Mitsubishi Electric CLIMAVENETA BRAN2 0021M Operating instructions

Air/water chillers and heat pumps with
axial-fl w fans with and with ut pump
assemblies
EN
BRAT2 0021÷0121
BRAN2 0021÷0121
INSTALLATION, USER AND MAINTENANCE MANUAL

2BRAT2 - BRAN2 EN
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.
INDICEINDEX
General warnings 3
Waiver of liability 3
Fundamental safety rules 3
Receiving, handling and installing the 4
product
Characteristics 5
Dimensioned drawings 6
Water connections 6
Electrical connections 10
Mains power supply connections 12
Installer connections 12
General technical data 14
Operating limits 16
Pressure drop and pressure head available 17
to system
Checking and starting up the unit 19
LED and display 20
Displaying alarms 28
Peak limiter alarm signals 29
Operating characteristics 30
Shutting down for long periods 32
Routine maintenance 32
Special maintenance 32
Disposal 32
Troubleshooting 33
Useful information 35
U I A
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A
A
A
I A
I AU
U I A
UIA
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I A
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IU A
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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
BRAT2 - BRAN2 EN
GENERAL WARNINGS U I A
FUNDAMENTAL SAFETY RULES U I A
WAIVER OF LIABILITY 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.
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.
The BRAT/N2 0021÷0121 appliances are supplied with-
out the main switch.
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.

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 conden-
sate is drained using the drain hose supplied as standard.
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.
RECEIVING, HANDLING AND INSTALLING THE PRODUCT I A
4BRAT2 - BRAN2 EN
H
P
L
Barcode
(compressor side)
BRAT(N)2 0021÷0061: Ø 22mm
BRAT(N)2 0071÷0121: Ø 25mm
BRAT2 Dimensions and weight with standard packaging
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
Dimension L mm 970 970 970 970 970 970 1530 1530 1530 1530
Dimension P mm 480 480 480 480 480 530 650 650 650 650
Dimension H mm 840 1140 1140 1440 1440 1590 1400 1400 1900 1900
Weight Kg 100 115 120 145 165 175 260 265 340 345
BRAN2 Dimensions and weight with standard packaging
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
Dimension L mm 970 970 970 970 970 970 1530 1530 1530 1530
Dimension P mm 480 480 480 480 480 530 650 650 650 650
Dimension H mm 840 1140 1140 1440 1440 1590 1400 1400 1900 1900
Weight Kg 110 125 130 160 180 190 280 285 360 365
BRAT2 Dimensions and weight with wooden crate
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
Dimension L mm 1070 1070 1070 1070 1070 1070 1630 1630 1630 1630
Dimension P mm 580 580 580 580 580 630 750 750 750 750
Dimension H mm 890 1190 1190 1490 1490 1640 1450 1450 1950 1950
Weight difference Kg 120 140 145 175 195 215 305 310 395 400
BRAN2 Dimensions and weight with wooden crate
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
Dimension L mm 1070 1070 1070 1070 1070 1070 1630 1630 1630 1630
Dimension P mm 580 580 580 580 580 630 750 750 750 750
Dimension H mm 890 1190 1190 1490 1490 1640 1450 1450 1950 1950
Weight difference Kg 130 150 155 190 210 230 325 330 415 420

5
BRAT2 - BRAN2 EN
CHARACTERISTICS I A
1 Electrical panel
2 Control panel
3 Heat exchanger, side
4 Low pressure switch
5 High pressure switch
6 Scroll compressor
7 Filter
8 Thermostatic valve
9 Axial-flow fan
10 Heat exchanger, outdoor side
11 Pump (accessory)
12 Liquid receiver (only BRAN2)
13 Expansion vessel (models WITH HYDRONIC UNIT only)
14 Reversing valve (only BRAN2)
The BRAT(N)2 appliances are air-water units operating on
R-410A and refrigerant are suitable for outdoor installation.
The units are CE marked, as established by the EU direc-
tives, including the latest amendments, and the correspond-
ing approximated national legislation.
They are factory tested and on site installation is limited to
water and electrical connections.
10
9
8
7
654
3
21
8
11
12
13
14
10
9
5
6
4
32
1
8
11
7
13
14
9
12
10
9
8
7
654
3
21
8
11
12
13
14
0021÷0031
0041÷0091 0101÷0121

