Ferroli RHA series User manual

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RHA
AIR COOLED WATER CHILLERS
AND HEAT PUMPS WITH AXIAL FANS
351 ÷ 625 kW in cooling mode
370 ÷ 658 kW in heating mode
INSTALLATION MANUAL
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The manufacturer declines all responsibility for any inaccuracies in this manual due to printing or typing errors.
The manufacturer reserves the right to modify the products contents in this catalogue without previous notice.
Dear Customer,
Thank you for having purchased a FERROLI Idustrial coolers. It is the result of many years experience, particular research and has
been made with top quality materials and higlly advanced technologies.The CE mark guaranteed thats the appliances meets Euro-
pean Machine Directive requirements regarding safety.
The qualitative level is kept under constant surveillance. FERROLI products therefore offer SAFETY, QUALITY and RELIABILITY.
Due to the continuous improvements in technologies and materials, the product specication as well as performances are subject to
variations without prior notice.
Thank you once again for your preference.
FERROLI S.p.A

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TABLE OF CONTENTS
THIS MANUAL IS DIVIDED INTO SECTIONS. THEIR NAMES APPEAR IN THE HEADING OF EACH PAGE.
GENERALSPECIFICATIONS...............................4
Generalspecifications..................................4
EuropeanDirectives....................................4
IdentificationplateoftheUnit.............................4
Presentationoftheunit .................................5
Identificationcodeoftheunit.............................5
Descriptionofthecomponents............................6
Version with Desuperheater VD (available for both IR units and IP units) . 8
ACCESSORIES AND OPTIONAL EQUIPMENT. . . . . . . . . . . . . . . . . 9
Mechanicalaccessories.................................9
Electricalaccessories...................................12
Mechanicaloptions ....................................12
Electricaloptions......................................12
GENERAL TECHNICAL SPECIFICATION . . . . . . . . . . . . . . . . . . . . . 13
General technical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
NOMINALPERFORMANCES...............................14
Standard unit AB - MEDIUM TEMPERATURE PLANT -
DatacertifiedbyEUROVENT ............................14
Standard unit AB - LOW TEMPERATURE PLANT . . . . . . . . . . . . 14
Standard unit AB - MEDIUM TEMPERATURE PLANT -
Data declared according to UNI EN 14511 . . . . . . . . . . . . . . . . . . 15
Standard unit AB - LOW TEMPERATURE PLANT -
Data declared according to UNI EN 14511 . . . . . . . . . . . . . . . . . . 15
Low noise unit AS - MEDIUM TEMPERATURE PLANT -
DatacertifiedbyEUROVENT ............................16
Low noise unit AS - LOW TEMPERATURE PLANT. . . . . . . . . . . . 16
Low noise unit AS - MEDIUM TEMPERATURE PLANT -
Data declared according to UNI EN 14511 . . . . . . . . . . . . . . . . . . 17
Low noise unit AS - LOW TEMPERATURE PLANT -
Data declared according to UNI EN 14511 . . . . . . . . . . . . . . . . . . 17
Extra low noise unit AX - MEDIUM TEMPERATURE PLANT -
DatacertifiedbyEUROVENT ............................18
Extra low noise unit AX - LOW TEMPERATURE PLANT. . . . . . . . 18
Extra low noise unit AX - MEDIUM TEMPERATURE PLANT -
Data declared according to UNI EN 14511 . . . . . . . . . . . . . . . . . . 19
Extra low noise unit AX - LOW TEMPERATURE PLANT -
Data declared according to UNI EN 14511 . . . . . . . . . . . . . . . . . . 19
STANDARD PERFORMANCES - IR COOLING UNIT ONLY. . . . . . . 20
Performances - Standard unit AB. . . . . . . . . . . . . . . . . . . . . . . . . . 20
Performances - Low noise unit AS. . . . . . . . . . . . . . . . . . . . . . . . . 21
Performances - Extra low noise unit AX. . . . . . . . . . . . . . . . . . . . . 22
STANDARD PERFORMANCES - IP HEAT PUMP UNITS . . . . . . . . . 23
Performances in cooling mode - Standard Unit AB . . . . . . . . . . . . 23
Performances in heating mode - Standard Unit AB . . . . . . . . . . . . 24
Performances in cooling mode - Low noise Unit AS . . . . . . . . . . . 25
