CLIMAVENETA BRA2 0021 Operating instructions

Water chillers a d air/water heat
pumps with ce trifugal fa s
EN
BRA2 0021÷0061
BRN2 0021÷0061
INSTALLATION, USER AND MAINTENANCE MANUAL

2BRA2 - BRN2 EN
INDEX
The manufacturer reserves the right to modify the data in this manual without warning.
ENVIRONMENTAL INFORMATION: This unit contains fluorinated greenhouse gases covered by the Kyoto Protocol.
The maintenance and disposal operations must only be carried out by qualified personnel.
General warnings 3
Waiver of liability 3
Fundamental safety rules 3
Identification 4
Receiving, handling and installing the 4
product
Characteristics 5
Dimensioned drawings 6
Water connections 7
Air ducting 11
Electrical connections 13
Mains power supply connections 14
Installer connections 14
General technical data 16
Operating limits 18
Pressure drop and pressure head available 19
to system
Fan pressure gain curves 21
Checking and starting up the unit 22
Led e displays 23
Displaying alarms 32
Peak limiter alarm signals 33
Operating characteristics 35
Shutting down for long periods 36
Routine maintenance 36
Special maintenance 36
Disposal 36
Troubleshooting 37
Useful information 39
U I A
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U I A
UIA
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User
Installer
Assistance
Important
Prohibition
Danger voltage
Danger high temperatures
The following symbols are used in some parts of this publication and inside the unit:
U
I
A

3
BRA2 - BRN2 EN
GENERAL WARNINGS U I A
These appliances have been designed to chill and/or
heat water and must be used in applications compatible
with their performance characteristics; these appliances
are designed for residential or similar applications.
Incorrect installation, regulation and maintenance or
improper use absolve the manufacturer from all liability,
whether contractual or otherwise, for damage to people,
animals or things.
Only those applications specifically indicated in this list
are permitted
Read this manual carefully. All work must be carried
out by qualified personnel in conformity with legislation in
force in the country concerned.
The warranty is void if the above instructions are not
respected and if the unit is started up for the first time with-
out the presence of personnel authorised by the Company
(where specified in the supply contract) who should draw up
a “start-up” report.
The documents supplied with the unit must be consigned
to the owner who should keep them carefully for future con-
sultation in the event of maintenance or service.
When the items are consigned by the carrier, check that the
packaging and the unit are undamaged.
If damage or missing components are noted, indicate this on
the delivery note. A formal complaint should be sent via fax
or registered post to the After Sales Department within eight
days from the date of receipt of the items.
All repair or maintenance work must be carried out by the
Company’s Technical Service or qualified personnel follow-
ing the instructions in this manual.
Do not modify or tamper with the appliance as this may cre-
ate situations of danger; in such cases the manufacturer of
the appliance is not liable for any damage caused.
FUNDAMENTAL SAFETY RULES U I A
WAIVER OF LIABILITY U I A
When operating equipment involving the use of electricity and water, a number of fundamental safety rules must be observed,
namely:
This publication is the sole property of Climaveneta. Any
reproduction or disclosure of such is strictly prohibited with-
out the written authorisation of Climaveneta.
This document has been prepared with maximum care and
attention paid to the content shown. Nonetheless, Cli-
maveneta waives all liability deriving from the use of such
document.
Read this document carefully.
All work must be performed, components selected and
materials used professionally and in complete accordance
with the legislation in force in material in the country con-
cerned, and considering the operating conditions and
intended uses of the system, by qualified personnel.
The unit must not be used by children or by unfit per-
sons without suitable supervision.
Do not touch the unit with bare feet or with wet or
damp parts of the body.
Never perform any cleaning operations before having
disconnected the unit from the mains power supply.
Do not modify safety or control devices without authori-
sation and instructions from the manufacturer.
Do not pull, detach or twist the electrical cables coming
from the unit, even when disconnected from the mains
electricity supply.
Do not open doors or panels providing access to the
internal parts of the unit without first ensuring that the
mains switch is in the off position.
Do not introduce pointed objects through the air
intake and outlet grills.
Do not dispose of, abandon or leave within reach of
children packaging materials (cardboard, staples, plastic
bags, etc.) as they may represent a hazard.
Power supply to the unit must be disconnected using a
switch with suitable characteristics, to be supplied and
installed by the installer.
Respect safety distances between the unit and other
equipment or structures. Guarantee adequate space for
access to the unit for maintenance and/or service opera-
tions (see the figure on page 5).
Power supply: the size of the electrical cables must be
adequate for the power of the unit and the power supply
voltage must correspond with the value indicated on the
respective units. All units must be earthed in conformity
with legislation in force in the country concerned.
Some terminals in the electrical panel may be pow-
ered even after the unit is disconnected.
Make sure power is not connected before proceeding.
Water connections should be carried out as indicated in
the instructions to guarantee correct operation of the
unit.
Add glycol to the water circuit if the unit is not used dur-
ing the winter or the circuit is not emptied.
Handle the unit with the utmost care (see weight distrib-
ution table) to avoid damage.

