Accorroni GREEN 220 User manual

GREEN 220 - 220 S - 220 DS
Monobloc heat pump water heater with domestic
hot water storage tank for internal installation
GREEN 220 - 220 S - 220 DS
INSTALLATION MANUAL

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15 11-2021 AL.B A.R. Add data kboll of the tank, update layout
Rev Date Edited by Approved by Notes
Code Serie
MUI01110D6120 DHW heat pump with storage tank

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Contents
1.PURPOSES AND CONTENT OF THIS MANUALS ............................................................. 5
1.1 HOW TO KEEP THE MANUAL .................................................................................... 5
1.2 GRAPHIC SYMBOLS USED IN THE MANUAL ............................................................ 5
2.NORMATIVE REFERENCES............................................................................................... 5
3.PERMITTED USED ............................................................................................................ 5
4.GENERAL SAFETY GUIDELINES ....................................................................................... 5
4.1 WORKERS' HEALTH AND SAFETY .............................................................................. 6
4.2 PERSONAL SAFETY EQUIPMENTS............................................................................. 6
4.3 SAFETY SYMBOLS....................................................................................................... 7
4.4 REFRIGERANT SAFETY DATA SHEET ......................................................................... 8
5.GENERAL CHARACTERISTICS .......................................................................................... 9
5.1 FLEXIBILITY AND BENEFITS OF GREEN INSTALLATION ........................................9
5.2 COMPACT DESIGN ..................................................................................................... 9
5.3 AVAILABLE MODELS .................................................................................................. 9
5.4 AVAILABLE ACCESSORIES ........................................................................................ 10
6.TECHNICAL CHARACTERISTICS ..................................................................................... 10
7.ITEMS CONTAINED INSIDE THE PACKAGING ............................................................... 10
8.OVERVIEW OF THE UNIT ............................................................................................... 11
8.1 PARTS AND DESCRIPTIONS ..................................................................................... 11
8.2 DIMENSIONS ............................................................................................................ 11
8.3 CABLE GLANDS.........................................................................................................13
8.4 HOW TO REPLACE THE MAGNESIUM ANODE ....................................................... 13
8.5 REGULATION THERMOSTAT OF THE ELECTRIC HEATING .....................................14
8.6 HYDRAULIC AND GAS CIRCUIT DIAGRAM ............................................................. 14
8.7 GAS CIRCUIT DIAGRAM........................................................................................... 15
9.INSTALLATION ................................................................................................................ 15
9.1 GENERALITY .............................................................................................................15
9.2 SAFETY INSTRUCTIONS ........................................................................................... 15
9.2.1 Warning ..................................................................................................................16
................................................................................................................... 16
9.3 HANDLING OF THE UNIT ......................................................................................... 16
............................................................................16
9.3.2 Manual handling of the unit................................................................................... 16
9.4 REQUIRED SERVICE SPACE ...................................................................................... 17
9.5 INSTALLATION SCHEME........................................................................................... 18
9.6 HYDRAULIC CONNECTIONS .................................................................................... 19
................................................................................................. 19
9.6.2 Water loading......................................................................................................... 20
9.6.3 Water draining........................................................................................................ 20
............................. 20
.................................................................. 21
9.7 ELECTRICAL CONNECTIONS .................................................................................... 22
10.START UP ...................................................................................................................... 23
2411 USE OF THE UNIT .....................................................................................................

