Vortice RXC/Hi Series User manual

www.vorticeindustrial.com
[email protected]
Installaon Operaons and Maintenance manual
RXC/Hi series
Incorporated in this manual there are the following documents:
Declaraon of conformity •
Technical schedule •
Dimensional drawing •
Wiring diagrams •
ENGLISH
Original Instrucons
RETAIN FOR FUTURE REFERENCE

02
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
Dear customer,
We thank you for purchasing a VORTICE INDUSTRIAL product,
manufactured with rst choice materials and advanced technologies.
The quality level is under constant control, and VORTICE INDUSTRIAL products
are therefore synonymous with Safety, Quality and Reliability.
Vorce Industrial srl
The Company have the right to introduce at any me whatever modicaons necessary to the improvement of the product.
Read and understand
the instructions before
undertaking any work on
the unit
Multiple instructions:
Consult the specic part

FAC-SIMILE
03
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
Reproducon, data storage and transmission, even paral, of this publicaon, in any form, without the prior wrien authori-
saon of Vorce Industrial S.r.l., is prohibited. Vorce Industrial S.r.l. can be contacted for all inquiries regarding the use of its
products.
Vorce Industrial S.r.l. follows a policy of connuous product development and improvement and reserves the right to modify
specicaons, equipment and instrucons regarding use and maintenance at any me, without noce.
Declaraon of conformity (FAC-SIMILE)
We declare under our own responsibility that the units and the equipment complies in all parts with the CEE and EN direcves.
The CE declaraon of conformity is enclosed to the technical schedule enclosed with the unit.
This units has been designed in accordance with the following EU Direcves:
• Direcve 2006/42/CE of the European Parliament and of the Council of May 17th, 2006 on machinery;
• Direcve 2014/35/CE Low Voltage by achievement of the following technical standards:
EN 60335-2-40:2003 + A11:2004 + A12:2005 + A1:2006 + EC:2006 + A2:2009 + A13:2012 + A13/EC:2013, EN 60335-1:2002
+ A11:2004 + A1:2004 + A12:2006 + A2:2006+ A1/EC:2007 + A13:2008 + EC:2009 + EC:2010 + A14:2010 + A15:2011;
• Direcve EMC 2014/30/UE of the European Parliament and of the Council of February 26th, 2014 on the harmonisaon
of the laws of the Member States relang to electromagnec compability (recast), by achievement of the following
technical standards: EN 60335- 1:2012, EN 55014-1:2006 + A1:2009 + A2:2011, EN 61000-3-2:2006 + A1:2009 + A2:2009,
EN 61000-3-3:2013, EN 55014-2:1997 + A1:2001 + A2:2008;
• Direcve RoHS 2011/65/UE;
• Direcve 2010/30/UE relang to energy labelling;
• Direcve 2009/125/UE with implemenng regulaon D. Lgs. n. 15 of February 16th, 2011 and the following harmonised
standard: EN 60204-1:2018
The unit is equipped with a series of prevenon and safety devices described in detail in the accompanying
documentaon. The installer is required to connect and acvate all these mounted components, checking their
funconality.
The system or machine into which this unit is to be incorporated must also comply with the above menoned
Direcves. The user, or whoever subsequently operates the system, must periodically check the funconality
and eciency of the safety devices.
The non-acvaon, removal or inhibion of the acve safety systems, as well as the removal of the passive
safety systems, exempt Vorce Industrial s.r.l. from any responsibility regarding any accident or damage, direct
or indirect, to people and/or things, aributable to the machine.
The manual supplied with the unit is completed by a TECHNICAL DATA SHEET, with the fundamental construc-
ve and funconal data, and by the relave DRAWINGS.
Transport, handling, installaon and subsequent operaon must be carried out in full compliance with the
above prescripons, in the subsequent indicaons of the manual and the accompanying documentaon.
.............................................................
Corporate Technical Management
Zecchin Maurizio
Service provided by Vorce Industrial s.r.l.
e-mail: info@vorceindustrial.com

