Ferroli RMA2 HE VB 19.1 User manual

RMA2HE
AIR-WATER CHILLERS AND HEAT PUMPS
FOR OUTDOOR INSTALLATION
INSTALLATION AND OPERATION MANUAL
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The manufacturer declines all the responsabilities regarding inaccuracies contained in this manual, if due to printing or typing mi-
stakes. The manufacturer reserves the right to apply changes and improvements to the products at any time without notice.
Dear Customer,
Thank you for having purchased a FERROLI product. It is the result of many years of experiences and of particular research studies
and has been made with top quality materials and advanced technologies. The CE mark guarantees that the products satisfy all the
applicable European Directives.
The qualitative level is kept under constant control and 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
GENERAL FEATURES ......................................................................................4
General specifications ....................................................................................4
Declaration of conformity ..................................................................................4
Unit dataplate...........................................................................................4
Unit description .........................................................................................5
Unit identification code....................................................................................5
Description of components.................................................................................6
Control system ..........................................................................................7
Versions ...............................................................................................7
ACCESSORIES AND OPTIONAL EQUIPMENT...................................................................8
Options................................................................................................8
Accessories ............................................................................................9
TECHNICAL DATA AND PERFORMANCE - BASE VERSION (VB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Technical data ..........................................................................................10
NET NOMINAL performances - Base setting up (AB) - Standard plants - EUROVENT certified data .......................11
NET NOMINAL performances - Base setting up (AB) - Radiant plants ...............................................11
NET NOMINAL performances - Low noise setting up (AS) - Standard plants - EUROVENT certified data ...................12
NET NOMINAL performances - Low noise setting up (AS) - Radiant plants ...........................................12
COOLING performances ..................................................................................13
HEATING performances ..................................................................................14
BR - BP UNIT..............................................................................................15
Corrective factors ........................................................................................15
NOISE LEVELS ............................................................................................16
ELECTRICAL DATA ........................................................................................17
Electrical data...........................................................................................17
OPERATING LIMITS ........................................................................................18
WATER PRESSURE DROP ..................................................................................19
WORKING HEAD...........................................................................................20
DIMENSIONAL AND PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Overall dimensions.......................................................................................22
Minimum operating area ..................................................................................22
Weights ...............................................................................................23
RECEPTION AND POSITIONING ..............................................................................24
Receiving ..............................................................................................24
Positioning .............................................................................................24
HYDRAULIC CONNECTIONS.................................................................................25
General rules ...........................................................................................25
Protection devices .......................................................................................25
Tips for a successful installation ............................................................................25
Water component for corrosion limit .........................................................................26
Precautions for the Winter .................................................................................26
Air vent and water drain ...................................................................................26
Maximum volume of water in the system with wet module ........................................................26
ELECTRICAL CONNECTIONS ................................................................................27
Electrical connections ....................................................................................27
R410A PROTECTION DEVICES...............................................................................28
REFRIGERANT FLOW DIAGRAM .............................................................................29
IR unit.................................................................................................29
IP unit .................................................................................................29
CONTROL SYSTEM ........................................................................................30
Control system ..........................................................................................30
Menu structure ..........................................................................................32
Inputs and outputs .......................................................................................33
Controller technical data ..................................................................................33
Alarms ................................................................................................34
Alarms table ............................................................................................35
Functions available for the user .............................................................................36
Serial communication.....................................................................................37
Probes characteristics ....................................................................................38
INVERTER ................................................................................................39
Operating setting procedure................................................................................39
Alarm .................................................................................................39
START UP ................................................................................................42
Start up................................................................................................42
Preliminary operation .....................................................................................42
SAFETY AND MAINTENANCE................................................................................43
Basic safety rules........................................................................................43
General recommendations about the R410A refrigerant used......................................................44
General Rules for Maintanance .............................................................................46
Routine maintenance .....................................................................................46

4
GENERAL FEATURES
Declaration of conformity
Unit dataplate
The figure shows the fields reported on the unit dataplate :
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
Codice
Code B1 Rev
Ferroli Spa
Via Ritonda 78/A
(VR) Italy
A- Trademark
B- Model
B1 - Code
C- Serial number
D- Capacity in cooling
E- Capacity in heating (heat pump)
F- Power input in cooling
G- Power input in heating (heat pump)
H- Reference standard
I- Power supply
L- Maximum absorbed current
M- Refrigerant type and charge weight
N- Weight empty unit
O- Sound pressure level at 1 metre
P- IP protection level
Q- Maximum pressure - high pressure side
R- Maximum pressure - low pressure side
S- PED certification body
General specifications
• 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.
