Riello NXH 005 Operating instructions

NXH 005 - 015
cod.Doc-0096185rev.0 05/2020
EN INSTALLATION AND TECHNICAL SERVICE INSTRUCTIONS

2
NXH
COMPLIANCE
RNXH heat pumps are compliant with the following European Directives:
—Electromagnetic Compatibility Directive 2004/108 / EC and subsequent changes
—Machinery Directive 2006/42 / CE and subsequent changes
—ErP Directive 2009/125/EC and Regulation (EU) 813/2013
—RoHS Directive 2011/65/EU
—F-Gas Regulation 2014/517/EU
—WEEE Directive 2012/19/EU
RANGE
Model Code
NXH 005 20161608
NXH 007 20161610
NXH 011 20161611
NXH 015 20161612
NXH 011T 20161613
NXH 015T 20161614
ACCESSORIES
For the complete list of accessories and the information relating to their usage combinations, please refer to the catalogue.
Dear Technician,
We would like to congratulate you on having recommended a Runit: a modern product that is capable of ensuring maximum
comfort at length, with a high degree of reliability, efficiency, quality and safety.
While your technical skills and knowledge will certainly be more than sufficient, this booklet contains all the information that we
have deemed necessary for the device's correct and easy installation.
Thank you again, and keep up the good work.
RIELLO

NXH
3
TABLE OF CONTENTS
This booklet cod. Doc-0096185 rev. 0 (05/2020) consists of 68 pag-
es.
The following symbols are used in this publication:
9
WARNING = actions requiring special care and appropri-
ate training.
0 DO NOT = actions that MUST ON NO ACCOUNT be carried
out.
1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . p. 4
1.1 General Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 4
1.2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 4
1.3 Unit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 5
1.4 Safety and adjustment devices. . . . . . . . . . . . . . . . . . p. 5
1.5 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 5
1.6 Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 6
1.7 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . p. 8
1.8 Performance based on the climatic zone . . . . . . . . . . p. 9
1.9 Operating limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 10
1.10 Available static pressure. . . . . . . . . . . . . . . . . . . . . . p. 10
1.11 Refrigerant circuit and sensors positioning. . . . . . . . . p. 12
2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 13
2.1 Receiving the product . . . . . . . . . . . . . . . . . . . . . . . . p. 13
2.2 Labels positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 13
2.3 Dimensions and weight . . . . . . . . . . . . . . . . . . . . . . . p. 13
2.4 Handling and removal of the packing . . . . . . . . . . . . p. 14
2.5 Place of installation . . . . . . . . . . . . . . . . . . . . . . . . . . p. 14
2.6 Recommended distances. . . . . . . . . . . . . . . . . . . . . . p. 15
2.7 Positioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 16
2.8 Installation on old systems or systems in need of
upgrading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
p. 17
2.9 Hydraulic schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 17
2.10 Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . p. 18
2.11 System water filling and drainage . . . . . . . . . . . . . . . p. 21
2.12 Wiring diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 22
2.13 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . p. 30
2.14 Control panel (ACCESSORY) . . . . . . . . . . . . . . . . . . . . . p. 35
3 COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . p. 55
3.1 Preparation for first commissioning . . . . . . . . . . . . . p. 55
3.2 Putting into service . . . . . . . . . . . . . . . . . . . . . . . . . p. 55
3.3 Temporary shutdown. . . . . . . . . . . . . . . . . . . . . . . . p. 55
3.4 Stop for an extended period of time . . . . . . . . . . . . p. 55
3.5 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 56
4 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . p. 62
4.1 Ordinary maintenance . . . . . . . . . . . . . . . . . . . . . . . p. 62
4.2 Tightening torque for main electrical connections . . p. 63
4.3 Tightening torque for main screws and nuts . . . . . . p. 63
4.4 Air side heat exchanger . . . . . . . . . . . . . . . . . . . . . . p. 63
4.5 Plates heat exchanger maintenance . . . . . . . . . . . . p. 63
4.6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p. 64
4.7 Refrigerant volume . . . . . . . . . . . . . . . . . . . . . . . . . p. 64

