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5 MAINTENANCE
Isolate all electrical supplies before removing any components or before draining the cylinder or heat source circuits.
5.1 Inspection Access
Where necessary, the internal components of the cylinder can be inspected by means of the immersion heater boss (1¾”) using an
appropriate inspection tool e.g. boroscope.
5.2 Replacement Parts
Part description
Code
Cylinder thermostat
WDS6
Immersion heater c/w stat (1¾”)
3602
This stainless steel cylinder requires no corrosion protection device e.g. anode.
5.3 Fault Finding
Symptom
Possible cause
Possible remedy
Little / no hot water flow
Mains water supply isolated
Open stopcock.
Cistern ball cock failure
Check ball cock in cistern tank.
Water from hot taps is cold
Boiler programmer or immersion timer not
calling for hot water
Set programmer / timer to call.
Cylinder thermostat high limit tripped or
immersion thermostat high limit tripped
Check and reset (refer to Section 1).
Heat source malfunction
(e.g. boiler / immersion heater / etc)
Check heat source – if faulty, refer to heat source manufacturer’s
instructions.
Motorised valve malfunction
(where fitted, not supplied as standard)
Manually activate motorised valve.
If cylinder begins to heat, replace valve.
Circulating pump malfunction
Check wiring and/or plumbing connections to pump.