04
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
GENERAL INDEX
1. INTRODUCTION .................................................................................................................................................................... 06
1.1 General informaon ........................................................................................................................................ 06
1.2 Purpose and Content of the Instrucons ........................................................................................................ 06
1.3 Storage of instrucons .................................................................................................................................... 06
1.4 Instrucons update ......................................................................................................................................... 06
1.5 How to use these instrucons ........................................................................................................................ 06
1.6 Residual Risks .................................................................................................................................................. 07
1.7 General Safety Symbols ................................................................................................................................... 09
1.8 Safety Symbols ................................................................................................................................................. 10
1.9 Limits of use and prohibited uses ................................................................................................................... 11
1.10 Unit idencaon .......................................................................................................................................... 11
2. TECHNICAL CHARACTERISTICS ............................................................................................................................................ 12
2.1 Introducon ..................................................................................................................................................... 12
2.2 Structure .......................................................................................................................................................... 12
2.3 Air lters .......................................................................................................................................................... 12
2.4 Heat recovery (1° recovery stage) ................................................................................................................... 12
2.5 Refrigerant circuit in heat pump (2° recovery stage) ...................................................................................... 12
2.6 Electric box ..................................................................................................................................................... 13
2.7 Control system ................................................................................................................................................. 13
2.8 Fans .................................................................................................................................................................. 13
2.9 Addional coils (external module) .................................................................................................................. 13
2.10 Test ................................................................................................................................................................ 13
2.11 Packing ........................................................................................................................................................... 13
3. CONFIGURATIONS ................................................................................................................................................................ 14
4. MAIN COMPONENTS OF THE UNIT ..................................................................................................................................... 15
5. AVAILABLE ACCESSORIES ..................................................................................................................................................... 16
6. OPERATING MODE ............................................................................................................................................................... 18
6.1 Winter operang mode ................................................................................................................................... 18
6.2 Summer operang mode ................................................................................................................................ 18
6.3 Free-Cooling operang mode ......................................................................................................................... 18
7. TECHNICAL DATA ................................................................................................................................................................. 19
8. VENTILATION CURVES ......................................................................................................................................................... 20
9. OPERATING LIMITS .............................................................................................................................................................. 22
10. SOUND DATA ...................................................................................................................................................................... 23
10.1 Noise levels .................................................................................................................................................... 23
10.2 Sound aenuators reducon ........................................................................................................................ 23
11. SAFETY AND CONTROL DEVICES ....................................................................................................................................... 24
12. INSTALLATION ................................................................................................................................................................... 25
12.1 Receipt and inspecon .................................................................................................................................. 26
12.2 Storage ........................................................................................................................................................... 26
12.3 Unpacking ...................................................................................................................................................... 26
12.4 Liing and Handling ...................................................................................................................................... 27
12.5 Posioning and minimum technical spaces .................................................................................................. 27
12.6 Connecng addional secons: Water coils ................................................................................................. 28
12.7 Connecng addional secons: Sound aenuators ..................................................................................... 28
12.8 Condensate drain connecon ....................................................................................................................... 29
12.9 Hydraulic connecon to the water coil ......................................................................................................... 29
12.10 How to vent the unit ................................................................................................................................... 30
12.11 Connecng the unit to air ducts ................................................................................................................. 30
13. RS485 SERIAL INTERFACE CARD........................................................................................................................................ 31
14. FILTERS and HEAT EXCHANGER extracon ....................................................................................................................... 31
15. REFRIGERANT DIAGRAM................................................................................................................................................... 32

05
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
16. ELECTRICAL CONNECTIONS .............................................................................................................................................. 33
16.1 Detail of electrical panel ............................................................................................................................... 33
16.2 Electrical data ................................................................................................................................................ 34
16.3 Power supply connecon .............................................................................................................................. 34
16.4 Terminal Block Connecons .......................................................................................................................... 35
16.5 Descripon of the remotable control panel ................................................................................................. 36
16.5.1 Posion of the control panel ...................................................................................................................... 36
16.5.2 Remote panel keys ..................................................................................................................................... 36
16.5.3 Dimensions ................................................................................................................................................. 37
16.5.4 Wall installaon .......................................................................................................................................... 37
16.5.5 Electrical connecon .................................................................................................................................. 38
17. STARTUP ............................................................................................................................................................................ 39
17.1 Preliminary checks ........................................................................................................................................ 39
17.2 Checks during the operaon ......................................................................................................................... 40
18. UNIT USE ........................................................................................................................................................................... 41
18.1 Funcon of display icons ............................................................................................................................... 41
18.2 Factory default sengs ................................................................................................................................. 41
18.3 Switching on and parameters seng ........................................................................................................... 42
19. DIAGNOSIS AND TROUBLESHOOTING .............................................................................................................................. 46
19.1 Troubleshoong ............................................................................................................................................ 46
20. DIMENSIONAL DRAWINGS................................................................................................................................................ 47
21. UNIT MAINTENANCE ........................................................................................................................................................ 48
21.1 General warnings .......................................................................................................................................... 48
21.2 Access to the unit .......................................................................................................................................... 48
21.3 Periodical checks ........................................................................................................................................... 49
21.4 Refrigeraon circuit repair ............................................................................................................................ 49
22. DECOMMISSIONING ......................................................................................................................................................... 50
22.1 Disconnecng the unit .................................................................................................................................. 50
22.2 Decommissioning, disposal and recycling .................................................................................................... 50
22.3 RAEE Direcve (EU only) ............................................................................................................................... 50

