DeLonghi AWR-MTD2-XEH, AWR-MTD2-XE-0031, AWR-MTD2-XE-0041, AWR-MTD2-XE-0051, AWR-MTD2-XE-0061 Installation, Operation And Service Manual

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INSTALLATION - OPERATING - SERVICE MANUAL

Reverse-cycle air/water heat pumps with domestic hot water production, axial-flow fans and water pump assembly.

AWR-MTD2-XE 0011÷0091

2 AWR-MTD2-XE EN 11/2010

U I A

User

Installer

Assistance

Important

Prohibition

Danger voltage

Danger high temperatures

INDEX

U I A

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

Unit identification 5

Description of standard unit 6

Dimensioned drawings 7

Installation 7

Water connections 8

Electrical connections 11

Installer connections 12

Mains power supply connections 15

Installer connections 14

General technical data 32

Operating limits 33

Pump curve 34

Checking and starting up the unit 36

Description of room controller buttons and 38 display

Operation and functions of the room controller 39

Control and operating characteristics 48

System configuration 53

Maintenance and service 59

Peak limiter alarm signals 61

Shutting down for long periods 62

Scheduled maintenance 62

Unscheduled maintenance 63

Disposal 63

List of parameters 64

Installer operations CHECKLIST 66

U I A A

UUI A

I A

IIA

I A

AIU

3EN 11/2010 AWR-MTD2-XE

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 consigned 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 persons 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 authorisation 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 diagram). 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 operations. Power supply: the cross section 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.

Terminals 6, 7, 9, 10, 11, 12, 13, 21, 22, 23, 24, 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 distribution table) to avoid damage.

WAIVER OF LIABILITY

This publication is the sole property of Manufacturer. Any reproduction or disclosure of such is strictly prohibited without the written authorisation of Manufacturer. This document has been prepared with maximum care and attention paid to the content shown. Nonetheless, Manufac- turer 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 accordance 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

AWR-MTD2-XE EN 11/2010

Dimensions 0011 0025 0031 0041 0051 0061 0091

Dimension L mm 970 970 970 970 970 1600 1600 Dimension P mm 525 525 525 525 525 610 610 Dimension H mm 1450 1450 1450 1600 1600 1360 1850 Gross weight Kg 165 170 175 190 200 275 360

VISUAL INSPECTION

When the items are consigned by the carrier:

- make sure that the goods delivered correspond to the description on the delivery note, comparing this against the data on the packaging label.

- make sure the packaging and the unit are intact.

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.

HANDLING PACKAGED UNITS

The unit should always be handled by qualified personnel using equipment adequate for the weight of the unit, in compliance with the safety standards in force (and subsequent amendments).

• Lifting by forklift (1) Insert the forks under the long side of base, opening the forks as fare as possible.

• Lifting by crane (2) Use slings with hooks suitable for the weight being lifted. Secure the hook to the lifting bracket fixed to the unit, use always four equal length slings, as shown in the figure, to ensure the weight is balanced.

REMOVING THE PACKAGING

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.

Do not dispose of packaging materials in the environment or leave them within reach of children as they may represent a hazard.

Envelope A, located in the compressor compartment, contains:

• instruction manual;

• warranty certificate;

• CE declaration;

• list of the main components and sub-assemblies fitted on the product

• remote room control unit A5 (must be installed)

• DHW storage water temperature probe BT8

• outside air temperature probe BT11 (must be installed)

• probe BT9 only to be installed when supplementary source is available

Make sure the components listed above are not lost or misplaced.

The instruction manual is an integral part of the unit and should therefore be read and kept carefully.

STORING THE UNITS

The units must be stored sheltered from direct sunlight, rain, wind or sand. Avoid exposing the units to direct sunlight, as the pressure inside the refrigerant circuit may reach dangerous values and cause the activation of the safety valves, where fitted. The units cannot be stacked.

RECEIVING AND HANDLING THE PRODUCT

I A

Bar code

(compressor side)

5EN 11/2010 AWR-MTD2-XE

RECEIVING AND HANDLING THE PRODUCT

I A

HANDLING UNPACKAGED UNITS

When the packaging has been removed:

• Remove the wooden base.

• Fit the vibration damping feet (accessories).

• Handle the unit using equipment that is suitable for its weight (forklift or crane), in compliance with the safety standards in force (and subsequent amendments).

• Do not drag the unit as the feet may be damaged or break.

Hole Ø22

UNIT IDENTIFICATION

U I A

The heat pump can be identified from:

PACKAGING LABEL

Describes the product identification data

RATING PLATE

Describes the unit technical and performance specifications. Shows the serial number used to uniquely identify the unit. The serial number is also used to identify the unit’s spare parts.

If service is required, the following information must be provided to the service centre: Model, serial number, year of production.

Installation and maintenance operations are much more difficult if the identification plates or anything else needed to clearly identify the product are tampered with, removed or missing.

NOMENCLATURE

Packaging label

Rating plate with serial number

AWR MTD2 XE 0011 m s

Power supply voltage: m = 230V/50Hz/1ph t = 400V/3N/50Hz

size

s = peak limiter

Model

6 AWR-MTD2-XE EN 11/2010

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 outdoor 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-MTD2-XE

Reverse-cycle air/water heat pump with domestic hot water production. Built-in water pump assembly without electric heaters.

8 5

1 Electrical panel 2 NadiSystem 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 17 Safety valve 18 Air vent valve 19 Pressure gauge 20 Base electric heater 21 Pressure transducer

7EN 11/2010 AWR-MTD2-XE

U I A

DIMENSIONED DRAWINGS

600

900

400

Dimensions 0011 0025 0031 0041 0051 0061 0091

A mm 900 900 900 900 900 1550 1550 B mm 1240 1240 1240 1390 1390 1200 1700 C mm 420 420 420 420 420 450 450 D mm 370 370 370 370 370 497 497 E mm 580 580 580 580 580 1477 1477

Weight distribution 0011 0025 0031 0041 0051 0061 0091

W1 lato rear dx kg 60 62 64 67 71 88 117 W2 lato rear sx kg 17 18 20 23 24 39 54 W3 front sx kg 17 18 18 22 22 36 51 W4 front dx kg 51 52 53 58 63 87 113 tot kg 145 150 155 170 180 250 335

INSTALLATION

CHOICE OF INSTALLATION SITE

Before installing the unit, agree with the customer the site where it will be installed, taking the following points into consideration:

• check that the support surface is adequate to support the weight of the unit;

• respect safety distances between the unit and other equipment or structures so that the fan air intake and outlet are not blocked in any way.

• Follow the instructions shown in the chapter on DIMENSIONED DRAWINGS to allow room for maintenance operations.

If installing multiple units the clearances must be doubled.

POSITIONING

• Install the vibration damping feet (accessories).

• Check the unit supports and weights before positioning

• Make sure that the unit is level, adjust the height of the support feet if necessary

• Use the flexible joints supplied for the water connections

• Make sure there is easy access to the water circuit and electrical parts

• For installation, 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 condensate may freeze; in these case fit a frost protection heater on the drain line.

• Consider the maximum height that may be reached by snow to avoid blocking the air intake or outlet (outdoor installation)

• Unit for outdoor installation

For correct operation of the unit, avoid the following:

• obstacles to air flow, such as leaves that may block the heat exchange coil

• strong winds that stop or reinforce air flow

• sources of heat too close to the unit

• air recirculation between intake and outlet

• poor air change

• stratification of air

8 AWR-MTD2-XE EN 11/2010

WATER CONNECTIONS

I A

Warnings

- The choice and installation of components is the responsibility of the installer who should follow good working practice and current legislation.

Before connecting the pipes make sure that these:

- do not contain stones, sand, rust, scale or any foreign objects that may damage the system.

- wash the system with clean water

Water connection dimensions

Components

The following components should be installed for correct installation of the unit:

1. Two pressure gauges with a suitable scale (inlet and outlet);

2. Two vibration damper joints (inlet and outlet).

3. Shut-off valves at the inlet and outlet.

4. A flow switch at the unit outlet on 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 (inlet and outlet);

6. An inlet filter (compulsory) as close as possible to the unit and positioned to allow easy access for scheduled maintenance (both on the system circuit and domestic hot water circuit).

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, otherwise install an additional expansion vessel.

100

528.5

563.5

A = C

328

0011-0051

SAFETY VALVE DISCHARGE

UNIT VENT

WATER INLET

WATER OUTLET

SYSTEM FILL G1/2

0061-0091

SYSTEM FILL G1/2

WATER OUTLET

WATER INLET

UNIT VENT

SAFETY VALVE DISCHARGE

OPENING FOR CONDENSATE DRAIN CONNECTION

Dimensions 0011 0025 0031 0041 0051 0061 0091

A mm 61,5 61,5 61,5 61,5 61,5 90,5 90,5 B mm 617 617 617 717,5 717,5 575 770 C mm 57 57 57 57 57 90,5 90,5 D mm 454,5 454,5 454,5 549,5 549,5 120 120 E mm - - - - - 560 551 Water in fittings Ø 1" 1" 1" 1" 1/4 1" 1/4 1" 1/4 1" 1/4 Water out fittings Ø 1" 1" 1" 1" 1/4 1" 1/4 1" 1/4 1" 1/4

9EN 11/2010 AWR-MTD2-XE

11. The connection piping should be supported in such a way as to avoid it weighing on the unit.

Failure to install the flow switches will mean the heat exchangers are not protected in the event of no flow of liquid. The Manufacturer 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:

• make sure the filters are clean

• check operation of the flow switches installed.

• Make sure that the frost protection heaters on the heat exchanger are powered when the unit is OFF

Water flow to the heat pump must conform to the values shown in the section on “General Technical Data”. The flow of water must be maintained constant during operation. The water content of the unit must be such as to avoid disturbing operation of the refrigerant circuits.

Risk of freezing

The unit must be prevented from freezing at outside air temperatures around 0°C. The following are recommended:

• use suitable percentages of antifreeze (see “Ethylene glycol 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 featured. The antifreeze used must be corrosion inhibited and compatible 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 system 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

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

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 performance 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

Fouling factors

(m2°C/W) f1

Evaporator

fk1 fx1

Water quality

The water used in the system and domestic hot water circuits 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

WATER CONNECTIONS

I A

10 AWR-MTD2-XE EN 11/2010

WATER CONNECTIONS

I A

Water content in the system

Size 0011 0025 0031 0041 0051 0061 0091

Minimum water content l 24 31,5 40 46 65 74 110

Expansion vessel size

Size 0011 0025 0031 0041 0051 0061 0091

Expansion vessel l 2222244

Safety valve calibration

Size 0011 0025 0031 0041 0051 0061 0091

Safety valve bars 6666666

Factory connections Installer connections

UTILITY RETURN

UTILITY OUTLET

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 System vent

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 condensate 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 condensate may freeze.

The unit comes with frost protection for the condensate collection basin inside the unit. Use hot wires on the condensate drain hose downstream of the unit to protect against frost.

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 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 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.

OFF

11EN 11/2010 AWR-MTD2-XE

ELECTRICAL CONNECTIONS

I A

The heat pumps must be installed downstream of a main switch (QF1, see wiring diagram), as required by the standards in force in the country where the unit is installed. Connection to the mains power supply and the connection of the flow switch to the corresponding terminals must be performed by authorised personnel in compliance with the standards 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 adequate for the power ratings indicated in the electrical specifications 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 installation work (plumbing and electrical) has been completed. All electrical connections must be carried out by qualified 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 electricity supply company. For electrical connections, use double insulation cable in conformity with legislation in force in the country concerned..

A thermal overload switch 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.

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)

F.L.I. Maximum power input F.L.A. Maximum current input L.R.A. Start-up current

Maximum values for sizing the protection switches and power supply cables.

Size

Power

supply

Maximum values Fuses

(5x20T 250V)

Heater

Power consumption without heater

Total power consumption

L.R.A.

[A]

FU1 FU5 FU6

(V-Ph-Hz) P MAX [kW] I MAX [A] P MAX TOT [kW] I MAX TOT [A] F.L.I. [kW] F.L.A. [A] [A] [A] [A]

0011ms 230-1N-50 - - - - 2,82 13,5 27 1,6 4 1,25 0025ms 230-1N-50 - - - - 3,56 16,7 30 1,6 4 1,25 0031ms 230-1N-50 - - - - 5,11 23,6 45 1,6 4 1,25 0041ms 230-1N-50 - - - - 6,15 30,1 45 1,6 4 1,25

0031t 400-3N-50 - - - - 4,76 10,0 48 1,6 4 1,25 0041t 400-3N-50 - - - - 6,38 12,4 64 1,6 4 1,25 0051t 400-3N-50 - - - - 6,43 12,7 64 1,6 4 1,25 0061t 400-3N-50 - - - - 7,77 14,8 75 1,6 4 1,25 0091t 400-3N-50 - - - - 10,86 24,6 111 2 4 1,25

AWR-MTD2-XE EN 11/2010

INSTALLER CONNECTIONS

I A

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

C90051683E_00

FU3

QS1

QM1

KA1

KA6

KA7

KA15

FU1

FU5

FU6

TC1

INSTALLER TERMINAL BLOCK

Power supply

13EN 11/2010 AWR-MTD2-XE

MAINS POWER SUPPLY CONNECTIONS

I A

AWR MTD2 XE heat pump terminal block

Installer connections

UVWN

400V - 3N ~50Hz

U N

230V - 1Ph - 50Hz

QS1

• 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 A for the main electrical power cable and cable gland B for 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 in the wiring diagram provided in this manual.

• The figures show the power supply connection terminals for 230V and 400V.

• Replace the covers on the electrical panel and the closing panel.

• Make sure that all the covers removed to make the electrical connections have been replaced before powering up the unit.

• Position the main switch QF1 (outside the unit) in the “ON” position.

• Once the remote terminal has been switched on, “OFF” and “init” are displayed.

• The room unit is ready to use after a few seconds, when “init” is shown and the clock is displayed

* Compliant with standards in force in the place where the unit is installed

Power supply 230V 400V Number of power wires 2 + PE 4 + PE Power wire size* 6 mmq 6 mmq

14 AWR-MTD2-XE EN 11/2010

Outside air probe (BT11) connection

The outside air probe allows the system water temperature set point to be compensated during heating or cooling operation.

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.

N-W

m 5,2nim

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.

INSTALLER CONNECTIONS

I A

45 46

BT11

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

15EN 11/2010 AWR-MTD2-XE

A5 room controller connection

Installation instructions

The room controller must be installed in the best reference position for temperature control. Position the room controller as follows:

• around 1.5 metres from the floor, in a part of the room that allows the sensor to accurately measure the room temperature;

• away from cold air flows, sunlight or other sources of heat.