Performances in heating mode - Low noise Unit AS . . . . . . . . . . . 26
Performances in cooling mode - Extra low noise Unit AX . . . . . . . 27
Performances in heating mode - Extra low noise Unit AX . . . . . . . 28
CORRECTION FACTOR FOR THE USE OF GLYCOL . . . . . . . . . . . 29
Correction factor for the use of glycol IN HEATING MODE . . . . . . 29
Correction factor for the use of glycol IN COOLING MODE . . . . . 29
Foulingfactors........................................29
GENERAL SPECIFICATIONS - BRINE UNIT BR - BP. . . . . . . . . . . . 30
BrineUnit(BR)........................................30
GENERAL SPECIFICATIONS - VERSION WITH DESUPERHEATER
(VD)IRCOOLINGUNITONLY..............................31
Acoustic Version: AB (Standard Unit) . . . . . . . . . . . . . . . . . . . . . . 31
Acoustic Version: AS (Low noise Unit) . . . . . . . . . . . . . . . . . . . . . 31
Acoustic Version: AX (Extra low noise Unit) . . . . . . . . . . . . . . . . . 31
Performances Version with Desuperheater (VD) . . . . . . . . . . . . . 32
GENERAL SPECIFICATIONS - VERSION WITH DESUPERHEATER
(VD)IPHEATPUMPUNIT .................................33
Acoustic Version: AB (Standard Unit) . . . . . . . . . . . . . . . . . . . . . . 33
Acoustic Version: AS (Low noise Unit) . . . . . . . . . . . . . . . . . . . . . 33
Acoustic Version: AX (Extra low noise Unit) . . . . . . . . . . . . . . . . . 33
Performances Version with Desuperheater (VD) . . . . . . . . . . . . . 34
GENERAL SPECIFICATIONS - FULL HEAT RECOVERY UNIT (VR)
IPHEATPUMPUNIT......................................35
Acoustic Version: AB (Basic Unit) . . . . . . . . . . . . . . . . . . . . . . . . . 35
Acoustic Version: AS (Low noise Unit) . . . . . . . . . . . . . . . . . . . . . 35
Acoustic Version: AX (Extra Low noise Unit) . . . . . . . . . . . . . . . . . 35
Full Heat recovery unit performances (VR) . . . . . . . . . . . . . . . . . . 36
NOISELEVELS..........................................37
StandardUnitAB......................................37
LownoiseunitAS......................................37
ExtralowmoiseunitAX.................................37
OPERATINGRANGE .....................................38
Operatingrange.......................................38
WATER PRESSURE DROP EVAPORATOR . . . . . . . . . . . . . . . . . . . 39
Operatingrange.......................................39
WATER PRESSURE DROP DESUPERHEATER. . . . . . . . . . . . . . . . 40
Operatingrange.......................................40
WORKINGHEADOFTHEPUMPINGMODULEMPAMSTDANDMPSSSTD ..41
Operatingrange.......................................41
HIGH WORKING HEAD OF THE PUMPING MODULE MP AM HP1
AND MP SS HP1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Operatingrange.......................................42
RECEPTIONANDPOSITIONING............................43
Inspectionsonarrival...................................43
Safetyprescriptions....................................43
Handling.............................................43
Storage..............................................44
Packingremoving......................................44
Positioning...........................................44
DIMENSIONALDATA.....................................45
Overalldimensions.....................................45
Descriptionofthecomponents............................45
Minimum space required for operation. . . . . . . . . . . . . . . . . . . . . . 46
Vibration-damper installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Condensation.........................................46
Areaofsupport........................................46
Weightduringtransport.................................47
Weightduringoperation.................................48
HYDRAULICCONNECTIONS...............................50
Generalrules.........................................50
Hydrauliclayoutofthesystem............................50
PrecautionsfortheWinter...............................50
Basic diagram Standard Unit VB [PLANT SIDE WATER CIRCUIT] 51
Basic diagram for units with Desuperheater
[RECOVERY WATER CIRCUIT] . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Airventandwaterdrain.................................52