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11.1 USER INTERFACE.................................................................................................... 24
11.2 OPERATION ............................................................................................................ 24
11.3 LCD ICONS .............................................................................................................. 26
11.4 MAIN LOGICS ......................................................................................................... 27
.......................................27
11.4.2 External pump ...................................................................................................... 27
11.4.3 Flow switch........................................................................................................... 27
............................................................................................. 27
...................................................................................... 27
11.4.6 Auxiliary electric resistance.................................................................................. 28
11.4.7 ON/OFF contact.................................................................................................... 29
................................................ 29
11.5 CHECKING PARAMETER SETTINGS ....................................................................... 29
11.6 UNIT MALFUNCTION AND ERROR CODES ........................................................... 30
12.MAINTENANCE AND PERIODICAL CONTROLS .......................................................... 31
12.1 ENVIRONMENTAL PROTECTION ........................................................................... 31
13.TROUBLESHOOTING .................................................................................................... 32
14.DECOMISSIONING ....................................................................................................... 32
15.TECHNICAL CHARACTERISTICS ................................................................................... 33
16.HEAT PUMP OPERATING LIMITS ................................................................................ 34
17.WIRING DIAGRAM ....................................................................................................... 35
17.1 STANDARD CONNECTION ..................................................................................... 35
17.2 CONNECTION OF AN AUXILIARY POWER SOURCE ............................................. 36
17.3 CONNECTION OF AN AUXILIARY ENERGY SOURCE VIA AN EXTERNAL
SELECTOR SWITCH ............................................................................................... 37
18.PRODUCT SHEET EU REGULATION 812/2013 ............................................................ 38
19.TECHNICAL PARAMETERS EU REGULATION 814/2013 .............................................. 38

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1. PURPOSES AND CONTENT OF THIS MANUALS
-
The company, therefore, is not constrained to update the manuals for previous versions of machines.
-
tenance.
1.1 HOW TO KEEP THE MANUAL
The manual has to be always kept with the unit it refers to. It has to be stored in a safe place, away from the dust and moisture. It has to be
Any updates sent to the customer must be kept as an annex to this manual.
regarding the use and maintenance of its machines.
1.2 GRAPHIC SYMBOLS USED IN THE MANUAL
-
ment in complete safety.
2. NORMATIVE REFERENCES
-
ised standards:
•
• Norms: EN 60335-2-21; EN 60335-2-40; EN 55014-1; EN 55014-1 ; EN 61000-3-2; EN 61000-3-3.
renewable sources:
•
•
• Standard UNI EN 16147:2017.
3. PERMITTED USED
• The company excludes any contractual and no-contractual liability for damage caused to persons, animals or things, by incorrect installa-
• -
ered improper and therefore not allowed.
• -
•
4. GENERAL SAFETY GUIDELINES

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It’s strictly forbidden to remove and/or tamper with any safety device. Do not remove the grilles located on the fan outlet or
Children and unassisted disabled persons are not allowed to use the appliance.
Do not touch the appliance when barefoot or with wet or damp parts of the body.
Do not pull, detach or twist the electrical cables coming from the unit, even if it is disconnected from the mains supply.
Do not stand with your feet on the device, sit down and/or lean on any type of object.
Do not spray or pour water directly on the device.
supply.
Do not place your hands or insert screwdrivers, spanners or other tools on moving parts.
4.1 WORKERS' HEALTH AND SAFETY
2009/104/CE, 86/188/CEE and 77/576/CEE, which each employer is obliged to respect and enforce. It is recalled that:
absolve the manufacturer of any civil or criminal liability.
Using components, expendable materials or spare parts that do not correspond to those recommended by the manufacturer
and/or listed in this manual may be dangerous for the operators and/or damage the machine.
-
ance with the requirements of the laws in force.
GREEN 220 - 220 S - 220 2S
4.2 PERSONAL SAFETY EQUIPMENTS

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Mask and goggles: A respiratory protecon mask and protecve goggles must be used during cleaning operaon.
4.3 SAFETY SYMBOLS
The unit includes the following safety signs which must be followed by personnel:
General hazards.
Electric shock hazard.
Presence of moving organs.
Presence of surfaces that may cause injures.

