Vortice RXH/Hi Series User manual

www.vorticeindustrial.com
[email protected]
Installaon Operaons and Maintenance manual
RXH/Hi series
cod. 4700050611 13/01/2023
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 - RXH/HiSERIES
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 - RXH/HiSERIES
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 - RXH/HiSERIES
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 Heat recovery (1° recovery stage) .................................................................................................................. 12
2.4 Heat pump refrigerant circuit (2° recovery stage) ......................................................................................... 13
2.5 Electric box ..................................................................................................................................................... 13
2.6 Control system ................................................................................................................................................ 13
2.7 Air lters ......................................................................................................................................................... 13
2.8 Fans ................................................................................................................................................................. 13
2.9 Test .................................................................................................................................................................. 14
2.10 Packing .......................................................................................................................................................... 14
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 .............................................................................................................................................................. 23
10. SOUND DATA ..................................................................................................................................................................... 24
10.1 Noise levels .................................................................................................................................................... 24
10.2 Sound aenuators reducon ........................................................................................................................ 24
11. SAFETY AND CONTROL DEVICES ....................................................................................................................................... 25
12. INSTALLATION ................................................................................................................................................................... 26
12.1 Receipt and inspecon ................................................................................................................................. 27
12.2 Storage .......................................................................................................................................................... 27
12.3 Unpacking ..................................................................................................................................................... 27
12.4 Liing and Handling ..................................................................................................................................... 28
12.5 Posioning .................................................................................................................................................... 29
12.5.1 Preliminary noce ..................................................................................................................................... 29
12.5.2 Service area requirements ........................................................................................................................ 31
12.6 Secon coupling and bolng ........................................................................................................................ 31
12.7 Hydronic connecons ................................................................................................................................... 33
12.8 Hydraulic connecon to the exchange water coils ...................................................................................... 33
12.9 Anfreeze electric coil secon ..................................................................................................................... 34
12.10 Connecng the unit to air ducts ................................................................................................................ 35

05
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
13. MODBUS-RS485 / BACnet SERIAL INTERFACE CARD ........................................................................................................ 36
14. CO2 PROBE ........................................................................................................................................................................ 36
15. FILTERS and HEAT EXCHANGER EXTRACTION ................................................................................................................... 37
16. REFRIGERANT DIAGRAM................................................................................................................................................... 38
16.1 Refrigerant circuit with 1 compressor.......................................................................................................... 38
16.2 Refrigerant circuit with 2 compressors ........................................................................................................ 39
17. ELECTRICAL CONNECTIONS .............................................................................................................................................. 40
17.1 Electrical data ............................................................................................................................................... 41
17.2 Power supply connecon ............................................................................................................................. 41
17.3 Terminal Block Connecons ......................................................................................................................... 42
17.4 Connecons on main board ......................................................................................................................... 43
17.5 Descripon of the remotable control panel ................................................................................................ 44
17.5.1 Posion of the control panel ..................................................................................................................... 44
17.5.2 Remote panel keys .................................................................................................................................... 44
17.5.3 Dimensions ................................................................................................................................................ 45
17.5.4 Wall installaon ......................................................................................................................................... 45
17.5.5 Electrical connecon ................................................................................................................................. 46
18. STARTUP ............................................................................................................................................................................ 46
18.1 Preliminary checks ........................................................................................................................................ 46
18.2 Checks during the operaon ......................................................................................................................... 47
19. UNIT USE ........................................................................................................................................................................... 48
19.1 Funcon of display icons .............................................................................................................................. 48
19.2 Factory default sengs ................................................................................................................................ 48
19.3 Switching on and parameters seng .......................................................................................................... 49
20. DIAGNOSIS AND TROUBLESHOOTING .............................................................................................................................. 53
20.1 Troubleshoong............................................................................................................................................ 53
21. DIMENSIONAL DRAWINGS................................................................................................................................................ 56
22. UNIT MAINTENANCE ........................................................................................................................................................ 58
22.1 General warnings ......................................................................................................................................... 58
22.2 Access to the unit ......................................................................................................................................... 58
22.3 Periodical checks .......................................................................................................................................... 59
22.4 Refrigeraon circuit repair ........................................................................................................................... 59
23. DISMANTLEMENT, MATERIALS’ DISPOSAL AND RECYCLING ............................................................................................ 60
23.1 Unit disconnecon ....................................................................................................................................... 60
23.2 RAEE Direcve (EU only) .............................................................................................................................. 61

06
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
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 - RXH/HiSERIES
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 - RXH/HiSERIES
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 - RXH/HiSERIES
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 - RXH/HiSERIES
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 - RXH/HiSERIES
Fam. / Type
Serial Number
Power Supply
Refrigerant type
Wiring diagram n°
Refrigerant Charge:
Circ. 1 + Circ. 2
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. 1 + 2
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
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.
1
2
3
4
6
7
11
8
5
9
12
13
14
15
16
17
18
19
20
21
22
23
24
10
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 circuits 1 & 2
(11) CO2 equivalents
(12) Electric power input on supply fan
(13) Electric power input on exhaust fan
(14) Electric power input on circuits 1 & 2 compressors
(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).

