Expansion vessel maintenance
The expansion vessel is supplied with a pre-charge of 3 bar, this pressure may be lost
over time and should be checked periodically to keep the vessel functioning well and
help prolong the lifespan of the tank.
To check the pressure of the vessel, a reading should be taken while the unit is switched
off and the content of the tank has been cooled. Turn off the power to the unit and run
water off from the outlet until it is at ambient temperature, check the pressure reading
and increase/decrease as required (a standard pump with built in pressure gauge is
required).
Legionella risk advice
In order that Legionella risk is kept to a minimum the following advice is given:
•
The heater should be run at its maximum temperature setting (70
0
C) and flushed
through at regular planned intervals, particularly important where lower storage
temperatures (< 50
0
C) or eco settings are used.
•
The whole system should be drained if long periods of non-use are expected.
•
The expansion vessel should be drained occasionally to ensure the water in it is
recycled.
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