CLIMAVENETA AWR MTD User manual

INSTALLATION - OPERATING - SERVICE MANUAL
Reverse-cycle air/water heat pumps with
domestic hot water production, axial-flow
fans and water pump assembly.
GB
AWR MTD
AWR MTD/B
0011÷0061

2AWR MTD - AWR MTD/B GB 01/2009
INDEX U I A
User
Installer
Assistance
Important
Prohibition
Danger voltage
Danger high temperatures
The manufacturer reserves the right to modify the data in this manual without warning.
Eurovent certification program.
The following symbols are used in this publication and inside the unit:
General warnings 3
Waiver of liability 3
Fundamental safety rules 3
Receiving and handling the product 4
Description of standard unit 5
Dimensioned drawings 6
Installation 6
Water connections 7
Water circuit data 9
Operating diagrams 12
Electrical connections 14
Mains power supply connections 15
Installer connections 17
Operating characteristics 25
General technical data 31
Checking and starting up the unit 33
HSW11 functions 34
LEDs and display 35
Displaying alarms 47
Shutting down for long periods 48
Routine maintenance 49
Special maintenance 49
Disposal 49
Troubleshooting 50
Useful information 51
U I A AI
AI
A
A
A
AI
A
A
A
A
AI
AIU
U
U
I A
I A
I
I
I
A
A
I
I A
I
I
A
A
I A
I A
I A
U
I
A

3GB 01/2009 AWR MTD - AWR MTD/B
INDEX U I A
GENERAL WARNINGS U I A
FUNDAMENTAL SAFETY RULES 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
without 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 con-
signed to the owner who should keep them carefully for
future consultation in the event of maintenance or service.
All repair or maintenance work must be carried out by
the Company’s Technical Service or qualified personnel
following the instructions in this manual.
The air-conditioner must under no circumstances be
modified or tampered with as this may create situations
of risk. Failure to observe this condition absolves the
manufacturer of all liability for resulting damage.
When operating equipment involving the use of electricity and water, a number of fundamental safety rules must be observed,
namely:
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
switch QF1 is in the OFF position (see the wiring dia-
gram).
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.
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.
Power supply: the cross section of the electrical cables
must be adequate for the power of the unit and the pow-
er supply voltage must correspond with the value indicat-
ed on the respective units. All units must be earthed in
conformity with legislation in force in the country con-
cerned.
Terminals 6, 7, 8 & 9 may be live 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
during the winter or the circuit is not emptied.
Handle the unit with the utmost care (see weight distrib-
ution table) to avoid damage..
WAIVER OF LIABILITY
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 in complete accor-
dance with the legislation in force in material in the country
concerned, and considering the operating conditions and
intended uses of the system, by qualified personnel.
U I A

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.
The units are supplied complete with:
- instruction manual;
- guarantee certificate;
- CE declaration;
- list of the main components and sub-assemblies fitted on
the product. These are contained in a plastic bag (A)
attached to the top of the chiller.
The unit must be handled by qualified and suitably equipped
personnel only using equipment appropriate for the weight
of the unit, in compliance with the safety standards in force
(and subsequent amendments.).
If a forklift truck is used, insert the forks under the base,
spacing the forks as wide apart as possible.
If a crane is used, pass the cables through the bottom of the
base, making sure they do not exert pressure on the unit.
Once the packaging has been removed, the appliance can
be lifted and moved by inserting two metal tubes (max.
diameter 22 mm) into the feet, and using suitable handling
equipment.
The instruction manual is an integral part of the unit
and should therefore be read and kept carefully..
The packaging should not be removed until the unit is
located in the installation site.
Do not dispose of packaging materials in the environ-
ment or leave them within reach of children as they may
represent a hazard.
The weight of the unit is biased towards the compres-
sor side (side of the packaging with the bar code, see
the figure).
During transport, the unit should be kept in a vertical
position.
The unit must be stored sheltered from direct sunlight,
rain, wind or sand.
Avoid exposing the unit to direct sunlight, as the pres-
sure inside the refrigerant circuit may reach dangerous
values and cause the activation of the safety valves,
where fitted.
Check the instructions on the packaging for stacking
units.
The packaging must be removed by the operator using
suitable protective equipment (gloves, glasses, etc.).
Take special care not to damage the unit.
Observe the local standards in force as regards disposal
of the packaging, using specialist collection or recycling
centres.
RECEIVING AND HANDLING THE PRODUCT I A
4AWR MTD - AWR MTD/B GB 01/2009
Hole Ø22
A
H
P
L
Bar code
(compressor side)
Dimensions AWR 0011 0025 0031 0041 0051 0061
Dimension L mm 970 970 970 970 970 970
Dimension P mm 475 525 525 525 525 525
Dimension H mm 1150 1450 1450 1450 1600 1600
Gross weight kg 135 160 165 175 185 190