CONTAINS FLUORINATED GREENHOUSE GASES COVERED BY THE KYOTO PROTOCOL:
- R410A (GLOBAL WARMING POTENTIAL GWP = 2088)

5
IP 26.1 VB AB 0M5
GENERAL FEATURES
Unit description
This series of air-water chillers and heat pumps satises the co-
oling and heating requirements of residential plants of small and
medium size.
All the units are suitable for outdoor installation and can be ap-
plied to fan coil plants, radiant oor plants and high efciency
radiators plants.
The refrigerant circuit, contained in a compartment protected
from the air ow to simplify the maintenance operations, is
equipped with scroll compressor mounted on damper supports,
brazed plate heat exchanger, thermostatic expansion valve, re-
verse cycle valve, axial fans with safety protection grilles, nned
coil made of copper pipes and aluminium louvered ns. The cir-
cuit is protected by high and low pressure switches and differen-
tial pressure switch on the plate heat exchanger.
The plate heat exchanger and all the hydraulic pipes are ther-
mally insulated in order to avoid condensate generation and to
reduce thermal losses.
All the units can be equipped with variable speed fans control
that allows the units to operate with low outdoor temperatures in
cooling and high outdoor temperature in heating and permits to
reduce noise emissions in such operating conditions.
The low noise acoustic setting up (AS) is obtained, starting from
the base setting up (AB), reducing the rotational speed of the
fans and mounting sound jackets on the compressors.
All the units are supplied with an outdoor temperature sensor, al-
ready installed on the unit, in order to realize the climatic control.
All the units are provided with a phase presence and correct
sequence controller device.
All the units are accurately built and individually tested in the
factory. Only electric and hydraulic connections are required for
installation.
Unit identification code
The codes that identify the units and the meaning of the letters used are described below.
Unit type
IR - Unit suitable for hydronic plant in-
stallation operating as chiller
IP - Unit suitable for hydronic plant in-
stallation operating as reversible heat
pump
BR - Unit suitable for hydronic plant in-
stallation with brine solutions operating
as chiller
BP - Unit suitable for hydronic plant in-
stallation with brine solutions operating
as reversible heat pump
Power supply
5 - 400 V - 3N - 50 Hz
Operating range
M - Medium temperature.
The unit is suitable to be instal-
led in temperate climates.
Refrigerant type
0 - R410A
Acoustic setting up
AB - Base setting up
AS - Low noise setting up
Unit version
VB - Base version
VP - Pump version
VA - Tank version
N° compressors
Unit model
RMA2HE

6
GENERAL FEATURES
Description of components
External structure. Basement, supporting structure and lateral
panels are made of galvanized and painted sheet-steel (colour
RAL 7035) to guarantee good resistance to atmospheric agents.
Accessibility to internal parts is possible removing the frontal
panel. For extraordinary manteinances also the rear panel can
be removed.
Refrigerant circuit. It is contained inside a compartment
separated from the air flow to simplify maintenance and control
operations.
The hermetic scroll compressor (1) is mounted on damper
supports and is protected against overtemperatures and
overcurrents. It is equipped with an electrcal heater, that is
activated when the compressor turns off, to keep the compressor
crankcase oil temperature high enough to prevent migration of
the refrigerant during winter stops and to evaporate any liquid
present in the crankcase, in order to prevent possible liquid
rushes on starting (only heat pump units, accessory for cooling
only units).
The plant side heat exchanger (2) is a brazed stainless steel
plate heat exchanger, properly insulated to avoid condensate
generation and to minimize thermal losses, and protected by a
differential pressure switch that detects whatever water flow lack.
It is moreover protected against freeze danger by an antifreeze
electrical heater.