06
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
1. INTRODUCTION
Units must be installed and operated according to the instrucons in this manual. Strict adherence to these simple instrucons
is a prerequisite to:
• eliminate or reduce shutdown me due to unexpected failures;
• improve the performance of components, resulng in energy savings;
• increase the life of components and the enre unit;
• decrease maintenance costs.
1.1 General informaon
This manual has been prepared to allow correct installaon, set-up and maintenance of the unit. Any contractual or extra-con-
tractual responsibility of the Company for damage caused to persons, animals or things, due to installaon, adjustment and
maintenance errors or improper use, is excluded. Any use other than that specied does not imply for the manufacturer any
commitment or obligaon of any kind.
This documentaon is an informave support and cannot be considered as a contract towards third pares.
The Company implements a policy of constant improvement and development of its products. It therefore reserves the right
to make changes to specicaons, ngs and documentaon at any me, without prior noce and without any obligaon to
update what has already been delivered.
1.2 Purpose and Content of the Instrucons
These instrucons provide essenal informaon for the installaon, operaon, tesng and maintenance of the machine. They
have been drawn up in accordance with the legal provisions issued by the European Union and the technical standards in force
at the me the instrucons were issued.
The local safety regulaons in force at the me of installaon must be observed.
The instrucons contain instrucons for avoiding reasonably foreseeable misuse.
1.3 Storage of instrucons
This manual and the eventual wiring diagram of the unit must be carefully stored in a suitable place, protected from dust and
humidity and easily accessible to users and operators for any further consultaon.
The instrucons must always follow the unit throughout its enre life cycle and must therefore be passed on to any subse-
quent user.
1.4 Instrucons update
It is recommended to check that the instrucons are up to date with the latest revision available.
Any updates sent to the customer should be retained as an aachment to this manual.
The Company is available to provide any informaon regarding the use of its products.
1.5 How to use these instrucons
The instrucons are an integral part of the unit.
It is compulsory for users or operators to consult the instrucons before any operaon on the unit and on any
occasion of uncertainty regarding the transport, handling, installaon, maintenance, use and dismantling of the
unit.
In these instrucons, in order to draw the aenon of operators and users to the operaons to be carried out in
safety, graphic symbols have been included that are shown in the following paragraphs.

07
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
1.6 Residual Risks
A residual risk is any hazard that cannot be fully reduced by design and protecve techniques, or a potenal hazard that is not
obvious.
ATTENTION
This manual indicates any operaon that may generate a hazardous situaon as well as the precauonary
measures to be observed in each case.
• All units have pictograms with hazard warnings.
• The units are safe machines, provided the safety guards are not tampered with or removed.
• Technical preparaon, observance of the procedures outlined in this manual, and markings at crical points on the unit
will sll allow safe operaon.
• The following safety rules must be observed during installaon, start-up, use and maintenance of the units:
• Do not operate the unit unless it and its electrical components have been connected to the earthing system;
• Do not operate unit unless fan is connected to a duct or protected with safety mesh;
• Do not use the unit as a stand for other machinery;
• Do not use unit as a walkway;
• Do not use unit as equipment storage;
• Do not open inspecon panels while fan is running, especially in over pressure secons;
• Do not leave inspecon panels parally closed; Make sure all handles or knobs are securely closed;
• Wear personal protecve equipment before working on the unit;
• Before accessing the unit, make sure that all electrical ulies have been turned o, especially before
opening the inspecon panels, make sure that the fan is o and cannot be turned on again without the
knowledge of the person working on the unit;
• Before starng the fan, always ret the protecon cover or the closing panel of the fan secon;
• Be careful when liing the unit as its center of gravity may be severely unbalanced;
• Be careful when locking the liing ropes/hooks;
• Be careful of sheet metal edges inside the unit;
• Be careful of sheet metal edges outside the unit;
• Be aware of possible burns from heang coils;
• Be aware of dampers that may close unexpectedly.

