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Ductable air-cooled scroll
chillers and heat pumps
Installation hydraulic diagram
The design of the hydraulic circuit must observe the operating conditions
(fl ows - pressure drops).
- The direction of water circulation
must be observed as indicated on
the stickers on the unit.
- The diameters of the unit hydraulic connections can be referred in
the tables of "Technical characteristic" .
- It is advisable to use fl exible hoses for connecting the piping to the
unit in order to reduce the transmission of vibrations to the building
to the greatest degree. It is mandatory to assemble hoses if the unit
is installed over shock absorbers. Optionally, a fl exible hydraulic
connections kit can be supplied.
- The pipe layouts must be set out with the lowest possible number
of bends to minimise pressure drops. The pipes must be correctly
supported to prevent exerting excessive force on the unit connections.
- Before insulating the tubes and charging the system perform a
preliminary check to verify that there are no drops in the installation.
- The pipes must be carefully insulated to prevent leaks and
condensation. Ensure that the material used is steam barrier type.
Otherwise, cover the insulation using appropriate protection.
- The water must be analysed and the circuit must be set out according
to the results. If necessary, an expert in water treatment must be
consulted (see section on corrosion behaviour).
- In installations to open circuits, if it is not possible to maintain
the water conditions within the values indicated in the corrosion
behaviour table featured, it will be necessary to install an
exchanger that separates the unit circuit from the circuit of the
water circuit to be dealt with by using materials compatible with
these characteristics, whether stainless steel or titanium.
- Plan the anti-freeze protection for the installation when the outdoor
temperature is low: water with anti-freeze, thermal insulation of the
hydraulic circuit, electrical heaters in the hydraulic circuit, draining
from the installation when the unit does not work, etc.
• 30PA/PH version
Schematic diagram of the hydraulic
circuit
PLATES
CIRCUIT
EXCHARGER
DRAINAGE
DIFFERENTIAL
SHUT-OFF
PRESSURE SWITCH
VALVE
In this case the installer must set up the complete hydraulic circuit
with all the components: thermal buffer tank, motorised pump group,
expansion vessel, safety, regulation, cut-off and draining valves, air
bleeder valve, etc.
It is also necessary to install a fi lter in the hydraulic power
supply to the unit in order to prevent clogging of the plate
exchanger. Non-compliance with this recommendation can
cause reduced fl ow which can lead to freezing and breaking
of the exchanger.
18
Both at the inlet and the outlet of the unit, install thermal pressure
gauges which enable supervising the operation of the installation,
or at least plan the installation of these.
Note: optionally, a kit can be supplied with :
- A stainless steel mesh fi lter (500 microns).
- Cut-off and water regulation valves.
- Flexible hydraulic connections of 500 mm.
25
20
15
10
9
8
7
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5
4
3
2
1
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4
5
25
20
15
10
9
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6
5
4
3
2
1
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8 9
10
15
20
6
7
8 9
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20
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