Danfoss DHP-A,C,H,L Installation Guide


Add to my manuals
96 Pages

advertisement

Danfoss DHP-A,C,H,L Installation Guide | Manualzz

Installation and Service instructions

DHP-H, DHP-C, DHP-L,

DHP-A, DHP-AL

VMBMA202

2 VMBMA202

Contents

Installation instructions ................... 5

1 Important information/Safety regulations . . . . . . . . . . . . . . . . . . 5

1.1 Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Heat pump information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.1 DHP-H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.2 DHP-C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 DHP-L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4 DHP-A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.5 DHP-AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.6 Package contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2.7 Heat pump control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.8 Transporting the heat pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.9 Space requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.10 Recommended location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.11 Space requirement, outdoor unit, DHP-A, -AL. . . . . . . . . . . . . . . . . . . . . 18

2.12 Recommended location of outdoor unit, DHP-A, -AL . . . . . . . . . . . . . 18

3 Drilling holes for brine lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4 Separating the heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5 Unpacking and installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.1 Setting up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.2 Removing the front cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.3 Unpacking and installing the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . 20

6 Piping installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.1 VL system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.2 D system: DHP-L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.3 VLD system: DHP-A, -AL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.4 Safety valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.5 Connecting cold and hot water pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.6 Connecting the heating system supply and return lines . . . . . . . . . . 25

6.7 Filling the water heater and heating system . . . . . . . . . . . . . . . . . . . . . . 26

6.8 Bleeding the heating system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7 Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.1 Connect power supply, 400V 3N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.2 Connect power supply, 230V 1N SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.3 Position and connect outdoor sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.4 Changing the language in the control computer . . . . . . . . . . . . . . . . . 27

7.5 Resetting to system D or VLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.6 Changing the number of auxiliary heating power stages . . . . . . . . . 28

7.7 Connect outdoor unit, DHP-A, -AL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.8 Connect defrost sensor, DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

8 Brine installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8.1 Heat sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8.2 Information collector pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.3 Connection to outdoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.4 Connection of several brine coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.5 Connection diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

8.6 Installing brine lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.7 Filling the brine system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.8 Bleeding the brine circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.9 Vent outdoor unit, DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

9 Installing accessories/additional functions . . . . . . . . . . . . . . . . . 34

9.1 Room temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9.2 EVU function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9.3 Tariff control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9.4 Flow switch/level switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9.5 Higher hot water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

10 Start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.1 Installation checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.2 Manual test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

10.3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

10.4 Installing the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

10.5 After start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

11 Customer information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Service instructions .......................... 38

12 The heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

12.1 Function description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

12.2 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

12.3 Outdoor unit and defroster function, DHP-A, -AL . . . . . . . . . . . . . . . . . 39

12.4 Passive cooling function, DHP-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

12.5 Auxiliary heating, DHP-H, -L, -C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

12.6 Auxiliary heating DHP-A, -AL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

12.7 Water heater, DHP-H, -C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

12.8 Water heater, DHP-A, -AL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

12.9 Important parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

13 Control computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

13.1 Function description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

13.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

14 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

14.1 Main menu INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

14.2 Main menu SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

15 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

15.1 Starting heat production . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

15.2 Stopping heat production . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

15.3 Starting hot water production . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

15.4 Stopping hot water production . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

16 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

16.1 Alarm list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

16.2 Measurement points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

16.3 Check points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

16.4 Operational problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

17 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

VMBMA202 3

If these instructions are not followed during installation, operation and maintenance, Danfoss AS’s liability according to the applicable warranty is not binding.

© 2008 Copyright Danfoss AS.

Danfoss AS retains the right to make changes to components and specifications without prior notice.

4 VMBMA202

Installation instructions

1 Important information/Safety regulations

⚠ The heat pump must be installed by authorised installation engineers and the installation must follow the applicable local rules and regulations as well as these installation instructions.

⚠ This apparatus is not intended for persons (including children) with reduced physical, sensory or psychological capacity, or who do not have knowledge or experience, unless supervised or they have received instructions on how the apparatus functions from a safety qualified person.

Children are not permitted to play with the apparatus.

The heat pump must be located in a frost-free environment!

The heat pump must be placed in an area with a floor drain.

⚠ The heat pump must be located on a stable base. The base must be able to support the gross weight of the heat pump when filled. (see Technical Specification)

NOTE! To prevent leaks ensure that there are no stresses in the connecting pipes!

NOTE! It is important that the heating system is completely bled after installation.

NOTE! Bleed valves must be installed where necessary.

• Installation must be carried out in accordance with applicable local rules and regulations. The hot water tank must be equipped with an approved safety valve (supplied).

• Radiator systems with a closed expansion tank must also be equipped with an approved pressure gauge and safety valve, minimum DN 20, for a maximum 1.5 bar opening pressure, or according to country specific requirements.

• Cold and hot water pipes and overflow pipes from safety valves must be made of heat resistant and corrosion-resistant material, e.g. copper. The safety valve overflow pipes must have an open connection to the drain and visibly flow into this in a frost-free environment.

• The connecting pipe between the expansion tank and the safety valve must slope continuously upwards. A continuous upwards slope means that the pipe must not slope downwards from the horizontal at any point.

• If there is any risk of groundwater infiltration at brine pipe leadins, watertight grommets must be used, for more information see section “Drilling holes for brine pipes”.

• In addition to applicable local rules and regulations the installation should be carried out in a manner that prevents vibrations from the heat pump being transmitted into the house causing noise.

Toxicity

In normal use and normal conditions the refrigerant has low toxicity. However, although the toxicity of the refrigerant is low, it can cause injury (or be highly dangerous) in abnormal circumstances or where deliberately abused. Refrigerant vapour is heavier than air and, in enclosed spaces below the level of a door for example, and in the event of leakage, concentrations can arise with a resultant risk of suffocation due to a lack of oxygen. Spaces in which heavy vapour can collect below the level of the air must therefore be well ventilated.

Refrigerant exposed to a naked flame creates a poisonous irritating gas. This gas can be detected by its odour even at concentrations below its permitted levels. Evacuate the area until it has been sufficiently ventilated.

Anyone with symptoms of poisoning from the vapour must immediately move or be moved into the fresh air.

Work on the refrigerant circuit

When repairing the refrigerant circuit, the refrigerant must not be released from the heat pump – it must be destroyed at a special plant. Draining and refilling must only be carried out using new refrigerant (for the amount of refrigerant see manufacturer’s plate) through the service valves. All warranties from Danfoss AS are void if, when filling with refrigerant other than Danfoss recommended refrigerant, it has not been notified in writing that the new refrigerant is an approved replacement refrigerant together with other remedies.

Scrapping

When the heat pump is to be scrapped the refrigerant must be extracted for destruction. Local rules and regulations related to the disposal of refrigerant must be followed.

1.2

Electrical installation may only be carried out by an authorized electrician and must follow applicable local and national regulations.

Electrical connection

The electrical installation must be carried out using permanently routed cables. It must be possible to isolate the power supply using an all-pole circuit breaker with a minimum contact gap of 3 mm. (The maximum load for externally connected units is 2A).

Electrical current! The terminal blocks are live and can be highly dangerous due to the risk of electric shock. The power supply must be isolated before electrical installation is started. The heat pump is connected internally at the factory, for this reason electrical installation consists mainly of the connection of the power supply.

NOTE! The room temperature sensor is connected to a safety extra-low voltage.

Follow the separate installation instructions for the room temperature sensor!

1.1 Refrigerant

⚠ Work on the refrigerant circuit must only be carried out by a certified engineer!

Although the heat pump cooling system (refrigerant circuit) is filled with a chlorine-free and environmentally-approved refrigerant that will not affect the ozone layer, work on this system may only be carried out by authorized persons.

Fire risk

The refrigerant is not combustible or explosive in normal conditions.

1.3 Commissioning

⚠ The installation may only be commissioned if the heating system, water heater and brine system have been filled and bled. Otherwise the circulation pumps can be damaged.

⚠ If the installation is only to be run on auxiliary heating, first ensure that the heating system is filled and that neither the brine pump nor the compressor can be started. This is carried out by setting the operating mode to ADD.HEAT.

VMBMA202 5

2 Heat pump information

2.1 DHP-H

Dimensions and connections

The brine pipes can be connected on either the left or right-hand sides of the heat pump.

300

440

1

2

455

596

40±10

80

74

4

3

56

6

7 8

9

5

327

Figure 1: DHP-H, Dimensions and connections.

Position Name

1

2

3

4

5

6

7

8

9

Brine return line (Brine in), 28 Cu

Brine supply line (Brine out), 28 Cu

Heating system supply line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW

Heating system return line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW

Expansion pipe, 22 Cu

Lifting point

Hot water pipe, 22 Cu or stainless steel

Cold water pipe, 22 Cu or stainless steel

Lead-in for incoming power supply, sensors and communication cable

6 VMBMA202

Components

1

4

5

6

2

3

7

8

9

10

11

12

13

Left view Front view

Figure 2: DHP-H, components.

14

15

16

17

18

19

20

21

6

7

8

9

10

11

12

13

Position Name

1

2

3

4

5

Water heater, 180 litres

Return line sensor, heating system

Evaporator, insulated

Exchange valve

Supply line sensor

Heating system circulation pump

Auxiliary heating, immersion heater

Brine return line (Brine in)

Heating system supply line

Brine supply line (Brine out)

Brine pump brine system

Drying filter

Expansion valve

Hot water temperature sensor (displays maximum temperature)

Control panel for control equipment

Electrical panel

Compressor

Low pressure switch

Operation pressure switches

High pressure switch

Condenser with primary side drain

14

15

16

18

19

20

17

Right view

21

VMBMA202 7

2.2 DHP-C

Dimensions and connections

The brine pipes can be connected on either the left or right-hand sides of the heat pump.

300

440

2

1

455

596

40±10

80

4

3

56

6

7 8

74 327

9

5

Figure 3: DHP-C, Dimensions and connections.

Position Name

1

2

3

4

5

6

7

8

9

Brine return line (Brine in), 28 Cu

Brine supply line (Brine out), 28 Cu

Heating system supply line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW

Heating system return line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW

Expansion pipe, 22 Cu

Lifting point

Hot water pipe, 22 Cu or stainless steel

Cold water pipe, 22 Cu or stainless steel

Lead-in for incoming power supply, sensors and communication cable

8 VMBMA202

Components

1

7

8

9

2

3

4

5

6

10

11

12

13

14

15

16

Left view Front view

Figure 4: DHP-C, components.

14

15

16

17

18

19

20

21

6

7

8

9

10

11

12

13

22

23

24

Position Name

1

2

3

4

5

Water heater, 180 litres

Return line sensor, heating system

Evaporator, insulated

Heat exchanger for cooling operation

Exchange valve cooling

Shunt cooling

Exchange valve, heating/hot water

Supply line sensor

Heating system circulation pump

Auxiliary heating, immersion heater

Brine return line (Brine in)

Heating system supply line

Brine supply line (Brine out)

Brine pump brine system

Expansion valve

Drying filter

Hot water temperature sensor (displays maximum temperature)

Control panel for control equipment

Electrical panel

Compressor

Low pressure switch

Operation pressure switches

High pressure switch

Condenser with primary side drain

17

18

19

21

20

22

23

Right view

5

6

24

VMBMA202 9

2.3 DHP-L

Dimensions and connections

The brine pipes can be connected on either the left or right-hand sides of the heat pump.

300

440

1

2

455

596

40±10

379

4

3

139

219

299

6

5

7

690

Figure 5: DHP-L, Dimensions and connections.

Position Name

1

2

3

4

5

6

7

Brine return line (Brine in), 28 Cu

Brine supply line (Brine out), 28 Cu

Heating system supply line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW

Heating system return line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW

Alternative for brine supply

Alternative for brine return

Lead-in for incoming power supply, sensors and communication cable

10 VMBMA202

Components

1

2

3

4

Left view

Figure 6: DHP-L, components.

6

7

8

9

10

11

12

13

14

15

16

17

18

Position Name

1

2

3

4

5

Auxiliary heating, immersion heater

Return line, heating system

Exchange valve

Evaporator, insulated

Heating system circulation pump

Supply line sensor, heating system

Brine supply line (Brine out)

Brine pump brine system

Drying filter

Expansion valve

Control panel for control equipment

Brine return line (Brine in)

Electrical panel

Compressor

Low pressure switch

Operation pressure switches

High pressure switch

Condenser with primary side drain

5

6

7

8

9

10

Front view

11

12

7

13

15

14

16

17

Right view

18

VMBMA202 11

2.4 DHP-A

Dimensions and connections

The brine pipes can be connected on either the left or right-hand sides of the heat pump.

1

2

1175

Figure 8: Outdoor unit, Dimensions and connections.

Position Name

1

2

Brine in (from HP Brine out) 28 Cu

Brine out (to HP Brine in) 28 Cu

2 1

300

250

3

2

455

596

40±10

80

74

5

4

56

9

7 8

327

1

6

10

Figure 7: DHP-A, Dimensions and connections.

Position Name

1

2

3

4

5

6

7

8

9

10

Lead-in for incoming power supply, sensors and communication cable

Brine return line (Brine in), 28 Cu

Brine supply line (Brine out), 28 Cu

Heating system supply line, 22 Cu: 6-10 kW, 28 Cu: 12 kW

Heating system return line, 22 Cu: 6-10 kW, 28 Cu: 12 kW

Expansion pipe, 22 Cu

Hot water pipe, 22 Cu or stainless steel

Cold water pipe, 22 Cu or stainless steel

Lifting point

Expansion outlet brine circuit, DN25 int.

1

4

2

5

3

6

7 8

Figure 9: Outdoor unit components and connections

Position Name

1

2

3

4

5

6

7

8

Outdoor unit

Cover

Front cover

Stand

Cover

Connection, brine in

Connection, brine out

Connection, drain drip tray

Check that the delivery of the outdoor unit contains the following:

• Outdoor unit

• Disassembled stand

• Necessary screws, nuts and washers.

• Defroster sensor

12 VMBMA202

Components

1

5

6

7

8

2

3

4

9

10

11

12

13

Left view Front view

Figure 10: DHP-A, components.

14

15

16

17

18

19

20

21

22

23

6

7

8

9

10

11

12

13

Position Name

1

2

3

4

5

Water heater, 180 litres

Defrosting tank

Evaporator, insulated

Exchange valve, defrosting

Exchange valve, heating system

Supply line sensor

Heating system circulation pump

Auxiliary heating, immersion heater

Brine pump brine system

Brine return line (Brine in)

Drying filter

Expansion valve

Brine supply line (Brine out)

Hot water temperature sensor (displays maximum temperature)

Control panel for control equipment

Electrical panel

Heating system supply line

Compressor

Low pressure switch

Operation pressure switches

High pressure switch

Condenser with primary side drain

Return line sensor, heating system

14

15

16

17

19

18

20

21

Right view

22

23

VMBMA202 13

2.5 DHP-AL

Dimensions and connections

The brine pipes can be connected on either the left or right-hand sides of the heat pump.

Heat pump

15

6

5

4

3

2 1

40±10

455

690

Figure 11: DHP-AL, dimensions and connections.

Position Name

Heat pump

1

2

3

4

5

6

Water heater

7

8

9

10

11

12

13

14

15

16

17

Brine out, during defrosting, 28 Cu

Return line water heater, 28 Cu

Brine in

Heating system supply line, 22 Cu: 6-10 kW, 28 Cu: 12 kW

Heating system return line, 22 Cu: 6-10 kW, 28 Cu: 12 kW

Brine out, normal operation

Brine in, during defrosting

Water heater, return line

Bleed valve, at stainless steel water heater

Brine out, during defrosting

Domestic hot water, 22 Cu

Cold water

Water heater supply line to TWS coil

Brine, expansion line when outdoor unit is positioned at high level

Lead-in power and sensor lead

Lead-in sensor lead

Lifting point

Water heater

14

10

17

13

16

12

11

9

8 7

40±10

455

690

1

2

1175

Figure 12: Outdoor unit, Dimensions and connections.

Position Name

1

2

Brine in (HP Brine out) 28 Cu

Brine out (HP Brine in) 28 Cu

2 6

3

1

5

4

7 8

2 1

Figure 13: Outdoor unit components and connections.

Position Name

1

2

3

4

5

6

7

8

Outdoor unit

Cover

Front cover

Stand

Cover

Connection, brine in

Connection, brine out

Connection, drain drip tray

Check that the delivery of the outdoor unit contains the following:

• Outdoor unit

• Disassembled stand

• Necessary screws, nuts and washers.

• Defroster sensor

14 VMBMA202

Components

Left view

Figure 14: DHP-AL, components.

6

7

8

9

10

11

12

13

14

15

16

17

18

Position Name

1

2

3

4

5

Heating system supply line

Brine, supply during normal operation

Return line, heating system

Auxiliary heating, immersion heater

Electrical panel

Heating system circulation pump

Evaporator

Circulation pump coolant system

Exchange valve, heating system

Drying filter

Expansion valve

Shunt valve defrosting

Brine, supply during defrosting

Condenser

Compressor

Low pressure switch

Operation pressure switches

High pressure switch

1

2

3

7

8

9

12

10

11

4

5

6

Front view

13

14

1

2

3

4

16

15

17

18

Right view

4 5 6 7 8 9

1

2

3

10

11

Figure 15: Water heater components and connections.

Position Name

1

2

3

4

5

6

7

8

9

10

11

Defrosting tank

Water heater

TWS coil

Connection, brine, supply during defrosting

Bleed valve, at stainless steel water heater

Tap hot water

Cold water

Connection, to TWS coil

Connection, expansion line when outdoor unit is positioned at high level

Connection, brine from heat pump

Connection, return line to heat pump

VMBMA202 15

2.6 Package contents

Delivery check

1. Check that there is no transport damage. The heat pump is packaged in cardboard.

2. Remove the plastic wrapping and check that the delivery contains the following components.

Sizes 4kW - 10kW:

Part no.

086U2369

Quantity

1

Name

Safety valve 9 bar 1/2”

Sizes 12kW - 16kW:

Part no.

086U2369

Quantity Name

1 Safety valve 9 bar 1/2”

086U2701 1

086U0896 1

Outdoor sensor

Kimsafe 200 035

Safety valve

1.5 bar 1/2”

086U2701 1 Outdoor sensor

Kimsafe 200 035 086U2824 1 Expansion and bleed tank without valve

086U0896 1 Safety valve

1.5 bar 1/2”

086U0026 5 Rubber collar hole 22-32mm

086U2824

086U0026

1

5

Expansion and bleed tank without valve 086U6034

086U6007

Rubber collar hole 22-32mm

2

1

Flex. hose DN25 L=550

Filling device brine DN32

086U6033

086U6006

2

1

Flex. hose DN20 L=550

Filling device brine DN25

086U6005 1 Dirt filter with shut-off DN25

086U6005 1 Dirt filter with shut-off DN25

16 VMBMA202

2.7 Heat pump control panel

The heat pump control panel consists of a display, four control buttons and an indicator.

ROOM 20°C

(20°C)

NO DEMAND HEAT

OPERAT. AUTO

The symbols in the display are only examples. Certain symbols cannot be displayed at the same time.

2.9 Space requirement

To facilitate the installation and subsequent testing and maintenance it is recommended that there is sufficient free space around the heat pump in accordance with the following dimensions:

– 300 mm on each side

– 300 mm above

– 600 mm in front

– 10 mm behind

Figure 16: Display, control buttons and indicator for the heat pump.

The control computer is controlled using a user-friendly menu system, displayed in the display.

Use the four control buttons to navigate the menus and increase or reduce the set values:

• An up button with a plus sign

• A down button with a minus sign

• A right button with a right arrow

• A left button with a left arrow

The main menu, INFORMATION, is opened by pressing the left or right buttons. From INFORMATION one of the four sub-menus can be opened: OPERAT.; HEATCURVE; TEMPERATURE and OPERAT. TIME.

For installation or service, a hidden service menu, SERVICE, is used.

This is opened by holding the left button depressed for five seconds. From the SERVICE menu one of the following sub-menus can be opened: WARMWATER; HEATPUMP; ADD.HEAT; MANUAL TEST and INSTALLATION.

For further information about the menus see the service instructions.

The indicator at the bottom of the control panel has two modes:

• Lit steadily, the installation has power and is ready to produce heat or hot water

• Flashing, means an active alarm

Figure 17: Necessary service space.

DHP-H

DHP-C

DHP-A

DHP-L

DHP-AL

Figure 18: Minimum headroom for heat pump installation.

2.8 Transporting the heat pump.

The heat pump must always be transported and stored upright.

Secure the heat pump so that it cannot tip over during transportation.

When transporting indoors to the installation location it may be necessary to place the heat pump on its back. The time that the heat pump is transported on its back should be as short as possible.

After the heat pump has been lifted up again it must stand upright for at least an hour before commissioning.

2.10 Recommended location

⚠ To avoid condensation problems for the brine pipes, as short a brine pipe as possible is recommended.

The heat pump should be located on a stable floor, preferably made of concrete. When locating the heat pump on a wooden floor this should be reinforced to take the weight. One solution is to place a thick metal plate, at least 6mm, under the heat pump. The metal plate should cover several joists spreading the weight of the heat pump over a larger area. If the heat pump is being installed in a newly-built house, this has normally been taken into account during construction, and the joists where the heat pump will be located have been reinforced. Always check that this has been carried out when installing into a newly-built house. Avoid positioning the heat pump in a corner as the surrounding walls may amplify its noise. It is also important to adjust the heat pump using the adjustable feet so that it is horizontal to the base.

VMBMA202 17

2.11 Space requirement, outdoor unit,

DHP-A, -AL

• To ensure the function of the outdoor unit, there must be at least

300 mm of space behind and 1500 mm at the front.

• For maintenance work there must be approximately 300 mm of space at the sides of the outdoor unit.

3 Drilling holes for brine pipes

⚠ NOTE! Ensure that the holes for the insert pipes are positioned so that there is room for the other installations.

NOTE! The brine pipes shall have separate lead-ins.

⚠ If the wall lead-ins are below the highest ground water level watertight lead-ins must be used.

The brine pipes must be insulated from the heat pump, through the walls and outside the house all the way to the collector so as to avoid condensation and prevent heat loss.

If the brine pipes are to be routed above ground, drill holes in the walls for them.

If the brine pipes are to be routed below ground see the instructions below.

Figure 19: Necessary service space for outdoor unit.

2.12 Recommended location of outdoor unit,

DHP-A, -AL

When positioning the outdoor unit, note the following:

⚠ The outdoor unit does not have to be positioned in any specific direction.

⚠ Noise is produced from the outdoor unit when the fan is in operation, remember this when positioning to reduce disturbance in your own home as well as to any neighbours.

⚠ When the outdoor unit is defrosting, water will drip straight down under the unit. The area around the outdoor unit must therefore be properly drained in order to catch the water

(approximately 2 litres per defrost).

⚠ Remember that the outdoor unit must have a certain amount of room in order to function and for servicing, see “Heat pump information” chapter.

⚠ Remember that the water that drips from the outdoor unit during defrost must be able to drain into the ground. The outdoor unit must therefore not be positioned on asphalt or slabs where water cannot drain easily.

⚠ The outdoor unit’s adjustable stand must be positioned on a secure base such as wooden sleepers, paving slabs or cast footings.

Figure 20: Drilling holes for brine pipes.

Position Name

1

2

3

4

Insert pipe

Brine pipe

Mortar

Sealant

1. Drill holes in the wall for the insert pipes (1) for the brine pipes.

Follow the dimension and connection diagrams in the section

“Heat pump information”. If there is any risk of groundwater infiltration at brine pipe lead-ins, watertight grommets must be used.

2. Position the insert pipes (1) in the holes sloping downwards.

The inclination must be at least 1cm every 30cm. Cut them at an angle (as illustrated) so that rain water cannot get into the pipes.

3. Insert the brine pipes (2) into the insert pipes in the installation room.

4. Fill in the holes in the wall with mortar (3).

5. Ensure that the brine pipes (2) are centred in the insert pipes (1) so that the insulation is distributed equally on all sides.

