47
11 - MAINTENANCE
11.9 EXPANSION TANK
Check the expansion vessel charge (at least once a year).
First check that the expansion vessel is totally drained of
water.
If you necessary load with nitrogen, take care that the
pressure does not exceed the value indicated on the label.
11.10 ANODE ROD REPLANCE
The magnesium sacrificial anodes assure the storage tank
anti-corrosive protection.
The magnesium anode is replaced when its diameter is
of a
third of the original anode.
x
Remove power supply
x
Turn off the water inlet valve (A)
x
Open hot water tap for decrease the pressure of the
storage tank.
x
Open tap (B)
x
Empty the storage up to point (C)
x
Unscrew the screws and remove the cover cap.
x
Get off the anode rod.
x
Replace with a new one, and make sure effective sealed.
x
Control that there are no water losses from the fitting.
x
Put the cover cap and fix
x
Open the water inlet tap (A) untill water flows out from
outlet tap, then turn of water outlet tap.
x
Power on then restart the unit.
The anode must be:
x
Checked all 6 – 12 months
x
Replaced all 2-3 years
Anode
A
B
C
Summary of Contents for SWH-190-300IRE
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