4
GENERAL INFORMATION
1 GENERAL INFORMATION
1.1 General Notices
9
When you get the product, check immediately that the con-
tents are all present and undamaged. Contact the dealer
Rif you notice any problems.
9
The product' s installation must be carried out by an au-
thorised company that will issue a declaration of the instal-
lation's conformity to the product's owner once the work
has been completed, indicating that the work has been car-
ried out in accordance with the standards of good practice,
current National and Local regulations, and the indications
provided by Rin the instruction booklet accompanying
the device.
9
The product must be used for its intended purpose, as stat-
ed by Rfor which it has been expressly manufactured.
Rshall bear no responsibility, whether of a contractual
or non-contractual nature, for any damage caused to peo-
ple, animals, or property due to incorrect installation, ad-
justments, or maintenance, or improper use.
9
Suitable clothing, instrumentation, and accident-preven-
tion devices must be utilized during the installation and/
or maintenance operations. Rshall bear no responsi-
bility for any failure to comply with current safety and acci-
dent-prevention regulations.
9
Comply with the legislation in force on the country of de-
ployment with regard to the use and disposal of packaging,
of cleaning and maintenance products and for the man-
agement of the unit's decommissioning.
9
Any repair and maintenance interventions must be carried
out by RTechnical Support Service, in accordance with
the provisions contained in this publication. Do not modify
or tamper with the unit as dangerous situations may arise
and the unit manufacturer will not be liable for any damage
caused.
9
The non-use of the appliance for a long period entails car-
rying out the operations described in the specific paragraph.
9
In the event of abnormal operation, or liquid leaks, set the
main switch of the system to "off" and close the shut-off
valves. Call the Technical Service promptlyRzone and do
not personally intervene on the appliance.
9
The units contain refrigerant gas: operate carefully so as to
avoid damaging the gas circuit and the fin bank.
9
Following the regulation EU UE n. 517/2014 on certain fluor-
inated greenhouse gases, is compulsory to indicate the re-
frigerant total amount in the installed system. >This infor-
mation is indicated on the unit nameplate.
9
This unit contains fluorinated greenhouse gases covered
by the Kyoto protocol. Maintenance and disposal activities
must be carried out exclusively by skilled personnel.
9
This unit can be installed in systems that require heating cy-
cles with anti-legionella function. It is mandatory to check
every single installation and complete it, where necessary,
with appropriate integration electric heaters in order to
guarantee the completion of the required sanitation cycles.
9
This booklet is an integral part of the device, and must
therefore be carefully preserved, and must ALWAYS accom-
pany it, even in the event that it is sold to another Owner
or User, or is transferred to another system. If it is damaged
or lost, another copy can be requested to RTechnical
Support Service in your Area.
1.2 Safety precautions
We remind you that the use of products that use electricity and
water involves the observance of some fundamental safety rules
such as:
0 Do not touch the unit while barefoot and/or partially wet.
0 Do not spray or throw water directly on the unit.
0 It is strictly forbidden to touch the coil fins, the moving parts,
to place any body parts between them, or to insert pointy
objects into the grilles.
0 It is forbidden to carry out any technical or cleaning work
before disconnecting the appliance from the power sup-
ply by placing the main switch of the system and the main
switch on the "OFF".
0 It is forbidden to modify the safety or regulation devices
without the authorisation of the manufacturer.
0 Do not pull, detach or twist the electrical wires coming out
of the unit, even when the unit is disconnected from the
power grid.
0 The packing material must not be disposed of in the sur-
rounding environment and must be kept out of children
reach, as it can be dangerous. It must be disposed of ac-
cording to the regulations in force.