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4.4 REFRIGERANT SAFETY DATA SHEET
Name: R134a (100% ,1,1,2-Tetra uoroethane).
HAZARDS INDICATIONS
Main hazards: Asphyxia.
Speci c hazards: The rapid evapora on may cause freezing.
It can cause cardiac arrhythmia.
FIRST AID MEASURES
General informa on: Do not give anithing to an unconscious person.
Inhala on:
Trasport in the open air.
Use oxygen or ar  cial respira on if necessary.
Do not administer adrenaline or similar substances.
Eye contact: Rinse carefully with plenty of water for at least 15 minutes and consult a doctor.
Contact with skin: Wash immediately with plenty of water.
Immediately remove contaminated clothing.
FIRE PREVENTION
Ex nguishing media: Whatever.
Speci c hazards: Increased pressure.
Speci c methods: Use water spray to cool containers.
Special protec ve equipments: Use breathing apparatus in con ned spaces.
ACCIDENTAL RELEASE MEASURES
Personal precau ons:
Evacuate personnel to safety areas.
Ven late appropriately.
Use personal protec ve equipment.
Environmental precau ons: Evaporate.
Cleaning methods: Evaporate.
HANDLING AND STORAGE
Handling measures/technical pre-
cau ons: Ensure su cient air exchange and/or suc on in workplaces.
Advice for safe use:
Do not breath in vapores or aerosol.
Do not pressure test with air/HFC-134a mixtures. Can form a combus ble mixture with air at pressures above atmo-
spheric pressure when the volume ra o exceeds 60%.
Storage: Close carefully and store in a cool, dry and well ven lated area.
Keep in original containers. Incompa ble products: explosive,  ammable materials, organic peroxide.
EXPOSURE CONTROLS/PERSONAL PROTECTION
Control parameters: AEL (8-h and 12-h TWA) = 1000 ml/m3.
Respiratory protec on: Use self-contained breathing apparatus for rescue and maintenance work in tanks.
Vapours are heavier than air and can cause choking by reducing the oxygen available for breathing.
Eye protec on: Full protec ve goggles.
Hand protec on: Rubber gloves.
Hygienic measures: No smoking.
PHYSICAL AND CHEMICAL PROPERTIES
Appearance: Colourless lique ed gas.
Odour: Similar to ether.
Boiling point: -26.5°C at atmospheric pressure.
Ligh ng point: Does not ignite.
Density: 1.21 kg/l at 25°C.
Solubility in water (wt %):0.15.
STABILITY AND REACTIVITY
Stability: No reac vity when used with appropriate instruc ons.
Materials to avoid: Alkali metals, alkaline earth metals, powdered metals, granulated metal salts.
Dangerous decomposi on products: Halogen acids, carbon dioxide (CO2), carbon monoxide,  uorocarbons, carbonyl halides.
Dangerous reac ons:
The product is not  ammable in contact with air under ambient condi ons of temperature and pressure. Under pres-
sure with air or oxygen, the mixture may become  ammable. Some mixtures of HCFC or HFC and chlorine may become
 ammable or reac ve under certain condi ons.
TOXICOLOGICAL INFORMATION
Acute toxicity: LD/LC50/inhala on/4 hours/on rat = 1107000 mg/m3.
Local e ects: Concentra ons substan ally above the TLV (1000 ppm) may cause narco c e ects.
Inhala on of decomposed products at high concentra ons may cause respiratory failure (pulmonary edema).
Long term toxicity: Has not shown carcinogenic, teratogenic or mutagenic e ects in animal experiments. May cause cardiac arrhythmia.
Threshold limit for cardiac sensi vity: 312975 mg/m3. Threshold limit for anaesthe c e ects: 834600 mg/m3.
ECOLOGICAL INFORMATION
Global warming poten al
GWP (R744=1): 1430
Poten al deple on Ozone ODP
(R11=1): 0
Disposal considera ons: Usable with recondi oning.