5GB 01/2009 AWR MTD - AWR MTD/B
DESCRIPTION OF STANDARD UNIT I A
These air cooled reverse-cycle chillers with axial-flow fans
operate with R410A refrigerant fluid and are suitable for out-
door installation.
The units are CE marked, as established by the EU directives,
including the latest amendments, and the corresponding
approximated national legislation.
They are factory tested and on site installation is limited to
water and electrical connections.
VERSIONS AVAILABLE
AWR MTD
Reverse-cycle air/water heat pump with domestic hot water production. Built-in water pump assem-
bly complete with electric heaters.
AWR MTD/B
Reverse-cycle air/water heat pump with domestic hot water production. Built-in water pump assem-
bly without electric heaters.
The "/S" at the end indicates that a peak limiter is fitted for single-phase models.
11
10
15
13
4
20
14
6
8
5
12
3
19
18
17
16
21
9
1
2
7
1 Electrical panel
2 HSW11 controller
3 System plate heat exchanger
4 Low pressure switch
5 High pressure switch
6 Liquid sight glass (0041 - 0061)
7 Scroll compressor
8 Filter
9 Thermostatic valve
10 Axial-flow fan
11 Airside finned heat exchanger
12 Pump
13 Liquid recipient
14 Expansion vessel
15 Reversing valve
16 Auxiliary electric heaters (MTD version only)
17 Safety valve
18 Air vent valve
19 Pressure gauge
20 Base electric heater
21 Pressure transducer

U I A
6AWR MTD - AWR MTD/B GB 01/2009
DIMENSIONAL DRAWINGS I
600
W1 W2
W4 W3
900
D
B
C
=E
A
=
400
Dimensions 0011 0025 0031 0041 0051 0061
A mm 900 900 900 900 900 900
B mm 940 1240 1240 1240 1400 1400
C mm 370 420 420 420 420 420
D mm 320 370 370 370 370 370
E mm 580 580 580 580 580 580
Weight distribution AWR 0011 0025 0031 0041 0051 0061
W1 lato rear dx kg 47 62 64 65 68 71
W2 lato rear sx kg 23 18 20 22 24 24
W3 front sx kg 13 18 18 21 22 22
W4 front dx kg 42 52 53 57 61 63
tot kg 125 150 155 165 175 180
1 - Water connections IN 0011÷0025 Ø1” - 0031÷0061 Ø1”1/4
1 - Water connections OUT 0011 Ø3/4” - 0025÷0061 Ø1”1/4
INSTALLATION I
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.
- Follow the instructions shown in the chapter on DIMEN-
SIONAL DRAWINGS to allow room for maintenance oper-
ations. If installing multiple units the clearances must be
doubled.
POSITIONING
Before handling the unit, check the capacity of the lift equip-
ment used, respecting the instructions on the packaging.
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 positioning
of the lifting slings and safety pins in the special holes in the
base of the unit.
To avoid the slings damaging the unit, place protection
between the slings and the unit.
The unit should be installed on special vibration dampers.
See the chapter on DIMENSIONAL DRAWINGS for the sup-
port positions identified by W1, W2 etc. and the correspond-
ing weights for the correct sizing of the vibration dampers.
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 adequately
using tie rods if necessary.
In heating mode the unit produces a significant quantity of
condensate, which must be suitably drained.
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; in these case fit a frost protection heater
on the drain line.
For correct operation of the unit, avoid the following: obsta-
cles to air flow, leaves that may block the heat exchange
coil, strong winds that stop or reinforce air flow, sources of
heat too close to the unit, recirculation or stratification of air.

