Ferroli RCI 35-40 Mounting instructions

Cod. 3QE47110 - Rev. 00 - 10/2021
INSTALLATION, MAINTENANCE AND USER MANUAL
EN
RCI 35-40
A CLASS ENERGY EFFICIENCY AIRCOOLED LIQUID CHILLERS AND HEAT PUMPS
WITH AXIAL FANS, INVERTER SCROLL COMPRESSOR AND EC INVERTER

2

3
GENERAL 4
1.1 DOCUMENT INFORMATION 4
1.2 RANGE 4
1.3 ACCESSORIES 4
1.4 COMPLIANCE 5
1.5 MACHINE IDENTIFICATION 5
1.6 RESIDUAL RISK 5
1.7 INTENDED USE 6
1.8 GENERAL PRECAUTIONS 6
1.9 BASIC SAFETY RULES 7
1.10 USER GUIDELINES 7
1.11 MACHINE DESCRIPTION 7
SHIPMENT 8
2.1 INSPECTION ON RECEIPT 8
2.2 POSITION OF THE EQUIPMENT 8
2.3 EQUIPMENT 8
2.4 STORAGE 8
2.5 HANDLING 9
2.6 UNPACKING 9
2.7 ACCESS TO INTERNAL PARTS 10
2.8 RESTING ON THE GROUND 10
INSTALLATION 11
3.1 INSTALLATION LOCATION REQUIREMENTS 11
3.2 WORK FIELDS 11
3.3 UNIT LOCATION 11
3.4 VERIFYING CLEARANCES (CLEARANCE AREA) 13
WATER CONNECTIONS 14
4.1 CONNECTION DIAGRAM 14
4.2 POSITION OF CONNECTIONS 14
4.3 HYDRAULIC DATA 14
4.4 CONNECTION TO THE SYSTEM 15
4.5 SYSTEM FILL-UP 15
ELECTRICAL CONNECTIONS 16
5.1 MACHINE CONNECTION 16
5.2 CONNECTIONS OF THE ACCESSORIES 16
COMMISSIONING 17
6.1 PRELIMINARY INSPECTIONS 17
6.2 FIRST START-UP OR RESTART AFTER LONG INACTIVITY 17
6.3 SHUT-DOWN 17
6.4 FLOW RATE CALIBRATION 17
6.5 FLOW RATE BALANCE 18
CONTROL PANEL 19
7.1 USER INTERFACE 19
7.2 ON, OFF, STAND-BY 22
7.3 SETTINGS 22
7.4 ALARMS 30
MAINTENANCE 32
8.1 MAINTENANCE 32
8.2 WEEKLY CHECKS 32
8.3 MONTHLY CHECKS 32
8.4 DECOMMISSIONING AND DISPOSING 32
8.5 ANNUAL CHECKS 32
8.6 WATER CIRCUIT 33
8.7 REFRIGERANT CIRCUIT 33

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1. General
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
Document information
Range
Accessories
Compliance
Machine identification
Residual risk
Intended use
General precautions
Basic safety rules
User guidelines
Machine description
1.1 Document information
A Chapter
B Sequence of paragraphs
C Preliminary precautions
D Operations
• The manual is divided into chapters as follows:
- General;
- Shipment;
- Installation;
- Water connections;
- Electrical connections:
- Commissioning;
- Control panel;
- Maintenance.
- Attached.
• The preliminary precautions must be read before performing any of the following operations.
This document uses the following definitions:
- Danger zones: any area inside and/or near the machine in which the presence of an
exposed person constitutes a risk to his/her own health and safety.
- Exposed person: any person who is entirely or partially in a danger zone.
- Operator/Maintenance Technician: the person/s assigned to operate, adjust, service, repair
or move the machine.
1.1.1 Symbols
• This publication contains the following symbols:
Danger Draws attention to actions that can cause serious injury if not performed
correctly.
Prohibited Draws attention to actions that impose a prohibition.
1.2 Range
Models with plate evaporator
RCI 35
RCI 40
1.2.1 Available versions
RCI R Cooling only
RCI P Reversible Heat Pump
1.3 Accessories
Factory fitted accessories
BT Low water temperature kit
TX Coil with pre-coated fins
TXB Coil with epoxy treatment
PS Single circulating pump
FE Antifreeze heater for evaporator
Loose accessories
CR Remote control panel
IS Modbus RTU protocol, RS485 serial interface
RP Coils protection metallic guards
AG Rubber shock absorbers