DIMENSIONED DRAWINGS I
6BRAT2 - BRAN2 EN
600
W1 W2
W4 W3
900
D
B
C
=E
A
=
400
WATER 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. Construction of a bypass is recom-
mended 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.
The following devices must be installed on the water circuit:
1. Two pressure gauges with a suitable scale (intake and
outlet);
2. Two vibration damper joints (intake and outlet);
3. Two shut off valves (normal in intake and calibrating in out-
let);
4. A flow switch on the unit outlet to the system circuit
(compulsory). The flow switch must be calibrated by
the installer to a value equal to 70% of rated flow.
5. Two thermometers (intake and outlet).
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
mesh.
7. All the pipes must be insulated with suitable material to
prevent the formation of condensate and heat loss. The
insulating 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 0071T 0091T 0101T 0121T
A mm 900 900 900 900 900 900 1450 1450 1450 1450
B mm 640 940 940 1240 1240 1390 1200 1200 1700 1700
C mm 370 370 370 370 370 420 550 550 550 550
D mm 320 320 320 320 320 370 497 497 497 497
E mm 580 580 580 580 580 580 1477 1477 1477 1477
Weight distribution BRAT2
0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
W1 kg 33 39 41 49 57 60 83 84 110 111
W2 kg 12 14 14 18 20 22 42 43 54 55
W3 kg 11 13 14 16 19 20 39 40 51 52
W4 kg 29 34 36 42 49 53 81 83 105 107
Total in operation kg 85 100 105 125 145 155 245 250 320 325
Weight distribution BRAN2
0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
W1 kg 37 43 45 55 62 66 92 93 119 120
W2 kg 13 15 16 20 23 24 43 44 55 56
W3 kg 13 15 15 17 21 22 40 41 52 53
W4 kg 32 37 39 48 54 58 90 92 114 116
Total in operation kg 95 110 115 140 160 170 265 270 340 345

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
7
BRAT2 - BRAN2 EN
Minimum system water content
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
Minimum water content BRAT2 l 18 21 24 31 36 44 55 65 78 94
Minimum water content BRAN2 l 25 35 40 50 55 65 80 90 110 130
Expansion vessel size
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
Expansion vessel BRAT2 l 2 2 2 2 2 2 5 5 5 5
Expansion vessel BRAN2 l 2 2 2 2 2 5 5 5 8 8
Safety valve calibration
Size 0021M-T 0025M-T 0031M-T 0041M-T 0051T 0061T 0071T 0091T 0101T 0121T
Safety valve l 6 6 6 6 6 6 6 6 6 6
System water circuit connection diagram, BRAT2 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, BRAN2 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, BRAT2 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

8BRAT2 - BRAN2 EN
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, BRAN2 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
The chillers must be provided with a filling/top-up sys-
tem 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
BRAT2 - BRAN2 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
SIZE AND POSITIONING OF CONNECTIONS, BRAT2 AND BRAN2
BRAT2 BRAN2
Dimensions 0021 0025-0031 0041-0051 0061 0071-0091 0101-0121
A mm 72 372 431 581 374 696
B mm 516 516 757 757 757 757
C mm 62 62 62 62 94 94
D* mm 65 65 65 65 65 65
Water connections in/out, male Ø 1” 1” 1”1/4 1”1/4 1”1/4 1”1/4
*D Safety valve connector position, only on the models with hydronic kit
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 BRAT2 - BRAN2 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°).
ELECTRICAL CONNECTIONS I A
The BRAT2 and BRAN2 leave the factory already wired,
and require the installation of a circuit breaker, a lockable
mains disconnect switch for the connection 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. It is also recommended to check that:
- The characteristics of the mains electricity supply are ade-
quate for the power ratings indicated in the electrical spec-
ifications below, also bearing in mind the possible use of
other equipment at the same time.
Power to the unit must be turned on only after installa-
tion work (water and electrical) has been completed.
All the electrical connections must be performed by
qualified personnel according to the relevant standards
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 elec-
tricity supply company.For electrical connections, use
double insulation cable in conformity with legislation in
force in the country concerned.
A circuit breaker and a lockable mains disconnect
switch, in compliance with the CEI-EN standards
(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.
The manufacturer cannot be held liable for any damage
caused by the failure to correctly earth the unit.
In the case of three phase units, ensure the phases
are connected correctly.
Do not use water pipes to earth the unit.