BRA2 - BRN2 EN
4
MODEL:
VOLTAGE:
CODE:
De' Longhi S.p.a. - 31100 Treviso / Italia
Via L.Seitz, 47 - tel. [phone] fax [phone]
COOLING CAPACITY ------------------- kW
HEATING CAPACITY ------------------- kW
REFRIGERANT TYPE -------------------
REFRIGERANT CHARGE ------------------- Kg
MAXIMUM PRESSURE ------------------- bar
MAIN ELECTRICAL POWER SUPPLY ------------------- V---Hz
AUXILIARY ELECTRICAL POWER SUPPLY ------------------- V---Hz
MAX. POWER INPUT ------------------- kW
MAX. CURRENT INPUT ------------------- A
START-UP CURRENT ------------------- A
WIRING DIAGRAM ------------------- N°
OPERATING WEIGHT ------------------- Kg
YEAR OF FABRICATION -------------------
IDENTIFICATION U I A
The chiller can be identified by the:
Packaging label
Giving the data identifying the product.
Rating plate
Giving the technical and performance data of the unit.
If this is lost, ask the After Sales Service for a replacement.
Tampering with or the removal or absence of rating
plates or other means enabling the unit to be identified
causes problems during installation and maintenance.
RECEIVING, HANDLING AND INSTALLING THE PRODUCT I A
The chillers are supplied accompanied by:
- installation, user and maintenance manual;
- CE declaration;
CHOICE OF INSTALLATION SITE
Before installing the unit, agree with the customer the site
where it will be installed, taking the following points into con-
sideration:
• Check that the fixing points are adequate to support the
weight of the unit;
• Pay scrupulous respect to safety distances between the
unit and other equipment or structures to ensure that air
entering the unit and discharged by the fans is free to cir-
culate.
HANDLING AND POSITIONING
The unit should always be handled by qualified personnel
using equipment adequate for the weight of the chiller.
• Before handling the unit, check the capacity of the lift
equipment used, respecting the instructions on the pack-
aging.
• To move the unit horizontally, make appropriate use of a
lift truck or similar, bearing in mind the weight distribution
of the unit.
To lift the unit, insert tubes long enough to allow position-
ing of the lifting slings and safety pins in the special feet
on the unit.
For the sizes of these tubes, see the figures shown in the
corresponding section.
• To avoid the slings damaging the unit, place protection
between the slings and the unit.
Position the unit in the site indicated by the customer.
Place either a layer of rubber (min. thickness 10 mm) or
vibration damper feet (optional) between the base and
support surface.
Fix the unit, making sure it is level and that there is easy
access to water and electrical components.
If the site is exposed to strong winds, fix the unit ade-
quately using tie rods if necessary.
If a heat pump unit is being installed, make sure the con-
densate is drained using the drain hose supplied as stan-
dard.
Prevent leaves, branches or snow from accumulating
around the unit. These could reduce the efficiency of the
unit.
The installation, user and maintenance manual is an
integral part of the unit and should therefore be read and
kept carefully.
It is recommended that the packaging should not be
removed until the unit is located in the installation site.
During transport, the chiller should be kept in a verti-
cal position
The weight of the chiller is biased towards the com-
pressor side (side of the packaging with the barcode,
see the figure at the foot of the page).
Do not dispose of packaging materials in the environ-
ment or leave them within reach of children as they may
represent a hazard.

BRA2 - BRN2 EN 5
CHARACTERISTICS I A
H
P
L
BAR CODE
Hole Ø22
The BRA2 and BRN2 appliances are air-water units operat-
ing on R-410A and refrigerant are suitable for outdoor instal-
lation. The units are CE marked, as established by the EU
directives, including the latest amendments, and the corre-
sponding approximated national legislation.
They are factory tested and on site installation is limited to
water and electrical connections.
10
9
5
6
4
3
2
1
9
11
7
13
14
8
12
15 1 Electrical panel
2 Control panel
3 Heat exchanger installation side
4 Low pressure switch
5 High pressure switch
6 Scroll compressor
7 Filter
8 Thermostatic valve
9 Centrifugal fan
10 Heat exchanger external side
11 Pump (accessory)
12 Liquid receiver (BRN2 only)
13 Expansion tank
(models WITH HYDRONIC UNIT only)
14 Reversing valve (BRN2 only)
15 Fan board
BRA2 Dimensions and weight with standard packaging
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
Dimension L mm 970 970 970 970 970 970
Dimension P mm 660 660 660 660 660 710
Dimension H mm 840 1140 1140 1440 1440 1590
Weight Kg 125 140 145 190 210 220
BRN2 Dimensions and weight with standard packaging
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
Dimension L mm 970 970 970 970 970 970
Dimension P mm 660 660 660 660 660 710
Dimension H mm 840 1140 1140 1440 1440 1590
Weight Kg 135 150 155 205 225 235
BRA2 Dimensions and weight with wooden crate
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
Dimension L mm 1070 1070 1070 1070 1070 1070
Dimension P mm 760 760 760 760 760 810
Dimension H mm 890 1190 1190 1490 1490 1640
Weight difference Kg 150 170 175 225 245 265
BRA2 Dimensions and weight with wooden crate
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
Dimension L mm 1070 1070 1070 1070 1070 1070
Dimension P mm 760 760 760 760 760 810
Dimension H mm 890 1190 1190 1490 1490 1640
Weight difference Kg 160 180 185 240 260 280