6. Seal the insert pipes (1) with a suitable sealant (foam) (4).

18 VMBMA202

4 Separating the heat pump

Does not apply to DHP-A, -AL.

If there is a shortage of space when transporting the heat pump to installation location it may be necessary to separate the heat pump unit and the water heater.

The following instruction describes how the heat pump is separated to transport the separate parts more easily.

⚠ NOTE! Do not lift heavy equipment alone, always use two people for heavy lifting.

1. Remove the packaging.

2. Press against the front cover; and turn the catch 90° degrees anti-clockwise to release the front cover.

3. Tilt the front cover outwards.

4. Lift the front cover upwards to remove it from the heat pump.

1

2

9. Unscrew the electrical panel’s screws.

10. Turn the electrical panel through 180° and place it in front of the heat pump unit.

Figure 23: Electrical panel.

11. Disconnect the T-pipe connector from the return line under the heater, see figure below.

12. Disconnect the flexible hose at the electrical auxiliary heater, see figure below.

3

Figure 21: The front cover.

5. Carefully pull the switch free from the control panel.

6. Unscrew the front cross stay, the top cover, side covers and rear cover.

Figure 24: Connections.

13. Unscrew the four screws in the corners that hold the water heater’s bottom plate.

NOTE! Always use two people for heavy lifting.

14. Lift off the unit with the water heater, pipe and electrical auxiliary heater.

Figure 22: Covers.

7. Disconnect the electrical connectors at the exchange valve, circulation pump and electrical auxiliary heater.

8. Disconnect the cables for the following sensors at the electrical panel:

- Supply line (301, 302)

- Hot water (311, 312)

-Top sensor (325, 326)

Figure 25: Separating.

15. Put the unit down carefully.

VMBMA202 19

5 Unpacking and installation

5.1 Setting up

• The heat pump has feet that can be adjusted 20 mm to compensate for irregularities in the surface on which it is sitting. If the surface is so irregular that the feet cannot compensate for it, the installation engineer must remedy this.

• It is recommended that a condensation drain be installed from the drain pipe of the drip tray while the heat pump is on its side.

The drain pipe opens through a hole in the base plate and has a

Ø 10 mm hose connection.

1. Move the heat pump to the installation site. If there is little space the heat pump can be separated according to the section

“Separating the heat pump”.

2. Remove the packaging.

1. Press against the front cover; and turn the catch 90° degrees anti-clockwise to release the front cover.

2. Tilt the front cover outwards.

3. Lift the front cover upwards to remove it from the heat pump.

5.3 Unpacking and installing the outdoor unit

Applies to DHP-A, -AL.

The outdoor unit is packed and delivered in a crate.

1. Start by unpacking the unit from the crate.

2. Check that the delivery is complete, it must contain the outdoor unit, front cover, cover as well as a disassembled stand including necessary screws, nuts and washers.

Figure 26: Condensation drain connection

3. Install a condensation drain on the connection in the base plate if required.

4. Set up the heat pump in the installation site.

Assembling the stand

1. Screw the two horizontal struts together (1) using the two ends

(2) as illustrated below. Use 8 x M6x10 screws. The curved edges of the horizontal struts must be facing upwards and inwards.

Bent edge

2

1 Slit

2

1

Slit 3

3

Figure 27: Adjusting the feet.

5. Adjust the feet so that it is horizontal.

5.2 Removing the front cover

⚠ NOTE! Do not damage the electrical wiring for the control computer when the front cover is removed!

To install the heat pump the front cover must be removed.

1

Figure 29: Assembling the stand.

2. Screw the adjustable feet (3) into the holes under the ends.

Preparing the outdoor unit

While the outdoor section remains on the pallet it should be prepared for placing on the stand. Carry out the following:

3. There are three M6x20 screws on the lower edge of the outdoor unit. Unscrew them so that 2-3 mm of the thread remains. Use a torx TX25 screwdriver, or equivalent.

4. Raise the outdoor unit. NOTE! Do not lift the side plates.

5. Remove the side plates. They are held in place by clamps and so are removed by pulling outwards.

6. Remove all four screwed lifting eyes. Use a 13 mm wrench, or equivalent.

Assembling the outdoor unit on the stand

2

3

20

Figure 28: Removing the front cover.

7. Lift the outdoor unit into the place on the stand.

Figure 30: Lift the outdoor unit onto the stand.

VMBMA202

8. Screw the outdoor unit onto the stand. Use 4 x M6x20 screws. It may be necessary to push and pull the stand slightly in order to get the screw holes to align.

⚠ NOTE! When filling the brine system the outdoor unit must be bled using the bleed screws on the connecting pipes inside the side covers. We recommend that you return to this instruction after the brine system has been filled.

9. Reinstall the side panels.

Assembling the front cover

10. Hook the lower edge of the front cover onto at least one of the three screws in the bottom edge of the stand.

11. Secure the upper edge of the front panel temporarily in the centre hole. Use 1 x M6x15 torx TX25.

12. Align all the three screws in the lower edge.

13. Screw the three screws in the lower edge fully. Use a torx TX25 screwdriver, or equivalent.

14. Secure the upper edge of the front cover.

Use only the three screws screwed into the outdoor unit, see figure below. Use only 3 x M6x15 torx TX25.

Figure 33: Screw the front cover into place.

17. Hook the cover onto the stand.

Figure 31: Secure the cover.

Assembling the cover and cover plate

15. Hook the cover at the front edge on the front cover.

Figure 34: Hook the cover into place.

Assembling the defrost sensor

Figure 32: Hook the front cover into place.

16. Secure the cover using a screw on each side. Use 2 x cross head screws.

If the cover does not align with the side cover plates it may be necessary to drill new Ø 3 mm holes:

• Mark for the new holes

• Lift off the cover

• Drill the holes

• Install and screw the cover into place

Figure 35: Hook the defroster sensor into place.

18. Slide the mounting for the defroster sensor into the hole on the reverse of the outdoor unit until it hooks into place on the edge.

19. Secure the defroster sensor at the bottom of the mounting using a cable tie.

The outdoor unit is now mounted and can be adjusted on the site where it should be set up.

VMBMA202 21

6 Piping installation

⚠ NOTE! To prevent leaks ensure that there are no stresses in the connecting pipes!

⚠ NOTE! It is important that the heating system is completely bled after installation.

NOTE! Bleed valves must be installed where necessary.

• Ensure that the piping installation follows the dimension and connection diagrams in section “Heat pump information”.

• Piping installation must be carried out in accordance with applicable local rules and regulations. The hot water tank must be equipped with an approved safety valve (supplied).

Selecting the heating system

The heat pump is set to VL system on delivery, that is with an integrated electrical auxiliary heater and an exchange valve after the auxiliary heater.

What determines which of the three systems VL, D or VLD should be used is, among other things, how any auxiliary heater is used for hot water production, and which model of heat pump is used.

6.1 VL system

In a VL system the heat pump can produce both heating and hot water with the compressor and the integrated auxiliary heater.

Production of heating and hot water cannot occur at the same time because the exchange valve for heating/hot water is positioned after the auxiliary heater.

The integrated auxiliary heater carries out peak heating charging

(legionella function) in those operating modes that permit auxiliary heat.

DHP-H, -C, -A, connection diagram VL system

Figure 36: General connection diagram DHP-H, -C, -A.

10

11

12

13

6

7

8

9

14

15

Position Name

1

2

3

4

5

Supply line

Return line

Safety valve cold water (9 bar)

Safety valve expansion heating system (not included)

Expansion heating system (not included)

Strainer

Flexible hoses

Vacuum valve

Non-return valve

Shut-off valve

Non-return valve

Shut-off valve

Hot water

Cold water

Heat pump

22 VMBMA202

DHP-L, connection diagram VL system

Figure 37: General connection diagram DHP-L.

10

11

12

13

14

6

7

8

9

Position Name

1

2

3

4

5

Supply line

Return line

Safety valve cold water (9 bar)

Safety valve expansion heating system (not included)

Expansion heating system (not included)

Strainer

Flexible hoses

Vacuum valve

Non-return valve

Shut-off valve

Cold water

Hot water

Heat pump

Water heater

DHP-AL, connection diagram VL system

6

4

5

11

2

3

8

12 13 14

10

7

18

9

15

16

1 17

7

Figure 38: General connection diagram DHP-AL.

10

11

12

13

6

7

8

9

14

15

16

17

18

Position Name

1

2

3

4

5

Heat pump

Supply line

Return line

Safety valve (not included)

Expansion tank (not included)

Strainer

Flexible hoses

Bleed valve

Mixer valve

Exchange valve

Safety valve (9 bar)

Vacuum valve

Non-return valve

Shut-off valve

Cold water

Hot water

Water heater

Bleed valve at stainless steel water heater

VMBMA202 23

6.2 D system: DHP-L

With a DHP-L in a D system, the heat pump can produce both heating and hot water with the compressor and an external auxiliary heater (oil boiler, electric boiler, district heating or similar) that is located after the exchange valve replaces the integrated auxiliary heater to produce heat.

The cables for the integrated auxiliary heater must be disconnected, which means that the heat pump cannot carry out peak heat charging (legionella function). Peak heat charging must take place with an electric heating element that is integrated in the water heater or with an electric heating element on the supply line to the water heater.

The heat pump control computer also controls an additional shunt.

DHP-L, connection diagram D system

6.3 VLD system: DHP-A, -AL

A VLD system is largely similar to a VL system, but with an external auxiliary heater (often a boiler that is fired with solid fuel) in combination with a DHP-A or DHP-AL.

DHP-A’s integrated exchange valve is replaced by an exchange valve that is located after the external auxiliary heater so that both the heat pump and the auxiliary heater can produce heat and hot water. The integrated exchange valve is disengaged with the flow direction locked towards the heating system.

Production of heating and hot water cannot occur at the same time because the exchange valve for heating/hot water is positioned after the auxiliary heater. The integrated auxiliary heater carries out peak heating charging (legionella function) in those operating modes that permit auxiliary heat.

The heat pump’s control computer controls the external additional heater via an output (283) on the defrosting card (factory installed in DHP-A or DHP-AL). The heat pump control computer also controls an additional shunt.

DHP-A, connection diagram VLD system

Figure 39: General connection diagram DHP-L, D system.

14

15

16

17

18

19

10

11

12

13

6

7

8

9

Position Name

1

2

3

4

5

Supply line

Return line

Safety valve cold water (9 bar)

Safety valve expansion heating system (not included)

Expansion heating system (not included)

Strainer

Flexible hoses

Vacuum valve

Non-return valve

Shut-off valve

Cold water

Hot water

Heat pump

Water heater

External auxiliary heater

Circulation pump

Non-return valve

Moved supply line sensor

Additional shunt

24

Figure 40: General connection diagram DHP-A, VLD system.

18

19

20

21

14

15

16

17

10

11

12

13

6

7

8

9

Position Name

1

2

3

4

5

Supply line

Return line

Safety valve cold water (9 bar)

Safety valve expansion heating system (not included)

Expansion heating system (not included)

Strainer

Flexible hoses

Vacuum valve

Non-return valve

Shut-off valve

Non-return valve

Shut-off valve

Hot water

Cold water

Heat pump

External auxiliary heater

Circulation pump

Non-return valve

Moved supply line sensor

Additional shunt

External exchange valve

VMBMA202

DHP-AL, connection diagram VLD

23

20 22

10

19

21

7

6

2

3

4

5

18

11

12

13 14

9

15

16

6.6 Connecting the heating system supply and return lines

All pipes should be routed in such a way that vibrations cannot be transmitted from the heat pump through the piping and out into the building. This also applies to the expansion pipe. To avoid the transmission of vibrations, we recommend that flexible hoses are used for the supply line and return line on both the heating system and brine system sides. Flexible hoses are available to purchase from Danfoss AS. Figures 12-15 show how appropriate and inappropriate installations look using this type of hose.

To avoid noise caused by pipe mounting, rubber-coated clamps should be used to prevent the transmission of vibrations. However, installation should not be too rigid and the clamps must not be too tight.

1 17

7

Figure 42: Do not twist the flexible hoses as they are installed.

At threaded connections, use a counterhold spanner.

Figure 41: General connection diagram DHP-AL, system VLD.

18

19

20

21

14

15

16

17

22

23

10

11

12

13

6

7

8

9

Position Name

1

2

3

4

5

Heat pump

Supply line

Return line

Safety valve (not included)

Expansion tank (not included)

Strainer

-

Flexible hoses

Mixer valve

Exchange valve

Safety valve (9 bar)

Vacuum valve

Non-return valve

Shut-off valve

Cold water

Hot water

Water heater

Bleed valve at stainless steel water heater

External auxiliary heater

Circulation pump

Non-return valve

Moved supply line sensor

Additional shunt

6.4 Safety valves

⚠ Radiator systems with a closed expansion tank must also be equipped with an approved pressure gauge and safety valve, minimum DN 20, for a maximum 1.5 bar opening pressure, or according to country specific requirements.

⚠ Cold and hot water pipes as well as overflow pipes from safety valves must be made of heat resistant and corrosionresistant material, e.g. copper. The safety valve overflow pipes must have an open connection to the drain and visibly flow into this in a frost-free environment.

⚠ The connecting pipe between the expansion tank and the safety valve must slope continuously upwards. A continuous upwards slope means that the pipe must not slope downwards from the horizontal at any point.

6.5 Connecting cold and hot water pipes

1. Connect the cold water and hot water pipes with all the necessary components according to the connection diagram for the relevant system.

Figure 43: Cut the hose to the correct length to avoid excess bowing-out or stretching at bends.

Figure 44: Cut the hose to the correct length to avoid excess bowing-out or stretching and offset the ends so that the hose is not installed completely straight.

Figure 45: Use fixed pipe bends to avoid excess stress on bends next to connections.

1. Connect the supply line with a flexible hose connection and with all the necessary components.

2. Connect the return line with a flexible hose connection and with all the necessary components including a filter.

VMBMA202 25

3. Insulate the supply and return lines.

4. Connect the expansion tank to the expansion outlet (22mm Cu) on the top of the heat pump.

6.7 Filling the water heater and heating system

1. Fill the water heater with cold water by opening the filler valve

(10) which is located on the valve pipe.

2. Bleed by opening one of the hot water taps.

3. Then fill the water heater coil and the heating system with water through the filling valve (12) to a pressure of approx. 1 bar.

6.8 Bleeding the heating system

1. Open all radiator valves fully.

2. Bleed all radiators.

3. Refill the heating system to a pressure of approximately 1 bar.

4. Repeat the procedure until all air has been removed.

5. Leave the radiator valves fully open.

7 Electrical Installation

⚠ Electrical current! The terminal blocks are live and can be highly dangerous due to the risk of electric shock. The power supply must be isolated before electrical installation is started. The heat pump is connected internally at the factory, for this reason electrical installation consists mainly of the connection of the power supply.

• Electrical installation may only be carried out by an authorized electrician and must follow applicable local and national regulations.

• The electrical installation must be carried out using permanently routed cables. It must be possible to isolate the power supply using an all-pole circuit breaker with a minimum contact gap of 3 mm. (The maximum load for externally connected units is 2A).

• Electrical connection can also cause noise so this installation must be carried out appropriately. The figure below shows an appropriate installation. There is approximately 300mm free cable between the heat pump and building, however, this requires the cable to be securely installed onto the top panel so that the cable cannot be fed into the heat pump. It is inappropriate to bolt trunking between the heat pump and the wall. This is because vibrations can then be transmitted from the heat pump through the trunking to the walls of the house.

• When the cable is connected to the terminal block a screwdriver is used to open the terminal block, see figure below.

2 3

5 OK!

1

4

5

6

7

Figure 46: Connecting cable to terminal block.

1 2 3 4

8

9

26

10 11 12

Figure 47: The location of the components on the electrical panel.

6

7

8

9

10

11

12

Position Name

1

2

3

4

5

Terminal block (applies to the expansion card)

Terminal block (applies to DHP-A, -AL)

Defrost card (applies to DHP-A, -AL)

Terminal block

Space for Danfoss Online

Warning decal

Space for expansion card

Contactor for compressor

Automatic fuses

Resetting overheating protection

Control computer

Soft starter card (Only available for 400 V)

VMBMA202

RUM 20C

INGET BEHOV VÄRME

DRIFT AUTO

RUM 20C

INGET BEHOV VÄRME

DRIFT AUTO

7.1 Connect power supply, 400V 3N

Figure 48: Recommended distance between trunking on the wall and trunking on the heat pump is 300mm.

NOTE! The power cable may only be connected to the terminal block intended for this purpose. No other terminal blocks may be used!

Figure 49: Incoming cable to heat pump with circuit breaker.

NOTE! Supplied with the jumpers shown in the figure.

1. Route the power cable through the opening in the top panel of the heat pump to the terminal blocks.

2. Connect the power cable to the terminal block.

7.2 Connect power supply, 230V 1N SP

⚠ NOTE! The power cable may only be connected to the terminal block intended for this purpose. No other terminal blocks may be used!

Incoming 230V heat pump

Incoming 230V external auxiliary heater

1L1

N2

PE1

2L1,2L1

2L1,2L2

N3

PE4

Recommended location

Unsuitable location

Figure 51: Positioning the outdoor sensor.

• Position the outdoor sensor on the north or north west side of the house.

• To measure the outdoor temperature as accurately as possible, the sensor must be positioned 2/3 of the way up the facade on houses up to three storeys high. For higher buildings, the sensor should be positioned between the second and third storeys. Its location must not be completely protected from the wind but not in a direct draft. The outdoor sensor should not be placed on reflective panel walls.

• The sensor must be positioned at least 1 m from openings in the walls that emit hot air.

• If the sensor cable is connected through a pipe, the pipe must be sealed so that the sensor is not affected by outgoing air.

The outdoor sensor is connected by a two core cable. For a cross section of 0.75 mm 2 a maximum cable length of 50 m applies. For greater lengths a cross section of 1.5 mm 2 is used, up to a maximum of 120 m.

Then connect the sensor to the heat pump control system in accordance with the instructions below.

Figure 52: Connecting the outdoor sensor.

1. Route the outdoor sensor connection cable through the cable bushing in the top panel to the terminal block.

2. Connect the sensor to the terminal blocks according to the connection diagram.

7.4 Changing the language in the control computer

If necessary, change the language in the control computer menus.

1. Ensure that the main circuit breaker is on.

2. Open the SERVICE menu by pressing for five seconds.

3. Change language in the control computer menu SERVICE ->

INSTALLATION -> ENGLISH, select language and .

Figure 50: Incoming cable to heat pump.

1. Route the power cable through the opening in the top panel of the heat pump to the terminal blocks.

2. Connect the power cable to the terminal block.

7.3 Position and connect outdoor sensors

⚠ NOTE! The outdoor sensor is connected with extra low protection voltage. Follow the specific installation instructions for the outdoor sensor!

VMBMA202 27

7.5 Resetting to system D or VLD

For a description of the different system solutions, see section

Piping installation.

The heat pump has VL as factory setting.

For D system, DHP-L:

If D system is selected the cables for the internal auxiliary heater must be disconnected according to the figure below.

7.6 Changing the number of auxiliary heating power stages

⚠ NOTE! Setting the maximum permitted number of power stages for the auxiliary heating must be carried out.

1. Ensure that the main circuit breaker is on.

2. Open the SERVICE menu by pressing for five seconds.

3. Change the number of auxiliary heating power stages in the control computer menu SERVICE -> ADD.HEAT -> MAXSTEP, select the number of stages and .

7.7 Connect outdoor unit, DHP-A, -AL

⚠ NOTE! The power cable may only be connected to the terminal block intended for this purpose. No other terminal blocks may be used!

For correct connection between the heat pump and the outdoor unit, 6 connections must be made, see also separate sheet with electrical connections.

Figure 53: The cables are disconnected from the auxiliary heater.

Connect the external auxiliary heater according to the connection diagram below.

Ground

0V

Phase high speed

Phase low speed

Motor protection fan

Peak heating

Oil/electrical additional heat

Figure 55: Connecting the outdoor unit.

1. Route the power cable through the opening in the top panel of the heat pump to the terminal blocks.

2. Connect the power cable to the terminal block.

7.8 Connect defrost sensor, DHP-A, -AL

Figure 54: Connecting external auxiliary heater.

For VLD system, DHP-A, -AL:

If the VLD system is selected DHP-A’s integrated exchange valve must be limited in open mode to the heating system.

To limit the direction of flow for the exchange valve for the heating system:

1. Ensure that the main circuit breaker is on.

2. Open the SERVICE menu by pressing for five seconds.

3. Open the control computer menu SERVICE -> MANUAL TEST.

4. Set the value for MANUAL TEST to 1.

5. Set the value for VXV HOT WATER to 0.

6. Wait for 15 seconds, disconnect the quick connector at the exchange valve.

7. Set the value for MANUAL TEST back to 0.

8. Connect the external exchange valve cables to the corresponding cables in the disconnected quick connector.

In the control computer:

To change to system D or VLD:

1. Ensure that the main circuit breaker is on.

2. Open the SERVICE menu by pressing for five seconds.

3. Change system in the control computer menu SERVICE ->

INSTALLATION -> SYSTEM -> HEATING SYSTEM, select system with and .

Figure 56: Connecting the defroster sensor.

The defroster sensor is installed on the reverse of the outdoor unit.

1. Route the defroster sensor connection cable through the cable bushing in the top panel to the terminal block.

2. Connect the sensor to the terminal blocks according to the connection diagram.

28 VMBMA202

8 Brine installation

8.1 Heat sources

Rock heat

To use rock as the heat source one or more boreholes is/are drilled and the brine hose is lowered into it/them. The hole is filled with water and a fitting with a weight is fastened to the hose before it is lowered.

Ground water heating

Ground water can be used as a heat source on the condition that there is a sufficiently large flow of ground water in the borehole. A submersible pump is lowered in one hole and pumps up groundwater, which flows through a separate heat exchanger, and is then returned through another borehole. The heat pump has a short brine circuit that works directly against the separate groundwater exchanger.

Figure 57: Borehole in rock as heat source.

Lake heat

When lake water is used as the heat source one or more brine coils is/are submerged in the water . The coils must be anchored to the bottom with weights or a net to prevent them floating.

Figure 59: Ground water as heat source.

When ground water is used as a heat source the heat pump installation must be equipped with a flow guard (available as an accessory from the Danfoss range) that stops the heat pump if the flow is too low, which can create a risk of freezing in the ground water exchanger.

Ground heat

The stored heat energy in the ground can be used as a heat source.

In this case a brine loop (or loops) is/are laid under the surface layer of ground

Figure 58: Lake water as heat source.

Figure 60: Ground as heat source.

Air heat

The DHP-A and DHP-AL heat pumps are equipped with an outdoor unit that uses air as a heat source. DHP-A, -AL can make use of the energy in the air outdoors down to temperatures of -20°C.

To obtain the correct airflow through the outdoor section it is equipped with a fan.

VMBMA202 29

8.4 Connection of several brine coils

When several brine coils are used for a heat pump installation, independent of what heat source is used, the length of the coils must not exceed the values in the following table. The coil lengths are based on ethanol 30% at 0°C.

Figure 61: Connecting outdoor unit to use air as heat source.

8.2 Information collector pipe

⚠ Local rules and regulations related to type of collector must be followed.

Borehole collector: Fully welded plastic pipe collector (PEM PN 6.3) according to the applicable local and national regulations with factory manufactured return bend.

Ground collector: Fully welded plastic pipe collector (PEM PN 10) according to the applicable local and national regulations.

In countries where frost damage occurs, the collector pipe beside an outer wall (minimum 2 meters) must be insulated in such a way that frost damage is prevented. This applies regardless of ground, rock or lake heat.

Minimum shaft depth between the energy well and the building is

0.5 m. If burial to that depth is not possible the pipes must be protected against any external mechanical damage.