5
GENERAL INFORMATION
1.3 Unit description
RNXH it is a range of heat pumps for the production
of hot water for space heating, domestic hot water for domes-
tic use (in combination with suitable boilers or exchangers) and
cold water for cooling.
Designed to be placed outdoors, it is suitable for use in residen-
tial and commercial applications.
The compressor, of the Rotary (NXH 005) or Twin-Rotary (NXH 007-
011-015) type, is regulated by the DC Inverter control with con-
tinuous power modulation. The compressor, working in combi-
nation with the electronic expansion valve, is therefore able to
guarantee maximum environmental comfort while maintaining
high energy standards.
The fans are driven by a permanent magnet synchronous motor
and are continuously modulated to obtain maximum perfor-
mance in all conditions of use, maximizing the silence of the
installation.
The hydronic module is always present and is supplied with a
variable speed circulation pump, flow switch, safety valve and
inlet and outlet water temperature probes.
The unit can be set and controlled by the remote control REC10CH,
the interface WUI, the free potential contacts or, if available, by
an existing modbus BMS.
1.4 Safety and adjustment devices
The safety and regulation of the appliance are obtained:
• on the cooling circuit with
—refrigerant temperature sensor on the compressor dis-
charge
—refrigerant temperature sensor on the compressor suction
• on the hydraulic circuit with
—water temperature sensors the detection of the water inlet
and outlet temperature
—flow switch to ensure unit operation with correct water
flow
—safety valve with intervention pressure 300 kPa
• The installer must necessarily provide in the system:
—a suitably sized expansion vessel
—a suitably sized technical water storage tank
—a by-pass valve between the delivery and return of the
appliance to allow the circulation of water in the unit even
if the same is isolated from the system. This serves to make
the antifreeze protection logics effective.
—a water filter entering the unit
—air vent valves in the highest points of the system
For further details refer to the chapter "Piping connec-
tions"
p. 20
9
Safety device replacement must be carried out by R
Technical Support Service, using only original components.
Please refer to the spare parts catalogue.
0 IT IS FORBIDDEN to operate the device with faulty safety sys-
tems.
1.5 Identification
The unit can be identified through the technical data plate:
XXXXXXXXXXX
XXX
XXX
XXX
XXX
XXX
XXX
Spain
XXXX
XXXXXXXX
XXX XX
XXXXXXXXXXX
Technical data plate
Contains the device's technical and performance data.
9
The tampering, removal, or absence of the identification
plates will not allow the product to be properly identified by
its serial number.

6
GENERAL INFORMATION
1.6 Layout
Model 005 - 007
1 Heat exchanger
2 Fan protection grille
3 Front panel
4 Compressor
5 Variable speed circulation pump
6 Electrical box
7 Flow switch
8 Circulation pump
9 Expansion vessel
10 Safety valve
11 Water inlet temperature probe
12 Pump release device
13 Water outlet temperature probe
14 Air bleeder valve
2
1
3
5
6
4
14
7
8
9
10
13
12
11
Model 011 - 015
1 Heat exchanger
2 Fan protection grille
3 Front panel
4 Compressor
5 Variable speed circulation pump
6 Reverse cycle valve
7 Electrical box
8 Flow switch
9 Expansion vessel
10 Safety valve
11 Water inlet temperature probe
12 Pump release device
13 Water outlet temperature probe
14 Air bleeder valve
2
3
1
4
5
6
7
14
8
12
9
10
13
5
11

7
GENERAL INFORMATION
Model 011T - 015T
1 Heat exchanger
2 Fan protection grille
3 Front panel
4 Compressor
5 Variable speed circulation pump
6 Reverse cycle valve
7 Electrical box
8 Flow switch
9 Expansion vessel
10 Safety valve
11 Water inlet temperature probe
12 Pump release device
13 Water outlet temperature probe
14 Air bleeder valve
2
3
1
4
5
6
7
14
8
12
9
10
13
5
11