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1.4 Compliance
The device complies with the following standards:
• Machinery directive 9898/37/EC - 2006/42/EC
• Electromagnetic Compatibility Directive 2004/108/EC
• Low Voltage Directive: 2006/95/EC
1.5 Machine identification
A Packaging plate
B Frame feature plate
C Electric board plate
The equipment can be identified from:
• Packaging plate.
- It shows the identification data of the equipment.
• Frame feature plate.
- Affixed on the machine, it shows the technical and performance data of the equipment.
• Electrical board feature plate.
- Affixed on the panel from which the electrical board is accessed, it shows the electrical
data of the equipment.
The loss of the label may compromise CE compliance. If it is lost or
deteriorated, request a duplicate from Technical Support.
Tampering with, removal and deterioration of the identification plates complicate any
installation, maintenance and spare part request.
1.6 Residual risk
Description
The description of the residual risk considers the following elements:
• the type of dangers those working around the machine are subject to;
• a description of main risks;
• who could be exposed to such risks;
• what are the main safety measures adopted to reduce the risk of injury.
The guidelines for the prevention of accidents reported below, with reference to the relative areas
of residual risk, must be integrated with all the general instructions of this chapter and with the
accident prevention regulations in force in the destination country of the system.
Residual risk near the machine
• Electrocution, if the electrical connection and earthing of the machine are not carried out
correctly.
• Cuts or abrasions due to the presence of sharp edges.
• Suction of substances in the installation site and subsequent dispersion in the environment.
• Projection of any object that may fall on the fan blades.
• Leakage of water (in case of a fault).
• Formation of condensation water and ice in the area in front of the machine during the
heating operation of the heat pump machines.
• Micro-climate alteration (during operation).
• Noise emission (during operation). The sound pressure levels of the individual units are listed
in the technical booklet.
• Oil leaks (due to a fault).
• Refrigerant gas leak (due to a fault).
Refrigerant gas is a greenhouse gas effect substance. Vapours are heavier than air and they
can cause suffocation by reducing oxygen available for breathing. Rapid evaporation of the
liquid can cause freezing.

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Measures to be adopted if refrigerant gas leaks
• Product type:
- R410A
First aid measures
• General information:
- do not administer anything to an unconscious person.
• Inhalation:
- transfer outdoors.
- use oxygen or artificial respiration if needed.
- do not administer adrenaline or similar drugs.
• Contact with eyes:
- rinse thoroughly with plenty of water for at least 15 minutes and consult a doctor.
• Contact with skin:
- wash immediately with plenty of water
- immediately remove all contaminated clothing
Measures in the event of accidental spillage
• Personal precautions:
- Move all personnel to safe areas.
- Provide adequate ventilation.
- Use personal protective equipment.
• Environmental precautions:
- Intercept the emission.
• Cleaning methods:
- Use absorbent products.
Operations with removed panels
Some of the operations and/or tests described below require the removal of the panels to access
inside the unit.
There may be hot surfaces (piping, compressor, etc.) or cold (compressor, intake separator, etc.),
sharp edges (coil fins) or moving parts (fans) even with the machine stationary.
The power supply must be disconnected before removing any panel.
Operations that require the panels to be opened must only be carried out by qualified
personnel wearing personal protective equipment.
1.7 Intended use
This unit is designed to cool water (potentially added with inhibited ethylene glycol) that
circulates in a closed circuit.
The heat pump units can cool or heat the water circuit, depending on the selected operating
cycle.
The hot or cold air produced by the machine, may be used for air conditioning systems or
industrial processes.
Any other use of the machine is forbidden.
Do not use flammable products near the machine.
Do not use substances that can form explosive mixtures close to the
machine.
Do not use the machine where there are problems of environmental
impact.
1.8 General precautions
These units must be installed by a qualified company that at the end of the work provides
the operator with a declaration of conformity with the regulations in force and the
instructions provided by the manufacturer in this document.
These units must comply with their intended use in line with their performance
characteristics.
Wear suitable and accident prevention clothing and equipment during installation and/or
maintenance. The manufacturer declines any liability for non-compliance with safety and
accident prevention regulations in force.
All unit installation, connection, start-up and shut-down operations must only be
implemented by qualified and authorised personnel.
Comply with the laws in force in the country where the machine is installed, concerning
the use and disposal of the packaging, the products used for cleaning and maintenance
and for the management when the unit life cycle is complete.
Any repairs or maintenance must be performed by the technical support of the
manufacturer or by qualified personnel, in accordance with this publication.
Preferably use original spare parts when replacing components.
If the refrigerant should leak, ventilate the room. The liquid refrigerant produces toxic gas
when exposed to a flame.
In the case of a malfunction or spill of liquid or gas refrigerant, set the main switch to "off"
and close the shut-off valves. Promptly call technical support or professional personnel. Do
not intervene personally on the unit.
If the outside temperature can drop below zero, there is a freezing hazard and the system
must be drained or anti-freeze must be added.
This unit contains fluorinated greenhouse gas covered by the Kyoto Protocol. Maintenance
and disposal must be carried out only by qualified personnel.
The feature plate of the machine indicates the total quantity of refrigerant present in the system.

