VOKERA Aria Release note

Installation
& Servicing
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Vokèra is a licensed member of the Benchmark scheme
which aims to improve the standards of installation and
commissioning of domestic hot water systems in the UK.
Aria
Air to water heat pump

BUILDING REGULATIONS
This appliance must be installed and serviced
only by a competent person in accordance with
the current: IEE Regulations,
Building Regulation, Building Standards
(Scotland) (Consolidation), Building Regulations
(Northern Ireland), local water by-laws,
Health & Safety Document 63S (The Electricity at
Work Regulations 1989), IS 813 (Eire) and other
local requirements.
The relevant Standards should be followed,
including:
BS EN 15450: Heating systems in buildings –
Design of heat pump heating systems.
BS EN:12828 : Central heating for domestic
premises.
BS EN 7593 : Treatment of water in domestic hot
water central heating systems.
BS EN 14511 : Requirements heat pumps for
space heating and cooling.
BS EN 378 : Safety and environmental
requirements for heat pumps.
The Health and Safety at Work Act 1974.
The Management of Health and Safety at Work
Regulations 1999.
The Construction (Health, Safety and Welfare)
Regulations 1996.
The Construction (Design and Management)
Regulations 1994.
The Lifting Operations and Lifting Equipment
Regulations 1998.
Where no specific instruction is given, reference
should be made to the relevant codes of Practice.
There have been no banned substances
used in the manufacture of these
appliances.
________________________________________________________________
INDEX
1 GENERAL
.....................................................5
1.1 GENERAL PRECAUTIONS
....................................... 5
1.2 FUNDAMENTAL SAFETY RULES
............................ 5
1.3 DESCRIPTION OF THE APPLIANCE
....................... 6
1.4 IDENTIFICATION
...................................................... 7
1.5 TECHNICAL DATA
................................................... 8
1.6 HYDRAULIC DATA
.................................................. 9
1.7 ACCESSORIES
....................................................... 9
1.7.1 Electric heater
............................................... 9
1.8 HEAT PUMP COOLING CIRCUIT
........................... 10
1.9 ELECTRICAL PANEL AND WIRING
DIAGRAM ...... 10
1.9.1 ARIA 6HP / 8HP Models ............ 10
1.9.2 ARIA 11HP Model ........................... 12
2 INSTALLER
................................................ 13
2.1 CONTROL PANEL
................................................... 13
2.2 ACTIVATION & DEACTIVATION
............................. 15
2.2.1 Heating / Cooling activation
......................... 15
2.2.2 Heating / Cooling deactivation
..................... 16
2.3 OPERATIONS PERFORMED WITH
THE REMOTE ON-OFF “SO” and
SUMMER-WINTER “SEI” SWITCHES
..................................................... 17
2.3.1 Cooling function
............................................ 17
2.3.2 Heating function
............................................ 17
2.4 SHUTDOWN FOR LONG PERIODS
....................... 17
2.5 CLEANING
.............................................................. 17
2.6 MAINTENANCE
....................................................... 17
2.7 USEFUL INFORMATION
......................................... 18
2.8 RECEIVING THE PRODUCT
.................................. 18
2.9 DIMENSIONS WITH PACKAGING
.......................... 18
2.10 DIMENSIONS WITHOUT PACKAGING
.................. 19

