Unical HP-OWER ONE R Series Use and care manual

User’s and Installer’s ManUal
70R – 90R – 120R - 120RK – 140R – 160RT – 180R
70RK – 90RK – 120RK – 140RK – 160RTK – 180RK
ONE R

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CONTENTS
1PURPOSE AND CONTENTS OF THE MANUAL.............................................................................................................. 4
1.1 HOW TO KEEP THE MANUAL .......................................................................................................................................... 4
1.2 GRAPHIC SYMBOLS USED IN THE MANUAL ............................................................................................................... 4
2NORMATIVE REFERENCES............................................................................................................................................... 4
3PERMITTED USE................................................................................................................................................................... 5
4GENERAL SAFETY GUIDELINES ..................................................................................................................................... 5
4.1 WORKERS’ HEALTH AND SAFETY................................................................................................................................. 5
4.2 PERSONAL PROTECTIVE EQUIPMENT.......................................................................................................................... 6
4.3 SAFETY SIGNS.................................................................................................................................................................... 6
4.4 REFRIGERANT SAFETY DATA SHEET........................................................................................................................... 7
4.5 SPECIFIC R32 GAS WARNINGS........................................................................................................................................ 8
4.6 R32 GAS CHARGE............................................................................................................................................................... 8
4.7 R32 GAS DISPOSAL............................................................................................................................................................ 8
4.8 SAFETY RULES FOR R32 GAS TRANSPORT AND STORAGE...................................................................................... 8
5AVERAGE VERSIONS .......................................................................................................................................................... 9
6INSTALLATION..................................................................................................................................................................... 9
6.1 GENERAL............................................................................................................................................................................. 9
6.2 TEMPERATURE LIMITS DURING TRANSPORT AND STORAGE.............................................................................. 10
6.3 LIFTING AND HANDLING............................................................................................................................................... 10
6.4 POSITIONING AND MINIMUM TECHNICAL CLEARANCES..................................................................................... 10
6.5 PLUMBING CONNECTIONS............................................................................................................................................ 13
6.5.1 Features of the circuit water ........................................................................................................................................ 14
6.5.2 Condensation discharge system ................................................................................................................................... 14
6.5.3 Filling the system ......................................................................................................................................................... 15
6.5.4 Service sleeves.............................................................................................................................................................. 15
6.5.5 Air venting valve........................................................................................................................................................... 15
6.5.6 System unloading.......................................................................................................................................................... 16
6.5.7 HYDRAULIC CIRCUIT ............................................................................................................................................... 17
6.6 REFRIGERANT DIAGRAM HP_OWER ONE 70R –70RK -90R –90RK....................................................................... 18
6.7 REFRIGERANT DIAGRAM HP_OWER ONE 120R –120RK -120RT ........................................................................... 19
6.8 REFRIGERANT DIAGRAM HP_OWER ONE 140R -140RK -160RT –160RTK -180R -180RK................................. 19
6.9 ELECTRICAL CONNECTIONS........................................................................................................................................ 20
6.9.1 Access to the electric panel .......................................................................................................................................... 20
6.9.2 Power supply................................................................................................................................................................ 21
6.9.3 Connection terminal block ........................................................................................................................................... 21
7STARTUP............................................................................................................................................................................... 23
7.1 SWITCHING ON THE UNIT.............................................................................................................................................. 24
8INSTRUCTIONS FOR THE USER..................................................................................................................................... 24
9SHUTDOWNS FOR LONG PERIODS............................................................................................................................... 24
10 MAINTENANCE AND PERIODIC CHECKS................................................................................................................... 25
10.1 CLEANING THE FINNED COIL....................................................................................................................................... 26
10.1.1 Cleaning the finned coils treated with the anti-corrosion method ............................................................................... 26
10.2 CLEANING OF THE EXTERNAL SURFACES................................................................................................................ 26
10.3 EXTRAORDINARY MAINTENANCE............................................................................................................................. 26
10.4 ENVIRONMENTAL PROTECTION ................................................................................................................................. 27
11 DECOMMISSIONING.......................................................................................................................................................... 27
11.1 RESIDUAL RISKS ................................................................................................................................................................... 28
12 TECHNICAL DATA............................................................................................................................................................. 34
12.1 TECHNICAL SHEET.......................................................................................................................................................... 34
12.2 UNIT AND AUXILIARY ELECTRICAL DATA............................................................................................................... 36
12.3CORRECTIVE FACTORS.................................................................................................................................................. 37
13 PRODUCT FICHE EU REGULATION 811/2013.............................................................................................................. 38
14 HYDRAULIC CIRCUIT AVAILABLE HEAD PRESSURE............................................................................................ 52

