2.7
Pressure switch
The pressure switch (P/N UGKPRES180, not supplied) is used to verify that there is no return of flue gases
in the event of installation with a common flue/chimney.
2.8
Checks
Verity that the water connections are correct, as follows:
l the feedwater supply line can be closed using a shut-off valve;
l a mechanical filter is installed on the feedwater line;
l water temperature and pressure are within the permitted values;
l the drain pipe is resistant to operating temperatures of 100°C (212°F);
l minimum inside diameter of the drain pipe is 40 mm (1”1/2);
l minimum slope of the drain pipe is greater than or equal to 5°;
l an inspection section is fitted with connection to a condensate drain.
Important: when installation is completed, flush the feedwater line for around 30 minutes by piping
the water directly into the drain, without sending it into the humidifier. This will eliminate any scale
or processing residues that may cause foam when boiling.
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