Domestic Maintenance - Atlantic VERTIGO 50 Documentation For Installation And Use

Flushing of sediment and draining
To flush or to drain the water heater, power must be turned off and then
turn off the cold water supply to the water heater. The lever on the
pressure and temperature relief valve should be opened but care should
be taken so the lever does not snap back as it could damage the valve
seat. The pressure in the water heater will be released when the lever is
opened. The union at the cold water inlet to the water heater should be
undone and a hose should be attached to the water heater side of the
union. The other end of the hose should go to a drain.
Opening the pressure and temperature relief valve allows air into the
water heater and for the water to drain. Following complete draining of
the water heater, the closest hot water taps may be opened fully and
the pressure and temperature relief valve closed with care. Following
reconnection at the cold water inlet, the cold water stop valve is now
opened fully and the water heater may be filled with cold water and
flushed through to ensure the cylinder contains no sediment and is clean.
Finally the closest hot taps are closed and power may be turned on again
to the completely filled water heater.
In the event of an anomaly - the heater does not heat or steam is released
from the Pressure Temperature Relief valve - switch off the electric power
supply and contact your reseller.

Domestic maintenance

Water heaters do not require much domestic maintenance by the user.
Operate the Pressure Temperature Relief valve once a month to eliminate
any residue of scaling and check that it is not blocked. Open and close the
PTR valve slowly to avoid damage to the seal.
DANGER: Failure to operate the Pressure Temperature Relief valve at least
once every six months may mask a problem with the water heater.
Continuous leakage of water from the Pressure Temperature Relief valve
may indicate a problem with the water heater.
It is not unusual for the Pressure Temperature Relief valve to allow a small
quantity of water to escape during the heating cycle and this must be left
open to the atmosphere.
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