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1.9 Basic safety rules
Using products that require electricity and water require some basic safety rules to be complied
with, such as:
It is prohibited to operate the unit before having disconnecting it from the power supply by
setting the main switch to "off".
It is prohibited to modify the safety devices or the settings without authorisation and
instructions from the manufacturer of the unit.
It is prohibited to pull, detach or twist the electrical cables coming from the unit, even if it
is disconnected from the power supply.
It is strictly prohibited to touch any moving parts, stand between them or introduce
pointed objects through the grids.
It is prohibited to use gas and water pipes to earth the unit.
It is prohibited to touch the unit when barefoot or with wet or damp parts of the body.
It is prohibited to stand on the unit, sit down on it and/or lean any type of object against it.
It is prohibited to dispose of and leave the packaging material in the reach of children as it
can be a potential source of danger.
It is prohibited for children or unassisted disabled persons to use the unit.
It is prohibited to release R410A in the atmosphere: R410A is a fluorinated greenhouse gas
referred to in the Kyoto Protocol with a Global Warming Potential (GWP) = 2088.
1.10 User guidelines
• Keep this manual together with the wiring diagram in a place that is accessible by the
operator.
• Take note of the unit identification data so as to provide them to the service centre when
required (see the "Machine identification" paragraph).
• It is recommended to keep track of the operations carried out on the unit, so as to facilitate any
troubleshooting.
• Request the installer to be trained on:
- switching on/shut-down;
- shutting down for long periods;
- maintenance;
- what to do/not to do in case of a fault.
In case of a fault or malfunction:
- immediately disable the unit without resetting the alarm;
- verify the type of alarm to notify the service centre;
- contact an authorised service centre;
- request original spare parts.
1.11 Machine description
1.11.1 Features
Frame.
Self-supporting frame in peraluman and galvanized steel frame, featuring rubber shock absorbers
on the base. Stainless steel screws.
Compressors.
Scroll DC Inverter three phase with oil sight glass. They are fitted with internal overheat protec
tion and crankcase heater, installed on rubber shock absorbers.
Fans.
Axial fan type with low rpm and special wing profile, directly coupled to external rotor motors.
A safety fan guard is fitted on the air flow discharge.
Condenser.
Made of a finned coil with copper pipes and aluminium fins. Complete with drain pan for hea
t pump version only.
Evaporator.
AISI 316 stainless steel braze welded plate evaporator. On the heat pump units an antifreeze he
ater is installed by standard.
Electrical board.
The electrical board includes: main switch with door safety interlock; fuses; thermal protection
relays on compressors; thermocontacts for fans; remote ON/OFF; summer/winter switching;dom
estic hot water and external 3-way valve management.
Microprocessor.
For the automatic control of the following functions: water temperature regulation, antifreeze
protection, compressor time control, alarms reset, alarms management and operating led, ala
rm cumulative contact for remote signal, local or remote cooling/heating cycle switching on he
at pump units, visual system with digital display: running cycle (cooling or heating), com
pressordemand/on, outlet water temperature, set point and differential setting, alarm code.
Proportional electronic device.
It attenuates the sound level of the unit using a continuous regulation of fan rotation speed.
This device also allows the cooling operation of the unit to outdoor air temperatures of -20 °C.
Control logic of the Inverter Scroll compressor.
Through the Inverter it adjusts the power supplied by the compressor as a function of the
system’s thermal load, the condensing pressure and the outdoor air temperature.
The control system, thanks to the Inverter technology, continuously monitors and adapts the
performance of the Inverter compressor, circulator and fans in order to grant the best operating
conditions of the unit. Thanks to Inverter logic, they are able to operate also with low water
content in the unit, thus making the use of the inertial tank superfluous.
Circuito frigorifero versione solo freddo.
Made of copper pipe, it includes the following components on all models: electronic thermostatic
expansion valve; filter drier; liquid and humidity indicator; high pressure switch (with fixed
setting); high and low pressure transducers.
Circuito idraulico versione solo freddo.
It includes: evaporator; temperature sensor; antifreeze sensor; water differential pressure switch;
manual air vent; high efficiency EC Inverter circulator; expansion vessel; water drain; safety valve.
Circuito frigorifero versione pompa di calore.
The heat pump version, in addition to the components installed on the cooling only version,
includes: 4-way reversing valve; suction liquid separator; liquid receiver; check valves.
Circuito idraulico versione pompa di calore.
It includes: evaporator; temperature sensor; antifreeze sensor; water differential pressure switch;
manual air vent; high efficiency EC Inverter circulator; expansion vessel; water drain; safety valve.