Piping connection with Victaulic couplings and Water flow switch 52
Valve regulating diagram valve . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
ELECTRICALCONNECTIONS..............................54
Generalrules.........................................54
Structure of the electric panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Compositionofthesystem...............................54
Electricalconnections ..................................54
Unitlayout ...........................................54
R410APROTECTIONDEVICES.............................57
SERIAL INTERFACE: RS485 MODBUS® RTU . . . . . . . . . . . . . . . . . 58
REFRIGERANT FLOW DIAGRAM - STANDARD UNIT VB. . . . . . . . 61
Refrigerant flow diagram in cooling mode IR . . . . . . . . . . . . . . . . . 61
Refrigerant flow diagram in heating mode IP. . . . . . . . . . . . . . . . . 62
REFRIGERANT FLOW DIAGRAM - DESUPERHEATERS UNIT VD 63
Refrigerant flow diagram in cooling mode IR . . . . . . . . . . . . . . . . . 63
Refrigerant flow diagram in heating mode IP. . . . . . . . . . . . . . . . . 64
START-UP..............................................65
GeneralRules ........................................65
MAINTENANCE..........................................65
GeneralRules ........................................65
Routinemaintenance...................................65
Generalconsiderations .................................67
SAFETYANDPOLLUTION.................................68
Refrigerantsafetycard..................................68
Firstaid .............................................70

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GENERAL SPECIFICATIONS
General specifications
European Directives
• This manual and the wiring diagram supplied with the unit must be kept in a dry place and ready to hand for future consultation
when required.
• This manual has been compiled to ensure that the unit is installed in the correct way and to supply comprehensive information
about how to correctly use and service the appliance. Before proceeding with the installation phase, please carefully read all the
information in this manual, which describes the procedures required to correctly install and use the unit.
• Strictly comply with the instructions in this manual and conform to the current safety standards.
• The appliance must be installed in accordance with the laws in force in the country in which the unit is installed.
• Unauthorized tampering with the electrical and mechanical equipment will VOID THE WARRANTY.
• Check the electrical specifications on the identification plate before making the electrical connections. Read the instructions in the
specific section where the electrical connections are described.
• If the unit must be repaired for any reason, this must only be done by a specialized assistance center recognized by the manufacturer
and using geuine spare parts.
• The manufacturer also declines all liability for any damage to persons or property deriving from failure of the information in this
manual to correspond to the actual machine in your possession.
• Proper uses: this series of chillers is designed to produce cold or hot water for use in hydronic systems for conditioning/
heating purposes. The units are not suitable for the production of domestic hot water.
Any use differing from this proper use or beyond the operating limits indicated in this manual is forbidden unless
previously agreed with the manufacturer.
• The prevention of the risk of fire at the installation site is the responsiblity of the end user.
The company hereby declares that the machine in question complies with the matters prescribed by the following Directives:
• Machine Directive 2006/42/CE
• Directive governing pressurized vessels (PED) 97/23/CE
• Electromagnetic compatibility Directive (EMC) 2004/108/CE
• Low voltage Directive (LVD) 2006/95/CE
Any other Directives have to be considered not applicable.
Identification plate of the Unit
The figure on the left depicts the identification plate of the unit, affixed to the outer left-hand side of
the Electric Panel.
