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• Before connecting the pipes, make sure that they do not contain rocks, sand, rust, dregs
or, in any case, foreign bodies which may damage the system.
• It is appropriate to carry out a by-pass in the system in order to be able to perform
washing of the plate exchanger without disconnecting the appliance. The connection
pipes must be supported so that they do not weigh on the appliance with their weight.
3.2.1 - Hydraulic circuit
The hydraulic scheme shows the main parts of the internal unit and a typical hydraulic circuit.
Sanitary water inlet with integrated non-return
Sin
valve
B
Sanitary accumulation
C
ACS circuit compressor
CG
Gas connections
CV
Non-return valve
D
Bypass valve
F
Flow switch
FR
Mains water filter
I
System
Iin
System water inlet
Iout
System water outlet
J
Automatic air purging
M
Manometer
PI
Technical water circulation pump
PS
Sanitary water circulation pump
R
Electric heaters collector
RR
Technical water filling tap
S
Bleed
Sout Sanitary water outlet
Install a sieve filter with 0,4 mm meshes on the water return pipes from the sys-
tem.
EN - 18
SPI
System water plates exchanger
SPS
Sanitary water plates exchanger
T
Thermostat
T1
System water return temperature probe
T2
System water delivery temperature probe
T3
Sanitary boiler temperature probe
T5
Compressor delivery temperature probe
High temperature ACS circuit outlet temperature
T6
probe
ACS T7 circuit evaporator outlet temperature
T7
probe
Ue
External unit
Ui
Internal unit
V3
3 bar safety valve
V6
6 bar safety valve
VEI
System expansion tank
VES
Sanitary expansion tank
VM
Mixer valve
VT
Thermostatic valve
VTV
Three-way valve
Highlighted components are part of addi-
tional kits
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