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15 OPERATING LIMITS.......................................................................................................................................................... 54
15.1 EVAPORATOR WATER FLOW RATE ............................................................................................................................ 54
15.2 COLD WATER PRODUCTION (SUMMER MODE)........................................................................................................ 55
15.3 HOT WATER PRODUCTION (WINTER MODE) ............................................................................................................ 55
15.4 AMBIENT AIR TEMPERATURE AND SUMMARISED TABLE.................................................................................... 55
16 CORRECTION FACTORS FOR USE OF GLYCOL ....................................................................................................... 57
17 DIMENSIONS........................................................................................................................................................................ 58
17.1.1 Model HP_OWER ONE 70R - 70RK - 90R - 90RK...................................................................................................... 58
17.1.2 Model HP_OWER ONE 120R - 120RK - 120RT.......................................................................................................... 59
17.1.3 Model HP_OWER ONE 140R - 140RK - 160RT - 160RTK - 180R - 180RK............................................................... 59
17.2 ACCESSING THE INNER PARTS..................................................................................................................................... 60
17.2.1 Mod. HP_OWER ONE 70R - 70RK - 90R - 90RK ....................................................................................................... 60
17.2.2 Mod. HP_OWER ONE 120R - 120RK - 120RT............................................................................................................ 61
17.2.3 Mod. HP_OWER ONE 140R - 140RK - 160RT - 160RTK - 180R - 180RK................................................................. 61

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The manual of HP_OWER ONE units contains all the necessary information for optimal use of the equipment under safe conditions
for the operator.
1PURPOSE AND CONTENTS OF THE MANUAL
This manual provides basic information as to the selection, installation, operation and maintenance of heat pumps. It is intended
for the operators of the appliance and it enables them to use the equipment efficiently, even if they do not have any previous
specific knowledge.
CAUTION: Although this manual has been drafted for the end user, some of the operations described are the
responsibility of skilled personnel having technical or professional qualifications to perform the activities herein. They
must also be kept up-to-date by attending refresher courses acknowledged by the competent authorities. These tasks
include: installation, routine and extraordinary ma
intenance, decommissioning of the appliance and any other
operation indicated “by qualified personnel”.
When the installation and/or maintenance operations are over, the qualified operator must correctly inform the end
user regarding use of the appliance and the necessary periodical inspections.
The operator has the responsibility of submitting all of the documentation necessary (including this manual) and of
explaining that it all must be kept with care, in the vicinity of the appliance and always available.
The manual describes the machine at the moment it was sold. It must therefore be considered adequate with respect to the state-
of-the-art in terms of potentiality, ergonomics, safety and functionality.
The company also performs technological upgrades and does not consider itself obliged to update the manuals of previous
machine versions which could even be incompatible. Therefore make sure to use the supplied manual for the installed unit.
The user is recommended to follow the instructions contained in this booklet, especially those concerning safety and routine
maintenance.
1.1 HOW TO KEEP THE MANUAL
The manual has to always be kept together with the unit it refers to. It has to be stored in a safe place, away from dust and
moisture. It must be accessible to all users who shall consult it any time they are in doubt on how to operate the equipment.
The company reserves the right to modify its products and related manuals without necessarily updating previous versions of the
reference material. We also decline any responsibility for possible inaccuracies in the manual if due to printing or transcription
errors.
The customer shall store any updated copy of the manual or parts of it delivered by the manufacturer as an attachment to this
manual.
The company is available to give any detailed information about this manual and to give information regarding the use and the
maintenance of its own units.
1.2 GRAPHIC SYMBOLS USED IN THE MANUAL
Indicates operations that can be dangerous for people and/or disrupt the correct operation of the unit
Indicates prohibited operations.
Indicates important information that the operator has to follow in order to guarantee the correct operation of the
unit in complete safety.
2NORMATIVE REFERENCES
HP_OWER ONE units have been designed in compliance with the following directives and harmonized standards on the safety of
machinery:
• EC directives, 2014/35/UE, 2014/30/UE, 2011/65/UE, 2012/19/UE, 2014/68/UE
• Standard UNI EN 12735-1
• Standards IEC EN 60335-1, IEC EN 60335-2-40
• Standards IEC EN 55014-1, IEC EN 55014-2
• EN 50581
• EN 14276
And the following directives, regulations and standards on ecodesign and energy labelling:
• Community directive 2009/125/EU and subsequent transposal
• Community directive 2010/30/EU and subsequent transposal
• EU Regulation n.811/2013
• EU Regulation n.813/2013
• EN 14511-1:2018. EN 14511-2:2018. EN 14511-3:2018. EN 14511-4:2018
• EN 14825:2018