The source side heat exchanger (3) is a finned coil realized with
grooved copper pipes and aluminium fins with notched profile to
increase the heat exchange coefficient. A tray is obtained in the
basement to collect the condensate generated in heating mode.
The expansion device (4), a thermostatic expansion valve with
external equalizer, allows the unit to adjust itself to the different
operating conditions keeping steady the set superheating.
The refrigerant circuit of each unit contains moreover solid
core hermetic filter dryer (5) to restrain impurity and moisture
residuals that could be present in the circuit, high and low
pressure switches in order to assure the compressor to
operate inside the permitted limits, 4 way reverse cycle valve
(6) to allow operating mode change reversing the refrigerant flow
(only heat pump models), liquid receiver (7) to compensate the
different refrigerant charge required in heating and in cooling
mode (only heat pump models) and pressure connections
SAE 5/16” - UNF 1/2” - 20 equipped with pin, gasket and
blind nut, as required for the use of R410A refrigerant (they
allow the complete check of the refrigerant circuit: compressor
inlet pressure, compressor outlet pressure and thermostatic
expansion valve upstream pressure).
The axial fans (8) are contained in a sheet nozzle and are
equipped with a safety grille. The fans rotational speed can
be modulated continuosly by an inverter (option) to control the
condensation pressure (in cooling) and the evaporation pressure
(in heating) in order to extend the operating limits of the unit and
to reduce noise emissions.
Hydraulic circuit. All the pipes are thermally insulated to avoid
condensate generation and minimize thermal losses. The circuit
can be equipped with different kind of circulation pump (option).
In that case the circuit is also equipped with expansion vessel
and air vents. It is also possible to integrate inside the unit a buffer
tank arranged as buffer on the flow towards the plant (option). In
that case the circuit is equipped not only with expansion vessel
and air vents, but also with safety valve, automatic air vent and
drain cock.
Electrical panel. It contains all the power, control and security
components necessary to guarantee the unit to work properly.
The unit is managed by a microprocessor controller to which all
the electrical loads and the control devices are connected. The
user interface, placed on the frontal panel, allows to view and to
modify, if necessary, all the parameters of the unit.
All the units are supplied with an outdoor temperature sensor,
already installed on the unit, in order to realize the climatic
control.
DESCRIZIONE 2
DESCRIZIONE 1
3
7
2
6
4
5
1
8
DESCRIZIONE 2
DESCRIZIONE 1
3
7
2
6
4
5
1
8

7
GENERAL FEATURES
Control system
The unit is managed by a microprocessor controller to which,
through a wiring board, all the electrical loads and the control
devices are connected. The user interface is realized by a
display and four buttons that allow to view and, if necessary,
modify all the operating parameters of the unit. It's available, as
an accessory, a remote control that reports all the functionalities
of the user interface placed on the unit.
The main functions available are :
- water temperature management (through set point
adjustment)
- adaptive function
- climatic control in heating and in cooling mode (automatic set
point adjustment according to outdoor air temperature)
- dynamic defrost cycle management according to outdoor air
temperature
- alarm memory management and diagnostic
- fans management by means of continuous rotational speed
control
- pump management
- integrative electrical heaters management in heating mode
(2 step logic)
- compressor and pump operating hours recording
- serial communication through Modbus protocol
- remote stand by
- remote cooling-heating
- general alarm digital output
Versions
Each model can be supplied in three different versions to satisfy the application requirements of the plants. The unit is always
supplied assembled, wired and factory tested.
The version is automatically identified by the option "Storing and pumping module" selected.
Base Version - VB
The unit does not contain neither
circulating pump nor tank. Therefore
a proper water flow through the plate
heat exchanger must be guaranteed to
prevent internal safety devices activation.
In any case the pump, if properly sized,
can be connected to the electrical panel
of the unit and managed by the controller
of the unit.
Pump Version - VP
The unit contains a circulating pump, air
vents, expansion vessel and drain cock.
Tank Version - VA
The unit contains a tank (arranged as
buffer on the flow towards the plant),
safety valve, circulating pump, air vents,
expansion vessel and drain cock.
The tank is also arranged for the
installation of antifreeze or integrative
electrical heaters.
