R1
D
MT
CAR
GS
gure 25 - Basic Hydraulic Layout
Key:
CAR: Non-return valve.
D: Shut-o.
GS: Safety valve (mandatory
/ not supplied).
MT: Thermostatic mixer valve.
R1: Heating circuit.
Ø 26x34
1" male
Ø 20x27
3/4" male
4.1.3 Volume of the heating system
You must maintain the minimum installation water
volume. Install a buer tank on the return from the
heating circuit in case the volume is lower than this
value. Where the system is tted with one or more
thermostatic valves, you must ensure that this minimum
water volume is able to circulate.
Min. volume in litres PER CIRCUIT (excl. HP)
Heat Pump
Mandatory
Fan-coil
Recommendation
Radiators
Recommendation
Heating-cooling oor
Alféa Extensa Duo A.I. 5 23 12 2
Alféa Extensa Duo A.I. 6 23 12 2
Alféa Extensa Duo A.I. 8 36 33 15
Alféa Extensa Duo A.I. 10 49 44 22
Installation and Operating Manual "1821- EN" - 31 -
Alféa Extensa Duo A.I. Heat Pump
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