2.11 HANDLING AND TRANSPORT
............................... 19
2.12 POSITIONING
......................................................... 20
2.12.1 Fixing position of dampers
............................ 21
2.13 HYDRAULIC CONNECTIONS
................................ 22
2.14 POSITION OF THE FIXINGS
.................................. 24
2.15 ELECTRICAL CONNECTIONS
............................... 24
2.16 OUTSIDE CONNECTIONS AND
ELECTRICAL
POWER CABLE INFEED
........................................ 25
2.17 LOADING AND EMPTYING THE
SYSTEM ............ 27
2.17.2 Loading
......................................................... 27
2.17.2 Emptying
....................................................... 44
3 TECHNICAL SERVICE
............................... 28
3.1 RECOMMENDED OPERATING
CONDITIONS
.......................................................... 28
3.2 LIMIT OPERATING CONDITIONS
.......................... 28
3.3 PREPARATION FOR THE FIRST
STARTING UP
........................................................ 29
3.4 FIRST START-UP
.................................................... 29
3.6 ACTIVATION OF “SO” AND “SEI”
CONTROL ......... 30
3.6.1 Setting the “SO” remote control
.................... 30
3.6.2 Setting the “SEI” remote control
.................... 30
3.7 ANOMALY SIGNALS
............................................... 30
3.7.1 Manual anomaly reset
................................... 31
3.8 ACTIVATION and DEACTIVATION
OF THE UNIT
..........................................................31
3.9 OPERATIONS PERFORMED BY THE
ON-OFF “SO” AND SUMMER-WINTER
“SEI”
REMOTE SWITCHES
............................................. 33
3.10 DEFROSTING CHECK
............................................ 34
3.11 CONTROLS DURING AND AFTER
THE FIRST
START-UP
............................................................... 34
3.12 LONG TERM SHUTDOWN
..................................... 34
3.13 ROUTINE MAINTENANCE
..................................... 34
3.14 EXTRAORDINARY MAINTENANCE
....................... 34
3.14.1 Loading coolant gas
...................................... 34
3.14.2 Compressor
.................................................. 35
3.15 DISPLAY AND CONTROL
PARAMETERS ............. 35
3.15.1 Main parameters and variable
characteristics ...............................................
35
3.15.2 Access and modification of
parameters ........ 35
3.16 TROUBLESHOOTING
............................................. 36
1 GENERAL 1 GENERAL

The following symbols are used in some parts of the booklet:
ATTENTION = for actions that require special precautions and an adequate preparation
FORBIDDEN = for actions that must NOT be carried out
1.1 GENERAL PRECAUTIONS
After removing the packing, check the
integrity and completeness of the contents. If
they do not correspond, contact the Vokera
agency that sold the unit.
Vokeraappliances must be installed by
companies that are enabled in accordance with
legislations in force,and on completion of the
work, a declaration of conformity must be given
to the owner certifying that the installation has
been done correctly and in accordance with the
legislation in force and the indications given by
Vokerain the instruction booklet supplied with the
appliance.
These appliances have been built for
heating or climatisation of environments and
must be destined for this use, compatibly with
their performance characteristics.
The manufacturer accepts no
responsibility, either contractual or extra
contractual, for damage to persons, animals or
property arising from incorrect installation or
adjustment, maintenance or improper use.
Should water leak from the unit, turn the
unit master switch to “OFF” and close the water
taps. Urgently call the Vokera service department
or professionally qualified personnel and under
no circumstances intervene personally on the
unit.
These units contain R410A refrigerant
gas; take great care not to damage the gas circuit
and the finned battery. If the refrigerant gas
escapes, set the system master switch to
“OFF” and call immediately the Vokeratechnical
service, or other qualified personnel; do not
intervene personally on the unit.
If the equipment is not used for a long
period, the following operations should be carried
out:
- Turn the system master switch to “OFF”
- Close the water taps
- If there is the risk of freezing, make sure that
anti-freeze liquid has been added, otherwise
empty the system.
This instructions booklet is an integral part
of the unit and consequently must be kept with
care and must ALWAYS accompany the unit,
even when this is transferred to another owner or
user or transferred onto another system. If it gets
damaged or lost, request another copy from the
local Vokera technical service.
Repair or maintenance interventions must
only be carried out by the Vokeratechnical service
or personnel qualified according to the provisions
of this manual. Do not modify or tamper with the
unit as this could cause situations of danger and
the manufacturer shall not be responsible for any
damaged caused.

1.2 FUNDAMENTAL SAFETY RULES
The use of products that use of electricity and
water requires the observation of some
fundamental safety rules such as:
Do not allow children to operate this unit.
Do not touch the unit if barefoot or with
parts of the body that are wet or humid.
Do not clean the unit without first
disconnecting it from the mains power supply by
switching the system master switch to “OFF”.
Do not modify or adjustment units without
authorisation and the indications of the
manufacturer.
Do not pull out or twist the electric cables
coming out of the unit, even when disconnected
from the mains power supply.
Do not introduce objects or substances
through the aspiration grills or the air outlets
Do not open the access flaps to the inner
parts of the unit without first having set the
system master switch to “OFF”.
Do not leave the packaging material
within the reach of children as it can be a source
of risk.
Before undertaking any maintenance
intervention on the unit, it is compulsory to cut
“OFF” the mains electrical supply by setting the
double pole master switch on the system to
“OFF”.
Do not spray or tip water directly onto the
unit.
Do not climb onto the unit or rest any
object on it.