12
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
2. TECHNICAL CHARACTERISTICS
2.1 Introducon
Any room requires the correct supply of outside air and at the same time the control of the internal thermohygrometric
conditions. Through the recovery of energy from the air extracted from the environment, through the use of systems with
integrated heat pump technology, an economic way in the installation of energy-efficient power plants is offered, which also
ensures the degree of comfort to the occupants, both in summer and winter and without added costs in the management of
primary air.
For buildings that require air exchange and are not equipped with dedicated air conditioning systems, the installation of these
units allows the introduction of primary air at a controlled temperature without disturbing the internal conditions in the
occupied spaces. It is therefore not necessary to use additional systems to heat or cool the incoming primary air. Moreover,
these units allow to guarantee a support to the air conditioning system in the intermediate seasons by exploiting the free-
cooling or free-heating periods. If installed on existing buildings, they guarantee the energy upgrading of the system through
the management of the air exchange without additional charges.
On new installations, on the other hand, the air exchange is completely carried out allowing to reduce the size of the main air
conditioning system. In the intermediate seasons the building will benefit from the free or partial cooling generated by these
units, which during the partial load phases allow the main system to operate with higher efficiencies.
2.2 Structure
The structure of the units can be realized in two versions:
VERSION 1:
Profiles 50 x 50 mm in self-supporting extruded anodized aluminium, with mechanical strength requirements in accordance with
EN 1886: D1 (M). 50 mm thick double-walled sandwich type paneling with exterior in pre-painted RAL 9010 galvanized sheet steel
and interior in hot-dip galvanized sheet steel with interposed insulation made of polyurethane foam with a density of 40 kg/m3.
This structure has a seal class L1 while the thermal transmittance and the thermal bridge characteristic is class T3/TB4 according
to EN1886.
VERSION 2:
Thermal break profiles 60 x 60 mm in self-supporting extruded anodized aluminium, with mechanical strength requirements in
accordance with EN 1886: D1 (M). 63 mm thermal break sandwich-type double-walled sandwich type panels with exterior in
pre-painted RAL 9010 galvanized sheet steel and interior in hot-dip galvanized sheet steel with interposed insulation made of
polyurethane foam with a density of 40 kg/m3. This structure has a seal class L1 while the thermal transmittance and the thermal
bridge characteristic is class T2/TB2 according to EN1886.
Safety microswitches are applied to the inspection doors to allow internal access to the various compartments of the unit only when
the unit is completely switched off. The main access and inspection panels consist of inspection doors with perimeter hinges made
of non-corrosive polyamide and handles.
All units can be supplied in both monobloc and modular sections for on-site assembly when required.
The units are supplied as standard in a MONOBLOCK conguraon, in case of mul-secon units, they are
available in special execuon. Please contact the Company for further details.
2.3 Heat recovery (1° recovery stage)
The units are equipped with a counter-flow heat exchanger in aluminium (painted on request) used in cooling/heating
mode to transfer the heat from the exhaust air to the inlet fresh air. The heat exchange is counter-flow with efficiencies
higher than 80%. The spacing between the fins is optimized in order to reduce the pressure drop on the air side and the
electrical consumption of the fan. Under certain conditions of low outside air temperature and high humidity, the heat
recovery may start to frost. Through the integrated control system it is possible to manage the defrosting of the heat
recovery by activating different stages of electrical resistances (pre-heaters), or by activating the recirculation damper.
The heat recovery is also equipped with an additional by-pass damper for the management of the free-cooling and
free-heating mode. The heat exchanger participates to the Eurovent Certification program and it is sized according to
the ECO Design specification.