°C
1212
mode
disp
vb VP
VA
vb VP
VA
vb VP
VA

8
ACCESSORIES AND OPTIONAL EQUIPMENT
Options
Storing
and pumping
module
Standard pump Allows the circulation of the water on the plant side.
High head pump Allows the circulation of the water on the plant side and guarantees a higher avai-
lable static head, suitable for high pressure drop plants.
Modulating pump
Allows the circulation of the water on the plant side with the possibility to set the
rotational speed of the pump in order to get the requested flow rate without the
necessity to install other setting devices.
Tank and
standard pump
Allows the circulation of the water on the plant side.
The thermal inertia of the buffer tank allows to reduce the number of compressor
starts and to guarantee a more stable flow temperature.
Tank and
high head pump
Allows the circulation of the water on the plant side and guarantees a higher avai-
lable static head, suitable for high pressure drop plants.
The thermal inertia of the buffer tank allows to reduce the number of compressor
starts and to guarantee a more stable flow temperature.
Tank and
modulating pump
Allows the circulation of the water on the plant side with the possibility to set the
rotational speed of the pump in order to get the requested flow rate without the
necessity to install other setting devices.
The thermal inertia of the buffer tank allows to reduce the number of compressor
starts and to guarantee a more stable flow temperature.
Electrical
heaters
Antifreeze
Activated together with the antifreeze electrical heater of the plate heat exchanger,
it has the task to keep the water in the buffer tank at a temperature high enough to
avoid ice generation during winter.
Integrative
Integrate or replace the heating power supplied by the heat pump and are managed
by the unit controller with a 2 step logic.
They are also activated as antifreeze electrical heaters.
Available only for the VA version.
Soft starter Reduces the compressor start current.
Compressor power factor correction Allows to reduce the phase shift between the absorbed current and the power sup-
ply voltage keeping it above the value of 0,9.
Fans control
Modulating control
(condensation / evaporation
control)
The fans rotational speed can be modulated continuosly by an inverter to control
the condensation pressure (in cooling) and the evaporation pressure (in heating)
in order to extend the operating limits of the unit and to reduce noise emissions.
Electrical loads
protection
Fuses Allows to protect the electrical loads with fuses.
Thermal magnetic
circuit breakers
Allows to protect the electrical loads with thermal magnetic circuit breakers simpli-
fying the maintenance operations.
Hydraulic scheme
VB unit VA unit
VP unit ITEM DESCRIPTION
PPUMP
PD DIFFERENTIAL PRESSURE WATER
SSTORAGE TANK
SA WATER DRAIN VALVE
SF VALVOLASFIATO AIR
SIW PROBE WATER INLET
SP HEAT EXCHANGER
SUW PROBE WATER OUTLET
VE EXPANSION TANK
VS SAFETY VALVE
EV
TUO
P
S
SUW
SIW
SUW
SIW
VB VA VP
NI
PD
TUO
PS
FS
AS
S
SV
NI
PD
P
EV
SUW
SIW
TUO
PS
NI
PD
P
EV
TUO
PS
SUW
SIW
SUW
SIW
VB VA VP
NI
PD
TUO
PS
FS
AS
S
SV
NI
PD
P
EV
SUW
SIW
TUO
PS
NI
PD
P
EV
TUO
PS
SUW
SIW
SUW
SIW
VB VA VP
NI
PD
TUO
PS
FS
AS
S
SV
NI
PD
P
EV
SUW
SIW
TUO
PS
NI
PD
P

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ACCESSORIES AND OPTIONAL EQUIPMENT
Rubber vibration dampers Allow to reduce the transmission to the unit support plane of the mechanical vibrations generated by the compressor
and by the fans in their normal operating mode.
Coil protection grille Protects the external surface of the finned coil..
Remote control It is suitable for wall mounting and reports all the control and visualization functions available on the user interface
placed on the unit. It therefore allows the complete remote control of the unit.
Modbus serial interface
on RS485
It allows to communicate with the unit controller and to view the operating conditions of the unit through Modbus
communication protocol. The RS485 serial line ensures the signal quality up to distances of about 1200 meters (that
can be extended by means of proper repeaters).
Programmer clock It allows the unit to be turned on and off according to a set program, through the digital input available on the unit
wiring board (remote stand by).