1.3 DESCRIPTION OF THE APPLIANCE
The VokeraARIA heat pumps are available with
single phase power supplies, capable of
producing both hot water for heating and cold
water for cooling domestic, residential
environments and equipped with supplementary
electrical resistances which allow correct
functioning even in the most critical
environmental conditions They are best suited for
under floor heating or low temperature systems.
They use an internal Scroll type rotary
compressor mounted on anti-vibration supports
and located in a special compartment,
electronically controlled variable speed helical
fans that ensure silent high performance. The
user side plate exchanger in AISI 316 stainless
steel is insulated with an anti-condensation
coating and fitted with a flow regulator. The units
are fitted with various safety devices such as
pressure switches, flow gauge, sensors, specific
circuit breakers etc. An electronic device with
microprocessor control manages the operation.
The models are supplied with inertial storage built
into the unit.
Legend fig. 1
1 Electrical panel 8 Expansion valve (winter)
2 Control panel 9 Scroll compressor
3 Thermo magnetic switch 10 Hydraulic kit
4 4 way-valve 11 Pump
5 Dehydrator filter 12 Axial fan
6 Flow switch 13 Electric heater
7 Expansion valve (summer)

1.4 IDENTIFICATION
The VokeraARIA unit can be identified by:
- Technical plate (fig. 2) It indicates the
technical and performance data of the
unit.
- The tampering with, removal or
lack of the technical plate or anything
else that makes a certain product
identification impossible will make
correct maintenance or installation
operations more difficult.
1.5 TECHNICAL DATA
Models
DESCRIPTION 6HP 8HP 11HP
Thermal power (1) kW 6.8 8.3 11.0
Absorbed power (1) kW 1.74 2.11 2.81
(1) outside air d.b. + 7°C / w.b. + 6°C, water 35-30°C.
Thermal power (2) kW 5.9 7.2 9.5
Absorbed power (2) kW 1.78 2.2 2.90 (2) outside air + 0°C, water 35 - 30°C
Thermal power (3) kW 5.0 6.2 8.0
Absorbed power (3) kW 1.79 2.26 2.97
(3) outside air - 7°C, water 35 - 30°C
Thermal power (4) kW 6.6 8.1 10.6
Absorbed power (4) kW 2.14 2.68 3.5 (4) outside air + 7°C, water 45 - 40°C
Thermal power (5) kW 5.6 7.1 9.3
Absorbed power (5) kW 2.16 2.77 3.6 (5) outside air + 0°C, water 45 - 40°C
Thermal power (6) kW 7.5 10.3 13.0
Absorbed power (6) kW 1.8 2.28 2.93 (6) outside air + 30°C, water 18 - 23°C
Thermal power (7) kW 6.9 9.3 11.8
Absorbed power (7) kW 2.0 2.72 3.46
(7) outside air d.b. + 35°C / w.b. +24°C, water 18 -
23°C
Thermal power (8) kW 6.0 8.2 10.2
Absorbed power (8) kW 1.76 2.34 3.01 (8) outside air + 30°C, water 7 - 12°C
Thermal power (9) kW 5.3 7.1 9.3
Absorbed power (9) kW 2.04 2.81 3.58
(9) outside air d.b. + 35°C / w.b. +24°C, water 7 -
12°C
Empty
weight Nominal water
flow
Diameter
hydraulic
fittings
Tank
capacity Electric heater Power voltage Protection rating Axial fan Nominal air flow Noise level Refrigeration load
6HP 110kg 1.0
m³/h ¾” 16
litres 3kW 230~ IP44 1 3.300 m³/h 58db (A) 1.7kg
8HP 112kg 1.2
m³/h ¾” 16
litres 3kW 230~ IP44 1 3.250 m³/h 58db (A) 1.9kg
11HP 164kg 1.6
m³/h 1” 36
litres 6kW 230~ IP44 2 6.500 m³/h 62.8db (A) 2.7kg
SCRIPTIONODELLO / MODELS

