i-SHWAK V4
Inverter air/water chillers and heat pumps with wall-mounted indoor unit and remote condensing outdoor unit
21
8.5.2
Schematic diagram of the plant with DHW recirculation
Please note that the management of the DHW recirculation is available only if the additional plant management module (optional
GI2 optional) is present.
Hydronic circuit
Indoor Unit
(models MP /MPR)
To the plant circuit
To the DHW puffer (VDIS1 kit)
Technic water return
P
T
PLANT
DHW
INSTANTANEOUS
PREPARER
(model MPR)
From the DHW-R puffer
To the DHW-R puffer
To
th
e
D
H
W
-R
us
er
W
at
er
sup
pl
y
in
le
t
or
pr
e-
he
at
ed
w
at
er
fr
om
D
H
W
re
ci
rc
ula
ti
on
Water supply inlet
PUFFER
DHW
To the domestic utiliti es
THIS RECOMMENDED CONNECTIONS SHOULD BE PERFORMED BY THE INSTALLER
Additional expansion
vessel (not supplied)
KEY
P
T
P
Expansion
vessel
DHW RECIRCULATION
DHW recirculation
temperature sensor
OUTDOOR UNIT
Circulator
T
Piping connection
for gas and liquid
shall be done by
the installer
Filter with extractables
cartridge
Charging unit with
pressure reduccer device
Discharge valve
3 bar relief valve
Shut-off valve
No return valve
Thermometer
0-6 bar pressure gauge
Anti-scald thermostatic
3-way valve
Domestic water mixer
Loading/Topping up line
All the components inside the dashed line "CONNECTIONS THAT SHOULD BE DONE BY THE INSTALLER" are
indicated but are not supplied.
WARNING: It is recommended to install a 3 bar relief valve (not supplied) as shown in the plant diagram. It is
necessary to install one automatic air vent at the highest point of the plant circuit.
WARNING: It is recommended to install a 3 bar relief valve (not supplied) as shown in the plant diagram. It is
necessary to install one automatic air vent at the highest point of the plant circuit.
If the expansion vessel built-in 8 liters is insufficient to absorb the volume variations system side, install an
expansion tank additional (not supplied).
8.5.3
Particular schematic diagram of the plant with hydraulic separator and mixing valve
To the plant circuit
Plant
A
AB
B
Technic water return
Plant remote sensor
Mixing water sensor
hydraulic separator
KEY
Circolator pump
Discharge valve
Shut-off valve
3-way valve motorized
in two-position
The indicated components are not supplied and their connection should be done by the installer. The remote plant
circuit sensor is always managed. The management of the mixing sensor is possible only with optional module GI2.
For the logic connections of the valve, please refer to control manual supplied with the unit.
8.6
REFRIGERANT CONNECTIONS
The refrigerant connections are equipped with shut off valves on the outdoor unit and designed for flare connections.
How to make the connection:
x
Place the refrigerant pipes; (place the refrigerant pipes, the number of curves should be as low as possible and avoid
throttling of the pipes)
x
bring together the flared ends to their connection located on the indoor and outdoor units;
x
tighten the connections by using the method of ”key against key”;
x
perform a proper evacuation of the refrigerant pipes
using the taps of the moto-condensing unit (similar system to
household split)