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5. GENERAL CHARACTERISTICS
-
5.1 FLEXIBILITY AND BENEFITS OF GREEN INSTALLATION
Waste energy recovery: the unit can be installed near the kitchen, in the boiler room or the garage, basically in every room which has a large
Pleion si riserva il diritto di apportare modifiche di natura tecnica, estetica e commerciale senza alcun obbligo di preavviso.
GREEN
Air inlet
Air outlet
CALIDO
Air inlet
Air outlet
the unit can be placed in the laundry room. When producing hot water, it lowers the ambient temperature
Pleion si riserva il diritto di apportare modifiche di nat ura tecnica, estetic aecommerciale senza alcun obbligo di preavviso.
CALIDO
Air inlet
Air outlet
GREEN
Air inlet
Air outlet
Storage room cooling: the unit can be placed in the storage room as the low temperature helps to keep the food fresh.
: the unit can be located in the garage, gym, basement etc. when producing hot water, it cools the room and
supplied fresh air.
: The unit can work with a second heat source as solar panels, external heat pumps, boilers or other
6Pleion si riserva il diritto di apportar e modifiche di natura tecnica, estetic ae commerci ale senza alcun obbligodi pr eavviso.
Water supply
To sanitary users
Calido
Domestic Hot Water
Calido-S / Calido-D
Integration with solar thermal
GREEN
Calido-D
Integration boiler or
biomass system
Air inlet
Air outlet
-
tems. By making use of the renewable source in the air, it consumes much less energy.
5.2 COMPACT DESIGN
5.3 AVAILABLE MODELS
GREEN 220 - 220 S - 220 2S:
GREEN

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• GREEN 200 S:
• GREEN 200 2 S:
5.4 AVAILABLE ACCESSORIES
• ONE-FL
• ONE-SAS: temperature probe with 5 m cable.
GREEN S and GREEN 2S
6. TECHNICAL CHARACTERISTICS
•
•
•
•
•
•
•
• Safety devices for high and low gas pressure.
•
even in extreme cold winters.
•
•
•
7. ITEMS CONTAINED INSIDE THE PACKAGING
Unit packaging
Item Image
1
User-intaller manual 1

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8. OVERVIEW OF THE UNIT
8.1 PARTS AND DESCRIPTIONS
8.2 DIMENSIONS
GREEN 200 GREEN 200 S GREEN 200 2S
I
A
B
C
F
E
D
H
G
L
O
N
M
Q
P

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Dimensions [mm] GREEN 220 GREEN 220 S GREEN 220 2S
A 1638 1638 1638
B 1124 1124 1124
C 1062 1062 1062
D 262
E 747 747 747
F 932 932 932
G 30
H φ 160
I 706
Lφ 655
M - 258 258
N - - -
O - 692 692
P - 787
Q - 927
AIR CONNECTION QUOTAS
318
80
148 170
GREEN 220 GREEN 220 S GREEN 220 2S
POS. DESCRIPTIONS DIMENSIONS
GREEN 220 SERIES
1 Aluminium heat exchanger 3/8”
2 Hole for auxiliary cables φ 17 mm

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POS. DESCRIPTIONS DIMENSIONS
GREEN 220 SERIES
3 Hole for power supply φ 17 mm
4 Condensate drain φ 22 mm x 0,3 m
5Hot water outlet G 1” female
61” ¼ female
7Upper tank temperature (T3) + thermostat
T85°C φ 12 mm x L 120 mm
8G ½” female
91200 W auxiliary electric heater with integrat-
ed thermostat 1” ¼ female
10 Grounding M6
11 Lower tank temperature (T2) φ 12 mm x L 90 mm
12 Cold water inlet G 1” female
13 Solar water outlet G 1” female
14 Auxiliary tank temperature /
15 Solar water inlet G 1” female
16 Solar exchanger coil 1,2 m2
17 Auxiliary heat source outlet G 1” female
18 Auxiliary heat source inlet G 1” female
19 Auxiliary heat source coil 0,5 m2
8.3 CABLE GLANDS
8.4 HOW TO REPLACE THE MAGNESIUM ANODE
order to protect it, and the other components. It can help to extend the life-span of the tank.
Check the magnesium anode every 6 months and change it if it has the diameter less than 22 mm, clean it if it is intact but
encrusted by limestone.
• Turn the power of the unit 'OFF' and pull out the plug.
• Drain all the water out of the tank.
• Remove the old magnesium anode from the tank.
• Replace it with the new magnesium anode.
• Recharge the water.