11
BRAT2 - BRAN2 EN
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
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
ELECTRICAL DATA, BRAT2 AND BRAN2 WITHOUT HYDRONIC KIT
ELECTRICAL DATA, BRAT2 AND BRAN2 WITH HYDRONIC KIT
Size Power supply Maximum values Fuses (5x20T 250V)
(V-Ph-Hz) FLA [A] FLI [kW] SA [A] SA LIM [A] FU1 FU2 FU3 FU4
BRAT2 - BRAN2 0021 230-1N-50 16,6 3,1 61,6 27,6 4A 1,25A 2A -
BRAT2 - BRAN2 0025 230-1N-50 19,6 3,8 82,6 37,6 4A 1,25A 2A -
BRAT2 - BRAN2 0031 230-1N-50 23,6 4,7 97,6 44,6 4A 1,25A 2A -
BRAT2 - BRAN2 0041 230-1N-50 27,6 6,0 131,3 46,3 4A 1,6A 2A -
BRAT2 - BRAN2 0021 400-3N-50 6,1 3,1 32,6 18,6 4A 1,25A 2A -
BRAT2 - BRAN2 0025 400-3N-50 6,6 3,6 35,6 19,6 4A 1,25A 2A -
BRAT2 - BRAN2 0031 400-3N-50 8,6 4,4 48,6 26,6 4A 1,25A 2A -
BRAT2 - BRAN2 0041 400-3N-50 10,6 6,0 65,3 36,3 4A 1,6A 2A -
BRAT2 - BRAN2 0051 400-3N-50 12,4 6,1 65,3 36,3 4A 1,6A 2A -
BRAT2 - BRAN2 0061 400-3N-50 15,6 7,4 75,3 42,3 4A 1,6A 2A -
BRAT2 - BRAN2 0071 400-3N-50 16,8 8,8 102,3 57,3 4A 1,6A 1A 1A
BRAT2 - BRAN2 0091 400-3N-50 18,8 10,0 129,3 71,3 4A 1,6A 1A 1A
BRAT2 - BRAN2 0101 400-3N-50 22,2 11,7 140,9 77,9 4A 3,15A 1A 1A
BRAT2 - BRAN2 0121 400-3N-50 31,6 14,7 141,9 78,9 4A 3,15A 1A 1A
Size Power supply Maximum values Fuses (5x20T 250V)
(V-Ph-Hz) FLA [A] FLI [kW] SA [A] SA LIM [A] FU1 FU2 FU3 FU4
BRAT2 - BRAN2 0021 230-1N-50 17,2 3,1 62,2 28,2 1,25 1,25A 2A -
BRAT2 - BRAN2 0025 230-1N-50 20,2 3,9 83,2 38,2 1,25 1,25A 2A -
BRAT2 - BRAN2 0031 230-1N-50 24,2 4,8 98,2 45,2 1,25 1,25A 2A -
BRAT2 - BRAN2 0041 230-1N-50 28,6 6,1 132,2 47,2 1,25 1,6A 2A -
BRAT2 - BRAN2 0021 400-3N-50 6,7 3,1 33,2 19,2 1,25 1,25A 2A -
BRAT2 - BRAN2 0025 400-3N-50 7,2 3,7 36,2 20,2 1,25 1,25A 2A -
BRAT2 - BRAN2 0031 400-3N-50 9,2 4,5 49,2 27,2 1,25 1,25A 2A -
BRAT2 - BRAN2 0041 400-3N-50 11,6 6,1 66,2 37,2 1,25 1,6A 2A -
BRAT2 - BRAN2 0051 400-3N-50 13,4 6,2 66,2 37,2 1,25 1,6A 2A -
BRAT2 - BRAN2 0061 400-3N-50 16,6 7,5 76,2 43,2 1,25 1,6A 2A -
BRAT2 - BRAN2 0071 400-3N-50 18,1 9,0 103,6 58,6 1,6 1,6A 1A 1A
BRAT2 - BRAN2 0091 400-3N-50 20,1 10,2 130,6 72,6 1,6 1,6A 1A 1A
BRAT2 - BRAN2 0101 400-3N-50 23,5 12,0 142,2 79,2 1,6 3,15A 1A 1A
BRAT2 - BRAN2 0121 400-3N-50 32,9 15,0 143,2 80,2 1,6 3,15A 1A 1A