• leave enough space above the room controller to allow assembly and removal where necessary.

• If the room controller is removed from its base, it disconnects from the power supply and consequently is no longer operating.

min. 10 cm

Installation procedure

Assembly

• Separate the front from the rear of the terminal using a screwdriver r (1)

• Disconnect the 4-pin connector from the front part (2)

• Remove the cover A1, unscrewing the screw A2 (3).

• Fix the controller support to the wall using the holes A3 (4). Support hole size and spacing in figure (5).

• Make the electrical connections as shown in the figure (6), also see the wiring diagram.

131

83,5

52 53 54 55

TxRx -

TxRx +

GND

24 VAC

GND

A5 room controller terminal block Installer terminal block

Number of wires 5 shielded Power supply wire size 0.5 mm

Maximum distance 500 m

4 5

INSTALLER CONNECTIONS

I A

16 AWR-MTD2-XE EN 11/2010

INSTALLER CONNECTIONS

I A

YV5 3-way valve for domestic hot water production

The 3-way valve installed outside of the unit deviates the flow of hot water produced by the unit to the DHW storage tank. During domestic hot water production, the cooling/heating demand is not satisfied. Wire the three-way valve supplied as an accessory by Manufacturer following the instructions shown in the figure.

The valve is also fitted with a limit switch. The limit switch contact is either closed or open based on the position of the valve. Limit switch (red and green wires): Auxiliary contact closed = Valve open Auxiliary contact open = Valve closed

If not supplied by Manufacturer, the 3-way valve for domestic hot water production should have the following characteristics:

• Voltage 230V AC, 50/60 Hz

• Opening/closing time 10s.

• Delta P 500 kPa

• Fluid temperature 0°C to 90°C Use three-way valves with pressure drop below 20 kPa. For further details see the chapter “Operating characteristics”.

If three-way valves with a travel time greater than 10 seconds are used, modify the setting of parameter 0231

• Close the cover A1 and secure it with the screw A2

• Plug in the 4-pin connector, figure (7)

• Replace the terminal, starting with the lower tabs, applying a hinge movement. Make sure that the electrical wires are inside to ensure correct fastening (click on).

• Dimensions of A5 room controller figure (8).

8 28

143

Wall

9 12 13

YV5

Yellow/Green

Red

Blue Green

Black

Brown

Auxiliary contact

INSTALLER CONNECTIONS

I A

43 44

6 7

230V / 400V

BT9

Description

Three-way valve travel time for domestic hot water production

Mn02

Parameter

no.

0231

Default

Value to be set

Set the travel time

for valves not supplied by the heat pump manufacturer

UOM

sec.

Optional connection

KM2 System outlet electric heater

An electric heater installed at the outlet can be activated as a supplementary heater for the system.

Solution 1

System with heat pump and electric heater with storage tank. Position probe BT9 in the storage tank.

17EN 11/2010 AWR-MTD2-XE

INSTALLER CONNECTIONS

I A

B) SUPPLEMENTARY: the electric heater operates in sup-

plementary heating mode, together with the compressor, to satisfy the heating load.

Supplementary heating for low outside air temperature

The electric heater is enabled only when the outside temperature is less than the value of parameter 0304, figure 3. To enable supplementary heating for low outside air temperature set parameter 0303 = 1 and 010G = 0

Electric heater operation reflects the trend in water outlet temperature, as shown on the graph in figure 4.

Description

Activation electrical heater 0 = Electrical Heater not enabled 1 = Electrical Heater enabled Type of outlet electric heater operation 0 = Supplementary 1 = Replacement Enable boiler 0 = Boiler not enabled 1 = Boiler enabled Activation with low outside air temperature 0 = Function not enabled 1 = Function enabled Outside air temperature to enable electric heater Minimum outside air temperature for heat pump operation (make sure the value set is the same as shown in the table) Electric heater delay time (allows the heat pump to reach steady operation and thus avoid activating the heater when not needed) Integration time to activate outlet electric heaters

Mn01

Mn03

Mn06

Parameter

0300

010G

0301

0303

0304

0311

0616

0617

Value to be

set

Example

-5°C

-15

600

UOM

°C

min.

°C*sec

Outlet electric heater control

A) REPLACEMENT: The electric heater is enabled when

the outside temperature is less than the value of parameter 0304 and the compressor is off, figure 3. To enable heater activation in REPLACEMENT mode set parameter 0303 = 1 and 010G = 1.

Electric heater operation reflects the trend in water outlet temperature, as shown on the graph in figure 4.

If the heat pump shuts down due to an alarm, the electric heater is activated automatically regardless of the outside air temperature. In REPLACEMENT mode the electric heater activation delay time is ignored, and the device is activated immediately if necessary.

Outlet electric heater operating parameters in REPLACEMENT mode

Outlet electric heater operating parameters in SUPPLEMENTARY mode for OUTSIDE AIR TEMP.

Description

Activation electrical heater 0 = Electrical Heater not enabled

1 = Electrical Heater enabled Type of outlet electric heater operation 0 = Supplementary 1 = Replacement Enable boiler 0 = Boiler not enabled 1 = Boiler enabled Activation with low outside air temperature 0 = Function not enabled 1 = Function enabled Outside air temperature to enable electric heater Integration time to activate outlet electric heaters

Mn03

Mn01

Mn03

Mn06

Parameter

0300

010G

0301

0303

0304

0617

Value to be

set

Example

-5°C 600

UOM

°C

°C*sec

43 446 7

230V / 400V

BT9

Solution 2

System with heat pump and outlet electric heater WITHOUT storage tank. Position probe BT9 on the system outlet pipe.

Set the parameters following the sequence described in the table

18 AWR-MTD2-XE EN 11/2010

INSTALLER CONNECTIONS

I A

Supplementary heating always enabled

Supplementary heating with the electric heater is enabled for all outside air temperatures. To enable heating at all times set parameter 0303 = 0 and 010G = 0

Electric heater operation reflects the trend in water outlet temperature, as shown on the graph in figure 4.

Once the heater is enabled, supplementary heating is activated when the integration time set for parameter 0617 is reached and the delay time 0616 has elapsed. The delay time is ignored when the unit is first started.

Example: Value 0617 = 600°C*sec Outlet temperature set point= 50°C Actual temperature = 40°C

(50 – 40) x 60 sec = 600°Csec. ----> Electric heater ON

Low values of 0617 mean frequent activation of the heater. Too high values of 0617 mean long delays in activating the heater

Description

Activation electrical heater 0 = Electrical Heater not enabled 1 = Electrical Heater enabled Type of outlet electric heater operation 0 = Supplementary 1 = Replacement Enable boiler 0 = Boiler not enabled 1 = Boiler enabled Activation with low outside air temperature 0 = Function not enabled 1 = Function enabled Minimum outside air temperature for heat pump operation (make sure the value set is the same as shown in the table) Electric heater delay time (allows the heat pump to reach steady operation and thus avoid activating the heater when not needed) Integration time to activate outlet electric heaters

Mn03

Mn01

Mn03

Mn06

Parameter

0300

010G

0301

0303

0311

0616

0617

Value to be

set

-15

600

UOM

°C

min.

°C*sec

3 4

Outlet electric heater operating parameters in SUPPLEMENTARY mode when always ENABLED

Outside air T

OFF

Enabled

Outlet heater

0304 Outside temperature to enable outlet heaters

3°C

OFF

Compressor

Heater

Electric heater activation delay time 0616

Integration time 0617

System water control set point

Actual water temperature

System HP control hysteresis

Set the parameters following the sequence described in the table

19EN 11/2010 AWR-MTD2-XE

INSTALLER CONNECTIONS

U I A

Boiler control

A) REPLACEMENT: the boiler is only enabled if the outside

air temperature is less than the value of parameter 0307 and the compressor is off, figure 3. To enable boiler activation in REPLACEMENT mode set parameter 0306=1 and 010H = 1

Boiler operation reflects the trend in water temperature, as shown on the graph in figure 4.

If the heat pump shuts down due to an alarm the boiler is activated automatically regardless of the outside air temperature. In REPLACEMENT mode the activation delay time is ignored, and the boiler is activated immediately if necessary.

Description

Mn03

Mn01

Mn03

Mn06

Parameter

no.

0300

0301

010H

0306

0307

0619

Value to be

set

Example

-5°C 600

UOM

°C

°C*sec

B) SUPPLEMENTARY: the boiler operates in supplementary heating mode, together with the compressor, to satisfy the heating load.

Supplementary heating for low outside air temperature The boiler is enabled only when the outside air temperature is less than the value of parameter 0307, figure 3. To enable the supplementary heating for outside air temperature set parameter 0306 = 1 and 010H = 0

Boiler operation reflects the trend in water temperature, as shown on the graph in figure 4.

Description

Enable electric heater 0 = Heater not enabled 1 = Heater enabled Activation Boiler 0 = Boiler not enabled 1 = Boiler enabled Type of boiler operation 0 = Supplementary 1 = Replacemen Activation with low outside air temperature 0 = Function not enabled 1 = Function enabled Outside air temperature to enable boiler Minimum outside air temperature for heat pump operation (make sure the value set is the same as shown in the table) Boiler activation delay time (allows the heat pump to reach steady operation and thus avoid activating the boiler when not needed) Integration time to activate boiler

Mn03

Mn01

Mn03

Mn06

Parameter

no.

0300

0301

010H

0306

0307

0311

0618

0619

Value to be

set

Example

-5°C

-15

600

UOM

°C

min.

°C*sec

Boiler operating parameters in REPLACEMENT mode

Boiler operating parameters in SUPPLEMENTARY mode for outside temperature

Boiler

43 44

BT9

Boiler

43 4467

Set the parameters following the sequence described in the table

KM2 Boiler

A boiler can be used as a supplementary or replacement heat source for the system.

Solution 1

System with heat pump and boiler with storage tank.

Solution 2

System with heat pump and boiler without storage tank.

20 AWR-MTD2-XE EN 11/2010

INSTALLER CONNECTIONS

U I A

Supplementary heating always enabled

Supplementary heating by boiler is enabled for all outside air temperatures. To enable heating at all times set parameter 0306 = 0 and 010H = 0

Boiler operation reflects the trend in water temperature, as shown on the graph in figure 4.

Description

Enable electric heater 0 = Heater not enabled 1 = Heater enabled Activation Boiler 0 = Boiler not enabled 1 = Boiler enabled Type of boiler operation 0 = Supplementary 1 = Replacement Activation with low outside air temperature 0 = Function not enabled 1 = Function enabled Outside air temperature to enable boiler Minimum outside air temperature for heat pump operation (make sure the value set is the same as shown in the table) Boiler activation delay time (allows the heat pump to reach steady operation and thus avoid activating the boiler when not needed) Integration time to activate boiler

Mn03

Mn01

Mn03

Mn06

Parameter

no.

0300

0301

010H

0306

0307

0311

0618

0619

Value to be

set

Example

-5°C

-15

600

UOM

°C

min.

°C*sec

3 4

Boiler operating parameters in SUPPLEMENTARY mode when always ENABLED

Once the boiler has been enabled, supplementary heating is activated when the integration time set for parameter 0619 is reached and the delay time 0618 has elapsed. The delay time is ignored when the unit is first started.

Example: Value 0619 = 600°C*sec Outlet temperature set point= 50°C Actual temperature = 40°C

(50 – 40) x 60 sec = 600°Csec. ----> Boiler ON

Low values of 0619 mean frequent activation of the boiler. Too high values of 0619 mean long delays in activating the boiler

Outside air T

OFF

Enabled

Boiler

0304 Outside temperature to enable boiler

3°C

OFF

Compressor

Boiler

Boiler activation delay time 0618

Integration time 0619

System outlet temperature set point

Actual water temperature

System HP control hysteresis

Set the parameters following the sequence described in the table

OFF

Heater

Compressor

0023

0209

21EN 11/2010 AWR-MTD2-XE

INSTALLER CONNECTIONS

U I A

Description

Domestic hot water heating 0 = heat pump only 1 = electric heater only 2 = heat pump + electric heater Legionella prevention function with: 0 = heat pump only 1 = electric heater only 2 = heat pump + electric heater Domestic hot water temperature set point for Legionella prevention Legionella prevention cycle day MONDAY (0=no; 1=yes) Legionella prevention cycle day TUESDAY (0=no; 1=yes) Legionella prevention cycle day WEDNESDAY (0=no; 1=yes) Legionella prevention cycle day THURSDAY (0=no; 1=yes) Legionella prevention cycle day FRIDAY (0=no; 1=yes) Legionella prevention cycle day SATURDAY (0=no; 1=yes) Legionella prevention cycle day SUNDAY (0=no; 1=yes) Legionella prevention cycle time

Enable Legionella prevention function 0 = Not enabled 1 = Enabled Maximum Legionella prevention function duration

Mn02

Parameter

no.

0202

0223

0211

0213

0214

0215

0216

0218

0219

0220

0221

0222

0225

Value to be

set

Example

65°C

Example 1

UOM

°C

min.

KM4 DHW storage electric heater

An electric heater can be managed for heating the DHW storage.

DHW storage electric heater control

The electric heater is activated to reach a temperature value that the heat pump on its own is not able to reach.

Example: Domestic hot water temperature produced with heat pump 0023 = 55°C Domestic hot water temperature produced with electric heater 0209 = 65°C. The electric heater works so as to increase the DHW storage temperature from 55°C to 65°C, figure 1

Legionella prevention function with electric heater

The Legionella prevention function ensures the elimination of the Legionella bacteria that reside in domestic water storage tanks. The temperature and duration of the Legionella prevention cycles are typically:

• 2 minutes > 70°C

• 4 minutes > 65°C

• 60 minutes > 60°C

To enable the Legionella prevention function, set 0222=1

Description

Electric heater operating mode 0 = Heat pump only 1 = Electric heater only 2 = Heat pump + Electric heater

Domestic hot water temperature set point with heat pump Domestic hot water temperature set point with heater

Mn02

Mn00

Mn02

Parameter

no.

0202

0023

0209

Value to be

set

Example

UOM

°C

Domestic hot water electric heater

10 11

22 AWR-MTD2-XE EN 11/2010

INSTALLER CONNECTIONS

U I A

21 22

230V 50Hz

1 Storage tank 2 System pump HL1

HL1 Configurable contact

This contact can be configured for the following functions:

• Alarm signal

• Secondary circuit pump

• Dehumidifier

Alarm signal

A visual or audible signal device can be activated if the unit shuts down due to a malfunction.