1.6 HYDRAULIC DATA
The following diagram (fig. 3) indicates the
residual prevalences with the nominal water flow
± 20%.
1.7 ACCESSORIES
The accessories indicated below must be
ordered separately
ACCESSORIES CODE
Remote control Kit 4014762
Anti-vibration supports Kit 4015360
Snow protection 6HP – 8HP 4014763
Snow protection 11HP - 4014764
Soft Start Kit 4014766
Hot water thermostat kit 4014767
1.5 kW single phase electric heater 4383270
1.7.1 Electric heater
The electric heater is integrated into the heat
pump to ensure continuity of service and is
inserted through a special plug into the storage
tank.
It is enabled to facilitate the compressor during
the start-up phase (it keeps the water at a set
temperature value (e.g. 30°C) and when the
atmospheric conditions become particularly
critical for correct machine operation (continual
frost caused by the low temperature and
excessive humidity).

1.8 HEAT PUMP COOLING CIRCUIT
1 Fan 9 Plate exchanger
2 Finned battery (evaporator) 10 4 way-valve
3 Non-return valve 11 High pressure safety pressure-switch
4 Thermostatic valve (summer cycle) 12 Compressor
5 Thermostatic valve (winter cycle) 13 Liquids container
6 Filter 14 Low pressure safety pressure-switch
7 Fluid indicator 15 Pressure transducer
8 Flow switch 16 Safety valve
1.9 ELECTRIC PANEL AND WIRING
DIAGRAM
1.9.1 ARIA 6HP / 8HP Models
The units are equipped with an electric panel
consisting of the following components:
Factory installed components
CM Run condenser
CV1 Fan condenser
KM1 Compressor contactor
KM2 Resistance contactor
MI Control panel
Q1 Master circuit breaker
Q2 Support resistance circuit breaker
C Compressor
F1 Control safety fuse
F2 Pump safety fuse
F3 Resistance safety fuse
Conn.A Input terminal board
Conn.B Loads output terminal board
P Circulator
PD Flow switch
Tp Safety thermostat
TR Auxiliary circuits transformer
SP3 Pressure transducer
ST1 Temperature probe in exchanger inlet
ST2 Temperature probe in exchanger outlet
ST4 Outside air temperature probe
PA High pressure pressure-switch
PB Low pressure pressure-switch
VIC 4 way-valve
Rp Plate exchanger resistance
Rc Compressor cover resistance
Rs Support resistance
R1 / R2 Rp relay/boiler contact auxiliary relay
V1 Fan

Components to mount on installation (not supplied with the unit)
AL Remote alarm signal (output 12V DC max 20mA)
FL Outside flow switch
SEI Remote SUMMER-WINTER switch
SO Remote ON-OFF switch

1.9.2 ARIA 11HP Model
Factory installed Components
CM Run condenser
CV1/2 Fan condenser
KM1 Compressor contactor
KM2 Resistance contactor
KM3 Pump contactor
MI Control panel
Q1 Master circuit breaker
Q2 Support resistance circuit breaker
C Compressor
F1 Control safety fuse
F2 Pump safety fuse
F3 Resistance safety fuse
Conn.A Inputs terminal board
Conn.B Loads output terminal board
P Pump / Circulator
PD Flow switch
Tp Safety thermostat
TR Auxiliary circuits transformer
SP3 Pressure transducer
ST1 Temperature probe in exchanger inlet
ST2 Temperature probe in exchanger outlet
ST4 Outside temperature probe
PA High pressure pressure-switch
PB Low pressure pressure-switch
VIC 4 way-valve
Rp Plate exchanger resistance
Rc Compressor cover resistance
Rs Support resistance
R1 / R2 Rp relay/boiler contact auxiliary relay
V1/2 Fan
Components to mount on installation (not supplied with the unit)
AL Remote alarm signal (output 12V DC max 20mA)
FL Outside flow switch
SEI Remote SUMMER-WINTER switch
SO Remote ON-OFF switch