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2. Shipment
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
Inspection on receipt
Position of the equipment
Equipment
Storage
Handling
Unpacking
Access to internal parts
Resting on the ground
2.1 Inspection on receipt
A Packaging plate
• Before accepting the delivery, check:
- That the unit has not been damaged during transport.
- That the delivered material corresponds to what is indicated on the transport document
comparing the data with the packaging plate.
• In case of damage or faults:
- Immediately take note of the damage on the shipping document and write: “Accepted
with reservations for evident loss/damage during transport”.
- Submit a complaint by fax and by registered mail with return receipt to the carrier and the
supplier.
2.2 Position of the equipment
Removing the front panel provides access to the pocket containing the documentation.
A Front panel
Keep the documentation in a dry place to prevent deterioration, for at least 10 years for
future reference.
Any accessories that are not factory-fitted are supplied in separate packages, with a
relevant instruction sheet.
2.3 Equipment
• Installation, operating and maintenance manual;
• Wiring diagram;
• Refrigerant diagram;
• Water diagram;
• List of parameters.
2.4 Storage
The room temperature in which the units are stored must be between -20 / +50°C.

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2.5 Handling
• The equipment is designed for two lifting systems.
It is prohibited to use the pipes or other components of the machine as lifting points.
During moving it is forbidden to pass the maximum inclination consented as indicated in
the figure.
2.5.1 Lifting with forks
A Support
• Insert the forks from the side;
• Before placing the machine on the ground remove the wooden supports.
2.5.2 Lifting with a crane
A Lifting bar
B Hole for the insertion of the bar
C Indication of enabled holes
• Insert the lifting bars into the arranged holes on the base and indicated by the relative labels.
• Lift the unit using suitable belts.
It is recommended to use a system to prevent the belts from slipping from the bars during
lifting.
Place spacers and protectors in between prevent damaging the unit.
Make sure that all the equipment used for handling (belts, bars, etc.) are appropriate for
the weight of the unit.
2.6 Unpacking
A Wooden support
B Corner protector
C Coil protection
D Shrink
Before positioning the unit in the right installation place, remove the protective packing.
• Cut and remove the heat-shrink coating.
• Remove the corner protectors.
• Remove the protection from the coil.