Configure the contact, selecting the desired function by setting parameter 015A:

Secondary circuit pump

If the system features a low-loss header, contact HL1 can be used to activate the circulating pump on the secondary circuit.

Configure the contact, selecting the desired function by setting parameter 015A:

Description

Enable the contact as: 0= Alarm signal 1= Dehumidifier 3= Secondary circuit pump

Mn01

Parameter

no.

015A

Value to be

set

UOM

Description

Enable the contact as: 0= Alarm signal 1= Dehumidifier 3= Secondary circuit pump

Mn01

Parameter

no.

015A

Value to be

set

UOM

Dehumidifier

A dehumidifier can be activated in radiant panel systems to reduce humidity in cooling mode. The contact closes and the dehumidifier is activated when the humidity measured by the probe on the A5 room controller exceeds the value set for parameter 0172. Configure the contact, selecting the desired function by setting parameter 015A:

Dehumidifier

21 22

Description

Enable the contact as: 0= Alarm signal 1= Dehumidifier 3= Secondary circuit pump

Mn01

Parameter

no.

015A

Value to be

set

UOM

230V 50Hz

21 22

23EN 11/2010 AWR-MTD2-XE

INSTALLER CONNECTIONS

U I A

HL2 Compressor ON signal

A remote visual signal device can be activated to indicate compressor operation.

230V 50Hz

23 24

SA1 Remote ON/OFF

The unit can be switched on/off from a remote control unit, for example a timer or room thermostat. The remote off function stops the compressor, fan and pumps, while frost protection remains active.

- The unit can be switched on/off from contact SA1 only when the unit has been switched on using the button on the A5 room controller

Contact closed = Heat pump ON Contact open = Heat pump OFF

25 26

SA1

SA2 Remote cooling/heating

Cooling/heating operating mode can be managed from a remote control unit. If remote cooling/heating changeover is enabled, the operating mode cannot be changed on the keypad.

Set the following parameters:

Contact closed = Cooling Contact open = Heating

27 28

SA2

Description

Enable remote contact 0= remote contact enabled 1= remote contact disabled (only from keypad)

Mn01

Parameter

no.

0100

Value to be

set

UOM

SA3 Remote system/domestic water priority

The priority of heat pump operation can be selected using a remote contact. Use a switch to select the following functions:

Contact closed = Domestic hot water only Contact open = Domestic hot water + System

Set the following parameters:

Description

Enable remote contact 0= remote contact enabled 1= remote contact disabled (selection from keypad only)

Mn01

Parameter

no.

0100

Value to be

set

UOM

29 30

SA3

INSTALLER CONNECTIONS

24 AWR-MTD2-XE EN 11/2010

U I A

SA5 Deactivation contact for excess power consumption

The heat pump accepts an external deactivation signal from contact SA5 if a power consumption management system is used to disconnect devices based on set priority, thus avoiding activation of the contactor on the power meter. Configure the contact, selecting the desired function by setting parameter 015D:

Contact closed: heat pump operation not allowed. Contact open: heat pump operation allowed.

33 34

SA5

33 34

SA5

SA5 Reduced electricity rate contact

Forced refilling of the reserve storage tanks can be activated based on different electricity rates during the day. During reduced rate periods, the heat pump can be forced on so as to heat the domestic hot water or system storage tank, where fitted. Configure the contact, selecting the desired function by setting parameter 015D:

Description

Enable the contact as: 0= Reduced electricity rate 1= Stop operation due to excess

power consumption

Mn01

Parameter

no.

015D

Value to be

set

UOM

Contact closed: forced operation during the reduced rate period. Contact open: heat pump operation at full electricity rate.

During operation at reduced electricity rate, contact closed, the domestic hot water set point is 50°C, as shown in the example, with the contact open it’s 47°C. This allows operation at a higher temperature, within the unit’s operating limits, exploiting the lower electricity cost.

Description

Enable the contact as: 0= Reduced electricity rate 1= Stop operation due to excess

power consumption Enable the set point as: 0= Economy 1= Comfort Set the value of the domestic hot water ECONOMY set point Set the value of the domestic hot water COMFORT set point

Mn01

Mn00

Parameter

no.

015D

0015

0022

0023

Value to be

set

Example

UOM

°C

25EN 11/2010 AWR-MTD2-XE

F3 System flow switch

System flow switch connection, compulsory component.

39 40

BT8 Domestic hot water storage temperature probe

The domestic hot water temperature inside the storage tank is measured using probe BT8

41 42

BT8

INSTALLER CONNECTIONS

I A

26 AWR-MTD2-XE EN 11/2010

INSTALLER CONNECTIONS

I A

ELECTRICAL PANEL LAYOUT AWR-MTD2-XE 0011÷0041 SINGLE-PHASE

C90051683E_00

FU3

QS1

QM1

KA1

KA6

KA7

KA15

FU1

FU5

FU6

TC1

A1 Radio interference suppresser A2 Peak limiter A3 Electronic controller A4 Fan control module A7 Electric heater actuator C1 Compressor start capacitor C2-3 Fan start capacitor FU1 System water pump protection fuse FU3 Fan protection fuse FU5 Auxiliary circuit protection fuse

FU6 Controller protection fuse TCI Autotransformer KA1 Compressor control relay KA6 Outlet heater or boiler relay KA7 Alarm/secondary pump/dehumidifier relay KA15 High pressure switch relay QM1 Compressor circuit breaker QS1 Door interlock disconnect switch

27EN 11/2010 AWR-MTD2-XE

INSTALLER CONNECTIONS

I A

ELECTRICAL PANEL LAYOUT AWR-MTD2-XE 0031÷0051 THREE-PHASE

C90051687E_00

FU3

QS1

QM1

KA6

KA7

KA15

FU1

FU5

FU6

TC1

KA2

KM1

A1 Radio interference suppresser A3 Electronic controller A4 Fan control module A7 Electric heater actuator C2-3 Fan start capacitor FU1 System water pump protection fuse FU3 Fan protection fuse FU5 Auxiliary circuit protection fuse FU6 Controller protection fuse TCI Autotransformer

KA2 Phase sequence control relay KA6 Outlet heater or boiler relay KA7 Alarm/secondary pump/dehumidifier relay KA15 High pressure switch relay KM1 Compressor contact QM1 Compressor circuit breake QS1 Door interlock disconnect switch

28 AWR-MTD2-XE EN 11/2010

ELECTRICAL PANEL LAYOUT AWR-MTD2-XE 0061 AND 0091 THREE-PHASE

INSTALLER CONNECTIONS

I A

C90051689E_00

KA2

QS1

FU6

KA6

KA7

KA15

TC1

FU5

FU1

QM1

KM1

FU3

A1 Radio interference suppresser A3 Electronic controller A4 Fan control module A7 Electric heater actuator C2-3-4 Fan start capacitor FU1 System water pump protection fuse FU3 Fan protection fuse

FU5 Auxiliary circuit protection fuse FU6 Controller protection fuse TCI Autotransformer KA2 Phase sequence control relay KA6 Outlet heater or boiler relay KA7 Alarm/secondary pump/dehumidifier relay KA15 High pressure switch relay

KM1 Compressor contact QM1 Compressor circuit breaker QS1 Door interlock disconnect switch

29EN 11/2010 AWR-MTD2-XE

INSTALLER CONNECTIONS

I A

SINGLE-PHASE WIRING DIAGRAM AWR-MTD2-XE 0011÷0041

C65403050E_03

U-N

230V

ﬁ

50Hz

L-N

QS1

INSTALLER TERMINAL BLOCK

2 0

4 4 5

7474

ﬁ

4321

brown black blue

EV1

40 38

white

6721

BP1

321

543

2 0

7575

ﬁ

4321

brown black blue

EV2

YV1

98A

FU6

KA1

KA15

SA3

920

HL1

230VAC 1A MAX

F2 F1

FU1

2 0

RX-/TX-RX+/TX+

GND

ﬁ

green

BT7

+po

BT2

+to

BT1

+to

6543

SA1 SA5

334372

8 2

FU5

blue

brown

white

blue

black

+to

BT8

YV5 KM2

KA15

456 D

403842

454545

252525

474747

464646

KA1

23 24

HL2

GG0

GND DI3

B2 B4 GNDB1NO5C2

.J12

GND

RX+/TX+ RX-/TX-

J10

NO1NO3 NO2

DI7 DI2 DI1.

.. .. . ...... ....

... .....

NO6

J13

.DI4

DI6

+Vdc

GND

J4 J2

DI5

RX-/TX-

RX+/TX+

GNDVout

NO4

NC7

2424

LOAD

L N

FU3

KA15

444444

25 26

SA2

35 50 5050

+5Vref

black

DIC1

38 38

+to

BT9

+to

BT11

KM4

J14

C3 NO7

NO4

KA6

KA7

67119

38 38

444

3838

61 61

QF1

I d

Com

1Y2

2143

68 69

230VAC

24VAC

8 0

RX-/TX-

RX+/TX+

GND

Vout

BT12

GND

24V

54 55

4343

40 38

4 5

1L 1N

ﬁ

SRC

L1 N

SRC

KA1

BN BN

BK BK

QM1

KA1

TC1

47 48 49 50 51 52 5339 40 41 42 43 44 45 46

A1 Radio interference suppresser

A2 Compressor start

A3 Electronic controller

A4 Fan control module

A5 User interface

A7 Drain pan heater actuator

BP1 Condenser/evaporator control pressure transducer

BT1 Heat exchanger water inlet temperature probe

BT2 Heat exchanger water outlet temperature probe

BT7 Unit control air temperature probe

BT8 Hot water storage temperature probe

BT9 Storage tank probe

BT11 Outside air temperature probe for set point management

C1 Compressor start capacitor

C2-3 Fan start capacitor

E1 Water pump

EV1-2 Fan

F1 High pressure switch

F2 Low pressure switch

F3 Flow switch

F4 Water differential pressure switch

FU1 System water pump protection fuse

FU3 Fan protection fuse

FU5 Auxiliary circuit protection fuse

FU6 Controller protection fuse

HL1 Alarm indicator light / Dehumidifier/high temperature

zone 1

HL2 Compressor ON indicator light

KA1 Compressor control relay

KA6 Outlet heater / boiler relay

KA7 Alarm / secondary pump / dehumidification relay

KA15 High pressure switch relay

KM2 Outlet heater / boiler contactor

KM4 DHW storage heater control contactor

QF1 Unit circuit breaker

QM1 Compressor circuit breaker

QS1 Door interlock disconnect switch

R1 Compressor oil sump heater

R2 Heat exchanger frost protection heater

R5 Drain pan frost protection heater

SA1 Remote on-off switch input

SA2 Summer-winter switch input

SA3 Input to enable DHW only / system + DHW

SA5 Input for demand limit / low energy rate contactor

TC1 230/24 VAC transformer

YV1 Reversing valve

YV5 3-way valve (system/DHW)

Z1 Compressor

1 Not supplied

2 Optional

3 Sizes 0031-0041 only

30 AWR-MTD2-XE EN 11/2010

INSTALLER CONNECTIONS

I A

THREE-PHASE WIRING DIAGRAM AWR-MTD2-XE 0031÷0051

C65403051E_02

U-V-W-N

400V-3N ~ 50Hz

L1-L2-L3-N

QS1

INSTALLER TERMINAL BLOCK

2 0

4 4 5

7474

ﬁ

4321

brown black blue

EV1

40 38

white

6721

BP1

321

543

2 0

7575

ﬁ

4321

brown black blue

EV2

YV1

98A

FU6

KM1

KA15

SA3

920

HL1

230VAC 1A MAX

F2 F1

FU1

2 0

RX-/TX-RX+/TX+

GND

1ﬁ

green

BT7

+po

BT2

+to

BT1

+to

6543

SA1 SA5

334372

8 2

FU5

blue

brown

white

blue

black

21 41

+to

BT8

YV5 KM2

KA15

456 D

403842

454545

252525

474747

464646

KM1

23 24

HL2

GG0

GND DI3 B2 B4 GNDB1NO5C2

.J12

GND

RX+/TX+ RX-/TX-

J10

NO1NO3 NO2

DI7 DI2 DI1.

.. .. . ...... ....

... .....

NO6

J13

.DI4

DI6

+Vdc

GND

J4 J2

DI5

RX-/TX-RX+/TX+

GNDVout

NO4

NC7

2424

LOAD

L N

FU3

KA15

444444

25 26

SA2

35 50 5050

9304

+5Vref

black

DIC1

38 38

42 44

+to

BT9

+to

BT11

KM4

J14

C3 NO7

NO4

KA6

KA7

67119

38 38

444

3838

61 61

ﬁ

T1 T2 T3

1L1

1L2

1L3

KM1

QM1

KA2

1L2

1L1

1L3

QF1

I d

KA2

Com

1Y2

2143

68 69

230VAC

24VAC

8 0

RX-/TX-

RX+/TX+

GND

Vout

BT12

GND

24V

54 55

4343

40 38

4 5

TC1

45 46 47 48 49 50 51 52 53

A1 Radio interference suppresser

A3 Electronic controller

A4 Fan control module

A5 User interface

A7 Drain pan heater actuator

BP1 Condenser/evaporator control pressure transducer

BT1 Heat exchanger water inlet temperature probe

BT2 Heat exchanger water outlet temperature probe

BT7 Unit control air temperature probe

BT8 Hot water storage temperature probe

BT9 Storage tank probe

BT11 Outside air temperature probe for set point management

BT12 Ambient temperature sensor

C2-3 Fan start capacitor

E1 Water pump

EV1-2 Fan

F1 High pressure switch

F2 Low pressure switch

F3 Flow switch

F4 Water differential pressure switch

FU1 System water pump protection fuse

FU3 Fan protection fuse

FU5 Auxiliary circuit protection fuse

FU6 Controller protection fuse

HL1 Alarm indicator light / Dehumidifier/high temperature

zone 1

HL2 Compressor ON indicator light

KA2 Phase sequence control relay

KA6 Outlet heater / boiler relay

KA7 Alarm / secondary pump / dehumidification relay

KA15 High pressure switch relay

KM1 Compressor contactor

KM2 Outlet heater / boiler contactor

KM4 DHW storage heater control contactor

QF1 Unit circuit breaker

QM1 Compressor circuit breaker

QS1 Door interlock disconnect switch

R1 Compressor oil sump heater

R2 Heat exchanger frost protection heater

R5 Drain pan frost protection heater

SA1 Remote on-off switch input

SA2 Summer-winter switch input

SA3 Input to enable DHW only / system + DHW

SA5 Input for demand limit / low energy rate contactor

YV1 Reversing valve

YV5 3-way valve (system/DHW)

Z1 Compressor

1 Not supplied

2 Optional

31EN 11/2010 AWR-MTD2-XE

INSTALLER CONNECTIONS

I A

THREE-PHASE WIRING DIAGRAM AWR-MTD2-XE 0061÷0091

C65403052E_03

FOR WIRING, PLEASE

SEE INSTRUCTION

SHEET

2222

DB5 6

U-V-W-N

400V-3N ~ 50Hz

U-V-W-N

L1-L2-L3-N

QS1

INSTALLER TERMINAL BLOCK

4 4 555

4321

brown black blue

EV1

40 38

white

BP1

321543

8787

9876

brown black blue

EV2

YV1

FU6

KM1

KA15

SA3

920

HL1

230VAC 1A MAX

F2 F1

FU1

RX-/TX-RX+/TX+

GND

green

BT7

+po

BT2

+to

BT1

+to

6543

SA1 SA5

334372

8 2

FU5

blue

brown

white

21 41

+to

BT8

YV5 KM2

KA15

456

403842

454545

252525

474747

464646

KM1

23 24

HL2

GG0

GND DI3 B2 B4 GNDB1NO5C2

.J12

GND

RX+/TX+ RX-/TX-

J10

NO1NO3 NO2

DI7 DI2 DI1.