08
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
Whilst the unit has been designed to minimize any risk posed to the safety of people who will interact with it.
It has not been technically possible to eliminate completely the causes of risk. It is therefore necessary to refer to the require-
ments and symbolism below.
LOCATION OF
RISK
(if present)
RESIDUAL RISK METHOD OF INJURY PRECAUTIONS AND
PROTECTIONS
Mixing box with
dampers and
actuators
Crush Contact Remove voltage before any operaon
Thermal heat
exchangers
Small stab wounds,
burns Contact Avoid any contact, use protecve gloves
Electric heaters Electrocuon,
severe burns
Contact, Fire due to short
circuit or overheang of
the heang elements
Periodic check of the safety devices, adhe-
sive warning signs on the machine
Heat
exchangers
Small stab wounds,
crush Contact Avoid any contact, use protecve gloves
Fans Cuts, eye damage,
broken bones
Inseron of objects
through the fans are
operang
Never put objects through the fans sec-
ons
External to unit:
unit enclosure
Intoxicaon,
severe burns
Fire due to short circuit
or overheang of the sup-
ply cable external to unit
Size cables and mains protecon system in
accordance with standards regulaons
Inside the unit:
compressors and
gas supply pipes
Severe burns Contact Avoid any contact,
use protecve gloves
Internal com-
ponent: electric
cables and
metallic parts
Electrocuon,
severe burns
Defect in the supply cable
insulaon, live metallic
parts
Adequate protecon of power cables, en-
sure correct earthing of all metal parts
Low pressure
safety valves
Intoxicaon,
severe burns
Elevate evaporang
pressure not suitable for
correct operaon of the
unit during the
maintenance operaons
Carefully check the evaporang pressure
during the maintenance operaons
High pressure
safety valves
Intoxicaon,
severe burns,
hearing loss
Intervenon of the high
pressure safety valve with
open refrigerant circuit
cabinet
Avoid, as much as possible, the opening
of the refrigerant circuit cabinet; carefully
check the condensing pressure value; use
all protecon devices as indicated by
zregulaons in force

09
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
1.7 General Safety Symbols
Individual safety symbols in accordance with ISO 3864-2:
PROHIBITION
A black symbol inserted in a red circle with a red diagonal indicates an acon that must not be performed.
WARNING
A black graphic symbol within a yellow triangle with black borders indicates a hazard.
MANDATORY ACTION
A white symbol inserted in a blue circle indicates an acon that must be performed to avoid a hazard.
Combined safety symbols in accordance with ISO 3864-2:
The graphic symbol “warning” is qualied with addional safety informaon (text or other symbols).

10
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
1.8 Safety Symbols
GENERAL DANGER
Strictly observe all indicaons placed beside the pictogram. Failure to observe the indicaons may lead to
situaons of risk with possible consequent damage to the health of the operator and the user in general.
ELECTRICAL HAZARD
Observe all signs placed next to the pictogram. The symbol indicates components of the unit and acons de-
scribed in this manual that could create an electrical hazard.
MOVING PARTS
The symbol indicates those moving parts of the unit that could create risk.
SHARP SURFACES
The symbol indicates components or parts that could cause stab wounds.
HOT SURFACES
The symbol indicates components of the unit at elevate surface temperature which might create risk.
EARTH CONNECTION
The symbol idenes earthing connecon points in the unit.
READ AND UNDERSTAND THE INSTRUCTIONS
Read and understand the instrucons of the machine before any operaons.
RECOVER OR RECYCLE MATERIAL