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• Lift the unit and remove the wooden supports.
The machine is supplied without shock absorbers. Install any shock absorbers before
resting the machine definitely on the ground.
Only remove the packaging when set in the place of installation.
2.7 Access to internal parts
A Front panel
B Rear panel
To access to internal parts of the unit:
• Turn off power to the machine.
• Remove the front panel.
2.8 Resting on the ground
The unit must be positioned on a perfectly horizontal surface that is able to withstand its
weight.
Positioning must be performed slowly and so that all support points are touching the floor.

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3. Installation
3.1
3.2
3.3
3.4
Installation location requirements
Work fields
Unit location
Verifying clearances (clearance area)
3.1 Installation location requirements
The installation place must be chosen as specified in standard EN 378-1 and the requirements of
standard EN 378-3. In any case, the installation site must consider the risks associated with an
accidental leak of refrigerant gas contained in the direct expansion units. Do not install the unit
near flammable materials or others that could cause a fire. Provide specific fire-fighting measures.
3.2 Work fields
The work fields are indicative, near the operating range limits the units may choke the cooling
capacity.
Check the actual capacity by using the capacity tables or the selection software.
Operating mode: cooling
Standard operation
Ta Ambient air temperature (°C)
To Outlet water temperature (°C)
Operating mode: heating
Standard operation
Ta Ambient air temperature (°C)
To Outlet water temperature (°C)
3.3 Unit location
The unit should be positioned far from any obstacle.
It is forbidden to place the unit under roofs, coverings or inside air vents.
The heat pump units allow ice and condensation to form that pours on to the floor in front
of the unit. Collect and drain the condensation and defrost water to prevent the floor from
becoming slippery.

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3.3.1 Noise
During operation, the unit generates noise.
Avoid installation in reverberant environments.
Avoid placing the machine with the side of the coil in the direction where the noise level is
more critical.
3.3.2 Windy areas (Resting on the ground)
Wind can affect the operating conditions. Minimise the effects by:
• Placing the unit with the long side parallel to the direction of the main winds.
Avoid placing it with the coil perpendicular to the direction of the main wind.
3.3.3 Resting on the ground
A Rubber tape
H Slab height
• Place the unit on a perfectly level support surface.
• Place a hard rubber band between the base of the machine and the support surface.
Verify that the support surface withstands the weight of the unit.
Provide a supporting slab of proportional dimensions with the unit if resting on unstable
ground.
The slab must be horizontal and able to withstand approximately 200% of the operating
weight of the machine.
If necessary, use shock absorbers (rubber or spring).

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3.4 Verifying clearances (clearance area)
W1 1000 mm
W2 500 mm
L1 1800 mm
L2 1800 mm
• Installation, in addition to the spaces indicated, must enable access to the authorised
personnel for the maintenance operations and must take into account the safety distances
from any other equipment installed near the machine.