.. .. . ...... ....

... .....

NO6

J13

.DI4

DI6

+Vdc

GND

J4 J2

DI5

RX-/TX-RX+/TX+

GNDVout

NO4

NC7

2424

LOAD

L N

FU3

KA15

444444

25 26

SA2

35 50 5050

9304

+5Vref

black

DIC1

38 38

42 44

+to

BT9

+to

BT11

KM4

J14

C3 NO7

NO4

KA6

KA7

67119

38 38

444

3838

61 61

T1 T2 T3

1L1

1L2

1L3

KM1

QM1

1 L2

KA2

1L2

1L1

1L3

QF1

I d

KA2

Com

1Y2

2143

68 69

230VAC

24VAC

8 0

GND

24V

54 55

4343

40 38

4 5

TC1

45 46 47 48 49 50 51 52 53

4 4 5

7474

4321

brown black blue

7575

2 1

EV3

A1 Radio interference suppresser

A3 Electronic controller

A4 Fan control module

A5 User interface

A7 Drain pan heater actuator

BP1 Condenser/evaporator control pressure transducer

BT1 Heat exchanger water inlet temperature probe

BT2 Heat exchanger water outlet temperature probe

BT7 Unit control air temperature probe

BT8 Hot water storage temperature probe

BT9 Storage tank probe

BT11 Outside air temperature probe for set point management

C2-3-4 Fan start capacitor

C5 Noise suppression filter

E1 Water pump

EV1-2-3 Fan

F1 High pressure switch

F2 Low pressure switch

F3 Flow switch

F4 Water differential pressure switch

FU1 System water pump protection fuse

FU3 Fan protection fuse

FU5 Auxiliary circuit protection fuse

FU6 Controller protection fuse

HL1 Alarm indicator light / Dehumidifier/high temperature

zone 1

HL2 Compressor ON indicator light

KA2 Phase sequence control relay

KA6 Outlet heater / boiler relay

KA7 Alarm / secondary pump / dehumidification relay

KA15 High pressure switch relay

KM1 Compressor contactor

KM2 Outlet heater / boiler contactor

KM4 DHW storage heater control contactor

QF1 Unit circuit breaker

QM1 Compressor circuit breaker

QS1 Door interlock disconnect switch

R1 Compressor oil sump heater

R2 Heat exchanger frost protection heater

R5 Drain pan frost protection heater

SA1 Remote on-off switch input

SA2 Summer-winter switch input

SA3 Input to enable DHW only / system + DHW

SA5 Input for demand limit / low energy rate contactor

YV1 Reversing valve

YV5 3-way valve (system/DHW)

Z1 Compressor

1 Not supplied

2 Optional

3 Size 0091 only

32 AWR-MTD2-XE EN 11/2010

Data measured in the following conditions: (1) Water in-out 30/35°C (plant side), outdoor air temperatur 7°C b.s./ 6°C b.u. (2) Total input is obtained from compressor input and fan input. (3) Water in-out 23/18°C (plant side), outdoor air temperature 35°C b.s. (4) Water in-out 40/45°C (plant side), outdoor air temperature 7°C b.s./ 6°C b.u. (5) Water in-out 12/7°C (plant side), outdoor air temperature 35°C b.s. (6) Sound power level according to ISO 9614 and Eurovent 8/1 (7) Average sound pressure level above one reflecting surface (Q=2) at 1 meter from the outside dimensions of the unit.

GENERAL TECHNICAL DATA

I A

AWR MT2 XE 0011 0025 0031 0041 0031 0041 0051 0061 0091

Heating capacity (1) kW 6,3 7,4 11,2 14 10,9 14 15,9 17,9 25,1 Power input (2) kW 1,5 1,8 2,6 3,3 2,6 3,3 3,8 4,2 6 COP Eurovent 4,23 4,23 4,26 4,19 4,18 4,19 4,14 4,28 4,19 COP EN14511 4,13 4,15 4,22 4,16 4,15 4,15 4,11 4,25 4,19 Heating capacity (3) kW 6,1 7,3 10,8 13,6 10,6 13,8 15,4 17,5 24,6 Power input (2) kW 1,9 2,3 3,3 4,1 3,2 4,3 4,6 5,2 7,4 COP Eurovent 3,29 3,24 3,32 3,29 3,28 3,25 3,35 3,38 3,32 Rated water flow (1) m3/h 1,1 1,3 1,9 2,4 1,9 2,4 2,8 3,1 4,3 Useful pressure head (1) kPa 50 45 87 67 87 67 53 54 104 Cooling capacity (4) kW 7,2 8,3 12,3 15,7 11,7 15,8 17,7 20,2 29,2 Power input (2) kW 1,9 2,2 3,3 4,1 3,1 4,2 4,7 5,3 7,8 EER Eurovent 3,79 3,77 3,73 3,83 3,77 3,76 3,77 3,81 3,74 EER EN 14511 3,82 3,82 3,81 3,84 3,84 3,81 3,81 3,81 3,85 Cooling capacity (5) kW 5,2 6,3 9,2 11,7 8,6 11,9 13,2 15,2 22,1 Power input(2) kW 1,7 2,2 3,1 4 3 4 4,6 5 7,2 EER Eurovent 3,06 2,86 2,97 2,93 2,87 2,98 2,87 3,04 3,07 ESEER 3,62 3,63 3,52 3,46 3,42 3,65 3,24 3,55 3,57 Rated water flow(4) m3/h 1,2 1,4 2,1 2,7 2 2,7 3,1 3,5 5 Useful pressure head(4) kPa 43 40 80 55 80 55 43 42 88 No. of fans n° 1 1 2 2 2 2 2 2 3 Air flow m3/s 1,08 1,08 1,8 1,9 1,8 1,9 1,9 2,01 3 Type of compressor SCROLL Number of compressors n° 1 1 1 1 1 1 1 1 1 Number of circuits n° 1 1 1 1 1 1 1 1 1 Refrigerant R410a Kg

2,55 2,9 3,5 4,35 3,5 4,35 4,5 6,1 8,5

Oil Mobil EAL ARTIC 22cc Kg

0,7 0,7 1,2 1,2 1,2 2,0 1,7 1,8 3,2

Type of pump Circulator Number pumps n° 1 1 1 1 1 1 1 1 1 Operating weight kg 145 150 155 170 155 170 180 250 335 Water fittings inches 1 1 1 1-1/4 1 1-1/4 1-1/4 1-1/4 1-1/4 Sound power (6) dB(A) 69 69 71 71 71 71 71 72 74 Sound pressure (7) dB(A) 54 54 56 56 56 56 56 57 59 Power supply V/ph/Hz 230~50 400-3N~50

33EN 11/2010 AWR-MTD2-XE

Outside air temperature (°C)

Outlet water temperature (°C)

-20

-15

-10

-5

25 30 35 40 45 50 55 60

Water temperature head min/max= 3/8 °C Water circuit pressure min/max = 1/3 bar Maximum glycol percentage = 40%

HEATING

U I A

OPERATING LIMITS

I A

Outside air temperature (°C)

Outlet water temperature (°C)

-15 -10 -5 0 5 10 15 20 25 30

COOLING

AWR-MTD2-XE EN 11/2010

The pressure head refers to the values at the fittings.

U I A

PUMP CURVE

I A

CHARACTERISTICS AVAILABLE PRESSURE HEAD IN SYSTEM CIRCUIT

0 0,5 1 1,5 2 2,5

Curve 4

Curve 3

Curve 2

Curve 1

Useful pressure head [kPa]

Water flow-rate [m3/h]

AWR MTD2 XE 11 ms

0 0,5 1 1,5 2 2,5

Curve 4

Curve 3

Curve 2

Curve 1

Useful pressure head [kPa]

Water flow-rate [m3/h]

AWR MTD2 XE 25 ms

100

120

0 1 2 3 4

Curve 4

Curve 3

Curve 2

Curve 1

Useful pressure head [kPa]

Water flow-rate [m3/h]

AWR MTD2 XE 31 ms - AWR MTD2 XE 31 t

100

120

0 1 2 3 4

Curve 4

Curve 3

Curve 2

Curve 1

Useful pressure head [kPa]

Water flow-rate [m3/h]

AWR MTD2 XE 41 ms - AWR MTD2 XE 41 t

35EN 11/2010 AWR-MTD2-XE

The pressure head refers to the values at the fittings.

U I A

PUMP CURVE

I A

CHARACTERISTICS AVAILABLE PRESSURE HEAD IN SYSTEM CIRCUIT

100

120

0 1 2 3 4

Curve 4

Curve 3

Curve 2

Curve 1

Useful pressure head [kPa]

Water flow-rate [m3/h]

AWR MTD2 XE 51 t

100

120

0 1 2 3 4 5

Curve 4

Curve 3

Curve 2

Curve 1

Useful pressure head [kPa]

Water flow-rate [m3/h]

AWR MTD2 XE 61 t

100

120

0 1 2 3 4 5 6 7 8 9

Curve 4

Curve 3

Curve 2

Curve 1

Useful pressure head [kPa]

Water flow-rate [m3/h]

AWR MTD2 XE 91 t

36 AWR-MTD2-XE EN 11/2010

0 OFF

CHECKING AND STARTING UP THE UNIT

CHECKS BEFORE STARTING THE UNIT

• the vibration damping feet are fitted

• inlet filters are fitted on the system

• suitably-sized expansion vessel and safety valve installed on the DHW circuit

• an expansion vessel is installed if the expansion vessel on the unit is undersized

• make sure vibration damper joints are installed on water connections

• a low-loss header is installed if the water content is insufficient

• make sure the position of the outside air probe corresponds to the instructions shown in the manual

• make sure the position of the room control unit corresponds to the instructions shown in the manual

• make sure that the electrical power available is adequate for the unit installed

• make sure the non-return valve is installed on the DHW circuit

PREPARING FOR FIRST START UP

The unit must be started up for the first time by the Technical Service. Before starting up the unit, make sure that:

• the unit has been properly installed as described in this manual

• 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;

• All water connections are tight.

• Make sure the water circuit has been washed and drained.

• The water circuit is filled and vented.

• Make sure there is no air in the system. If necessary vent the system using the vent valve. If venting after operation in heat pump mode, be careful as the water may be hot;

• 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;

• Make sure that unbalance between phases is less than 3%, for three-phase units.

• The unit is correctly earthed;

• All electrical connections are tight.

• make sure that the outside air and water temperature are within the unit operating limits shown in this manual.

Before starting up, power up the unit for at least two hours by switching QF1 and QS1 to ON (see the wiring diagram) to allow the oil in the compressor sump to heat up.

STARTING UP FOR THE FIRST TIME

Before starting the unit:

• Make sure the switch QF1 is in the OFF position, Fig. 1.

• Make sure the contact of the on/off device SA1 (see the wiring diagram) is open (if featured).

• Make sure the “A5” room controller is off.

• Position the main unit switch QS1 in the ON position, Fig.

• Move switch QF1 (outside the unit) to “ON”, Fig. 3.

OFF

37EN 11/2010 AWR-MTD2-XE

mode

CHECKING AND STARTING UP THE UNIT

• Once having powered up the heat pump, the display on the room control unit shows this message (1):

• Followed by (2):

• Wait a few minutes, the unit is ready to operate when the display shows (3):

Before starting up, power up the unit for at least two hours, with the compressor off, so as to allow the oil in the compressor sump to heat up.

When commissioning the heat pump, the user must configure the type of system. See the chapter “System configuration”, check the application diagrams that the control unit is able to manage.

• Set the current date and time on the A5 room controller

• Configure the type of system and the number of A5 room controllers. See the chapter "System configuration".

• Switch on the unit by pressing button 3

• Select the required operating mode by pressing button 5

• Select the required room temperature by turning knob 4

For further information on the operation and functions of the room controller, see "Operation and functions of the room controller".

A5 room controller

38 AWR-MTD2-XE EN 11/2010

DESCRIPTION OR ROOM CONTROLLER BUTTONS AND DISPLAY

BUTTONS

mode

NO. Description

1 Temperature and humidity probe 2 Domestic hot water (DHW) production button

ON/OFF button ESC button in parameter programming mode Knob

4 - Turning: scroll room temperature values,

parameters and menus

- Pressing: Confirm settings 5 Select operating mode button 6 Set time bands button 7 Backlit display

N° Description Symbol

1 Operating mode

2 Main field

3 Temperature unit of measure

4 Set point

5 Relative humidity

6 Time band

7 Day of the week

8 Actuator operating

9 Secondary field

10 Active time band

Function

Heating

Cooling

automatic mode changeover based on outside air temperature

Domestic hot water production enabled

Room temperature/humidity, room set point, parameter val-

ue display

On indicates room set point programming

Indicates the type of active time band

error message

system pump active

- flashing: compressor timer, delay

- fixed: compressor active

Defrost active

Fan active

Boiler or electric heater active

Frost protection active

Time, menu, parameter number display

On indicates active time band

DISPLAY

39EN 11/2010 AWR-MTD2-XE

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

Symbol Meaning

Press and release

Hold for 3 seconds

Turn the knob

x3 sec.

Meaning of the symbols

Display

During normal operation of the unit, the display shows the following information:

Additional information displayed

During operation of the unit, pressing the knob displays the information described below.