>0,5m

>2,0m

DHP-H,

-C, -L

Size

6

8

10

12

16

Pytg kPa

31

33

67

64

56

Calculated maximum coil length per coil, in metres

PEM DN 32, Ø in

= 28,0

1 coil 2 coils 3 coils 4 coils

182

94

2 x 443

2 x 220

3 x 620

3 x 471

4 x 775

4 x 660

129

91

37

2 x 419

2 x 376

2 x 165

3 x 670

3 x 640

3 x 329

4 x 1117

4 x 914

4 x 400

DHP-H,

-C, -L

Size

6

8

10

12

Pytg kPa

31

33

67

64

Calculated maximum coil length per coil, in metres

PEM DN 40, Ø in

= 35,2

1 coil 2 coils 3 coils 4 coils

517

367

2 x 775

2 x 660

3 x 1033

3 x 943

4 x 1033

4 x 825

394

291*

2 x 1340 3 x 1675 4 x 1675

2 x 1067 3 x 1280 4 x 1600

16 56 119 2 x 560 3 x 933 4 x 1120

*) When dimensioning size 12, a borehole depth that exceeds this recommendation for coil length is often required. In such cases two coils should be used.

The different brine coils are distributed form a common collection well. All return lines are led back to the well and are equipped with choke valves because the flow of each individual coil must be adjusted.

Figure 63: The collection well for distributing to several brine

Choke valves

Brine coil 1

Figure 62: Shaft depth for, and insulation of, collector hoses.

8.3 Connection to outdoor unit

Connection for the brine circuit from the heat pump to the outdoor unit can be carried out using pipes or hoses. Depending on what connection is selected and what diameter the connection has, there is a maximum length that the connection may be. The maximum lengths in the table below are based on ethylene glycol

(which is mixed to anti-freeze protection down to -32°C) at 0°C.

DHP-A,

-AL

Size

6

8

10

Pytg kPa

30

63

50

Ø

Calculated maximum coil length between the

HP and outdoor unit, in metres in

Cu22

= 20.0

34

(2 x 17)

Cu28

Ø in

= 25.6

133

(2 x 66.5)

PEM

DN 25

Ø in

= 21.0

48

(2 x 24)

Ø

DN 32 in

PEM

= 28.0

173

(2 x 86.5)

21

(2 x 10.5)

11 *

(2 x 5.5)

98

(2 x 49)

47

(2 x 23.5)

30

(2 x 15)

13 *

(2 x 6.5)

150

(2 x 75)

78

(2 x 39)

12 43 5 *

(2 x 2.5)

26

(2 x 13)

8 *

(2 x 4)

44

(2 x 22)

*) Not recommended because of high liquid speeds with risk of corrosion/noise problems.

Brine coil 2

Collection well coils.

Choke valves with flow indicators (available as accessories from the

Danfoss range) are used to adjust the brine flow so that it is the same in all coils.

If choke valves with flow indicators are not available adjust the valves until the temperature of all the coil return hoses is the same.

30 VMBMA202

8.5

DHP-C:

Connection diagram

DHP-A:

If the outdoor unit is installed higher than the heat pump the expansion outlet must be used together with a pressure tank.

If the outdoor unit is installed at the same level or lower than the heat pump, the accompanying plastic vessel can be used.

The upper part of the outdoor unit must then not exceed the fluid level in the vessel.

Figure 64: General connection diagram brine pipes, DHP-C.

Position Name

1

6

7

8

9

10

2

3

4

5

Return line, brine

Supply line, brine

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Strainer (part of the filler cock)

Shut-off valve (part of the filler cock)

Safety valve (1.5 bar)

Bleed and expansion tank

Shut-off valve

DHP-H, DHP-L:

Figure 66: General connection diagram brine pipes, DHP-A.

Position Name

1

6

7

8

9

10

11

2

3

4

5

Return line, brine

Supply line, brine

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Strainer (part of the filler cock)

Shut-off valve (part of the filler cock)

Safety valve (1.5 bar)

Bleed and expansion tank

Shut-off valve

Pressure tank

Outdoor unit:

Figure 65: General connection diagram, brine pipes

DHP-H, DHP-L.

Position Name

1

6

7

8

9

10

2

3

4

5

Return line, brine

Supply line, brine

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Strainer (part of the filler cock)

Shut-off valve (part of the filler cock)

Safety valve (1.5 bar)

Bleed and expansion tank

Shut-off valve

Figure 67: Connection diagram, DHP-A -AL outdoor unit

Position Name

1

2

3

Brine in

Brine out

Flexible hoses

VMBMA202 31

DHP-AL:

If the outdoor unit is installed higher than the heat pump the expansion outlet must be used together with a pressure tank.

If the outdoor unit is installed at the same level or lower than the heat pump, the accompanying plastic vessel can be used.

The upper part of the outdoor unit must then not exceed the fluid level in the vessel.

Heat pump Water heater

Figure 68: Connection diagram for brine pipes.

10

11

12

13

6

7

8

9

Position Name

1

2

3

4

5

Return line, brine

Supply line, brine

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Strainer (part of the filler cock)

Shut-off valve (part of the filler cock)

Safety valve (1.5 bar)

Bleed and expansion tank

Shut-off valve

Pressure tank

Outdoor unit

Flexible hoses (not included)

14 Bleed valve (not included)

8.6 Installing brine pipes

1. Determine to which side the brine pipes are to be connected.

2. Route the return line through the return line rubber bellows on the side of the heat pump.

3. Install the return line with all the accompanying components.

Remember to install the filler cock with the filter cover upwards.

4. Route the supply line out through the supply line rubber bellows on the side of the heat pump.

5. Install the supply line with all the accompanying components.

6. Install the expansion tank with the safety valve.

7. Fit both brine pipes with anti-diffusion insulation running all the way from the heat pump to the lead-in in the wall. The brine pipes running outside the house to the collector can be buried, however they must be well insulated.

⚠ Applies to DHP-A, -AL: Bear in mind that the outdoor unit may move during defrosts, use flexible hoses to connect the pipes from the heat pump and pipes on the outdoor unit.

Calculated volume, DHP-H, -C, -L

The volume of the brine system is calculated as follows:

• Heat pump (exchanger and piping) approximately 2 litres

• Expansion tank approximately 3 litres

• Collector (single pipe): PEM 40 approximately 1.0 litre/m; PEM 32 approximately 0.6 litre/m; Cu 28 approximately 0.5 litre/m

Calculated volume, DHP-A, -AL

The volume of the brine system is calculated as follows:

• Heat pump (exchanger, pipe and outer jacket) approximately 47 litres

• Expansion tank approximately 3 litres

• Outdoor unit approximately 7 litres

• Collector (single pipe): 28 mm pipe approx. 0.5 litre/m

Filler cock

When the filler cock is installed on the return line, remember to turn the strainer cover upwards in order to minimise the amount of air that gets into the brine system when cleaning the filter.

1

4 6 7

8.7 Filling the brine system

⚠ NOTE! Before filling the brine system, the electrical installation must be completed so that it is possible to operate the brine pump.

⚠ NOTE! Before filling the brine system for DHP-A, -AL, the water heater MUST be filled.

⚠ NOTE! Always check local rules and regulations before using anti-freeze.

⚠ NOTE! Anti-freeze with corrosion protection additives must be used and mixed to achieve frost protection down to -15°C.

⚠ NOTE! Use only ethylene glycol as anti freeze for DHP-A and

DHP-AL, mixed to achieve frost protection down to -32°C.

4

5

6

7

Position Name

3 Shut-off valve

Shut-off valve

Shut-off valve

Strainer

Shut-off valve

3 5

Figure 69: Filler cock.

32 VMBMA202

Figure 70: Filling the brine system

6

7

8

9

10

11

12

Position Name

1

2

3

4

5

Return line, brine

Supply line, brine

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Shut-off valve (part of the filler cock)

Strainer (part of the filler cock)

Shut-off valve (part of the filler cock)

Safety valve 1.5 bar

Bleed and expansion tank

Shut-off valve

External pump

External container

1. Set the heat pump operating mode to “OFF” in the control computer menu INFORMATION -> OPERAT.

2. Mix water and anti-freeze in the correct proportions in an external container (12). Note that each pack must be well mixed.

3. Check that the freezing point of the mixture is reached using a refractometer (-15°C for DHP-H, -C, -L)(-32°C for DHP-A, -AL).

4. Fill the system with the mixture using an external pump (11) which can bleed the brine pipes. Connect the pressure side of the pump to the filler connection at valve (5).

5. For DHP-A, -AL: Open the defroster shunt in the control computer menu SERVICE -> MANUAL TEST -> SHUNT DEFR, set the value to .

6. Close valve (4).

7. Open valves (5) and (10).

8. Connect a transparent hose (3) that opens out into the external container (12).

9. Open valve (3).

10. Start the external pump (11) and fill the brine pipes.

11. Start the brine pump manually in the control computer menu

SERVICE -> MANUAL TEST -> BRINEPUMP, set the value to 1.

12. Run the brine pump and the external pump (11) in series until fluid, clear of air, comes out of the return hose from the valve

(3).

13. Stop the brine pump in the control computer menu SERVICE

-> MANUAL TEST -> BRINEPUMP, set the value to 0, at the same time leave the external pump running.

14. Open valve (4) with the external pump running to eliminate the air between the valves (3) and (5).

15. Close valve (3) and pressurise the system using the external pump. NOTE! Max. 150kPa, (1.5bar) .

16. Close valve (5).

17. For DHP-A, -AL: close the defroster shunt in the control computer menu SERVICE -> MANUAL TEST -> SHUNT DEFR, set the value to 0.

18. Stop the external pump (11) and disconnect the filling equipment.

19. Install insulation on the filler cock.

8.8 Bleeding the brine circuit

NOTE! When topping up, the brine pump must be running.

1. Start the brine pump in the control computer menu SERVICE ->

MANUAL TEST -> BRINEPUMP, set the value to 1.

2. Check that the level in the bleed tank (9) is stabilised.

3. Dismantle the safety valve (8) on the bleed tank.

4. Top up with brine to 2/3 of the tank through the connection on which the safety valve (8) was installed.

5. Leave the brine pump running so that that the air in the system collects in the bleed tank.

6. As air separates in the bleed tank the fluid level drops, top up as in step 4.

7. Reinstall the valve (8) when all air has been removed from the system..

8. Open valve (8) and release any overpressure. The fluid level should not fall below 2/3 of the height of the tank.

9. Check that valve (3) is closed.

10. Stop the brine pump in the control computer menu SERVICE ->

MANUAL TEST -> BRINEPUMP, set the value to 0.

11. Switch to the desired operating mode if the heating system has been filled and bled.

Collect any excess brine in a plastic container for topping up the system if necessary (leave it with the customer).

8.9 Vent outdoor unit, DHP-A, -AL

If the outdoor unit is installed higher than the heat pump with a pressurised brine system, the outdoor unit must be bled using the bleed screws on the connection pipes.

The side covers of the outdoor unit must be removed to access the bleed screws.

Bleed screws

Figure 71: Bleed screw locations.

If the outdoor unit is installed at the same level or lower than the heat pump it is recommended that the brine circuit in the outdoor unit is also bled.

VMBMA202 33

9 Installing accessories/additional functions

9.1 Room temperature sensor

⚠ NOTE! The room temperature sensor is connected to a safety extra-low voltage.

1. Install the room temperature sensor in a location in the house where the room temperature is relatively constant:

• Centrally located in the house

• At eye level

• Not in direct sunlight

• Not in a draft

• Not in a room with alternative heating

2. Hang a thermometer next to the room temperature sensor in order to calibrate it after connecting it.

Figure 72: Connecting the room temperature sensor.

3. Connect the room temperature sensor to terminal blocks 303 and 304.

4. After connecting the room temperature sensor, it is calibrated by pressing all buttons for 15 seconds and then setting the actual room temperature that the thermometer shows.

If the display shows “--” no outdoor temperature has been read.

9.2 EVU function

The EVU function prevents the operation of HEATPUMP, ADD.HEAT and CIRC.PUMP as long as the contact is closed. The text EVU STOP is shown in the display when this function is active.

Figure 73: Connection diagram for the EVU function.

• The EVU function is activated by making a connection between terminal blocks 307 and 308 using an external 1-pin timer.

9.3 Tariff control

The room temperature lowering function provides a regular, temporary lowering of the indoor temperature.

10 kohm

Figure 75: Level switch in the expansion tank/bleed tank.

Position Name

1

2

3

Safety valve

Level switch

Floats

Figure 76: Connection diagram for the flow switch or level switch.

• Connect the flow switch or level switch to terminal blocks 217 and 219.

9.5 Higher hot water temperature

⚠ Does not apply to models with refrigerant R134a, models

DHP-C -4H, -5H and -7H.

⚠ NOTE! Never connect the heat pump to provide a higher temperature unless the heating or hot water systems require it. Higher temperatures increase the load on the heat pump.

If necessary, the heat pump can be connected to produce hotter water for the heating system and hot water system when it is installed.

A B

Figure 74: Connection diagram for the tariff control function.

• The tariff control is activated by making a connection between terminal blocks 307 and 308 using an external 1-pin timer and a

10 kohm resistor.

• The extent to which the temperature is lowered is set in the menu INFORMATION -> Heatcurve -> REDUCTION.

9.4 Flow switch/level switch

In certain countries there is a requirement that the heat pump must be equipped with a level switch for the brine system. Always check local rules and regulations before commissioning the heat pump.

Figure 77: The pressure switches on the compressor’s pressure pipe.

1. Move the grey cables, which are normally connected to pressure switch A, to pressure switch B.

34 VMBMA202

10 Start up

NOTE! Read the safety instructions!

⚠ The installation may only be commissioned if the heating system, water heater and brine system have been filled and bled. Otherwise the circulation pumps may be damaged.

⚠ If the installation is only to be run on auxiliary heating, first ensure that the heating system is filled and bled and that neither the brine pump nor the compressor can be started. This is carried out by setting the operating mode to ADD.HEAT.

⚠ Any alarms that may occur in connection with the installation can be fault-traced in the “Troubleshooting” section in the service instructions.

10.2 Manual test

Test operate and at the same time check the function of the tested components.

Activate MANUAL TEST

1. Ensure that the main circuit breaker is on.

2. Select operating mode , in the menu INFORMATION ->

OPERAT.->

3. Open the SERVICE menu by pressing for five seconds.

4. Set the value for MANUAL TEST to 2.

⚠ NOTE! Select position 2 to navigate away from the MANUAL

TEST menu during ongoing test operation!

10.1 Installation checklist

Before manual test operation check the following points:

Piping installation, heating system

• Pipe connections in accordance with the connection diagram

• Flexible hoses on the supply and return lines

• Surge tank on supply line

• Pipe insulation

• Strainer on return line, heating system

• Bleeding of the heating system

• All radiator valves fully open

• Expansion tank heating system (not included in the delivery)

• Safety valve for expansion tank (not included in the delivery)

• Filler cock, heating system (not included in the delivery)

• Leakage inspection

If a an external water heater is installed, also check:

• Exchange valve

• Safety valve for cold water (9 bar)

Electrical Installation

• Circuit-breaker

• Fuse protection

• Direction of rotation of the compressor

• Coolant pump

• At DHP-A, -AL, outdoor unit

• At DHP-A, -AL, defroster sensor

• Positioning of the outdoor sensor

• Control computer settings

If a an external water heater is installed, also check:

• Exchange valve

Brine system

• Expansion/bleed tank on the return line

• Safety valve for expansion tank

• Filler cock on the return line

• Insulation in the outside wall lead-in

• Other brine pipe insulation

• Bleeding of brine system

• Leakage inspection

Test the brine pump

5. Start the brine system’s brine pump by setting the value

BRINEPUMP to 1.

6. Check that the brine pump is running by:

• listening

• putting a hand on the pump

• checking that the level in the expansion tank is stable. If the level is not stable there is air in the system.

• listen for air

7. If the pump does not start see the section, “Starting circulation pumps manually”.

8. If there is air in the brine system, bleed according to section,

“Bleeding the brine system”.

9. Stop the brine pump by setting the value to 0.

Test the circulation pump

10. Start the heating system circulation pump by setting the value

CIRC.PUMP to 1.

11. Check that the circulation pump is running by:

• listening

• putting a hand on the pump

• listen for air

12. If the pump does not start see the section, “Starting circulation pumps manually”.

13. If there is air in the heating system, bleed according to section,

“Bleeding the heating system”.

14. Stop the circulation pump by setting the value to 0.

Test the exchange valve

15. Activate the 3-way valve by setting the value VXV WARMWATER to 1.

16. Check that the arm on the 3-way valve changes position.

17. If the arm does not change position, see the “Troubleshooting” section in the service instructions.

Test the compressor

18. Start the circulation pump by setting the value CIRC.PUMP to 1

19. Start the heat pump compressor by setting the value

HEATPUMP to 1. At the same time as the value is set to 1 for

HEATPUMP the brine pump starts.

NOTE! Risk of burns, the pipe can reach 70-80°C!

VMBMA202 35

10.3 Commissioning

Starting circulation pumps manually

If any of the circulation pumps do not start, it may need to be helped as follows:

Figure 78: The pressure pipe should get hot during operation.

20. Check that:

• the compressor is running in the right direction by putting a hand on the pressure pipe and checking that it is hot.

• it sounds normal and there is no noise.

21. If the pipe does not get hot, or if it sounds abnormal, see the

“Troubleshooting” section in the service instructions.

22. Stop the compressor by setting the value to 0.

23. Stop the brine pump by setting the value to 0.

24. Stop the circulation pump by setting the value to 0.

Testing the auxiliary heating power stages

25. Start the circulation pump by setting the value CIRC.PUMP to 1

26. Start the first auxiliary heating power stage by setting the value

ADD.HEAT 1 to 1.

27. Check that the auxiliary heating power stage works by leaving the menu MANUAL TEST and going into the menu

INFORMATION -> TEMPERATURE -> SUPPLY and check that the temperature rises.

28. Return to the menu MANUAL TEST and stop ADD.HEAT 1 by setting the value back to 0.

29. Repeat steps 26 to 28 for ADD.HEAT 2 and ADD.HEAT 3.

30. Stop the circulation pump by setting the value to 0.

Test fuse protection

31. Start the circulation pump by setting the value CIRC.PUMP to 1

32. Start the compressor by setting the value HEATPUMP to 1.

33. At the same time, start the auxiliary heating power stages available to check that the fuse protection can withstand full power operation.

34. Stop the auxiliary heating power stages and the compressor by setting the value back to 0.

35. Stop the circulation pump by setting the value to 0.

Test the outdoor unit for DHP-A, -AL

36. Start the defroster shunt by setting the value SHUNT DEFR to 1.

37. Start the fan at low speed by setting the FAN L value to 1.

Check that the fan runs at low speed.

38. Start the fan at high speed by setting the FAN H value to 1.

Check that the fan runs at high speed.

Exit test operation

39. Set the value for MANUAL TEST to 0.

Figure 79: Bleed screw location.

1. Open and remove the bleed screw on the front of the pump.

Normally a small amount of water comes out when it is removed.

2. Insert a flat blade screwdriver and turn it in the direction of rotation of the pump (clockwise).

3. Reinstall the bleed screw with its rubber seal.

Adaptation to the heating system

Adjust the heat pump settings to the applicable heating system, for instance an underfloor heating or radiator system. The delta temperature must be at least 8°C above the heat pump. The delta temperature should be 3-5°C for the brine system. If none of the delta temperatures are reached, the flow of the circulation pumps may need adjusting depending on the applicable heating system.

Noise check

During transportation and installation there is a certain risk that the heat pump can be damaged, components may move or get bent and this can cause noise. Because of this it is important to check the heat pump when it has been installed and is ready to be commissioned to ensure that everything seems in order. The heat pump should be run in both heating and hot water modes to ensure that there is no abnormal noise. While doing this, check that there is no abnormal noise in other parts of the house.

Noise is produced from the outdoor unit when the fan is in operation, check during that manual operation that there is no disturbance in your own home as well as to any neighbours. A noise kit is available for purchase for the outdoor unit for DHP-A 10 and 12 if it is necessary to reduce the noise.

Select operating mode

Set the heat pump to the desired operating mode in the menu

INFORMATION -> OPERAT. If necessary, set certain parameters in the control computer, such as ROOM and CURVE.

10.4 Installing the front cover

NOTE! Take care not to damage the front cover!

1. Align the upper section of the front cover with both the side channels at the top of the unit and slide it carefully downwards until it covers the entire front of the unit.

2. Tighten the screws.

10.5 After start up

⚠ NOTE! Remember that it takes time for the heat pump to heat a cold house. It is best to let the heat pump work at its own pace and NOT raise or alter any values in the control computer to try to heat it up more rapidly.

⚠ NOTE! If there is an LP alarm in conjunction with installation it usually means that there is air in the system. Normally the alarm disappears after a few days. If the alarm does not stop the brine circuit must be bled and topped up.

36 VMBMA202

11 Customer information

After installation and test operation, the customer must be informed about their new heat pump installation. Below is a checklist regarding the information that the installer must give the customer:

• The model of the heat pump that has been installed

• Run through the Maintenance instructions and show what it contains

• Describe the various operating modes and what they mean

• Describe the most common alarms and corrective actions

• Demonstrate how to navigate the control computer and which settings the customer can set themselves

• Demonstrate how to view history and operating times

• Show the pipe installation and go through the periodic maintenance actions that the customers must be aware of:

- recommended pressure on manometers

- fill the heating system

- exercise safety valves

- clean strainers

• Explain how the customer can fine adjust their existing heating system according to the instructions in the maintenance instructions

• The applicable warranties

• Where the customer is to turn for servicing

• Finally, fill in the reference list at the back of the Maintenance instructions.

VMBMA202 37

Service instructions

12 The heat pump

12.1 Function description

A heat pump utilises the free energy found in a natural heat source, such as rock, ground, ground water or air. The heat pump can be compared to a reversed refrigerator. In a refrigerator, heat is transferred from the inside of the refrigerator to the outside. In a heat pump the heat that is stored in a heat source is transferred to the inside of the house. The heat pump uses the energy in the heat source and gives back two to three times more heat energy than what it uses in electrical energy. The heat pump is, therefore, a very environmentally friendly and economical way of heating a house.

In order for the heat pump to be able to retrieve heating energy from the heat source and transfer it to the heating system of the house, three separate fluid circuits are required.

The circuit that retrieves the heating energy from the heat source is called the brine circuit and it maintains a low outgoing temperature to be heated by the heat source.

The next circuit is called the refrigerant circuit and is a closed circuit which takes the retrieves heating energy and transfers it to the last circuit, the heat transfer fluid circuit.

The heat transfer fluid circuit holds the fluid that circulates in the heating system of the house and in the heat pump’s water heater.

The figure below shows how the different circuits work together in the transfer of heating energy.

Heating system and water heater

Heat transfer fluid circuit – is the circuit that contains the water that transports the heat/energy to the heating system and the water heater.

Condenser

Expansion valve/ pressure drop

Compressor/ pressure increasing

Enclosed refrigerant Evaporator

Refrigerant circuit – is the circuit that contains a chlorine and freon free refrigerant which, inside the heat pump, transfers the energy retrieved from the brine circuit through evaporation, compression and condensation, and supplies it to the heat transfer fluid circuit.

Brine circuit – is the circuit that contains an antifreeze water based mix that obtains and transports energy from the heat source to the heat pump. This circuit is also known as the collector.

Brine

Rock, ground, ground water or air

Figure 80: Function principles of a heat pump.

1 A fluid (brine) filled hose is lowered into a lake, buried in the ground or lowered into bedrock. The brine obtains energy from the heat source by the fluid temperature in the hose being heated a few degrees by the surrounding heat source. The fluid filled hose is also known as a collector.

2 The brine is guided into the heat pump’s evaporator. The enclosed refrigerant in the refrigerant circuit is forced to boil as the pressure in the expansion valve drops and later evaporates to a gas in the evaporator. The energy produced during this process is released by the slightly heated brine.

3 The refrigerant that now contains a large quantity of energy in the form of heat is transferred to the compressor, which both increases its temperature and pressure.

4 The refrigerant then continues to the condenser. When condensing, the refrigerant supplies its heat energy to the heat transfer fluid circuit. The refrigerant’s temperature decreases and returns to a liquid state.

5 The heat transfer fluid circuit transports the heat energy out to the water heater, radiator and the under floor heating system, which heat up.