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8.5 REGULATION THERMOSTAT OF THE ELECTRIC HEATING
The auxiliary electric heater is equipped with a thermostat for regulaon; the access to this component takes place by removing the plasc
frontal cover. Such control allows a variaon of temperature between 15 and 75°C; each notch corresponds to a temperature variaon of 10°C.
The factory seng is set to its maximum value, 75°C, a modicaon of this value is not recommended as it would produce malfuncons on the
legionella cycle control (For this purpose it is required to read carefully the paragraph 11.4.5.
8.6 HYDRAULIC AND GAS CIRCUIT DIAGRAM

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8.7 GAS CIRCUIT DIAGRAM
9. INSTALLATION
WARNING: All the operaons described below must be carried out only by QUALIFIED PERSONNEL. Before any operaon on
the unit, make sure that the power supply is disconnected.
9.1 GENERALITY
When installing or servicing the cooling circuit, it is necessary to strictly follow the rules listed in this manual, to conform to all the specicaons
of the labels on the unit, and to take any possible precauons. Failure to follow these rules can lead to dangerous situaons.
Aer receiving the unit, immediately check its integrity. The unit le the factory in perfect condion; any eventual damage
has to be quesoned to the carrier and recorded on the Delivery Note before signing it.
The company has to be informed, within 8 days, of the extent of the damage. The Customer should prepare a wrien statement of any severe
damage.
Please note that all the installaon diagrams shown in this chapter are only a guide. The correct installaon plant must be
evaluated case by case by the installer.
9.2 SAFETY INSTRUCTIONS
To prevent injury to the user, other people, or property damage, the following instrucons must be followed. Incorrect operaon due to ignoring
of instrucons may cause damages or injuries.
Install the unit only when it complies with local regulaons, laws and standards. Check the main voltage and frequency. This unit is only suitable
for earthed sockets, connecon voltage 220 - 240 V ~ / 50Hz. The following safety precauons should always be taken into account:
• be sure to read the following warning before installing the unit;
• be sure to observe the cauons specied here as they include important items related to safety;
• aer reading these instrucons, be sure to keep it in a handy place for future reference.