A description of the data is given below:
Standard versions
A - Trademark
B - Model
B1- Code
C - Serial number
D - Cooling Capacity
E - Heating Capacity
F - Power input in COOLING mode
G - Power input in HEATING mode
H - Reference standard
I - Electric power supply
L - Maximum load current
M - Type of refrigerant and charge
N - Shipping weight of the unit
O - Sound pressure level at 1m
P - IP Level Protection
Q - Maximum pressure - High Side
R - Maximum pressure - Low Side
S - PED certification authority
Special versions
A - Trademark
B - Model
B1- Code
C - Serial number
D - Cooling Capacity (same as Standard Version of the unit)
E - Heating Capacity
for IR unit, VD version, Recovered Heating Capacity
for IP unit, VD version, Heating Capacity / Recovered Heating Capacity
F - Power input in COOLING mode (same as Standard version of the unit)
G - Power input in HEATING mode
H - Reference standard
I - Electric power supply
L - Maximum load current
M - Type of refrigerant and charge
N - Shipping weight of the unit
O - Sound pressure level at 1m
P - IP Level Protection
Q - Maximum pressure - High Side
R - Maximum pressure - Low Side
S - PED certification authority
NOTE: The identification plate of the Brine Unit (BR - BP) is filled out as
shown in the diagram for the Basic Version of the unit (VB).
Codice
Code B1 Rev
Ferroli Spa
Via Ritonda 78/A
(VR) Italy

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GENERAL SPECIFICATIONS
The available special versions are described below:
VB: Standard unit.
VD: Version with Desuperheater (available forboth IR units and IP units)
Produces cold water in the same way as the standard version plus hot water from 30 to 70°C at the same time. This is achieved by installing a
water-refrigerant gas heat exchanger between the compressor and coils in order to recover 20 to 25% of the heating capacity that would otherwise
be dispersed in the air.
It helps to remind that hot water production is possible only in combination with cold-hot water production in the main heat exchanger and it is
subordinated by it.
VR: Total Heat Recovery version
Produces cold water as in the standard version plus hot water at a temperature of 35 to 55°C at the same time. This is achieved thanks to a water-
refrigerant gas heat exchanger that totally recovers the heating capacity that would otherwise be dispersed in the air. The total heat recovery
function is enabled and disabled by means of a valve on the compressor delivery of each circuit: when the temperature of the water that enters
the recuperator drops, the valve switches the hot gas flow from the condensing coils to the recovery heat exchanger. On the other hand, when the
temperature of the water reaches the set-point, the valve shuts off the heat recuperator and switches the hot gas flow to the condensing coils.
It helps to remind that hot water production is possible only in combination with cold water production in the main heat exchanger and it is subor-
dinated by it.
IR- units suitable for hydronic plant
installation operating as chillers.
IP- units suitable for hydronic plant
installation operating as heat pumps.
BR- units suitable for hydronic plant
installation with Brine solutions
operating as chillers.
BP- units suitable for hydronic plant
installation with Brine solutions
operating as heat pumps.
Unit version
VB - Standard unit
VD- Desuperheater unit
VR- Full heat recovery unit
Acoustic Version
AB - Standard unit
AS - Low noise unit
AX - Extra low noise unit
Unit model
N° Compressor
Type of Refrigerant
0 - R410A
Power Supply
5 - 400V-3ph~50Hz
Operating range
M - Medium temperature. Units are
suitable to be installed in temperate
climate sites.
A - High temperature. Units are suitable
to be installed in tropical climate sites.
Unit type
RHA IP - 350.5 - VB - AB - 0 - M - 5
Identification code of the unit
The codes that identify the units are listed below and include the sequences of letters that determine the meanings for the various
versions and set-ups.
Presentation of the unit
This new series of industrial chillers and heat pumps has been designed to meet the demands of global markets in the medium-big
power industrial and commercial plants. Units are compact and highly configurable, built to fit different types of plants so to meet the
needs of highly qualified engineers.
Units are water chillers and heat pumps condensed in air with axial fans suitable for outdoor installation: the structure and panels are
robust, made of galvanized and painted steel; all fasteners are made of stainless steel or galvanized steel, the frame containing the
electrical equipment and all the components exposed to weather have a minimum IP54 degree of protection.
This series is composed of seven models divided in 6 sizes with nominal cooling capacity from 351 to 625 kW and thermal capacity
from 370 to 658 kW.