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3PERMITTED USE
• The company excludes any contractual and extra contractual liability for damage caused to persons, animals or objects, by
incorrect installation, setting and maintenance, improper use of the equipment, and the partial or superficial reading of the
information contained in this manual.
• These units are built for the heating and/or cooling of water. Any other use not expressly authorised by the manufacturer is
considered improper and therefore not allowed. The fluid to be used is exclusively water or a mixture of water and glycol in
case of low water temperatures
• The installation place and the water and electric circuit must be established by the plant designer and must take into account
both technical requirements as well as any applicable local laws and specific authorisations.
• All the work must be executed by skilled and qualified personnel, competent on the existing regulations in country of
installation.
• This appliance is intended to be used by expert or trained operators in shops, light industry and in factories, or for commercial
use by non-expert personnel.
• The appliance may be used by children at least 8 years old and by persons with reduced physical, sensory or mental
capabilities or without experience or the necessary knowledge as long as they are supervised or after they themselves have
received instructions on the safe use of the appliance and understand the relevant dangers. Children must not play with the
appliance. The cleaning and maintenance which the user is expected to carry out on the unit cannot be done by children
without supervision.
• The use of the device by people with electrically controlled medical devices, such as pacemakers, is prohibited, as harmful
interference can be created
• Direct interaction with the device by persons with electrically controlled medical devices, such as pacemakers, is prohibited as
harmful interference may be created. It is recommended to maintain an adequate distance from the installation site of the
unit, as indicated by the medical system used.
Wearers of electrically controlled medical devices should exercise caution when interacting with the unit.
Wearers of metal prostheses should exercise caution when interacting with the unit.
4GENERAL SAFETY GUIDELINES
Before starting any type of operation on the HP_OWER ONE units, every operator must be perfectly familiar with the operation of
the machine and its controls and must have read and understood all the information in this manual.
It is strictly forbidden to remove and/or to tamper with any safety device.
Children or unassisted disabled persons are not allowed to use the appliance.
Do not touch the appliance when barefoot or parts of the body are wet or damp.
It is forbidden to perform any cleaning operation when the master switch is ‘ON’.
It is forbidden to pull, detach or twist the appliance’s electric cables, even if unplugged.
Do not step on, sit down on and/or place any type of object on the appliance.
Do not spray or pour water directly on the unit.
Do not dispose of, abandon or leave within reach of children packaging materials (cardboard, staples, plastic
bags, etc.) as they may represent a hazard.
Any routine or extraordinary maintenance operation must be carried out with the machine stopped and
disconnected.
Do not place your hands or introduce screwdrivers, spanners or any other tools on moving parts.
The machine operator and maintenance personnel must receive suitable training for the performance of their
tasks in safety.
Operators must know how to use personal protective equipment and the accident-prevention rules of national
and international laws and regulations.
4.1 WORKERS’ HEALTH AND SAFETY
The European Union has issued some directives regarding the safety and health of workers, including: 89/391/EEC, 89/686/EEC,
2009/104/EC, 86/188/EEC and 77/576/EEC and subsequent amendments which every employer is obliged to follow and have
followed. We observe therefore that:
Do not tamper with or replace parts of the unit without the specific consent of the manufacturer. The manufacturer
shall have no responsibility whatsoever in case of unauthorised operations.
Using components, consumables 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 unit.
The operator’s workplace has to be kept clean, tidy and clear of objects that may hinder free movement.
Appropriate lighting of the work place shall be provided so as to allow the operator to carry out the required
operations safely. Poor or excessive lighting can cause risks.
Ensure that work places are always adequately ventilated and that the extraction systems are working, in good
condition and in compliance with the requirements of the laws in force.