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9.2.1 Warning
The unit must be securely xed to avoid noise and vibraons: when insuciently secured, the unit could fall causing injury.
The supporng surface must be at to support the weight of the unit and suitable for installing the unit without increasing
noise or vibraon.
When installing the unit in a small room, please take measures (like sucient venlaon) to prevent the asphyxia caused by
the leakage of refrigerant.
Be sure to use the provided or specied parts for the installaon work: the use of defecve parts could cause an injury due to
possible re, electric shocks, the unit falling etc.
Do not tear o the labels on the unit: the labels are for the purpose of warning or reminding, keeping them can ensure your
safe operaons.
Indoor installaon is mandatory: it is not permied to install the appliance in an open place or in a place easily accessible by
rain and in general accessible from any source of water.
The installaon place without direct sunlight and other heat supplies is recommended: if no way to avoid these, please install
a covering.
Make sure that there’s no obstacles around the unit.
9.2.2 Cauon
Do not install the unit in a place where there is a possibility of ammable gas leaks: if there is a gas leak and gas accumulates
in the area surrounding the unit, it could cause an explosion.
Do not clean the unit when the power is 'ON': the power supply must always be ‘OFF’ when cleaning or servicing the unit.
Failure to do so may result in injury due to high fan speed or electrical shock.
Do not install the unit in a place where there is a possibility of ammable gas leaks: if there is a gas leak and gas accumulates
in the area surrounding the unit, it could cause an explosion.
Do not clean the unit when the power is 'ON': the power supply must always be ‘OFF’ when cleaning or servicing the unit.
Failure to do so may result in injury due to high fan speed or electrical shock.
In case the unit is used without an exhaust air duct, check that the installaon room has a volume of not less than 20m3,
with adequate venlaon. Please note that the temperature of the expelled air is 5÷10°C lower than the inlet air, therefore if
not channelled it can cause a signicant drop of the temperature of the installaon room.
Do not connue to run the unit when there is something wrong or there is a strange smell: the power supply must be cut o
immediately to stop the unit, otherwise malfuncon may cause an electric shock or re.
Inside the unit, there are some moving parts. Be especially careful when working near them, even if the unit is o.
Do not insert ngers or other materials into the fan and evaporator.
The temperatures of heads and exhaust piping of the compressor are usually high. Therefore be careful when working near
condensing coils.
The aluminium ns are very sharp and cause seriuos injuries.
9.3 HANDLING OF THE UNIT
As a general rule, the unit must be stored and/or transported in its container in upright posion and without water in the tank. During the trans-
port (if done with care) and the storage, it is recommended to not exceed an inclinaon angle of 30 degrees max. Ambient storage temperatures
of -20 to +70 degrees Celsius are permissible.
9.3.1 Handling of the unit with forkli
When using the forkli for handling, the unit must remain mounted on the pallet. The liing rate should be reduced to a minimum. Due to the
height weight of its upper part , the unit must be secured against pping over. To avoid damages, the unit must be placed on a at surface.
9.3.2 Manual handling of the unit
For the manual handling, a wooden pallet can be used; ropes or straps can be used for transport, taking care not to p the unit. The maximum
permissible lt angle is 45 degrees, although it is always advisable to keep the unit upright.

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If transport at an angle of inclinaon cannot be avoided (at a maximum angle of 45° and for a limited period of me), the unit should be operated
one hour aer it has been moved to its nal upright posion.
ATTENTION: Due to the high centre of gravity, and the relavely low overturning moment, the unit must be secured against
pping over.
ATTENTION: the cover of the unit cannot withstand stress, so it cannot be used for the transport.
ATTENTION: The unit can be inclined only on the opposite side of the handle (see above drawing), namely only on the le-
hand side of the control panel.
The unit is equipped with a handle to make easy the transport. The handle is supplied separately: If necessary, it must be aached with two M8
screws to the two threaded inserts provided.
M8 Inserts Handle
9.4 REQUIRED SERVICE SPACE
Below you will nd the minimum space required to ensure service and maintenance acvies on the units.
In addion, recirculaon of the exhaust air must be avoided; failure to do so would result in a drop in performance or the acvaon of safety
controls. For these reasons, the following distances must be observed.

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min 1,2 m min 0,5 m
min 0,45 m
min 0,5 m
min 0,3 m
If the air intake and/or air outlet ducts are connected, part of the air ow on the capacity of the heat pump will be lost.
If the unit connects with air ducts it should be: DN 160 mm for rigid pipes or internal diameter 160 mm for exible pipes.
Total length of the ducts should not be longer than 4 m or the maximum stac pressure should not exceed than 60 Pa. If the
air ducted are bended, the pressure loss will be larger. So if there are two bending pipes, the total lenght of the ducts should
not be longer than 2 m.
Please note that the performance of the unit are reduced in the case the air inlet is connected to a duct which takes air from
outside, because of the low winter temperatures and high summer temperatures.
The opmal working ambient temperature is 20°C.
In the table on this side, the maximum total lengths to be observed for
the air duct depending on the geometry (original 160mm) and if the
diameter is to be extended to 180 mm.
Max lenght of air
piping (in+out) d= 180 mm d=160 mm
Without curves 8 m 4,3 m
90°
curves no.
16,9 m 3,2 m
25,9 m 2,2 m
34,9 m /
4 4 m /
9.5 INSTALLATION SCHEME