7GB 01/2009 AWR MTD - AWR MTD/B
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. 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. The following com-
ponents should be installed in 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
outlet);
4. A flow switch (inlet). The flow switch must be calibrat-
ed 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.
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.
10. The unit is fitted as standard with an expansion vessel;
make sure this is correctly sized for the water content of
the system and the expected operating temperature, oth-
erwise install an additional expansion vessel.
Failure to install the flow switches will mean the heat
exchangers are not protected in the event of no flow of liq-
uid.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.
Make sure that the frost protection heaters on the heat
exchanger are powered when the unit is off (unit in standby
“StbY”)
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.
The unit must be prevented from freezing at outside air tem-
peratures around 0°C.
It is recommended to use suitable percentages of antifreeze
(see “Water circuit data”), protect the piping with heating
sheaths, and empty the system, making sure there no water
remains at the lowest points in the circuit.
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.
Factory connections Installer connections
1
2
12
12
13
14
14 UTILITY
RETURN
UTILITY
OUTLET
98716
3
11
T
6
16
16
T
6
F
5
4
2
10
1
1
15
9
Utility water circuit connection diagram
1 Pressure gauge
2 Vibration damper joint
3 Shut off valve
4 Calibrating valve
5 Flow switch
6 Thermometer
7 Pump
8 Safety valve
9 Expansion vessel
10 Wire mesh filter
11 Unit fill/drain valve
12 Temperature sensor
13 Differential pressure switch
14 Drain / chemical washing valve
15 Auxiliary heaters
16 System vent

8AWR MTD - AWR MTD/B GB 01/2009
0025-0061
100
85
D
B
SYSTEM FILL G1/2
WATER OUTLET
A=C
524
559
UNIT VENT
SAFETY VALVE DISCHARGE
WATER INLET
0011
D
A100
328
B
WATER INLET
WATER OUTLET
OPENING FOR CONDENSATE DRAIN CONNECTION
SYSTEM FILL G1/2
CONDENSATE DRAIN POSITION 0011-0061
C
524
559
SAFETY VALVE DISCHARGE
UNIT VENT
Dimensions 0011 0025 0031 0041 0051 0061
A mm 61,5 61,5 61,5 61,5 61,5 61,5
B mm 321,5 621,5 621,5 621,5 721,5 721,5
C mm 91,5 61,5 61,5 61,5 61,5 61,5
D mm 72,5 454,5 454,5 454,5 549,5 549,5
Water in/out fittings Ø 1"-3/4" 1"-1"1/4 1"1/4 1"1/4 1"1/4 1"1/4
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.
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.
CONDENSATE DRAIN
The unit is fitted with condensate pan; this must be connect-
ed to a drain system to take away the water that forms, see
the drawing.
If the outside air temperature is less than 0°C, the conden-
sate drained from the collection pan may freeze.
The unit must be supported on a suitable structure or brack-
ets to keep it off the ground, with a frost protection heater fit-
ted on the drain line.
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

9GB 01/2009 AWR MTD - AWR MTD/B
WATER CIRCUIT DATA I A
Water content in the system
Size 0011 0025 0031 0041 0031 0041 0051 0061
Minimum water content l 24 31,5 40 46 40 46 57 74
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
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.
0 -5 -10 -15 -20 -25
Freezing point (°C)
Percentage of ethylene glycol in weight
cPf: cooling capacity correction factor
cQ flow rate correction factor
cdp: pressure drop correction factor
f1: capacity correction factor
fk1: compressor power input correction factor
fx1: total power input correction factor
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.
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
FILLING THE SYSTEM
- Before starting to fill, place the unit mains
switch QF1 in the OFF position.
- 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 valve out-
side the unit.
- When water begins to leak out of the terminal air vent valves,
close them and continue filling until the pressure gauge indi-
cates 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 in 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 starting to empty, place switch QF1
in the “OFF” position
- Make sure the system fill/top-up water
valve is closed.
- Open the drain valve outside the unit and
all the installation 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°).
ON
OFF
ON
OFF

