Thermal Cut-outs | Ariston Unvented Hot Water Storage Cylinders

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4) Expansion relief valve - check manually by turning the test knob (ensure valve closes after testing);

5) Discharge pipes (D1) - from both temperature & pressure relief and expansion relief valve for obstructions;

6) Tundish & discharge pipe (D2) - open either valve gradually to produce a full bore discharge into tundish and D2 without any back pressure;

7) Pressure reducing valve - check that the correct outlet pressure is being maintained by recording the pressure at an in-line terminal fitting i.e. tap.

4.5THERMOSTATS

4.6MAINTENANCE

Ensure that all thermostats adjusted for the correct temperature setting, this should be between 60 and 65°C.

To ensure efficient safe operation, it is recommended that the appliance is serviced annually by a competent person.

After servicing, preliminary electrical system checks must be carried out to ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and short circuit).

To drain the cylinder it is necessary to proceed as follows:

1)Close the mains supply service valve;

2)Open hot water taps;

3)Attach a hose and open the drain cock and allow the cylinder to empty.

Magneisum Anodes (Classico model only)

No longer than every 12 months, the installer should check the magnesium anti-corrosion anodes (consult the label on the face of the unit for the correct location). Assessment of the condition of the bottom anode (where fitted) can be made by judging the condition of the top anode.

Removal of anodes;

1)Close the mains supply service valve;

2)Open hot water taps;

3)Attach a hose and open the drain cock and allow the cylinder to empty;

4)The anodes are removed by unscrewing;

EXAMINE THE ANODES AND REPLACE IF THE DIAMETER IS LESS THAN 10mm.

The use of an approved P.T.F.E. sealing tape is recommended to ensure watertight connection for anodes.

Thermal Cut-out(s)

If the thermal cut-out has operated the cause must be found before resetting.

Immersion Heater(s)

Should the immersion heater be scaled, we would recommend it be replaced.