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An hydraulic safety group complying with EN 1487 standards must be installed in the water inlet. If not, it could cause dam-
age to the unit, or even hurt people. The safety group must be provided with stop valve, manual drain valve, inspeconable
non-return valve and safety valve set to 7 bar. Refer to the installaon diagram to nd out where to install the safety group.
The safety group must be protected against frost.
The discharge pipe of the safety group must be installed with a connuous downward inclinaon and in an environment
protected from frost. The water must be free to drip from the safety group discharge pipe and the end of this pipe must be
le open to atmospheric pressure.
The safety group must be inspected regularly to remove lime deposits and to ensure that it is not blocked. Beware of burns,
due to the high temperature of the water.
The expansion tank with capacity suitably sized to absorb volume variaons (depending from the extension of sanitary
distribuon piping) must be installed in the inlet line. In each case, its capacity must not be lower than 12 liters for 200 series
and 18 liters for 300 series.
The tank water can be drained through the external manual gate valve installed on the inlet pipe (not provided).
Aer all the pipes installed, open the cold water inlet and the hot water outlet to ll the tank. When there is water normally
owing out from water outlet taps, the tank is full. Turn o all valves and check all pipes. If any leakage, please repair.
If the inlet water pressure is less than 1.5 bar, a pressure pump should be installed at the water inlet. For ensure the long
safety using age of tank at the condion of water supply hydraulic higher than 5.5 bar, a reducing valve should be mounted
at the water inlet pipe.
A lter is advisable in the air inlet. If the unit is connected with ducts, lter in there must be put forward to the air inlet of
duct.
For draining the evaporator condensate water, install the unit on a horizontal plane with a maximum angle of inclinaon of
2 degrees towards the drain hole on the opposite side of the control panel. If this is not the case, make sure that the conden-
sate drainage pipe is located at the lowest point and siphon it if necessary.
9.6 HYDRAULIC CONNECTIONS
Hydraulic connecons must be made in accordance with naonal and local regulaons. The pipes can be made of mullayer pipe, polyethylene
or stainless steel and must withstand at least 100°C and 10 bar. The pipes must be carefully sized according to the desired water ow rate and
the pressure drop of the hydraulic circuit. All hydraulic connecons must be insulated using closed-cell material of adequate thickness. The units
should be connected to the piping using exible couplings. It is recommended to install the following components in the hydraulic circuit:
• Y-shaped metallic lter (to be mounted on the inlet pipe) with a mesh not larger than 1mm.
• Automac charging group (3 bar advised) when water supply pressure is higher than 5,5 bar.
• Hydraulic safety group (7 bar).
• Manual gate valves to separate the unit from the hydraulic circuit.
• Manual gate valve on the inlet pipe to discharge the unit if necessary.
• Thermometers for wells to monitor the system’s temperature.
• Expansion tanks, safety valves and air vents where indicated in the following installaon diagrams.
Perform the connecons making sure that weight of the pipes do not overload the unit.
Check the water hardness, which should not be below 12°f. With parcularly hard water, it’s recommended the use of a
water soener so that the residual hardness is no more than 20°f and no less than 15°f.
WARNING: When is possible, connect the pipes to the hydraulic connecons always using the system key against key.
WARNING: Unit water inlet pipe have to be in correspondence with the blue connecon, otherwise the unit malfuncon
could occur.
WARNING: It is compulsory to install on the WATER INLET connecon a metallic lter with a mesh not larger than 1 mm.
Should the lter not be installed, the warranty will no longer be valid. The lter have to be kept clean, so make sure that it is
clean aer the unit has been installed, and then check it periodically.
WARNING: if an external pump is installed and connected to the system (for recirculaon of domesc hot water or solar
water) It is recommended to also install and connect a ow switch before the pump. Otherwise, any damage to the pump
will not be reported and system malfuncon could occur.
Perform the drainage/piping work according to the installaon instrucon. If there is a defect in the drainage/piping work,
water could leak from the unit and household goods could get wet and be damaged.
Hot water needs to be mixed with cold water before it is distribuited to users, to hot water (over 50°C) in the unit can cause
injury. The use of an-burn valves is recommended.
The diagrams are to be considered only for indicaon purpose. It is always required the study of the specic installaon
context and the approval of the system by a qualied heang engineer designer.
9.6.1 Water connecons
Please pay aenon to the following points when connecng the water circuit pipes:
1. Try to reduce pressure losses in the water circuit.
2. Check that there are no impuries in the pipes and that they are smooth inside, check them carefully for leaks, and then t them with