8
GENERAL INFORMATION
1.7 Technical specifications
Model 005 007 011 015 011T 015T
Cooling performance [A35 / W7] (1)
Nominal capacity kW 4,00 5,55 11,20 12,80 10,65 13,00
EER kW/kW 3,10 3,10 3,40 3,10 3,40 3,20
SEER kW/kW 4,85 5,75 5,15 5,00 5,40 5,25
Seasonal energy efficiency (ns) %191 227 203 197 212 208
Cooling performance [A35/W18] (2)
Nominal capacity kW 4,85 8,00 13,70 16,00 13,75 17,00
EER kW/kW 4,35 4,00 4,60 4,10 4,65 4,15
Heating performance [A7/W55] (3)
Nominal capacity kW 4,45 6,75 11,20 11,65 10,25 11,80
COP kW/kW 2,80 2,70 2,95 2,90 3,00 3,00
SCOP kW/kW 3,32 3,36 3,35 3,45 3,34 3,40
Seasonal energy efficiency (ns) %130 131 131 135 131 133
Prated kW 3,00 4,00 9,00 10,00 9,00 11,00
Seasonal energy efficiency class A++
Heating performance [A7/W45] (4)
Nominal capacity kW 4,85 6,80 11,30 13,40 10,40 13,50
COP kW/kW 3,40 3,20 3,60 3,40 3,60 3,50
Heating performance [A7/W35] (5)
Nominal capacity kW 5,10 7,15 11,25 15,10 11,20 15,00
COP kW/kW 4,40 4,10 4,70 4,25 4,60 4,35
SCOP kW/kW 4,73 4,68 4,39 4,41 4,26 4,35
Seasonal energy efficiency (ns) %186 184 173 173 167 171
Electrical characteristics
Power supply V/ph/Hz+N 230/1/50 400/3/50
Permitted voltage V220 - 240 380 - 415
Total power input (6) kW 1,80 3,38 4,73 5,18 10,32 10,32
Full load current (7) A8,90 16,70 23,30 25,60 16,80 16,80
Compressor
Compressor Type Rotary
Minimum step %23 20 20 17 20 17
Refrigerant Type R410A
Refrigerant charge kg 1,10 1,60 2,80 2,80 3,00 3,00
Adjustment Type Inverter modulating valve
Fan
Fan Type Axial
Quantity no. 1 1 2 2 2 2
Maximum air flow m³/h 2880 2880 6480 6480 6480 6480
Maximum speed rpm 560 660 820 820 820 820
Plant side heat exchanger
Plant side heat exchanger Type With plates
Water content l1,7 2,3 4,4 4,4 4,4 4,4
Noise levels
Sound power level dB(A) 64 65 68 69 69 69
Sound pressure level dB(A) 33 34 37 38 38 38
Circulation pump
Type Variable speed centrifuge
Maximum operating pressure bar 333333
Maximum power input kW 0,075 0,14
Max. current input A0,60 0,60 1,10 1,10 1,10 1,10
(1) OAT: 35 °C, Water in/out: 12 / 7 °C
(2) OAT: 35 °C, Water in/out: 23 / 18 °C
(3) OAT: 7 °C b.s., 6 °C b.u. Water in/out: 47 / 55 °C
(4) OAT: 7 °C b.s., 6 °C b.u. Water in/out: 40 / 45 °C
(5) OAT: 7 °C b.s., 6 °C b.u. Water in/out: 30 / 35 °C
(6) Power absorbed by the compressors and fans at the limit operating conditions (i.e. with a saturated inlet temperature of 15 °C and a conden-
sation temperature equivalent to 68.3 °C) with a rated supply voltage of 400 V
(7) Maximum unit operating current
9
Performance are declared according to standards EN
14511:2018 and EN 14825:2016
9
The units are parameterized by default with limitation of the
maximum power delivered to 75%. It is possible to modify
this setting by acting on parameter 541 (adjustment range
50% -100%).

