IS339 ECN3539
10
10 Remove the outer and tank lids again and inspect the tank and level
sensor housings for scale deposits. If necessary repeat the descaling
process
11 Drain and flush all descaling agent from the tank completely as follows
i Remove the two screws behind the drip tray that secure the lower
front panel
ii Connect a hose from the overflow pipe to a bucket and turn the
service valve to drain the remainder of the water from the tank
iii Flush out the tank with clean water
iv When empty shut the valve and replace the cover
12 Replace the tank lid, ensuring that the gasket is sealing the top of the
tank correctly
13 Fit the outer lid and turn on the boiler.
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