2.1 CONTROL PANEL
The control panel can be used to make all the
adjustments necessary for the heat pump
operation and display the values of the main
parameters and the alarms. It is located on the
front panel of the electric panel inside the unit
and is accessible through a flap positioned on the
inspection panel.
Display:
During normal operation it indicates the
temperature of the water returning from the
system.
It can also indicate the value of all the set
parameters and the code of any alarms.
Fig. 15
A
Alarm
B
Mode (Heat, Cool, etc....)
C
Economy (configurable)
D
Clock
E
Unit of measure
F
Navigation in the menu
GResources (Compressor, Fans, etc....)

KEYS Pressure with immediate
release
Symbol printed on
front panel
Prolonged pressure (if key
is suitably configured)
Scrolls the items in the
menu, increases the values
of the parameters
Defrosting request
Scrolls the items in the
menu, decreases the
values of the parameters
Switching on/off of the unit
(and vice versa)
Manual alarm rearm
Access to machine status
menu (setpoint, AI, DI, DO,
hours completed, pump
hours, etc....), access to
submenus, access to
parameter value,
confirmation of parameter
value
avail Accesses the fundamental
Display configuration file
Exit from menu, parameters
list, parameter value and
return to upper level
mode Accesses operating
mode selection file
(Heat/Cool/Std-by)
Accesses
programming
menu
SET used for:
• Access to machine status menu
• Access to sub-menus
• Access to parameter value
• Confirmation of parameter value or exit
• prolonged pressure accesses the menu for the
selection of the fundamental display (if the key is
configured for this function); with the up and
down keys the options present can be displayed
(with display based on the machine configuration)
and pressure on the “set” key confirms the
selection.
UP used for:

• scrolling up the display of files and parameters
• Increase of the parameter value (if in parameter
value modification)
• Prolonged pressure accesses the function
called manual defrosting (if the key is configured
for this function), only from fundamental display.
DOWN used for:
• Scrolling down the display of files and
parameters
• Decrease of the parameter value (if in
parameter modification)
• Prolonged pressure switches the unit on/off
from fundamental display (if the key is configured
for this function)
ESC used for:
• Exit from the menu, from the parameters list,
from the parameter value without saving the
value and return to the previous level. Prolonged
pressure from fundamental display (if the key is
configured for this function) accesses the file for
changing the mode; with the UP and DOWN keys
displays the modes present (with display based
on the machine configuration) and pressure on
the SET key to confirm the selection made.
SET + ESC simultaneously to
access the parameters, functions, password etc
files.
UP + DOWN simultaneously to
rearm alarms when present.
2.2 ACTIVATION AND DEACTIVATION
After the first start-up by the Vokeratechnical
service the ARIA heat pump is adjusted for
“automatic” operation and no other interventions
are necessary. Therefore the plant manager must
perform the ACTIVATION and DEACTIVATION
operations by intervening on the control panel or
acting on the remote switch (if present).
To access the control panel, open the flap as
follows:
- Remove the locking screw (fig. 16 ref. A)
- Simultaneously press on points B (fig. 16 ref. B)
and lift the flap (fig. 16 ref. C)
When operations on the control panel are
completed:
- Close the flap and reposition the locking
screw.
After powering up the unit, “OFF” will appear
on the display.
Press the key to enable the machine in
stand-by, now the circulation pump should switch
on and the display will show the temperature of
water returning from the system.
Now proceed as follows:
2.2.1 Heating/cooling activation
To select the operating mode hold down the
key until the message “HEAT”, “COOL” or
“STBY” appears, according to the current
operating status of the controller.
Select with UP or DOWN the HEAT
function and confirm with the SET key.
Heating (WINTER CYCLE) -By selecting HEAT
the symbol lights up.
Cooling (SUMMER CYCLE) -By selecting COOL
the symbol lights up.