6 The refrigerant is then transported through the expansion valve where the pressure drops and the refrigerant starts to boil and then the process starts again.

12.2 Components

The heat pump is a complete heat pump installation for heating and hot water. It has the market’s first compressor developed solely for heat pumps. It has an integrated 180 litre water heater and auxiliary heating. TWS stands for Tap Water Stratificator. This technology results in more effective heat transfer and more effective layering of the water in the water heater.

The heat pump is equipped with control equipment, which is controlled via a control panel.

Heat enters the house via a water borne heating system, a low temperature system. The heat pump supplies as much of the heat demand as possible before auxiliary heating is engaged and assists.

The heat pump unit consists of five basic units:

38 VMBMA202

1 Heat pump unit

• Scroll compressor

• Stainless steel heat exchanger

• Circulation pumps for brine and heating systems

• Valves and safety equipment for cooling systems and corresponding electrical components.

2 Water heater

• 180 litres

• Internal anti-corrosion protection with copper or stainless steel

• It does not have an anode, which makes it maintenance free

3 Exchange valve

• The heated water either passes through to the heating system or to the water heater depending on whether heating or hot water is to be produced

4 Auxiliary heat

• 9 kW electric heating element (4.5 kW at 230 V heat pump installation)

• Electric heating element control in maximum of three steps (five steps for DHP-A, -AL)

• Installed on the heating system’s supply line

• Covers the demand of extra energy if the heat pump’s capacity is exceeded

• Automatically connected if operating mode AUTO is selected.

5 Control equipment

• Control computer with graphic display

• Temperature sensors (outdoor, supply line, return line, brine and hot water)

• Room sensor (option)

The control equipment controls the heat pump unit’s included components (compressor, circulation pumps, auxiliary heaters and exchange valve) and determines when to start and stop the pump as well as producing heat for the house or hot water.

Figure 81: Heat pump components.

12.3 Outdoor unit and defroster function, DHP-A, -AL

4

3

5

1

2

Figure 82: The figure shows DHP-AL which has a separate water heater.

The DHP-A and DHP-AL heat pumps are equipped with an outdoor unit that uses air as a heat source down to -20°C. The outdoor unit has a coil where brine recovers free energy from the outside air. It also has a fan which increases the air flow through the coil. During operation the coil is cooled by the energy exchange at the same time as the humidity causes it to become covered in frost. DHP-AL has an automatic function to defrost the coil using the produced heat energy. If necessary, a defrosting sequence starts which means the following:

• The defrosting sequence starts when the temperature of the brine reaches its set parameter for defrosting.

• The compressor is stopped so that the defrosting sequence should not load the compressor unnecessarily. On the other hand the compressor is not stopped when it produces hot water because the water heater is cooled when defrosting. The fan on the outdoor unit is stopped in conjunction with defrosting to shorten the time of defrosting.

VMBMA202 39

• The shunt valve in the heat pump opens so that hot brine from the defrosting tank is mixed with the cold brine circulating to the outdoor unit. The mixture has a temperature of about 15°C.

• The fifteen degree heated brine melts the frost on the outside of the battery at the same time as the liquid is cooled.

• When the brine is no longer cooled to temperatures below 11°C the battery is sufficiently defrosted.

• The shunt valve closes the flow of hot brine from the defrosting tank.

• Operation returns to normal.

12.4 Passive cooling function, DHP-C

Heat pump DHP-C is equipped with an extra heat exchanger to use the passive cooling effect from the brine. Because the temperature in the collector (borehole or equivalent) is lower than the indoor temperature, the temperature difference can be exploited to cool the indoor air. At the same time the collector is charged with energy before the cold periods of the year.

DHP-C is a complete installation for heating, hot water and passive cooling where the control automatically ensures that the desired indoor climate is reached. Because the DHP-C uses the same pipe system for heating and cooling, it is important to use a temperature when cooling that does not cause condensation on the pipe system. (If the system is not adapted to it.) Use of fan convectors is recommended.

12.5 Auxiliary heating, DHP-H, -L, -C

If the heat demand is greater than the heat pump’s capacity, the auxiliary heater engages automatically. The auxiliary heater is made up of an electric heating element on the supply line that has two outputs, ADD.HEAT 1 and ADD.HEAT 2, and can be controlled in three steps.

For three phase, 400V 3N, installations:

• Step 1 = ADD.HEAT 1 = 3 kW

• Step 2 = ADD.HEAT 2 = 6 kW

• Step 3 = ADD.HEAT 1 + ADD.HEAT 2 = 9 kW

For single phase, 230V 1N SP, installations:

• Step 1 = ADD.HEAT 1 = 1.5 kW

• Step 2 = ADD.HEAT 2 = 3 kW

• Step 3 = ADD.HEAT 1 + ADD.HEAT 2 = 4.5 kW

To calculate the total energy consumption, see the ”Settings- Calculating energy consumption” section.

In the event of an alarm, the auxiliary heater engages automatically.

12.6 Auxiliary heating DHP-A, -AL

The auxiliary heater for 400V 3N heat pumps is made up of an electric heating element on the supply line that has three outputs, ADD.

HEAT 1, ADD.HEAT 2 and ADD.HEAT 3, and can be controlled in five steps.

• Step 1 = ADD.HEAT 1 = 3 kW

• Step 2 = ADD.HEAT 2 = 6 kW

• Step 3 = ADD.HEAT 1 + ADD.HEAT 2 = 9 kW

• Step 3 = ADD.HEAT 2 + ADD.HEAT 3 = 12 kW

• Step 5 = ADD.HEAT 1 + ADD.HEAT 2 + ADD.HEAT 3 = 15 kW

In the event of an alarm, the auxiliary heater engages automatically.

The last two steps, step 4 and step 5, cannot be activated when the compressor is running. There are further auxiliary heating steps: step

+4 and step +5, which means that the compressor does not stop when they are activated. These can be selected on the condition that the building where the heat pump is installed has a large heating requirement.

The auxiliary heater for 230V 1N heat pumps is made up of an electric heating element on the supply line that has two outputs, ADD.HEAT

1 and ADD.HEAT 2, and can be controlled in three steps:

• Step 1 = ADD.HEAT 1 = 1.5 kW

• Step 2 = ADD.HEAT 2 = 3 kW

• Step 3 = ADD.HEAT 1 + ADD.HEAT 2 = 4.5 kW

In the event of an alarm, the auxiliary heater engages automatically.

40 VMBMA202

12.7 Water heater, DHP-H, -C

Danfoss heat pumps DHP-H, -C, are supplied with an integrated 180 litre water heater.

1

2

7 8

Position Name

1

2

3

4

5

6

7

8

Hot water line

Temperature sensors

Water heater

TWS coil

Start temperature sensor

Return from TWS coil

Filler pipe

Flow line to TWS coil

3

4

5

6

Figure 83: Water heater in DHP-H and DHP-C.

Hot water production is prioritised ahead of heat production, i.e. no heat is produced if there is a hot water demand at the same time.

The temperature of the hot water cannot be adjusted. Normally, hot water production does not cease at a determined temperature but when the compressor’s operating pressure switch reaches its maximum operating pressure, which corresponds to a hot water temperature of approximately 50-55°C.

Using a regular time interval, the water in the water heater is given extra heat by the integrated auxiliary heater to prevent the build up of bacteria (legionella function). The factory set time interval is seven days. When the legionella function is active the heat pump produces hot water until the temperature for the start temperature sensor (5) has reached 60°. If the heat pump cannot raise the temperature sufficiently within 3.5 hours the control checks if there is any heating requirement, before legionella function is resumed.

In the control computer’s TEMPERATURE menu, a number of measured and calculated temperatures for the hot water and supply are displayed. The current hot water temperature (2) and the temperature of the supply line during heating and hot water production is displayed. The temperature of the supply line often exceeds the maximum permitted hot water temperature, but usually during hot water production.

12.8 Water heater, DHP-A, -AL

The difference between DHP-A and DHP-AL’s water heaters and other DHP models is the defrost function of the outdoor unit, otherwise they are the same and have the same functions.

The difference between a DHP-A and a DHP-AL is only that the hot water heater is integrated in DHP-A and that the water heater is externally placed in a separate cabinet for DHP-AL.

The integrated 180 litre hot water heater has a defrosting tank (mantel) outside the heater that contains heated brine (approx 47 litres) which is used during defrosting.

1 2

3

Position Name

1

2

3

4

5

Tap hot water

Temperature sensors

4

5

Defrosting tank

Water heater

TWS coil

Filler pipe 6

7

8

Flow line to TWS coil

Expansion outlet when outdoor unit is positioned at high level

Figure 84: Water heater for DHP-A and DHP-AL.

VMBMA202 41

12.9 Important parameters

Heat production - calculating

The indoor temperature is adjusted by changing the heat pump’s heat curve, which is the control computer’s tool for calculating what the supply temperature should be for water that is sent out in the heating system. The heat curve calculates the supply temperature depending on the outdoor temperature. The lower the outdoor temperature, the higher the supply temperature. In other words, the supply temperature of the water fed to the heating system will increase exponentially as the outside air temperature falls.

The heat curve will be adjusted in connection with installation. It must be adapted later on, however, to obtain a pleasant indoor temperature in any weather conditions. A correctly set heat curve reduces maintenance and saves energy.

CURVE

The control computer shows the value for CURVE by means of a graph in the display. You can set the heat curve by adjusting the CURVE value.

The CURVE value indicates the supply temperature of the water to be sent out to the heating system at an outdoor temperature of 0°C.

Supply temperature

Maximum supply temperature

Value for CURVE is 40...

Outdoor temperature

...at zero degrees

Figure 85: Graph showing the set value 40 for CURVE.

At outdoor temperatures colder than 0°C, supply water hotter than 40°C is sent out to the heating system and at outdoor temperatures greater than 0°C, supply water cooler than 40°C is sent out.

Supply temperature

Maximum supply temperature

Outdoor temperature

Figure 86: Increasing or reducing the CURVE changes the slope of the curve

If you increase the CURVE value, the heat curve will become steeper and when you reduce it, it will become flatter.

The most energy efficient and cost effective setting is achieved by changing the CURVE value to adjust the temperature in the house to an even and constant temperature. For a temporary increase or reduction, adjust the ROOM value instead.

42 VMBMA202

ROOM

If you wish to increase or reduce the indoor temperature, change the ROOM value. The difference between changing the ROOM value and the CURVE value is that the system’s heat curve does not become steeper or flatter if the ROOM value is changed, which the curve becomes if the CURVE value changes, instead the entire heat curve is moved by 3°C for every degree change of the ROOM value. The reason that the curve is adjusted 3° is that an approximate 3° increase in supply temperature is needed to increase the indoor temperature 1°.

Supply temperature

Maximum supply temperature

Outdoor temperature

Figure 87: Changing the ROOM value changes the heat curve upwards or downwards.

The relationship of the supply temperature to outdoor temperature will not be affected. The supply temperature will be increased or reduced by the same number of degrees all along the heat curve. I.E. the entire heat curve rises or drops instead of the curve gradient changing.

This method of adjusting the indoor temperatures must only be used for a temporary raise or drop. For long term increases or reductions of the indoor temperature, the heat curve is adjusted instead.

Sometimes, at outdoor temperatures between -5°C and +5°C, part of the heat curve may need adjusting if the indoor temperature is not constant. For this reason, the control system includes a function adjusting the curve at three outdoor temperatures: -5°C, 0°C and +5°C.

This function will allow you to increase or reduce the supply temperature, without affecting the heat curve, at three specific outdoor temperatures. If, for example, the outdoor temperature is -5°C, the supply temperature will change gradually between 0°C and -10°C, maximum adjustment being reached at -5°C. The figure below displays the adjusted CURVE -5. The adjustment can be seen on the graph in the form of a bump.

Supply temperature

Local higher supply temperature at -5°

Outdoor temperature

Figure 88: The adjusted curve at -5°C

You can choose to adjust the heat curve individually at three specified outdoor temperatures: -5°C, 0°C and +5°C. The supply temperature can be changed by plus/minus 5 degrees.

VMBMA202 43

HEATSTOP

The HEATSTOP function automatically stops all production of radiator heat when the outdoor temperature is equal to, or higher than, the value entered for heat-stop.

When the heat-stop function is activated, the circulation pump will be turned off - except when hot water is being produced. The circulation pump will be "exercised" for 1 minute per day. The factory set value for activating heat-stop is an outdoor temperature of 17°C. If the heat-stop function is active, the outdoor temperature must drop 3°C when setting, before the heat-stop stops.

MIN and MAX

The MIN and MAX values are the lowest, respectively highest set point values that are allowed for the supply temperature.

Adjusting the minimum and maximum supply temperatures is particularly important if your home has under floor heating.

If your house has under floor heating and parquet floors, the supply temperature must not exceed 45°C. Otherwise there is a risk that the parquet floors might be damaged. If you have under floor heating and stone tiles, the MIN value should be 22-25°C, even in summer when no heating is required. This is to achieve a comfortable floor temperature.

If your house has a basement, the MIN value should be adjusted to a suitable temperature for the basement in summer. A condition for maintaining the heat in the basement in the summer is that all radiators have thermostat valves that switch off the heat in the rest of the house. It is extremely important that the heating system and the radiator valves are trimmed correctly. As it is usually the end customers themselves who have to carry out trimming, remember to inform them how to carry it out correctly. Also remember that the value for

HEATSTOP needs adjusting upwards for summer heating.

TEMPERATURES

The heat pump can display a graph showing the history of the various sensors’ temperatures and you can see how they have changed over

60 measurement points in time. The time interval between the measurement points can be adjusted between one minute and one hour, factory setting is one minute.

History is available for all sensors, but only the set value is shown in the display for the room sensor. The integral value that may appear is the heating system’s energy balance.

INTEGRAL

The heat demand in the house depends on the season and weather conditions and is not constant. The heat demand can be expressed as temperature difference over time and can be calculated giving an integral value as a result (heat demand). To calculate the integral value, the control computer uses several parameters.

A heat deficit is needed to start the heat pump, and there are two integral values, A1 and A2, which start the compressor and auxiliary heater. During heat production, the deficit reduces and when the heat pump stops, the inertia in the system causes a surplus of heat.

The integral value is a measurement of the surface under the time axis and is expressed in degree minutes. The figure below shows the factory settings for the integral values that the heat pump has. When the integral value has reached the set value for INTEGRAL A1, the compressor starts and if the integral value does not drop but continues to rise, the auxiliary heater starts when the integral value has reached the set value for INTEGRAL A2.

Integral

(Heat demand)

Heat surplus

Compressor start

(-60)

Auxiliary heater start

(-660)

INTEGRAL A1

INTEGRAL A2

Heating deficit

Heat surplus

Compressor stop

(≥0)

Auxiliary heater stop

(latest at -60)

Compressor start

(-60)

Auxiliary heater start

(-660)

INTEGRAL A1

INTEGRAL A2

Time

Auxiliary heater

Compressor

Auxiliary heater

Compressor

No operation No operation

Heat pump operation

Figure 89: Starting and stopping heat pump operation based on integral values.

The integral value calculation stops during hot water production and during . Integral value calculation resumes two minutes after completed hot water production to give the heating system time to stabilise the temperature.

More specific conditions for starting and stopping the heat pump are described in the “Operating conditions” chapter.

44 VMBMA202

HYSTERESIS

In order to start the heat pump in advance during sudden changes of the heat demand, there is a value, HYSTERESIS, which controls the difference between the actual supply temperature, t

1

and the calculated supply temperature, t

2

. If the difference is the same or greater than the set HYSTERESIS value (x), i.e. there is a heat demand, or the heat demand disappears, quicker than the usual integral calculation, the integral value is forced to either the start value INTEGRAL A1 or to the stop value 0°min.

SUPPLY TEMP.

t

1 t

2

HYSTERESIS

(∆t) ≥ x

HYSTERESIS

(∆t) ≥ x

Compressor start

(-60)

INTEGRAL

TIME

Compressor stop

(0)

Figure 90: Conditions for HYSTERESIS to force the integral value to change.

VMBMA202 45

DEFR CURVE, defrosting curve for DHP-A, -AL

To start defrosting the outdoor unit for DHP-A, -AL, the control computer makes a calculation using the temperature of the brine return and the outdoor temperature.

What guides the calculation is a linear defrosting curve that can be set so that the heat pump and outdoor unit work optimally. The setting of three different values can be changed: DEFR CURVE 0 , DEFR CURVE –20 and OUTDOOR STOP. The defrosting sequence starts when the temperature of the brine return reaches the set parameter value at an outdoor temperature somewhere along the set defrosting curve.

The two parameters that are mainly changed are DEFR CURVE 0 and DEFR CURVE -20. The numbers behind the DEFR CURVE display what outdoor temperature the setting is for, that is to say at 0°C for DEFR CURVE 0 and the temperature that is set for OUTDOOR STOP for DEFR

CURVE -20. What DEFR CURVE -20 actually stands for is DEFR CURVE [ printed value for OUTDOOR STOP ].

Factory setting for OUTDOOR STOP is -20°C. At this outdoor temperature, compressor operation is stopped and the addition takes over. It is seldom that the value of OUTDOOR STOP needs to be changed, tests and operating cases have shown that -20°C operates very well as the stop temperature. In the text and figures below the value -20°C has been used for OUTDOOR STOP.

The control computer shows the value for DEFR CURVE 0 and DEFR CURVE –20 by means of a graph in the display.

Temperature, input brine line

Set value for

DEFR CURVE -20

Adjustable interval for DEFR CURVE 0 is a brine return between -5°C and -15°C at 0°C outdoor temperature

Outdoor temperature

Figure 91: Graph that shows how the value for DEFR CURVE 0 can be set.

The value for OUTDOOR STOP that is set means that the compressor will no longer be used for heating or hot water production if the outdoor temperature is the same as or lower than the value. Heating and hot water production then occurs with the help of the auxiliary heater.

The value for DEFR CURVE 0 is the temperature that the brine return is permitted to reach when a defrost must start at outdoor temperature 0°C.

In the corresponding way the value for DEFR CURVE -20 is the temperature that the brine return has when a defrost should start at the set outdoor temperature for OUTDOOR STOP. The setting for DEFR CURVE –20 means that the value OUTDOOR STOP (-20°C) is reduced by between 1 and 8 degrees. This also determines how much lower the temperature for the brine return may be than -20°C in this case.

Temperature, input brine line

Set value for

DEFR CURVE 0

Adjustable value for DEFR CURVE -20 is

1°C to 8°C lower than OUTDOOR STOP

Outdoor temperature

Set value for OUTDOOR STOP, -20°C

Figure 92: Graph that shows how the value for DEFR CURVE -20 can be set.

These three settings together create the defrosting curve and all three values have an effect on when defrosting will start, even if it is mainly DEFR CURVE 0 and DEFR CURVE -20 that is changed.

46 VMBMA202

13 Control computer

13.1 Function description

A control computer is used to automatically calculate the heat demand in the house where the heat pump is installed and to ensure that the correct amount of heat is produced and emitted where necessary. There are many different values (parameters) that must be referred to during the calculation of the heat demand. During installation use the control computer to set and change certain values that have to be adapted according to the house demand. The control computer is also used during service to view alarms and history, and to check the value settings. The display window, keypad and an indicator are on the front of the control computer. It consists of a simple menu system that is used to navigate the desired settings and values.

ROOM 20°C

(20°C)

NO DEMAND HEAT

OPERAT. AUTO

The symbols in the display are only examples. Certain symbols cannot be displayed at the same time.

Figure 93: Display, control buttons and indicator for the heat pump.

Use the four control buttons on the keypad to navigate the menus and increase or reduce the set values:

• An up button with a plus sign

• A down button with a minus sign

• A right button with a right arrow

• A left button with a left arrow

The display always shows the set ROOM value and the status of the heat pump.

There are two main menus that are used to affect the heat pump settings. The menus are designed for two categories of user, end customers and installers, who make different settings in the control computer. For this reason the service menu is hidden from end customers.

INFORMATION

5s

SERVICE

Figure 94: The menus are reached via different button presses.

The main menu, INFORMATION, is opened by pressing the left or right buttons. From the INFORMATION menu you can open the sub menus to make settings for the heat pump.

For installation or service, the hidden menu, SERVICE, is used. This is opened by holding the left button depressed for five seconds. From the service menu you can open sub menus to make advanced settings.

VMBMA202 47

13.2 Display

The display of the control computer shows information about the heat pump’s operation, status and any alarms, in text form. The status, indicated by symbols, is also shown in the lower section which shows the heat pump’s active process.

Operating mode

Appears with applicable heat pump operating status text.

Operating mode

(OFF)

AUTO

HEATPUMP

ADD. HEAT

HOT WATER

Meaning

The installation is fully switched off.

⚠ Remember that if the operating mode OFF is to be used for long periods during the winter, the water in the heating system in the installation must be drained, otherwise there is a risk of frost damage.

The heat pump and the auxiliary heater are automatically controlled by the control computer.

The control computer is controlled so that only the heat pump unit (compressor) is allowed to operate. In this operating mode peak heating charging (legionella function) of the hot water will not be run because additional heat must not be used.

The control computer only permits the auxiliary heater to be in operation. This operating mode can be used when a new installation is being used, when the brine system is not ready for operation.

In this mode the heat pump only produces hot water, no heat goes to the heating system.

Symbols

Displays the operating status of the heat pump using symbols.

Symbol

HP

Meaning

Indicates that the compressor is in operation.

LIGHTNING Indicates that the auxiliary heater is in operation. Number of auxiliary power stages indicated by digit.

HOUSE Indicates that the 3-way valve position is for heat production for the house.

TAP Indicates that the 3-way valve’s position is for hot water production.

F FLOW GUARD An “F” next to the symbol indicates that a flow guard is installed.

CLOCK Indicates that tariff control is active.

TANK

SQUARE

DEFROST

Indicates the level of hot water in the water heater. During charging, the tank is filled and filling starts at the set start temperature. A lightning symbol by the symbol indicates peak heating charging (legionella function).

Either indicates that the operating pressure switch has deployed, or that the hot gas temperature has reached its maximum temperature.

Displayed if defrosting is active. (DHP-A, -AL)

FAN

COOLING

Displayed if the fan is active L=Low speed and H= High speed. (DHP-A, -AL)

Indicates Cooling. A indicates active cooling.

Text

Appears with applicable heat pump operating status text.

Message

ROOM

Meaning

Shows the set ROOM value. Standard value: 20°C.

If the accessory room sensor is installed it shows the actual temperature and the desired indoor temperature within brackets.

48 VMBMA202

Message

ERR PHASE SEQ.

HIGH RETURN

START

EVU STOP

NO DEMAND HEAT

HIGHPRESS ERROR

LOWPRESS ERROR

MOTOR P ERROR

BRINEFLOW LOW

SENSOR

HEATPUMP START --MIN

HEATPUMP+ADD.HEAT

START_MIN

ADD. HEAT

COOLING

COOLING A

DEFROST

Meaning

Alarm that indicates that there is an incorrect phase sequence to the compressor. Only display and only the first 10 minutes.

Alarm that indicates that the high return temperature prevents the compressor’s operation.

Indicates that there is a demand for heating production and that no start delay is active.

Indicates that the additional function EVU is active. This means that the heat pump is off as long as EVU is active.

Indicates that there is no heating production demand.

Alarm that indicates that the high pressure switch has deployed.

Alarm that indicates that the low pressure switch has deployed.

Alarm that indicates that the motor protection has deployed.

Appears if the accessory flow switch is installed. Alarm that indicates that the flow in the brine system is low.

Alarm that indicates a faulty sensor.

Indicates that there is a heating production demand and will start in the specified number of minutes.

Indicates that heat production is active with both compressor and auxiliary heater.

Indicates that there is a demand for heating production but that a start delay is active.

Indicates that there is an auxiliary heater demand.

Displayed if cooling is passive.

Displayed if cooling is active.