11
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
Fam. / Type
Serial Number
Power Supply
Refrigerant type
Wiring diagram n°
Refrigerant Charge:
Circuit 1
CO2 eq.
LOW PRESSURE SIDE
Working Pressure
Working Temperature
Min Design Temperature
Max Design Temperature
Year Build
Operating Weight
Max. Current Input
Auxiliary voltage
Motor Power Input:
Supply Fan
Return Fan
Compr. Circ. 1
HIGH PRESSURE SIDE
Working Pressure
Max Design Pressure
Min Design Temperature
Max Design Temperature
Safety Pressure
“Hermetically sealed equipment. It contains fluorinated greenhouse gases covered by the Kyoto protocol”
VORTICE INDUSTRIAL S.r.l. - via B. Brugnoli, 3 - 37063 Isola della Scala - Verona (Italy) Tel. [phone] - www.vorticeindustrial.com
Fabbricato in Italia - MADE IN ITALY
kg
A
kW
kW
kW
bar
bar
°C
°C
bar
kg
t eq
bar
°C
°C
°C
(V/Hz/ph)
GWP
0426
CAPTION:
(1) Unit model and size
(2) Serial number
(3) Power supply characteriscs
(4) Type of refrigerant
(5) Wiring diagram number
(6) Manufactured year
(7) Overall unit weight
(8) Max. electric current consumpon
(9) Auxiliary voltage
(10) Refrigerant content in the circuit 1
(11) CO2 equivalents
(12) Electric power input on supply fan
(13) Electric power input on exhaust fan
(14) Electric power input on circuit 1 compressor
(15) Working pressure (low pressure side)
(16) Working temperature (low pressure side)
(17) Min design temperature (low pressure side)
(18) Max design temperature (low pressure side)
(19) Working pressure (high pressure side)
(20) Max design pressure (high pressure side)
(21) Min design temperature (high pressure side)
(22) Max design temp. (gas) (high pressure side)
(23) Max design temp. (liquid) (high pressure side)
(24) Safety pressure (high pressure side)
In all dealings with the Company it's essenal to quote the
model and serial number indicated on this plate (ref. 1 and 2).
1
2
3
4
6
7
11
8
5
9
12
13
14
15
16
17
18
19
20
21
22
23
24
10
1.9 Limits of use and prohibited uses
The machine has been designed and built exclusively for the uses described in the technical manual.
Any other use is prohibited as it could generate health risks for the operators and users.
However, the unit is not suitable for operaon in environments:
• where vibraons are present;
• where electromagnec elds are present;
• where aggressive atmospheres are present.
THIS UNIT IS NOT SUITABLE FOR OPERATION IN EXPLOSIVE ATMOSPHERE.
1.10 Unit idencaon
Each unit has a label aached to the outside of the unit, which shows the idencaon data of the machine together with the
main technical characteriscs.
For electrical informaon not included on the label, refer to the electrical diagram.
Check that the characteriscs of the electrical network comply with the data on the idencaon plate.
The idencaon label must never be removed from the unit.

12
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
2. TECHNICAL CHARACTERISTICS
2.1 Introducon
Any occupied room requires the correct supply of fresh air and at the same time the control of the internal thermo-hygrometric
conditions. Through the recovery of energy from the air extracted from the room, through the use of systems with integrated
heat pump technology, we offer a highly efficient solution to meet the needs of thermo-hygrometric well-being and air
exchange in civil and tertiary air conditioning systems such as offices, bars, restaurants, etc., both in summer and winter and
without additional charges in the management of primary air.
These units are particularly efficient since they use a high efficiency plate heat recovery, combined with a cooling circuit
in heat pump operating with inverter compressor. The use of the high-efficiency plate heat recovery makes it possible to
significantly reduce the period of use of the cooling circuit during the year, thus reducing its use to short periods, thus limiting
electricity consumption to a minimum.
The compact dimensions of the units allow for easy installation even in false ceilings while maintaining excellent accessibi-lity
for the maintenance of all internal components. The numerous accessories available on request complete the functions of
the unit, which generally has to be combined with an air conditioning system.
The units are available in 5 sizes, with nominal air flow rates from 500 to 3500 m3/h.
The units in H1, H2, H3, H4 configurations have been designed for false ceiling installation.
2.2 Structure
Structure in RAL 9010 steel proles, pre-painted at 180°C with polyurethane powder paint and 25 mm thick panels.
Sheets with 6/10" thickness covered with protecve lm, in galvanized steel.
The internal insulaon is made of high density polyurethane foam (40 kg/m3) or mineral wool (90 kg/m3). The frame is made
according to EN1886 standard, class D1 mechanical resistance, class T3 thermal transmiance, air ghtness class L1, thermal
break factor TB3.
The air ghtness is guaranteed by a parcularly adaptable and resilient neoprene gasket, the ghtening of the opening panels
is made by means of push screws that ensure an adequate and constant pressure on the gaskets.
In all areas subject to condensaon there is a condensaon tray in AISI 304 stainless steel, inclined internally and in
compliance with EN 1.4301.
2.3 Heat recovery (1° recovery stage)
The units are equipped with an aluminium counter-ow heat exchanger used to transfer heat from the exhaust air to the
incoming fresh air. The heat exchange takes place in counter-ow with eciencies higher than 85%. The spacing between
the ns is opmized in order to reduce air side pressure drop and fan power consumpon. In some condions of low fresh
air temperature and high humidity, the exchanger may start to frost. Through the integrated control system it is possible
to manage the defrosng of the exchanger. The heat recovery is also equipped with an addional by-pass damper for the
management of the free-cooling and free-heang mode.
2.4 Refrigerant circuit in heat pump (2° recovery stage)
The eciency of the unit is further increased thanks to a second phase of indirect recovery, obtained through a heat pump
refrigeraon circuit compression system. The cooling circuit is equipped with a rotary or Scroll compressor with inverter,
with connuous capacity regulaon. The compressor is complete with thermal protecon, crankcase heater, low and high
pressure switches and vibraon isolators suitable to isolate vibraons.
The refrigerant circuit is of direct expansion type loaded with R32 refrigerant. Each refrigerant circuit is factory tested both
in terms of ghtness (pressure test) and funconality. The main components are: nned pack heat exchangers and source,
electronic expansion devices, solid-cartridge an- acid lters, safety pressure switches on high and low refrigerant pressure
side, receiver and liquid separator on sucon side, liquid / humidity sight glass, cycle reversal valve, non-return valves, safety
valves on high pressure side. The circuit is complete with reverse cycle defrosng system and a fresh air by-pass.