2.2.2 Heating/cooling deactivation
Keep pressed for a few seconds until the
message “COOL” or “HEAT” appears (cycle
enabled). Select with the “STBY” key and
confirm with the SET key; the symbol
lights up.
To change the Heating/Cooling operating
mode on the heat pump models, it is advisable to
call the Vokera technical service.
2.3 OPERATIONS PERFORMED WITH THE
REMOTE ON-OFF “SO” and SUMMERWINTER
“SEI” SWITCHES (IF PRESENT).
2.3.1 Cooling function
Activation
- Position the SUMMER-WINTER
remote switch (SEI) to “OFF”.
- Position the ON-OFF remote
switch (SO) to “ON”.
The warning LED on the control
panel lights up.
Deactivation
- Position the ON-OFF remote switch (SO) to
“OFF”.
The message “OFF” appears and
flashes on the CONTROL PANEL.
2.3.2 Heating function
Activation
- Position the SUMMER-WINTER
remote switch (SEI) to “ON”.
- Position the ON-OFF remote
switch (SO) to “ON”.
The warning LED lights up on the control
panel.
Deactivation
- Position the ON-OFF remote
switch (SO) to “OFF”.
The message “OFF” flashes on the
CONTROL PANEL.
In case of a power failure lasting more
than four hours, when power returns, keep the
unit powered but deactivated for at least eight
hours.
In case of a power failure lasting less than
four hours, when power returns, keep the unit
powered but deactivated for the same number of
hours that the power was out.
2.4 SHUTDOWN FOR LONG PERIODS
If the ARIA heat pump is not used for a long
period, the following operations should be
performed:
- From the control panel, deactivate the unit it
whichever mode it is operating in.
- Position the remote switch to “OFF” (if present)
After deactivating the unit:
- Deactivate the indoor terminal units by setting
the switch on each appliance to “OFF”.
- Set the system master switch to “OFF”.
- Close the water taps.
If there is a possibility that the outside
temperature falls below zero there is a risk of
freezing.
The hydraulic system MUST BE EMPTIED or
else antifreeze liquid (e.g. ethylene glycol) must
be added in the doses suggested by the
manufacturer of the liquid. It advisable to contact
the Vokera technical service.
To start the unit up again after a long
period of inactivity, contact the Vokera technical
service.
2.5 CLEANING
The only essential cleaning that the plant
manager needs to perform is on the outside
panels of the cooler; this should be done with a
cloth and soap and water. For persistent stains
damp the cloth with a solution of 50% methylated
spirit or a specific product in water. When the
cleaning is completed, carefully dry the surfaces.
Do not use sponges with abrasive
products or powder detergents.
Do not perform cleaning operations until
the unit has been disconnected form the mains
power supply by turning the master switch on the
system to “OFF”.
2.6 MAINTENANCE
Routine maintenance is indispensable to
maintain the efficiency, safety and reliability over
the years. This can be carried out every six

months, for some interventions and annually
others, by a competent person or by the Vokera
technical service that is technically prepared and
authorised and always has original spare parts
available when necessary.
for
For installations close to the sea, perform
the maintenance interventions twice as often.
Before starting any maintenance
interve o cut off
7 USEFUL INFORMATION
...............................................................
s
................................................................
.....................................................................
...............................................................
.
...................................................................
................................................................
........................................................................
ervice and assistance:
...................................................................
................................................................
ntion on the unit, it is compulsory t
the mains power supply by turning the double
pole master switch on the system to “OFF”
.
2.
Vendor:
................
.........
Addres
...............
...............
Tel.
..........
...............
Installer:
................
.......
Name
............
................
Address
...............
...............
tel.
.......
................
Technical s
..............................................
Name.
............
................
Address
...............
...............
tel.
...............................................................................
................
DATE INTERVENTION
2.8 RECEIVING THE PRODUCT
The ARIA heat pumps are delivered in a single
package on a wooden pallet, protected by
cardboard packaging and accompanied by:
- instruction manual
- warranty certificate
- label with bar code
- first start up
- spare parts list.
The instruction manual is an integral part
of the unit and it should be read and then kept
with care.
It is advisable to position the unit in the
place of installation before removing the
packaging.
Do not dump packaging materials in the
environment or leave them within reach of
children as they are potentially dangerous.
2.9 DIMENSIONS WITHOUT PACKAGING
See page 8 for the weights.
Dimensions (mm) 6HP 11HP
8HP
L (mm) 040 12401
H (mm) 805 1000
P (mm) 378 428
L1 (mm) 1100 1300
P1 (mm) 425 472
P2 (mm) 890 1040
Return / inlet 3/4" 1"
(inch)
Reintegration 1/2" 1/2"
(inch)
•P2: Dimensions with snow protection