600
W1 W2
W4 W3
900
D
C
=E=
A
400
400*
B
400
* For installation with open outlet, the
minimum distance is increased from
400mm to 1500mm
BRA2 - BRN2 EN
6
DISEGNI DIMENSIONALI I
HYDRAULIC CONNECTIONS I A
The choice and installation of components is the responsibil-
ity of the installer who should follow good working practice
and current legislation. Before connecting the pipes, make
sure they do not contain stones, sand, rust, dross or other
foreign bodies which might damage the unit. Construction of
a bypass is recommended to enable the pipes to be washed
through without having to disconnect the unit (see drain
valves). The connection piping should be supported in such
a way as to avoid it weighing on the unit. It is recommended
that the following devices are installed in the water circuit of
the evaporator:
1. Two pressure gauges with a suitable scale (inlet and outlet).
2. Two vibration damper joints (inlet and outlet).
3. Two gate valves (normal in inlet and calibrating in outlet).
4. A flow switch on the unit outlet to the system circuit (com-
pulsory). The flow switch must be calibrated by the
installer to a value equal to 70% of rated flow.
5. Due termometri (in ingresso e in uscita).
6. An intake filter must be installed as close as possible to
the evaporator and positioned to allow easy access for
routine maintenance. 500 micron filter
7. All the pipes must be insulated with suitable material to pre-
vent the formation of condensate and heat loss. The insu-
lating material must be a vapour barrier. Make sure that the
control and shut-off devices protrude from the insulation.
8. At the lowest points in the system, install drain valves for
easy emptying.
9. At the highest points in the system, install automatic or
manual air vent valves.
Failure to install the flow switch will mean the heat exchang-
er is not protected in the event of no flow of liquid.
Climaveneta cannot be held liable for any damage to the
unit and/or the system following the failure to install these
devices or the filter.
The correct operation of the components that help ensure
the safety of the appliance and the system should be
checked regularly.
Specifically, this involves cleaning the filters and checking
the operation of the flow switches installed.
Water flow to the chiller unit must conform to the values
shown in the section on “General Technical Data”.
The flow of water must be maintained constant during oper-
ation.
The water content of the unit must be such as to avoid dis-
turbing operation of the refrigerant circuits.
Dimension 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
A 900 900 900 900 900 900
B 640 940 940 1240 1240 1390
C 580 580 580 580 580 630
D 320 320 320 320 320 370
E 580 580 580 580 580 580
Weight Distribution BRA2 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
W1 30 35 36 48 54 57
W2 11 12 13 17 19 20
W3 23 26 27 36 40 42
W4 41 47 49 64 72 76
TOT 105 120 125 165 185 195
Weight Distribution BRN2 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
W1 33 38 39 52 58 61
W2 12 13 14 18 20 21
W3 25 28 30 40 44 46
W4 45 51 53 70 78 82
TOT 115 130 135 180 200 210

BRA2 - BRN2 EN 7
Minimum system water content
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
Minimum water content BRA2 l 18 21 24 31 36 44
Minimum water content BRN2 l 25 35 40 50 55 65
Expansion vessel size
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
Expansion vessel BRA2 l 2 2 2 2 2 2
Expansion vessel BRN2 l 2 2 2 2 2 5
Safety valve calibration
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T
Safety valve l 6 6 6 6 6 6
FACTORY CONNECTED INSTALLER CONNECTIONS
UTILITY
RETURN
UTILITY
OUTLET
12
12
14
14
2
10 24
3
5
11
6
1
15
15
7
15
8
12
13
System water circuit connection diagram, BRA2 version WITHOUT HYDRONIC KIT
1 PRESSURE GAUGE
2 VIBRATION-ISOLATING JOINT
3 SHUT-OFF VALVE
4 CALIBRATING VALVE
5 FLOW SWITCH
6 THERMOMETER
7 CIRCULATOR PUMP
8 SAFETY VALVE
9 EXPANSION VESSEL
10 MESH FILTER
11 FILL/TOP-UP
12 TEMPERATURE PROBE
13 DIFFERENTIAL PRESSURE
SWITCH
14 DRAIN/CHEMICAL WASHING
VALVE
15 SYSTEM VENT
FACTORY CONNECTED INSTALLER CONNECTIONS
UTILITY
RETURN
UTILITY
OUTLET
12
12
9
15 8
14
14
2
10 24
3
5
11
6
1
15
15
7
13
System water circuit connection diagram, BRA2 version WITHOUT HYDRONIC KIT
1 PRESSURE GAUGE
2 VIBRATION-ISOLATING JOINT
3 SHUT-OFF VALVE
4 CALIBRATING VALVE
5 FLOW SWITCH
6 THERMOMETER
7 CIRCULATOR PUMP
8 SAFETY VALVE
9 EXPANSION VESSEL
10 MESH FILTER
11 FILL/TOP-UP
12 TEMPERATURE PROBE
13 DIFFERENTIAL PRESSURE
SWITCH
14 DRAIN/CHEMICAL WASHING
VALVE
15 SYSTEM VENT
UTILITY
RETURN
UTILITY
OUTLET
FACTORY CONNECTED INSTALLER CONNECTIONS
12
12
15
12
13
14
10 24
11
1
15
14
23
5
6
15
7
8
System water circuit connection diagram, BRN2 version WITH HYDRONIC KIT
1 PRESSURE GAUGE
2 VIBRATION-ISOLATING JOINT
3 SHUT-OFF VALVE
4 CALIBRATING VALVE
5 FLOW SWITCH
6 THERMOMETER
7 CIRCULATOR PUMP
8 SAFETY VALVE
9 EXPANSION VESSEL
10 MESH FILTER
11 FILL/TOP-UP
12 TEMPERATURE PROBE
13 DIFFERENTIAL PRESSURE
SWITCH
14 DRAIN/CHEMICAL WASHING
VALVE
15 SYSTEM VENT