12 BRAT2 - BRAN2 EN
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.

13
BRAT2 - BRAN2 EN
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").
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

U
GENERAL TECHNICAL DATA I A
(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
14 BRAT2 - BRAN2 EN
BRAT2 without hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061 0071 0091 0101 0121
Cooling capacity 1 [kW] 7,71 9,50 11,5 15,0 7,70 9,0 11,64 15,7 17,9 20,5 25,1 28,4 35,1 40,6
Power consumption 1 [kW] 2,18 2,71 3,73 4,44 2,11 2,51 3,49 4,61 4,97 5,87 7,53 9,14 9,95 12,9
EER 1 3,54 3,50 3,09 3,39 3,65 3,58 3,34 3,40 3,61 3,50 3,34 3,11 3,53 3,15
Cooling capacity 2 [kW] 5,74 7,03 8,68 11,4 5,72 7,10 8,76 11,8 13,3 15,6 19,0 21,6 26,6 31,5
Power consumption 2 [kW] 2,10 2,60 3,53 4,16 2,06 2,46 3,24 4,32 4,78 5,38 6,81 8,24 9,08 11,9
EER 2 2,73 2,70 2,46 2,74 2,77 2,89 2,70 2,74 2,79 2,89 2,79 2,62 2,93 2,64
ESEER 1 3,31 3,32 3,06 3,21 3,43 3,57 3,26 3,30 3,18 3,39 3,25 3,08 3,42 3,11
Flow-rate 1 m3/h 1,33 1,63 1,98 2,59 1,32 1,55 2,00 2,70 3,09 3,53 4,32 4,89 6,04 6,99
Pressure drop 1 kPa 13 15 16 31 13 14 16 34 36 35 39 39 41 42
Flow-rate 2 m3/h 0,99 1,21 1,49 1,96 0,98 1,22 1,51 2,04 2,29 2,68 3,27 3,71 4,57 5,42
Pressure drop 2 kPa 7 8 9 18 7 8 9 19 20 20 22 22 23 25
Sound power 4 [dBA] 66 66 66 69 66 66 66 69 69 69 74 74 76 76
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 1 1 1 1
No. of circuits 1 1 1 1 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 2 2 3 3
Air flow-rate 1 [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350 6800 6800 10200 10200
No. of system heat exchangers 1 1 1 1 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 3 3 4 4
BRAT2 with hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061 0071 0091 0101 0121
Cooling capacity 1 [kW] 7,76 9,56 11,6 15,1 7,75 9,1 11,70 15,8 18,0 20,7 25,3 28,6 35,3 40,9
Power consumption 1 [kW] 2,10 2,62 3,63 4,30 2,03 2,43 3,38 4,49 4,81 5,73 7,31 8,94 9,67 12,6
EER 1 3,69 3,65 3,20 3,51 3,82 3,73 3,46 3,52 3,74 3,61 3,46 3,20 3,65 3,24
Cooling capacity 2 [kW] 5,77 7,08 8,73 11,5 5,75 7,15 8,81 11,9 13,4 15,7 19,1 21,7 26,8 31,8
Power consumption 2 [kW] 2,05 2,54 3,44 4,09 2,01 2,39 3,16 4,23 4,69 5,27 6,63 8,07 8,87 11,8
EER 2 2,82 2,79 2,54 2,81 2,86 2,99 2,79 2,81 2,86 2,98 2,88 2,69 3,02 2,70
ESEER 1 3,43 3,46 3,16 3,31 3,56 3,73 3,37 3,40 3,29 3,51 3,36 3,17 3,53 3,20
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 4,35 4,92 6,07 7,03
Available pressure head 1 kPa 59 50 40 37 60 53 39 33 26 23 41 34 56 43
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 3,29 3,73 4,61 5,47
Available pressure head 2 kPa 72 66 59 51 72 66 59 50 49 47 71 66 87 79
Sound power [dBA] 66 66 66 69 66 66 66 69 69 69 74 74 76 76
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 1 1 1 1
No. of circuits 1 1 1 1 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 2 2 3 3
Air flow-rate [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350 6800 6800 10200 10200
No. of system heat exchangers 1 1 1 1 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 3 3 4 4

15
BRAT2 - BRAN2 EN
U
GENERAL TECHNICAL DATA I A
(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
BRAN2 without hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061 0071 0091 0101 0121
Heating capacity 1 [kW] 6,76 8,37 10,5 12,9 6,73 8,3 10,00 13,4 14,8 17,3 21,5 24,7 29,7 35,9
Power consumption 1 [kW] 2,31 2,93 3,57 4,50 2,30 2,78 3,31 4,63 4,79 5,73 6,81 7,84 9,49 11,3
COP 1 2,93 2,86 2,93 2,87 2,93 2,98 3,02 2,89 3,09 3,02 3,16 3,15 3,13 3,17
Cooling capacity 2 [kW] 4,81 5,89 7,29 9,6 4,80 5,99 7,35 10,0 11,1 13,0 15,9 18,4 22,3 27,1
Power consumption 2 [kW] 2,02 2,49 3,36 3,95 1,98 2,36 3,06 4,09 4,53 5,09 6,40 7,80 8,51 11,3
EER 2 2,38 2,37 2,17 2,42 2,43 2,54 2,40 2,43 2,45 2,56 2,49 2,36 2,62 2,39
ESEER 1 2,89 2,92 2,70 2,86 3,00 3,14 2,88 2,94 2,78 3,00 2,89 2,77 3,05 2,83
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 3,70 4,25 5,11 6,17
Pressure drop 1 kPa 10 12 13 23 10 12 12 25 25 24 28 29 29 33
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 2,74 3,16 3,84 4,66
Pressure drop 2 kPa 5 6 6 13 5 6 6 14 14 14 16 16 17 19
Sound power 4 [dBA] 66 66 66 69 66 66 66 69 69 69 74 74 76 76
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 1 1 1 1
No. of circuits 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Type of compressor Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll
No. of fans 1 1 1 2 1 1 1 2 2 2 2 2 3 3
Air flow-rate 1 [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350 6800 6800 10200 10200
No. of system heat exchangers 1 1 1 1 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 3 3 4 4
BRAN2 with hydronic kit 0021 0025 0031 0041 0021 0025 0031 0041 0051 0061 0071 0091 0101 0121
Heating capacity 1 [kW] 6,72 8,32 10,4 12,8 6,68 8,2 9,99 13,3 14,8 17,2 21,4 24,5 29,4 35,7
Power consumption 1 [kW] 2,24 2,85 3,47 4,38 2,23 2,70 3,23 4,54 4,68 5,60 6,65 7,61 9,27 11,1
COP 1 3,00 2,92 3,00 2,92 3,00 3,05 3,09 2,93 3,16 3,07 3,22 3,22 3,17 3,22
Cooling capacity 2 [kW] 4,83 5,93 7,33 9,6 4,82 6,03 7,39 10,0 11,2 13,1 16,0 18,5 22,5 27,3
Power consumption 2 [kW] 1,98 2,44 3,29 3,91 1,94 2,31 2,99 4,03 4,46 5,00 6,27 7,64 8,43 11,1
EER 2 2,44 2,43 2,23 2,46 2,49 2,61 2,47 2,48 2,51 2,62 2,55 2,42 2,67 2,45
ESEER 1 2,97 3,02 2,77 2,91 3,07 3,26 2,97 2,99 2,85 3,09 2,97 2,84 3,12 2,89
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 3,68 4,21 5,06 6,14
Available pressure head 1 kPa 66 58 48 46 66 58 51 44 44 40 60 52 80 62
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 2,75 3,18 3,87 4,70
Available pressure head 2 kPa 74 73 67 56 74 73 67 55 55 55 81 79 94 91
Sound power [dBA] 66 66 66 69 66 66 66 69 69 69 74 74 76 76
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 1 1 1 1
No. of circuits 1 1 1 1 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 2 2 3 3
Air flow-rate [m3/h] 3000 3400 3400 6450 3000 3400 3400 6450 6000 6350 6800 6800 10200 10200
No. of system heat exchangers 1 1 1 1 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 3 3 4 4