CALIDO1 DHW heat pump with tank
20
insulaon.
3. Install the hydraulic safety group in the water inlet.
4. Install also an exspanion tank suitable sized to absorbe volume variaons.
5. The nominal diameter of the pipe must be chosen on the basis of the available water pressure and the expected pressure drop within the
pipe system.
6. Water pipes can be exible. To avoid corrosion damage, ensure that the materials used in the pipe system are compable.
7. During the installaon of the pipes in situ, any contaminaon of the pipe system must be avoided.
9.6.2 Water loading
If the unit is used for the rst me or used again aer emptying the tank, please make sure that the tank is full of water before turning on the
power.
• Flush the sysem carefully.
• Open the cold water inlet and hot water outlet.
• Start the water loading. When water ows out of the hot water outlet normally, the tank is full.
• Close the hot water outlet valve: the water load is nished.
ATTENTION: Operaon without water in water tank, may cause damages the auxiliary electric heater.
9.6.3 Water draining
If the unit needs cleaning, moving etc, the tank should be emped.
• Close the cold water inlet.
• Open the hot water outlet and open the manual valve of the drainage pipe.
• Start the water emptying.
• Aer emptying, close the manual valve.
9.6.4 Installaon of an external recirculaon pump and ow switch
If necessary to recirculate solar water or hot sanitary water, an external pump and ow switch must be connected and installed hydraulically
and electrically. The max available output for the pump is 5 A resisve. Also the oponal probe T6 must be connected to the electrical box and
correctly posioned on the hydraulic plant (see the diagrams here below). The Parameter no. 14 must be congured by the installer (1= hot
sanitary water circulaon, 2= solar water circulaon).
The circulaon of hot sanitary water is useful to avoid water becomes cold in the sanitary circuit if not used for several me. In this way the hot
water will be always ready when requested.
The circulaon of solar water is possible only if solar panel are installed and only for CALIDO1-S or CALIDO1-D units. In this way solar energy is
used as secondary heat source to save energy.
In case of solar integraon water, the following is required on the relevant circuit:
• an expansion tank suitable sized to absorbe volume variaons, installed before the solar system.
• a pressure safety valve (3 bar) installed aer the solar panel.
• an air vent valve with manual gate installed near the safety valve.
The outlet of the safety valve must be directed to a special tank for collecng glycol water, and not to normal waste water.
In case of recirculaon of solar integraon water, a thermal discharge safety valve (85°C) is highly recommended on the hot water outlet, with
the probe posioned in a ½" thermowell installed in the recirculaon water connecon.
The CALIDO1 300 litres is equipped with an auxiliary well for the use of a possible external temperature probe for solar management with a sep-
arate controller. In this case, it is advisable to pass the temperature probe through the auxiliary well (see Secon 8.3) and through the channel
provided behind the front plasc cover, which is connected to the auxiliary well. In this way the cable, entering from the rear of the unit, will not
be visible, thus preserving the machine's appearance. To remove the front plasc cover, simply unscrew the two lower xing screws and remove
the cover from the upper cover. To remove the upper cover, it is necessary to unscrew the three screws xing the cover to the tank (one at the
rear and two at the sides).