BRA2 - BRN2 EN
8
UTILITY
RETURN
UTILITY
OUTLET
FACTORY CONNECTED INSTALLER CONNECTIONS
12
12
15 87
13 14
23
5
6
15
14
10 24
11
1
15
System water circuit connection diagram, BRN2 version WITH HYDRONIC KIT
1 PRESSURE GAUGE
2 VIBRATION-ISOLATING JOINT
3 SHUT-OFF VALVE
4 CALIBRATING VALVE
5 FLOW SWITCH
6 THERMOMETER
7 CIRCULATOR PUMP
8 SAFETY VALVE
9 EXPANSION VESSEL
10 MESH FILTER
11 FILL/TOP-UP
12 TEMPERATURE PROBE
13 DIFFERENTIAL PRESSURE
SWITCH
14 DRAIN/CHEMICAL WASHING
VALVE
15 SYSTEM VENT
Must be provided with a filling/top-up system connected
to the return line and a drain cock in the lowest part of
the installation.
Installations containing antifreeze or covered by spe-
cific legislation must be fitted with water circuit discon-
nectors.
The manufacturer is not liable for obstruction, breakage
or noise resulting from the failure to install filters or
vibration dampers.
Particular types of water used for filling or topping up
must be treated with appropriate treatment systems.
For reference values, see the table.
Risk of freezing
The unit must be prevented from freezing at outside air tem-
peratures around 0°C.
The following are recommended:
• use suitable percentages of antifreeze (see “Ethylene gly-
col solutions”)
• protect the piping with heating sheaths,
• empty the system, making sure no water remains at the
lowest points in the circuit or there are closed valves
where water may stagnate.
It is recommended to use non-toxic food grade antifreeze,
compliant with the standards in force in the countries where
the unit is used, if domestic hot water production is also fea-
tured.
The antifreeze used must be corrosion inhibited and com-
patible with the water circuit components.
Ethylene glycol solutions
Water and ethylene glycol solutions used as a heat carrier in
the place of water reduce the performance of the unit.
Multiply the performance figures by the values given in the
following table.
The heat pumps must be fitted with a filling/top-up sys-
tem connected to the return line and a drain valve in the
lowest part of the system.
Systems containing antifreeze or covered by specific
legislation must be fitted with low-loss headers.
cPf
cQ
cdp
0
1
1
1
12%
0,985
1,02
1,07
20%
0,98
1,04
1,11
28%
0,974
1,075
1,18
35%
0,97
1,11
1,22
40%
0,965
1,14
1,24
0 -5 -10 -15 -20 -25
Freezing point (°C)
Percentage of ethylene glycol by weight
cPf: cooling capacity correction factor
cQ: flow rate correction factor
cdp: pressure drop correction factor
Water quality
The water used in the system and domestic hot water cir-
cuits must comply with the following characteristics:
PH 6-8
Electrical conductivity less than 200 mV/cm (25°C)
Chlorine ions less than 50 ppm
Sulphuric acid ions less than 50 ppm
Total iron less than 0.3 ppm
Alkalinity M less than 50 ppm
Total hardness less than 50 ppm
Sulphur ions none
Ammonia ions none
Silicon ions less than 30 ppm

9
BRA2 - BRN2 EN
Condensate drain
In heating mode the unit produces a significant quantity of
condensate, which must be suitably drained.
Proceed as follows:
• Connect the unit condensate drain
• Make sure the drain hose has a incline of at least 2 cm/m,
without obstructions or choking.
• Connect the condensate drain hose to a rainwater drain.
Do not connect to the sewage system as odours may be
sucked up if the water in the drain trap evaporates.
• After connecting, check correct drainage of the conden-
sate by pouring water into the pan.
• If necessary, suitably insulate the condensate drain hose.
• Condensate drainage must not cause problems to objects
or people.
• If the outside air temperature is less than 0°C, the conden-
sate may freeze.
Use hot wires on the condensate drain hose downstream of
the unit to protect against frost.
C
AB
Safety valve
D
OUT
IN
C
AB
D
OUT
IN
Safety valve
BRA2 BRN2
Dimensions 0021 0025-0031 0041-0051 0061
A mm 72 372 431 581
B mm 516 516 757 757
C mm 62 62 62 62
D* mm 65 65 65 65
Water connections in/out, male Ø 1” 1” 1”1/4 1”1/4
*D Safety valve connector position, only on the models with hydronic kit
SIZE AND POSITIONING OF CONNECTIONS, BRA2 AND BRN2
Fouling factors
The performance data given refer to conditions with clean
evaporator plates (fouling factor = 1).
For different fouling factors, multiply the figures in the perfor-
mance tables by the coefficient given in the following table.
f1: capacity correction factor
fk1: compressor power input correction factor
fx1: total power input correction factor
4,4 x 10-5
0,86 x 10-4
1,72 x10-4
-
0,96
0,93
-
0,99
0,98
-
0,99
0,98
Fouling factors
(m2°C/W) f1
Evaporator
fk1 fx1

10 BRA2 - BRN2 EN
FILLING THE SYSTEM
- Before filling, check that the system drain valve is closed.
- Open all system and terminal air vents.
- Open system shut off valves.
- Start filling by slowly opening the system water fill cock
outside the unit.
- When water begins to leak out of the terminal air vent
valves, close them and continue filling until the pressure
gauge indicates a pressure of 1.5 bar.
The system must be filled to a pressure of between 1
and 2 bars.
It is recommended that this operation be repeated after
the unit has been operating for a number of hours. The
pressure of the system should be checked regularly and
if it drops below 1 bar, the water content should be
topped-up.
Check the tightness of the joints.
EMPTYING THE SYSTEM
- Before emptying, place the mains switch in the “off” posi-
tion.
- Make sure the system fill/top-up water cock is closed.
- Open the drain cock outside the unit and all the system
and terminal air vent valves.
If the fluid in the circuit contains antifreeze, it should
not be allowed to drain freely, as it is pollutant.It should
be collected for possible reuse.When draining after heat
pump operation, take care as the water may be hot (up
to 50°).

BRA2 - BRN2 EN 11
AIR DUCTING I
The BRA2-BRN2 models are designed for indoor and out-
door installation. The cooling air outlet can be ducted to the
outside
Ducting the air outlet
The air outlet ducting connection has the following charac-
teristics.
A
B
A
B
C
GLMNO
HI
D
EF
A
B
C
GLMN O
HI
D
EF
A
B
C
GLM
I
EF
A
B
C
GLM
I
EF
The length of the outlet ducts must be established by
qualified personnel, considering the performance of the
fan shown in the table "General technical data"
Suitable measures should be taken to avoid the bypass
of air between the outlet and intake.
For the heat pump appliances, the section of ducting
inside the environment must be suitably insulated.
Use vibration damper joints on the duct fittings.
The outlet is supplied as standard on the side; for sizes
0021 - 0031 only, the air outlet can be turned from the
side to the top position
Model 0061 Model 0041 - 0051 Model 0025 - 0031 Model 0021
BRA2 - BRN2 0021 0025 0031 0041 0051 0061
A mm 203 203 203 203 203 203
B mm 640 900 900 1240 1240 1390
C mm 486 556 556 521 521 521
D mm - - - 521 521 521
E mm 13 18 18 18,5 18,5 18,5
F mm 18 18 18 18 18 18
G mm 53 218 218 81,5 81,5 104
H mm - - - 11,5 11,5 121,5
I mm 62 127 127 27 27 52
L mm 19,5 19,5 19,5 19,5 19,5 19,5
M mm 19,5 19,5 19,5 19,5 19,5 19,5
N mm - - - 19,5 19,5 19,5
O mm - - - 19,5 19,5 19,5

The appliance is factory fitted with the air outlet in position A
(side).
To move it to position B (top) for model 0021.
- Undo the fastening screws and remove the fan holder cov-
er P on the air outlet collar.
- Unscrew the four fastening bolts and remove the air outlet
collar.
- Turn the air outlet collar 90° clockwise and fasten the four
bolts that were removed previously.
- Replace the fan holder cover P with the fan fitted and
tighten the fastening screws.
To move it to position B (top) for models 0025 - 0031.
- Undo the fastening screws and remove the protection grill.
- Undo the fastening screws and remove the closed panel F.
- Invert the protection grid G with the panel F.
- Tighten the fastening screws..
P
F
G
BRA2 - BRN2 EN
12

BRA2 - BRN2 EN 13
ELECTRICAL CONNECTIONS I A
The BRA2 and BRN2 units leave the factory already wired,
and require the installation of an omnipolar thermal overload
switch, a lockable mains disconnecting switch for the con-
nection to the mains power supply, and the connection of
the flow switch to the corresponding terminals. All the above
operations must be carried out by qualified personnel
in compliance with the legislation in force.
For all electrical work, refer to the electrical wiring diagrams
in this manual.You are also recommended to check:
- that the characteristics of the mains electricity supply are
adequate for the absorptions indicated in the electrical
characteristics table below, also bearing in mind
Power to the unit must be turned on only after installa-
tion work (hydraulic and electrical) has been completed.
All electrical connections must be carried out by quali-
fied personnel in accordance with legislation in force in
the country concerned.
Respect instructions for connecting phase, neutral and
earth conductors.
The power line should be fitted upstream with a suitable
device to protect against short-circuits and leakage to
earth, isolating the installation from other equipment.
Voltage must be within a tolerance of ±10% of the rated
power supply voltage for the unit (for three phase units,
the unbalance between the phases must not exceed
2%). If these parameters are not respected, contact the
electricity supply company.
For electrical connections, use double insulation cable
in conformity with current legislation in the country con-
cerned.
An omnipolar thermal overload switch and a lockable mains
disconnecting switch, in compliance with the CEI-EN stan-
dards (contact opening of at least 3mm), with adequate
switching and residual current protection capacity based on
the electrical data table shown below,must be installed as
near as possible to the appliance.
The devices on the unit must be lockable.
An efficient earth connection is obligatory. Failure to
earth the appliance absolves the manufacturer of all lia-
bility for damage.
In the case of three phase units, ensure the phases
are connected correctly.
Do not use water pipes to earth the unit.
ELECTRICAL DATA, BRA2 AND BRN2 WITHOUT HYDRONIC KIT
F.L.I. Maximum power input
F.L.A. Maximum current input
S.A. Start-up current
S.A. LIM Peak current with peak limiter
Maximum values for sizing the protection switches and power supply cables
Size Power supply Maximum values Fuses (5x20T 250V)
(V-Ph-Hz) FLA [A] FLI [kW] SA [A] SA LIM [A] FU1 FU2 FU3
BRA2 - BRN2 0021 230-1N-50 18,4 3,42 63,4 29,4 4A 3,15A 2A
BRA2 - BRN2 0025 230-1N-50 21,4 4,19 84,4 39,4 4A 3,15A 2A
BRA2 - BRN2 0031 230-1N-50 25,4 5,09 99,4 46,4 4A 3,15A 2A
BRA2 - BRN2 0041 230-1N-50 29,4 6,34 134,7 49,7 4A 6,3A 2A
BRA2 - BRN2 0021 400-3N-50 7,9 3,42 34,4 20,4 4A 3,15A 2A
BRA2 - BRN2 0025 400-3N-50 8,4 3,95 37,4 21,4 4A 3,15A 2A
BRA2 - BRN2 0031 400-3N-50 10,4 4,76 50,4 28,4 4A 3,15A 2A
BRA2 - BRN2 0041 400-3N-50 12,4 6,36 68,7 39,7 4A 6,3A 2A
BRA2 - BRN2 0051 400-3N-50 14,2 6,42 68,7 39,7 4A 6,3A 2A
BRA2 - BRN2 0061 400-3N-50 17,4 7,75 78,7 45,7 4A 6,3A 2A
ELECTRICAL DATA, BRA2 AND BRN2 WITH HYDRONIC KIT
F.L.I. Maximum power input
F.L.A. Maximum current input
S.A. Start-up current
S.A. LIM Peak current with peak limiter
Maximum values for sizing the protection switches and power supply cables
Size Power supply Maximum values Fuses (5x20T 250V)
(V-Ph-Hz) FLA [A] FLI [kW] SA [A] SA LIM [A] FU1 FU2 FU3
BRA2 - BRN2 0021 230-1N-50 19,0 3,50 64,0 30,0 1,25A 1,25A 2A
BRA2 - BRN2 0025 230-1N-50 22,0 4,27 92,2 40,0 1,25A 3,15A 2A
BRA2 - BRN2 0031 230-1N-50 26,0 5,17 100,0 47,0 1,25A 3,15A 2A
BRA2 - BRN2 0041 230-1N-50 30,3 6,47 135,7 50,7 1,25A 6,3A 2A
BRA2 - BRN2 0021 400-3N-50 8,5 3,50 35,0 21,0 1,25A 1,25A 2A
BRA2 - BRN2 0025 400-3N-50 9,0 4,03 38,0 22,0 1,25A 3,15A 2A
BRA2 - BRN2 0031 400-3N-50 11,0 4,84 51,0 29,0 1,25A 3,15A 2A
BRA2 - BRN2 0041 400-3N-50 13,3 6,49 69,7 40,7 1,25A 6,3A 2A
BRA2 - BRN2 0051 400-3N-50 15,1 6,55 69,7 40,7 1,25A 6,3A 2A
BRA2 - BRN2 0061 400-3N-50 18,3 7,88 79,7 46,7 1,25A 6,3A 2A

BRA2 - BRN2 EN
14
MAINS POWER SUPPLY CONNECTIONS I A
• Before connecting the unit to the power supply, makes
sure that switch QF1 is open, suitably padlocked and
marked.
• Remove the inspection panel by unscrewing the screws.
• Use cable gland Afor the main electrical power cable and
cable gland Bfor other external cables to be connected by
the installer.
• Identify the terminals used for electrical connections on
the layout drawing shown in this manual.
• Make the connections as shown on the wiring diagram
enclosed with the product.
• Replace the covers on the electrical panel and the closing
panel.
• Make sure that all the covers removed to make the electri-
cal connections have been replaced before powering up
the unit.
• Position the main switch QF1 (outside the unit) in the “ON”
position.
A
B
INSTALLER CONNECTIONS I A
All terminals referred to in the explanations below are to be
found on the terminal block inside the electrical panel and
described as “installer terminals” (see the wiring diagram
enclosed with the product).
REMOTE ON/OFF (SA1)
To use a remote on/off device, an external contactor must
be connected to installer terminals 14 and 15, setting para-
meter CL42 to -1 (CL42=-1).
For timed operation, connect a daily or weekly timer
between terminals 14 and 15.
REMOTE ALARM (RD1)
For remote display of unit shut-down, an audible or visual
alarm warning device can be connected between terminals
12 and 13.
Connect the phase to terminal 13 and the alarm signal
device between terminal 13 and the neutral (maximum load
applicable 500 mA at 24 V).
REMOTE COOLING/HEATING CHANGEOVER (SA2)
To use a remote cooling/heating changeover device, con-
nect the contact of the device to installer terminals 16 and
17. To activate the device, proceed as follows:
- From the HSW15 control panel select parameter CL43
and set it to the value +3 (contact closed = cooling, con-
tact open = heating) or -3 (contact closed = heating, con-
tact open = cooling)
COMPRESSOR ON SIGNAL (GN1)
For remote display of compressor operating status, an audi-
ble or visual alarm warning device can be connected
between terminals 10 and 11. Connect the phase to terminal
11 and the signal device between terminal 10 and the neu-
tral.

15
BRA2 - BRN2 EN
OUTSIDE AIR PROBE (BT3) (Accessory)
The outside air probe allows the system water temperature
set point to be compensated during heating or cooling opera-
tion.
Installation instructions
The outside air probe must be installed:
• outside of the home
• not in direct sunlight, away from flue gas discharges, air
outlets, or doors and windows.
• on a perimeter wall facing north/north-west
• at a minimum height of 2.5 metres above the ground or at
most half way up the house.
H
H
2
/
1
N
N-W
m5,2nim
Mounting method:
• Open the cover of the sensor.
• Attach a probe to the wall and the correct position as
described above.
• For the electrical connections see “Connection diagram”.
• Re-place the cover of the sensor.
TECHNICAL DATA
Sensing element NTC 10Kohm ± 1% (25°C)
Degree of protection IP65
Perm. ambient / carriage temperatur e -50°C...+100°C
Measuring range -50°C...+100°C
Materials PA 15% GK, Colour RAL 9010
12
20 21
BT3
REMOTE KEYPAD KIT (A5) (Accessory)
The remote keypad kit can be used to display all unit func-
tions and access the parameters of the electronic board
from a point located at some distance from the unit itself.
It consists of a remote control module.
To install the kit, proceed as follows:
- access the unit’s electrical panel after having disconnect-
ed the power supply;
- connect the remote control module with 3 wires to termi-
nals 22, 23 and 24 on the installer terminal block:
- terminal 22 connected to the GND terminal on the module;
- terminal 23 connected to the Signal terminal on the mod-
ule;
- terminal 24 connected to the +12V DC terminal on the
module;
FLOW SWITCH CONNECTION (F3)
The system flow switch must be connected to terminals 18
and 19.
If this is not connected, the unit will not be able to operate
and the controller will display alarm code ER20 (see "Dis-
playing alarms").

BRA2 - BRN2 EN
16
GENERAL TECHNICAL DATA I A
BRA2 without hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061
Cooling capacity 1 [kW] 7,71 9,50 11,5 15,0 7,70 9,0 11,60 15,7 17,9 20,5
Power consumption 1 [kW] 2,29 2,79 3,80 4,60 2,22 2,59 3,55 4,79 5,19 6,03
COP 1 3,37 3,41 3,03 3,26 3,47 3,47 3,27 3,28 3,45 3,40
Cooling capacity 2 [kW] 5,74 7,03 8,68 11,4 5,72 7,10 8,76 11,8 13,3 15,6
Power consumption 2 [kW] 2,22 2,68 3,60 4,33 2,17 2,54 3,32 4,47 5,00 5,57
EER 2 2,59 2,62 2,41 2,63 2,63 2,80 2,64 2,64 2,66 2,80
ESEER 1 3,11 3,22 2,98 3,06 3,21 3,45 3,16 3,13 3,02 3,26
Flow-rate 1 m3/h 1,33 1,63 1,98 2,58 1,32 1,55 2,00 2,70 3,08 3,53
Pressure drop 1 kPa 13 15 16 31 13 14 16 34 36 35
Flow-rate 2 m3/h 0,99 1,21 1,49 1,96 0,98 1,22 1,51 2,03 2,29 2,68
Pressure drop 2 kPa 7 8 9 18 7 8 9 19 20 20
Sound power 4 [dBA] 75 75 75 77 75 75 75 77 77 77
Power supply V-N/Ph-Hz 230-1N-50 400-3N-50
No. of compressors 1 1 1 1 1 1 1 1 1 1
No. of circuits 1 1 1 1 1 1 1 1 1 1
Type of compressor Scroll
No. of fans 1 1 1 2 1 1 1 2 2 2
Air flow-rate 1 [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350
No. of system heat exchangers 1 1 1 1 1 1 1 1 1 1
Type of system heat exchanger PLATE
System water heat exchanger content l 2 2 2 2 2 2 2 2 2 3
BRA2 with hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061
Cooling capacity 1 [kW] 7,76 9,56 11,6 15,1 7,75 9,1 11,70 15,8 18,0 20,7
Power consumption 1 [kW] 2,21 2,69 3,71 4,48 2,14 2,50 3,45 4,66 5,04 5,91
COP 1 3,51 3,55 3,13 3,37 3,62 3,62 3,39 3,39 3,57 3,50
Cooling capacity 2 [kW] 5,77 7,08 8,73 11,5 5,75 7,15 8,81 11,9 13,4 15,7
Power consumption 2 [kW] 2,16 2,61 3,52 4,26 2,11 2,47 3,24 4,41 4,91 5,45
EER 2 2,67 2,71 2,48 2,70 2,72 2,90 2,72 2,70 2,73 2,88
ESEER 1 3,21 3,35 3,07 3,14 3,33 3,59 3,27 3,23 3,11 3,37
Flow-rate 1 m3/h 1,33 1,64 2,00 2,60 1,33 1,56 2,01 2,72 3,10 3,56
Available pressure head 1 kPa 59 50 40 37 60 53 39 33 26 23
Flow-rate 2 m3/h 0,99 1,22 1,50 1,98 0,99 1,23 1,52 2,05 2,30 2,70
Available pressure head 2 kPa 72 66 59 51 72 66 59 50 49 47
Sound power [dBA] 75 75 75 77 75 75 75 77 77 77
Power supply V-N/Ph-Hz 230-1N-50 400-3N-50
No. of compressors 1 1 1 1 1 1 1 1 1 1
No. of circuits 1 1 1 1 1 1 1 1 1 1
Type of compressor Scroll
No. of fans 1 1 1 2 1 1 1 2 2 2
Air flow-rate [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350
No. of system heat exchangers 1 1 1 1 1 1 1 1 1 1
Type of system heat exchanger PLATE
System water heat exchanger content l 2 2 2 2 2 2 2 2 2 3
(1) outside air 35°C evaporator water IN/OUT 23/18°C
(2) outside air 35°C evaporator water IN/OUT 12/7°C
(3) maximum and minimum operating pressure refer to activation of the pressure switches
(4) sound power based on measurements performed in accordance with ISO 9614 and Eurovent 8/1
Performance in accordance with EN 14511:2013
(1) outside air 35°C evaporator water IN/OUT 23/18°C
(2) outside air 35°C evaporator water IN/OUT 12/7°C
(3) maximum and minimum operating pressure refer to activation of the pressure switches
(4) Sound power based on measurements performed in accordance with ISO 9614 and Eurovent 8/1
Performance in accordance with EN 14511:2013

17
BRA2 - BRN2 EN
GENERAL TECHNICAL DATA I A
BRN2 without hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061
Heating capacity 1 [kW] 6,76 8,37 10,5 12,9 6,73 8,3 10,00 13,4 14,8 17,3
Power consumption 1 [kW] 2,25 2,84 3,48 4,35 2,24 2,69 3,23 4,47 4,67 5,58
COP 1 3,01 2,95 3,01 2,97 3,01 3,08 3,10 2,99 3,17 3,10
Cooling capacity 2 [kW] 4,81 5,89 7,29 9,6 4,80 5,99 7,35 10,0 11,1 13,0
Power consumption 2 [kW] 1,96 2,39 3,27 3,81 1,92 2,27 2,99 3,95 4,42 4,95
EER 2 2,45 2,46 2,23 2,51 2,50 2,64 2,46 2,52 2,51 2,63
ESEER 1 3,07 3,05 2,87 3,03 3,09 3,29 2,99 3,09 2,85 3,11
Flow-rate 1 m3/h 1,16 1,44 1,80 2,22 1,16 1,43 1,72 2,30 2,55 2,98
Pressure drop 1 kPa 10 12 13 23 10 12 12 25 24 24
Flow-rate 2 m3/h 0,83 1,01 1,25 1,64 0,83 1,03 1,26 1,71 1,91 2,24
Pressure drop 2 kPa 5 6 6 13 5 6 6 14 14 14
Sound power 4 [dBA] 75 75 75 77 75 75 75 77 77 77
Power supply V-N/Ph-Hz 230-1N-50 400-3N-50
No. of compressors 1 1 1 1 1 1 1 1 1 1
No. of circuits 1 1 1 1 1 1 1 1 1 1
Type of compressor Scroll
No. of fans 1 1 1 2 1 1 1 2 2 2
Air flow-rate 1 [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350
No. of system heat exchangers 1 1 1 1 1 1 1 1 1 1
Type of system heat exchanger PIASTRE
System water heat exchanger content l 2 2 2 2 2 2 2 2 2 3
BRN2 with hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061
Heating capacity 1 [kW] 6,72 8,32 10,4 12,8 6,68 8,2 9,99 13,3 14,8 17,2
Power consumption 1 [kW] 2,18 2,75 3,38 4,22 2,17 2,61 3,14 4,38 4,57 5,46
COP 1 3,08 3,02 3,08 3,03 3,08 3,16 3,18 3,04 3,24 3,15
Cooling capacity 2 [kW] 4,83 5,93 7,33 9,6 4,82 6,03 7,39 10,0 11,2 13,1
Power consumption 2 [kW] 1,92 2,34 3,19 3,76 1,88 2,22 2,91 3,88 4,38 4,85
EER 2 2,51 2,53 2,30 2,56 2,56 2,72 2,54 2,58 2,56 2,70
ESEER 1 3,17 3,17 2,97 3,09 3,19 3,43 3,09 3,14 2,93 3,20
Flow-rate 1 m3/h 1,16 1,43 1,79 2,20 1,15 1,42 1,72 2,29 2,55 2,96
Available pressure head 1 kPa 66 58 48 46 66 58 51 44 44 40
Flow-rate 2 m3/h 0,83 1,02 1,26 1,65 0,83 1,04 1,27 1,72 1,93 2,25
Available pressure head 2 kPa 74 73 67 56 74 73 67 55 55 55
Sound power [dBA] 75 75 75 77 75 75 75 77 77 77
Power supply V-N/Ph-Hz 230-1N-50 400-3N-50
No. of compressors 1 1 1 1 1 1 1 1 1 1
No. of circuits 1 1 1 1 1 1 1 1 1 1
Type of compressor Scroll
No. of fans 1 1 1 2 1 1 1 2 2 2
Air flow-rate [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350
No. of system heat exchangers 1 1 1 1 1 1 1 1 1 1
Type of system heat exchanger PLATE
System water heat exchanger content l 2 2 2 2 2 2 2 2 2 3
(1) outside air 7°C; condenser water in/out 40/45°C
(2) outside air 35°C; evaporator water IN/OUT 12/7°C
(3) maximum and minimum operating pressure refer to activation of the pressure switches
(4) Sound power based on measurements performed in accordance with ISO 9614 and Eurovent 8/1
Performance in accordance with EN 14511:2013
(1) outside air 7°C; condenser water in/out 40/45°C
(2) outside air 35°C; evaporator water IN/OUT 12/7°C
(3) maximum and minimum operating pressure refer to activation of the pressure switches
(4) Sound power based on measurements performed in accordance with ISO 9614 and Eurovent 8/1
Performance in accordance with EN 14511:2013

18 BRA2 - BRN2 EN
OPERATING LIMITS U I A
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
-15 -10 -5 0 5 10 15 20
Outside air temperature [°C]
Water outlet temperature at evaporator [°C]
COOLING
Operating range in COOLING
Water temperature head min-max= 3-8 K
Water circuit pressure min-max= 1÷6 bars
Max storage temperature= 63°C
Maximum percentage of glycol= 40%
As standard, the unit is manufactured with operating parameters allowing water produced at the evaporator down to +5°C. If needing to produce
water down to -10°C, contact technical service.
OPERATION WITH
WATER-GLYCOL MIX
20
25
30
35
40
45
50
55
60
-15 -10 -5 0 5 10 15 20 25 30 35 40 45 50
Water outlet temperature at condenser [°C]
Outside air temperature [°C]
HEATING
Operating range in heating
Water temperature head min-max= 4-10 K
Water circuit pressure min-max= 1÷6 bars
Maximum water temperature at system heat exchanger water inlet +50°C
Max storage temperature= 63°C
Maximum percentage of glycol= 40%

BRA2 - BRN2 EN 19
U I A
PRESSURE DROP AND PRESSURE HEAD AVAILABLE TO SYSTEM I A
SYSTEM HEAT EXCHANGER PRESSURE DROP, UNIT WITHOUT HYDRONIC KIT
0
10
20
30
40
50
60
70
80
90
100
012345
Pressure drop [kPa]
System heat exchanger pressure drop
Water flow-rate [m3/h]
0021 0025 0041 0031
0051
0061
AVAILABLE PRESSURE HEAD, UNIT WITH HYDRONIC KIT
0
10
20
30
40
50
60
70
80
90
100
01234
Available pressure head [kPa]
Water flow-rate [m3/h]
Available pressure head
0025
0021 0031

BRA2 - BRN2 EN
20
U I A
PRESSURE DROP AND PRESSURE HEAD AVAILABLE TO SYSTEM I A
AVAILABLE PRESSURE HEAD, UNIT WITH HYDRONIC KIT
0
10
20
30
40
50
60
70
80
90
100
012345
Available pressure head [kPa]
Water flow-rate [m3/h]
Presión estática útil
00510041 0061
The pressure head refers to the value available to the system.
The pump installed on the unit, if the “hydronic kit” option is
purchased as an accessory, is a circulator pump with built-in
inverter, including water pressure transducer and micro-
processor to manage the following control modes adjust-
ment:
CONSTANT ΔP: the pressure differential between pump
suction and discharge is kept constant, pump speed
decreases progressively when the terminals close.
VARIABLE ΔP: the pressure differential reduces as flow-
rate decreases, to account for the lower pressure drop along
the piping running to the terminals (recommended for long
sections of piping)
The type of control can be set using the selector on the
pump body. As standard, the type of control is set to CON-
STANT ΔP.
CONSTANT ΔP
(standard setting)
VARIABLE ΔP