13
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
2.5 Electric box
The electric box is manufactured according to IEC 204-I / EN 60204-I standards and complete with door block disconnector,
CE insulaon transformer. All motors and auxiliary circuits are protected against overload and short circuits by fuses
and/or circuit breakers. The electrical panel also includes the following components: General alarm contact, remote control
ON/OFF, summer/winter seasonal changeover contact, outdoor air temperature probe, supply air temperature probe, return
air temperature probe, recirculaon air probe, defrost recovery probe, source exchanger defrost probe, pressure switches
for supply and return dirty lters.
2.6 Control system
The unit is complete with adjustment by means of a microprocessor electronic board with dedicated soware and external
LCD display as user interface. Through the external or remote LCD display it is possible to set all the working set-points of the
unit and to visualize the operang states and possible alarm condions present. Through the values acquired by the room
and air supply temperature probe, temperature control will be managed by acvang the compressors with reference to the
winter and summer set-points. The unit can manage the automac change of the room cooling or heang modes, the free-
cooling and free-heang condions through the comparison with the fresh air temperature.
The heat capacity delivered by the heat pump unit will be connuously modulated through the speed variaon of the inverter
refrigeraon compressor. This variable mainly depends on the value of the supply air temperature with reference to the
fresh air condions. This characterisc allows the operaon at paral loads with a much higher energy saving compared to a
tradional group equipped with ON/OFF compressors.
2.7 Fans
Independently controllable, they consist of aerodynamically balanced, stacally and dynamically balanced backward blade
centrifugal impellers with aerodynamic prole, made of galvanized steel. The impellers are directly coupled to brushless EC
brushless motors, with external rotor, operang via a 0-10V PWM or MODBUS-RTU modulang signal.
2.8 Addional coils (external module)
External module that can accommodate heang and/or cooling coils with a high number of rows. The module can also
accommodate combined coils (water cooling, water and / or electric heang).
2.9 Test
Units are fully assembled and wired at the factory and subjected to a complete funconal test before shipment. They are
manufactured in compliance with the safety standard of the Machinery Direcve 2006/42/EC, the Low Voltage Direcve
2006/95/EC, and the Electromagnec Compability Direcve 2004/108/EC and therefore complies with the "Health and
safety requirements" prescribed. Units are provided with CE markings, cercate of conformity, user and maintenance
manual.
2.10 Packing
Units are supplied on thick wooden pallets and wrapped in plasc lm to protect against impacts during transport and
handling on site.

14
H1
H2
H3
H4
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
3. CONFIGURATIONS
EXHAUST
EXHAUST
SUPPLY
RETURN
SUPPLY
RETURN
AIR INLET
FRESH
AIR INLET
FRESH
SUPPLY
RETURN
SUPPLY
RETURN
EXHAUST
EXHAUST
AIR INLET
FRESH
AIR INLET
FRESH

15
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
1
23
4
5
9
7
6
810
4. MAIN COMPONENTS OF THE UNIT
1Return air filter 7Electrical panel
2Counterow heat exchanger
8External box for hydronic coils
(1)
(heang / cooling)
3Backward blade fan, EC brushless motor with
external rotor (exhaust side)
4Fresh air inlet filter 9Refrigerant circuit in heat pump
5By-Pass damper on heat exchanger
6Backward blade fan, EC brushless motor with
external rotor (supply side) 10 LCD remote graphic display
(1) component supplied on request as an accessory