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4. Water
connections
4.1
4.2
4.3
4.4
4.5
Connection diagram
Position of connections
Hydraulic data
Connection to the system
System fill-up
4.1 Connection diagram
1 Unit
ANT Anti-vibration joint (recommended)
CV Check valve
FL Flow switch (mandatory)
FTR Mesh filter (mandatory)
MN Water gauge
MP Circulating pump
RI Shut-off ball valve
RIC Automatic water filling valve
SFA Automatic air vent (mandatory)
ST Inertial tank
VE Expansion vessel
VSI Safety valve (mandatory)
Some of the components in the diagram may already be included in the unit with the
hydronic kit. Those not included must be provided by the installer.
Connection pipes must have a suitable diameter and be supported so as not to impose
their weight on the unit.
4.2 Position of connections
The position of the water connections and the inlet and outlet direction is indicated by the labels
on the connections.
4.3 Hydraulic data
4.3.1 Water volume
The machine electronic control, to protect the electrical motor, limits hourly start up of the
compressor.
This operation creates oscillations of the water temperature in the draw-off point, affecting plant
efficiency.
For a proper operation it is necessary the water content complies with the following table:
Evaporator water flow Model
91 101 131 151
Pmin l/s 0.95 0.85 1.01 1.14
Pmax l/s 1.85 2.26 2.71 3.05
V L 70 85 105 120
Pmin Evaporator minimum flow
Pmax Evaporator maximum flow
V Water volume
If the water volume in the circuit (V) does not reach what is indicated, installing a new inertial
storage tanks shall be required.
4.3.2 Water features
Water features are important for the proper operation of the machine and for its lifetime.
Extreme water hardness leads to the formation of limestone in exchangers reducing their
performance.
The table shows some water parameters to be observed for proper operation of the machine.
Content Concentration mg/l or ppm Material
AISI 316L Copper
pH
<6 2 2
6-7.5 2 2
7.5-9 1 1
>9 1 2
Alkalinity HCO3
- <70 1 2
70-300 1 1
>300 1 2
Sulphate SO42-
<70 1 1
70-300 1 3
>300 1 3
Alkalinity/Sulphate HCO3-/SO42- >1 1 1
<1 1 3
Electrical conductivity μS/cm
<10 1 2
10-500 1 1
>500 1 2
Ammonium NH4
<2 1 1
2-20 1 2
>20 1 3
Free chlorine Cl2
<1 1 1
1-5 3 1
>5 3 3
Hydrogen Sulphide H2S <0.05 1 1
>0.05 1 3
Free Carbon Dioxide CO2
<5 1 1
5-20 1 2
>20 1 3
Nitrate NO3 <100 1 1
>100 1 2
Iron Fe <0.2 1 1
>0.2 1 2
Aluminium AL <0.2 1 1
>0.2 1 2
Manganese MN <0.1 1 1
>0.1 1 2
1 - Good corrosion resistance.
2 - If different factors of this type are present, corrosion can occur.
3 - Use not recommended.
4.3.3 Protection against freezing
If you do not wish to drain the system during periods where the machine is not used, the water
may freeze, or if the system must operate with temperatures less than 5°C, ethylene glycol must
be mixed with the water.

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Adding glycol changes the physical characteristics of the water and the performance of the
machine.
The table indicates the multiplicative factors to calculate the performance change based on the
percentage of glycol used.
% G 0 10 20 30 40 50
Tc 0 -4.5 -9.5 -15.5 -21.5 -32.5
CQ 1 0.975 0.953 0.931 0.914 0.882
CP 1 1.01 0.995 0.99 0.985 0.975
CG 1 1.01 1.04 1.08 1.14 1.20
CP 1 1.05 1.13 1.21 1.26 1.32
% G = Glycol percentage
Tc = Water freezing temperature (°C)
CQ = Cooling capacity correction factor
CP = Electrical power absorbed correction factor
CG = Correction factor of mixing flow
Cp = Pressure drops correction factor
4.4 Connection to the system
A Rear panel
In these models connections are placed outside the unit.
• Remove the protection caps from the connections.
• Connect the pipes to the connections.
Provide shut-off valves and anti-vibration joints on the connection pipes.
For threaded connections:
• Fasten by holding a part in order o tighten the other part.
• It is recommended to seal with hemp and green paste.
4.5 System fill-up
A Pump drainage shut-off valve
• Before performing any operation, make sure the main switch is off.
• If the hydronic kit is installed, make sure the pump drainage shut-off valve (A) is closed.
• Make sure that the drain valves are closed and the air vent valves are open.
• Open the shut-off valves of the water system.
• Start filling.
• When the water begins to leak from the vent valves, close them and bring the water pressure
to the value required by the system (1 - 1.5 bar). Keep in mind that safety valve calibration is
6 bar.
• When the water pressure has stabilised (read the pressure gauges installed on the upper side),
close the fill-up valve and check the tightness of the various joints.
It is advisable to periodically check the pressure in the water circuits to prevent
malfunctions.
The water circuits must always be topped-up with the pumps off.

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5. Electrical
connections
5.1
5.2
Machine connection
Connections of the accessories
5.1 Machine connection
A Access to electrical board
The unit already has holes for the power supply cables to be inserted.
• Insert the cables from the outside, guiding them towards the electrical board.
Avoid direct contact with non-insulated copper pipes and with the compressor.
It is forbidden to enter the device with electrical cables in positions not specifically required
in this booklet.
To set up the electrical connections:
• Set the main switch to 0.
• Open the electrical board compartment (A).
• Make the connections as shown in the wiring diagram.
• Use the hole for the main power cable and the hole for the cables of other external
connections.
• After completing the electrical connections lock the cables with the cable glands and close the
doors of the electrical board.
Before connecting the remote ON-OFF switch, remove the jumper from
the relative clamps.
5.2 Connections of the accessories
5.2.1 External consents
If you wish to enable or disable the unit remotely, connect the external consent to the contacts
listed in the wiring diagram.
Avoid placing the control cables in the same duct as the power cables. Always use a
suitable shielded cable.
The connection cables must have a minimum cross section of 1.5 mm².