9
GENERAL INFORMATION
1.8 Performance based on the climatic zone
Model 005 007 011 015 011T 015T
Temperate zone - Average temperature [47 / 55 °C]
Seasonal energy efficiency (ns) %130 131 131 135 139 133
SCOP kW/kW 3,32 3,36 3,35 3,45 3,34 3,40
Pdesignh -7 °C kW 3,09 3,83 7,69 9,11 7,69 9,81
Pdesign at +2 °C kW 1,88 2,37 5,42 5,55 5,36 5,13
Pdesignh +7 °C kW 1,21 1,42 3,66 3,63 3,63 3,99
Pdesignh +12 °C kW 1,12 0,94 4,22 4,15 4,14 4,01
Annual energy cons. kWh/annum 2170 2651 5349 6159 5358 6734
Energy class A++
Sound power level dB(A) 64 65 68 69 69 69
Cold zone - Average temperature [30 / 35 °C]
Seasonal energy efficiency (ns) %186 184 173 173 167 171
Sound power level dB(A) 64 65 68 69 69 69
SCOP kW/kW 4,73 4,68 4,39 4,41 4,26 4,35
Pdesignh -7 °C kW 3,55 4,57 8,43 9,40 8,27 9,07
Pdesign at +2 °C kW 2,16 2,72 5,39 5,28 4,97 4,97
Pdesignh +7 °C kW 1,40 1,84 3,56 3,77 2,99 3,54
Pdesignh +12 °C kW 1,30 1,12 4,11 4,26 4,17 2,79
Annual energy cons. kWh/annum 1747 2273 4469 4967 4528 4858
Energy class A+++ A++
Warm zone - Average temperature [47 / 55 °C]
Seasonal energy efficiency (ns) %163 152 164 156 178 162
SCOP kW/kW 4,15 3,87 4,17 3,98 4,51 4,13
Pdesignh -7 °C kW ------
Pdesign at +2 °C kW 3,30 3,83 7,59 7,59 9,43 10,24
Pdesignh +7 °C kW 2,15 3,36 3,42 6,12 5,39 6,18
Pdesignh +12 °C kW 1,01 1,51 4,28 3,93 4,33 10,24
Annual energy cons. kWh/annum 1055 1317 2423 2539 2780 3300
Warm zone - Low temperature [30 / 35 °C]
Seasonal energy efficiency (ns) %230 259 230 225 232 225
SCOP kW/kW 5,83 6,54 5,83 5,73 5,87 5,71
Pdesignh -7 °C kW ------
Pdesign at +2 °C kW 3,60 5,00 8,70 10,20 8,40 9,80
Pdesignh +7 °C kW 2,33 3,86 5,53 7,24 5,61 7,32
Pdesignh +12 °C kW 1,15 1,77 4,23 4,19 4,27 4,23
Annual energy cons. kWh/annum 817 1013 1983 2376 1899 2283
Cold zone - Average temperature [47 / 55 °C]
Seasonal energy efficiency (ns) %100 111 109 107 112 108
SCOP kW/kW 2,57 2,84 2,80 2,75 2,86 2,78
Pdesignh -7 °C kW 3,35 5,06 7,85 8,32 8,06 8,51
Pdesign at +2 °C kW 2,04 3,08 5,55 5,27 5,60 5,32
Pdesignh +7 °C kW 1,33 1,99 3,39 3,41 3,42 3,45
Pdesignh +12 °C kW 1,14 1,43 4,23 4,13 4,28 4,17
Annual energy cons. kWh/annum 5078 6930 10922 11771 10951 11924
Cold zone - Low temperature [30 / 35 °C]
Seasonal energy efficiency (ns) %148 153 140 138 136 135
SCOP kW/kW 3,77 3,89 3,57 3,53 3,48 3,45
Pdesignh -7 °C kW 3,65 5,57 8,42 9,18 8,65 9,33
Pdesign at +2 °C kW 2,22 3,39 5,65 5,65 5,21 5,21
Pdesignh +7 °C kW 1,44 2,18 3,40 3,58 3,43 3,62
Pdesignh +12 °C kW 1,26 1,56 4,24 4,21 4,28 4,26
Annual energy cons. kWh/annum 3769 5566 9186 10118 9665 10527
9
Performance are declared according to standards EN
14511:2018 and EN 14825:2016

10
GENERAL INFORMATION
1.9 Operating limits
COOLING
A Outdoor air temperature
B Supply water temperature
C Model 005
A (°C)
C
b (°C)
-5
0
5
10
15
20
25
30
35
40
45
50
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
HEATING
A Outdoor air temperature
B Supply water temperature
b (°C)
A (°C)
-25
-15
-5
5
15
25
35
45
15 20 25 30 35 40 45 50 55 60 65
1.10 Available static pressure
NXH it is equipped with a variable speed circulation
pump.
For sizing the system, consider the residual head, shown below
in the graph.
MODEL 005
A Available head pressure
B Water flow
C High speed
D Medium speed
E Low speed
70
75
65
60
55
50
45
40
35
30
25
20
15
10
50 0,1 0,2 0,3 0,4
0,5
C
D
E
A (kPa)
b (l/s)

11
GENERAL INFORMATION
MODEL 007
A Available head pressure
B Water flow
C High speed
D Medium speed
E Low speed
70
75
65
60
55
50
45
40
35
30
25
20
15
10
50 0,1 0,2 0,3 0,4 0,5 0,6 0,7
C
D
E
A (kPa)
b (l/s)
MODEL 011 - 015
A Available head pressure
B Water flow
C High speed
D Medium speed
E Low speed
10 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
C
D
E
A (kPa)
b (l/s)