10 AWR MTD - AWR MTD/B GB 01/2009
PUMP CHARACTERISTICS
The curves shown above refer to the flow-rates and heads of the pumps only.
To calculate the useful values relating to the system or source, subtract the pressure drop of the heat exchangers, see the graph
"Heat exchanger pressure drop: system".
246810
10
20
30
40
50
60
70
80
90
100
110
120
130
140
Hp [kPa]
Q [m3/h]
B
AA
= AWR 0011 MTD
B = AWR 0025÷0061 MTD
HEAT EXCHANGER PRESSURE DROP: SYSTEM
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
0123456
Q [m3/h]
0011 0025 0031 0041 0051 0061
[KPa]

11GB 01/2009 AWR MTD - AWR MTD/B
DHW storage cylinder, 280 litres
5
9
11
10
6
7
8
1
A
D
C
B
1 Manual fill and drain valve
2 Adjustable thermostat
3 Probe socket
4 Thermometer
5 Thermostatic valve
6 Pump SXM 32-50
7 Plate heat exchanger WP 24*40
8 1”1/4 GAS attachment for optional electric
heater
9 Automatic vent valve 3/4” GAS
10 Expansion vessel, 18 litres
11 Flexible polyurethane insulation, 50 mm
thick, sky blue finish
A Primary outlet; heat pump return 1” GAS
B Domestic water inlet; mains 3/4” GAS
C Domestic hot water outlet 3/4” GAS
D Primary inlet; heat pump outlet 1” GAS

12 AWR MTD - AWR MTD/B GB 01/2009
OPERATING DIAGRAMS, AWR MTD I A
5
4
6
2
3
2
3
11
12
97
8
M
10
F
1
13 M
14
2
12
13 3
2
3
M
5
4
6
11
14
97
8
M
10
1
15 M
16
The heat pump is connected directly to the central heating circuit (the minimum water
content required must be ensured).
The heat pump can also produce domestic hot water by managing a special 3-way
valve, connected to a hot water storage cylinder
The heat pump heats the water in the heating system storage cylinder.
The underfloor system is managed by the central heating pump, installed externally
to the storage cylinder, and by the mixer valve (unit 12).
The heat pump can also produce domestic hot water by managing a special 3-way
valve, connected to a hot water storage cylinder.
1 Heat pump AWR MTD
2 Non-return valve
3 Control valve with dial
4 Shut off valve
5 Expansion vessel (if necessary)
6 Air separator
7 DHW storage
8 Storage temperature sensor BT4
9 Thermostatic valve
10 Flow switch
11 Safety valve
12 Outside air temperature sensor
13 3-way valve, domestic hot water production
14 Electric heater
Example water circuit diagram
1 Heat pump AWR MTD
2 Non-return valve
3 Control valve with dial
4 Shut off valve
Expansion vessel (if necessary)
6 Air separator
7 DHW storage
8 Storage temperature sensor BT4
9 Thermostatic valve
10 Flow switch
11 Safety valve
12 Underfloor system control not supplied by
Climaveneta.
13 System storage
14 Outside air temperature sensor
15 3-way valve, domestic hot water pro-
duction
16 Electric heater
Example water circuit diagram

13GB 01/2009 AWR MTD - AWR MTD/B
OPERATING DIAGRAMS, AWR MTD I A
3 3
5
4
6
11
12
97
8
M
10
F
1
13 M
14
12 3 3
13
5
4
6
11
15
14
97
8
M
10
F
1
16 M
17
The heat pump is connected directly to the central heating circuit (the mini-
mum water content required must be ensured).
The heat pump can also produce domestic hot water by managing a special
3-way valve, connected to a hot water storage cylinder.
The heat pump heats the water in the heating system storage cylinder.
The underfloor system is managed by the central heating pump, installed
externally to the storage cylinder, and by the mixer valve (unit 12).
The heat pump can also produce domestic hot water by managing a special
3-way valve, connected to a hot water storage cylinder.
1 Heat pump AWR MTD
2 Non-return valve
3 Control valve with dial
4 Shut off valve
5 Expansion vessel (if necessary)
6 Air separator
7 DHW storage
8 Storage temperature sensor BT4
9 Thermostatic valve
10 Flow switch
11 Safety valve
12 Outside air temperature sensor
13 3-way valve, domestic hot water production
14 Electric heater
Example water circuit diagram
1 Heat pump AWR MTD
2 Non-return valve
3 Control valve with dial
4 Shut off valve
5 Expansion vessel (if necessary)
6 Air separator
7 DHW 3storage
8 Storage temperature sensor BT4
9 Thermostatic valve
10 Flow switch
11 Safety valve
12 Underfloor system control not supplied by
Climaveneta.
13 System storage
14 Outside air temperature sensor
15 Bypass valve
16 3-way valve, domestic hot water production
17 Electric heater
Example water circuit diagram

14 AWR MTD - AWR MTD/B GB 01/2009
ELECTRICAL CONNECTIONS I A
The heat pumps must be installed downstream of a main
switch (QF1, see wiring diagram), as required by the stan-
dards in force in the country where the unit is installed. Con-
nection to the mains power supply and the connection of the
flow switch to the corresponding terminals must be per-
formed by authorised personnel in compliance with the stan-
dards 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 (plumbing 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 3%).
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 con-
cerned..
A thermal overload switch and a lockable mains dis-
connect switch, in compliance with the CEI-EN stan-
dards (contact opening of at least 3mm), with ade-
quate switching and residual current protection
capacity based on the electrical data table shown
below, must be installed as near as possible to the
appliance.
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.
Electrical data at maximum conditions allowed (full load)
Size Power Maximum values Max Max
Fuses (5x20T 250V)
supply Compressor Fan/fans Pump Total Aux. heaters (3) values (1) values (2)
F.L.I. N.L.A. L.R.A. F.L.I. F.L.A. F.L.I. F.L.A. F.L.I. F.L.A. F.L.I. F.L.A. F.L.A. F.L.A. FU1 FU2 FU3 FU4 FU5
(V-Ph-Hz) (kW) (A) (A) (kW) (A) (kW) (A) (kW) (A) (kW) (A) (A) (A)
AWR 0011 MTD 230~50 3,4 16,0 26 0,2 0,6 0,2 1,0 3,8 17,6 3,0 13,0 17,6 17,6 6.3A 8A 1A 1A 1A
AWR 0025 MTD 230~50 4,1 19,0 37 0,2 0,6 0,1 1,2 4,4 20,8 4,0 17,4 20,8 20,8 1.6A 8A 1A 1A 1A
AWR 0031 MTD 230~50 4,9 23,0 44 0,2 0,6 0,1 1,2 5,2 24,8 5,0 21,7 24,8 24,8 1.6A 8A 1A 1A 1A
AWR 0041 MTD 230~50 6,6 27,0 45 0,2 0,6 0,1 1,2 6,9 28,8 7,0 30,4 28,8 31,6 1.6A 8A 1A 1A 1A
AWR 0031 MTD 400-3N~50 4,5 8,0 48 0,2 0,6 0,1 1,2 4,8 9,8 9,0 13,0 9,8 14,2 1.6A 8A 1A 1A 1A
AWR 0041 MTD 400-3N~50 5,8 10,0 64 0,2 0,6 0,1 1,2 6,1 11,8 9,0 13,0 11,8 14,2 1.6A 8A 1A 1A 1A
AWR 0051 MTD 400-3N~50 6,9 11,8 64 0,2 0,6 0,1 1,2 7,2 13,6 9,0 13,0 13,6 14,2 1.6A 8A 1A 1A 1A
AWR 0061 MTD 400-3N~50 8,9 15,0 74 0,2 0,6 0,1 1,2 9,2 16,8 9,0 13,0 16,8 16,8 1.6A 8A 1A 1A 1A
F.L.I. Maximum power input
F.L.A. Maximum current input
L.R.A. Start-up current
(1) Maximum values for sizing the protection switches and power supply cables for AWR MTD/B and AWR MTD/S/B units
(2) Maximum values for sizing the protection switches and power supply cables for AWR MTD and AWR MTD/S units (with
electric heaters)
(3) Built-in heaters for versions AWR MTD and AWR MTD/S

15GB 01/2009 AWR MTD - AWR MTD/B
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 eight
screws (0011) - or ten screws (0025-0061)
- 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.
For the functional connection of the unit, bring the power
supply cable to the electrical panel inside the unit and con-
nect it to terminals U-N for units 0025-0041, to terminals
T1 and T3 on the disconnect switch for units 0011,
respecting the (U) phase, (N) neutral and (PE) earth in the
case of single phase units (230V~50Hz), or U-V-W phas-
es, N neutral and PE earth in three phase units (400V-3N~
50 Hz).
- Reposition the inspection panel.
- Check that all the covers removed to make the electrical
connections have been replaced before powering up the
unit.
- Place the main switch QF1 (outside the unit) in the “ON”
position.
- The “POWER” LED on the control panel comes on to sig-
nal that power is connected.
- The message ON is shown on the HSW11 control panel,
signalling that power is connected.
AB
A5
ELECTRICAL PANEL LAYOUT AWR 0011 MTD-MTD/B SINGLE-PHASE
A1 Radio interference suppresser
A2 Fan control module
A3 Electronic controller
A5 Peak limiter
C1 Compressor start capacitor
C2-3 Fan start capacitor
FU3 Auxiliary circuit protection fuse
FU4 Transformer protection fuse
FU5 Board power supply protection fuse
TCI Autotransformer
KA2 Auxiliary heating element relay
KA3 High pressure switch relay
KA4 Electric heater relay
KA5 Domestic hot water 3-way valve relay
KA6 Compressor control relay
KM2-3 Auxiliary heater contact (MTD version only)
QM1 Compressor thermal overload switch
QF1 Unit thermal overload switch
QF2-3 Auxiliary heating element thermal overload switch (MTD
version only)
QS1 Door lock disconnect switch

16 AWR MTD - AWR MTD/B GB 01/2009
KA2 KA5
KA3 KA4
ELECTRICAL PANEL LAYOUT AWR 0025-0041
MTD-MTD/B SINGLE-PHASE
ELECTRICAL PANEL LAYOUT AWR MTD-MTD/B
THREE PHASE
A1 Radio interference suppresser
A2 Fan control module
A3 Electronic controller
A5 Peak limiter
C1 Compressor start capacitor
C2-3 Fan start capacitor
FU1 System water pump protection fuse
FU3 Heater protection fuse
FU4 Transformer protection fuse
FU5 Auxiliary circuit protection fuse
TCI Autotransformer
KA2 Auxiliary heating element relay
KA3 High pressure switch relay
KA4 Electric heater relay
KA5 Domestic hot water 3-way valve relay
KA6 Compressor control relay
KA7 Alarm relay
KM2-3 Auxiliary heater contact (MTD version only)
QM1 Compressor thermal overload switch
QF1 Unit thermal overload switch
QF2-3 Auxiliary heating element thermal overload switch (MTD version
only)
QS1 Door lock disconnect switch
KA2
KA3 KA4
A1 Radio interference suppresser
A2 Fan control module
A3 Electronic controller
A5 Peak limiter
C2-3 Fan start capacitor
FU1 System water pump protection fuse
FU2 Fan protection fuse
FU3 Heater protection fuse
FU4 Transformer protection fuse
FU5 Auxiliary circuit protection fuse
TCI Autotransformer
KA1 Phase sequence control relay
KA2 Auxiliary heating element relay
KA3 High pressure switch relay
KA4 Electric heater relay
KA5 Domestic hot water 3-way valve relay
KA6 Compressor control relay
KA7 Alarm relay
KM2-3 Auxiliary heater contact (MTD version only)
QM1 Compressor thermal overload switch
QF1 Unit thermal overload switch
QF2-3 Auxiliary heating element thermal overload switch (MTD version
only)
QS1 Door lock disconnect switch

17GB 01/2009 AWR MTD - AWR MTD/B
All the terminals referred to in the following explanations are
to be found on the terminal board located inside the electri-
cal panel and called “installer terminals” (see wiring dia-
gram).
REMOTE ON/OFF (SA1)
To use a remote on/off device, connect the contact of the
device to terminals 14 and 15 on the installer terminal
board.
Set parameter CL42 = -1.
Remote off corresponds to standby status, with the com-
pressor and pump off, yet all the safety features are active.
REMOTE SUMMER-WINTER SWITCHING (SA2)
To use a remote summer/winter changeover device, connect
the contact of the device to terminals 16 and 17 on the
installer terminal board.
To activate the device, proceed as follows:
- From the HSW11 control panel select parameter CL43
and set it to the value +3 (contact closed = summer, con-
tact open = winter) or -3 (contact closed = winter, contact
open = summer).
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 12 and the neutral.
REMOTE KEYPAD KIT (A4)
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:
- disconnect the power supply and then access the inside of
the electrical panel;
- connect the remote control module with 3 wires to termi-
nals 22, 23 and 24 on the installer terminal board:
terminal 22 connected to the GND/black terminal on the
keypad;
terminal 23 connected to the signal/blue terminal on the
keypad;
terminal 24 connected to the +12VDC/red terminal on the
keypad;
To avoid interference due to magnetic fields, the use of
shielded cable is recommended. The cable should not
be more than 100 m long.
CONNECTING A FLOW SWITCH (F3)
If a flow switch is used, connect it to terminals 18 and 19 on
the installer terminal board, after having removed the
jumper.
COMPRESSOR ON SIGNAL (GN1)
For remote display of the compressor operating status, an
audible 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 neutral.
DOMESTIC HOT WATER 3-WAY VALVE (YV2)
To configure a 3-way for the production of domestic hot
water (supplied by Climaveneta), make the following con-
nections:
- terminal 7 on the heat pump connected to the phase L
- terminal 6 on the heat pump connected to the balck wire
on the 3-way valve
- brown wire on the 3-way valve connected to Phase L
- blue wire on the 3-way valve connected to Neutral N
- yellow/green wire connected to earth
The valve is also fitted with a limit switch contact. The con-
tact is either closed or open, depending on the position of
the valve.
Limit switch contact (red and green wire):
Closed = Valve open
Open = Valve closed
The 3-way valve for the production of domestic hot water, if
not supplied by Climaveneta, should have the following
characteristics:
- Voltage 230V AC, 50/60 Hz
- Opening and closing time 10s.
- P delta 500 kPa
- Fluid temperature 0°C to 90°C
Use three-way valves with a pressure drop below 20 kPa.
DOMESTIC HOT WATER STORAGE TEMPERA-
TURE SENSOR (BT4)
The domestic hot water temperature inside the storage
cylinder is measured using sensor BT4, connected to termi-
nals 20 and 21.
AUXILIARY HEATING ELEMENT (KM4)
If an auxiliary heating element is used, heater or boiler, con-
nect the control device or contactor, as shown in the wiring
diagram.
For further details, see the chapter on “Operating character-
istics”.
INSTALLER CONNECTIONS I A

18 AWR MTD - AWR MTD/B GB 01/2009
SA1
RD1
UPE N
41 2 3 5678 9 101112131415161718192021222324
SA2 F3
GN1KM4
BT4 A4
YV2
N
L
Blue Black Brown Y/G
230 VAC 1A max
+to
Gnd Signal+12Vdc
PE
TERMINAL BLOCK AWR 0011 MTD-MTD/B SINGLE-PHASE
UPE N
123UN 456789
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
SA1 SA2 F3 BT4 A4
+to
Gnd Signal+12Vdc
RD1GN1KM4YV2
N
L
230 VAC 1A max
Blue
Black
Brown Y/G
PE
TERMINAL BLOCK AWR 0025-0041 MTD-MTD/B SINGLE-PHASE
UPE V W N
456789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
SA1 SA2 F3 BT4 A4
+to
Gnd Signal+12Vdc
400V - 3N ~ 50Hz
RD1GN1KM4YV2
N
L
230 VAC 1A max
Blue Black Brown Y/G
PE
TERMINAL BLOCK AWR 0031-0061 MTD-MTD/B THREE-PHASE

19GB 01/2009 AWR MTD - AWR MTD/B
SINGLE-PHASE WIRING DIAGRAM AWR 0011 MTD
A1 Radio interference suppresser A2 Fan control module A3 Electronic controller A4 Remote unit control display keypad A5 Compressor start A6 Pump control module BP3 Condenser/evaporator control pressure transducer BT1 Water heat exchanger inlet temperature sensor BT2 Water heat exchanger outlet temperature sensor BT3 Outside air temperature sensor BT4 Hot water storage temperature sensor C1 Compressor start capacitor C2 Fan start capacitor E1 Water pump EV1 Fan F1 High pressure switch
F2 Low pressure switch F3 Flow switch F4 Water differential pressure switch FU1 System water pump protection fuse FU2 Fan protection fuse FU3 Auxiliary circuit protection fuse FU4 230/24/12 VAC transformer protection fuse FU5 Board power supply protection fuse GN1 Green compressor ON light KA2 Hot water storage heater relay KA3 High pressure switch relay KA5 3-way valve relay KA6 Compressor control relay KA7 Alarm relay KM2-3 Auxiliary heating element control contactor KM4 Hot water storage heater control contactor
QF1 Chiller assembly thermal overload switch QF2-3 Auxiliary heating element thermal overload switch QM1 Compressor thermal overload switch QS1 Door lock disconnect switch R1 Compressor oil sump heater R2 Heat exchanger frost heater R3-4 Auxiliary heating element R5 Drain pan frost heater RD1 Red unit shutdown warning light SA1 On-off switch and/or timer input SA2 Summer-winter switch input TC1 230/24/12 VAC transformer YV1 Reversing valve YV2 3-way valve (heating/DHW) Z1 Compressor
1 Not supplied 2 Optional

20 AWR MTD - AWR MTD/B GB 01/2009
SINGLE-PHASE WIRING DIAGRAM AWR 0011 MTD/B (without built-in electric heaters)
A1 Radio interference suppresser A2 Fan control module A3 Electronic controller A4 Remote unit control display keypad A5 Compressor start A6 Pump control module BP3 Condenser/evaporator control pressure transducer BT1 Water heat exchanger inlet temperature sensor BT2 Water heat exchanger outlet temperature sensor BT3 Outside air temperature sensor BT4 Hot water storage temperature sensor C1 Compressor start capacitor C2 Fan start capacitor E1 Water pump EV1 Fan F1 High pressure switch
F2 Low pressure switch F3 Flow switch F4 Water differential pressure switch FU1 System water pump protection fuse FU2 Fan protection fuse FU3 Heater protection fuse FU4 230/24/12 VAC transformer protection fuse FU5 Board power supply protection fuse GN1 Green compressor ON light KA2 Hot water storage heater relay KA3 High pressure switch relay KA4 R3 enabling relay KA5 3-way valve relay KA6 Compressor control relay KA7 Alarm relay KM4 Hot water storage heater control contactor
QM1 Compressor thermal overload switch QS1 Door lock disconnect switch R1 Compressor oil sump heater R2 Heat exchanger frost heater R5 Drain pan frost heater RD1 Red unit shutdown warning light SA1 On-off switch and/or timer input SA2 Summer-winter switch input TC1 230/24/12 VAC transformer YV1 Reversing valve YV2 3-way valve (system/DHW) Z1 Compressor
1 Not supplied 2 Optional