Atlantic alfea extensa + - 4.2 Filling and purging the installation

gure 28 - Hydraulic unit bleeder valve
P
4.1.3 Volume of the heating system
You must respect the minimum installation water volume.
Install a buffer tank on the return of the heating circuit
in case of lower volume than this value. In the case of
a system equipped with Thermostatic(s) valve(s), it is
necessary to ensure that this minimum water volume
can ow.
Minimum volume in liters BY CIRCUIT (without HP)
HP
Obligation
fan-coil
Recommendation
Radiator
Recommendation
Heating-cooling oor
extensa (duo) 5 23 12 2
extensa (duo) 6 23 12 2
extensa (duo) 8 36 33 15
extensa (duo) 10 49 44 22
extensa (duo) 13 55 50 25
extensa (duo) 16 74 66 35
4.2 Filling and purging the installation
Check the pipe xings, the tightness of the connectors
and the stability of the appliance.
Check the direction in which the water is circulating and
that all the valves open.
Proceed to ll the installation.
Do not operate the circulating pump while lling. Open all
the drain valves in the installation and the bleeder valve
for the hydraulic unit (P) to remove the air contained in
the conduits.
Close the drain and bleeder valves and add water until
the pressure in the hydraulic circuit reaches 1 bars.
Check that the hydraulic circuit has been purged correctly.
Check there is not a leak.
After the "Commissioning", page 44, once the
machine has started, purge the hydraulic unit again
(2 litres of water).
" Precise lling pressure is determined by the
manometric height of the installation.
Installation and operation manual "1734 - EN" - 31 -
Heat pump air/water split 1 service alféa extensa +