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6. Commissioning
6.1
6.2
6.3
6.4
6.5
Preliminary inspections
First start-up or restart after long inactivity
Shut-down
Flow rate calibration
Flow rate balance
6.1 Preliminary inspections
6.1.1 Electrical
• Verify that the voltage on terminals L1, L2 and L3 is that shown on the plate of the unit
(tolerance allowed) ±5%, which can be checked with a tester. If voltage changes occur
frequently, please contact our technical department to choose suitable protections.
• Verify the complete tightness of the fuse holder caps.
• Verify that the crankcase heaters (if applicable) are powered correctly: to check whether the
heaters are working properly, check that the bottom of the compressor is at a temperature of
10 to 15 °C higher than the ambient temperature.
• Power and check the correct direction of rotation for the three-phase version, which should be
clockwise looking at the motor from the fan side. Otherwise, invert any two of the phase
conductors.
6.1.2 Hydraulic
• Make sure that the water circuit has been previously cleaned: it is recommended to wash the
water circuit via by-passing the unit and then check the cleanliness of the system filter.
• The machines are shipped with open vents and drains, which must be closed during
installation when filling the water circuit. Labels indicate their positions.
• Make sure that the hydraulic system has been bled, thereby eliminating any residual air. The
operation must be performed by loading gradually and opening the venting devices set up by
the installer in the upper part of the system.
• If you are using glycol water you can move the antifreeze set-point. The value must be equal
to the value of the freezing temperature of the fluid plus 6K.
6.1.3 Cooling
• Check that there is no refrigerant leak, possibly using a leak detector.
6.2 First start-up or restart after long inactivity
6.2.1 Start-up
Activate the machine according to that described in the relative command section.
6.2.1.1 Checks during operation
• Check that the machine does not generate abnormal noise or excessive vibrations.
• After a few hours of operation verify that the crown of the liquid and humidity indicator
indicates a dry circuit.
• Verify that the machine operates within the optimum working range.
• Verify that there is no excessive presence of bubbles in the liquid indicator. If there are this
indicates low refrigerant.
• A few minutes after the compressors are started, during the summer mode cycle, make sure
that the condensing temperature is 18±4K higher than the air temperature entering the
condenser and that the average evaporating temperature is approximately 5K lower than the
water temperature leaving the utility exchanger.
• Verify that the overheating temperature of the refrigerant is between 5 and 7K. To verify:
- Measure the temperature with a contact thermometer placed on the intake pipe of the
condenser .
- Read the temperature indicated on the pressure gauge connected to the inlet.
- The difference between these temperatures provides the overheating value.
• Verify that the subcooling temperature of the refrigerant is between 4 and 8K. To verify:
- Measure the temperature with a contact thermometer placed on the outlet pipe from the
condenser.
- Read the temperature indicated on a pressure gauge connected to the liquid outlet of the
condenser.
- The difference between these temperatures provides the subcooling value.
6.3 Shut-down
6.3.1 Temporary shut-down
Disable the machine according to that described in the relative command section.
Do not disconnect the power supply by acting on the disconnecting switch on board the
machine or the main switch of the system. If there is no voltage, the crankcase heaters and
the antifreeze heaters cannot work, thereby, posing a risk of freezing.
The antifreeze protection function is only active if the unit is in “STAND-BY” mode. In case
of operation, the unit controls pump start-up.
To safeguard the system and the units, we recommend installing an electrical heater on
the connection pipes, or to fully empty the system.
The pump must be installed and supplied by the user. We recommend keeping the pump
supplied even during periods of prolonged system inactivity to enable proper operation of
the antifreeze function.
6.3.2 shutting down for long periods;
Not using the unit for a long period of time requires the following operations to be performed:
• Disable the unit in any mode of operation it may be, from the control panel.
• Set the remote switch to "OFF" (if present) after having turned off the unit.
• Disable the internal terminal units by setting the switch of each unit to "off".
• Set the main switch of the system to ''off''.
• Close the water valves.
If, during the period of inactivity the temperature drops below zero, the system must be
fully empties or topped up with antifreeze liquid.
6.4 Flow rate calibration
Once the pump has started, verify that the fluid flow rate of the utilities is within the expected
values for the unit.
To verify:
• Use pressure gauges set before and after the circulating pump to measure the pressure
difference.
• Verify that the pressure difference measured is equal to the pressure drop in the system,
including the heat exchanger.
To correct:
• Turn the valve installed downstream of the pump to increase or decrease the pressure
difference.
• Mark the position of each valve to reposition it in the same position after closing for
maintenance operations.
If there are no pressure gauges:
• Verify the temperature difference between the utility fluid input and output when the unit is
operating regularly (all compressors on).
• The difference in water temperature between input and output must be between 4° and 6°C:

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- If it is below 4°C, the water flow rate is too high: slightly close the discharge valve of the
pump.
- If it is more than 6°C, verify the pressure drops in the water circuit.
For systems with two pumps, you will have to repeat the calibration for each pump.
6.5 Flow rate balance
When there are multiple units in parallel, the ΔT of the water produced by the running machines
must be checked.
It may occur that the units closer to the pump produce a ΔT<5°C (high flow rate), while the units
farther away may produce a ΔT>5°C (flow rate lower than nominal values).
To correct the potential flow rate offset, the shut off valves on the inlet and outlet of each
machine must be adjusted.
Slightly close the valve on the units with high flow rate and make sure the shut off valves on the
units with lower flow rate are fully open.

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7. Control Panel
7.1
7.2
7.3
7.4
User interface
ON, OFF, Stand-By
Settings
Alarms
7.1 User interface
7.1.1 Control panel
The control panel enables all machine functions to be performed, to display its operation and any
alarms which may be triggered.
7.1.2 Display
From the display of the control panel it is possible to see the sizes of the values set and machine
operation may be displayed through the LEDs.
Values
A space of four digits can be seen on the display, from which you may read the numerical values
and letters corresponding to the entries of the menu and to the triggered alarms.
Alarm LED
The ALARM LED indicates that an alarm has been triggered.
On: triggered alarm.
Flashing: resettable alarm.
Heating LED
The HEATING LED indicates that the unit is operating in Heat Pump mode.
On: heat pump operation.
Flashing: remote heat pump operation.
Cooling LED
The COOLING LED indicates that the unit is operating in cooling only mode.
On: cooling only operation.
Flashing: remote cooling mode only.
Stand-by LED
The STAND-BY LED indicates that the unit is in Stand-By mode.
On: the unit is in Stand-By.
Flashing: the unit has been remotely placed in Stand-By.
Defrosting LED
DEFROSTING LED indicates that the unit is operating in defrosting mode.
Economy LED
The ECONOMY LED means that the economy function is on.

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Clock LED
The CLOCK LED means that the operating time bands are enabled.
On: time bands enabled.
Flashing: programming time bands.
Temperature LED
The temperature LED means that the value on the display is a temperature value in centigrade.
Pressure LED
The pressure LED means that the value on the display is a pressure value expressed in Bar.
Menu LED
The menu LED means that you are scrolling through the parameters menu.
Led 1
LED 1 indicates the Inverter compressor operation.
On: compressor in operation.
Flashing: compressor delay.
Led 3
LED 3 indicates machine operation for domestic water production.
Led 5
LED 5 means that the exchanger’s electrical heater is on.
Led 6
LED 6 means that the exchanger’s fan is on.
Led 7
LED 7 means that the circulating pump is on.
7.1.3 Keys
The keys on the control panel may be used to program and change the values of the machine
settings.
They may be used by single press (press and release), prolonged press (pressed for 3 seconds) or
with simultaneous press (simultaneously pressing 2 keys).
UP Function
By pressing the UP key once you may:
• Increase the setting of a value;
• Move up in the menu entries.
With press and hold UP key it is possible: