i-SHWAK V4 Inverter air/water chillers and heat pumps with wall-mounted indoor unit and remote condensing outdoor unit
17
Suspended positioning
x In the case of suspended installation, adequate brackets must
be used to support the weight of the unit and also depending
also on the type of the wall to which should be fixed.
x Make sure that the section of the wall doesn’t overlap to
bearing elements of construction, pipelines or power lines.
(2) brackets for positioning (not supplied with the unit)
Both units must be positioned on a leveled surface; the holders used for installation must be able to support its
weight.
8.4 HYDRAULIC CONNECTIONS
The hydraulic connections have to be installed in accordance with national and/or local regulations; pipes can be made up of steel,
galvanized steel or PVC. Pipes have to be designed depending on the nominal water flow and on the hydraulic pressure drops of
the system. All pipes have to be insulated with closed-cell material of adequate thickness. It is recommended to connect the
indoor unit to the piping using flexible joints. The hydraulic circuit should include the following components:
x Hole thermometers to monitor the circuit’s temperature.
x Manual shut-off valves to separate the chiller from the hydraulic circuit.
x Loading group and unloading valve.
x Anti-vibration joints and supports for the piping where necessary.
WARNING: make sure that the size of the pipes shall not exceed the maximum head loss on the plant side given in
the table in the Paragraph 14.3 (see the available head pressure data).
WARNING: connect the pipes to their attacks always by the way of key against key method.
WARNING: The integrated expansion vessel on the plant side has a limited capacity of 8 liters. The installer should
verify that if the expansion vessel is adequate to the real capacity of the plant circuit, otherwise should be provide
an additional expansion vessel.
For the installation position of the expansion vessel (indicated as additional expansion vessel), please refer to
Paragraph 8.5.
WARNING: check that the weight of the pipes does not grave about the structure of the machine.
WARNING: the water return pipe should be in correspondence with the connection labelled: ”TECHNIC WATER
RETURN”, otherwise the evaporator may freeze.
WARNING: If the water flow switch (factory mounted) is altered or removed, the warranty will no longer be valid.
Please refer to the wiring diagram for the water flow switch electric connections.
The metallic Y-filter must be kept clean, so make sure that it is still clean after the installation of the unit, and then
check it periodically (see Paragraph 24.1).
The water on the loading/topping up pipe must be opportunely pre-filtered from any suspended particles and
impurities through the use cartridge filter (washable, wrapped wire, etc.) of at least 100 microns.
Check the water hardness with which you load and top up the plant circuit. With particularly hard water, in this
case it is necessary to utilize a water softener. For treating water for the plant, please refer to UNI 8065.
The heating system and safety relief valves must meet with the requirements of regulation EN 12828.
8.4.1 Hydraulic circuit
FS
D
To th e p lant
W at er
supply
inlet
FM
Technic
w ater
retu rn
D IV ERTE R VALV E
(VD IS1 kit)
H eat exch a n ger
R410A / e a u
D H W
exch a n ger
R
Liquide
pipe
Gas
pipe
From th e
D H W -R
puffer
From th e
D H W -R
puffer
To th e
D H W -R
puffer
To th e
D H W -R
user
H YDR O NIC C IR UIT INDOOR U N IT (m odels M P / M PR)
DH W INSTANTANEO US PREPA RER
(M O DELLO M PR)
1
2
3
4
5
8 liters expansion vessel
Y-filter with metallic mesh of 1000µ
Opetional auxiliary E-heater with
double protection thermostat
Heat exchanger inlet sensor
Heat exchanger outlet exchanger
Primary circuit inlet sensor DHW-R
Secondary ciruit sensor DHW-R
Secondary circuit outlet sensor DHW-R
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