Press the knob Room temperature set point

Press the knob

Humidity set point

Press the knob

1 operating mode selected 2 domestic hot water production enabled 3 room temperature 4 hour and minutes 5 day

Outside air temperature

Press the knob

Domestic hot water set point

Press the knob

Room humidity

Press the knob

AWR-MTD2-XE EN 11/2010

x3 sec.

Setting the time and date

** Mon = Lunedi, Tue = Martedi, Wed = Mercoledi, Thu = Giovedi, Fri = Venerdi, Sat = Sabato, Sun = Domenica

Press the button for 3 seconds

Press the knob

• The hours flash

• Turn the knob to select the hour value

• Press the knob to confirm • The minutes flash

• Turn the knob to select the minutes value

• Press the knob to confirm

• The day flashes

• Turn the knob to select the day**

• Press the knob to confirm

• Press the button to exit.

• Main display

1 2 3

4 5 6

7 8 9

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

41EN 11/2010 AWR-MTD2-XE

x3 sec.

** The heat pump is not yet operating, the mode has to be selected: heating, cooling, auto or domestic hot water production.

** AUTO automatic mode changeover based on the outside air temperature

ZONE OFF

Press the button for 3 seconds

ZONE ON**

Selecting the operating mode

No operating mode selected. Heat in OFF.

None Automatic mode changeover Cooling Heating

• Press the mode button

• AUTOMATIC** mode changeover selected

• Press the mode button

• COOLING mode selected

• Press the mode button

• HEATING mode selected

Selecting the room temperature set point

• Turn the knob

• The room temperature set point is displayed

• Turn the knob to change the room temperature set point

• Wait a few seconds for confirmation

• The display shows the room temperature

1 2 3

1 2 3 4

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

Switching ON

The button enables operation of the pump or the zone valve controlled by the room controller, the heat pump is activated by selecting the operating mode using the button, as shown below.

42 AWR-MTD2-XE EN 11/2010

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

Domestic hot water production not enabled

Press the .

• Domestic hot water production enabled

• The symbol is displayed

Domestic hot water production

Selecting the domestic hot water set point

The domestic hot water temperature is measured by the probe installed inside the DHW storage tank.

x3 sec.

• Press thei + buttons together for 3 seconds

• Turn the knob and select the value of parameter 012

• Press the knob to confirm • Press the knob to confirm • Turn the knob and select parameter 0023

• Press the knob • Turn the knob to select the domestic hot water set point

• Press the knob to confirm

1 2 3

4 5 6

7 8 9

➔

1 2 3

43EN 11/2010 AWR-MTD2-XE

• Press the button twice until reaching the main display.

• Main display

10 11

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

44 AWR-MTD2-XE EN 11/2010

Time band 1

Time band 2 Time band 3 Time band 4 Time band 5 Time band 6

Programming the time bands

The room controller can customise on/off times for each zone in the system, based on six time bands. The six time bands are identified by the following symbols, selected by turning the knob:

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

x5 sec.

• Press the button for 5 seconds

• Turn the knob • Press to confirm

GROUP OF 7 DAYS A Turn the knob B Press the knob to confirm

GROUP OF 5 DAYS A Turn the knob B Press the knob to confirm

GROUP OF 2 DAYS A Turn the knob B Press the knob to confirm

INDIVIDUAL DAY A Turn the knob B Press the knob to confirm

Time band 1

• Press the knob to confirm

Time band 1 start hours A Turn the knob B Press the knob to confirm the

hour value

Time band 1 start minutes A Turn the knob B Press the knob to confirm the

minutes value

Time band 1 room temp. set point A Turn the knob B Press the knob to confirm

The time bands can be programmed by selecting the days in preset groups or for each individual day.

The time bands on systems with multiple zones, each of which is managed by its own room controller (maximum 6), must be programmed on each room controller.

For installations with heap pump connected directly to the system, without storage tanks and secondary pumps, parameter 011D must be set to 0. This means that heat pump operation will be managed based on the time bands.

1 2 3

4 5 6 7

8 9 10 11

45EN 11/2010 AWR-MTD2-XE

Time band 2

• Press the knob to confirm

Continue as described from step 8 to step 11 to set the hours, minutes and room temperature set point for the other time bands

Once the time bands have been set

A Turn the knob and select ESC B Press to confirm

• Press the button twice until reaching the main display.

• Main display

8 + 9 .... 10 .... 11 12 13 14

Press the button to exit programming mode

Time band program example

Below is an example of a time band program with two temperature levels, Comfort 20°C, Economy 18°C, and OFF.

Time

band 1

Time

band 2

Time

band 3

Time

band 4

Time

band 5

Time

band 6

OFF

18°C

20°C

4 8 12 16 20 24

Activating time bands

• Press the button. • The symbol is displayed

• Time band ACTIVE

1 2

Deactivating time bands

• Press the button. • The symbol is no longer displayed

• Time band DEACTIVATED

1 2

Once the time bands have been deactivated check that the room set point is at the required value, otherwise turn the knob to select the desired temperature.

46 AWR-MTD2-XE EN 11/2010

ACCESSING THE PROGRAMMING LEVELS

The room controller has a menu structure, divided into levels so as to allow access only to authorised users, as shown below:

Procedure for accessing the menu

x3 sec.

• Main display

• Press the + buttons together for 3 seconds

• Turn the knob and select the password (as shown in the table)

1 2 3

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

➔

Unit ON - ZONE ON

• Press the button for 3 seconds

Unit OFF - ZONE OFF

x3 sec.

1 2 3

Switching OFF

The button disables operation of the pump or the zone valve controlled by the room controller, the heat pump is deactivated using the button, as shown in " Selecting the operating mode".

Level Password Menu description Menu code

User 012 Room unit Mnu00

Installer

022 Zone room terminal address setting Addr

034

System configuration Mnu01 DHW Mnu02 Supplem. sources Mnu03 Cascade/Forced fan Mnu04 Primary and DHW exchanger Mnu06 input / output Mnu09

Authorised technical service Contact Manufacturer

Compressor Mnu05 Source heat exchanger Mnu07 Defrost Mnu08 Alarm log Mnu11 Serial protocol Mnu12

47EN 11/2010 AWR-MTD2-XE

• Press the knob • The parameter value flashes

• Turn the knob to change the parameter value

• Press the knob to confirm

• Press the button twice until reaching the main display

• Main display

7 8 9

4 5 6

10 11

OPERATION AND FUNCTIONS OF THE ROOM CONTROLLER

• Press the knob to confirm A

Turn the knob to select the menu

B Press the knob to confirm

• Turn the knob and select the parameter to be set

Press the button to exit programming mode

48 AWR-MTD2-XE EN 11/2010

CONTROL AND OPERATING CHARACTERISTICS

Temperature control

The heating or cooling circuit water temperature is calculated by the controller and depends on the following factors: A) system water set point compensation in heating or cool-

ing (see paragraph)

B) room temperature influence (see paragraph) C) minimum and maximum heating water temperature limit

(see paragraph)

D) room temperature set point

The compensation curves in HEATING are divided into:

• SYSTEM curve: determines the set point for heat pump operation and any high temperature zones. The set point calculated refers to the heat pump return water temperature. The water outlet temperature is usually 5°C higher than the return temperature. This temperature difference may change depending on the flow-rate and the type of system. Make sure that the temperature difference is within the limits required by the manufacturer.

• ZONE curve determines the water outlet temperature in the mixed circuit.

For systems configured with mixed zones, the SYSTEM curve and ZONE curve must be selected.

The system and zone curve work in cascading, the mixed zone curve may therefore not request a higher value than the one supplied by the system curve.

A) System water temperature set point compensation

The water temperature set point in heating or cooling is calculated based on the outside temperature trend according to settable curves.

Water set point compensation diagram in HEATING

The compensation curve in heating mode can be modified to allow correct heat pump operation depending on the heating system used (radiant panels, radiators, fan coils).

Example: Selecting heating curve 1.4 with an outside air temperature of -5°C gives a water temperature of +55°C.

A heating curve that is too high gives an excessive outlet temperature, a curve that is too low may mean the desired room temperature is not reached.

The curve can be set separately for each zone, depending on the type of room terminal. The following compensation curves are recommended:

-25 -5

Water set point °C

Outside air temp. °C

2,2

1,8

1,6

1,4

1,2

0,8

0,6

0,4

0,2

Type of terminal Compensation curve number Radiant panels 0.25÷0.7 Fan coils 0,9÷1,1 Radiators 1,2÷1,5

Description

Enable SYSTEM compensation curve 0= Disabled 1= Enabled SYSTEM compensation curve number

Enable compensation curve zone LT1 0= Disabled 1= Enabled Compensation curve number zone LT1

Enable compensation curve zone LT2 0= Disabled 1= Enabled Compensation curve number zone LT2

Enable compensation curve zone LT3 0= Disabled 1= Enabled Compensation curve number zone LT3

Mn01

Parameter

no.

0152

0159

0167

0174

0182

0189

015E

012A

Default

0,8

0,7

UOM

49EN 11/2010 AWR-MTD2-XE

CONTROL AND OPERATING CHARACTERISTICS

-2.5

-40

-30

-20

-10

2 -1,5 -1 -0,5 0 0,5 1 1,5 2

DT (Room temperature °C - Room set point °C)

System or zone water temperature deviation (°C)

Example referred to compensation curve 1.0

10 % 25 %

50 %

75 % 99 %

Outlet set point with room temp. 20°C

Outside temp. (°C)

100

15 10 5 0 -5 -10 -15 -20 -25 -30

Outlet temp. (°C)

Description

MINIMUM set point limit for SYSTEM curve MAXIMUM set point limit for SYSTEM curve

MINIMUM outlet set point limit for compensation curve in zone LT1 MAXIMUM outlet set point limit for compensation curve in zone LT1

MINIMUM outlet set point limit for compensation curve in zone LT2 MAXIMUM outlet set point limit for compensation curve in zone LT2

MINIMUM outlet set point limit for compensation curve in zone LT3 MAXIMUM outlet set point limit for compensation curve in zone LT3

Mn01

Parameter

no.

0165

0166

0180

0181

0195

0196

012F

012G

Default

UOM

°C

C) System water temperature limits in HEATING

These define the temperature limits (minimum and maximum) that can be requested from the circuit and never exceeded. In the figure the minimum limit is 30°C and the maximum is 40°. Between 30 and 40°C the water temperature will be able to vary based on the trend in outside temperature.

For systems configured with mixed zones, the limits for the SYSTEM curve and ZONE curve must be selected.

B) Room temperature influence in HEATING

The compensation curve determines the heating water temperature; this may then be corrected based on the difference between the desired room set point and the actual room temperature. The correction made to the water temperature depends on the “Room Authority” coefficient. The higher the value of the Room Authority the higher the correction to the system water temperature, and vice-versa.

This allows the water temperature to adapt quickly to changes in the conditions inside the room.

The function can only be ENABLED if the A5 room controller is positioned in the room and used to measure the reference temperature.

Set authority values for the SYSTEM equal to or greater than those for zones LT1, LT2, LT3.

Enabling room temperature influence on SYSTEM deviates the calculated heat pump return water temperature set point.

Enabling room temperature influence on ZONE LT1, LT2, LT3 deviates the calculated water outlet temperature set point to the system, controlled by the mixing valve.

Description

Enable room temperature influence on SYSTEM 0= Disabled 1= Enabled SYSTEM Room Authority

Enable Room temperature influence on LT1 0= Disabled 1= Enabled LT1 Room Authority

Enable Room temperature influence on LT2 0= Disabled 1= Enabled LT2 Room Authority

Enable Room temperature influence on LT3 0= Disabled 1= Enabled LT3 Room Authority

Mn01

Parameter

no.

0162

0164

0178

0179

0193

0194

012D

012E

Default

UOM

50 AWR-MTD2-XE EN 11/2010

CONTROL AND OPERATING CHARACTERISTIC

Description

Enable SYSTEM compensation curve 0= Disabled 1= Enabled Maximum return temperature set point limit in cooling mode (Tm1) Minimum outside temperature corresponding to max.

return

temperature (Te1) Minimum return temperature set point limit in cooling mode (Tm2) Maximum outside temperature corresponding to min. return temperature (Te2) Enable compensation curve zone LT1 0= Disabled 1= Enabled Maximum outlet temperature set point limit in cooling mode (Tm1) Minimum outside temperature corresponding to max. outlet temperature (Te1) Minimum outlet temperature set point limit in cooling mode (Tm2) Maximum outside temperature corresponding to min. outlet temperature (Te2) Enable compensation curve zone LT2 0= Disabled 1= Enabled Maximum outlet temperature set point limit in cooling mode (Tm1) Minimum outside temperature corresponding to max. outlet temperature (Te1) Minimum outlet temperature set point limit in cooling mode (Tm2) Maximum outside temperature corresponding to min. outlet temperature (Te2) Enable compensation curve zone LT3 0= Disabled 1= Enabled Maximum outlet temperature set point limit in cooling mode (Tm1) Minimum outside temperature corresponding to max. outlet temperature (Te1) Minimum outlet temperature set point limit in cooling mode (Tm2) Maximum outside temperature corresponding to min. outlet temperature (Te2)

Mn01

Parameter

no.

0154

0128

0129

0130

0131

0169

0132

0133

0134

0135

0184

0136

0137

0138

0139

011T

012H

012J

012L

012M

Default

UOM

°C

Description

Enable compensation for room humidity, SYSTEM 0= Disabled 1= Enabled Room relative humidity value to start increasing SYSTEM water return temperature set point Maximum return temperature hysteresis corresponding to 100% relative humidity Enable compensation for room humidity, ZONE LT1 0= Disabled 1= Enabled Room relative humidity value to start increasing water outlet temperature set point ZONE LT1 Maximum outlet temperature hysteresis corresponding to 100% relative humidity Enable compensation for room humidity, ZONE LT2 0= Disabled 1= Enabled Room relative humidity value to start increasing water outlet temperature set point ZONE LT2 Maximum outlet temperature hysteresis corresponding to 100% relative humidity Enable compensation for room humidity, ZONE LT3 0= Disabled 1= Enabled Room relative humidity value to start increasing water outlet temperature set point ZONE LT2 Maximum outlet temperature hysteresis corresponding to 100% relative humidity

Mn01

Parameter

no.

0156

0157

0158

0171

0172

0173

0186

0187

0188

012N

012P

012R

Default

UOM

°C

The compensation curves in COOLING are divided into:

• SYSTEM curve: determines the set point for heat pump operation and any high temperature zones. The set point calculated refers to the heat pump return water temperature. The water outlet temperature is usually 5°C lower than the return temperature. This temperature difference may change depending on the flow-rate and the type of system. Make sure that the temperature difference is within the limits required by the manufacturer.

