eye (visual inspection) Annually

5 Check the state of wear of the magnesium protection anode Annually

6 Clean the cylinder Annually

7 Check the contacts of the external current anode for corrosion Annually

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