The units product cold water from 5 to 25°C (in summer) and hot water from 30 to 55°C (in winter) and as optional they are equipped
with continuous adjustment of axial fans rotating speed in order to allow the units to operate both with low outdoor temperature in
cooling mode and with high outdoor temperature in heating mode as well as to reduce noise emissions.
All the units are equipped with 5/6 scroll compressors arranged in tandem/trio on 2 circuits operating with environmental friendly
R410A gas, brazed plate heat exchanger completely insulated and protected by water side with a differential pressure control and
with an antifreeze electrical heater, electronic expansion valve, coil heat exchanger made of louver aluminum fins and copper tubes,
axial fans with profiled blades to contain noise and with thermal protection built-in, on-board electrical control panel equipped with
control system to manage the main functions.
Hydronic group (MP) composed of fittings and connections is available as an accessory with 1 or 2 pumps and also with high
available head pumps; the accessory Water Storage Tank (SAA) is completely insulated and available on delivery side or for primary-
secondary hydraulic circuit (Victaulic connections already in place) depending on the kind of plants to serve.
A variety of other accessories are available to extend the capabilities of the units.
During the design of the units particular attention has been given to achieve high system efficiency, to reduce overall energy
consumptions and sound levels in order to meet the increasingly restrictive laws in terms of noise. Upon request, you can choose for
a Standard Unit (AB) a Low Noise Unit (AS) which provides sound attenuation thanks to sound absorbing insulation in compressors
area, sound jackets on compressors, a head pressure control to reduce axial fans speed or an Extra Low Noise Unit (AX), which
provides in addition slower axial fans, more powerful finned coils and activation logic of the compressors in saturation.
All units are accurately build in compliance with the existing standards and are individually tested in factory. Only electrical and
hydraulic connections are required for installation.

6
GENERAL SPECIFICATIONS
Description of the components
1. Fans. These are the helical type with scythe-shaped blades to increase the efficiency and reduce the noise level. The fans are
directly coupled to the single-phase motor by means of an external rotor. Thermal protection against operating faults is installed insi-
de the winding. As standard they are equipped with continuous adjustment of axial fans rotating speed in order to allow the units to
operate both with low outdoor temperature in cooling mode and with high outdoor temperature in heating mode.
2. Electric control and monitoring panel.
It is housed in a cabinet made of adequately thick painted sheet metal suitable for outdoor installation (protection degree IP 54). The
panel comprises the following main components:
- Main door-locking circuit-breaker.
- Fuse holders with protection fuses for each compressor.
- Fuse holders with protection fuses for the antifreeze heater.
- Fuse holders and protection fuses for the fans (accessories).
- Fan control contactors.
- Insulating and safety transformer to power the auxiliaries, protected with fuses.
- Basic monitoring board with microprocessor
Control system main functions:
temperature control of the water produced by the unit, compressor and pump operating hour counter, timing and cycling of start-ups,
input parameters by keyboard, alarms management, smart defrosting control and operating mode change (only IP unit), dynamic
set-point (climatic control), scheduling and integrative heaters contro. If you installed the hydronic kit these functions are enabled:
antifreeze with pump, start-up cycle after prolonged inactivity (anti-sticking), if the hydronic kit installed has 2 pumps there is a cycling
between each pump to ensure an equivalent lifetime.
Digital input functions: low pressure, high pressure, high temperature on compressor supply, phase presence and sequence mo-
nitoring device on power supply, differential water pressure control, compressors thermal protection, fans thermal protection, pumps
thermal protection (only if installed MP accessory), remote ON/OFF and remote operating mode change E/I (only IP unit), demand
limit, double Set-point.
Digital output functions: compressor start-up, pump start-up (only with MP accessory), plate heat exchanger electrical heater,
remote general alarm, 4-way valve (only IP unit), additional heating management, available digital contact on compressors running.
Analogic input functions: in and out water temperature, coil temperature probe, external air temperature probe.
Analogic output functions: continuous adjustment of axial fans rotating speed (if installed).