16 BRAT2 - BRAN2 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.
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%
OPERATION WITH
WATER-GLYCOL MIX

17
BRAT2 - BRAN2 EN
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
0
10
20
30
40
50
60
70
80
90
100
01234567 8910
Pressure drop [kPa]
Water flow-rate [m3/h]
System heat exchanger pressure drop
0071 0091 0101
0121
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

18 BRAT2 - BRAN2 EN
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
0
10
20
30
40
50
60
70
80
90
120
110
100
021 345678
Available pressure head [kPa]
Water flow-rate [m3/h]
Available pressure head
01010071
0121
0091
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

19
BRAT2 - BRAN2 EN
CHECKING AND STARTING UP THE UNIT A
PREPARING FOR FIRST START UP or restarting
after shutting down for long periods.
The unit must be started up for the first time by the Techni-
cal Service.
Before starting up the units, make sure that:
- All safety conditions have been respected;
- The unit is adequately fixed to the surface it rests on;
- Clearances have been respected
- Water connections have been carried out as indicated in
the instruction manual;
- The water circuit is filled and vented.
- The water valves are open;
- Electrical connections have been carried out correctly
- Voltage is within a tolerance of 10% of the rated voltage
for the unit;
- The unit is correctly earthed;
- All electrical connections are tight and all water connec-
tions have been carried out correctly.
The unit must be started up for the first time with standard
settings. Set Point values may be modified only after testing
has been completed.
Before starting up, power up the unit for at least two hours
by switching QF1 and QS1 ON (see "wiring diagram" and
the control panel in standby) so as to allow the oil in the
compressor sump to heat up.
STARTING UP FOR THE FIRST TIME (after two hours)
Before starting the chiller:
-
Make sure the switch QF1 is in the OFF
position.
- Make sure the contact of the on/off device
SA1 (see the wiring diagram) is open (if fea-
tured).
- Close the door of the electrical panel.
- Move the main unit switch QS1 to the ON
position.
- Move the switch QF1 (outside the unit) to
“ON”.
-
The icon with the off symbol ( ) lights up on the control
panel, indicating power is connected.
For the position of internal components, see the dia-
grams.
ON
OFF
ON
OFF
ACTIVATING AND DEACTIVATING THE UNIT
- Move the contact on the on/off device SA1
(if featured) to ON.
During this phase, if the following indications appear on
the display, follow the instructions:
- ER20 check the water flow-rate and the connection of
the flow switch.
- ER01 (three-phase heat pumps only): check the power
supply connection and if necessary reverse two phas-
es.
At every change of season, make sure the operating
conditions fall within the limits specified.
Make sure the current input of the compressor is less
than the maximum shown in the table of technical speci-
fications.
Make sure the voltage is within the established limits and
that, for three phase units, the unbalance between the
phases is less than 2%.
Check that the cover is closed again following the setting
procedure.
To access the control panel, open the door:
- remove the screw 1;
- press the points 2 simultaneously and lift the door 3.
ON
OFF
set
esc
1
2
2
3
3

20 BRAT2 - BRAN2 EN
LEDS AND DISPLAY A
Alarm
Heating
Cooling
Standby
Defrost
1 STATUS AND OPERATING MODE LEDS
Compressor
Fans
System pump
Frost protection heater system heat exchanger
3 UTILITY LEDS
Clock
Degrees centigrade
Pressure (Bar)
Menu (ABC)
2 VALUE AND UNIT OF MEASURE LEDS
set
esc
1
3
2