• ZONE curve determines the water outlet temperature in the mixed circuit.

For systems configured with mixed zones, the SYSTEM curve and ZONE curve must be selected. The system and zone curve work in cascading, the mixed zone curve may therefore not request a higher value than the one supplied by the system curve.

Water set point compensation diagram in COOLING

The compensation curve in cooling mode can be modified to allow correct heat pump operation depending on the cooling system used (radiant panels, fan coils). Points T1 and T2 correspond to two outside temperature values that respectively identify the maximum and minimum system water temperature.

Te2 Outside temp.Te1

Tm2

Tm1

Water set point

Maximum room humidity compensation

The water temperature set point, calculated based on the compensation curve, can be compensated according to the maximum relative humidity in the room. The water temperature value can increase so as to avoid possible formation of condensate in the radiant cooling systems (underfloor, ceiling, wall, etc.).

If the relative humidity measured by the A5 room unit A5 exceeds the value set for parameter 0157, 0172, 0187, the water temperature set point increases until reaching the maximum temperature. The maximum water temperature is the set point calculated according to the compensation curve in cooling mode plus the value set for parameter 0158, 0173, 0188.

Enabling room humidity compensation on SYSTEM deviates the calculated heat pump return water temperature set point. Enabling room humidity compensation on ZONE LT1, LT2, LT3 deviates the calculated water outlet temperature set point to the system, controlled by the mixing valve.

100% UR%Value parameter 0157 Value parameter 0172 Value parameter 0187

Room humidity (RH%)

Value: parameter 0158 parameter 0173 parameter 0188

Temperature hysteresis (°C)

51EN 11/2010 AWR-MTD2-XE

CONTROL AND OPERATING CHARACTERISTICS

Automatic mode changeover based on outside temperature

In mode, the operating mode (heating / cooling) changes automatically, avoiding the need for the user to change the mode manually. Mode changeover is based on the diagram shown in the figure.

The centre zone A corresponds to an area of inactivity, as the outside climate conditions mean neither heating nor cooling is required.

Description

Automatic mode changeover set point in HEATING Automatic mode changeover differential in HEATING Automatic mode changeover set point in COOLING Automatic mode changeover differential in COOLING

Mn01

Parameter

no.

0106

0107

0108

0109

Default

UOM

°C

0106= 16°C

0106+0107=18°C

Heating

OFF

Cooling

0108-0109=24°C

Outside temp.

0108=26°C

System pump operation

When reaching the system water set point, the compressor stops and the system pump is activated periodically, so as to minimise energy consumption. Pump operating time can be selected using parameter 0147, while the interval between one sniffing cycle and the next is set using parameter 0148. Intermittent activation of system pump operation can be selected using parameter 0143 (0= system pump always on to, 1=system pump activated at intervals). In systems with fan coils, the time between one sniffing cycle and the next should be reduced in order to avoid cooling excessive of the water, and if the system water content is equal to the minimum value shown in the paragraph on "water connections", parameter 0143 should be set to 0.

52 AWR-MTD2-XE EN 11/2010

CONTROL AND OPERATING CHARACTERISTICS

U I A

Heat pump operation with fixed set point

System water set point compensation using the compensation curves can be disabled. To enable fixed set point operation, set parameter 0152=0 and 0154=0 The heat pump will operate based on the fixed return set point defined by parameters 0153 (Heating) and 0155 (cooling).

Description

Enable return set point in HEATING 0= Fixed set point in heating ENABLED 1= Fixed set point in heating DISABLED Fixed return water temperature set point in HEATING

Enable return set point in COOLING 0= Fixed set point in cooling ENABLED 1= Fixed set point in cooling DISABLED Fixed return water temperature set point in COOLING

Mn01

Parameter

no.

0152

0153

0154

0155

Default

UOM

°C

FROST PROTECTION

Frost protection based on system water temperature

The frost protection function is active even if the controller is in standby. To prevent the water freezing and damaging the plate heat exchanger, the microprocessor shuts down the compressor and activates the system heat exchanger heater if the temperature measured by the heat exchanger outlet temperature probe is than +4°C. The frost prevention temperature set point can only be modified by an authorised service centre, and only after verifying that the water circuit contains antifreeze. Tripping of this alarm shuts down the compressor but not the pump, which remains active. To reset normal operation, the water outlet temperature must rise to more than: +7°C on the system side. Reset is automatic.

Frost protection based on inside temperature

Frost protection on the heating circuit is always active, even when the heat pump is off. The heat pump and/or supplementary sources of heat (outlet heater or boiler) are activated if the room temperature falls below the value set for parameter 0140, to prevent the pipes inside the home from freezing.

Outside air T

OFF

Heat pump

0140 Inside temperature

1°C

Description

Inside temperature to enable frost protection

Mn01

Parameter

no.

0140

Default

UOM

°C

Frost protection based on outside air temperature

Frost protection on the heating and domestic hot water circuits based on outside air temperature is always active, even when the heat pump is off. The system and domestic hot water pumps are activated when the outside air temperature falls below the value set for parameter 0141.

Outside air T

OFF

System and DHW circuit water pump

0141 Outside air temperature to enable frost protection

1°C

Description

Outside temperature to enable frost protection

Mn01

Parameter

no.

0141

Default

UOM

°C

53EN 11/2010 AWR-MTD2-XE

SYSTEM CONFIGURATION

U I A

Parameter

0101

Mixed zone 1 Mixed zone 2 Mixed zone 3

High temperature zone 1 (fan coils /

radiators)

High temperature zone 2 (fan coils /

radiators)

High temperature zone 3 (fan coils /

radiators)

DHW

recircu-

lation

N-EM1

expansion

module

n°

Mn01

X 0

Mn01

X X 1

Mn01

X 1

Mn01

X X 1

Mn01

X X X2

Mn01

X X X 2

Mn01

X X X X 2

Mn01

X X X X 2

Mn01

X X X X X 2

Mn01

X X 2

Mn01

X X X 2

Mn01

X X X X 2

Mn01

X X X X X 3

Mn01

X X X X X X 3

Mn01

X X X X 3

Il controllore della pompa di calore permette la configurazione di 15 differenti tipologie di impianto selezionabili impostando il parametro 0101. La tabella seguente riporta gli impianti configurabili.

Configuration 0 does NOT require additional expansion modules Configurations from 1 to 3 require 1 additional N-EM1 expansion module Configurations from 4 to 11 require 2 additional N-EM1 expansion modules Configurations 12, 13 and 14 require 3 additional N-EM1 expansion modules The water connection and wiring diagrams for configurations from 1 to 14 are shown on the instruction sheet enclosed with the N-EM1 expansion module.

The parameters required for correct system operation can be set on the A5 room controller supplied with the heat pump.

The next few pages are divided into the following sections:

Section 1 WATER CIRCUIT DIAGRAM Section 2 WIRING DIAGRAM Section 3 PARAMETER CONFIGURATION

ZONA "1"

54 AWR-MTD2-XE EN 11/2010

SYSTEM CONFIGURATION

U I A

Heat pump connection to the system without low-loss header. Make sure the useful pressure head of the circulating pump on the unit is sufficient for the pressure drop in the system. If the minimum system content does not reach values shown in this manual, install an additional storage tank on the heat pump return pipe. No system configurations are required.

Water circuit diagram

CONFIGURATION "0"

AWR_MTD2_XE_0000.0

26/01/2011

REV_01

ZONE "1"

N.C.

ACS

APPLIANCES

PRESSURE GAUGE

THERMOMETER

FLOW SWITCH

VIBRATION DAMPER JOINT

SHUT-OFF VALVE

SAFETY VALVE WITH

PIPED DISCHARGE

CHECK VALVE

THERMOSTATIC MIXER

VENT VALVE

MEMBRANE EXPANSION

VESSEL

KEY TO THE SYMBOLS

DRAIN VALVE

CALIBRATING VALVE

HEAT PUMP OUTLET

HEAT PUMP RETURN

DOMESTIC HOT WATER

DOMESTIC COLD WATER

ELECTRICAL CONNECTIONS

INDICATES ACCESSORIES

(*) INSTALL A STORAGE TANK ON THE HEAT PUMP RETURN

IF THE SYSTEM WATER CONTENT IS LESS THAN THE VALUE DESCRIBED

IN THE TECHNICAL BULLETIN.

MEDIUM TEMPERATURE REVERSE-CYCLE UNIT, MODEL AWR MTD2 XE

RUBBER VIBRATION DAMPER KIT FOR FLOOR-STANDING

INSTALLATION

OUTSIDE AIR TEMPERATURE PROBE

(SUPPLIED AS STANDARD WITH THE HEAT PUMP)

REMOVABLE METAL MESH FILTER (1"1/4, 1"1/2 OR 2")

1”1/4 THREE-WAY SELECTOR VALVE FOR DHW PRODUCTION

DHW STORAGE TANK, MODEL HWC 300 OR HWC 500

STORAGE TANK FOR HEATED AND CHILLED WATER,

MODEL BT35, BT100 OR BT200 (*)

ELECTRIC HEATER KIT, 1-2-3 kW

ROOM UNIT (SUPPLIED AS STANDARD WITH THE HEAT PUMP)

N.B.: Typical water circuit diagram.

OUTSIDE INSIDE

LOW-LOSS

HEADER

SELF-CLEANING

FILTER

FROM WATER

MAINS

AUTOMATIC FILL

ASSEMBLY

“Y” FILTER

Water circuit diagram (not a working drawing)

55EN 11/2010 AWR-MTD2-XE

SYSTEM CONFIGURATION

U I A

Parameter configuration

Description Menu

Parameter

no.

Default

Write

set value

UOM

SYSTEM compensation curves in heating mode

Enable SYSTEM compensation curve

0= Disabled

1= Enabled

Mn01 0152 0 -

SYSTEM compensation curve number Mn01 0159 1 -

Enable room temperature influence on SYSTEM

0= Disabled

1= Enabled

Mn01 0163 0 -

SYSTEM Room Authority Mn01 0164 30 %

MINIMUM return set point limit for SYSTEM curve Mn01 0165 30 °C

MAXIMUM return set point limit for SYSTEM curve Mn01 0166 48 °C

SYSTEM compensation curves in cooling mode

Enable SYSTEM compensation curve

0= Disabled

1= Enabled

Mn01 0154 0 -

Maximum return temperature set point limit in cooling mode (Tm1) Mn01 0128 25 °C

Minimum outside temperature corresponding to max. return

temperature (Te1)

Mn01 0129 23 °C

Minimum return temperature set point limit in cooling mode (Tm2) Mn01 0130 23 °C

Maximum outside temperature corresponding to min. return

temperature (Te2)

Mn01 0131 36 °C

56 AWR-MTD2-XE EN 11/2010

SYSTEM CONFIGURATION

U I A

System number 0

Water circuit diagram

CONFIGURATION "0"

AWR_MTD2_XE_0000.1

26/01/2011

REV_01

ZONE "1"

N.C.

ACS

MEDIUM TEMPERATURE REVERSE-CYCLE UNIT, MODEL AWR MTD2 XE

HEAT PUMP OUTLET

HEAT PUMP RETURN

DOMESTIC HOT WATER

DOMESTIC COLD WATER

ELECTRICAL CONNECTIONS

INDICATES ACCESSORIES

RUBBER VIBRATION DAMPER KIT FOR FLOOR-STANDING

INSTALLATION

OUTSIDE AIR TEMPERATURE PROBE

(SUPPLIED AS STANDARD WITH THE HEAT PUMP)

REMOVABLE METAL MESH FILTER (1"1/4, 1"1/2 OR 2")

1”1/4 THREE-WAY SELECTOR VALVE FOR DHW PRODUCTION

DHW STORAGE TANK, MODEL HWC 300 OR HWC 500

ELECTRIC HEATER KIT, 1-2-3 kW

STORAGE TANK FOR HEATED AND CHILLED WATER,

MODEL BT35, BT100 OR BT200 (*)

HOT WATER RECIRCULATION

9 ROOM UNIT (SUPPLIED AS STANDARD WITH THE HEAT PUMP)

APPLIANCES

KEY TO THE SYMBOLS

PRESSURE GAUGE

THERMOMETER

FLOW SWITCH

VIBRATION DAMPER JOINT

SHUT-OFF VALVE

“Y” FILTER

SAFETY VALVE WITH

PIPED DISCHARGE

CHECK VALVE

THERMOSTATIC MIXER

VENT VALVE

MEMBRANE EXPANSION

VESSEL

DRAIN VALVE

CALIBRATING VALVE

N.B.: Typical water circuit diagram.

OUTSIDE INSIDE

LOW-LOSS

HEADER

SELF-CLEANING

FILTER

FROM WATER

MAINS

AUTOMATIC FILL

ASSEMBLY

Water circuit diagram (not a working drawing)

57EN 11/2010 AWR-MTD2-XE

SYSTEM CONFIGURATION

U I A

System number 0

Wiring diagram

CONFIGURATION "0"

AWR_MTD_XE_0000.1

26/01/2011

REV_01

ZONE "1"

567

TxRx- TxRx+

GND

24V

230V

50 Hz

N 11 21 31

N 1 2 T1 T2U

230V

50 Hz

10 11 2145 46 9 41 42 51 52 5322 54 55

KM4BT11 YV5 BT8 A5

GND

TxRx+

TxRx-

GND

VAC

12 13

HL1

230V

50 Hz

SELECTOR VALVE

TERMINAL BLOCK

Brown

Black

Blue

Red

Green

Yellow/Green

Ausiliary

contact

Marrone

Nero

Blu

INSTALLER TERMINAL BLOCK

(CONTACTS USED)

OUTSIDE INSIDE

OUTSIDE AIR PROBE

TERMINAL BLOCK

ELECTRIC HEATER PANEL

TERMINAL BLOCK

ELECTRIC HEATER

TERMINAL BLOCK

PUMP TERMINAL BLOCK

ROOM CONTROLLER

TERMINAL BLOCK

APPLIANCES

MEDIUM TEMPERATURE REVERSE-CYCLE UNIT, MODEL AWR MTD2 XE

OUTSIDE AIR TEMPERATURE PROBE

(SUPPLIED AS STANDARD WITH THE HEAT PUMP)

1”1/4 THREE-WAY SELECTOR VALVE FOR DHW PRODUCTION

DHW STORAGE TANK, MODEL HWC 300 OR HWC 500

ELECTRIC HEATER KIT, 1-2-3 kW

STORAGE TANK FOR HEATED AND CHILLED WATER,

MODEL BT35, BT100 OR BT200 (*)

ROOM UNIT (SUPPLIED AS STANDARD WITH THE HEAT PUMP)

58 AWR-MTD2-XE EN 11/2010

SYSTEM CONFIGURATION

U I A

System number 0

Parameter configuration

Description Menu

Parameter

no.