Displayed if defrosting is active. (DHP-A, -AL)

VMBMA202 49

14 Menus

14.1 Main menu INFORMATION

This menu is used to change the heat pump’s operating modes and adjust the heat curve. History and operating times can also be viewed here. Open the menu by pressing the left or right button. The sub menus available in the INFORMATION menu are shown in the following table:

Main menu

INFORMATION

Sub menu Selection/settings

OPERATION

Ø

AUTO

HEATPUMP

ADD. HEAT

HOT WATER

MANUAL TEST

HEATCURVE

CURVE

MIN

MAX

CURVE +5

CURVE 0

CURVE -5

HEATSTOP

REDUCTION

ROOM FACTOR

POOL

POOL HYSTERESIS

HEAT CURVE 2 (Expansion card)

CURVE 2

MIN

MAX

TEMPERATURE

OUTDOOR

ROOM

Supply line

Return line

HOT WATER

INTEGRAL

BRINE OUT

BRINE IN

POOL

SHUNTGROUP

COOLING

CURRENT

OPERAT.TIME

HEATPUMP

ADD. HEAT 1

ADD. HEAT 2

ADD. HEAT 3

HOT WATER

COOLING

COOLING A

DEFROST (Defrost card)

DEFROSTS

BETW. 2 DEFR

TIME SINCE DEFROST

FAN H OFF AT

DEFROST CURVE

MANUEL DEFR

Menus in italics are only visible if the expansion card or defrosting card (DHP-A, -AL) is installed.

50 VMBMA202

Sub menu INFORMATION -> OPERATION

Used to select operating mode.

Menu selection Meaning

The installation is off. Any active alarms reset.

(OFF)

AUTO

HEATPUMP

ADD. HEAT

HOT WATER

MANUAL TEST

Automatic operation with both heat pump and auxiliary heater permitted. If the number of power stages for auxiliary heating are set to zero (SERVICE -> AUX.HEAT -> MAX STAGE) only AUTO or OFF can be selected as operating mode.

Operation with only heat pump permitted. NOTE! No peak heating charging (legionella function) with only heat pump operation.

Operation with only auxiliary heater permitted.

Operation with heat pump for hot water production and auxiliary heater during peak heating charging (legionella function).

Only appears when MANUAL TEST in the SERVICE menu is active. Outputs controlled manually.

-

-

-

-

-

-

Factory setting

Sub menu INFORMATION -> HEAT CURVE

Used to change settings for the heat curve.

Menu selection

CURVE

MIN

MAX

CURVE 5

CURVE 0

CURVE -5

HEATSTOP

REDUCTION

ROOM FACTOR

POOL

(Expansion card)

POOL HYSTERESIS

(Expansion card)

Meaning

Calculated supply temperature at 0°C outdoor temperature. Shown as a graph that also shows MIN and MAX values.

Minimum permitted supply temperature, if the temperature for heat-stop has been reached and the heat pump has stopped.

Maximum permitted supply temperature.

Local increase or reduction of CURVE at an outdoor temperature of +5°C. Shown in the graph for CURVE.

Local increase or reduction of CURVE at an outdoor temperature of 0°C. Shown in the graph for CURVE.

Local increase or reduction of CURVE at an outdoor temperature of -5°C. Shown in the graph for CURVE.

Maximum outdoor temperature when heat production is permitted.

If HEAT STOP applies, the outdoor temperature must drop 3°C below the setting before

HEAT STOP stops.

Only appears if the tariff control function has been activated. Lowering set room temperature. Active at 10 kohm connection at EVU input.

Only displayed if an accessory Room temperature sensor is installed.

Determines how large an impact the room temperature is to have when calculating the supply temperature. For underfloor heating we recommend a setting between 1-3 and for radiator heating between 2-4.

Only appears if POOL is selected. The temperature in the pool is controlled by a separate sensor regardless of the heating and hot water system.

Only appears if POOL is selected. In simple terms, the POOL HYSTERESIS is the temperature interval between start and stop for pool heating. If the difference between the actual supply temperature to pool and the calculated supply temperature is too great, either the integral value is set to start value A1 (the heat pump starts) or the value is set to 0 (stops the heat pump).

Factory setting

40°C

(during under floor heating

30°C)

(interval: 22°C / 56°C)

10°C

(interval: 10°C / 50°C)

55°C

(during under floor heating

45°C)

(interval: 40°C / 85°C)

0°C (interval: -5°C / 5°C)

0°C (interval: -5°C / 5°C)

0°C (interval: -5°C / 5°C)

17°C

(interval: OFF, 0°C / 40°C)

2°C (interval: 1°C / 10°C)

2 (interval: 0 / 4)

(0 = no impact,

4 = large impact)

20°C

(interval: OFF, 5°C / 40°C)

2°C (interval: 1°C / 10°C)

Sub menu INFORMATION -> HEAT CURVE 2

The menu only applies if the expansion card is installed and only appears if shunt group sensor is connected and activated in menu

SERVICE -> INSTALLATION -> SYSTEM -> SHUNTGROUP (Expansion card). Used to change settings for heat curve 2.

Menu selection

CURVE 2

MIN

MAX

Meaning

Calculated shunt group temperature at 0°C outdoor temperature. Shown as a graph that also shows MIN and MAX values.

Minimum permitted shunt group temperature, if the temperature for heat-stop has not been reached.

Maximum permitted shunt group temperature.

Factory setting

40°C

(interval: 22°C / 56°C)

10°C

(interval: 10°C / 50°C)

55°C

(interval: 15°C / 70°C)

VMBMA202 51

Sub menu INFORMATION -> TEMPERATURE

Used to indicate the prevailing temperatures, history and set/calculated values. History can be accessed to view all the values by pressing the right arrow to present a graph of the last 100 measurement points for the set time interval (SERVICE -> INSTALLATION -> LOGTIME). In the event of an alarm, history stops being logged until the alarm is reset by changing the operating mode to OFF.

Menu selection Meaning Factory setting

OUTDOOR

ROOM

Supply line

Return line

HOT WATER

INTEGRAL

BRINE OUT

BRINE IN

POOL

(Expansion card)

SHUNTGROUP

(Expansion card)

COOLING

(Expansion card)

CURRENT

(Expansion card)

Shows the actual outdoor temperature.

Shows the actual set temperature.

Shows the actual supply temperature. The calculated supply temperature to the heating system group is within brackets.

During hot water production in operating mode ADD.HEAT the value for HOT

WATER STOPP + 5° is shown within brackets.

Shows the actual return temperature. The stop temperature, MAX RETURN is within brackets.

Shows the actual hot water temperature.

Shows the actual calculated value for integral.

Shows the actual temperature for the brine system’s supply line.

Shows the actual temperature for the brine system’s return line.

Only appears if POOL is selected. Shows the actual pool temperature. The set pool temperature is shown in brackets.

Only appears if SHUNTGROUP is selected. Shows the actual supply temperature. The calculated supply temperature to the shunt group is within brackets.

Only appears if COOLING is selected. Shows the actual supply temperature. The set point value is shown in brackets.

Only appears if CURRENT LIMITER is selected. Shows the actual current consumption. The set value for MAX CURRENT is shown between brackets.

-

-

-

-

-

-

-

-

-

-

-

-

Sub menu INFORMATION -> OPERAT. TIME

Used to show the operating time for each component. Time given in hours.

Menu selection

HEATPUMP

ADD. HEAT 1

ADD. HEAT 2

ADD.HEAT 3

(Defrost card)

HOT WATER

COOLING

(Expansion card)

COOLING ACTIVE

(Expansion card)

Meaning

Compressor operating time for both heating and hot water production.

Operating time auxiliary heater power stage 1 with full output 3 kW (VL).

Operating time auxiliary heater power stage 2 with full output 6 kW (VL).

Operating time auxiliary heater power stage 3 with full output 6 kW (VL).

Operating time hot water with compressor.

Operating time passive cooling.

Operating time active cooling.

-

-

-

-

-

-

-

Factory setting

Sub menu INFORMATION -> DEFROST ( DHP-A, -AL )

The menu applies to DHP-A, -AL with defroster card and only appears if OUTDOOR AIR in the SERVICE -> INSTALLATION -> SYSTEM -> HEAT

SOURCE menu is selected. Used to obtain information about outdoor unit defrosting and to make certain settings.

Menu selection

DEFROSTS

BETW. 2 DEFR

TIME SINCE DEFROST

FAN H OFF AT

DEFROST CURVE

MANUEL DEFR

Meaning

Total number of defrosts carried out.

The operating time of the compressor in minutes between the 2 last defrosts.

The operating time of the compressor in minutes since last defrost.

Fan high speed is deactivated at this temperature and low speed is activated.

Here, the angle of the defrost curve can be changed using the right-hand arrow and by either pressing + or – (Change the start temperature for defrost).

By using the right-hand arrow + or -, defrost can be started manually (shunts +20°C for 10 minutes).

Factory setting

-

-

-

12°C

(interval: 10°C / 20°C)

-10°C

(interval: -13°C / -7°C)

0 (interval: 0 / 1)

52 VMBMA202

14.2 Main menu SERVICE

This menu is for use during installation and service to optimise and adjust the operation of the heat pump. Access the menu by holding the left and right arrows in for 3 seconds. The sub menus available in the SERVICE menu are shown in the following table:

Main menu

SERVICE

Sub menu

HOT WATER

Selection/settings

HEATPUMP

START

HOT WATER TIME

HEATING TIME

TOPH.INTERVAL

TOPH.STOP

INTEGRAL A1

HYSTERESIS

MAX RETURN

STARTINTERVAL

ALARM BRINE

PRESSURE PIPE

OUTDOOR STOP

SHUNT COOLING

ADD. HEAT

INTEGRAL A2

HYSTERESIS

MAXSTEP

MAX CURRENT

SHUNTTIME

HOT WATER STOP

MANUAL TEST

INSTALLATION

MANUAL TEST

HEATPUMP

BRINEPUMP

CIRC.PUMP

VXV HOT WATER

SHUNT 1

ADD. HEAT 1

ADD. HEAT 2

ADD. HEAT 3

SHUNT DEFR

FAN L

FAN H

ADD.HEAT EXT

ALARM

SHUNT COOLING

SHUNTGROUP

COOLING PASSIVE

COOLING A

VXV POOL

SWEDISH

SYSTEM

HEAT SOURCE

HEATING SYSTEM

COOLING

POOL

SHUNTGROUP

ADD. HEAT

SERVICETIME

FACTORY SET

RESET OPERAT. TIME

CALIBRATION SENSOR

LOGTIME

BRINETIME ON

BRINETIME OFF

TOPH.TIME

TOPH.TIME D

DEFROST

DEFR CURVE 0

DEFR CURVE -XX

DEFR TEMPERATURE

STOP DEFR

UNDER 5°C DEFR

MIN TIME DEFROST

DEFROST SENSOR

VMBMA202 53

Sub menu SERVICE -> HOT WATER

Used to change the settings for hot water production.

Menu selection

START

HOT WATER TIME

HEATING TIME

TOPH. INTERVAL

TOPH. STOP

Meaning

Start temperature for hot water production. Shows the actual hot water temperature and the value within brackets indicates the start temperature.

(OFF = no sensor alarm)

Time for hot water production during combined hot water and heating demand, in minutes.

Factory setting

40°C (at OUTSIDE AIR temperature of 38°C)

(interval: OFF, 30°C / 55°C)

40M (up to 8kW)

20M (10kW and more)

(interval: 5M / 40M)

20M (interval: 5M / 40M) Time for hot water production during combined heating and hot water demand, in minutes.

Time interval between peak heating charging, legionella function, in days.

Stop temperature for peak heating charging (applies to VL system).

7D

(interval: OFF, 1D / 90D)

60°C

(interval: 50°C / 65°C)

Sub menu SERVICE -> HEATPUMP

Used to change the heat pump’s operating settings.

Menu selection

INTEGRAL A1

HYSTERESIS

MAX RETURN

STARTINTERVAL

ALARM BRINE

PRESSURE PIPE

OUTDOOR STOP

SHUNT COOLING

(Expansion card)

Meaning

The integral’s value for starting the heat pump. See figure 6 for further information.

If the difference between the actual supply temperature and the calculated supply temperature is too great either the integral value is set to start value A1 (the heat pump starts) or the value is set to 0 (stops the heat pump).

Stop temperature at high return from the heating system.

Minimum tine interval between two heat pump starts in minutes.

Not shown if OUTSIDE AIR is selected as heat source. Alarm temperature for supply brine

(brine out), which stops the heat pump. (OFF = no sensor alarm)

Sensor on the compressor’s hot gas line. Value within brackets indicates maximum permitted temperature. If this value is exceeded, the compressor will stop and start again as soon as the temperature has dropped. No alarm shown in the display, however, a square is shown in the left, lower corner of the display.

Only appears if OUTSIDE AIR is selected. Lowest outdoor temperature when the outdoor sensor stops the compressor and heating or hot water is instead produced with the auxiliary heater.

Set point value for cooling. Desired temperature for supply line.

Factory setting

60 (interval: 5 / 300)

10°C (at OUTSIDE AIR temperature of 12°C)

(interval: 1°C / 15°C)

55°C

(interval: 30°C / 70°C)

20M

(interval: 10M / 30M)

OFF (interval: OFF, -14°C -

10°C)

130°C

(interval: 100°C / 160°C)

-20°C

(interval: -20°C / -1°C)

18°C (interval: 0°C / 30°C)

Sub menu SERVICE -> ADD. HEAT

Used to change the heat pump stage’s operating settings.

Menu selection

INTEGRAL A2

HYSTERESIS

MAXSTEP

Meaning

Two conditions must be fulfilled in order to start the auxiliary heater: the integral’s value to start must be less than integral A1 + A2, and the supply temperature must be 2° lower than the calculated temperature. See figure 6 for further information.

If the difference between the actual supply temperature and the calculated supply temperature is too great (see figure 7), either the integral value is set to start value A1 + A2 (the auxiliary heater starts) or the value is set to 0 (stops the auxiliary heater ).

Maximum number of permitted steps for auxiliary heating.

0 = no auxiliary heating permitted (Means that only AUTO or OFF can be selected.)

Refers to main fuse in the unit, in amperes.

Factory setting

600 (interval: 50 / 990)

20°C (interval: 5°C / 30°C)

2 (at OUTSIDE AIR 5)

(interval: OFF, 1 / 3)

(interval at OUTDSIDE AIR:

OFF, 1 / 5)

20 (interval: 16 / 35) MAX CURRENT

(Expansion card)

SHUNTTIME

HOT WATER STOP

Minimum time interval between signals to shunt motor to affect the supply temperature, in seconds. Applies to all connected shunt groups (applies to system D or VLD).

60S (interval: 10S / 99S)

Stop temperature for hot water during ADD. HEAT operation (applies to system VL system). 60°C

(interval: 50°C / 65°C)

54 VMBMA202

Sub menu SERVICE -> MANUAL TEST

Used to manually test and test operate the heat pump’s components or signal outputs.

Menu selection

MANUAL TEST

HEATPUMP

BRINEPUMP

CIRC: PUMP

VXV HOT WATER

SHUNT 1

ADD. HEAT 1

ADD. HEAT 2

ADD. HEAT 3 ( DHP-A, -AL )

(Defrost card)

SHUNT DEFR ( DHP-A, -AL )

(Defrost card)

FAN L

(Defrost card)

FAN H

(Defrost card)

ADD.HEAT EXT ( DHP-A, -AL )

(Defrost card)

ALARM

(Expansion card)

SHUNT COOLING

(Expansion card)

SHUNTGROUP

(Expansion card)

COOLING PASSIVE

(Expansion card)

COOLING ACTIVE

(Expansion card)

VXV POOL

(Expansion card)

Meaning

Setting options for manual test.

0 = deactivate manual test

1 = activate manual test

2 = activate manual test with option of navigating from the SERVICE menu to check that the temperatures rise.

0 = stop heat pump, does not stop started brine pump

1 = start heat pump, also starts brine pump.

NOTE! The heat pump cannot be started in the event of an active alarm.

0 = stop brine pump

1 = start brine pump

0 = stop circulation pump

1 = start circulation pump

0 = heating mode for 3-way valve

1 = hot water mode for 3-way valve

- = closes shunt (applies to D-system)

0 = shunt unaffected

+ = opens shunt (applies to D-system)

0 = stop auxiliary heat step 1

1 = start auxiliary heat step 1

0 = stop auxiliary heat step 2

1 = start auxiliary heat step 2

0 = stop auxiliary heat step 3

1 = start auxiliary heat step 3

- = opens flow from the defrost tank

0 = shunt unaffected

+ = closes the flow from the defrost tank

0 = stop fan

1 = start fan with low speed

0 = stop fan

1 = start fan with high speed

0 = 0V on terminal block 283

1 = control voltage 230V on terminal block 283

0 = stop signal on output External alarm

1 = start signal on output External alarm

- = shuts shunt

0 = shunt unaffected

+ = opens shunt

- = shuts shunt

0 = shunt unaffected

+ = opens shunt

0 = stop passive cooling

1 = start passive cooling (brine pump starts and shunt cooling regulates to set point value)

0 = stop active cooling

1 = start active cooling (brine pump and compressor starts, shunt cooling regulates to set point value)

0 = normal mode for exchange valve

1 = pool mode for exchange valve

Factory setting

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

VMBMA202 55

Sub menu SERVICE -> INSTALLATION

Used for settings that are set during installation

Menu selection

SWEDISH

SYSTEM

NOTE! The menu selection in the SYSTEM menu varies depending on the selected values. Tip: start in the top menu and work downwards.

Meaning

Language setting for the control computer.

Factory setting

SWEDISH

(SVENSKA

NORSK,

SUOMI,

DEUTSCH,

NEDERLANDS,

ENGLISH,

FRANCAIS

POLSKI

DANSK)

Sub menu SERVICE -> INSTALLATION -> SYSTEM:

Menu selection

HEAT SOURCE

HEATING SYSTEM

COOLING

(Expansion card)

Meaning

GROUND OR ROCK

OUTSIDE AIR (Defrost card)

VL-SYSTEM

D-SYSTEM

VLD-SYSTEM (appears if OUTSIDE AIR is selected)

COOLING PASSIVE: OFF/EXTERNAL/INTEGRATED IN HP

COOLING ACTIVE: OFF/EXTERNAL

ROOM SENSOR: 0/1 (Appears if room sensor is installed)

(0=controls to a constant value, 1=controls to the value that the room sensor has)

ON/OFF POOL

(Expansion card)

SHUNTGROUP

(Expansion card)

ADD. HEAT

ON/OFF

When ON, HEAT CURVE 2 is activated in the INFORMATION menu.

CONTROLLED CP: only OFF

0-10V: OFF / EXTERNAL ADDITIONAL HEATER (Expansion card)

FLOW SENSOR: ON/OFF

CURRENT LIMITER: ON/OFF(Expansion card)

PHASE FAULT: OFF / PHASE READING

SERVICETIME

FACTORY SET

RESET OPERAT. TIME

CALIBRATION SENSOR

NOTE!

Only used for test operation. Simulates time 60 times as fast, which means that the waiting times are eliminated during test operation.

0 = deactivates SERVICETIME

1 = activates SERVICETIME which speeds up the control computer’s integral calculation and start delay by 60 times.

0 = starting point, the value returns to zero after a change

R = reset factory settings for radiator system

G = rest factory settings for under floor heating

0 = no reset of operation times

1 = reset operation times to zero

Following sensors are in the installation:

OUTDOOR

Supply line

Return line

HOT WATER

BRINE OUT

BRINE IN

DEFR SENSOR

EXTERNAL INFLUENCE (these parameters affect all sensors except the outdoor sensor. The parameter compensates for the external influence on the sensor that is mounted in the heat pump.

-

-

-

0 (interval: -5°C / 5°C)

0 (interval: -5°C / 5°C)

0 (interval: -5°C / 5°C)

0 (interval: -5°C / 5°C)

0 (interval: -5°C / 5°C)

0 (interval: -5°C / 5°C)

-5°C (interval: -5°C / 5°C)

5

(interval: 0 / 20)

LOGTIME

BRINETIME ON

BRINETIME OFF

Time interval between collection points of temperature history in minutes. The history graphs always show the 60 last collection points, which means that the graphs can display history from 1 hour up to 60 hours ago.

(The function is not active if there is an active alarm).

Switch on delay for compressor, in seconds.

Switch off delay for brine pump, in seconds.

1M (interval: 1M / 60M)

30S (at internal passive cooling 90S)

(interval: 10S / 90S)

30S (interval: 10S / 60S)

56 VMBMA202

Menu selection

TOPH. TIME

TOPH.TIME D

Meaning

OFF = Deactivates time period for peak heating charging (applies to system D).

ON = Activates time period for peak heating charging (applies to system D).

Factory setting

OFF

Time period to maintain peak heating charging temperature in hours (applies to system D). 1H (interval: 1H / 10H)

Sub menu SERVICE -> DEFROST ( DHP-A, -AL )

The menu applies to DHP-A, -AL with defroster card and only appears if OUTDOOR AIR in the SERVICE -> INSTALLATION -> SYSTEM -> HEAT

SOURCE menus is selected. Used to change settings for outdoor unit defrost.

Menu selection

DEFR CURVE 0

DEFR CURVE [value for

OUTDOOR STOP]

DEFR TEMPERATURE

STOP DEFR

UNDER 5°C DEFR

MIN TIME DEFROST

DEFR SENSOR

Meaning

The temperature of the brine return line at which defrosting should start, at 0°C outdoor temperature is set here, using + or -.

The graph can be changed up or down at 0°C outdoor temperature in the display.

The temperature of the brine return line at which defrosting should start, at the set outdoor temperature for OUTDOOR STOP is set here, using + or -.

The setting is made by reducing the OUTDOOR STOP value by this value.

The number of degrees shown after DEFR CURVE in the display is the set value for

OUTDOOR STOP. The combined temperature is shown in the top right corner of the display.

The graph can be changed up or down at the outdoor temperature OUTDOOR STOP in the display.

The temperature shunted to the outdoor unit during a defrost.

The temperature that must be reached in the Brine In sensor to complete a defrost.

Safety defrosting occurs when the outdoor temperature has been below 5° for a set number of days, shunts +20°C for 10 minutes.

Minimum time between two defrosts in minutes.

Shows the actual temperature of the incoming air to the outdoor unit.

Factory setting

-10°C

(interval: -15°C / -5°C)

EXTERIOR STOP reduced by 4°C

(interval: -8°C / -1°C)

15°C

(interval: 14°C / 20°C)

11°C (interval: 7°C / 12°C)

-

7D

(interval: OFF, 1D / 14D)

45M

(interval: 10M / 60M)

VMBMA202 57

15 Operating conditions

If there is a demand for both heat production and hot water production, it switches between heating and hot water according to the seat time for HEATING TIME and HOT WATER TIME.

15.1 Starting heat production

Heat pump (compressor)

1. The integral value is less than or equivalent to what is set in INTEGRAL A1 and

2. at least 5 minutes have passed since the heat pump stopped and

3. the time since the previous start, set to START INTERVAL, has run out and

4. the operating pressure switch is closed (=1) and

5. if HEAT-STOP stops and

6. if OUTDOOR STOP stops and

7. if the brine temperature is greater than the activated ALARM BRINE (factory setting: OFF) or

8. if the set value for HYSTERESIS is reached the integral value is forced to the value for INTEGRAL A1, which fulfils point 1.

Auxiliary heat

9. The integral value is less than or equivalent to the sum of INTEGRAL A1 + INTEGRAL A2 and

10. the actual temperature on the supply line is at least 3°C lower than the calculated supply temperature or

11. if the set value for HYSTERESIS is reached the integral value is forced to the value for INTEGRAL A1 + INTEGRAL A2, which fulfils point 9.

Auxiliary heater step 4 (12 kW) and 5 (15 kW) are only activated when the temperature is -21°C or colder. These two steps are never activated when the compressor is in operation. (Only applies to DHP-A, -AL).

15.2 Stopping heat production

Heat pump (compressor)

1. The integral value is greater or equivalent to 0°min (degree minutes) or

2. the return temperature is greater than, or the same as, the set maximum return temperature or

3. when the operating pressure switch has been open (=0) for more than 5 seconds or

4. if the pressure pipe sensor has reached its maximum permitted temperature or

5. if the outdoor temperature is greater or the same as HEAT-STOP or

6. if the outdoor temperature is lower than or the same as OUTDOOR STOP or

7. if the brine temperature is lower than or the same as the activated ALARM BRINE (factory setting: OFF) or

8. if the set value for HYSTERESIS is reached the integral value is forced to 0°min, which fulfils point 1.