13
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
2.4 Heat pump refrigerant circuit (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 R410A 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.
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 Air lters
ePM10 60% (M5) lters in return air and ePM1 55% (F7) rigid bag lters in fresh air. Both types of lters are mounted on slides
equipped with gaskets to ensure eecve sealing. Their posion, upstream of the internal components, also guarantees their
protecon.
2.8 Fans
The units are equipped with high eciency plug-fan type fans with built-in brushless EC motor. In this way it is possible to
guarantee an accurate regulaon of the airow both in the supply and extract secon, ensuring that all regulatory requirements
such as SFP are met with. The airow rate of the fan is managed through the integrated electronic control system thus
ensuring, according to the needs of the system, that the correct operaon of the unit is maintained with consequent saving
of the energy absorbed by the unit.
The fans are xed to the frame by means of selfcentering brackets to ensure the correct distance between the impeller and
the nozzle, thus opmizing performance.

H2 H1
14
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
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 feet and wrapped in plasc lm to protect against impacts during transport and handling
on site.
3. CONFIGURATIONS
EXHAUST
FRESH AIR
SUPPLY
RETURN
SUPPLY
RETURN
EXHAUST
FRESH AIR

1
2
3
5
4
12
8
7
9
10
11
5
6
15
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
4. MAIN COMPONENTS OF THE UNIT
1Return air filter 8Heat pump user exchanger
2Counterow heat exchanger 9Backward blade fan, EC brushless motor with
external rotor (supply side)
3Heat pump source exchanger
4Backward blade fan, EC brushless motor with
external rotor (exhaust side) 10 Compressors with inverters complete with heat pump refrigerant circuit
5Air damper with actuator (1) 11 Electrical panel
6Fresh air inlet filter 12 Microprocessor control panel with
LCD display
7By-Pass damper on heat exchanger
(1) component supplied on request as an accessory

16
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
5. AVAILABLE ACCESSORIES
Return side grease ISO coarse 40% (G2) air pre-lter
It is built with galvanized sheet metal frame, ltering media in galvanized wire tubular sock, 48mm thickness, contained by
two welded galvanized nets. The lter is used in the presence of dust and large pollutants suspended in the air or in case of
ltraon of oily mists. 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.
Return / 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 the ePM10 60% (M5), ePM1 55% (F7) or ePM1 80% (F9) lters, located on the room air return side and/or supply air side.
Return / Supply side ePM1 55% (F7) 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 80% (F9) lters, located on the room air return side and/or supply air side.
Return / 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 / Supply side ePM1 55% (F7) air lter
Built with a polyester frame and a rigid bag lter media, ckness 292 mm, made of white glass microbre. 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 / Supply side ePM1 80% (F9) air lter
Built with a polyester frame and a rigid bag lter media, ckness 292 mm, made of white glass microbre. The lter media
has an ePM1 80% (F9) ltering degree, according to ISO 16890 and has a large ltering surface area that guarantees long
operang 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.
Anfreeze electric coil (external)
The anfreeze system consists of an electric coil installed on the fresh air inlet. It is supplied in a dedicated secon external
to the base unit to be xed using an installaon kit supplied with it.
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.
Water control valve
It consists of a kit including the 3-way valve for the control of the water ow, to be combined with the hot water coil, and its
modulang electric actuator. Connecon and ng devices not included (to be arrange for by the installer).

17
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
Hot water coil (external)
The hot water 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.
Cold water coil (external)
The coil is manufactured with copper pipes thickness 0,40 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 thermal performances dierent from the standard ones, when previously agreed with the factory. The cooling coil
secon is supplied complete with condensate drain pan with water discharge.
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.
Roof for outdoor installaon
Flat roof rainproof for outdoor execuon, made of pre-painted sheet metal.
45° hood with bird-trap
Rain hood with 45° angle for outdoor execuon, to be applied in fresh air inlet or exhaust air, complete with bird-trap net.
CO2 probe
Units can be equipped with air quality CO2 probe. This accessory is installed and wired in the factory.
If it's installed on the return air duct it allows to determine the quanty of carbon dioxide present in the environment,
increasing the quanty of external air to dilute its content.
Remotable control panel
All units are supplied as standard with a microprocessor control panel with high-resoluon display, installed on board the
unit. It is possible, however, to install a second control panel remotable up to 50 m away.
BACnet interface
Communicaon protocol BACnet for building automaon and control (BAC) networks that use the ASHRAE, ANSI, and ISO
16484-5 standards protocol.
Flexible joint
Flexible joint for rectangular ducts, complete with galvanized steel ange.
Sound aenuator on return / supply side (external)
The sound aenuator is supplied in a dedicated secon external to the base unit, with the same sizes and features of the main
unit, to be xed using an installaon kit supplied with it.
The sound aenuator baes are made of mineral wool, thickness 100/200 mm, density 90 kg/m3, protected by a fabric veil
that prevents any risk of fraying of the mineral wool even at high air velocies.
The mineral wool is contained in a galvanised frame with a galvanised steel microstretched retaining mesh.
The sound-absorbing material is class M0.