Default

Write

set value

UOM

System type (table 1) Mn01 0101 0 0* -

SYSTEM compensation curves in heating mode

Enable SYSTEM compensation curve

0= Disabled

1= Enabled

Mn01 0152 0 -

SYSTEM compensation curve number Mn01 0159 1 -

Enable room temperature influence on SYSTEM

0= Disabled

1= Enabled

Mn01 0163 0 -

SYSTEM Room Authority Mn01 0164 30 %

MINIMUM return set point limit for SYSTEM curve Mn01 0165 30 °C

MAXIMUM return set point limit for SYSTEM curve Mn01 0166 48 °C

SYSTEM compensation curves in cooling mode

Enable SYSTEM compensation curve

0= Disabled

1= Enabled

Mn01 0154 0 -

Maximum return temperature set point limit in cooling mode (Tm1) Mn01 0128 25 °C

Minimum outside temperature corresponding to max. return

temperature (Te1)

Mn01 0129 23 °C

Minimum return temperature set point limit in cooling mode (Tm2) Mn01 0130 23 °C

Maximum outside temperature corresponding to min. return

temperature (Te2)

Mn01 0131 36 °C

Contact HL1 configuration, secondary circuit pump

Enable contact HL1 HIGH TEMPERATURE ZONE The contact closes and the pump or motor-driven shut-off valve is activated)

Mn01 015A 0 3*

* obligatory values for the present configuration

59EN 11/2010 AWR-MTD2-XE

REGOLAZIONE IMPIANTO E CARATTERISTICHE DI FUNZIONAMENTO

U I A

MAINTENANCE AND SERVICE

Alarm signals

When an alarm is activated, the symbol comes one.

Displaying alarms

x3 sec.

• Press the and buttons for 3 seconds

• Turn the knob

• Display the alarm codes

• Press the knob to confirm

• Resolve the problem and then reset the alarms using the procedure described in “Resetting alarms”

1 2 3

Resetting alarms

Alarm log

The alarm log can only be displayed using the service keypad. Contact an authorised service centre.

The room controller can display the most recently activated alarm code from Mn11:

- parameter 1100 = no. of alarms saved in the log (visible only with service keypad)

- parameter 1101= code of last alarm activated

- parameter 1102= alarm activation hour

- parameter 1103= alarm activation minutes

- parameter 1104= alarm activation day

- parameter 1105= alarm activation month

- parameter 1106= alarm activation year

x3 sec.

• Press the and buttons for 3 seconds

• Turn the knob

• Select

• Press the knob to confirm

• Alarms reset

1 2 3

60 AWR-MTD2-XE EN 11/2010

MAINTENANCE AND SERVICE

ALARM TABLE

Alarm code Cause Solution

A001 BT1 System heat exchanger water inlet temperature probe Probe faulty or disconnected A002 BT2 System heat exchanger water outlet temperature probe Probe faulty or disconnected A003 BT8 DHW storage temperature probe Probe faulty or disconnected A004 BT7 Outside air temperature probe for unit management Probe faulty or disconnected A005 BT9 Storage tank temperature probe Probe faulty or disconnected A006 BT11 Outside air temperature probe Probe faulty or disconnected A007 BP1 High pressure transducer Transducer faulty or disconnected

A013 F1 High pressure switch

Check connection Check refrigerant circuit pressure

A014 High pressure measured by transducer BP1

A019 Difference between low and high pressure in refrigerant circuit too low

Check refrigerant circuit pressure Check refrigerant charge

A022 Operation outside of limits

Make sure outside air temperature and water temperature set point are inside the specified operating limits

A023 Source differential pressure switch/flow switch activated

Make sure the filter is clean Make sure the system is filled with water Check water flow-rate

A025 Differential pressure switch / system flow switch F3 activated

Make sure filters are clean Check water flow

Check for air in the system A030 Compressor operating hours reached Scheduled maintenance A033 System pump operating hours reached Scheduled maintenance A034 Domestic hot water pump operating hours reached Scheduled maintenance A035 Mixed zone pump operating hours reached Scheduled maintenance A036 Fan operating hours reached Scheduled maintenance A038 System heat exchanger frost prevention alarm Scheduled maintenance A041 DHW storage temperature too high A042 Inside frost prevention alarm

A045 Outside air temperature probe

Check connections

Faulty probes, replace terminal A047

Thermostatic valve driver Contact service centre

A048 A049 A050 A051 A052 A053 A054 Legionella prevention alarm

A055 Temperature probe N-THC n.1

Check connections

Probe faulty or disconnected

A056 Address setting error on remote terminal supplied with the unit

Check connections

Check address

A057 Address setting error on expansion module 2

Check connections

Check address, must be 1 A058 Temperature probe in low temperature zone LT2, expansion 2 Probe faulty or disconnected

A063 Address setting error on expansion module 3

Check connections

Check address, must be 2 A064 Temperature probe in low temperature zone LT3, expansion 3 Probe faulty or disconnected A075 Water temperature too high in mixed circuit, expansion module 1 A077 Water temperature too high in mixed circuit, expansion module 2 A094 End defrost due to maximum time

A095 Temperature probe N-THC n.2

Check connections

Probe faulty or disconnected

A096 Address setting error on zone remote terminal

Check connections

Check address

A097 Temperature probe N-THC n.3

Check connections

Probe faulty or disconnected

A098 Address setting error on zone remote terminal

Check connections

Check address

A099 Temperature probe N-THC n.4

Check connections

Probe faulty or disconnected

A100 Address setting error on zone remote terminal

Check connections

Check address

A101 Temperature probe N-THC n.5

Check connections

Probe faulty or disconnected

A102 Address setting error on zone remote terminal

Check connections

Check address

A103 Address setting error on expansion module 1

Check connections

Check address, must be 1 A104 Low temperature zone LT1 temperature probe, expansion 1 Probe faulty or disconnected

A109 Low pressure alarm from low pressure switch

Check connection

Check refrigerant circuit pressure

A114 Solar/pool module address setting error

Check connections

Check address A115 Solar/pool module general alarm A116 Master unit not connected, cascade control A117 Slave unit not connected, cascade control A120 Water temperature too high in mixed circuit, expansion module, expansion module 3

A121 Temperature probe N-THC n.6

Check connections

Probe faulty or disconnected

A122 Address setting error on zone LT3 remote terminal

Check connections

Check address

61EN 11/2010 AWR-MTD2-XE

MAINTENANCE AND SERVICE

ALARM TABLE

The heat pumps can be fitted with a single-phase or three-phase peak limiter to reduce compressor start-up current.

Peak limiter single-phase

The LED on the peak limiter identifies different operating or alarm conditions based on the sequence of flashes:

• 2 flashes every 5 sec.: line voltage present, correct operation

• LED on for 5 sec. and LED off for 5 sec.: peak limiter faulty

• quick flashes for 10 sec.: line voltage out-of-range

PEAK LIMITER ALARM SIGNALS

Alarm code Cause Solution

A124 Humidity probe N-THC n.1

Check connections Probe faulty or disconnected

A125 Humidity probe N-THC n.2

Check connections Probe faulty or disconnected

A126 Humidity probe N-THC n.3

Check connections Probe faulty or disconnected

A127 Humidity probe N-THC n.4

Check connections Probe faulty or disconnected

A128 Humidity probe N-THC n.5

Check connections Probe faulty or disconnected

A129 Humidity probe N-THC n.6

Check connections Probe faulty or disconnected

62 AWR-MTD2-XE EN 11/2010

MAINTENANCE AND SERVICE

SYSTEM emergency operation

If the heat pump is not working correctly or the compressor has shut down, emergency operation can be activated. Emergency operation involves heating the water using the electric heaters available on the system (outlet, storage tank). The compressor remains off.

To enable manual operation of system heaters, set parameter 0620 = 1 (manual)

DOMESTIC HOT WATER emergency operation

If the heat pump is not working correctly or the compressor has shut down, emergency operation can be activated. Emergency operation involves heating the domestic hot water using the electric heater inside the storage tank.

To enable manual operation of DHW storage heaters, set parameter 0202 = 1

Description

Electric heater operating mode 0 = heat pump only 1 = electric heater only 2 = heat pump + electric heater

Mn02

Parameter

no.

0202

Valore da

impostare

UOM

SCHEDULED MAINTENANCE

Never perform any cleaning operations before having

disconnected the unit from the mains power supply. Make sure power is not connected before proceeding. Control maintenance is fundamental to maintain the efficiency of the unit both in terms of operation and energy consumption. The Technical Service maintenance plan must be observed, with an annual service which includes the following operations and checks:

- Filling of the water circuit;

- Presence of air bubbles in the water circuit;

- Efficiency of safety devices;

- Power supply voltage;

- Electrical power input;

- Tightness of electrical and water connections;

- Condition of the compressor contactor;

- Efficiency of the plate heat exchanger resistor;

- Verification of operating pressure, superheating and subcooling

- Efficiency of the compressor heater

- Cleaning of the finned coil every three months

- Cleaning of the fan grills

- Cleaning of condensate drain pan.

- Cleaning of water filters.

- Checking the ventilation openings on the base are free of leaves, bushes or anything else that may obstruct air flow.

For units installed near the sea, the intervals between maintenance should be halved.

SHUTTING DOWN FOR LONG PERIODS

After deactivating the heat pump:

- Disconnect the unit from the power supply.

- Make sure the remote keypad is in the “OFF” position.

- Place QF1 in the OFF position (see wiring diagram).

- Deactivate the indoor terminal units by placing the switch of each unit in the “OFF” position.

- Close the water valves.

If the outside temperature may fall below zero; there is the risk of freezing. The water circuit MUST BE EMPTIED AND CLOSED (if draining after operation in heat pump mode, beware that

the water may be hot), or antifreeze must be added in the proportion recommended by the manufacturer. 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 featured. If the mains switch is turned to “off” for more than four hours, after turning it on and before reactivating the unit, leave the power on but the unit deactivated for at least two hours to preheat the oil in the compressor sump.

Description

Type of outlet electric heater operation 0 = Supplementary 1 = Replacement Enable manual heater operation

Mn01

Mn06

Parameter

no.

010G

0620

Default

UOM

Set the parameters following the sequence described in the table

63EN 11/2010 AWR-MTD2-XE

UNSCHEDULED MAINTENANCE

Never perform any cleaning operations before having

disconnected the unit from the mains power supply. Make sure power is not connected before proceeding.

CHEMICAL WASHING

It is recommended to chemically flush the plate heat exchanger after every 3 years of operation. To perform this operation, contact a specialist technician.

REFRIGERANT GAS CHARGE

The chillers are filled with R410A refrigerant gas and tested in the factory. In normal conditions, there should be no need for the Technical Service to intervene to check the refrigerant gas. However, over time, small leaks may develop at the joints leading to loss of refrigerant and draining of the circuit, causing the unit to function poorly. In this case, the leaks of refrigerant must be identified and repaired and the refrigerant circuit recharged. Proceed as follows:

- Empty and dry the entire refrigerant circuit using a vacuum pump connected to the low and high pressure tap until the vacuometer reads about 10 Pa. Wait a couple of minutes and check that this value does not rise to more than 50 Pa.

- Connect the refrigerant gas cylinder or a filling cylinder to the low pressure line pressure gauge connection

- Charge the quantity of refrigerant indicated on the unit’s rating plate.

- Always check the superheating and subcooling values, which should be between 5 and 10°C and 4 and 8°C.

- After a couple of hours operation, check that the liquid indicator indicates a dry circuit (dry-green).

In the event of partial leaks, the circuit must be completely emptied before being recharged. The R410A refrigerant must only be charged in the liquid state. Operating conditions other than rated conditions may produce considerably different values. Tightness testing or identification of leaks must only be carried out using R410A refrigerant gas, checking with a suitable leak detector. The refrigerant circuit must not be charged with a refrigerant other than that indicated on the rating plate and in this manual. The use of a different refrigerant may cause serious damage to the compressor.

Oxygen, acetylene or other flammable or poisonous gases must never be used in the refrigerant circuit as they may cause explosion or poisoning. Oils other than those indicated must not be used. The use of different oil may cause serious damage to the compressor.