Phase sequence and
voltage controller
It checks not only the presence and correct order of the power supply phases but also the voltage level on each
phase and avoid the unit to operate with voltage levels outside the permitted limits.
Water flow switch Allows to detect the water flow lack through the plate heat exchanger and operates as an integration of the protecion
offered by the differential pressure switch (standard).
Coil protection grille Protects the external surface of the finned coil..
Coils protection kit
(for transport) It is a sheet of polystyrene which increases protection of the finned coil during transport.
Casing Kits protection
(for transport) Consisting of 4 profiles cardboard that increase the protection of the casing of the unit during transport.
Modbus serial interface
on RS485
It allows to communicate with the unit controller and to view the operating conditions of the unit through Modbus
communication protocol. The RS485 serial line ensures the signal quality up to distances of about 1200 meters (that
can be extended by means of proper repeaters).
Phase sequence and
voltage controller
It checks not only the presence and correct order of the power supply phases but also the voltage level on each
phase and avoid the unit to operate with voltage levels outside the permitted limits.
High and low
pressure gauges 2 pressure gauges allow visualization of high and low refrigerant gas pressure.
Pressure transducer* It consists of a transducer, which allows operation of the control condensation, evaporation and defrost by reading
the pressure.
Crankcase heaters
compressor oil (standard for IP and BP units, ccessory IR and BR units ) consist of electrical heaters heating oil compressors.
Accessories
Supplied accessories
Factory mounted accessories
NOTES
* This accessory can be selected only for units with modulating fan control.

10
TECHNICAL DATA AND PERFORMANCE - BASE VERSION (VB)
Frame 1 2
Model 19.1 22.1 26.1 30.1 35.1 40.1 U.M.
Power supply 400 - 3N - 50 400 - 3N - 50 400 - 3N - 50 400 - 3N - 50 400 - 3N - 50 400 - 3N - 50 V-ph-Hz
Technical data
Refrigerant
Type R410A R410A R410A R410A R410A R410A -
Compressor
Type scroll scroll scroll scroll scroll scroll -
Quantity 1 1 1 1 1 1 n°
Power steps 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 %
Plant side heat exchanger
Type stainless steel
brazed plates
stainless steel
brazed plates
stainless steel
brazed plates
stainless steel
brazed plates
stainless steel
brazed plates
stainless steel
brazed plates -
Quantity 1 1 1 1 1 1 n°
Source side heat exchanger
Type finned
coil
finned
coil
finned
coil
finned
coil
finned
coil
finned
coil -
Quantity 1 1 1 1 1 1 n°
Fans
Type axial axial axial axial axial axial -
Quantity 1 1 1 1 1 1 n°
Diameter 630 630 630 800 800 800 mm
Maximum rotational speed 900 900 900 900 900 900 rpm
Total installed power 0,6 0,6 0,6 1,8 1,8 1,8 kW
Plant side hydraulic circuit
Expansion vessel volume VP - VA 10 10 10 10 10 10 l
Tank volume - VA 85 85 85 85 85 85 l
Safety valve set * - VP - VA 3 3 3 3 3 3 bar
Standard pump (option)
Type centrifugal
pump
centrifugal
pump
centrifugal
pump
centrifugal
pump
centrifugal
pump
centrifugal
pump -
Installed power 0,6 0,6 0,6 0,8 0,8 0,8 kW
High head pump (option)
Type centrifugal
pump
centrifugal
pump
centrifugal
pump
centrifugal
pump
centrifugal
pump
centrifugal
pump -
Installed power 0,9 0,9 0,9 1,6 1,6 1,6 kW
Modulating pump (option)
Type centrifugal pump
with inverter
centrifugal pump
with inverter
centrifugal pump
with inverter
centrifugal pump
with inverter
centrifugal pump
with inverter
centrifugal pump
with inverter -
Installed power 0,6 0,6 0,6 0,8 0,8 0,8 kW
Integrative electrical heaters in the tank (option)
Installed power 6,6 6,6 6,6 6,6 6,6 6,6 kW
Power steps 2 2 2 2 2 2 n°
NOTES
*: Standard version for VA, to be installed by the customer for VP version.