16
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
5. AVAILABLE ACCESSORIES
Return side ePM10 50% (G4) air pre-lter
Made of galvanized steel sheet frame and undulated lter media, 48mm thickness, in white synthec material, contained by
two welded galvanized nets. The lter media has a low pressure drop and it may be installed as pre-lter in combinaon with
the ePM10 60% (M5), ePM1 55% (F7) or ePM1 80% (F9) lters, located on the room air return side.
Supply side ePM10 50% (G4) air pre-lter
Made of galvanized steel sheet frame and undulated lter media, 48mm thickness, in white synthec material, contained by
two welded galvanized nets. The lter media has a low pressure drop and it may be installed as pre-lter in combinaon with
ePM1 55% (F7) or ePM1 80% (F9) lters, located on the room air supply side.
Return side ePM10 60% (M5) air lter
Built with a galvanized sheet metal frame and a 48 mm thick pleated ltering sieve, in white berglass, contained by two
welded galvanized nets. The lter media has an ePM10 60% (M5) ltering degree, according to ISO 16890 and has a large
ltering surface area that guarantees long operang life and less frequent replacements.
Supply side ePM10 60% (M5) air lter
Built with a galvanized sheet metal frame and a 48 mm thick pleated ltering sieve, in white berglass, contained by two
welded galvanized nets. The lter media has an ePM10 60% (M5) ltering degree, according to ISO 16890 and has a large
ltering surface area that guarantees long operang life and less frequent replacements.
Return side eMP1 55% (F7) air lter
Built with a galvanized sheet metal frame and a 48 mm thick pleated ltering sieve, in white berglass, contained by two
welded galvanized nets. The lter media has an ePM1 55% (F7) ltering degree, according to ISO 16890 and has a large
ltering surface area that guarantees long operang life and less frequent replacements.
Supply side eMP1 55% (F7) air lter
Built with a galvanized sheet metal frame and a 48 mm thick pleated ltering sieve, in white berglass, contained by two
welded galvanized nets. The lter media has an ePM1 55% (F7) ltering degree, according to ISO 16890 and has a large
ltering surface area that guarantees long operang life and less frequent replacements.
Return side eEPM1 80% (F9) air lter
Built with a galvanized sheet metal frame and a 48 mm thick pleated filtering sieve, in white fiberglass, contained by two welded
galvanized nets. The filter media has an ePM1 80% (F9) filtering degree, according to ISO 16890 and has a large filtering surface area
that guarantees long operating life and less frequent replacements.
Supply side eEPM1 80% (F9) air lter
Built with a galvanized sheet metal frame and a 48 mm thick pleated filtering sieve, in white fiberglass, contained by two welded
galvanized nets. The filter media has an ePM1 80% (F9) filtering degree, according to ISO 16890 and has a large filtering surface area
that guarantees long operating life and less frequent replacements.
Heat recovery hot gas defrost kit
The system consists of a specic circuit with a direct expansion heat exchanger with hot gas, acng as condenser, located
upstream the heat recovery unit on the room return air side. The hot gas allows to increase the air temperature in exhaust,
thus allowing the melng of ice which might deposit on the plate heat recovery unit during severe operang condions.

17
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
Electric re-heang coil (internal)
All units may be equipped with an internal re-heang electric coil, made up of armoured steel electric heaters, supplied
complete with PWM control system, safety thermostat already wired and installed on board.
Hot water coil (external)
The hot water coils are supplied in a dedicated secon to be installed in the supply air-ow line. The casing has the same sizes
and features of the main unit and it is xed with a dedicated installaon kit supplied with it. The coil is manufactured with
copper pipes thickness 0,4 mm and aluminium ns thickness 0,11 mm. The pipes are mechanically expanded in the aluminium
ns to increase the thermal exchange rate. On request, it is possible to install coils with dierent capacies from the standard
ones, when previously agreed with the factory.
3 way modulang valve
It consists of a kit including the 3-way valve for the control of the water ow, to be combined with the hot and/or cold water
coil, and its modulang electric actuator. Connecon and ng devices not included (to be arrange for by the installer).
Air damper with actuator
This is installed on board the unit and operate to exclude the fresh air intake and/or the room return air ow. This opon is
parcularly useful in areas with very cold winter temperatures, where it is necessary to avoid dangerous self-induced cold
air ows by the installaon itself, during the stand-by period of the unit, with the risk of freezing the water contained in the
water coils, if any. The damper is controlled by On/O actuator for the opening or the closing, or with return closing spring.
Feet for oor installaon
Galvanized steel xed feet kit for installing the unit on the oor.
Return side sound aenuator
The sound aenuator consists of a cylindrical secon made in galvanized steel sheet, containing a mineral wool sound
proong material covered with glass wool jacket and perforated galvanized steel sheet containment. The soundproong
material is class M0. The construcon avoids any risk of mineral wool fraying even at high air speeds. The cylindrical secon
is xed to the unit by screws.
Supply side sound aenuator
The sound aenuator consists of a cylindrical secon made in galvanized steel sheet, containing a mineral wool sound
proong material covered with glass wool jacket and perforated galvanized steel sheet containment. The soundproong
material is class M0. The construcon avoids any risk of mineral wool fraying even at high air speeds. The cylindrical secon
is xed to the unit by screws.

18
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
6. OPERATING MODE
6.1 Winter operang mode
The return air, after passing through the cross-flow heat recovery, goes to feed the heat pump source exchanger that operates as
an evaporator.
Through the vapour compression refrigeration cycle, the fresh air, coming out of the cross-flow heat recovery, is heated by the
heat pump user exchanger, which operates as a condenser. The modulation of the thermal capacity, obtained through the inverter
compressor, will allow to precisely control the supply air temperature.
During heating operation, the evaporator of the heat pump may be subject to the formation of surface frost with consequent loss of
efficiency. To prevent this from happening, the unit provides controlled management of a defrosting cycle obtained by reversing the
refrigeration cycle. During this phase the return fans are stopped and the compressors forced at maximum speed. Through
the additional heating resources present in the unit, water heating coils or electrical resistances, the supply air temperature is
maintained at a suitable value so as not to disturb the internal environment.
6.2 Summer operang mode
The return air, after passing through the cross-flow heat recovery, goes to feed the heat pump source exchanger, which operates
as a condenser. The fresh air, after passing through the cross-flow heat recovery, is cooled by the heat pump user heat exchanger,
which operates as an evaporator.
6.3 Free-Cooling operang mode
When the outside temperature is lower than the inside temperature of the room to be air-conditioned, if this needs cooling, the
units operate in free-cooling mode and all integrated heat recovery stages are disabled.

19
500 1000 1500 2500 3500
77,3 77,5 75,6 74,6 73,8
3,8 7,2 9,9 15,3 19,4
3,8 3,7 3,6 3,4 3,6
1,01 1,98 2,77 4,53 5,37
84,0 85,1 83,4 80,8 80,2
6,59 12,7 18,5 29,0 37,2
7,7 7,5 7,5 6,7 7,8
0,85 1,71 2,47 4,35 4,79
200 200 200 200 200
150 150 150 150 150
1 / 1 1 / 1 1 / 1 1 / 1 1 / 1
R32 / 675
1,08 / 0,73 1,39 / 0,94 1,54 / 1,04 2,29 / 1,55 2,42 / 1,63
12,3 13,4 17,6 18,7 21,4
230/1/50 400/3/50
ePM1 55% (F7)
ePM10 60% (M5)
655 745 788 1081 976
76,5 78,7 77,5 85,4 88,3
61,8 63,5 62,2 69,4 72,1
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
005 010 015 025 035
7. TECHNICAL DATA
(1) fresh air inlet +35 °C / 40% RH, return air +26 °C / 50% RH
(2) fresh air inlet -5 °C / 80% RH, return air +20 °C / 50% RH
(3) sound power level calculated in accordance with EN 3744
(4) sound pressure level measured at 1 m free eld distance, in accordance with EN 3744
MODEL
Nominal airow rate m3/h
Thermal eciency recovery in cooling mode (1) %
Total unit cooling capacity (1) kW
Total unit EER (1) -
Electrical power absorbed in cooling mode (1) kW
Heang recovery thermal eciency (2) %
Total thermal power of unit (2) kW
Total unit COP (2) -
Electrical power absorbed in heang (2) kW
Supply fan available stac pressure Pa
Return fan available stac pressure Pa
N° of compressors (DC inverter) / refrigerant circuits n°
Type of refrigerant / GWP
Refrigerant charge / CO2 equivalents ton n°
Max. electricity absorbed by the unit A
Power supply V/ph/Hz
Type of lters for fresh air secon
Type of lters for return air secon
SFPint W/(l/s)
Sound power level
(3)
dB(A)
Sound pressure level
(4)
dB(A)

0
50
100
150
200
250
300
450
600
750
900
1050
1200
1350
1500
1650
1800
0
50
100
150
200
250
300
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
0
50
100
150
200
250
300
100
150
200
250
300
350
400
450
500
550
600
650
MIN
MAX
MIN
MAX
MIN
MAX
20
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL- RXC/Hi SERIES
RXC/Hi 015 RXC/Hi 010 RXC/Hi 005
8. VENTILATION CURVES
The graphs below indicate the operang limits of the EC fans installed on the units.
Consider the stac pressure shown as available for ductwork, having a unit equipped with ePM10 60% (M5) lters on the
return side and ePM1 55% (F7) on the supply side.
The operang limits of the units may vary depending on the conguraon and the components installed. For
dierent unit conguraons, please refer to the selecon soware or contact the company.
Air ow [m³/h]
External Stac Pressure [Pa]
Air ow [m³/h]
External Stac Pressure [Pa]
Air ow [m³/h]
External Stac Pressure [Pa]