DISPOSAL

The unit must be disposed of according to the legislation

in force in the country concerned

64 AWR-MTD2-XE EN 11/2010

LIST OF PARAMETERS

U I A

Description Menu Parameter no. UOM

Enable domestic hot water set point: 0 = Economy, 1 = Comfort Mn00 0015

Domestic hot water Economy set point Mn00 0022 °C

Domestic hot water Comfort set point Mn00 0023 °C

User password Mn00 0036

Enable remote contact: 0= remote contact enabled, 1= remote contact disabled (selection from keypad only) Mn01 0100

Automatic mode changeover set point in HEATING Mn01 0106 °C

Automatic mode changeover differential in HEATING Mn01 0107 °C

Automatic mode changeover set point in COOLING Mn01 0108 °C

Automatic mode changeover differential in COOLING Mn01 0109 °C

Type of outlet heater operation: 0 = Supplementary , 1 = Replacement Mn01 010G

Type of boiler operation: 0 = Supplementary , 1 = Replacement Mn01 010H

Maximum return set point limit in cooling mode (Tm1) Mn01 0128 °C

Outside minimum temperature corresponding to max. return temperature (Te1) Mn01 0129 °C

Enable compensation for room humidity, ZONE LT3: 0= Disabled , 1= Enabled Mn01 012N

Room relative humidity value to start increasing water outlet temperature set point, ZONE LT3 Mn01 012P %

Maximum outlet temperature hysteresis corresponding to 100% relative humidity Mn01 012R °C

Minimum return set point limit in cooling mode (Tm2) Mn01 0130 °C

Maximum outside temperature corresponding to min. return temperature (Te2) Mn01 0131 °C

Maximum outlet temperature set point limit in cooling mode (Tm1) Mn01 0132 °C

Minimum outside temperature corresponding to max. outlet temperature (Te1) Mn01 0133 °C

Minimum outlet temperature set point limit in cooling mode (Tm2) Mn01 0134 °C

Maximum outside temperature corresponding to min. outlet temperature (Te2) Mn01 0135 °C

Maximum outlet temperature set point limit in cooling mode (Tm1) Mn01 0136 °C

Minimum outside temperature corresponding to max. outlet temperature (Te1) Mn01 0137 °C

Minimum outlet temperature set point limit in cooling mode (Tm2) Mn01 0138 °C

Maximum outside temperature corresponding to min. outlet temperature (Te2) Mn01 0139 °C

Inside temperature to enable frost protection Mn01 0140 °C

Outside air temperature for frost protection Mn01 0141 °C

Enable SYSTEM compensation curve 0= Disabled 1= Enabled Mn01 0152

Fixed return water temperature set point in HEATING Mn01 0153 °C

Enable SYSTEM compensation curve: 0= Disabled, 1= Enabled Mn01 0154

Fixed return water temperature set point in COOLING Mn01 0155 °C

Enable compensation for room humidity, SYSTEM: 0= Disabled , 1= Enabled Mn01 0156

Room relative humidity value to start increasing SYSTEM return water set point Mn01 0157 %

Maximum return temperature hysteresis corresponding to 100% relative humidity Mn01 0158 °C

SYSTEM compensation curve number Mn01 0159

Enable contact as: 0= Alarm signal, 1= Dehumidifier, 3= Secondary circuit pump Mn01 015A

Enable compensation curve for zone LT3 0= Disabled 1= Enabled Mn01 015E

Enable room temperature influence on SYSTEM 0= Disabled 1= Enabled Mn01 0163

SYSTEM Room Authority Mn01 0164 %

Minimum set point limit for SYSTEM curve Mn01 0165 °C

Maximum set point limit for SYSTEM curve Mn01 0166 °C

Enable compensation curve for zone LT1 0= Disabled 1= Enabled Mn01 0167

Enable compensation curve for zone LT1: 0= Disabled, 1= Enabled Mn01 0169

Enable compensation for room humidity, ZONE LT1: 0= Disabled , 1= Enabled Mn01 0171

Room relative humidity value to start increasing water outlet temperature set point, ZONE LT1 Mn01 0172 %

Maximum outlet temperature hysteresis corresponding to 100% relative humidity Mn01 0173 °C

Zone LT1 compensation curve number Mn01 0174

Enable room temperature influence on LT1 0= Disabled 1= Enabled Mn01 0178

LT1 Room Authority Mn01 0179 %

MINIMUM outlet set point limit for compensation curve in zone LT1 Mn01 0180 °C

MAXIMUM outlet set point limit for compensation curve in zone LT1 Mn01 0181 °C

Enable compensation curve for zone LT2 0= Disabled 1= Enabled Mn01 0182

Enable compensation curve for zone LT2: 0= Disabled, 1= Enabled Mn01 0184

Enable compensation for room humidity, ZONE LT2: 0= Disabled , 1= Enabled Mn01 0186

Room relative humidity value to start increasing water outlet temperature set point, ZONE LT2 Mn01 0187 %

Maximum outlet temperature hysteresis corresponding to 100% relative humidity Mn01 0188 °C

Zone LT2 compensation curve number Mn01 0189

Enable room temperature influence on LT2 0= Disabled 1= Enabled Mn01 0193

LT2 Room Authority Mn01 0194 %

MINIMUM outlet set point limit for compensation curve in zone LT2 Mn01 0195 °C

MAXIMUM outlet set point limit for compensation curve in zone LT2 Mn01 0196 °C

Electric heater operating mode: 0 = heat pump only, 1 = electric heater only, 2 = heat pump + electric heater Mn02 0202

Domestic hot water set point with heater Mn02 0209 °C

65EN 11/2010 AWR-MTD2-XE

LIST OF PARAMETERS

U I A

Description Menu Parameter no. UOM

Domestic hot water temperature set point for Legionella prevention Mn02 0211 °C

Legionella prevention cycle day MONDAY (0=no 1=yes) Mn02 0213

Legionella prevention cycle day TUESDAY (0=no 1=yes) Mn02 0214

Legionella prevention cycle day WEDNESDAY (0=no 1=yes) Mn02 0215

Legionella prevention cycle day THURSDAY (0=no 1=yes) Mn02 0216

Legionella prevention cycle day FRIDAY (0=no 1=yes) Mn02 0218

Legionella prevention cycle day SATURDAY (0=no 1=yes) Mn02 0219

Legionella prevention cycle day SUNDAY (0=no 1=yes) Mn02 0220

Legionella prevention cycle time Mn02 0221 h

Enable Legionella prevention function 0 = Not enabled 1 = Enabled Mn02 0222

Legionella prevention function with: 0 = heat pump only 1 = electric heater only 2 = heat pump + electric heater Mn02 0223

Maximum Legionella prevention function duration Mn02 0225 min.

Enable electric heater: 0 = Heater not enabled, 1 = Heater enabled Mn03 0300

Enable boiler: 0 = Boiler not enabled, 1 = Boiler enabled Mn03 0301

Activation for low outside air temperature: 0 = Function not enabled, 1 = Function enabled Mn03 0303

Outside air temperature to enable electric heater Mn03 0304 °C

Activation for low outside air temperature: 0 = Function not enabled, 1 = Function enabled Mn03 0306

Outside air temperature to enable boiler Mn03 0307 °C

Minimum outside air temperature for heat pump operation (make sure the value shown in the table is set)

Mn03 0311 °C

Electric heater activation delay time (allows the heat pump to reach steady operation and thus avoid activating the heater when not needed)

Mn06 0616 min.

Integration time to activate outlet electric heaters Mn06 0617 °C*sec

Boiler activation delay time (allows the heat pump to reach steady operation and thus avoid activating the boiler when not needed)

Mn06 0618 min.

Integration time to activate boiler Mn06 0619 °C*sec

Enable manual heater operation Mn06 0620

Relationship between plant and ambient: 0 = Unit work on ambient request, 1 = Unit work indipendent Mn01 011D

Installer password Mn01 011G

Enable compensation curve for LT3 in HEATING 0= Disabled (fixed set point operation) 1= Enabled Mn01 011R

Enable compensation curve for zone LT3: 0= Disabled, 1= Enabled Mn01 011T

Fixed water outlet temperature set point for LT3 in HEATING Mn01 011U °C

Zone LT3 compensation curve number Mn01 012A

Enable room temperature influence on LT3 0= Disabled 1= Enabled Mn01 012D

LT3 Room Authority Mn01 012E %

MINIMUM outlet set point limit for compensation curve in zone LT3 Mn01 012F °C

MAXIMUM outlet set point limit for compensation curve in zone LT3 Mn01 012G °C

Maximum outlet temperature set point limit in cooling mode (Tm1) Mn01 012H °C

Minimum outside temperature corresponding to max. outlet temperature (Te1) Mn01 012J °C

Minimum outlet set point limit in cooling mode (Tm2) Mn01 012L °C

Minimum outside temperature corresponding to min. outlet temperature (Te2) Mn01 012M °C

Activation of system pump operation at intervals: 0= system pump always on, 1=system pump operation at intervals Mn01 0143

System pump operating time in sniffing mode Mn01 0147

System pump off time between one sniffing cycle and the next Mn01 0148

Enable contact as: 0 =Reduced electricity rate, 1=Stop operation due to excess power consumption Mn01 015D

Enable compensation curve for LT1 in HEATING 0= Disabled (fixed set point operation) 1= Enabled Mn01 0168

Fixed water outlet temperature set point for LT1 in HEATING Mn01 0170 °C

Enable compensation curve for LT2 in HEATING 0= Disabled (fixed set point operation) 1= Enabled Mn01 0183

Fixed water outlet temperature set point for LT2 in HEATING Mn01 0185 °C

Minimum heat pump operating time for system Mn02 0226

Maximum heat pump operating time to reach domestic hot water set point Mn02 0227

Three-way valve travel time for domestic hot water production Mn02 0231 sec.

BT1 Heat exchanger water inlet temperature probe Mn09 0900 °C

BT2 Heat exchanger water outlet temperature probe Mn09 0901 °C

BT8 Domestic hot water probe Mn09 0902 °C

BT7 Unit control air temperature probe Mn09 0903 °C

BT9 Storage tank probe Mn09 0904 °C

BT11 Outside air temperature probe for set point management Mn09 0905 °C

BP1 Condenser/evaporator control pressure transducer Mn09 0906 bar

66 AWR-MTD2-XE EN 11/2010

INSTALLER OPERATIONS CHECKLIST

U I A

Installer: __________________________________________ Designer: _______________________________________

Type of application:___________________________________________________________________________________

Street ___________________________________________________________________________ number _____________

City/town __________________________ Postcode/ZIP code _____________ Province/State _________________________

Unit model installed ________________________________________ Serial number _________________________________

Is there a system design? YES ❑ NO ❑ If YES, has the system been developed completely in accordance with the design? YES ❑ NO ❑

Installation date: ____________________________________

Systems included:

• Winter heating AT (radiators)

❑

• Winter heating MT (fan coil) ❑

• Winter heating BT (radiant panels) ❑

• Summer cooling ❑

• DHW production ❑

• Solar thermal installed ❑

❑❑

Heating system circuit

Mark the type of system installed and describe the components in the corresponding tables

Storage tank

Additional

expansion vessel

Volume [l]

Type/model

Secondary pump

Installed?

Type/model

❑

Domestic hot water circuit

Storage tank

with coil

Volume [l]

Type/model

Coil water volume [l]

Coil heat exchange area [m2]

Storage

cylinder

Expansion

vessel

Hot water set point: __________ °C

Cold water set point: __________ °C

Domestic hot water set point: __________ °C

HEAT

PUMP

HEAT

PUMP

HEAT

PUMP

HEAT

PUMP

HEAT

PUMP

67EN 11/2010 AWR-MTD2-XE

INSTALLER OPERATIONS CHECKLIST

U I A

CONCERNING UNIT INSTALLATION OPERATIONS AND SETUP FOR COMMISSIONING,

HAVE THE FOLLOWING CHECKS BEEN COMPLETED?

Components installed (as described in the paragraph on "Water circuit connections") YES NO

• Two pressure gauges with a suitable scale are installed on the inlet and outlet

❑❑

• Shut-off valves are installed on the heating system circuit and domestic hot water circuit inlet and outlet ❑❑

• Two thermometers are installed, on the inlet and outlet ❑❑

• All pipes are insulated with suitable vapour barrier material to prevent formation of condensate and heat loss, ❑❑ with control and shut-off devices protruding from the insulation

• Drain valves are installed at the lowest points in the system

❑❑

• Automatic or manual air vent valves are installed at the highest points in the system ❑❑

• An additional expansion vessel is installed on the system if the standard vessel is insufficient ❑❑

• Vibration damper joints are installed on the inlet and outlet water pipes ❑❑

• A low-loss header is installed if the water content is insufficient ❑❑

• Vibration damper supports are installed on the unit ❑❑

• The domestic hot water production system is installed ❑❑

• The safety valve is installed and suitably sized ❑❑

• The domestic hot water expansion vessel is installed and suitably sized ❑❑

Checks (as described in the paragraph on "Checking and starting up the unit")

• Two pressure gauges with a suitable scale are installed on the inlet and outlet

• The unit is positioned as described in the chapter on "Positioning" in this manual

• The filter is installed on the system return/inlet as close as possible to the unit and in a position that is easy to access for maintenance. REQUIRED component, this must be installed before water circulates through the heat

exchanger otherwise the warranty will be void

• The filter is installed on the domestic hot water return/inlet as close as possible to the unit and in a position that is easy to access for maintenance. REQUIRED component, this must be installed before water circulates through the heat exchanger otherwise the warranty will be void

• (Water-to-water units only) The filter is installed on the source return/inlet as close as possible to the unit and in a position that is easy to access for maintenance. REQUIRED component, this must be installed before water circulates through the heat exchanger otherwise the warranty will be void

• The flow switch is installed on the unit's outlet to the heating system circuit and is electrically connected.

REQUIRED component, this must be installed before water circulates through the heat exchanger otherwise the warranty will be void

• (Water-to-water units only) The flow switch is installed unit's outlet to the source circuit and is electrically connected. REQUIRED component, this must be installed before water circulates through the heat exchanger

otherwise the warranty will be void

CHECKED

❑

68 AWR-MTD2-XE EN 11/2010

INSTALLER OPERATIONS CHECKLIST

U I A

Checks (as described in the paragraph on "Checking and starting up the unit")

• The connection pipes are suitably supported so that these do not weigh on the appliance

• Correct sizing of the expansion vessel has been verified according to the system water content and the expected operating temperature

• The position of the outside air temperature probe complies with the information provided in the installation manual

• The position of the room controllers installed complies with the information provided in the installation manual

• The position of the DHW storage tank probe complies with the information provided in the installation manual

• (Units with heat recovery only) The non-return valve is fitted on the domestic hot water circuit

• All safety conditions have been respected

• The unit is fixed to the surface it rests on

• Water connections have been carried out as indicated in the installation manual

• All water connections are tight

• All electrical connections are tight

• Make sure the water circuit has been washed and drained

• There is no air in the system (vent if necessary)

• The valves on the water circuit are open

• Electrical connections have been carried out correctly

• Voltage is within a tolerance of 10% of the rated voltage for the unit

• Unbalance between phases is less than 2%, for three-phase units

• Maintenance clearances comply with the specifications in the Installation manual under the section on POSITIONING

• Power supply electrical complies with the data on the rating plate and specified in the Installation manual under the section on MAINS POWER SUPPLY CONNECTION

• The system water content complies with the specifications in the Installation manual under the section on WATER CONNECTIONS

• Suitable water flow-rate for operation of the entire unit is guaranteed as specified in the Installation manual under the section on WATER CONNECTIONS

• (Air-to-water units only) The system has been protected with antifreeze, respecting the quantities shown in the Installation manual under the section on WATER CONNECTIONS

• The DHW storage tank has been fitted with an electric heater for Legionella prevention

CHECKED

❑

It is hereby declared that the site and access to the site where the unit to be operated or serviced is installed has been made safely accessible in compliance with all safety standards specified by Italian law 81/08 in force. A supervisor must be present on site to inform workers of residual risks in the workplace.

WARNING:

Failure to complete commissioning due to causes not attributable to the unit will require a second visit, to be charged to the customer directly by the local service centre.

Installer's signature ___________________________________________________ Date ________________________

Sede Legale: Via L.Seitz, 47 - 31100 Treviso Sede Amm.va: Via Sarson, 57/S - 36061 Bassano del Grappa (VI) - Italia

COD. C01001823E_01

DeLonghi AWR-MTD2-XEH, AWR-MTD2-XE-0031, AWR-MTD2-XE-0041, AWR-MTD2-XE-0051, AWR-MTD2-XE-0061 Installation, Operation And Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual