36
5.3 Flushing The System
Failure to
fl
ush and add inhibitor to the system will invalidate the appliance working.
All systems must be thoroughly drained and
fl
ushed out using additives – corrosion inhibitors and
fl
ushing agents/descalers.
To
fl
ush out the primary side of this unit.
a.
Fill the boiler as per the
fi
lling instructions.
b.
Using a drain off cock on the lowest point of the system allow the water to drain from the system and
boiler.
c.
In order to
fl
ush the system correctly turn off all radiators open the
fi
lling loop and drain cock simultane-
ously and allow the water to
fl
ow through the boiler.
d.
Open each individual radiator allowing water to
fl
ow through then turn that radiator off and repeat for all
radiators on the system.
e.
Turn off the
fi
lling loop and close the drain cock open all radiators and open the
fi
lling to
fi
ll the system.
f.
Continue to
fi
ll the system until the pressure gauge reaches 1 bar.
To
fl
ush out domestic hot water circuit.
a.
Open all hot water outlets.
b.
Turn on inlet group supply so water enters the boiler; leave to
fi
ll until water is released from the hot water
outlets. Turn off all hot water outlets.
c.
Connect a hosepipe to the cylinder drain cock and open the drain cock.
d.
Allow water to
fl
ow through the boiler and out of the drain cock.
e.
Turn off water supply, disconnect the hosepipe, close the drain cock and re
fi
ll the boiler.
5.4 Filling The Condensate Trap
The condensation trap must be pre-
fi
lled when
starting the boiler for the
fi
rst time in order to
prevent
fl
ue gases from
fl
owing back through
the trap.
The
fi
lling operation is carried out as follows
(see
fi
g. 12):
●
Remove plug
T
and
fi
ll the trap
S
three quar-
ters full with water;
●
Replace plug
T
and connect the drainpipe
P
into a condensate discharge trap conforming
to current legislation;
Attention!
It is recommended to clean the con-
densate trap, after a few months of boiler opera-
tion, to remove deposits/residuals left after the
fi
rst condensate passage within the boiler new
components that may interfere with the correct
operation of the trap itself.
T
S
Fig. 1
12