9. If defrosting starts, the compressor stops and remains inactive during the defrosting period (Only applies to DHP-A, -AL).

Auxiliary heat

10. The integral value is greater than the set value for INTEGRAL A1 or

11. the actual temperature on the supply line is 2°C greater than the calculated supply temperature.

15.3 Starting hot water production

Heat pump (compressor)

1. The hot water temperature is less than or the same as the set value for START or

2. hot water temperature within 2°C from the set start value for hot water production at end of heating production and

3. no active alarms that block hot water production.

Auxiliary heat

4. If OUTDOOR STOP is activated, the compressor stops automatically when the outdoor temperature is lower than or the same as the set value, the hot water is then produced by the auxiliary heater.

The auxiliary heater is not normally used to produce hot water but the following exceptions apply for the VL system:

• The auxiliary heater is in operation at the same time as the compressor when hot water production was started.

• Operating mode ADD. HEAT is selected.

• Peak heating charging (legionella function). The auxiliary heater connects 2 minutes after hot water production is started if ADD. HEAT mode is not selected, peak heating charging is not delayed.

15.4 Stopping hot water production

Heat pump (compressor)

1. When the operating pressure switch has been open (=0) for more than 5 seconds (40 seconds for the first two minutes after start of hot water production) or

2. if the pressure pipe sensor has reached its maximum permitted temperature or

3. the maximum time of 45 minutes has run out, after this time the heating demand is checked for 5 minutes.

58 VMBMA202

Auxiliary heat

For VL systems stop occurs when:

4. operating mode ADD. HEAT is selected and the temperature is the same as the value set for HOT WATER STOP or

5. when AUTO or HOT WATER is selected and the temperature is the same as the set value for HOT WATER STOP and the auxiliary heater produces hot water in cases when OUTDOOR STOP stops or

6. the set value for TOPH.STOP is reached during peak heating charging (legionella function).

VMBMA202 59

16 Troubleshooting

16.1 Alarm list

Shown in display in the event of an alarm. To reset alarms 1-5, set the operating mode to OFF or cut the power supply.

Message

HIGHPRESS ERROR

LOWPRESS ERROR

MOTOR P ERROR

BRINE OUT

BRINEFLOW LOW

ADD. HEAT

SENSOR OUTDOOR

SENSOR FRONT

SENSOR RETURN

SENSOR HOT WATER

SENSOR DEFROST

MS FAN

SENSOR COOLING

Meaning

Tripped high pressure switch. Compressor stopped. No hot water production.

Tripped low pressure switch. Compressor stopped. No hot water production.

Deployed motor protection (Over current relay compressor). Compressor stopped. No hot water production.

Brine supply does not exceed set temperature. Compressor stopped. No hot water production. Not normally activated.

Flow sensor not active during last start. Compressor stopped. No hot water production.

Overheating protection deployed. No auxiliary heating active.

Fault in outside sensor. Zero degrees used for calculations.

Incorrect supply line sensor. Everything stops except circulation pump.

Return sensor fault. Return temperature = Supply line – 5 is used. Calculated supply temperature limited to maximum 45°C.

Fault on sensor for start temperature. No hot water production.

Defrost sensor fault. Heat and hot water production is controlled from the outdoor sensor’s value instead. (Applies to DHP-A, -AL)

Deployed motor protection for outdoor unit fan. Compressor stopped. No hot water production.

(Applies to DHP-A, -AL)

Sensor fault. Cooling function stops.

16.2 Measurement points

Conversion table for sensors

NOTE! When reading the resistance of the sensors, the sensor leads must first be disconnected from the control equipment.

Outdoor sensor

°C kiloohm

30

35

40

10

15

20

25

0

5

-10

-5

-30

-25

-20

-15

276

224

183

150

124

103

86

681

538

428

343

1884

1443

1115

868

Other sensors

°C kiloohm

60

65

70

75

40

45

50

55

80

85

90

95

20

25

30

35

0

5

10

15

6.0

5.0

4.2

3.7

12.2

10.1

8.5

7.1

3.1

2.7

2.3

2.0

27.1

22.0

18.0

14.8

66.3

52.4

41.8

33.5

1. First measure the sensor including the cable.

2. Then measure the sensor only.

60 VMBMA202

16.3 Check points

Temperatures

Name

Condensing temperature

Evaporation temperature

Overheating

Radiator circuit

Brine circuit

Overheating R407C

Expansion valve factory setting

Name

Danfoss TUBE R404A, 4.2 kW

Danfoss TUBE R404A, 5.6 kW

Danfoss TUBE R404A, 8.4 kW

Danfoss TUBE R404A, 12.0 kW

Danfoss TUBE R404A, 15.3 kW

Danfoss TUBE R407C, 11.0 kW

Danfoss TUBE R407C, 17.0 kW

Break pressure pressure switches

Refrigerant

R134a

(Only applies for certain models of

DHP-C)

R404A

(Only applies to

DHP-A, -AL)

R407C

Pressostat

Low pressure switch

Operating pressostat

High pressure switch

Low pressure switch

Operating pressure switch A

Operating pressure switch B

High pressure switch

Low pressure switch

Operating pressure switch A

Operating pressure switch B

High pressure switch

Values

0.5 – 1.5 °C above supply line temperature

7 - 8 °C lower than incoming brine

4 - 8 K temperature difference

5 - 10 K temperature difference

2 - 5 K temperature difference

4K ±1 K

Setting

From fully closed position, screw 3 turns out

From fully closed position, screw 5.5 turns out

From fully closed position, screw 5 turns out

From fully closed position, screw 5.25 turns out

From fully closed position, screw 2.75 turns out

From fully closed position, screw 6.25 turns out

From fully closed position, screw 5.5 turns out

Break pressure

0.03 MPa

1.80 MPa

2.45 MPa

0.08 MPa

2.65 MPa

2.85 MPa

3.10 MPa

0.08 MPa

2.65 MPa

2.85 MPa

3.10 MPa

VMBMA202 61

16.4 Operational problems

ALARM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Problem – Alarm LP (low pressure pressure switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Problem – Alarm HP (high pressure pressure switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Problem – Alarm MS (motor protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Problem – Alarm sensor (all) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Problem – Incorrect phase sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Problem – Alarm TS (addition) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Problem – Alarm Brine out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Problem – Alarm Brine flow low. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Problem – Operating pressure switch open alternatively high hot gas temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

LEAKAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Problem – Leak fluid side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

NOISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Problem – Noise problem in the radiator system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Problem – Loud compressor noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Problem – Shrieking whistling noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Problem – Noise – miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

HOT WATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Problem – Temperature and/or quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

HEATING COMFORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Problem – Too cold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Problem – Too hot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Problem – The heat pump runs and runs but never stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Problem – Runs on electric heating element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Problem – The auxiliary heater is in operation but not the compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Problem – The heat pump consumes too much energy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Problem – Auxiliary heater cuts in too soon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Problem – Short operating times despite heating demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Problem – Connection of external AH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

OUTDOOR UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Problem – Noise/loud noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Problem – Defrosting problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Problem – Build-up of ice under and around the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Problem – Water run-off by the outdoor unit, risk of moisture problems in house foundations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

ALARM

Problem – Alarm LP (low pressure pressure switch)

Cause

1. Blocked strainer on the brine circuit.

2. Air in the brine circuit.

3. Closed taps, main tap or filler cock on the brine circuit.

4. The circulation pump for the brine circuit is defective or has jammed.

Troubleshooting

Check that the strainer is not blocked.

Remedy

Clean the strainer if necessary.

Listen for air in the heat pump and brine circuit.

Bleed the brine circuit according to the installation instructions.

Check that the shut-off cock/any other taps are open. Open closed taps.

5. Cable break or loose cable to low pressure pressure switch.

Check:

• That the circulation pump spins.

• That the shut-off valves are open.

• That the strainer is not blocked.

• That no air is in the heating system.

The circulation pump may have jammed, if so, open the bleed screw and try to release the paddle wheel using a screwdriver for example.

Open closed valves or taps.

Check, and, if necessary, clean the strainer.

If necessary, bleed the heating system according to the installation instructions

If a cable has come loose, connect it. • Check that both cables are connected on the pressure switch.

• Using the buzzer, check that there are no cable breaks. In order to do this, disconnect the cables from the pressure switch and circuit board.

If there is a cable break, replace the cable.

62 VMBMA202

Cause

6. The low pressure pressure switch opens too soon.

7. Incorrect type of anti-freeze, must be in accordance with instructions.

8. Incorrect mix of anti-freeze, the concentration must be in accordance with instructions.

9. Short active collector, e.g. short or dry bore hole, short surface soil collector.

10. Collector too long, pressure drop too great.

11. Expansion valve defective or incorrectly set.

12. Lack of refrigerant, not enough refrigerant in the system.

13. Drying filter blockage.

14. Blocked evaporator on the water side.

15. Blocked evaporator on the refrigerant side.

Troubleshooting

• Incorrect pressure switch installed. Higher break pressure than intended. See marking.

• Pressure switch fault, opens at a higher pressure than indicated (mark pressure). Check using the manometer apparatus.

• Defective pressure switch, always open.

Check that the correct type of anti-freeze is used.

Check the freezing point of the mix using a refractometer.

Remedy

If the low pressure pressure switch opens too soon or is always open, replace it.

If the incorrect type of anti-freeze is used, the entire system must be drained and refilled with a new mixture.

If the mixture is not in accordance with the instructions, it must be remixed in an external container. This is because the fluids do not mix with each other well if one is filled directly into the system.

If the active collector is too short, the heat pump cannot receive enough energy from the heat source , which results in it requiring an addition to cover the energy requirement.

• Check the length of the collector that is being used and compare with the collector length in the dimensioning documentation.

• In addition, check that the collector is not suspended

”in free air” if boreholes are used.

Check the length of the collector that is being used and that it is connected in parallel (not connected in series) if more than 1 coil is being used.

Using manometer apparatus and thermometer check what the overheating reading of the unit is.

Also check that bulb and capillary tube are undamaged and that the bulb is correctly installed.

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

If a longer collector is being used than recommended for the specific heat pump, it must be divided on several parallel connected coils.

If the overheating reading does not correspond with the instructions for the specific refrigerant, adjust the expansion valve until the correct value is obtained. See separate instructions for cooling techniques.

If overheating cannot be adjusted with the expansion valve or if the capillary tube/bulb is damaged, replace it.

Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.

If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action.

If the drying filter is blocked, replace it.

Check the temperature difference above the drying filter. A one degree difference is permissible. If the difference is greater than 1 degree, the filter is blocked.

Take a reading during operation.

If there is no strainer in the brine circuit, there is a risk of dirt sticking in the evaporator and blocking it.

Unfortunately there is no easy way of checking if the evaporator is blocked.

You can carry out a test by allowing the compressor and circulation pumps to remain in operation. Check that the circulation pumps work (for circ.pumps with a venting screw, unscrew it and feel if the pump rotor rotates using a screwdriver).

Then read the temperature on both connection pipes to the evaporator:

If the temperature difference is <1°C, the evaporator is probably blocked.

If the temperature difference is 2-6°C, it is probably not blocked.

If the temperature difference is >6°C, the evaporator is probably blocked.

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

If the evaporator is thought to be blocked, try flushing it. If this does not work, it must be replaced

If the evaporator is thought to be blocked by oil for example, try blowing nitrogen through it to release the oil. If this does not work, it must be replaced

VMBMA202 63

Problem – Alarm HP (high pressure pressure switch)

Cause

1. Blocked strainer in the heating system.

2. Air in the heating system.

3. Closed or partially closed thermostats/valves in the heating system.

4. The circulation pump that is defective or has jammed.

Troubleshooting

Check that the strainer is not blocked.

Listen for air in the heat pump and heating system. Bleed the heating system circuit according to the installation instructions.

Check that the thermostats/valves in the heating system are open.

Open closed thermostats/valves.

Is there voltage to the circulation pump?

Remedy

Clean the strainer if necessary.

In the control computer’s manual test menu check that the circulation pump is active.

Check if there is voltage to the circulation pump, if there is, and it does not run, the circulation pump is jammed. If this is the case, open the bleed screw and try to release the paddle wheel using a screwdriver for example (Does not apply to heat pumps in the Optimum series).

If there is no voltage to the circulation pump, check if there is voltage from the control computer, see wiring diagram. If there is voltage from the control computer, check the components between the control computer and circulation pump.

If a component is defective, replace it.

Open closed main tap.

If a cable has come loose, connect it.

5. Shut-off main tap in heating system.

6. Cable break or loose cable to high pressure pressure switch.

Check that the main tap is open.

• Check that both cables are connected on the pressure switch.

• Using the buzzer, check that there are no cable breaks. In order to do this, disconnect the cables from the pressure switch and circuit board.

7. The operating pressure switch does not open. • Incorrect pressure switch installed. Same or higher break pressure than high pressure pressure switch.

See marking.

If there is a cable break, replace the cable.

If the operating pressure switch does not open, replace it.

8. The high pressure pressure switch opens too soon.

9. External system shunt that closes on time setting.

10. Incorrectly facing non-return valve with too high opening pressure.

• Pressure switch fault, opens at a higher pressure than indicated (mark pressure). Check using the manometer apparatus.

• Defective pressure switch, never opens.

• Incorrect pressure switch installed. As low or lower break pressure than operating pressure switch. See marking.

• Pressure switch fault, opens at a lower pressure than indicated (mark pressure). Check using the manometer apparatus.

• Defective pressure switch, always open.

Check for shunts or valves in the system, which are timer-controlled, that close down the entire or too large a part of the heating system.

• Check the system’s direction of flow and that the non-return valve is turned the correct way.

• Check that the heat pump’s external available pressure exceeds the non-return valve’s opening pressure.

If the high pressure pressure switch opens too soon or is always open, replace it.

Always ensure that there is a sufficiently large water volume for the heat pump to work against, i.e. for the heat to give off its heat to.

If the non-return valve is facing the wrong way, turn it.

11. Large pressure drop in the heating system. • Dirt in the heating system.

• Closed or partially closed thermostats/valves in the heating system.

• Under dimensioned pipe system. Check that the

HP’s external available pressure exceeds the system pressure drop.

If the non-return valve has too great an opening pressure, replace it.

If necessary, clean/flush the heating system.

Open closed thermostats/valves.

If there is not sufficient pressure equipment, the heating system can be adjusted according to the system solution for large pressure drop.

64 VMBMA202

Cause

12. Overfilled refrigerant circuit.

13. Blocked condenser on the water side.

14. Blocked condenser on the refrigerant side.

Troubleshooting

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

Remedy

Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.

If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action.

If the condenser is thought to be blocked, try flushing it. If this does not work, it must be replaced

If there is no strainer in the heating system, there is a risk of dirt sticking in the condenser and blocking it.

Unfortunately there is no easy way of checking if the condenser is blocked.

You can carry out a test by allowing the compressor and circulation pumps to remain in operation and after a while, check that the delivery pipe becomes hot and that the circulation pumps work (for circ.

pumps with a venting screw, unscrew it and feel if the pump rotor rotates using a screwdriver).

Then read the temperature on both connection pipes to the condenser:

If the temperature difference is <3°C, the condenser is probably blocked.

If the temperature difference is 3-13°C, it is probably not blocked.

If the temperature difference is >13°C, the condenser is probably blocked.

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

If the condenser is thought to be blocked by oil for example, try blowing nitrogen through it to release the oil. If this does not work, it must be replaced

Problem – Alarm MS (motor protection)

Cause Troubleshooting

1. Phase drop or blown fuse.

2. Defective soft-starter.

3. Defective contactor.

Check that all phases are present on the terminal block for incoming supply. If not, check the fuses in the cabinet.

Also check that all wiring is secure, if screw terminals are used they must be properly tightened, if phoenix flat spring terminals are used, the cables must be secure in the correct hole with load on the cable.

Measurement check and establish that when the control computer gives a signal (there must be voltage between A1 & A2 on the soft-starter), the soft-starter releases all three phases down to the compressor.

Measurement check and establish that when the control computer gives a signal (there must be voltage between A1 & A2 on the contactor), the contactor releases all three phases down to the compressor.

4. Defective or incorrectly set motor protection. Use a hook-on meter to establish when the motor protection deploys, check what the motor protection is set to. Compare with the table.

5. Cable break. Check the supply to the motor protection//softstarter/compressor.

6. Defective compressor. Measurement check the three phases (each to zero) at the compressor. Deviations from the average of the three values must not be more than 12% on any of the phases. If measurement checking the winding’s impedance the same value must be on all three windings.

Remedy

If any of the phases are not present, check backwards towards the building’s main electrical cabinet. If there are no phases there, contact the network supplier.

If the soft-starter does not release the phases when it receives signals from the control computer, replace it.

If the contactor does not release the phases when it receives signals from the control computer, replace it.

If the motor protection is defective, replace it.

If incorrectly set, adjust to the correct value.

If a cable is damaged, replace it.

If the compressor is defective, replace it.

VMBMA202 65

Problem – Alarm sensor (all)

Cause

Sensor fault alternatively cable fault.

Troubleshooting

• When reading the resistance of the sensors, the sensor leads must first be disconnected from the control equipment or terminal block.

• First take a reading from the sensor including cable and check against the ohm table in the Measurement points section.

• If the read off value does not correspond with the table, only measure the sensor and check the ohm table in the Measurement points section.

Remedy

If the sensor gives a correct value, the cable is defective.

If the sensor does not give a correct value, the sensor is defective.

Problem – Incorrect phase sequence

Cause

The incoming phases have the incorrect sequence (only applies to 3-phase heat pumps).

Troubleshooting

• If the text ERR PHASE SEQ appears in the display when the heat pump is powered, (only appears in the first 10 minutes) this means that the phases have the incorrect sequence.

• When the compressor is running, check the delivery pipe temperature by feeling the delivery pipe that should be hot (not just warm) even a little distance from the compressor if the phases are correctly sequenced.

• When the compressor runs with the phases incorrectly sequenced a strange noise may be heard (loud, rattling) when the compressor runs backwards.

Remedy

If the phases are in the incorrect order, switch two incoming phases at the main terminal block and recheck according to the troubleshooting window.

Problem – Alarm TS (addition)

Cause

1. The overheating protection has tripped.

Troubleshooting

Check if the overheating protection has tripped.

2. Phase drop.

The alarm occurs when 230 V is not registered between incoming L2 on the circuit board and zero on block 220.

• Check if the overheating protection has tripped.

• Check if any cables at the circuit board or overheating protection are loose or damaged.

3. Overheating protection fault, cannot be reset. Press the reset button, measurement check for 230 V on the incoming and outgoing connections.

4. Flow sensor fault. Check what the flow sensor shows, is it a plausible/ actual value?

5. No or insufficient circulation in the heating system.

Measure the resistance of the sensor, check against the ohm table in the Measurement points section.

• That the strainer is not blocked.

• That no air is in the heating system.

6. The submersible tube in the electric heating element is against the coils.

Check what the flow temperature is when the overheating protection trips. It normally trips at about

95°C.

Remedy

If the overheating protection has tripped, reset it.

If the overheating protection has tripped, reset it.

If the cables are loose/damaged, secure or replace them.

If the overheating protection is defective, replace it.

If the sensor is defective, replace it.

The circulation pump may have jammed, if so, open the bleed screw and try to release the paddle wheel using a screwdriver for example.

Open closed valves or taps.

Check, and, if necessary, clean the strainer.

If necessary, bleed the heating system according to the installation instructions.

The submersible tube can be prised out slightly from the coils using a screwdriver or similar. The submersible tube must be vertical.

Problem – Alarm Brine out

66 VMBMA202

Cause

1. Defective sensor.

2. Brine temperature too low.

Troubleshooting

Check what the sensor shows, is it a plausible/actual value?

Measure the resistance of the sensor, check against the ohm table in the Measurement points section.

Remedy

If the sensor is defective, replace it.

Check the set value on ALARM BRINE in the heat pump’s control computer.

The alarm is triggered when the temperature on BRINE OUT is as low or lower than the set value on ALARM BRINE. In the factory setting this function is inactive.

Problem – Alarm Brine flow low

Cause

1. Incorrect system selected in the control computer.

If the system does not contain a flow switch but the control computer is set for the system with flow switch, this alarm occurs.

2. Insufficient flow.

Troubleshooting

In the menu SYSTEM, check which is selected.

Remedy

If the incorrect system is selected , change it.

• Check whether the ground water pump is running?

• Check the flow switch.

• Calibration/setting the flow switch.

• Blocked exchanger?

The ground water pump must start and run together with the heat pump’s integrated brine pump.

Check against the wiring diagram that the flow switch is correctly connected.

Check that the flow switch is set for the correct working range according to the flow switch instructions.

If the exchanger is blocked, clean or replace it.

VMBMA202 67

Problem – Operating pressure switch open alternatively high hot gas temperature

(indicated by med  in the display’s lower left corner)

Cause

1. The operating pressure switch does not close again.

2. Sensor fault, shows >120°C

3. Hot gas temperature too high.

4. Overheating too high.

5. Lack of refrigerant, not enough refrigerant in the system.

Troubleshooting

1. Switch off the main switch for the heat pump, wait until the compressor has been stationary for at least 15 minutes.

2. Disconnect the two cables on the pressure switch, using a buzzer check if the pressure switch is closed.

Remedy

If the pressure switch is closed, bridge the pressure switch cables temporarily and switch on the current to the heat pump again. If there is an indication  in the display this means that the pressure switch is fault-free and the problem is in the wiring or in the circuit board.

If the pressure switch is open, try carefully tapping the head of the pressure switch with a screwdriver and using the buzzer test to see if it has closed again.

Replace the pressure switch if it appears to jam repeatedly.

If the sensor is defective, replace it.

Check what the sensor shows, is it a plausible/ actual value?

Measure the resistance of the sensor, check against the ohm table in the Measurement points section.

Check the set value on DELIVERY PIPE in the heat pump’s control computer (factory setting 120°C)

Using manometer apparatus and thermometer check what the overheating reading of the unit is.

Also check that bulb and capillary tube are undamaged and that the bulb is correctly installed.

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

The symbol appears when the delivery pipe temperature is as high or greater than the set value for DELIVERY PIPE.

If the overheating reading does not correspond with the instructions for the specific refrigerant, adjust the expansion valve until the correct value is obtained. See separate instructions for cooling techniques.

If overheating cannot be adjusted with the expansion valve or if the capillary tube/bulb is damaged, replace it.

Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.

If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action. If leak tracer is not available, brush soap water on the suspected leak and look for bubbles. Also check for oil as this can come out from the refrigerant circuit.

LEAKAGE

Problem – Leak fluid side

Cause

1. Insufficiently tightened connections.

Troubleshooting

Locate the leak.

2. Cracked nut or connection.

3. Defective gasket or O-ring.

4. There is no overflow pipe connected to the safety valve(s).

5. Filler valve between incoming cold water and heating system not closed or leaking.

Locate the leak.

Locate the leak.

Establish which safety valve does not have an overflow pipe.

Check whether water continuously leaks from the safety valve on the expansion vessel on the hot side.

Remedy

• Tighten the connection and check that it is sealed

• If it is still not sealed, replace the entire connection and support sleeve (only at soft pipes)

Replace nut or connection.

Replace the gasket or O-ring.

Install an overflow pipe according to the applicable norms.

Try closing the filler valve and see if water stops dripping from the safety valve, if not, replace the filler valve.

68 VMBMA202

Cause

6. No condensation drain to heat pump’s drip tray.

7. Lack of condensation insulation on cold water pipe and/or brine pipe.

8. Leak at soldered joints.

9. Leak at the condenser’s drain cock.

10. Leak at the condenser’s bleed valve.

11. Leak at soldered joint on water heater.

12. Associated leak on the water heater.

13. Associated leakage in the condenser.

14. Anti-freeze is forced out of the safety valve on the expansion tank (brine system).

Troubleshooting

Check that condensation drain is installed and correctly connected.