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During the design phase, the indications contained in UNI EN ISO 14738 regarding the workstations on the machine
were followed and the lifting limits imposed by UNI ISO 11228-1 were evaluated. Be sure to maintain a posture that
does not cause fatigue during installation and maintenance of the unit. Also check its weight before moving any
component.
The unit works with R32 refrigerant, which is included in the list of greenhouse gases (GWP 675) which are subject to the
requirements in EU regulation n. 517/2014 called “F-GAS” (mandatory in the European zone). Among the provisions of this
regulation, it sets forth that operators working on systems running with greenhouse gases be in possession of a certification,
issued or acknowledged by the competent authorities, attesting that they have passed a test authorising them to perform this
work. In particular
 Up to 3kg total refrigerant in the appliance: category 2 certification.
 3kg and more total refrigerant in the appliance: category 1 certification.
The gaseous form of R32 refrigerant is heavier than air and if released into the environment, most of it tends to concentrate in
poorly ventilated areas. Inhaling it can cause dizziness and sensations of suffocation, and, if in contact with open flames or hot
objects, it can develop lethal gases (see the refrigerant’s safety data sheet in paragraph 4.4)
Pay attention to the fact that refrigerant fluids can be odourless
For any operation on the heat pump system:
Wear the appropriate PPE (specifically gloves and goggles).
Make sure that the workplace is well ventilated. Do not work in closed environments o
r ditches with little air
circulation.
Do not operate on the refrigerant in the vicinity of hot parts or naked flames.
Do not release the refrigerant into the environment and pay special attention to accidental leakage from pipes
and/or fittings even after having emptied the plant.
Make sure there is a fire extinguisher near the unit
4.2 PERSONAL PROTECTIVE EQUIPMENT
When operating and servicing the HP_OWER ONE units, the following personal protective equipment must be used:
Clothing: Maintenance technicians and operators must wear protective clothing that complies with the basic safety
requirements currently in force. In case of slippery floors, they must also wear safety shoes with non-slip soles.
Gloves: During maintenance or cleaning operations, appropriate protective gloves must be used.
Wear safety shoes with non-slip soles, especially in environments with slippery floors
Mask and goggles: Respiratory protection (mask) and eye protection (goggles) should be used during
cleaning operations.
4.3 SAFETY SIGNS
The unit features the following safety signs, which must be complied with:
Generic hazard
Dangerous electric voltage
Moving parts
Surfaces which can cause injuries
Boiling surfaces which can cause burns
Fire hazard

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4.4 REFRIGERANT SAFETY DATA SHEET
Name:
R32.
HAZARDS IDENTIFICATION
Main hazards:
Asphyxiation.
Specific hazards:
Quick evaporation could cause it to freeze.
FIRST AID MEASURES
General information:
Do not administer to people who are unconscious.
Inhalation:
Immediately remove to fresh air.
Use oxygen or artificial respiration as required.
The use of adrenaline or similar drugs should be avoided.
Eye contact:
Carefully rinse with plenty of water for at least 15 minutes and get medical attention.
Skin contact:
Wash immediately with plenty of water for at least 15 minutes. Apply a sterile gauze.
Immediately remove contaminated clothing.
FIRE FIGHTING MEASURES
Extinguishing media:
Water spray, dry powder.
Specific hazards:
Breakage or explosion of vessel.
Specific methods:
Cool down the containers with a water spray from a safe position. Stop the product leakage if possible.
Use water spray, if possible, to abate the fumes. Move the vessels away from the area of the fire if this
can be done without posing any risks.
ACCIDENTAL RELEASE MEASURES
Personal precautions:
Try to stop the leak.
Evacuate personnel to safety areas.
Eliminate the ignition sources.
Ventilate appropriately.
Use personal protective equipment.
Environmental
precautions:
Try to stop the leak.
Cleaning methods:
Ventilate the area.
HANDLING AND STORAGE
Handling:
technical
measures/precautions:
Allow efficient air exchange and/or suction the work environments.
advice for safe use:
Do not breath in fumes or aerosol.
Storage:
Close carefully and store in a cool, dry and well ventilated area.
Keep in original containers. Incompatible products: explosive, flammable materials, organic peroxide
EXPOSURE CONTROLS/PERSONAL PROTECTION
Control parameters:
OEL – data not available.
DNEL: Derived no effect level (workers)
long-term – systemic effects, inhalation = 7035 mg/m3.
PNEC: Predicted no-effect concentration
water (fresh water) = 0.142 mg/l
aquatic, intermittent releases = 1.42 mg/l
sediment, fresh water = 0.534 mg/kg dry weight
Respiratory protection:
Not required.
Eye protection:
Safety goggles.
Hand protection:
Latex gloves.
Hygienic measures:
No smoking.
PHYSICAL AND CHEMICAL PROPERTIES
Colour:
Colourless.
Odour:
Ethereal. Hard to perceive at low concentrations.
Boiling point:
-51.7°C at atm. press.
Flash point:
648 °C.
Relative gas density (air =1)
Relative liquid density
(water =1)
1.8.
1.1.
Solubility in water:
280000 mg/l.