12
GENERAL INFORMATION
1.11 Refrigerant circuit and sensors positioning
The cooling circuit is of the heat pump type with cycle inversion
on the refrigerant gas. The source fluid used is the external air
while the user fluid is water possibly added with antifreeze liq-
uid.
In winter the heat pump extracts the thermal energy from the
outside air and transfers it to the user fluid by heating it, while
in summer the cycle is inverted and the thermal energy is ex-
tracted from the water, which cools down, and is transferred to
the air. external.
Depending on the type of system, the user fluid is sent to fan
coil units, air treatment units, radiant panels for room air condi-
tioning or to the boiler for the production of domestic hot water.
1 Compressor
2 Cycle reversal valve
3 Plate heat exchanger
4 Collector
5 Electronic expansion valve
6 Condenser coil
7 Intake separator
8 Service valva
9 Electric fans
A Circulation pump
B Safety valve
C Flow switch
D Expansion vessel
E Air bleed
F Hydronic module
• Probes
to outside air temperature
tl higher finned coil temperature
te lower finned coil temperature
td gas delivery temperature
ts suction temperature
TR coolant temperature
LWT water delivery temperature
EWT return water temperature
(1) Only model 011 - 015
(2) P024 and P027 only model 011 -
015

13
INSTALLATION
2 INSTALLATION
2.1 Receiving the product
RNXH it is supplied in a single package, on a wooden pallet
and protecetd by a cardboard box and a plystirebne protection.
The following material is attached to the canopy:
Document envelope:
—Instruction's book for the installer and for the Technical
Service in Italian
—Instruction's book for the installer and for the Technical
Service in English
—Warranty/Spare parts labels.
—dimensional drawing
—graphite rings to ensure EMC standards (see chapter
"Electrical connections"
p. 30 )
—fairleads
—fairleads
—condensate drain connection
9
The Instruction book comes with the equipment and it
should be taken, read and kept carefully.
9
The document envelope must be kept in a safe place. Any
duplicate must be requested from Riello S.p.A. which re-
serves to charge the cost.
2.2 Labels positioning
A Package label
B Transport label
b
A
2.3 Dimensions and weight
L
H
P
Model 005 007 011 015 011T 015T
Packaging dimensions
Lmm 960 960 960 960 960 960
Pmm 451 451 451 451 451 451
Hmm 960 960 1500 1500 1500 1500
Weight kg 64,0 76,0 122,0 122,0 128,0 128,0
L
H
P
Model 005 007 011 015 011T 015T
Product dimensions
Hmm 821 821 1363 1363 1363 1363
Lmm 908 908 908 908 908 908
Pmm 350 350 350 350 350 350
Weight kg 57,0 69,0 115,0 115,0 121,0 121,0

14
INSTALLATION
2.4 Handling and removal of the packing
9
Before unpacking, personal protective clothing should be
worn and used transport means and tools suitable for the
size and weight of the unit.
• The product can be handled in two ways:
—using a hoist or a crane
—using a fork lift or a transpallet which can bear its weight
It should be noted that even if a forklift / pallet truck is used, the
use of a hoist or crane is necessary to remove RNXH from the
pallet and place it in the required place of installation.
9
The equipment must always be handled vertically
9
Use a small balance to prevent that the pressure of the belts
damages the unit.
9
Do not tilt the equipment over 15°
9
The unit’s weight is concentrated on the compressors side
(electrical connections side).
1 Polyethylene film
2 Cardboard packaging
3 Polystyrene panel
1
2
3
• Follow the below instructions for packing removal:
—transport the equipment in the installation place, using
tools that can withstand the weight
—remove the polyethylene film
—remove the document envelope
—remove the cardboard packaging
—revove the polystirene protection
0 The packing material must not be disposed of in the sur-
rounding environment and must be kept out of children
reach, as it can be dangerous. It must be disposed of ac-
cording to the regulations in force.
The equipment is fixed to the pallet by 4 screws, two at the front
and two at the rear; these must be removed.
2.5 Place of installation
The location of RNXH devices must be determined by the
system's designer or by another competent person, and must
take into account the technical requirements, as well as any
current local regulations that require specific permits to be ob-
tained. (e.g.: zoning, architectural, environmental protection,
etc.).
It is therefore recommended to obtain all the necessary permits
before installing the device.
RNXH is designed for outdoor installation.
Avoid:
—positioning the unit in air shafts and/or basement window
wells
—any obstacles or barriers that will cause the expelled air to
recirculate
—places with the presence of aggressive atmospheres
—confined locations in which the device's sound levels
might be compounded by reverberations or resonances
—proximity to bedrooms and rooms for resting
—positioning in corners where dust, leaves, or any other
materials typically accumulate, which could compromise
the device efficiency by obstructing the airflow
—situations in which the air expelled from the device might
enter the habitation through doors or windows, thus cre-
ating an inconvenience for the people inside
—situations in which the air expelled from the device will
encounter resistance from opposing winds
—direct exposure to sunlight and proximity to heat sources