Moreover the controller allows:
- Alarm history (max 50m alarms managed with FIFO logic)
- Time scheduling (daily and weekly)
- Precise control of the water leaving temperature
- ATC (Advanced Temperature Control) prevention of the block of the unit: In case of critical conditions the machine does not stop
but is able to regulate itself and provide the maximum power that can be generated in those conditions with the compressors working
inside the admissible limits.
-Demand Limit by Digital Input and/or by Analog Input (4-20mA)
-Double Set Point by Digital Input
-Connection to BMS (supervision systems) through serial port RS 485 and MODBUS protocol
3. User interfacing terminal with display.
Control panel: composed of the instrument’s front panel, equipped with an LCD display, three indicator LEDs, and one joystick buttons
and three function button, it enables viewing and/or checking the operating mode and parameters, resources and complete alarm
diagnostics.
In particular, it enables:
· Managing alarm situations
· Checking the status of resources.
KEY
1.Display
2. Alarms LED
3. LED for communication between the motherboard governing
the unit and the keypad
4. Power supply LED
5. Joystick Menu Button
6. Function Button
4. Compressors. They are the SCROLL type with orbiting coil equipped with built-in thermal protection and oil heater. The version
unit AS and AX includes: a soundproofing jacket for the compressors, acoustic cladding for the entire compressor compartment to
reduce the noise level and continuous adjustment of axial fans rotating speed. All units are equipped with five/six compressors con-
nected in parallel (2 cooling circuits) which can operate at the same time (100% cooling power) or individually (17-33-50-67-83-100%
of the cooling power), thus adapting to the different thermal loads of the system supplied.
5. Frame structure made of galvanized sheet metal panels coated with polyurethane powder paint to ensure maximun protection
against adverse weather conditions.
6. Evaporator made of brazed stainless steel plates (AISI 316). It is installed in a shell of heat-insulating material to prevent the
formation of condensation and heat exchanges towards the outside. Standard supply also includes antifreeze heater a differential
pressure switch on the water circuit to avoid the risk of freezing if the water flow is shut off for some reason.
1 2 3 4
5
6

7
GENERAL SPECIFICATIONS
7. Condensing coils, the aluminium finned pack type with shaped profile to increase the heat exchange coefficient and with copper
pipes arranged in staggered rows. A sub-cooling section is integrated into the lower part.
8. Covering panels, made of galvanized sheet metal coated with polyurethane powder paint to ensure maximun protection against
adverse weather conditions
9.One-way valves (IP unit only), allowing the coolant to pass into the appropriate exchangers, depending on the operating cycle.
10. 4-way cycle reversal valve (IP unit only), reverses the flow direction of the gas as the summer/winter operating mode is changed.
Hydraulic and cooling circuit components (per circuit)
11. Safety valve. Installed on the delivery pipe of the compressors, this operates if extreme faults should occur in the plant.
12. Fluid tap. Ball type, this allows the gas flow on the fluid line to be turned on and off. Along with the tap on the compressor delivery,
it allows the components of the fluid line to be subjected to extraordinary maintenance work and the compressors to be replaced if
necessary (without discharging the coolant from the unit): pump down.
13. Compressor delivery tap. Ball type, allows the gas delivered to the compressors to be turned on and off.
14. Dehydrator filter. Mechanical cartridge type. Retains impurities and traces of moisture in the circuit.
15. Fluid and humidity indicator. Signals when fluid passes through the circuit, indicating that the coolant charge is correct. The
fluid indicator light also indicates the amount of moisture in the coolant by changing colour.
16. Low pressure switch. With fixed setting. It is installed on the suction pipe and blocks the compressors if the operating pressures
drop below the tolerated values. Automatically resets as the pressure increases. If it activates frequently, the unit will block and can
only be restarted by resetting via the user interface terminal.
17. High pressure switch (n°3). With fixed setting. Are is installed on the delivery pipe and blocks the compressors if the operating pres-
sures exceed the tolerated values. If it activates, the unit will block and can only be restarted by resetting via the user interface terminal.
18. Electronic expansion valve. This supplies the evaporator correctly, keeping the selected superheating degree at a steady level.