2.10 DIMENSIONS WITH PACKAGING
Dimensions
(mm)
6HP
8HP
11HP
L (mm) 1140 1340
H (mm) 950 1150
P (mm) 480 540
2.11 HANDLING AND TRANSPORT
The handling and transport must always be
carried out with the unit in a horizontal position. If
a fork lift truck is used, insert two metal pipes in
the special holes in the base and use suitable
lifting means. If a crane is used, pass the ropes in
the upper part of the wooden base taking care
not to apply pressure on the unit (fig. 18).
It is advisable to position the unit in the place of
installation before removing the packaging.
When the packaging has been removed,
handling is done by inserting two metal pipes
(max diameter 33 mm, min thickness 3.2 mm) in
the special holes in the base and use suitable
lifting means.
The weight of the unit is unbalanced
towards the compressor side (electrical panel
side).
During transport, the unit must always be
kept in a vertical position.
Handling must be performed by qualified
personnel, adequately equipped and with tools
that are suitable for the weight of the unit.
Instructions for lifting
- Make sure that all the panels are well fixed
before moving the unit.
- Before lifting, check the weight of the unit on the
CE label.
- Use all the lifting points indicated, and only
those.
- Use ropes of equal length.
- Handle the unit with care and without jerky
movements.

2.12 POSITIONING
The position of the ARIA appliances must be
decided by the system designer or by a suitable
expert and must consider both the purely
technical issues and any local legislation in force
which foresees special authorisations (e.g. urban
planning, building regulations, environmental
pollution etc.).
It is therefore advisable to obtain all necessary
authorizations before starting the installation.
The appliances must be:
- Positioned on a flat surface capable of
supporting the weight.
- Positioned on a slab that is sufficiently rigid and
that does not transmit vibrations to any rooms
that are adjacent or below.
It is advisable to place a rubber mat between the
appliance and the slab (hardness 60 shores,
thickness 10 mm) or use the antivibration damper
supports available as accessories.
The unit is designed to be installed outside and
must be placed in a safe area as shown in the
figure below.
The spaces indicated are necessary to avoid air
currents and allow normal cleaning and
maintenance operations.
It is advisable to avoid:
- installation in wells or enclosed areas
- obstacles or barriers that could cause the
recycling of expelled air
- installation in areas with aggressive
atmospheric conditions
- installation in narrow areas where the noise
level of the appliance could be amplified by
reverberations or resonance
- installation in areas subject to the accumulation
of dust, leaves or anything that could reduce the
efficiency of the appliance by obstructing the air
flow
- situations where the expulsion of air from the
appliance can penetrate into adjacent inhabited
areas through doors or windows, provoking
inconvenience to persons.

Dimensions
(mm)
6HP
8HP
11HP
A 1000 1200
B 500 600
C 1000 1000
D 600 800
In the case of several appliances side by
side on the battery side, add up the safety
distances.
When the snow hood is present, re-
calculate the distances with the accessory
installed.
Do not position the appliances with the
inlet of the fan of the first towards the finned
battery of the second.
2.12.1 Fixing position of dampers
See figure 20 with the relative models.

2.13 HYDRAULIC CONNECTIONS
The choice and installation of components must
be made by the installer who acts in accordance
with good technical code of practice and
legislation in force.
Before connecting the pipes, ensure that they do
not contains pebbles, sand, rust, waste or foreign
bodies that could damage the system.
Hydraulic diagram for connection to the system
- ARIA 6HP / 8HP (fig. 21)
- ARIA 11HP (fig. 22)
For the electrical connection of the 3-way
valves see the ACS thermostat kit instructions
Legend fig. 21/22
1 Pressure gauge 8 Air breather
2 Anti-vibration joint 9 Expansion tank
3 Interception valve 10 Temperature probe
4 Net filter 11 Load/Reintegration
5 Flow controller 12 Discharge tap
6 Pump 13 Calibration bypass
7 Safety valve 14 Flow switch