15
INSTALLATION
9
If the unit is installed in a windy location, fit an anti-wind
grille to protect the fan and check the correct functioning of
the unit.
2.6 Recommended distances
The distances for the device installation and maintenance are
shown in the figure. The indicated spaces are necessary in order
to prevent the airflow from being blocked, as well as to allow
normal cleaning and maintenance operations to be carried out.
Single installations
1000
150
150
150
150
200
500
1000
1000
300
500

16
INSTALLATION
Multiple installations
1000
1000 200 200
300300300150
300 300
1500 2000 2001000 300
2.7 Positioning
RNXH devices must:
—be positioned on a level surface that is capable of support-
ing their weight
—be positioned on a sufficiently rigid surface that will not
transmit any vibrations to the underlying or adjacent rooms
It is recommended to place a rubber sheet between the insole
and the appliance (60 shore hardness, 10 mm thick) or use ap-
propriately sized anti-vibration supports.
Provide for lifting of the unit from the floor:
—100 mm in case of installation in ordinary areas
—300 mm in case of installation in very cold areas or subject
to heavy snow
9
In case of installation in very cold areas or areas subject to
heavy snowfall, where freezing out is a possibility, foresee
appropriate antifreeze systems
A Positioning in ordinary areas
B Positioning in very cold areas or with heavy snow
1 Rubber sheet
300
100
A
1
B
600150 150
365 400
Condensation discharge
During heating operation, the unit generates condensate. The
condensate can be left to flow freely to the ground or conveyed

17
INSTALLATION
to a place suitable for drainage.
1 Condensate drain connection
1
• In case of free runoff:
—before placing the unit
—open the pre-cuts prepared on the base
9
The condensation settles on the support surface. In case of
sub-zero temperatures it can freeze and constitute a dan-
ger: provide suitable barriers to prevent people from ap-
proaching the unit.
• In case of conveyed discharge:
—insert a condensate drain fitting
—connect a drain hose
—direct to a place suitable for drainage
2.8 Installation on old systems or systems in need
of upgrading
When RNXH is installed on old systems or systems in need of
upgrading, it is recommended to ensure that:
—the electrical system is compliant with the applicable reg-
ulations and has been installed by qualified professionals
—the expansion tank ensures total absorption of the expan-
sion of the fluid contained in the system
—the system is washed, cleaned of sludge, scale, deaerated
and the seals have been checked
—a treatment system is provided when the feed / make-up
water is particular (see chapter"Water quality characteris-
tics"
p. 21 )
9
In the event of a replacement, the system must be inspected
by the designer or by another competent person, and must
be compliant with the technical requirements, as well as
the current legislations and regulations.
9
The manufacturer is not responsible for any damage caused
by incorrect installation of the systems and failure to clean
the hydraulic system.
2.9 Hydraulic schemes
Heat pumps require systems that guarantee a constant flow of
fluid to the appliance, within minimum and maximum values
and with sufficient volumes to avoid disturbances to the refrig-
erant circuits and to guarantee the correct degree of comfort.
0 IT IS FORBIDDEN to install the appliance in open vessel sys-
tems.
2.9.1 Plant water content
For correct operation of the appliance, a minimum volume of
water must be guaranteed in the primary circuit of the system.
9
The minimum volume is necessary to prevent the risk of ice
formation during defrosting operations or the continuous
modulation of the compressor frequency.
It also allows the following advantages:
—less wear on the appliance
—increase in system efficiency
—migliore stabilità e precisione della temperatura
• Il volume minimo è calcolato in base alla seguente formula:
• Vmin = Cnom x N
Vmin better temperature stability and precision
Cnom Nominal cooling capacity under the conditions envis-
aged for the system in kW
N Multiplication factor
Application N
Cooling 3,5
Heating or domestic hot water 6
If the minimum volume is not reached, a suitably sized storage
tank must be provided.
2.9.2 Water flow
The water flow rate must be kept constant during operation and
must comply with the limits shown in the table:
Model 005 007 011 015 011T 015T
Hydraulic characteristics
Minimum water
flow m³/h 0,2 0,4 0,6 0,6 0,6 0,6
Nominal water flow m³/h 0,9 1,2 1,9 2,6 1,9 2,6
Maximum water
flow m³/h 4,3 4,3 7,0 7,0 7,0 7,0

18
INSTALLATION
System scheme for heat pumps cascade
1 NXH
2 External sensor (option)
3 Temperature probe for cascade connection (accessory)
111 1
2
3
9
Only units of the same model can be cascaded.
2.10 Hydraulic connections
The size and positioning of the hydraulic connections of R
NXH are shown in the following table.
Before installation, it is advisable to wash all the pipes of the
system thoroughly to remove any processing residues.
MODEL 005 - 007
A System return
B System delivery
C Discharging
40
60
466
356
87
A
b
C

19
INSTALLATION
MODEL 011 - 015
A System return
B System delivery
C Discharging
73
43
645
744
169
A
b
C
Model System return System delivery Discharging
Inches Inches Inches
005 1 1 3/4
007 1 1 3/4
011 1 1 3/4
015 1 1 3/4
011T 1 1 3/4
015T 1 1 3/4
9
The choice and installation of the system components is
delegated to the installer, who will have to operate accord-
ing to the rules of good technique and current legislation.
9
The discharge of the installed safety valves must be con-
nected to an adequate collection and evacuation system.
The manufacturer of the appliance is not responsible for any
flooding caused by the intervention of the safety valves.
9
Is suggested to put a by-pass connection for the heat pump
in order to allows the cleaning of the system pipes without
disconnecting the unit.
9
The connection tubes must have the appropriate diameter
and must be supported, so as not to rest their weight on
the unit.
9
The systems with anti freeze additives or specific local laws,
require the installation of hydraulic backflow preventers.
9
Check the pressure drops of the appliance, the system, and
any other accessories mounted in line.
9
Do not use the heat pump for treating industrial water,
swimming pool water or domestic water. If water supplies of
this kind are used, an intermediate heat exchanger must be
used. Make sure to maintain the min. water content, possi-
bly adding a storage.
9
If the unit works in a system with a boiler >(parallel instal-
lation) when the boiler is working, make sure that the water
temperature inside the heat pump does not exceed 60 °C.
Mandatory items:
—install a removable mesh water filter at the inlet to the ap-
pliance in an area accessible to maintenance, with char-
acteristics of at least 10 meshes / inch², to protect the ap-
pliance from impurities in the water
—after the installation of the system and after each repair, it
is essential to clean the entire system thoroughly, paying
particular attention to the condition of the filter
—install a suitably sized expansion vessel
—install air vent valves in the highest points of the pipes
—install air vent valves in the highest points of the pipes
—ensure that the quantity of water in the primary circuit is
greater than the minimum volume indicated in the chap-
ter "Plant water content"
p. 17 , ensure that the quantity
of water in the primary circuit is greater than the minimum
volume indicated in the chapter
—Foresee the pipes insulation, after the leackage verifica-
tion, in order to minimize the heat loss and the conden-
sate effect.
—Use anti freeze additives in order to prevent the wter freez-
ing if the water circuit and pipes are exposed to ambient
temperature below 0°C.
0 It is forbidden to run the unit without a clean water filter
installed.

20
INSTALLATION
2.10.1 Piping connections
NXH
A Factory connections
B Field connections (for installer)
1 Plate heat exchanger
2 Temperature sensor
3 Circulation pump
4 Safety valve
5 Flow switch
6 Expansion vessel
7 Mesh filters (available as an option)
8 Stop valves
9 Filling valve
10 Pressure gauge
11 Discharge tap
12 By-pass valve for freezing protection
13 Calibration valve
14 Anti-vibration joint
15 Additional expansion vessel (if nec-
essary)
16 Air bleed
17 Thermometer
T
T
1
2
2
3
45
6
7
A B
8 9 8
10
11
12
13 8
8
8
8
14
14 15
16
16
17
17
The hydraulic connections must be completed by installing:
—mesh filters (available as an option)
—Discharge tap
—additional expansion tank (if necessary)
—a suitably sized technical water storage tank
—filling group
—return and delivery thermometers
—air vent valves in the highest points of the pipes
—flexible elastic joints
—shut-off valves
—shut-off valves for chemical washing
—una valvola di by-pass tra mandata e ritorno dell'apparec-
chio, per protezione antigelo durante il periodo invernale
Cascade units
1 Stop valves
2 Calibration valve
3 Check valve
4 Cascade probe
1 1 1 1
1 1 1 1
2
3
2
3
2
3
2
3
4
9
Only units of the same model can be cascaded.