19. Pressure taps: 1/4 “ SAE (7/16” UNF) type with flow regulator. Allow the operating pressure of the system to be measured:
compressor delivery, lamination component inlet, compressor intake.
20. Pressure taps: 5/16 “ SAE type with flow regulator. Allow the charge/discharge of the gas from the system, precisely from com-
pressor outlet an expansion valve inlet.
21. Electrical heating elements to heat the compressor oil. “Belt” type. These activate when the compressor turns off and keep
the temperature of the oil sufficiently high so as to prevent coolant from migrating during these pauses.
22. Fluid receiver (IP unit only), this is a plenum tank that accounts for variations to the coolant charge the machine must supply
as the summer/winter operating mode varies.
23. Fluid separator (IP unit only), on the compressor intake to protect against possible fluid back-flows.
24. Water differential pressure switch. This is standard supply and is installed on the connections between the water inlet and
outlet of the exchanger. It stops the unit if it activates.

8
GENERAL SPECIFICATIONS
Version with Desuperheater VD (available for both IR units and IP units)
Hydraulic and chilling circuit components:
1. Desuperheater. Specially designed for the specific version. Plate type, made of stainless steel (AISI 316).
There are installed within a shell of thermal barrier insulating material to prevent heat exchanges towards the outside. Standard
supply also includes an electric antifreeze heater to prevent the parts from freezing during the winter, when the system remains at a
standstill (if not drained).
2. Water drain cock for emptying the exchangers and pipes of the machine dedicated to heat recovery (6 bar) (Fig. 1).
3. Air vent. Accessed by removing the front panels. It consists of a manually operated valve installed in the highest part of the water
pipes. To use in conjunction with the water drain cocks situated in the rear part of the unit, for emptying the exchangers and pipes
dedicated to heat recovery.
- Water safety valve. On the heat recovery inlet pipe. It acts whenever faulty service leads to an operating pressure in the piping
system that exceeds the valve opening value (Fig.1).
1
2
3

9
ACCESSORIES AND OPTIONAL EQUIPMENT
Mechanical accessories
NOTE: The accessories can be of the following type:
(M): only installed in the factory.
(F): supplied for installation by the customer.
MP. Hydronic Kit (M). Consists of:
1 On-off ball valves. Turn components such as the water filter, surge chamber and pump on and off when they require routine or
extraordinary maintenance.
2 Metal gauze water filter. Can be turned on and off and inspected. It is installed on the pump delivery side. Prevents machining
residues (dust, swarf, etc.) in the water pipes from entering the plate-type heat exchanger.
3 Hydraulic pump. Circulates water around the system. The pumps have a low/high head and suit the majority of installation re-
quirements. The pumps are safeguarded by a magnetothermics installed in the chiller’s electric panel.
4 Surge chamber. This is a closed, diaphragm type chamber. It absorbs the variations in the volumes of water in the system cau-
sed by temperature variations.
5 Water filling. Manual function with control positioned on the side of the unit opposite the electric panel and turned on and off by
a cock that can be accessed by removing the rear panel.
6 Water pressure gauge. Connected to the water fill pipe. Displays the pressure of the water in the system.
7 Water safety valve.
8 Water outlet.
9 Air vent.
10 Antifreeze heater connection (RAG accessory).
To ensure a continuous operation, an anti-freeze with pump function (based on a reading from the output water probe) and starting
cyclic (anti-sticking) after prolonged inactivity are enabled; if the hydronic kit has 2 pumps, the second, mounted in parallel to the
first, can be activated in case of failure of the first and will also include a cycling period to guarantee to each pump an equivalent
operating time.
MP. Hydronic Kit.
MP : Hydronic Kit with 1 (M1P) o 2 (M2P) Pumps: (The second pump, mounted in parallel to the first, allows to have a spare pump
to be activated in case of failure of the first). Besides the pumps, this accessory is equipped with all the hydraulic components
(water filter, expansion tank, on-off valves, water pressure gauge, air vent, water outlet) required for complete installation and easy
maintenance.
