Hermostats; Maintenance; Thermal Cut-Out(); Immersion Heater() - Ariston Unvented Hot Water Storage Cylinders Instructions For Installation And Use Manual

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4.5 T

HERMOSTATS

4.6 M
AINTENANCE
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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.
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.
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