18
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
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 outdoor air temperature is lower than the
temperature of the room to be air-conditioned and if
the latter requires cooling, the unit operates in Free-
Cooling mode. All integrated heat recovery stages
are disabled and the By-Pass damper positioned on
the plate heat exchanger is opened, thus allowing the
entry of outdoor air without heat recovery.

19
011 021 031 041 061 081 101
1000 2000 3000 4500 6000 8000 10000
77,90 78,40 77,90 77,90 78,10 78,50 74,90
6,59 14,75 21,98 33,82 43,70 54,24 66,46
6,79 5,57 5,97 5,98 5,46 6,09 5,63
1,63 3,88 5,62 8,67 11,93 14,11 17,79
92,90 94,20 94,40 94,60 94,70 95,30 89,10
12,73 24,74 40,31 56,69 77,91 98,73 122,72
12,60 13,98 11,10 13,03 11,63 12,36 10,31
1,67 2,95 5,52 7,26 10,54 13,00 17,68
250 250 250 250 250 250 250
200 200 200 200 200 200 200
1111111
R410A
1111111
26,90 26,80 34,00 44,40 53,50 60,20 64,20
400 V +- 10% / 3 / 50 + N +
ePM1 55% (F7)
ePM10 60% (M5)
2,09 1,96 2,15 2,18 2,18 2,19 1,99
80 80 80 84 84 85 85
66 65 68 69 73 73 72
57 56 54 59 59 60 60
062 082 102 132 172 242
6000 8000 10000 13000 17000 24000
78,10 78,50 74,90 75,10 75,30 74,90
43,80 55,00 67,49 93,77 116,77 149,75
5,41 5,92 5,62 5,32 5,36 5,76
12,03 14,50 17,99 25,87 32,36 42,08
94,70 95,30 89,10 89,70 90,20 89,80
78,06 100,25 126,22 156,99 204,52 265,78
11,92 12,69 10,40 11,97 11,95 15,18
10,39 12,91 17,92 21,17 27,54 32,87
250 250 250 250 250 250
200 200 200 200 200 200
2 2 2 2 2 2
R410A
1 + 1 1 + 1 1 + 1 1 + 2 1 + 2 1 + 2
51,40 53,40 73,60 84,70 99,70 103,70
400 V +- 10% / 3 / 50 + N +
ePM1 55% (F7)
ePM10 60% (M5)
2,18 2,19 1,99 2,13 2,09 2,26
84 85 85 92 94 96
73 73 72 76 77 85
59 60 60 61 63 63
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
7. TECHNICAL DATA
MODEL
Nominal airow rate m3/h
Thermal eciency recovery in cooling mode (1) %
Total unit cooling capacity (1) kW
Total EER of unit (1) -
Electrical power absorbed in cooling mode (1) kW
Heang recovery thermal eciency (2) %
Total thermal power of unit (2) kW
Total COP of unit (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 refrigerant circuits n°
Type of refrigerant
Number of compressors: Inverter 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
SFP factor lters W/(l/s)
Supply sound power level
(3)
dB(A)
Return sound power level
(3)
dB(A)
Sound pressure level in scale A (ISO EN 3744)
(4)
dB(A)
MODEL
Nominal airow rate m3/h
Thermal eciency recovery in cooling mode (1) %
Total unit cooling capacity (1) kW
Total EER of unit (1) -
Electrical power absorbed in cooling mode (1) kW
Heang recovery thermal eciency (2) %
Total thermal power of unit (2) kW
Total COP of unit (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 refrigerant circuits n°
Type of refrigerant
Number of compressors: Inverter + On/O 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
SFP factor lters W/(l/s)
Supply sound power level
(3)
dB(A)
Return sound power level
(3)
dB(A)
Sound pressure level in scale A (ISO EN 3744)
(4)
dB(A)
(1) fresh air inlet +35 °C / 40% RH, return air +26 °C / 50% RH (3) sound power level calculated in accordance with EN 3744
(2) fresh air inlet -10 °C / 90% RH, return air +20 °C / 50% RH (4) sound pressure level meausured at 1 m free eld distance, in accordance with EN 3744

0
50
100
150
200
250
300
350
400
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
0
50
100
150
200
250
300
350
400
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
0
50
100
150
200
250
300
350
400
450
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
MIN
MAX
MIN
MAX
MIN
MAX
20
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXH/HiSERIES
RXH/Hi 031 RXH/Hi 021 RXH/Hi 011
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]