Different water accumulation tank configurations are therefore available in combination with the Hydronic Kit accessory:
MP AM 2P STD: Accumulation on the Plant Delivery side (Standard)(A): The pump draws water from the system, sends it to the
plate exchanger and from thence to the inertial accumulation tank. During normal operating conditions, the pump in this configura-
tion is able to provide a residue head from 80 to 120 kPa (from 8 to 12 m.w.c.) for the circulating water.
MP AM 2P HP1: Accumulation on the Plant Delivery side (High)(B).: The pump draws water from the system, sends it to the plate
exchanger and from thence to the inertial accumulation tank. During normal operating conditions, the pump in this configuration is
able to provide a residue head from 160 to 210 kPa (from 16 to 21 m.w.c.) for the circulating water.
MP PS 2P STD: Accumulation pre-engineered for the primary and secondary circuit : The sole function of the pump is to circu-
late the water around the primary circuit: this circuit includes the accumulation tank and plate exchanger (chiller water circuit). The
installer must mount the pumping section relative to the secondary circuit formed by the accumulation tank (with the pre-engineered
wet connections) and the system served. No high working head version available.
MP SS 2P STD: Hydronic Kit without Water Storage Tank (Standard) (A). The pump draws water from the system, sends it to the
plate heat exchanger and returns it to the system. During normal operating conditions, the pump in this configurations can provide
a residue head from 80 to 120 kPa (from 8 to 12 m w.c.).
MP SS 2P HP1: Hydronic Kit without Water Storage Tank (High Working Head) (B).The pump draws water from the system, sen-
ds it to the plate heat exchanger and returns it to the system. During normal operating conditions, the pump in this configurations
can provide a residue head from 160 to 210 kPa (from 16 to 21 m w.c.).
Notes:
(A): For the working head values depending on the water flow rate, consult the Standard Working Head MP AM STD graph.
(B): For the working head values depending on the water flow rate, consult the High Working Head MP AM HP1 graph.

10
ACCESSORIES AND OPTIONAL EQUIPMENT
NOTE: The accessories can be of the following type:
(M): only installed in the factory.
(F): supplied for installation by the customer.
SAA- Water Storage tank (M). Painted steel water storage tank reduces compressor startup frequency and temperature fluctuation
on water side. It is coated with thermo insulated material to avoid air condensing and losses due to heat transfer. It is available on
delivery side and also for primary-secondary hydraulic circuit interface.
Water storage tank. It consists of:
Water draining. On-off action by means of a cock that can be accessed by removing the rear panel, positioned on the side of the
unit opposite to the electric panel.
Air vent. Accessed by removing the rear panel positioned on the side of the unit opposite to the electric panel. It consists of a
manually operated valve installed on the highest part of the wet pipes.
Antifreeze heater connection. 1”1/4 female threaded connection pre-engineered for installation of the antifreeze heater (RAG ac-
cessory).
Water safety valve, on the rear part of the tank. It acts whenever faulty service leads to an operating pressure in the hydraulic
circuit that exceeds the valve opening value.
KT - the following kits are available:
- Victaulic connection kit (F). This accessory consists of steel pipes insulated with thermal barrier material and allows the water
inlet/outlet to be connected straight inside the unit.
- Complete pipe kit (M). This accessory consists of steel pipes insulated with thermal barrier material and allows the water inlet/
outlet connection to be routed to the machine.
- Water storage tank pipe kit (M). This accessory consists of steel pipes insulated with thermal barrier material and allows the
water inlet/outlet connection to be routed to the machine.
NB: YOU CAN CHOOSE ONLY ONE KIT.
GP- Coil protection grid (M). Protects external surface of the finned coils.
GM- Pressure gauges kit (M). 4 pressure gauges allow visualization of high and low refrigerant gas pressure.
AVG- Rubber vibration dampers (F). Reduce vibrations transmitted to the floor by compressors and fans during normal operating
conditions (until 85%).
AVM- Spring vibration dampers (F).Reduce vibrations transmitted to the floor by compressors and fans during normal operating con-
ditions (until 90%).