83
EN
5.14 Refilling or emptying
5.14.1 REFILL operations
Sime
ALU HE
boilers DO NOT have a device to fill the boiler/
system and an emptying tap. Therefore these must be provided,
during installation, assembled in the most convenient places for
the installer.
Before carrying out the operations described below, make
sure that the main system switch is set to "ON" in order for the
display to show the pressure level in the system during refilling.
– there are no requests for heat
– the main system switch is set to "ON"
– the display shows the system pressure value
– the outlet valve is closed
ON
Fig. 29
– open the water system isolation devices and slowly fill until
you see the value, when cold, of approx. 1.5 bar on the display
– close the water system isolation devices.
5.14.2 EMPTYING operations
– check that the water system isolation devices are closed
– connect a funnelling pipe to the system drain valve and open
it.
when it has fully emptied, close the valve.
– check the pressure on the display and if necessary top up until
the correct pressure reading appears
– fill the siphon disconnecting it from the pipe or using (by
means of) the smoke take-off point.
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