Establish where the condensation is coming from.

Locate the leak.

Remedy

Install the condensation drain that runs out into the floor drain.

The brine pipe must always be insulated. In the event of problems with condensation on the cold water pipes, insulate them. Condensation often accumulates in joints and angled sections of the insulation. Improve the insulation.

Drain the system of fluid, repair the leak. If the leak is on the connection pipe to the heat exchanger, also drain the refrigerant side.

If the sealed cover is not sealed, replace the sealed cover or the entire drain tap.

1. Check that the valve is completely closed.

2. Check that the sealed cover is sealed.

Check that it is completely closed.

Locate the leak.

• Establish whether water continuously leaks from the safety valve on the expansion vessel on the hot side.

• Establish whether water continuously leaks from the safety valve on the cold side.

• Check for lack of refrigerant in the unit.

• Check by smelling by safety valve on the hot side, open the valve and check.

During the winter, water surrounding the hoses in the borehole can freeze. In some cases, the ice can push against the hoses slightly. Due to the reduction in volume in the hose, the anti-freeze fills the expansion tank and eventually forces some fluid out of the safety valve.

When the ice in the borehole melts and the hose expands and returns to its original state, a vacuum is generated which results in a reduction in tank level. As the safety valve does not let any air in, the expansion tank can retract inwards due to the vacuum created.

If it is fully closed and still leaks, replace it.

If there is a leak at the soldered joint, replace the water heater.

If the water heater has a leak, replace it.

If the condenser has a leak, replace it.

To prevent anti-freeze from being forced out from the safety valve, you can exchange the existing expansion tank for a closed pressure expansion vessel with a greater volume.

To prevent the expansion tank retracting inwards, a vacuum valve can be installed in the system.

NOISE

Problem – Noise problem in the radiator system

Cause

1. Flexible hoses missing.

2. Incorrectly installed flexible hoses.

3. Installing/suspending pipes.

4. Clicking.

5. Circulation noise (whistling noise in the heating system).

Troubleshooting

Flexible hoses must be installed according to the instructions.

Flexible hoses must be installed according to the instructions.

Check if the mountings are too rigid, right type, right sizes and/or installed too close together.

• Establish when clicking occurs, during heating and/or in connection with completed hot water production?

• Locate the clicking noises.

Check the heating system.

• Closed valves, choke valves, adjuster valves or other restrictions in the radiator system can cause circulation noise.

• Is the heating system correctly adjusted for flow?

• Too great a flow in the heating system can cause circulation noise.

Remedy

Install flexible hoses according to the instructions.

Install flexible hoses according to the instructions.

If something seems to be incorrect according to the troubleshooting window, carry out corrective actions.

A surge tank can be installed on the supply line to mix the hot water with the existing, slightly cooler, water, before it goes out to the radiators.

Try lubricating lead-ins in walls, ceilings and floors with silicone spray.

If the incorrect type of valve is used to choke the flow, replace with the correct type.

If the heating system is not correctly adjusted, make adjustments.

Can the heating system be run at a lower flow?

VMBMA202 69

Problem – Loud compressor noise

Cause

1. Phase drop.

The compressor attempts to start or operates on two phases.

2. Touching pipes – vibrations.

3. Compressor fault.

Troubleshooting

1. Check that there is 400 V between incoming phases on the heat pump.

2. If there is supply to the heat pump, measure the voltage for all electrical components all the way to the compressor, see wiring diagram.

Establish which pipe(s) is/are causing the problem.

Determine whether the compressor is unusually loud.

Remedy

Check where the phase drop is and rectify.

Try to release any tensions that cause the vibrations.

If the compressor is defective, replace it.

Problem – Shrieking whistling noise

Cause

1. Whistling expansion valve.

2. Noise from the soft-starter.

3. The compressor’s IPR valve opens.

Troubleshooting

1. Take overheating readings, adjust to the recommended value.

2. Open and close the valve fully in and out.

3. Adjust the expansion valve to recommended overheating value again.

Measurement check the input and output phases for the soft-starter as well as the control signals from the control computer, see wiring diagram.

The compressor has an integrated IPR valve that opens at 28 ±3 bar.

When the valve opens, pressure equalizes between the compressor’s high and low pressure side and a milling/whistling sound is heard.

To establish whether the valve opens at the correct pressure, connect a manometer on the high and low pressure side.

When the valve opens, this is indicated by the pressure on the low pressure side rising and reaching the pressure on the high pressure side.

Check at what pressure the valve starts to open.

Remedy

Check if the noise has stopped, if not, continue with point 2.

Continue with point 3.

If the problem persists, replace the expansion valve.

If the soft-starter is defective, replace it.

If it opens at a too low pressure, replace the compressor.

Problem – Noise – miscellaneous

Cause

1. Vibrating protective sleeves on the pressure switches.

2. Vibration noise from the electrical installation.

3. The heat pump is not level.

Troubleshooting

Establish where the vibration noise is coming from.

Check for electrical steps or similar devices screwed to the heat pump and wall. These can cause vibrations and noise.

Check that the heat pump is level by using a spirit level.

Check that the heat pump is supported by all four feet

Remedy

Prevent the protection sleeve vibrating by using insulation tape for example.

Carry out according to the installation instructions.

If the heat pump is not level, adjust using the feet.

HOT WATER

Problem – Temperature and/or quantity

Cause

1. Defective 3-way valve motor.

2. Jammed 3-way valve insert.

The valve is not secure and releases hot water to the radiators during hot water production.

Troubleshooting

Check the function of the 3-way valve, that it runs between the end positions by running a manual test.

Detach the motor and test closing and opening of the valve by pressing the control arm

Remedy

If the motor is defective, replace it.

If the insert jams, remove and clean it, or replace it.

70 VMBMA202

Cause

3. Air in TWS coil or water outer jacket.

4. Start temperature set too high for hot water production.

5. Sensor fault, hot water sensor.

Hot water production is started by the hot water sensor.

6. Large drain flow (>12l/min).

7. Water heater too small in relation to requirement.

8. The operating pressure switch opens too soon

(at too low a pressure).

Hot water production ends when the operating pressure switch opens.

9. Insufficient exchange surface to transfer the heat pump’s output to the heater.

(Only applies to heat pumps with a separate heater)

10. Heat loss in the hot water pipe.

Troubleshooting

During hot water production:

• Listen for air.

• Check the temperature difference between supply and return line.

Check that the start temperature is correctly set.

Should not be set above the factory set value.

Remedy

Bleed the system.

A Large temperature difference can indicate air in the system.

Check what the hot water sensor (the start sensor) shows, is it a plausible/actual value?

Measure the resistance of the sensor, check against the ohm table in the Measurement points section.

Check how many litres of hot water (approx.

40°C) per minute drains from the tap. Use a clock and bucket to measure the drain flow.

• If the start value is set too high, reduce it to the factory set value.

• If the system has a high (>+8°C) brine temperature, you may have to reduce the start value further for a longer running time.

If the sensor is defective, replace it.

How large is the requirement and what is the capacity of the heater?

Check the break pressure using manometer apparatus.

Is the exchange surface too small?

Can the heater cope with the heat pump’s output?

If the drain water flow is greater than 12l/min, stratification in the water heater is affected, which reduces the hot water capacity.

Suggested corrective actions:

• Install a pressure reduction valve on the incoming cold water pipe.

• Change to a mixer with lower flow.

• Adjust the drain flow on the existing mixer, do not open the tap fully.

Replace with a larger heater or supplement with an extra heater.

E.G. supplement with an MBH TWS + Connector or an electric heater.

If the pressure switch opens at the incorrect pressure, replace it.

The replacement pressure switch can be installed on the service output (Schrader valve)

Replace with a heater with a larger exchange surface.

Open the hot water tap, read off the temperature on the outgoing hot water pipe from the heat pump and the temperature of the hot water. The temperature difference measured between the heat pump and hot water indicates the temperature loss.

Examples of temperature loss causes:

• Long water pipes.

• Uninsulated hot water pipes.

• Hot water pipes routed through cold areas.

Other causes that can affect the hot water temperature:

• Is a mixer valve installed in the system?

Temperature set too low on the mixer valve?

Leaking mixer valve?

• Water tap fault? Leaking thermostat mixer?

If any problems occur during troubleshooting as per the points, carry out corrective actions.

To quickly check that the heat pump’s hot water production works as it should, drain the hot water so that the heat pump starts to produce the hot water. When done, read off the temperature on the top sensor and on the start sensor.

The top sensor should show a temperature of around 50-55°C and the start sensor around

45-48°C. If, after completed hot water production, these temperatures are obtained, this means that you have the correct temperature and volume of hot water in the water heater.

VMBMA202 71

HEATING COMFORT

Problem – Too cold

Cause

1. The heat pump’s control computer is not set/ adjusted to the customer’s requirements/wishes.

2. Incorrect operating mode set in the heat pump’s control computer.

3. Sensor fault, OUTDOOR/ROOM/Supply line/

Return line.

4. The 3-way valve has jammed in hot water mode.

Troubleshooting

Check the ROOM and CURVE and MAX settings.

Check which operating mode is set.

Check what the relevant sensor shows, is it a plausible/actual value?

Measure the resistance of the sensor, check against the ohm table in the Measurement points section.

1. Check the function of the 3-way valve motor by test running it manually. If the motor does not shift mode during manual test operation, check that there is voltage to the motor, see wiring diagram.

2. Detach the motor and test closing and opening of the valve by pressing the control arm.

Remedy

Adjust incorrect values in the heat pump’s control computer.

ROOM = Desired indoor temperature

CURVE = Should be set so that the desired indoor temperature (ROOM) is maintained regardless of the outdoor temperature.

MAX = Highest set-point value on the supply line regardless of the outdoor temperature.

If the incorrect operating mode is set, change to the desired operating mode.

If the sensor is defective, replace it.

1. Is the motor being supplied with voltage according to the wiring diagram in both operating instances?

MANUAL TEST – VXV HOT WATER

0=Radiator mode, arm out from valve.

1=Hot water mode, arm positioned towards the valve.

If there is voltage to the motor but the arm does not shift mode, replace it.

2. Take out and clean the jammed insert, or replace with a new insert.

If the electric heating element is defective, replace it.

If the MAX RETURN value is not adjusted for the system according to the troubleshooting window, adjust it.

If the sensor is defective, replace it.

5. Defective electric heating element. Use a buzzer and check if all coils in the electric heating element are intact.

6. The heat pump has stopped on HIGH RETURN. • Check what the MAX RETURN value is set at in the heat pump’s control computer. It must be adjusted to the unit’s maximum supply temperature and the system’s delta temperature so that it does not cut at too high a return temperature when the highest supply temperature is transmitted.

7. Heat production is stopped by the HYSTERESIS function.

• Check what the return line sensor shows, is it a plausible/actual value? If not, take a resistance reading from the sensors and check against the ohm table in the Measurement points section.

If the flow temperature rises as soon as heat production is stopped by HYSTERESIS before

INTEGRAL reaches 0, there may be heating deficit in the house.

• Check if heat production stops because the hysteresis value is set too low? (See the installation instructions for factory setting.)

• Check if heat production stops because thermostats/valves in the heating system are closed or partially closed?

• Check if heat production stops because the heating system is under dimensioned?

• Try increasing the hysteresis value until the heat pump stops on INTEGRAL instead.

• Open thermostats/valves in the heating system and check that the heat pump stops on

INTEGRAL.

• If the heating system is deemed to be under dimensioned, the system must be extended

(increase the heat emitting surface).

72 VMBMA202

Cause

8. The auxiliary heater is not permitted to cut in with sufficient output.

Value set too low on MAXSTEP.

MAXSTEP 1 = 3 kW

MAXSTEP 2 = 6 kW

MAXSTEP 3 = 9 kW

MAXSTEP 4 = 12 kW (only DHP-A, -AL)

MAXSTEP 5 = 15 kW (only DHP-A, -AL)

MAXSTEP +4 = 12 kW (only DHP-A, -AL)

MAXSTEP +5 = 15 kW (only DHP-A, -AL)

9. The external auxiliary heater does not start when the heat pump’s control computer requests it.

10. Closed or partially closed thermostats/valves in the heating system.

11. The total output of the heat pump and auxiliary heater is too low in relation to the building’s power demand.

12. Under dimensioned heating system.

13. Changed conditions.

Have you increased your heating and/or hot water demand?

Troubleshooting

Check the set value on MAXSTEP in the heat pump’s control computer.

If an external auxiliary heater is used, check that it is correctly installed by test running it in

MANUAL TEST – ADD.HEAT - 1.

If it does not start at manual test operation, check that the start signal/voltage comes from the heat pump. See wiring diagram.

Check that the thermostats/valves in the heating system are open.

What is the building’s power demand?

What is the output of the heat pump?

What is the output of the auxiliary heater, what is it set to?

Check existing heating system.

What output is it dimensioned for to produce at what supply temperature?

What output is required to keep the room warm?

• If the heat pump has been dimensioned for a certain demand and this demand is increased, the heat pump might not be able to maintain the desired room temperature.

• If hot water consumption increases, a larger proportion of time is used to produce hot water, which means less time for heat production (only applies to VL-systems).

Remedy

If necessary, adjust the MAXSTEP value in the heat pump’s control computer.

MAXSTEP 1 = 3 kW

MAXSTEP 2 = 6 kW

MAXSTEP 3 = 9 kW

MAXSTEP 4 = 12 kW (only DHP-A, -AL, cannot cut in when the compressor is running.)

MAXSTEP 5 = 15 kW (only DHP-A, -AL, cannot cut in when the compressor is running.)

MAXSTEP +4 = 12 kW (only DHP-A, -AL, can cut in when the compressor is running.)

MAXSTEP +5 = 15 kW (only DHP-A, -AL, can cut in when the compressor is running.)

Connect the external auxiliary heater according to the instructions.

Measure the voltage on the control computer’s probe L2 Oil/Electricity.

Open closed thermostats/valves.

Ensure that available power is at least as great as the building’s power demand.

If the heating system is dimensioned for greater supply temperatures than the heat pump can provide, it must be adjusted by increasing the heat emitting surface for example.

If the room requires a higher output than the heating system can provide, extend the heating system.

If the heat pump cannot cope with the demand, replace it with one with a higher output or supplement it with a higher output auxiliary heater.

VMBMA202 73

Problem – Too hot

Cause

1. The heat pump’s control computer is not set/ adjusted to the customer’s requirements/wishes.

2. Sensor fault, OUTDOOR/ROOM/Supply line.

3. Defective 3-way valve motor. The motor should set the valve to the relevant end position depending on operating conditions. If it does not, hot water from the water heater will mix with the radiator water.

4. Jammed 3-way valve insert.

If the insert is not sealed, hot water from the water heater will mix with the radiator water.

Troubleshooting

Check the ROOM and CURVE and MIN settings.

Check what the relevant sensor shows, is it a plausible/actual value?

Measure the resistance of the sensor, check against the ohm table in the Measurement points section.

Check the function of the 3-way valve motor by test running it manually. If the motor does not shift mode during manual test operation, check that there is voltage to the motor, see wiring diagram.

Detach the motor and test closing and opening of the valve by pressing the control arm.

Remedy

Adjust incorrect values in the heat pump’s control computer.

ROOM = Desired indoor temperature.

CURVE = Should be set so that the desired indoor temperature (ROOM) is maintained regardless of the outdoor temperature.

MIN = Lowest set-point value on the supply line regardless of the outdoor temperature.

If the sensor is defective, replace it.

Is the motor being supplied with voltage according to the wiring diagram in both operating instances?

MANUAL TEST – VXV HOT WATER

0=Radiator mode, arm out from valve.

1=Hot water mode, arm positioned towards the valve.

If there is voltage to the motor but the arm does not shift mode, replace it.

Take out and clean the jammed insert, or replace with a new insert.

Problem – irregular indoor temperature

Cause

1. The heat pump’s control computer is not set/ adjusted to the customer’s requirements/wishes.

2. Incorrectly positioned/installed sensors.

Troubleshooting

Check the ROOM and CURVE, MIN, MAX CURVE5,

CURVE0, CURVE-5 and HEATSTOP settings.

Check that outdoor sensors and any room sensors are installed according to the instructions and that they are calibrated.

Remedy

Adjust incorrect values in the heat pump’s control computer.

ROOM = Desired indoor temperature

CURVE = Should be set so that the desired indoor temperature (ROOM) is maintained regardless of the outdoor temperature.

MIN = Lowest set-point value on the supply line regardless of the outdoor temperature (on the condition that heat-stop does not apply).

MAX = Highest set-point value on the supply line regardless of the outdoor temperature.

CURVE5,0,-5 = The supply temperature can be adjusted up or down 5°C at these outdoor temperatures.

HEATSTOP = Stops all production of heat when the outdoor temperature is the same as or greater than the set value. To exit heat-stop the outdoor temperature must drop to 3°C below the set value.

• Check that the room sensor is positioned in a suitable place that is representative of the building and calibrate it if necessary. Avoid placing near external doors, windows and heat sources.

• Install the outdoor sensor according to the instructions and calibrate it, if necessary.

74 VMBMA202

OTHER

Problem – The heat pump runs and runs but never stops

Cause

1. Air in the heating system.

2. Lack of refrigerant, not enough refrigerant in the system.

3. Changed conditions. Have you increased your heating and/or hot water demand?

Troubleshooting

Listen for air in the heat pump and heating system.

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

• If the heat pump has been dimensioned for a certain demand and this demand is increased, the heat pump might not be able to maintain the desired room temperature.

• If hot water consumption increases, a larger proportion of time is used to produce hot water, which means less time for heat production (only applies to VL-systems).

Remedy

Bleed the heating system circuit according to the installation instructions.

Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.

If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action. If leak tracer is not available, brush soap water on the suspected leak and look for bubbles. Also check for oil as this can come out from the refrigerant circuit.

If the heat pump cannot cope with the demand, replace it with one with a higher output or supplement it with a higher output auxiliary heater.

Problem – Runs on electric heating element

Cause

1. Operating mode ADD.HEAT is selected.

2. The compressor cannot run due to an alarm.

3. The integral value has reached the start level for the auxiliary heater.

4. Peak heat operation (legionella function) is running.

Troubleshooting

If this operating mode is selected, the auxiliary heater is used for heating and hot water production, not the compressor.

Check the alarm that is indicated in the display.

Check what the integral value is in the control computer.

Check if the heat pump runs peak heat. See the instructions for the relevant model.

5. The heat pump has stopped on HIGH RETURN. • Check what the MAX RETURN value is set at in the heat pump’s control computer. It must be adjusted to the unit’s maximum supply temperature and the system’s delta temperature so that it does not cut at too high a return temperature when the highest supply temperature is transmitted.

• Check what the return line sensor shows, is it a plausible/actual value? If not, take a resistance reading from the sensors and check against the ohm table in the Measurement points section.

Remedy

If ADD.HEAT mode is selected and you no longer want it, change to AUTO, the heat pump then controls both the compressor and auxiliary heater.

Rectify the problem and rest the alarm. See the

Operational problem – Alarm, section.

If the auxiliary heater is in operation because the integral value has counted down to the start value, the computer reacts as it should, see the

Heat pump for further information.

Peak heat operation occurs in connection with hot water production with the set interval. The compressor should then start to produce hot water and 2 minutes later the auxiliary heater starts, the compressor should then stop and the stop temperature is reached with only the auxiliary heater connected. Take no corrective action.

If the MAX RETURN value is not adjusted for the system according to the troubleshooting window, adjust it.

If the sensor is defective, replace it.

VMBMA202 75

Cause

6. The compressor runs backwards. The incoming phases have the incorrect sequence (only applies to 3-phase heat pumps).

If the compressor runs backwards, it will not cope with compressing the refrigerant and therefore does not produce the correct power, which leads to the control computer requesting auxiliary heating.

7. Changed conditions. Have you increased your heating and/or hot water demand?

Troubleshooting

• If the text ERR PHASE SEQ appears in the display when the heat pump is powered, (only appears in the first 10 minutes) this means that the phases have the incorrect sequence.

• When the compressor is running, check the delivery pipe temperature by feeling the delivery pipe that should be hot (not just warm) even a little distance from the compressor if the phases are correctly sequenced.

• When the compressor runs with the phases incorrectly sequenced a strange noise may be heard (loud, rattling) when the compressor runs backwards.

• If the heat pump has been dimensioned for a certain demand and this demand is increased, the heat pump might not be able to maintain the desired room temperature.

• If hot water consumption increases, a larger proportion of time is used to produce hot water, which means less time for heat production (only applies to VL-systems).

Remedy

If the phases are in the incorrect order, switch two incoming phases at the main terminal block and recheck according to the troubleshooting window.

If the heat pump cannot cope with the demand, replace it with one with a higher output or supplement it with a higher output auxiliary heater.

Problem – The auxiliary heater is in operation but not the compressor

Cause

1. Operating mode ADD.HEAT is selected.

2. Peak heat operation (legionella function) is running.

3. The compressor cannot run due to an alarm.

4. The heat pump has stopped on high return.

5. The compressor has been stopped by the operating pressure switch or delivery pipe sensor.

Troubleshooting

If this operating mode is selected, the auxiliary heater is used for heating and hot water production, not the compressor.

Check if the heat pump runs peak heat. See the instructions for the relevant model.

Remedy

If ADD.HEAT mode is selected and you no longer want it, change to AUTO, the heat pump then controls both the compressor and auxiliary heater.

Peak heat operation occurs in connection with hot water production with the set interval. The compressor should then start to produce hot water and 2 minutes later the auxiliary heater starts, the compressor should then stop and the stop temperature is reached with only the auxiliary heater connected. Take no corrective action, this is normal.

Check the alarm that is indicated in the display. Rectify the problem and rest the alarm. See the

Operational problem – Alarm, section.

• Check what the MAX value is set at in the heat pump’s control computer. It must be adjusted to the unit’s maximum supply temperature and the system’s delta temperature so that it does not cut at too high a return temperature when the highest supply temperature is transmitted.

• If the MAX RETURN value is not adjusted for the system according to the troubleshooting window, adjust it.

• If the sensor is defective, replace it.

• Check what the return line sensor shows, is it a plausible/actual value? If not, take a resistance reading from the sensors and check against the ohm table in the Measurement points section.

Check if a square appears in the display’s lower let corner, if so, the operating pressure switch is open or the delivery pipe sensor triggers an alarm for too high temperature.

• The operating pressure switch is most easily checked by using a buzzer to see if it is connected.

• The delivery pipe sensor value is read off from the control computer in the HEATPUMP menu. Is it a plausible/actual value? If not, take a resistance reading from the sensor and check against the ohm table in the Measurement points section.

• The compressor has been stopped by the delivery pipe sensor and you have established that it shows the correct temperature. This may have been caused by a leak in the refrigerant circuit.

If the operating pressure switch has stuck in the open position, try gently tapping on the pressure switch head. If this does not help, or it sticks in the open position repeatedly, replace the pressure switch.

If the delivery pipe sensor is defective, replace it.

If the delivery pipe temperature gets so hot that the compressor stops, start by leak-tracing the unit. Rectify the leak, if a leak is found. If no leak is found, try draining and refilling the unit and then restarting the heat pump and seeing what the delivery pipe temperature is. If the problem persists, replace the compressor.

76 VMBMA202

Cause

6. The built-in overheating protection (bi-metal protection) in the compressor has tripped.

7. The compressor runs backwards. The incoming phases have the incorrect sequence (only applies to 3-phase heat pumps). If the compressor runs backwards, it will not cope with compressing the refrigerant and therefore does not produce the correct power, which leads to the control computer requesting auxiliary heating.

Troubleshooting

Check if the heat pump’s control computer indicates that the compressor is in operation, and if there is voltage between soft-starters A1 and A2.

Then read off and check that there is voltage on the compressor’s three electrical connections (L1,

L2 and L3).

• If the text ERR PHASE SEQ appears in the display when the heat pump is powered, (only appears in the first 10 minutes) this means that the phases have the incorrect sequence.

• When the compressor is running, check the delivery pipe temperature by feeling the delivery pipe that should be hot (not just warm) even a little distance from the compressor if the phases are correctly sequenced.