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STABILITY AND REACTIVITY
Stability:
Stable under normal conditions.
Materials to avoid:
Air, oxidizing agents, humidity.
Decomposition products
Under normal storage and use conditions, hazardous decomposition products should not be
generated.
hazardous:
TOXICOLOGICAL INFORMATION
Acute toxicity:
LD/LC50/inhalation/4 hours/on rat >1107000 mg/m3.
Local effects:
No known effect.
Long-term toxicity:
No known effect.
ENVIRONMENTAL INFORMATION
Global warming potential
675
GWP (R744=1):
Ozone Depletion Potential
ODP (R11=1):
0
Disposal considerations:
Refer to the supplier’s gas retrieval program. Avoid direct release into the atmosphere.
4.5 SPECIFIC R32 GAS WARNINGS
The R32 refrigerant gas:
- is odourless;
- is flammable, but only if there are naked flames;
- it may cause an explosion, but only if a given concentration in air is reached.
It is good practice to adhere to the following indictions:
- do not smoke near the unit;
- affix a no smoking sign near the unit;
- keep the premises where the unit is installed properly aerated;
- do not pierce or burn the unit;
- do not place the unit near ignition sources, such as naked flames, electric heaters etc.;
- every extraordinary maintenance or repair on the unit must be performed by skilled technicians or qualified personnel;
- a gas leak test must be performed after installation.
4.6 R32 GAS CHARGE
The procedures described below may only be performed by skilled technicians or qualified personnel:
- ensure the R32 is not contaminated by any other types of refrigerant;
- keep the gas cylinder in an upright position when charging;
- apply the appropriate label on the unit after charging;
- do not charge more refrigerant gas than needed;
- when charging is completed, perform leak tests before the operating test;
- once all the above operations have been completed, a second leak test should be performed.
4.7 R32 GAS DISPOSAL
The procedures described below may only be performed by skilled technicians or qualified personnel:
- do not dispose of the gas in areas at risk of explosive mixtures forming with air The gas should be disposed of in an
appropriate torch with backfiring stop device. Contact the supplier should you require operating instructions.
4.8 SAFETY RULES FOR R32 GAS TRANSPORT AND STORAGE
Before opening the unit’s packaging, ensure there are no gas leaks in the environment with an appropriate gas detector. Ensure
there are no fire ignition sources near the unit.
No smoking is allowed near the unit.
Transport and storage must be performed in accordance with the national regulations in force. Specifically, according to ADR
provisions, the total maximum quantity by transport unit in terms of net mass for flammable gases is 333 kg.

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5AVERAGE VERSIONS
Model
Description
HP_OWER ONE 70R
Size 7kW
HP_OWER ONE 70RK
Size 7kW + Antifreeze kit
HP_OWER ONE 90R
Size 9kW
HP_OWER ONE 90RK
Size 9kW + Antifreeze kit
HP_OWER ONE 120R
Size 12kW (Single-phase power supply)
HP_OWER ONE 120RK
Size 12kW + Antifreeze kit (Single-phase power supply)
HP_OWER ONE 120RT
Size 12kW (Three-phase power supply)
HP_OWER ONE 140R
Size 14kW
HP_OWER ONE 140RK
Size 14kW + Antifreeze kit
HP_OWER ONE 160RT
Size 16kW
HP_OWER ONE 160RTK
Size 16kW + Antifreeze kit
HP_OWER ONE 180R
Size 18kW
HP_OWER ONE 180RK
Size 18kW + Antifreeze kit
The -K version is equipped with a preassembled antifreeze kit for heat exchangers:
 Low absorption heating cables on the base of the air / refrigerant exchanger with automatic management and pre-wired
electrical connection
 Electric heaters in antifreeze PET applied to the plates of the water / refrigerant exchanger
6INSTALLATION
CAUTION: All the operation described below must be done by QUALIFIED PERSONNEL ONLY. Before any operation
on the unit, make sure that power is disconnected. Also make sure that power cannot be accidentally switched back
on until all the operations are over, by means of specific locks.
6.1 GENERAL
When installing or intervening on the chiller unit, it is necessary to strictly follow the rules listed in this manual, to observe all the
indications on the unit and however to take all possible precautions. Failure to comply with the rules reported on this manual can
create dangerous situations.
After receiving the unit, immediately check its integrity. The unit left the factory in perfect condition; any damage
must be immediately reported to the carrier and recorded on the Delivery Note before signing it.
The company must be informed, within 8 days, of the extent of the damage. The Customer should prepare a written statement of
any severe damage.
CAUTION: The units are designed for outdoor installation. In case of not working unit, the outside temperature must
never exceed 46°C. Beyond this value, the unit is no longer covered by the current regulations in the field of safety of
pressure equipment.
CAUTION: The installation place must be without any fire risks. Therefore all the necessary measures should be
adopted in order to prevent the risk of fire at the installation place. The appliance must not be placed near naked
flames and ignition sources or sources of heat. The masonry of the buildings adjacent to the unit must have an
adequate fire resistance class, in order to contain any fire that may develop inside the rooms. However, it is a good
idea to have a fire extinguisher available near the unit
CAUTION: The unit must be installed so as to allow free movement for repair and maintenance operations. The
warranty does not cover costs for platforms or other lifting equipment needed for any interventions.
All the maintenance operations and tests must be done by QUALIFIED PERSONNEL ONLY.
Before any operation on the unit, make sure that power is disconnected.
Do not use equipment to speed up the defrost process or for cleaning except for those recommended by the
manufacturer
The appliance must be placed in a room without ignition sources constantly running (for example naked flames, a
running gas-fired appliance or a running electric heater)

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Do not perforate or burn
CAUTION: There are some moving components inside the unit. Pay the utmost attention when operating in their
vicinity, even if power is disconnected.
The heads and delivery pipe of the compressor are normally quite hot.
Be careful when working near the condensing coils.
The aluminium fins are very sharp and can cause serious injuries.
After the maintenance operations, close the panels by fixing them with screws.
6.2 TEMPERATURE LIMITS DURING TRANSPORT AND STORAGE
Minimum storage temperature [° C]
-10°C
Maximum storage temperature [° C]
+50°C
6.3 LIFTING AND HANDLING
Handling must be carried out by qualified personnel, suitably equipped and with equipment suitable for the weight and
dimensions of the unit, in compliance with current accident prevention regulations. It is recommended:
1. Check the weight shown on the technical label affixed to the unit or in the technical data table;
2. Check that during the handling of the unit there are no rough paths, ramps, steps, doors that could destabilize the movement
and damage the unit;
3. Make sure the drive remains horizontal when moving;
4. Before moving the unit, check that the equipment is suitable for lifting and preserving the integrity of the unit;
5. Carry out the lifting operations using only one of the listed methods;
6. Before starting handling, make sure the unit is in stable equilibrium
The proposed lifting methods are as follows:
• forklift
• ropes / chains + sling bar
Be sure to bring the lifting ropes under tension gradually and
check their correct positioning.
6.4 POSITIONING AND MINIMUM TECHNICAL CLEARANCES
All models of the HP_OWER ONE range are designed and constructed for outdoor installations.
Coverings with canopies or positioning near plants or walls should be avoided to prevent air recirculation.
It is advisable to create an adequately sized support base for the unit. The units transmit a small amount of vibrations to the
ground: it is nonetheless advisable to apply vibration dampers between the base frame and support surface. It is very important to
avoid recirculation between intake and delivery air, so as not to downgrade performance of the unit or even to interrupt its
normal operation.
At least 5 m from the appliance there must be no shafts or manholes where gases might build up and generate an
explosive atmosphere.

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This is why the Minimum clearances shown below must be strictly guaranteed.
Do not obstruct or cover the vents on the top cover.
MODEL
A[mm]
B [mm]
C [mm]
D [mm]
E[mm]
L[mm]
HP_OWER ONE 70R/RK
1500
500
400
400
500
500
HP_OWER ONE 90R/RK
1500
500
400
400
500
500
HP_OWER ONE 120R/RK/RT
1500
500
400
400
500
500
HP_OWER ONE 140R/RK
1500
500
400
400
500
500
HP_OWER ONE 160RT/RTK
1500
500
400
400
500
500
HP_OWER ONE 180R/RK
1500
500
400
400
500
500

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In the case of suspended installation, it is necessary to ensure that the wall is made of solid brick, concrete or
materials with similar resistance characteristics. The bearing capacity of the wall must be sufficient to support at
least four times the weight of the unit.
The support surface must not be inclined to guarantee the correct functioning of the unit and to avoid the
possible overturning of the same. The installation surface of the unit must not be smooth, to avoid the deposit of
water / ice, potential sources of danger.
The installation location of the unit must be free of foliage, dust, etc. which could clog or cover the batteries.
Installation in areas subject to stagnation or water fall, for example from gutters, should be avoided. Also avoid
areas prone to snow accumulation (such as corners of buildings with pitched roofs). In case of installation in areas
subject to snow, mount the unit on a base raised 20-30 cm from the ground, in order to avoid snow accumulation
around the machine.
It is advisable to ensure sufficient air exchange to dilute the R32 gas in case of accidental leakage of the same, thus
avoiding the formation of explosive atmospheres. For this reason it is necessary to maintain a minimum distance of 1
meter from wells or wells, where gas could accumulate.
Avoid blocking or covering the ventilation openings on the top cover.
For installations in places with strong winds refer to the classification of the area according to the Beaufort scale. If
the value is ≥ 7 (strong wind, average wind speed = 13.9-17.1 m / s) it is strictly necessary to always keep the fan
powered, thus preventing involuntary rotation of the same.
In the event of side-by-side units, the minimum Lmin distance between
them is 1 m.
Covering with canopies or placing near plants or walls should be avoided to
prevent air recirculation.

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In the event of winds stronger than 2.2 m/s the use of wind barriers is
recommended.
It is always advisable to carry out an environmental impact assessment on the basis of the power and sound pressure data
reported in the "Technical data" chapter and of the sound emission limits based on the installation area of the unit, with reference
to DPCM 14 / 11/1997 . If the unit is installed near the personnel who perform their work, an assessment must be carried out
pursuant to Legislative Decree 81/2008 Art.189 et seq. To reduce vibrations and noise emissions, the use of rubber gaskets for wall
installation is recommended.
6.5 PLUMBING CONNECTIONS
The plumbing connections must be made in accordance with national and/or local regulations; pipes can be made of steel,
galvanised steel or PVC. Pipes must be accurately sized according to the nominal water flow rate of the unit and the pressure
drops of the water circuit. All pipes must be insulated with closed-cell material of adequate thickness. The chiller must be
connected to the pipes using new flexible joints, not reused ones. The water circuit should include the following components:
• Well thermometers to monitor the circuit’s temperature.
• Manual gate valves to isolate the chiller from the water circuit.
• Metal Y filter and dirt separator (installed on the return pipe) with metal mesh no larger than 1 mm.
• Loading group and exhaust valve where necessary.
• expansion vessel correctly sized
CAUTION: when sizing the pipes, make sure not to exceed the maximum pressure drop on plant side reported in the
technical data table in Paragraph 0 (see useful head).
CAUTION: connect the pipes to their fittings always using the key to key method.
CAUTION: make a suitable drain for the safety valve
CAUTION: It is the installer's responsibility to check that the expansion tank is adequate for the actual capacity of
the system
CAUTION: The return pipe from the system must be installed near the label “WATER INLET” otherwise the
evaporator could freeze.
CAUTION: It is mandatory to install a metal filter (with mesh no larger than 1 mm) and a dirt separator on the
return pipe from the system labelled “WATER INLET”. If the flow switch is manipulated or altered, or if the metal
filter and dirt separator are missing, the warranty will terminate immediately. The filter and dirt separator must be
kept clean. Therefore after installing the unit, you must make sure that they are still clea
n and check them
regularly.
All of the units leave the company supplied with flow switch (installed in factory). If the flow switch is altered or
removed or if the water filter and dirt separator are missing from the unit, the guarantee will be void. Refer to the
wiring diagram attached to the unit to connect the flow switch. Never jumper the connections of the flow switch in
the terminal board.
The heating system and the safety valves must comply with the requirements of standard EN 12828.

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6.5.1Features of the circuit water
To guarantee correct operation of the unit, the water must be appropriately filtered (see the instructions at the start of this
paragraph) and there must be only a minimum amount of dissolved substances. The maximum allowed values are shown below
MAXIMUM CHEMICAL-PHYSICAL PROPERTIES ALLOWED FOR THE CIRCUIT WATER
PH
7.5 - 9
Electrical conductivity
100 - 500 μS/cm
Total hardness
4.5 – 8.5 dH
Temperature
˂ 65°C
Oxygen content
< 0.1 ppm
Max glycol quantity
40 %
Phosphates (PO4)
˂ 2ppm
Manganese (Mn)
< 0.05 ppm
Iron (Fe)
< 0.3 ppm
Alkalinity (HCO3)
70 – 300 ppm
Chloride ions (Cl-)
< 50 ppm
Sulphate ions (SO4)
< 50 ppm
Sulphide ions (S)
None
Ammonium ions (NH4)
None
Silica (SiO2)
< 30 ppm
6.5.2Condensation discharge system
All HP_OWER ONE units are built in such a way that the base of the unit acts as a condensate drip tray. A plastic fitting is standard
supplied to be connected below the base in the specific slot in order to connect a pipe which channels the condensate.
Each unit is therefore fitted with a hole on the base of the hydronic kit (on the coil side) to drain condensation which could drip
from the pipes of the plumbing system. Since these pipes are well insulated, a minimum amount of condensation is produced
anyway and therefore it is not mandatory to connect a drain pipe to this fitting.
IF THE CLIMATE IS PARTICULARLY RIGID, INSTALLATION ON ELEVATION SUPPORTS IS RECOMMENDED TO
PREVENT THE UNIT FROM DAMAGING IN CASE OF ICE FORMATION.
Hole in bottom panel of
outdoor unit
Gasket
Gasket
Drain fitting

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6.5.3Filling the system
CAUTION: supervise all filling/top-up operations.
CAUTION: before filling/topping up the system, disconnect power to the units.
CAUTION: the system must always be filled/topped up in controlled pressure conditions (max 1 bar). Make sure
that a pressure reducer and safety valve have been installed on the filling/top-up line.
CAUTION: the water on the filling/top-up line must be appropriately pre-filtered from any impurities and
suspended particles. Make sure that a removable cartridge filter and dirt separator are installed on the line.
CAUTION: regularly check and vent the air built up in the system.
CAUTION: install an automatic air venting valve at the highest point of the system.
6.5.4Service sleeves
2 service sleeves with cap (1/4”G) are installed in the unit’s water circuit, downstream and
upstream of the circulator (ref. SM unit functional diagram paragraph 5.6.2); when
disassembling/fitting on the cap use 2 spanners as pictured to prevent damaging the pipes.
6.5.5Air venting valve
The unit is fitted with an air venting valve to automatically remove air that has built up in the
circuit, preventing undesirable effects such as premature corrosion and wear, lower performance
and low exchange output.
The device also features a safety function because, in the event of exchanger breakdown, it allows
the refrigerant gas to escape outside, preventing it fro being conveyed to the internal terminals.
The valve can be kept in a closed position by closing the plug on the drain; by loosening the plug,
the valve remains in
open position and air is vented automatically.
If it is necessary to top up the system or adjust the glycol content, the auxiliary
tap can be used. Unscrew the service tap hood (A) and connect a 14 or 12 mm
hose (internal diameter measurements - check the model of tap installed on your
unit) connected to the water mains to the rubber bracket, then load the system by
unscrewing the appropriate nut ring (B). At the end of the operation, tighten the
ring nut (B) again and screw the cap (A) back on.
In any case, it is
recommended to use an external tap to fill the system, which is set up by the
installer.

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In the event of observing a water leak, it is mandatory to replace the component, by loosening it with a wrench, as
pictured below.
6.5.6System unloading
If the unit has to be completely drained, first close the manual inlet and outlet gate valves (not supplied) and then disconnect the
pipes arranged externally on the water inlet and outlet in order to let the liquid contained in the unit escape (to make the
operation is easy, it is advisable to install two drain cocks interposed between the unit and the manual gate valves externally on
the water inlet and outlet).

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6.5.7HYDRAULIC CIRCUIT
HP_OWER ONE 70R - 70RK - 90R - 90RK HP_OWER ONE 120R - 120RK-120RT
HP_OWER ONE 140R - 140RK - 160RT - 160RTK - 180R - 180RK KEY
TE IE
UTILITY INLET TEMPERATURE PROBE
TEOE
UTILITY OUTLET TEMPERATURE PROBE
DV
DRAIN VALVE
RV
SAFETY VALVE
FL FLOW SWITCH
P PUMP
AV AUTOMATIC AIR VENTING VALVE
SM SERVICE SLEEVE
PROTECTION AND CONTROL CALIBRATIONS
Desciption
Value
High pressure switch
42,8 bar
High pressure alarm
41,5 bar
Low pressure alarm
It depends on the unit
Maximum number of restarts after high /
low pressure alarm (manual reset) 3
Defrost protection Alarm output: 4 °C
Alarm return: +7°C
hydronic circuit safety valve
6 bar

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6.6 REFRIGERANT DIAGRAM HP_OWER ONE 70R – 70RK - 90R – 90RK
CODE
DESCRIPTION
CODE
DESCRIPTION
MC
COMPRESSOR
H/CS
UTILITY WATER OUTLET
CO/EV
CONDENSER (IN CHILLER MODE)
H/CR
UTILITY WATER INLET
EV/CO
EVAPORATOR (IN CHILLER MODE)
PEHTC
HIGH PRESSURE TRANSDUCER
EEV
ELECTRONIC EXPANSION VALVE
PEDTR
LOW PRESSURE TRANSDUCER
YISV
4-WAY CYCLE REVERSING VALVE
TE
OUTDOOR AIR TEMPERATURE PROBE
LR
LIQUID RECEIVER
TE SD
INTAKE LINE TEMPERATURE PROBE
F
FILTER
TE DT
COMPRESSOR DISCHARGE TEMPERATURE PROBE
SV
FILLING CONNECTION
PSHC
AUTOMATIC RESET HIGH-PRESSURE SWITCH
HC
CRANKCASE HEATER
MAF
AXIAL FAN
MF
MUFFLER
LS
LIQUID SEPARATOR
RS
INTAKE LINE
RD
DELIVERY LINE
RL LIQUID LINE
RD/RS DELIVERY/INTAKE LINE
RS/RD INTAKE/DELIVERY LINE

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6.7 REFRIGERANT DIAGRAM HP_OWER ONE 120R – 120RK - 120RT
6.8 REFRIGERANT DIAGRAM HP_OWER ONE 140R - 140RK - 160RT – 160RTK - 180R - 180RK