• When the compressor runs with the phases incorrectly sequenced a strange noise may be heard (loud, rattling) when the compressor runs backwards.

Remedy

If there is voltage on the compressor’s three electrical connections and the overheating protection does not close when the compressor has not run and has cooled down for at least 1 hour, replace the compressor.

If the phases are in the incorrect order, switch two incoming phases at the main terminal block and recheck according to the troubleshooting window.

Problem – The heat pump consumes too much energy

Cause

1. Blocked strainer in the heating system.

2. The compressor cannot run due to an alarm.

Troubleshooting

Check that the strainer is not blocked.

Check the alarm that is indicated in the display.

3. Incorrect flow over hot side of the heat pump. Measurement check what the difference between the supply and return line is using a thermometer

(∆t). The difference should be about 7-10°C (can vary depending on refrigerant). A lower ∆t results in reduced efficiency in the heat pump.

4. Incorrect flow in the brine circuit. Measurement check what the difference between the supply and return line is using a thermometer

(∆t). The difference should not be more than 4°C.

A greater ∆t results in reduced efficiency in the heat pump.

5. The heat pump’s control computer is not set/ adjusted to the customer’s requirements/wishes.

Check the ROOM and CURVE and MIN settings.

Remedy

Clean the strainer if necessary.

Rectify the problem and rest the alarm. See the

Operational problem – Alarm, section.

Adjust the system to obtain the correct ∆t.

If the difference is greater than 4°C note what is causing it. E.G.: Dirt in the filter, system restrictions, system with high pressure drop.

6. The interval for peak heat operation has changed to a lower value than the factory set value.

This results in the heat pump going into peak heat operation more often than calculated.

7. The heat pump has stopped on HIGH RETURN.

Check the specified interval for peak heat operation in the control computer, see instructions for relevant model.

• Check what the MAX RETURN value is set at in the heat pump’s control computer. It must be adjusted to the unit’s maximum supply temperature and the system’s delta temperature so that it does not cut at too high a return temperature when the highest supply temperature is transmitted.

• Check what the return line sensor shows, is it a plausible/actual value? If not, take a resistance reading from the sensors and check against the ohm table in the Measurement points section.

Adjust incorrect values in the heat pump’s control computer.

ROOM = Desired indoor temperature.

CURVE = Should be set so that the desired indoor temperature (ROOM) is maintained regardless of the outdoor temperature.

MIN = Lowest set-point value on the supply line regardless of the outdoor temperature.

If there is a shorter interval between the peak heat productions, this explains why the unit consumes more current than calculated, but this does not mean for sure that it should be increased, there might be a reason why the interval has been changed.

If the MAX RETURN value is not adjusted for the system according to the troubleshooting window, adjust it.

If the sensor is defective, replace it.

VMBMA202 77

Cause

8. The compressor runs backwards. The incoming phases have the incorrect sequence (only applies to 3-phase heat pumps). If the compressor runs backwards, it will not cope with compressing the refrigerant and therefore does not produce the correct power, which leads to the control computer requesting auxiliary heating.

9. The compressor has been stopped by the operating pressure switch or delivery pipe sensor.

Troubleshooting

• If the text ERR PHASE SEQ appears in the display when the heat pump is powered, (only appears in the first 10 minutes) this means that the phases have the incorrect sequence.

• When the compressor is running, check the delivery pipe temperature by feeling the delivery pipe that should be hot (not just warm) even a little distance from the compressor if the phases are correctly sequenced.

• When the compressor runs with the phases incorrectly sequenced a strange noise may be heard (loud, rattling) when the compressor runs backwards.

Check if a square appears in the display’s lower let corner, if so, the operating pressure switch is open or the delivery pipe sensor triggers an alarm for too high temperature.

• The operating pressure switch is most easily checked by using a buzzer to see if it is connected.

• The delivery pipe sensor value is read off from the control computer in the HEATPUMP menu.

Is it a plausible/actual value? If not, take a resistance reading from the sensor and check against the ohm table in the installation instructions.

• The compressor has been stopped by the delivery pipe sensor and you have established that it shows the correct temperature. This may have been caused by a leak in the refrigerant circuit.

10. Expansion valve defective or incorrectly set. Using manometer apparatus and thermometer check what the overheating reading of the unit is.

Also check that bulb and capillary tube are undamaged and that the bulb is correctly installed.

11. Lack of refrigerant, not enough refrigerant in the system.

12. Overfilled refrigerant circuit.

13. Short active collector, e.g. short or dry bore hole, short surface soil collector.

14. Changed conditions. Have you increased your heating and/or hot water demand?

Remedy

If the phases are in the incorrect order, switch two incoming phases at the main terminal block and recheck according to the troubleshooting window.

If the operating pressure switch has stuck in the open position, try gently tapping on the pressure switch head. If this does not help, or it sticks in the open position repeatedly, replace the pressure switch.

If the delivery pipe sensor is defective, replace it.

If the delivery pipe temperature gets so hot that the compressor stops, start by leak-tracing the unit. Rectify the leak, if a leak is found. If no leak is found, try draining and refilling the unit and then restarting the heat pump and seeing what the delivery pipe temperature is. If the problem persists, replace the compressor.

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

If the overheating reading does not correspond with the instructions for the specific refrigerant, adjust the expansion valve until the correct value is obtained. See separate instructions for cooling techniques.

If overheating cannot be adjusted with the expansion valve or if the capillary tube/bulb is damaged, replace it.

Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.

If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action. If leak tracer is not available, brush soap water on the suspected leak and look for bubbles. Also check for oil as this can come out from the refrigerant circuit.

If cooling is not at the correct level compared with the specific refrigerant and is too high, there is too much refrigerant in the unit. Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.

If the active collector is too short, the heat pump cannot receive enough energy from the heat source , which results in it requiring an addition to cover the energy requirement.

• Check the length of the collector that is being used and compare with the collector length in the dimensioning documentation.

• In addition, check that the collector is not suspended ”in free air” if boreholes are used.

• If the heat pump has been dimensioned for a certain demand and this demand is increased, the heat pump might not be able to maintain the desired room temperature.

• If hot water consumption increases, a larger proportion of time is used to produce hot water, which means less time for heat production (only applies to VL-systems).

If the heat pump cannot cope with the demand, replace it with one with a higher output or supplement it with a higher output auxiliary heater.

78 VMBMA202

Problem – Auxiliary heater cuts in too soon

Cause

1. The heat pump’s control computer is not set/ adjusted to the customer’s requirements/wishes.

2. Lack of refrigerant, not enough refrigerant in the system.

3. Short active collector, e.g. short or dry bore hole, short surface soil collector.

4. Collector too long, pressure drop too great.

5. Changed conditions. Have you increased your heating and/or hot water demand?

Troubleshooting

Check the ROOM, CURVE, INTEGRAL A1 and

INTEGRAL A2 settings

Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.

Remedy

Adjust incorrect values in the heat pump’s control computer.

ROOM = Desired indoor temperature.

CURVE = Should be set so that the desired indoor temperature (ROOM) is maintained regardless of the outdoor temperature.

INTEGRAL A1 = Start value for the compressor.

INTEGRAL A2 = Start value (calculated from A1) for the auxiliary heater.

Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.

If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action. If leak tracer is not available, brush soap water on the suspected leak and look for bubbles. Also check for oil as this can come out from the refrigerant circuit.

If the active collector is too short, the heat pump cannot receive enough energy from the heat source , which results in it requiring an addition to cover the energy requirement.

• Check the length of the collector that is being used and compare with the collector length in the dimensioning documentation.

• In addition, check that the collector is not suspended ”in free air” if boreholes are used.

Check the length of the collector that is being used and that it is connected in parallel (not connected in series) if more than 1 coil is being used.

• If the heat pump has been dimensioned for a certain demand and this demand is increased, the heat pump might not be able to maintain the desired room temperature.

• If hot water consumption increases, a larger proportion of time is used to produce hot water, which means less time for heat production (only applies to VL-systems).

If a longer collector is being used than recommended for the specific heat pump, it must be divided on several parallel connected coils.

If the heat pump cannot cope with the demand, replace it with one with a higher output or supplement it with a higher output auxiliary heater.

Problem – Short operating times despite heating demand

Cause

ROOM and/or CURVE set too high in combination with a heating system with poor circulation due to closed radiator valves, too small elements or insufficient water volume. A tight fitting system with poor pipe dimensions may produce the same phenomena.

Troubleshooting

Check if the heat pumps starts, if the supply temperature rises quickly whilst nothing happens to the return temperature.

If this happens and the heat pump is stopped by the hysteresis function to later drop in temperature (supply) as quickly to start again, but cannot due to time conditions in regulation, this means that the heat pump cannot transport the heat away from the condenser as it should.

In such a case, hysteresis starts and stops the heat pump often.

Remedy

Adjust ROOM and CURVE if necessary, ensure that there is sufficient flow over the condenser and the heating circuit.

Problem – Connection of external AH

Cause

Incorrectly connected auxiliary heater. Does not start when the control computer gives the signal.

Troubleshooting

Check the connection against the instructions/ wiring diagram. Test the function in manual mode.

Remedy

If the auxiliary heater is incorrectly connected, reconnect according to the instructions.

VMBMA202 79

80 VMBMA202

OUTDOOR UNIT

Problem – Noise/loud noise

Cause

1. Positioning the outdoor unit.

2. Connection/wall lead-ins.

Troubleshooting

Determine whether the outdoor unit can be moved to a more suitable location.

Check that the unit is installed according to the instructions.

Is the outdoor unit secured to the wall?

Remedy

When positioning the outdoor unit, its direction does not affect its performance. The outdoor unit does not need to be positioned as close to the heat pump as necessary, it can be positioned as far as 30 ”pipe metres” way.

Rigid mountings can generate noise from the outdoor section via walls in the house.

Problem – Defrosting problems

Cause

1. Location/calibration of the outdoor sensor.

2. Brine temperature in/out.

3. The defroster shunt does not regulate as it should.

Troubleshooting

Check that the outdoor sensor is installed according to the installation instructions and that it is correctly calibrated.

Measurement check the temperatures with a thermometer.

Manually test to check if the defroster shunt opens and closes the flow over the defroster tank.

If the motor switches position when testing, but defrosting still does not function, remove the motor and try closing and opening the valve by hand by pressing in the control arm.

Remedy

Install according to the instructions and calibrate, if necessary. Alternatively, the outdoor sensor can be located behind the outdoor unit 20 cm out from the rear side of the outdoor unit.

If necessary, calibrate BRINE IN and BRINE OUT in the heat pump’s control computer.

If the motor is defective, replace it.

If the insert jams, remove and clean/lubricate it, or replace it.

Problem – Build-up of ice under and around the outdoor unit

Cause

Insufficient drainage.

Troubleshooting

Does a lot of ice accumulate under and around the outdoor unit because the melted water has no where to run?

Remedy

Drain the ground under and around the outdoor section or

Install a drip tray with a drainpipe routed to an indoor drain or gully. NOTE! A heating cable may have to be installed in the drainpipe.

Problem – Water run-off by the outdoor unit, risk of moisture problems in house foundations

Cause

Insufficient drainage.

Troubleshooting

During some periods when the outdoor unit is being defrosted, large amounts (20-40 L/day) of water can run off.

Remedy

Drain the ground under and around the outdoor unit so that it can cope with the extra amount of water produced because of defrosting or

Install a drip tray with a drainpipe routed to an indoor drain or gully. NOTE! A heating cable may have to be installed in the drainpipe.

VMBMA202 81

17 Technical data

Heat pump DHP-H

Refrigerant Type

Amount

Test pressure

Design pressure kg

MPa

MPa

Compressor

Electrical data 3-N

Electrical data 1-N

Performance 1)

Type

Oil

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

3 steps

Start current kW

A

Circuit breaker A

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

3 steps

Start current

Circuit breaker kW

A

A

Output capacity

Heat factor kW

COP

Nominal flow 6)

External available pressure 5)

Max/min temperature Cooling circuit

Heating circuit

Pressure switches Low pressure

Operating

High pressure

Anti freeze media

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit l/s l/s kPa kPa o o

C

C

MPa

MPa

MPa

Water heater volume

Weight l kg

4

R407C

0.75

3.2

3.1

Scroll

POE

400/50Hz

2.7

3/6/9

10 2)

36

/10 3) /16 4)

230/50Hz

2.7

1.5/3/4.5

20 2)

36

/25 3) /32 4)

3.2

2.6

0.2

0.1

31

47

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

229

8

R407C

1.30

3.2

3.1

Scroll

POE

400/50Hz

2.3

3/6/9

16 2)

25

/16 3) /20 4)

230/50Hz

4.2

1.5/3/4.5

25 2)

56

/32 3) /40 4)

7.2

3.1

0.5

0.2

33

42

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

229

6

R407C

1.20

3.2

3.1

Scroll

POE

400/50Hz

2.0

3/6/9

10 2)

14

/16 3) /20 4)

230/50Hz

3.3

1.5/3/4.5

25 2)

58

/32 3) /40 4)

4.9

2.8

0.3

0.1

31

44

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

229

12

R407C

1.55

3.2

3.1

Scroll

POE

400/50Hz

4.4

3/6/9

16 2)

32

/20 3) /25 4)

230/50Hz

5.7

1.5/3/4.5

32 2)

108

/40 3) /50 4)

10.7

3.1

0.6

0.3

64

51

20/10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

238

10

R407C

1.45

3.2

3.1

Scroll

POE

400/50Hz

3.6

3/6/9

16 2)

29

/16 3) /20 4)

230/50Hz

5.4

1.5/3/4.5

32 2)

97

/40 3) /50 4)

8.9

3.2

0.6

0.2

32

39

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

229

16

R407C

2.10

3.2

3.1

Scroll

POE

400/50Hz

5.6

3/6/9

20 2)

45

/20 3) /25 4)

* )

* )

* )

* )

* )

15.2

3.2

0.9

0.4

56

57

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

242

1) At B0W45 according to EN 14511 (including circulation pumps).

2) Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).

3) Heat pump with 6 kW auxiliary heater (1-N 3 kW).

4) Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).

5) Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.

6)

For the cooling circuit these values require a pipe of Ø 40x2.4.

Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.

* ) Not available in 230V 1-N version.

82 VMBMA202

Heat pump DHP-C

Refrigerant Type

Amount

Test pressure

Design pressure kg

MPa

MPa

Compressor

Electrical data 3-N

Electrical data 1-N

Performance 1)

Type

Oil

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

3 steps

Start current kW

A

Circuit breaker A

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

3 steps

Start current

Circuit breaker kW

A

A

Output capacity

Heat factor kW

COP

Nominal flow 6)

External available pressure 5)

Max/min temperature Cooling circuit

Heating circuit

Pressure switches Low pressure

Operating

High pressure

Anti freeze media

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit l/s l/s kPa kPa o o

C

C

MPa

MPa

MPa

Water heater volume

Weight l kg

4H

R134a

0.90

3.2

2.45

Scroll

POE

400/50Hz

2.7

3/6/9

10 2)

36

/10 3) /16 4)

230/50Hz

2.7

1.5/3/4.5

20 2)

36

/25 3) /32 4)

3.2

2.7

0.20

0.08

34

61

20/-10

55/20

0.03

1.80

2.45

Ethylene glycol/

Ethanol

180

210

7H

R134a

1.10

3.2

2.45

Scroll

POE

400/50Hz

2.3

3/6/9

10 2)

29

/16 3) /20 4)

230/50Hz

4.2

1.5/3/4.5

25 2)

76

/32 3) /40 4)

5.5

2.9

0.37

0.14

54

58

20/-10

55/20

0.03

1.80

2.45

Ethylene glycol/

Ethanol

180

225

5H

R134a

1.00

3.2

2.45

Scroll

POE

400/50Hz

2.0

3/6/9

10 2)

14

/16 3) /20 4)

230/50Hz

3.3

1.5/3/4.5

25 2)

58

/32 3) /40 4)

4.5

2.9

0.28

0.12

48

60

20/-10

55/20

0.03

1.80

2.45

Ethylene glycol/

Ethanol

180

215

8

R407C

1.30

3.2

3.1

Scroll

POE

400/50Hz

2.3

3/6/9

16 2)

25

/16 3) /20 4)

230/50Hz

4.2

1.5/3/4.5

32 2)

56

/40 3) /50 4)

7.2

3.1

0.5

0.2

33

42

20/-25

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

215

6

R407C

1.20

3.2

3.1

Scroll

POE

400/50Hz

2.0

3/6/9

10 2)

14

/16 3) /20 4)

230/50Hz

3.3

1.5/3/4.5

32 2)

58

/40 3) /50 4)

4.9

2.8

0.3

0.1

31

44

20/-25

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

210

10

R407C

1.45

3.2

3.1

Scroll

POE

400/50Hz

3.6

3/6/9

16 2)

29

/16 3) /20 4)

230/50Hz

5.4

1.5/3/4.5

32 2)

97

/40 3) /50 4)

8.9

3.2

0.6

0.2

32

39

20/-25

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

180

225

1) At B0W45 according to EN 14511 (including circulation pumps).

2) Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).

3) Heat pump with 6 kW auxiliary heater (1-N 3 kW).

4) Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).

5) Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.

6)

For the cooling circuit these values require a pipe of Ø 40x2.4.

Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.

VMBMA202 83

Heat pump DHP-L

Refrigerant Type

Amount

Test pressure

Design pressure kg

MPa

MPa

Compressor

Electrical data 3-N

Electrical data 1-N

Performance 1)

Type

Oil

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

3 steps

Start current kW

A

Circuit breaker A

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

3 steps

Start current

Circuit breaker kW

A

A

Output capacity

Heat factor kW

COP

Nominal flow 6)

External available pressure 5)

Max/min temperature Cooling circuit

Heating circuit

Pressure switches Low pressure

Operating

High pressure

Anti freeze media

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit l/s l/s kPa kPa o o

C

C

MPa

MPa

MPa

Weight kg

4

R407C

0.75

3.2

3.1

Scroll

POE

400/50Hz

2.7

3/6/9

10 2)

36

/10 3) /16 4)

230/50Hz

2.7

1.5/3/4.5

20 2)

36

/25 3) /32 4)

3.2

2.6

0.2

0.1

31

47

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

140

6

R407C

1.20

3.2

3.1

Scroll

POE

400/50Hz

2.0

3/6/9

10 2)

14

/16 3) /20 4)

230/50Hz

3.3

1.5/3/4.5

25 2)

58

/32 3) /40 4)

4.9

2.8

0.3

0.1

31

44

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

145

8

R407C

1.30

3.2

3.1

Scroll

POE

400/50Hz

2.3

3/6/9

16 2)

25

/16 3) /20 4)

230/50Hz

4.2

1.5/3/4.5

25 2)

56

/32 3) /40 4)

7.2

3.1

0.5

0.2

33

42

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

150

10

R407C

1.45

3.2

3.1

Scroll

POE

400/50Hz

3.6

3/6/9

16 2)

29

/16 3) /20 4)

230/50Hz

5.4

1.5/3/4.5

32 2)

97

/40 3) /50 4)

8.9

3.2

0.6

0.2

32

39

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

155

12

R407C

1.55

3.2

3.1

Scroll

POE

400/50Hz

4.4

3/6/9

16 2)

32

/20 3) /25 4)

230/50Hz

5.7

1.5/3/4.5

32 2)

108

/40 3) /50 4)

10.7

3.1

0.6

0.3

64

51

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

165

16

R407C

2.10

3.2

3.1

Scroll

POE

400/50Hz

5.6

3/6/9

20 2)

45

/20 3) /25 4)

* )

* )

* )

* )

* )

15.2

3.2

0.9

0.4

56

57

20/-10

55/20

0.08

2.65/2.85

3.10

Ethylene glycol/

Ethanol

175

1) At B0W45 according to EN 14511 (including circulation pumps).

2) Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).

3) Heat pump with 6 kW auxiliary heater (1-N 3 kW).

4) Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).

5) Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.

6)

For the cooling circuit these values require a pipe of Ø 40x2.4.

Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.

* ) Not available in 230V 1-N version.

84 VMBMA202

Heat pump DHP-A, DHP-AL

Refrigerant

Compressor

Electrical data 3-N

Type

Amount

Test pressure

Design pressure kg

MPa

MPa

Type

Oil

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

5 steps

Start current kW

A

Circuit breaker A

Electrical data 1-N

Performance

Nominal flow

1)

7)

Main supply Volt

Rated power, compressor kW

Auxiliary heater, max

3 steps

Start current

Circuit breaker kW

A

A

Output capacity

Heat factor

Cooling circuit

Heating circuit kW

COP l/s l/s kPa kPa o

C

External available pressure 8)

Cooling circuit

Heating circuit

Lowest outdoor temperature allowed for compressor start

Max/min temperature Cooling circuit

Heating circuit

Pressure switches Low pressure

Operating

High pressure

Fan speed outdoor unit, low/high

Air flow

Sound pressure level away from outdoor unit 9)

1 m

5 m

10 m

15 m

Max. pipe lenght (Ø28mm) between heat pump and outdoor unit

Anti freeze media 10)

Water heater volume

Weight, heat pump / outdoor unit l kg o o

C

C

MPa

MPa

MPa rpm m 3 /h dB(A) dB(A) dB(A) dB(A) m

1) At A7W45 according to EN 14511 (including circulation pumps and

2) outdoor unit).

Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).

3) Heat pump with 6 kW auxiliary heater (1-N 3 kW).

4) Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).

5) 12 kW auxiliary heater (compressor off).

6

R404A

0.95

3.2

3.1

Scroll

POE

400/50Hz

2.0

3/6/9/12/15

10 3)

14

/16 4) /20 5) /

20 6) /25 7)

230/50Hz

3.3

1.5/3/4.5

25 3)

58

/32 4) /40 5)

5.7

2.7

0.2

0.3

30

45

-20

20/-25

55/20

0.08

2.65/2.85

3.10

340/650

1600/3000

45/51

31/37

25/31

21/27

60 (30+30)

8

R404A

1.45

3.2

3.1

Scroll

POE

400/50Hz

2.3

3/6/9/12/15

16 3)

25

/16 4) /20 5) /

20 6) /25 7)

230/50Hz

4.2

1.5/3/4.5

25 3)

56

/32 4) /40 5)

7.7

2.9

0.3

0.4

22

42

-20

20/-25

55/20

0.08

2.65/2.85

3.10

340/650

1600/3000

45/51

31/37

25/31

21/27

60 (30+30)

10

R404A

1.50

3.2

3.1

Scroll

POE

400/50Hz

3.6

3/6/9/12/15

16 3)

29

/16 4) /20 5) /

20 6) /25 7)

230/50Hz

5.4

1.5/3/4.5

32 3)

97

/40 4) /50 5)

10.6

2.9

0.6

0.5

50

43

-20

20/-25

55/20

0.08

2.65/2.85

3.10

575/925

3000/4500

51/61

37/47

31/41

27/37

60 (30+30)

20/-25

55/20

0.08

2.65/2.85

3.10

575/925

3000/4500

51/61

37/47

31/41

27/37

60 (30+30)

Ethylene glycol Ethylene glycol Ethylene glycol Ethylene glycol

180 180 180 180

260/80 260/80 260/80 268/80

6) 15 kW auxiliary heater (compressor off).

7) Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.

8) Pressure drop that must not be exceeded outside the heat pump with-

9) out the nominal flow being reduced.

Sound pressure measured by SEMKO according to EN ISO 3744.

10) For Atria models, do not use propylene glycol or ethanol.

12

R404A

1.60

3.2

3.1

Scroll

POE

400/50Hz

4.4

3/6/9/12/15

16 3)

32

/20 4) /25 5) /

25 6) /25 7)

230/50Hz

5.7

1.5/3/4.5

32 3)

108

/40 4) /50 5)

10.8

2.7

0.5

0.5

43

52

-20

VMBMA202 85

86 VMBMA202

Appendix

VMBMA202 87

88 VMBMA202

VMBMA202 89

90 VMBMA202

VMBMA202 91

92 VMBMA202

VMBMA202 93

94 VMBMA202

VMBMA202 95

VMBMA202

advertisement

Was this manual useful for you? Yes No
Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Related manuals

advertisement

Table of contents