13353334293784

Service instructions

DHP-A

DHP-A Opti

DHP-AL

DHP-AL Opti

DHP-C

DHP-H

DHP-H Opti

DHP-H Opti Pro

DHP-L

DHP-L Opti

DHP-L Opti Pro

VMGFC302

If these instructions are not followed during installation and service, Danfoss A/Sliability according to the applicable warranty is not binding. Danfoss A/S retains the right to make changes to components and specifications without prior notice.

© 2010 Copyright Danfoss A/S.

The Swedish language is used for the original instructions. Other languages are a translation of original instructions.

(Directive 2006/42/EG)

Contents

3

4

1

2

5

6

7

8

9

10

11

12

13

14

15

16

17

About documents and decals....................................................... 3

1.1

1.2

1.3

1.4

Introduction..................................................................................... 3

Symbols in documents................................................................. 3

Symbols on decals......................................................................... 4

Terminology..................................................................................... 5

Important information..................................................................... 6

2.1

2.2

2.3

Refrigerant........................................................................................ 6

Electrical connection..................................................................... 7

Commissioning............................................................................... 7

Check and safety functions............................................................ 8

Heat pump data, components................................................... 10

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

DHP-H, DHP-H Opti..................................................................... 10

DHP-H Opti Pro............................................................................. 11

DHP-C............................................................................................... 12

DHP-L, DHP-L Opti....................................................................... 13

DHP-L Opti Pro.............................................................................. 14

DHP-A, DHP-A Opti..................................................................... 15

DHP-AL, DHP-AL Opti................................................................. 16

Outdoor unit DHP-A, DHP-AL, DHP-A Opti, DHP-AL Opti. 17

Transport, unpacking and setting-up...................................... 18

5.1

Separating the heat pump....................................................... 18

Piping installation........................................................................... 21

6.1

6.2

6.3

Information collector pipe........................................................ 21

Connection of several brine coils........................................... 21

Noise information........................................................................ 22

Electrical Installation...................................................................... 24

7.1

Cable connection......................................................................... 24

Installing accessories/additional functions............................ 25

8.1

8.2

8.3

8.4

Room sensor.................................................................................. 25

EVU function.................................................................................. 26

Tariff control.................................................................................. 26

Level switch................................................................................... 27

Important parameters................................................................... 28

9.1

9.2

9.3

9.4

9.5

9.6

9.7

9.8

9.9

Heat production - calculating................................................. 28

CURVE.............................................................................................. 28

ROOM............................................................................................... 29

HEAT STOP..................................................................................... 30

MIN and MAX................................................................................ 30

TEMPERATURES............................................................................ 30

INTEGRAL........................................................................................ 31

HYSTERESIS.................................................................................... 32

DEFR CURVE................................................................................... 32

Troubleshooting............................................................................ 35

10.1

10.2

10.3

10.4

Alarm.............................................................................................. 35

Measurement points................................................................ 35

Check points................................................................................ 36

Operational problems............................................................. 37

Technical data, DHP-H................................................................. 62

Technical data; DHP-H Opti....................................................... 64

Technical data; DHP-H Opti Pro............................................... 66

Technical data, DHP-L................................................................. 68

Technical data, DHP-L Opti........................................................ 70

Technical data; DHP-L Opti Pro................................................ 72

Technical data, DHP-C................................................................. 74

18

19

20

21

Technical data, DHP-A................................................................. 76

Technical data, DHP-A Opti....................................................... 78

Technical data, DHP-AL.............................................................. 80

Technical data, DHP-AL Opti..................................................... 82

VMGFC302 – 1

1 About documents and decals

1.1

Introduction

The following documents are available for this product:

•

Installation instructions containing information to install and commission a heat pump installation. Supplied with the heat pump on delivery.

•

The service instructions contain information about the heat pump’s function, accessories, fault tracing and technical data. The instructions also contain tips and advice that should be followed before a heat pump installation. It is therefore recommended that the instructions are read before installation.

The service instructions are available for download as below.

•

The electrical instructions that contain the wiring diagram for the heat pump intended for fault tracing and service. The electrical instructions are available for download as below.

•

The maintenance instructions must handed over and gone through with the end customer. Supplied with the heat pump on delivery.

•

Country specific instructions and forms are available where relevant. Supplied with the heat pump on delivery.

•

Self-adhesive decals with translation text. Must be placed on the manufacturing plate in conjunction with installation. Supplied with the heat pump on delivery.

The Service instructions and Electrical instructions are available for download here:

www.documentation.heatpump.danfoss.com

1.2

Symbols in documents

The instructions contain different warning symbols, which, together with text, indicate to the user that there are risks involved with actions to be taken.

The symbols are displayed to the left of the text and three different symbols are used to indicate the degree of danger:

DANGER! Indicates an immediate danger that leads to fatal or serious injury if necessary measures are not taken.

Warning! Risk of personal injury!Indicates a possible danger that can lead to fatal or serious injury if necessary measures are not taken.

Caution! Risk of installation damage.Indicates a possible hazard that can lead to item damage if necessary measures are not taken.

A fourth symbol is used to give practical information or tips on how to perform a procedure.

Note! Information regarding making the handling of the installation easier or a possible operational technical disadvantage.

Service instructions VMGFC302 – 3

1.3

Symbols on decals

!

!

Warning, danger!

Read the documentation provided.

Read the documentation provided.

Warning, hazardous electrical voltage!

Warning, hot surfaces!

Warning, moving parts!

Warning, risk of crushing injury!

Pipe connections

Tap water

Heating system

Brine

Defrosting tank

Expansion tank with safety valve, brine

Bleeding

4 – Service instructions VMGFC302

Temperature and pressure relief valve

Outdoor unit

Water heater

Electrical components

Component, normal Component, accessory

54

55

3

50

71

Outdoor unit

Outdoor sensor

Hot water sensor

Sensor hot-water top

Flow guard

353

362

406

408

417

Drip tray

Shunt valve

Room sensor

EVU

Defrost sensor

1.4

Terminology

Table 1.

Terminology

Term

Heating system/Heat transfer fluid circuit

Supply line

Return line

Circulation pump

Refrigerant circuit

Refrigerant

Brine circuit

Brine

Meaning

The circuit that generates heat to the property or to the water heater.

The heating system’s supply line with flow direction from the heat pump to radiators/ under floor heating or water heater.

The heating system’s return line with flow direction from radiators/under floor heating or water heater to the heat pump.

Circulation pump for heating system or brine circuit.

The energy carrying circuit between the outdoor air and heating system.

The gas/liquid that circulates in the refrigerant circuit.

The circuit that transports energy to or from the heat source.

The fluid that circulates in the brine system.


2 Important information

Warning! Risk of personal injury! Children are not permitted to play with the product.

Caution! This product 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.

2.1

Refrigerant

Caution! 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 environmentallyapproved refrigerant that will not affect the ozone layer, work on this system may only be carried out by authorized persons.

2.1.1

Fire risk

The refrigerant is not combustible or explosive in normal conditions.

2.1.2

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.

Warning! Risk of personal injury! Spaces in which heavy vapour can collect below the level of the air must be well ventilated.

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.

Warning! Risk of personal injury! 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.

2.1.3

Work on the refrigerant circuit

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

Caution! When repairing the refrigerant circuit, the refrigerant must not be released from the heat pump, it must treated in the appropriate way.


Draining and refilling must only be carried out using new refrigerant (for the amount of refrigerant see manufacturer’s plate) through the service valves.

Caution! All warranties from Danfoss are void if, when filling with refrigerant other than Danfoss A/S specified refrigerant, if there has not been written notification that the new refrigerant is an approved replacement refrigerant together with other remedies.

2.1.4

Scrapping

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

2.2

Electrical connection

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

DANGER! Hazardous electrical voltage! The terminal blocks are live and can be highly dangerous due to the risk of electric shock. All power supplies 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.

2.3

Commissioning

Caution! The installation may only be commissioned if the heating system is filled and bled. Otherwise the circulation pump can be damaged.

Caution! If the installation is only to operate using an auxiliary heater during the installation, ensure that the heating system is filled and bled and that the compressor cannot be started. This is carried out by setting the operating mode to INFORMATION --> OPERAT.--> AUX. HEATER


3

3

8

Check and safety functions

The heat pump has a number of check and safety functions to protect the installation against damage during abnormal operating conditions.

The diagram below shows the heat pump's three circuits with respective safety functions.

2

1

6

5

4

7

9

3

4

5

8

9

6

7

Symbol explanation

1

2

Heat transfer fluid circuit

Safety valve, heat transfer fluid circuit, externally mounted

Refrigerant circuit

Operating pressure switch, normal

Operating pressure switch, alternative (only on certain heat pumps)

High pressure switch

Low pressure switch

Brine circuit

Safety valve, brine fluid circuit, externally mounted

Figure 1.

Check and safety functions

Heat transfer fluid circuit (1)

If the pressure in this circuit exceeds the opening pressure for the safety valve (2), the valve opens, releases the overpressure and closes again. The safety valve overflow pipe must have an open connection to the drain and visibly flow into this in a frost-free environment.

Refrigerant circuit (3)

The refrigerant circuit's high pressure side is equipped with a high pressure switch (6) and one or two operating pressure switches (4, 5), only one of which is connected. The connected operating pressure switch stops the compressor when the working pressure is reached, which is when sufficient heat energy has been produced.

If the operating pressure switch does not work and the pressure continues to increase in the circuit, the high pressure switch activates when its break pressure is reached, whereupon the compressor stops and the heat pump's normal operation is blocked.

If the high pressure switch is activated an alarm indicator flashes on the heat pump's control panel and a warning text appears in the display of the control panel. The blocked heat pump is reset by setting the operating mode to

OFF and then back to the previously selected mode.

The low pressure switch (7) stops the compressor and blocks the heat pump's operation if the pressure becomes too low in the cooling circuit's low pressure side.

If the low pressure switch is activated, the heat pump's normal operation is blocked, an alarm indicator on the heat pump's control panel flashes and a warning text appears in the display of the control panel. The blocked heat pump is reset by setting the operating mode to OFF and then back to the previously selected mode.

Brine circuit (8)

If the pressure in this circuit exceeds the opening pressure for the safety valve (9), the valve opens, releases the overpressure and closes again. The safety valve overflow pipe must have an open connection to the drain and visibly flow into this in a frost-free environment.

Compressor

The compressor is equipped with a thermal over current relay to protect it against over current.


If the thermal over current relay (position 1 in the image below) is activated, the heat pump's normal operation is blocked, an alarm indicator on the heat pump's control panel flashes and a warning text appears in the display of the control panel.

The blocked heat pump is reset by setting the operating mode to OFF and then back to the previously selected mode.

The compressor is also equipped with an internal protector that stops the compressor if it risks becoming overheated. The internal protector cannot be reset manually, the compressor must cool before it can be restarted. No alarm connected to this protector.

Circulation pumps

The circulation pumps have internal overload protectors, which are reset automatically after cooling.

The overload protectors in circulation pumps for 10 - 16 kW heat pumps (8 - 12 kW air/water heat pumps) also activate the alarm for motor protection and block the heat pump's normal operation. Indication and resetting occur in the same way as for the compressor.

Alarm mode

If an alarm that affects the heat pump's normal operation is activated this will be indicated in the display window.

In order to further attract attention, the heat pump will not produce hot water.

The heat pump will initially meet the heat demand using the compressor. If this is not possible, the built-in electric heating element engages.

Auxiliary heater, electric heating element

The auxiliary heater consists of an electric heating element mounted on the heating system supply line. It has an overheat protector that switches off the electric heating element if it is at risk of becoming overheated. The overheat protector's control unit is on the electrical panel (position 2 in the image below).

If the overheat protector is activated an alarm indicator flashes on the heat pump's control panel and a warning text appears.

The overheat protector is reset by pushing the reset button (position 3 in the image below).

Electrical system

The heat pump control is fused with fuse F0 (position 4 in the image below).

1


1

2

3

4

Thermal over current relay F11

Overheating protection

Reset button

Fuse F0

2

4

3

Figure 2.

Component location

Technical data

See Technical data for detailed technical specifications.


4 Heat pump data, components

Note! Illustrations of products are not precise drawings and must only be considered as schematic images.

Differences in component parts may occur.

4.1

DHP-H, DHP-H Opti

4

5

6

1

2

3

10

9

8

11

13

12

7

8

Figure 3.

Components

8

9

10

11

6

7

4

5


1

2

3

Water heater, 180 litres

Return pipe sensor, heating system

Evaporator, insulated

Reversing valve

Supply line sensor

Heating system circulation pump

Auxiliary heating, immersion heater

Brine in

Heating system supply line

Brine out

Circulation pump coolant system

19

20

21

15

16

17

18

12

13

14

14

15

16

19

18

17

20

21

Drying filter

Expansion valve

Hot water temperature sensor (displays maximum temperature)

Control panel for control equipment

Electrical panel

Compressor

Low pressure switch

Operating pressure switch


Condenser with primary side drain


4.2

DHP-H Opti Pro

4

5

6

1

7

2

3

8

9

10

11

12

13

Figure 4.

Components

8

9

6

7

3

4

5

10

11

12


1

2




HGW shunt valve

Supply pipe sensor, heating system



Brine out


Brine in


Expansion valve

13

14

18

19

20

21

15

16

17

22

23

14

15

16

19

18

17

20

22

21

23

Drying filter



Electrical panel

Compressor

Low pressure switch




De-superheater

HGW sensor


4.3

DHP-C

2

3

4

1

5

6

12

13

14

15

16

7

8

9

10

Figure 5.

Components


7

8

5

6

3

4

1

2

9

10

11

12




Heat exchanger for cooling operation

Exchange valve cooling

Shunt cooling

Exchange valve, heating/hot water

Supply line sensor



Brine in


17

18

19

11

22

21

20

23

24

21

22

23

24

18

19

20

13

14

15

16

17

Brine out

Circulation pump, brine system

Expansion valve

Drying filter



Electrical panel

Compressor

Low pressure switch





4.4

DHP-L, DHP-L Opti

3

4

1

2

12

7

8

10

9

5

6

11

13

16

15

14

17

Figure 6.

Components


6

7

4

5

8

9

1

2

3

Auxiliary heater, immersion heater on supply line 10

Return pipe, heating system

Reversing valve

11

12




Brine out


Drying filter

17

18

13

14

15

16

Expansion valve


Brine in

Electrical panel

Compressor

Low pressure switch




18


4.5

DHP-L Opti Pro

7

2

1

3

13

6

14

17

18

19

20

8

4

22

11

10

21

15

5

12

16

9

Figure 7.

Components


6

7

4

5

1

2

3

Auxiliary heater, immersion heater on supply line


Supply line water heater

HGW shunt valve



Circulation pump, heating system

8

9

Brine in

Brine out

10 Drying filter

11 Circulation pump, brine system

15

16

17

18

12

13

14

19

20

21

22

Expansion valve


Electrical panel

Compressor

Low pressure switch




De-superheater

HGW sensor



4.6

DHP-A, DHP-A Opti

1

3

13

24

4

9

11

12

Figure 8.

Components


1

2


Defrosting tank

8

9

6

7

3

4

5


Exchange valve, defrosting

Exchange valve, heating system

Supply line sensor




10 Brine in

11 Drying filter

12 Expansion valve

5

2

6

7

8

14

15

16

17

21

19

18

20

22

10

23

13

14

18

19

20

21

15

16

17

22

23

24

Brine out



Electrical panel


Compressor

Low pressure switch

Operating pressure switches




Brine in to defrosting tank during defrosting


4.7

DHP-AL, DHP-AL Opti

Figure 9.

Components


7

8

5

6

9

3

4

1

2

Heating system supply pipe

Brine out to outdoor unit



Electrical panel


Evaporator


Exchange valve, heating system

1

2

3

4

7

9

8

10

11

12

5

6

9 8 7 6 5 4

10

3

2

1

17

16

15

18

14

15

16

17

18

10

11

12

13

Drying filter

Expansion valve

Shunt valve defrosting

Brine in to defrosting tank during defrosting

Condenser

Compressor

Low pressure switch

Operating pressure switches


13

14

8

9

10

11

5

6

7


1

2

3

4

Defrosting tank

Water heater

TWS coil

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

Connection, to TWS coil

Cold water line, 22 mm

Hot water line, 22 mm

Bleed valve, at stainless steel water heater

Connection, brine out, during defrost

Connection, brine from heat pump

Connection, return pipe to heat pump

11


4.8

Outdoor unit DHP-A, DHP-AL, DHP-A Opti, DHP-AL Opti

2

6

3

1

5

4

7 8

Figure 10.

Outdoor unit and connections


3

4

1

2

Outdoor unit

Cover

Front cover

Stand

7

8

5

6

Cover

Connection, brine in to outdoor unit

Connection, brine out from outdoor unit

Connection, drain drip tray


5 Transport, unpacking and setting-up

5.1

Separating the heat pump

Note! Does not apply to DHP-L, DHP-L Opti, DHP-L Opti Pro, DHP-AL, DHP-AL Opti.

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

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

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

3.

4.

1.

2.

Remove the packaging.

Detach the front cover by twisting the catch 90° anti-clockwise, at the same time hold the front cover with one hand.

Tilt the front cover outwards.

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

2

3

4

Figure 11.

The front cover

6.

7.

5.

Carefully pull the switch free from the control panel.

Unscrew the front stay bar and top panel.

Pull the side panels forward and then upwards and outwards to remove them.


6

7

7

Figure 12.

Top panel and side panels

8.

9.

Slacken off the screws that hold the rear panel and remove it.

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

10.

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

•

Supply line (301, 302)

•

Hot water (311, 312)

•

Top sensor (325, 326)

11.

Unscrew the electrical panel’s screws.

12.

Turn the electrical panel through 180 degrees and place it in front of the heat pump.

12

Figure 13.

Electrical panel

13.

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


14.

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

13

14

Figure 14.

Connections

15.

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

Warning! Always use two people for heavy lifting.

16.

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

16

Figure 15.

Separating

17.

Put the unit down carefully on a floor protector.


6 Piping installation

6.1

Information collector pipe

Caution! 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 metres) 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

Figure 16.

Shaft depth for, and insulation of, collector hoses

6.2

Connection of several brine coils

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

For hoses of type PEM DN 32, Ø i

= 28.0:

Table 3.

Maximum coil length, hose type PEM DN 32, Øi = 28.0

DHP-H Opti, DHP-H Opti Pro, DHP-L

Opti, DHP-L Opti Pro

Size

6

8

10

12

16

Calculated maximum coil length per coil, in metres

1 coil

<390

<320

<250

<170

<80

2 coils

<2 x 425

<2 x 345

<2 x 365

<2 x 315

<2 x 200

-

-

-

-

3 coils

<3x 207

-

-

-

-

4 coils

<4 x 225


For hose of type PEM DN 40, Øi = 35.2:

Table 4.


DHP H, DHP-C, DHP-L

Size

6

8

10

12

16


1 coil

<1000

<750

<1000

<700

<220*

-

-

2 coils

-

<2 x 1000

<2 x 444*

-

-

-

-

-

3 coils

-

-

-

-

4 coils

Table 5.



DHP-H Opti, DHP-H Opti Pro, DHP-L

Opti, DHP-L Opti Pro

Size

6

8

10

12

16

1 coil

<1000

<780

<980

<630

<250*

2 coils

-

-

-

<2 x 1000

<2 x 1000

-

-

-

-

-

3 coils

-

-

-

-

-

4 coils

*) When dimensioning size 16, 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 from 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.

1

3


1

2

3

4

Brine coil 1

Brine coil 2

Choke valves

Collection well

2

4

Figure 17.

The collection well for distributing to several brine 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.

6.3

Noise information

6.3.1

Preventative measures

Some of the following points can also be used when troubleshooting.

•

Do not install heat pumps on walls adjoining bedrooms.


•

Ensure that all pipes are elastically suspended, with mountings as illustrated or similar. This is so that the rubber (or similar material) compresses 1 to 2 mm under vibration. It is not recommended to suspend the pipes from too many points, as the force at each mounting is then not sufficient.

Figure 18.

Elastic pipe suspension.

•

If the heat pump is located indoors and the ceiling in the area is unsuitable to suspend the aforementioned pipe mountings, set up (or construct) special stands on the floor from which the pipes can be suspended.

•

Ensure that pipe lines do not lie against walls that they run along and that foam insulation is wrapped around the entire pipe, not just on top of it.

•

Pipes inside the heat pump must not be against each other (if they are, clamp and secure suitable rubber, pulling the pipes apart by hand only helps temporarily).

•

If the heat pump is on an unstable surface, position rubber feet designed for its weight underneath.

•

If necessary, use rubber straps to secure flexible hoses in position, so that they do not lie against each other or create vibration bridges.

•

Ensure that electrical wiring is not put under strain, if it is it creates vibration bridges.

•

If possible, install the heat pump in a location that is sound insulated from areas that are frequented by residents.

Soundproofing measures to carry out afterwards:

•

Go through the aforementioned points and improve if possible.

•

Hood for compressor (most effective for high frequencies).

•

Improve the acoustic environment of the heat pump by installing acoustic panels on the walls and ceiling.

•

In some instances, it is recommended that the heat pump is moved to another area.

6.3.2

Laying cabling

Note! Electrical connection can also cause noise so this installation must be carried out appropriately. An appropriate installation is where there is approximately 300 mm free cable between the heat pump and the building. 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.

Figure 19.

Recommended distance between trunking on the wall and trunking on the heat pump is 300 mm


7 Electrical Installation

7.1

Cable connection

•

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

Figure 20.

Connecting cable to terminal block


8 Installing accessories/additional functions

DANGER! Hazardous electrical voltage! The terminal blocks are live and can be highly dangerous due to the risk of electric shock. All power supplies must be isolated before electrical installation is started.

8.1

Room sensor

The room temperature sensor has a temperature sensor that provides a further value that the control system can use when calculating the supply temperature. The impact of the room sensor in the calculation can be set in the menu HEAT CURVE -> ROOM FACTOR. Default setting for ROOM FACTOR is 2 but can be adjusted from 0 (no impact) to 4 (large impact).

The difference between the desired and actual indoor temperature is multiplied by the set value for ROOM FAC-

TOR. The set point on the heating system’s supply line increases or decreases with the result depending on whether there is a deficit or surplus of heat.

The table below shows examples of how the set point for the supply line is affected at CURVE 40 with different settings for ROOM FACTOR.

In the event of a heating deficit:

0

3

4

1

2

Table 6.

Heating deficit

ROOM FACTOR

20

20

20

20

Desired room temperature, °C

20

18

18

18

18

Actual room temperature,

°C

18

Set point for supply line, °C

40

42

44

46

48

In the event of a surplus of heat the conditions are the opposite:

2

3

4

0

1

Table 7.

Heat surplus

ROOM FACTOR Desired room temperature, °C

20

20

20

20

20

Actual room temperature,

°C

22

22

22

22

22

Set point for supply line, °C

40

38

36

34

32

Note! The room 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


2.

3.

4.

•

Not in a room with alternative heating

Break all power supply to the heat pump.

Remove the front cover from the heat pump.

Route the room sensor’s connecting cable through the opening in the top panel up to the connecting block.

Connect the cable as follows.

5.

303

304

6.

7.

Install the front cover on the heat pump. Switch on the power supply.

Hang a thermometer next to the room sensor.

8.

9.

Calibrate the sensor by holding in both buttons for 15 seconds until the display starts to flash.

Set the actual room temperature that the thermometer shows.

10.

Wait 10 seconds until the display stops flashing.

If the display shows "--" for indoor temperature no indoor temperature has been read.

8.2

EVU function

When connecting between terminal blocks 307 and 308 the EVU (Elektrizitäts Versorgungs Unternehmen) function is achieved. This prevents operation of the heat pump, auxiliary heater and circulation pump for the brine circuit.

The exception is the circulation pump heating circuit which is permitted to run. The text EVU STOP is shown in the display when this function is active.

1.

2.

3.

4.



Route the EVU function’s connecting cable through the opening in the top panel up to the connecting block.

Connect the cable as illustrated below.

5.


307

308

8.3

Tariff control

When connecting between terminal blocks number 307 and 308 over a 10 kohms resistor the tariff control function is active which gives the opportunity of a recurring temporary reduction of the indoor temperature.

The extent of the tariff control is set in the menu INFORMATION -> HEAT CURVE -> REDUCTION.

1.


2.


3.

4.

Route the tariff control function’s connecting cable through the opening in the top panel forward to the connecting block.

Connect the cable as illustrated below.

10 kΩ

307

308

5.



8.4

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.

1

2


1

2

3

Safety valve

Level switch

Floats

3

Figure 21.

Level switch in the expansion tank/bleed tank

•

Connect the flow sensor according to the installation instructions supplied with the accessory .


9 Important parameters

9.1

Heat production - calculating

The indoor temperature is adjusted by changing the heat pump’s heat curve, which is the control system’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 linearly as the outdoor 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.

9.2

CURVE

The control computer shows the value for CURVE by means of a graph in the display. The heat curve can be changed by adjusting the CURVE value. The CURVE value indicates the supply temperature of the water that is wanted to the heating system at an outdoor temperature of 0°C.

1

5 6

2

5

4 0

2 4

2 0 0 -2 0

4

Figure 22.

Graph showing the set value 40 for CURVE.

3

Position

3

4

1

2

5

Description

Temperature (°C)

Maximum setpoint value

Outdoor temperature (°C)

0°C

Set value (standard 40°C).


In the event of outdoor temperatures below 0°C, a higher setpoint value is calculated and in the event of outdoor temperatures greater than 0°C, a lower setpoint value is calculated.

1

5 6

2

4 0

2 4

3

2 0 0 -2 0

Figure 23.

Increasing or reducing the CURVE changes the slope of the curve.

Position

1

2

3

Description

Temperature (°C)

Maximum setpoint value


If the CURVE value is increased, the heat curve will become steeper and if the value is reduced, it will become flatter.

The most energy efficient and cost effective setting is achieved by changing the CURVE value which leads to fewer starts and longer operating times. For a temporary increase or reduction, adjust the ROOM value instead.

9.3

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 as follows:

•

When changing the ROOM value, the angle of the curve on the system's heat curve does not change, 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°C is that an approximate 3°C increase in supply temperature is usually needed to increase the indoor temperature 1°C.


•

When changing the CURVE value, the angle of the curve on the system's heat curve changes.

1

5 6

2

4 0

2 4

3

2 0 0 -2 0

Figure 24.

Changing the ROOM value changes the heat curve upwards or downwards.

Position

1

2

3

Description

Supply temperature (°C)

Maximum supply temperature


The relationship of the supply temperature to the 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 can be used for a temporary raise or drop. For long term increases or reductions of the indoor temperature, the heat curve should be adjusted.

9.4

HEAT STOP

The HEAT STOP 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 one 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 is de-activated.

9.5

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 line temperature must not exceed 45°C. Otherwise the floor might get 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 HEAT STOP needs adjusting upwards for summer heating.

9.6

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.


9.7

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 system uses several parameters.

A heat deficit is needed to start the heat pump, and there are two integral values, A1 (default value = -60), which starts the compressor and A2, (factory set = -600), which starts the auxiliary heater and A3, which starts the external 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 area 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. If the integral value does not reduce but continues to increase the internal additional heat will start when the integral value reaches the set value for A2 and the external value at set value for A3

2 2

1

3

4

5 3

4

5

1 5 6

1 4

11

15

16

1 2

1 0

9

1 3

11

15

1 2

1 0

9

7

8 8

Figure 25.

Starting and stopping heat pump operation based on integral values


12

13

14

8

9

10

11

6

7

4

5

1

2

3

Integral

Heat surplus

INTEGRAL A1

INTEGRAL A2

Heating deficit

Time

Heat pump operation

No operation

Compressor

Internal additional heater

Compressor start (A1)

Auxiliary heater start A2

Aux. heater stop (latest by A1)

Compressor stop (=0)



15

16

INTEGRAL A3

External auxiliary heater

The calculation of the integral value stops during heat stop. The calculation of the integral value stops when heat stop has stopped.

In this example INTEGRAL A3 < INTEGRAL A2. This means that the external addition will be activated earlier than the internal addition. On the condition that these are activated.

9.8

HYSTERESIS

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

2

1

and the calculated supply temperature,

. If the difference is equal to 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

(-60) INTEGRAL A1 or to the stop value (0).

2

9

3

4

8

1

5

6

7

Figure 26.

Conditions for HYSTERESIS to force the integral value to change.

Position

1

2

3

4

7

8

5

6

9

Description

t

1 t

2

Integral

Supply temperature

Time

Compressor stop (0)

Compressor start (-60)

Hysteresis (Δt) ≥ x

Hysteresis (Δt) ≥ x

9.9

DEFR CURVE

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

The calculation is based on 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 for the defrosting curve at an outdoor temperature somewhere along the 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 -20°C for DEFR CURVE -20. The value -20 for DEFR CURVE -20 is the set value for OUTDOOR STOP, so if the value for OUT-

DOOR STOP changes, the numbers behind DEFR CURVE also change.

Factory setting for OUTDOOR STOP is -20°C. At this outdoor temperature, compressor operation is stopped and the additional heater takes over. Generally the value of OUTDOOR STOP does not need 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 display shows the value for DEFR CURVE 0 and DEFR CURVE -20 by means of a graph.

1

0

4

-1 6

2

-3 2

-2 5

3

-1 5 -5 5

Figure 27.

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

3.

4.

1.

2.

Temperature, input brine line

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

Outdoor temperature

Set value for DEFR CURVE -20

The value for OUTDOOR STOP corresponds to the fact 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 will then be produced 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.

1

0

5

-16

2

1.

2.

3.

4.

-32

-25 -15 -5 5

3

4

Figure 28.

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

Temperature, input brine line

Set value for DEFR CURVE 0

Outdoor temperature

Set value for OUTDOOR STOP, -20°C


5.

Adjustable value for DEFR CURVE -20 is 1°C to 8°C lower than OUTDOOR STOP

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.


10 Troubleshooting

10.1

Alarm

In event of alarm this is indicated in the display with the text ALARM and an alarm message, see following table.

For alarms that are not reset automatically acknowledgement is required. Acknowledge the alarm by setting the heat pump to operating mode OFF and then back to the desired operating mode.

Message

HIGH PRESSURE ERROR

LOW PRESSURE ERROR

MOTOR P ERROR

BRINE OUT

BRINEFLOW LOW

AUX. HEATER

OUTDOOR SENSOR

SUPPLY LINE SENSOR

RETURN LINE SENSOR

HOT WATER SENSOR

DEFROST SENSOR

SENSOR COOLING

ERR PHASE SEQ.

HIGH RETURN

Meaning

Tripped high pressure switch. Compressor stopped.

Tripped low pressure switch. Compressor stopped.

Deployed overload relay (overcurrent relay) compressor, deployed overload relay for outdoor unit fan. On certain models alarms from the brine pump or soft starter can also occur. Compressor stopped.

Brine out is less than the set minimum temperature. Compressor stopped. No hot water production.

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

Overheating protection deployed. No auxiliary heater.

Fault in outside sensor. When the control system calculates the heat demand, zero degrees is used.

Supply line sensor error. Everything stops except the heating system’s 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. Heating and hot water production is controlled from the outdoor sensor’s value instead (applies to DHP-A, DHP-A Opti, DHP-AL, DHP-AL Opti).

Sensor fault. Cooling function stops.

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 high return temperature prevents the compressor’s operation.

In event of alarm the heat pump will if possible supply heating to the house, primarily with the compressor, secondarily with the additional heater. Hot water will stop to indicate that something noteworthy has occurred.

10.2

Measurement points

1.

2.

3.

Disconnect the relevant sensor from I/O-card/terminal block.

Measure the resistance for the sensor and any extension cables.

Then measure the sensor only.

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

Note! To ensure the sensor value the actual temperature must be checked against the measured resistance.


10.2.1

Measurement checking sensors during fault tracing ohm, Ω

183

150

124

103

428

343

276

224

86

1884

1443

1115

868

681

538

Table 8.

Outdoor sensor / Defrost sensor

°C

20

25

30

35

0

5

10

15

40

-30

-25

-20

-15

-10

-5

10.3

Check points

Table 10.

Temperatures

Name

Condensing temperature

Evaporation temperature

Superheating

Radiator circuit

Brine circuit

Overheating R407C

Table 11.

Expansion valve factory setting

Name

Danfoss TUBE R404A, 4.2 kW


Danfoss TUBE R404A, 8,4 kW




Values

0.5 – 1.5 °C above supply line temperature

7 - 8 °C lower than incoming brine

4 - 8 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


Table 9.

other sensors

°C kilo ohm, kΩ

50

55

60

65

30

35

40

45

70

75

80

85

0

5

10

15

20

25

8,5

7,1

6,0

5,0

18,0

14,8

12,2

10,1

4,2

3,7

3,1

2,7

66,3

52,4

41,8

33,5

27,1

22,0

Name

Danfoss TUBE R407C, 11.0 kW

Danfoss TUBE R407C, 17,0 kW

Setting


From fully closed position, screw 5,5 turns out

Table 12.

Break pressure switches

Refrigerant

R134a (Only applies to certain models of

DHP-C)

R404A (Only applies to

DHP-A, DHP-AL)

R407C

Pressure switch

Low pressure switch



Low pressure switch

Operating pressure switch A

Operating pressure switch B


Low pressure switch



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

2.85 MPa

3,10 MPa

10.4

Operational problems

The tables in the following section apply to all types of heat pump and collector solutions.

The tables list the most probable and common causes of the problem first. When troubleshooting the cause of a problem start with the first cause and go down the list. There may be more than one way of troubleshooting a cause where the most probable is given first.

10.4.1

Alarm

Table 13.

Problem – Alarm LP (low pressure switch)

Cause Troubleshooting

1. Blocked strainer on the brine circuit. Check that the strainer is not blocked.

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.

5. Cable break or loose cable to low pressure switch.

Listen for air in the heat pump and brine circuit.

Check that the shut-off cock or any other taps are open.

Check:

•

That the circulation pump spins.

•

That the shut-off valves are open.

•

That the strainer is not blocked.

•

That there is no air in the heating system.

•

Check that both cables are connected to 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.

Remedy

Clean the strainer if necessary.

Bleed the brine circuit according to the installation instructions.

Open closed taps.

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, reconnect it.

If there is a cable break, replace the cable.


Cause

6. The low 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.

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.

Remedy

If the low pressure switch opens too soon or is always open, replace it.

•

•

Check the freezing point of the mix using a refractometer.

•

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.

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 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.

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 sealed, replace it.


Cause

14. Blocked evaporator on the water side.

15. Blocked evaporator on the refrigerant side.

Troubleshooting

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 bleed 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

℃, it is probably not blocked.

If the temperature difference is >6°C, the evaporator is probably blocked.


Remedy

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

Table 14.

Problem – Alarm HP (high pressure switch)

Cause

1. Blocked strainer in the heating system.

2. Air in the heating system.

Troubleshooting

Check that the strainer is not blocked.

3. Closed or partially closed thermostats/valves in the heating system.

4. The circulation pump that is defective or has jammed.

5. Shut-off main tap in heating system.

6. Cable break or loose cable to high pressure switch.

•

Listen for air in the heat pump and heating system.

Bleed the heating system 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?

In the control system’s manual test menu check that the circulation pump is active.

Check that the main tap is open.

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 Opti).

If there is no voltage to the circulation pump, check if there is voltage from the

I/O card, see wiring diagram. If there is voltage from the I/O card, check the components between the I/O card and the circulation pump.

If a component is defective, replace it.

Open closed main tap.

Check that both cables are connected to 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.

Remedy


If a cable has come loose, reconnect it.

If there is a cable break, replace the cable.


Cause

7. The high pressure switch does not open.

8. The high 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.

11. Large pressure drop in the heating system.

12. Overfilled refrigerant circuit.

Troubleshooting

•

Incorrect pressure switch installed.

Same or higher break pressure than the high pressure switch. See marking.

•

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.

Remedy

If the high pressure switch does not open, replace it.

If the high pressure switch opens too soon or is always open, replace it.

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 nonreturn valve’s opening pressure.

•

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.

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.

If the non-return valve has too great an opening pressure, replace it.

If necessary, clean/flush the heating system.


If there is not sufficient pressure equipment, the heating system can be adjusted according to the system solution for large pressure drop.



If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action.


Cause

13. Blocked condenser on the water side.

14. Blocked condenser on the refrigerant side.

Troubleshooting

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 pressure pipe becomes hot and that the circulation pumps work (for circ.pumps with a bleed 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.


Remedy

If the condenser is thought to be blocked, try flushing it. If this does not work, it must be replaced

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

Table 15.

Problem – Alarm MS (motor protection)

Cause

1. Phase drop or blown fuse.

2. Defective soft-starter (three-phase heat pump).

3. Defective soft-starter ( single phase heat pump).

4. Defective or incorrectly set motor protection.

5. Cable break.

Troubleshooting Remedy

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 I/O card 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.

Check measure and establish that when the I/O card gives a signal (there must be voltage between ON and N on the softstarter), the soft-starter releases the phases to the compressor.

Use a hook-on meter to establish when the motor protection deploys, check what the motor protection is set to.

Compare with the table. For three phase heat pumps all three phases must be supplied.

Check the supply to the motor protection, soft-starter or compressor.

If any of the phases are missing, 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

I/O card, replace it.

If the soft-starter does not release the phases when it receives signals from the

I/O card and does not alarm as below, 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.



6. Defective compressor (applies to 3phase heat pumps).

Measurement check the voltage on the three phases (each to zero) at the compressor. There must not be any large deviation between the phases. If measurement checking the winding’s resistance the same value must be on all three windings.

7. Alarm from the overload protection on the brine pump (only certain heat pump models).

Switch the heat pump off and on. If the alarm remains check the WSK switch in the brine pump.

8. Alarm from single phase soft starter. Check the fault cause using the soft start

LEDs.

Remedy

If the compressor is defective, replace it.

If the brine pump is defective, replace it.

Table 16.

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 Measurement points.

•

If the read off value does not correspond with the table, only measure the sensor and check the ohm table in Measurement points.

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.

Table 17.

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 pressure pipe temperature by feeling the pressure pipe. If the phases are correctly sequenced it should be hot (not just warm) even a distance from the compressor.

•

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.


Table 18.

Problem – Alarm AH (auxiliary heat)

Cause

1. The overheating protection has tripped.

2. Phase drop.

The alarm occurs when 230 V is not registered between L2 on the circuit board and N.

3. Overheating protection fault, cannot be reset.

4. Flow sensor fault.

5. No or insufficient circulation in the heating system.

6. The submersible tube in the electric heating element is against the coils.

Troubleshooting

Check if the overheating protection has tripped.

•

Check if the overheating protection has tripped.

•

Check if any cables at the circuit board or overheating protection are loose or damaged.

Press the reset button, measurement check for 230 V on the incoming and outgoing connections.

Check what the flow sensor shows. Is it a plausible/actual value?

Measure the resistance of the sensor, check against the ohm table in Measurement points.

Check:

•

That the circulation pump spins

•

That the shut-off valves are open.

•

That the strainer is not blocked.

•

That there is no air in the heating system.

Check what the flow temperature is when the overheating protection trips.

This normally trips at 95°C.

Remedy

If the overheating protection has tripped, reset it.

If the overheating protection has tripped, reset it.

If the cables are loose or 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.

Table 19.

Problem – Alarm Brine out

Cause

1. Defective sensor.

2. Brine temperature too low.

Troubleshooting

Check what the sensor shows. Is it a plausible/actual value?


Check the set value on ALARM BRINE in the heat pump’s control computer.

Remedy


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.


Table 20.

Problem – Alarm Brine flow low

Cause

1. Incorrect system selected in the control system.

If the system does not contain a flow sensor but the control system is set for the system with flow sensor, this alarm occurs.

2. Insufficient flow.

Troubleshooting

In the menu SYSTEM, check which system is selected.

•

Check whether the ground water pump is running.

•

Check the flow sensor.

•

Calibration/setting the flow sensor.

•

Blocked exchanger?

Remedy

If the incorrect system is selected, change it.

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.

Table 21.

Problem – Alarm brine pump

Cause

The brine pump’s integrated alarm has deployed. (Only applies Opti)

Troubleshooting

•

Air in the brine pump?

•

Has the brine pump jammed?

Remedy

Bleed the brine circuit according to the installation instructions.

If the brine pump has jammed, there is an integrated shake function that attempts to shake itself loose up to a maximum of 5 times, if it does not manage this, an alarm will occur.

Try cutting the voltage to the heat pump to stop the alarm and then manually run the brine pump.

If the alarm recurs, repeat the procedure several times. If this does not help, replace the brine pump.

Table 22.

Problem – Alarm circulation pump

Cause

The circulation pump’s integrated alarm has deployed. (Only applies

Opti)

Troubleshooting

•

Air in the circulation pump?

•

Has the circulation pump jammed?

Remedy

Air in the brine circuit. See the installation instructions for information on how to perform filling.

If the circulation pump has jammed, there is an integrated shake function that attempts to shake itself loose up to a maximum of 5 times, if it does not succeed, an alarm will occur.

Try cutting the voltage to the heat pump to stop the alarm and then manually run the circulation pump.

If the alarm recurs, repeat the procedure several times. If this does not help, replace the circulation pump.


Table 23.

Problem – Operating pressure switch open alternatively high hot gas temperature

Cause

1. Operating pressure switch, function.

2. Sensor fault.

3. Hot gas temperature too high.

4. Overheating too high.



1.

2.

Switch off the main switch for the heat pump, wait until the compressor has been stationary for at least 15 minutes.

Disconnect the two cables on the pressure switch, using a buzzer check if the pressure switch is closed.

If the pressure switch is closed, bridge the pressure switch cables temporarily and switch on the voltage to the heat pump again. If there is an indication 0

(zero) 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 use a buzzer test to see if it has closed again.

Replace the pressure switch if it appears to jam repeatedly.


Check what the sensor shows. Is it a plausible/actual value?


Check the set value on PRESS. PIPE in the heat pump’s control computer (factory setting 140

℃)

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.


The square symbol appears when the delivery pipe temperature is as high or greater than the set value for DELIVERY

PIPE.


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.


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.

10.4.2

Leakage

Table 24.

Problem – Leak fluid side

Cause

1. Insufficiently tightened connections.

Troubleshooting

Locate the leak.

2. Cracked nut or connection.

3. Defective gasket or O-ring.

Locate the leak.

Locate the leak.

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.


Cause

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.

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.

Troubleshooting

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.

Check that condensation drain is installed and correctly connected.

Establish where the condensation is coming from.

Locate the leak.

Remedy

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.

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.

9. Leak at the condenser’s drain cock. 1.

2.

Check that the valve is completely closed.

Check that the sealed cover is sealed.

Check that it is completely closed.

10. Leak at the condenser’s bleed valve.

11. Leak at soldered joint on water heater.

12. Associated leak on the water heater.

Locate the leak.

13. Associated leakage in the condenser.

14. Anti-freeze is forced out of the safety valve on the expansion tank

(brine system).

•

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 at the 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.


10.4.3

Noise

Table 25.

Problem – Noise problem in the radiator system

Cause

5. Circulation noise (whistling noise in the heating system).

Troubleshooting

1. Flexible hoses missing.

Flexible hoses must be installed according to the instructions.

2. Incorrectly installed flexible hoses.

Flexible hoses must be installed according to the instructions.

3. Installing/suspending pipes.

Check if the mountings are too rigid, right type, right sizes and/or installed too close together.

4. Clicking.

•

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?

Table 26.

Problem – Loud compressor noise

Cause

1. Phase drop.

The compressor attempts to start or operates on two phases (only applies to 3 phase heat pumps) .

2. Touching pipes – vibrations.

3. Compressor fault.

Troubleshooting

1.

2.

Check that there is 400 V between incoming phases on the heat pump.

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.


Table 27.

Problem – Shrieking, whistling noise


1. Whistling expansion valve.

1.

2.

3.

Take overheating readings, adjust to the recommended value.

Open and close the valve fully in and out.

Adjust the expansion valve to recommended overheating value again.

2. Noise from the soft-starter.

Measurement check the input and output phases for the soft-starter as well as the control signals from the I/O card (see wiring diagram).

3. The compressor’s IPR valve opens.

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 sides 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 sides.

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 too low a pressure, replace the compressor.

Table 28.

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.

4. General noise problems


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.

Prevent the protection sleeve vibrating by using insulation tape for example.

Carry out according to the installation instructions.

Check that the heat pump is level by using a spirit level.

Check that the heat pump is supported by all four feet.

Carry out preventative measures. See

Installation instructions.

If the heat pump is not level, adjust using the feet.

Example:

•

Improve the acoustic environment in the area where the heat pump in located by installing acoustic panels on the walls and ceiling.

•

Install a hood on the compressor

(most effective for high frequencies).


10.4.4

Hot-water

Table 29.

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

3. Air in TWS coil or water outer jacket.

During hot water production:

•

Listen for air.

•

Check the temperature difference between supply and return line.

4. Start temperature set too high for hot water production.

Check that the start temperature is correctly set. Should not be set above the factory set value.

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.

How large is the requirement and what is the capacity of the heater?

8. The operating pressure switch opens too soon (at too low a pressure).

Hot water production ends when the operating pressure switch opens.

Check the break pressure using manometer apparatus.

Remedy

If the motor is defective, replace it.

If the insert jams, remove and clean it, or replace it.

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?


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 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 DWH 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).


Cause

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.


Is the exchange surface too small?

Can the heater cope with the heat pump’s output?

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.

10.4.5

Heating comfort

Table 30.

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/SUP-

PLY LINE/RETURN LINE.

Troubleshooting

Check the ROOM and CURVE and MAX settings.

Check which operating mode is set.

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.

Check what the relevant sensor shows. Is it a plausible/actual value?




Cause

4. The 3-way valve has jammed in hot water mode.

5. Defective electric heating element.

6. The heat pump has stopped on HIGH

RETURN.

7. Heat production is stopped by the

HYSTERESIS function.

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

MAX STEP 4 = 12 kW (only DHP A)

MAX STEP 5 = 15 kW (only DHP A)

MAX STEP +4 = 12 kW (only DHP A)

MAX STEP +5 = 15 kW (only DHP A)

Troubleshooting

1.

2.

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

1.

2.

Is the motor being supplied with voltage according to the wiring diagram in both operating instances?

MANUAL TEST – REV.V. 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.

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.


Use a buzzer and check if all coils in the electric heating element are intact.

•

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 19.3.

If the flow temperature rises as soon as heat production is stopped by HYSTERE-

SIS 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?

Check the set value on MAXSTEP in the heat pump’s control computer.

•

Try increasing the hysteresis value until the heat pump stops on INTE-

GRAL 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 (the heat emitting surface increased).

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

MAX STEP 4 = 12 kW (only DHP A, cannot cut in when the compressor is running.)

MAX STEP 5 = 15 kW (only DHP A, cannot cut in when the compressor is running.)

MAX STEP +4 = 12 kW (only DHP A, can cut in when the compressor is running.)

MAX STEP +5 = 15 kW (only DHP A, can cut in when the compressor is running.)



9. The external auxiliary heater does not start when the heat pump’s control computer requests it.

If an external auxiliary heater is used, check that it is correctly installed by test running it in MANUAL TEST – AUX.

HEATER - 1.

If it does not start at manual test operation, check that the start signal/voltage comes from the heat pump. See wiring diagram.

10. Closed or partially closed thermostats/valves in the heating system.

Check that the thermostats/valves in the heating system are open.

11. The total output of the heat pump and auxiliary heater is too low in relation to the building’s power demand.

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?

12. Under dimensioned heating system. 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?

13. Changed conditions

Have you increased your heating and/or hot water demand?

•

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 system solution 1).

Remedy

Connect the external auxiliary heater according to the instructions.

Measure the voltage on the I/O card’s probe L2 Oil/Electricity.


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.

Table 31.

Problem – Too hot

Cause


Troubleshooting

Check the ROOM and CURVE and MIN settings.

2. Sensor fault, OUTDOOR/ROOM/SUP-

PLY LINE.

Check what the relevant sensor shows. Is it a plausible/actual value?


Remedy


ROOM = Desired indoor temperature.


MIN = Lowest set-point value on the supply line regardless of the outdoor temperature.



Cause

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.


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.

Is the motor being supplied with voltage according to the wiring diagram in both operating instances?

MANUAL TEST – REV.V. HOT WATER

0=Radiator mode, arm out from the 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.

Table 32.

Problem – Irregular indoor temperature

Cause


Troubleshooting

Check the ROOM and CURVE, MIN, MAX

CURVE5, CURVE0, CURVE-5 and HEAT

STOP settings.

2. Incorrectly positioned/installed sensors.

Check that outdoor sensors and any room sensors are installed according to the instructions and that they are calibrated.

Remedy


ROOM = Desired indoor 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.

HEAT STOP = 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.


10.4.6

Other

Table 33.

Problem – The heat pump runs and runs but never stops

Cause

1. Air in the heating 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.


•


•

If hot water consumption increases, a larger proportion of time is used to produce hot water, which means less time for heat production.

Remedy

Bleed the heating system according to the installation instructions.




Table 34.

Problem – Runs on electric heating element

Cause

1. Operating mode AUX. HEATER 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 (anti-legionella function) is running.

5. The heat pump has stopped on

HIGH RETURN.


•

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 system.

If AUX. HEATER 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 Operational problems.

Check if the heat pump runs peak heat. See the instructions for the relevant model.


•

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 Measurement points.

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(missing heading target)for more 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 must then stop and the stop temperature be reached with only the auxiliary heater connected. Take no corrective action.




Cause

6. The compressor runs backwards.

The incoming phases have the incorrect sequence (only applies to 3phase 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 system requesting auxiliary heating.


Troubleshooting

•


•


•


•


•


Remedy



Table 35.

Problem – The auxiliary heater is in operation but not the compressor

Cause

1. Operating mode AUX. HEATER is selected.

2. Peak heat operation (anti-legionella function) is running.


4. The heat pump has stopped on high return.

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.


•

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.

•

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 Mätpunkter.

Remedy

If AUX. HEATER 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 must then stop and the stop temperature be reached with only the auxiliary heater connected. Take no corrective action, this is normal.


See Alarm.

•


•



Cause

5. The compressor has been stopped by the operating pressure switch or delivery line sensor.

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 system requesting auxiliary heating.

Troubleshooting

Check if a square appears in the display’s lower left 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 pressure pipe sensor value is read off from the control system in the HEAT PUMP menu. Is it a plausible/actual value? If not, take a resistance reading from the sensor and check against the ohm table in Mätpunkter.

•

The compressor has been stopped by the delivery line sensor and you have established that it shows the correct temperature. This may have been caused by a leak in the refrigerant circuit.

Check if the heat pump’s control computer indicates that the compressor is in operation, and if there is voltage in the soft-starter control inputs. Then read off and check that there is voltage on the compressor’s electrical connection(s).

•


•


•


Remedy

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 line sensor is defective, replace it. If the delivery line 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 line temperature is. If the problem persists, replace the compressor.

If there is voltage on the compressor’s electrical connection(s) 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.


Table 36.

Problem – The heat pump consumes too much energy

Cause

1. Blocked strainer in the heating system.


3. Incorrect flow over hot side of the heat pump.

4. Incorrect flow in the brine circuit.

Troubleshooting

Check that the strainer is not blocked.

Remedy



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.

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.


See the Operational problem – Alarm.

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.


Cause


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.

Troubleshooting

Check the ROOM and CURVE and MIN settings.

Check the specified interval for peak heat operation in the control computer, see instructions for relevant model.

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 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.

7. The heat pump has stopped on

HIGH RETURN.

8. The compressor runs backwards.

The incoming phases have the incorrect sequence (only applies to 3phase 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.

•


•

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 Mätpunkter.

•


•


•




Cause

9. The compressor has been stopped by the operating pressure switch or delivery line sensor.

10. Expansion valve defective or incorrectly set.


12. Overfilled refrigerant circuit.



Troubleshooting

Check if a square appears in the display’s lower left 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 line sensor value is read off from the control computer in the

HEAT PUMP 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 line sensor and you have established that it shows the correct temperature. This may have been caused by a leak in the refrigerant circuit.

Remedy

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 line sensor is defective, replace it. If the delivery line 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 line temperature is. If the problem persists, replace the compressor.

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.



•


•


•


•

If hot water consumption increases, a larger proportion of time is used to produce hot water, which means less time for heat production.


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.






Table 37.

Problem – Auxiliary heater cuts in too soon

Cause




4. Collector too long, pressure drop too great.



Check the ROOM, CURVE, INTEGRAL A1 and

INTEGRAL A2 settings

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.




•


•


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 a longer collector is being used than recommended for the specific heat pump, it must be divided on several parallel connected coils.


Table 38.

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.


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 quickly drop in temperature (supply) in order 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.

Adjust ROOM and CURVE if necessary.

Ensure that there is sufficient flow over the condenser and the heating circuit.


Table 39.

Problem – Connection of external AH


Incorrectly connected auxiliary heater.

Does not start when the control computer gives the signal.

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.

10.4.7

Outdoor section (Applies to DHP-A)

Table 40.

Problem – Noise/loud noise

Cause

1. Positioning the outdoor unit.

Troubleshooting

Determine whether the outdoor unit can be moved to a more suitable location.

2. Connection/wall lead-ins.

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” away.

Rigid mountings can generate noise from the outdoor section via walls in the house.

Table 41.

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.

Table 42.

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 nowhere 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.


Table 43.

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.


11 Technical data, DHP-H

Table 44.

Technical data

DHP-H

Type

Refrigerant

Compressor

Electrical data

3-N, ~50 Hz

Electrical data

1-N, ~50 Hz

4 6 8 10 12 16

Type

Amount kg

Test pressurisation MPa

Design pressure

Type

MPa

0,75

Oil

Mains power supply V kW 2,7 Rated output, compressor

Rated output, circulation pumps kW 0,2 kW Auxiliary heater, 3 step

Start current 3

Fuse

A

A

17

16 9

16 6

/10 4 /10 5 /

1,20

3,0

0,2

12

10

6

4 /16 5 /20

1,30

3,2

0,2

10

16

6

4

Brine/water

R407C

3,4

1,45

3,1

Scroll

/16 5

POE

400

4,2

0,5

3/6/9

/20

18

16

6

4 /16 5 /20

1,55

5,0

0,5

17

16

6

4 /20 5 /25

2,00

7,2

0,6

18

20

Mains power supply V

Rated output, compressor

230 kW 2,7 kW 0,2 Rated output, circulation pumps

Auxiliary heater, 3 step kW 1,5/3,0/4,5

Start current

3

Fuse

A

A

17

20 4 /25 5 /32 6

230

3,2

0,2

11

230

3,6

21

230

4,5

0,5

26

32

6

4 /40 5 /50

230

5,5

0,5

28

32

6

4 /40 5 /50

*

1,5/3,0/4,5 1,5/3,0/4,5 1,5/3,0/4,5 1,5/3,0/4,5 *

25

6

4 /32 5 /40

0,2

25 4 /32 5 /40

6

*

*

*

*

4 /20 5 /25 6

Performance 10 Heat factor 1

COP

1

Heat factor 2

COP 2

Nominal flow

8

Incoming power

1

Cooling circuit

Heating circuit

External available pressure 7

Cooling circuit

Max/Min temperature

Heating circuit

Cooling circuit

Pressure switches

Heating circuit

Low pressure

Operation

High pressure

Water volume Water heater

Condenser kW 3,52

3,90 kW 3,42

3,05 kW 0,9 l/s l/s

0,20

0,09 kPa 38 l l

MPa

MPa kPa 51

°C

°C

MPa

0,8

5,33

4.04

5,38

3,41

1,3

0,36

0,14

35

48

1,6

7,51

4,34

7,40

3,57

1,7

0,49

0,19

32

44

1,9

39

20/-10

55/20

0,08

2,85

3,10

180

2,1

2,2

0,62

0,24

76

9,40

4,24

9,24

3,51

11,0

4,20

10,6

3,39

2,6

0,71

0,28

69

58

2,1

16,4

3,99

15,6

3,19

4,1

1,02

0,39

37

54

2,9


DHP-H

Antifreeze

Number of units

Dimensions L x

W x H

Weight empty

Weight filled

Sound power level

11

Evaporator

De-superheater l l

4

0,7

* mm kg kg

) dB(A

225

405

46

6

0,7

*

229

409

47

8 10

1,2

*

1,6

*

Ethylene glycol/ Ethanol

1

690x596x1845

229

409

44

229

409

46

12

1,6

*

238

418

48

16

2,2

*

242

422

57

Measurements have been carried out on a limited number of circulation pumps, which can give variations in results. Tolerances in the measurement methods can also give variations.

1) At B0W35 according to EN14511 (including circulation pumps).


3) According to IEC61000.

4) Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).

5) Heat pump with 6 kW auxiliary heater (1-N 3 kW).


7) The pressure that must not be exceeded outside the heat pump without falling below the nominal flow. For the cooling circuit, these valves require pipe dimension Ø 40 x 2.4.

8) Nominal flow: Heat circuit Δ10 K, cooling circuit Δ3 K.

9) Fuse phase L1 (size 4 has 1-phase compressor).

10) The values apply to new heat pumps with clean heat exchangers.

11) Sound power level measured according to EN ISO 3741 at BOW45 (EN 12102).

*) Not available for this version


12 Technical data; DHP-H Opti

Table 45.

Technical data

DHP-H Opti 6 8 10 12 16

Type

Refrigerant

Compressor

Electrical data

3-N, ~50 Hz

Type

Amount

Test pressurisation

Design pressure

Type kg

MPa

MPa

1,2 1,35

Brine/water

R407C

1,45 1,55

3,4

3,1

Scroll

2,00

Oil



Start current 3

Fuse

A

A

12

10 4 /16 5 /20 6

3,2

0,1

10

16 4 /16 5 /20 6

4,2

0,2

18

16 4 /16

POE

400

3/6/9

5 /20 6

5,0

0,2

17

16 4 /20 5 /25 6

7,2

0,5

18

20 4 /20 5 /25 6

Electrical data

1-N, ~50 Hz

Performance 10

Nominal flow

8 Cooling circuit

Heating circuit


Cooling circuit

Max/Min temperature

Heating circuit

Cooling circuit

Heating circuit

Pressure switches Low pressure

Water volume

Operation

High pressure

Water heater

Condenser

Evaporator

De-superheater

Antifreeze





230

3,6

0,1

1,5/3,0/4,5

230

4,5

0,2

1,5/3,0/4,5

230

5,5

0,2

1,5/3,0/4,5

*

*

*

*

Start current

3

Fuse

Heat factor 1

COP

1

Heat factor

2

A

A kW 5,33 kW

11

25

4

/32

5

/40

6

4.04

5,38

21

25

4

/32

5

/40

6

7,51

4,34

7,40

26

32

4

/40

5

/50

6

9,40

4,24

9,24

28

32

4

/40

5

/50

6

11,0

4,20

10,6

*

*

16,4

3,99

15,6

COP 2

Incoming power 1

3,41 kW 1,3

3,57

1,7

3,51

2,2

3,39

2,6

3,19

4,1 l l l l l/s l/s

MPa

MPa

0,36

0,14 kPa 37 kPa 63

°C

°C

MPa

1,6

0,7

*

0,48

0,19

42

60

1,9

1,2

*

0,62

0,24

63

56

0,71

0,28

45

58

20/-10

55/20

0,08

2,85

3,10

180

2,1 2,1

1,6

*

1,6

*


1,02

0,39

52

96

2,9

2,2

*


DHP-H Opti

Number of units

Dimensions L x W x

H

Weight empty

Weight filled

Sound power level

11

6

mm kg 229 kg 409 dB(

A)

47

8

229

409

44

10

229

409

46

12

1

690x596x1845

238

418

48

16

242

422

57















13 Technical data; DHP-H Opti Pro

Table 46.

Technical data

DHP-H Opti Pro 6 8 10 12 16

Type

Refrigerant

Compressor

Electrical data

3-N, ~50 Hz

Type

Amount

Test pressurisation

Design pressure

Type kg

MPa

MPa

1,15 1,35

Brine/water

R407C

1,40 1,55

3,4

3,1

Scroll

1,70

Oil



Start current 3

Fuse

A

A

12

10 4 /16 5 /20 6

3,2

0,1

10

16 4 /16 5 /20 6

4,2

0,2

18

16 4

POE

400

3/6/9

/16 5 /20 6

5,0

0,2

17

16 4 /20 5 /25 6

7,2

0,5

18

20 4 /20 5 /25 6

Electrical data

1-N, ~50 Hz

Performance 10

Nominal flow

8 Cooling circuit

Heating circuit


Cooling circuit

Max/Min temperature

Heating circuit

Cooling circuit

Heating circuit


Water volume

Operation

High pressure

Water heater

Condenser

Evaporator

De-superheater

Antifreeze





230

3,6

0,1

1,5/3,0/4,5

230

4,5

0,2

1,5/3,0/4,5

230

5,5

0,2

1,5/3,0/4,5

*

*

*

*

Start current

3

Fuse

Heat factor 1

COP

1

Heat factor

2

A

A kW

11

25

4

/32

5

/40

6 kW 5,33

4.04

5,38

21

25

4

/32

5

/40

6

7,51

4,34

7,40

26

32

4

/40

5

/50

6

9,40

4,24

9,24

28

32

4

/40

5

/50

6

11,0

4,20

10,6

*

*

16,4

3,99

15,6

COP 2

Incoming power 1

3,41 kW 1,3

3,57

1,7

3,51

2,2

3,39

2,6

3,19

4,1 l l l l l/s l/s

MPa

MPa

0,36

0,14 kPa 37 kPa 63

°C

°C

MPa

1,6

0,7

0,48

0,19

42

60

1,9

1,2

0,62

0,24

63

56

0,71

0,28

45

58

20/-10

55/20

0,08

2,85

3,10

180

2,1 2,1

1,6 1,6

0,2


1,02

0,39

52

96

2,9

2,2


DHP-H Opti Pro

Number of units

Dimensions L x W x

H

Weight empty

Weight filled

Sound power level

11

6

mm kg 231 kg 411 dB(A) 45

8

231

411

42

10

231

411

45

12

1

690x596x1845

240

420

49

16

244

424

50















14 Technical data, DHP-L

Table 47.

Technical data

DHP-L

Type

Refrigerant

Compressor

Electrical data

3-N, ~50 Hz

Type

Amount kg


Design pressure

Type

MPa

Oil

Mains power supply V kW Rated output, compressor

Rated output, circulation pumps kW kW Auxiliary heater, 3 step

Start current 3

Fuse

A

A

Electrical data

1-N, ~50 Hz


Rated output, compressor kW kW Rated output, circulation pumps

Auxiliary heater, 3 step kW

Start current

3

Fuse

A

A

4

0,75

2,7

0,2

17

20 4 /25 5 /32 6

6

1,20

3,0

0,2

8

Brine/water

R407C

1,30 1,45

3,4

3,1

Scroll

POE

400

3,2 4,2

0,2

3/6/9

10

0,5

12

1,55

5,0

0,5

17 12

16 9 /10 4 /10 5 /16

6

10 4 /16 5 /20

6

10

16 4 /16 5 /20

6

18

16 4 /16 5 /20

6

230

2,7

230

3,2

230

3,6

230

4,5

17

16 4 /20 5 /25

6

230

5,5

18

*

*

20 4 /20 5 /2

5 6

0,2

1,5/3,0/4,5

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

1,5/3,0/4,5 1,5/3,0/4,5 1,5/3,0/4,5 1,5/3,0/4,5 *

16

2,00

7,2

0,6

*


COP

1

Heat factor 2

COP 2

Nominal flow

8

Incoming power

1

Cooling circuit

Heating circuit


Cooling circuit

Max/Min temperature

Heating circuit

Cooling circuit

Pressure switches

Heating circuit

Low pressure

Operation

High pressure


Condenser kW kW l l

MPa

MPa kPa

°C

°C

MPa kW l/s l/s kPa

*

0,8

3,52

3,90

3,42

3,05

0,9

0,20

0,09

38

51

11

25 4 /32 5 /40

6

21

25 4 /32 5 /40

6

26

32 4 /40 5 /50

6

28

32 4 /40 5 /50

6

*

*

5,33

4,04

5,38

3,41

1,3

0,36

0,14

35

48

*

1,6

7,51

4,34

7,40

3,57

1,7

0,49

0,19

32

44

*

1,9

20/-10

55/20

0,08

2,85

3,10

2,2

0,62

0,24

76

39

*

2,1

9,40

4,24

9,24

3,51

11,0

4,20

10,6

3,39

2,6

0,71

0,28

69

58

*

2,1

16,4

3,99

15,6

3,19

4,1

1,02

0,39

37

54

*

2,9


DHP-L

Antifreeze

Number of units

Dimensions L x

W x H

Weight empty

Weight filled

Sound power level

11

Evaporator

De-superheater l l

4

0,7

* mm kg kg

140

145 dB(A) 46

6

0,7

*

145

151

44

8 10

1,2

*

1,6

*


1

690x596x1538

150

157

44

155

162

47

12

1,6

*

165

172

48

16

2,2

*

175

184

50















15 Technical data, DHP-L Opti

Table 48.

Technical data

6 8 10 12 16

DHP-L Opti

Type

Refrigerant

Compressor

Electrical data

3-N, ~50 Hz

Electrical data

1-N, ~50 Hz

Performance

10

Heat factor

1

COP 1

Heat factor 2

Nominal flow 8

Incoming power 1

Cooling circuit

External available pressure

7

Heating circuit

Cooling circuit

Max/Min temperature

Heating circuit

Cooling circuit

Heating circuit


Operation

High pressure

Water volume

COP

2

Water heater

Condenser

Evaporator

De-superheater

Type

Amount

Test pressurisation kg

MPa

Design pressure

Type

MPa

Oil


1,20 kW 3,0 Rated output, compressor

Rated output, circulation pumps

Auxiliary heater, 3 step kW kW

0,1

Start current 3

A 12

1,35

3,2

0,1

10

4,2

0,2

18

Brine/water

1,45

R407C

3,4

3,1

Scroll

POE

400

3/6/9

1,55

5,0

0,2

17

2,00

7,2

0,5

18

Fuse A

10

4

/16

5

/20

6




Auxiliary heater, 3 step

Start current 3

Fuse kW

A

A

1,5/3,0/4,5

11

25 4 /32 5 /40 6

16

4

230

3,6

0,1

1,5/3,0/4,5

21

25 4

/16

/32

5

5

/20

/40

6

6

16

4

230

4,5

0,2

1,5/3,0/4,5

26

32 4

/16

5

/40 5

/20

/50

6

6

16

230

5,5

0,2

1,5/3,0/4,5

28

32

4

4

/20

/40

5

5

/25

/50

6

6

20

4

/20

5

/25

6

*

*

*

*

*

* kW 5,33

4.04

kW 5,38

7,51

4,34

7,40

9,40

4,24

9,24

11,0

4,20

10,6

16,4

3,99

15,6 l l l l kW l/s

3,41

1,3

0,36 l/s 0,14 kPa 37 kPa 63

°C

°C

MPa

MPa

MPa

*

1,6

0,7

*

3,57

1,7

0,48

0,19

42

60

*

1,9

1,2

*

3,51

2,2

0,62

0,24

63

56

*

2,1

1,6

*

20/-10

55/20

0,08

2,85

3,10

3,39

2,6

0,71

0,28

45

58

*

2,1

1,6

*

3,19

4,1

1,02

0,39

52

96

*

2,9

2,2

*


6 8 10 12 16

DHP-L Opti

Antifreeze

Number of units

Dimensions L x W x

H

Weight empty

Weight filled

Sound power level

11 mm kg kg

145

151 dB(A) 44

150

157

44


1

690x596x1538

155

162

47

165

172

48

175

184

50















16 Technical data; DHP-L Opti Pro

Table 49.

Technical data

DHP-L Opti Pro

Type

Refrigerant

Compressor

Electrical data

3-N, ~50 Hz

Type

Amount

Test pressurisation

Design pressure

Type

Oil

Mains power supply


Rated output, circulation pumps

V kW kW


Start current 3

A

Fuse A kg

MPa

MPa

6

1,15

3,0

0,1

Electrical data

1-N, ~50 Hz

Performance 10

Nominal flow

8


Max/Min temperature

Pressure switches

Water volume

Mains power supply


V kW

Rated output, circulation pumps kW


Start current

3

Fuse

A

A kW

Heat factor 1

COP

1

Heat factor

2

COP 2

Incoming power

1

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit

Low pressure kW kW

Operation

High pressure

Water heater

Condenser

Evaporator

De-superheater l l l l

MPa

MPa l/s l/s kPa kPa

°C

°C

MPa

Antifreeze

Number of units


8

1,35

3,2

0,1

10

Brine/water

R407C

1,40

3,4

3,1

Scroll

POE

400

4,2

12

1,55

5,0

0,2 0,2

16

1,70

7,2

0,5

3/6/9

12 10 18 17 18

10 4 /16 5 /20 6 16 4 /16 5 /20 6 16 4 /16 5 /20 6 16 4 /20 5 /25 6 20 4 /20 5 /25

6

230

3,2

230

3,6

230

4,5

230

5,5

*

*

0,1 0,1 0,2 0,2 *

4,04

5,38

3,41

1,3

0,36

0,14

37

63

1,5/3,0/4,5 1,5/3,0/4,5 1,5/3,0/4,5 1,5/3,0/4,5 *

11 21 26 28 *

25 4 /32 5 /40 6 25 4 /32 5 /40 6 32 4 /40 5 /50 6 32 4 /40 5 /50 6

*

5,33 7,51 9,40 11,0 16,4

1,6

0,7

4,34

7,40

3,57

1,7

0,48

0,19

42

60

1,9

1,2

4,24

9,24

3,51

2,2

0,62

0,24

63

56

20/-10

55/20

0,08

4,20

10,6

3,39

2,6

0,71

0,28

45

58

2,85

3,10

*

2,1 2,1

1,6 1,6

0,2


1

3,99

15,6

3,19

4,1

1,02

0,39

52

96

2,9

2,2

DHP-L Opti Pro

Dimensions L x W x

H

Weight empty

Weight filled

Sound power level

11

6

mm kg kg

150

156 dB(A) 45

8

155

162

42

10

690x596x1538

160

167

45

12

170

177

49

16

180

189

50









8) Nominal flow: Heat circuit Δ10 K, cooling circuit Δ 3 K.






17 Technical data, DHP-C

Table 50.

Technical data

DHP-C

Type

Refrigerant

Compressor

Electrical data

3-N, ~50 Hz

6 8

Type R407C

Amount kg 1,20

Test pressurisation MPa 3,4

Design pressure

Type

MPa 3,1

Oil



Start current 3

Fuse

A

A

12

10

6

4 /16 5 /20

R407C

1,30

3,4

3,1

3,2

0,2

10

16 4 /16 5 /20

6 6

10

0,5

18

16 4 /16 5 /20

4H

R407C

Brine/water

R134a

1,45

3,4

3,1

0,90

3,2

2,45

Scroll

4,2

POE

400

3,0

0,2

3/6/9

12

10 4 /16 5 /20

6

5H

R134a

1,00

3,2

2,45

3,2

0,2

7H

R134a

1,10

3,2

2,45

4,2

0,3

10

16 4 /16 5 /20

6

18

16 4 /16 5 /20

6

Electrical data

1-N, ~50 Hz

Performance 10



* kW * kW * Rated output, circulation pumps

Auxiliary heater, 3 step kW *

Start current

Fuse

Heat factor 1

3 A *

A * kW 5,33

4,04 kW 5,38

3,41 kW 1,3

COP

1

Heat factor

2

COP 2

Incoming power 1

Nominal flow

8 Cooling circuit

Heating circuit


Cooling circuit

Max/Min temperature

Heating circuit

Cooling circuit

Heating circuit


Water volume

Operation

High pressure

Water heater

Condenser

Evaporator l/s l/s

0,36

0,14 kPa 35 kPa 48

°C

°C

MPa 0,08 l l l

MPa 2,85

MPa 3,10

1,6

0,7

*

*

*

*

*

*

7,51

4,34

7,40

3,57

1,7

0,49

0,19

32

44

0,08

2,85

3,10

1,9

1,2

*

*

*

*

*

*

9,40

4,24

9,24

3,51

2,2

0,62

0,24

76

39

0,08

2,85

3,10

2,1

1,6

*

*

*

*

*

-

*

-

3,20

-

2,70

0,20

0,08

37

48

20/-10

55/20

0,03

1,80

2,45

180

1,6

0,7

*

*

*

*

*

-

*

-

4,50

-

2,90

0,28

0,12

54

50

0,03

1,80

2,45

1,9

1,2

*

*

*

*

*

-

*

-

5,50

-

2,90

0,37

0,14

60

43

0,03

1,80

2,45

2,1

1,6


DHP-C

Antifreeze

Number of units

Dimensions L x W x H

Weight empty

Weight filled

Sound power level 11

De-superheater l

6

* mm kg kg

210

390 dB(A) 47

8

*

215

395

44

10

225

405

46

4H

* *


1

690x596x1845

*

210

390

47

5H

215

395

44

7H

*

225

405

46









8) Nominal flow: Heat circuit Δ10 K, cooling circuit Δ 3 K.






Compressor

Electrical data

3-N ~50Hz

18 Technical data, DHP-A

Table 51.

Technical data

DHP-A

Type

Refrigerant Type

Amount kg


Design pressure

Type

MPa

Oil

Mains power supply


Rated output, circ.pumps/fan


Start current 16

Fuse

V kW kW kW

A

A

Electrical data

1-N ~50Hz

Mains power supply


Rated output, circ.pumps/fan


Start current

16

Fuse


COP

1

Heat factor 2

COP 2

Nominal flow

8

Incoming power

2

Cooling circuit

Heating circuit

Cooling circuit External available pressure 9

Heating circuit

Lowest outdoor temperature for compressor start

Max/Min temperature

Cooling circuit

Heating circuit


Operation

V kW kW kW

A

A kW kW

°C

°C

MPa

MPa kW l/s l/s kPa kPa

°C


6

0,95

8

1,45

10

Air/water

R404A

1,50

3,4

3,1

Scroll

POE

400

4,2

0,6

12

1,60

3,0

0,4

11

25 3 /32 4 /40 5

5,00

2,85

5,90

3,26

1,8

0,32

0,14

46

45

3,2

0,6

5,0

0,7

3/6/9/12/15

12

10 3 /16 4 /20 5 /

20 6 /25 7 /25 14 /30

15

10

16 3 /16 4 /20 5 /

20 6 /25 7 /25 14 /30

15

18

16 3 /16 4 /20 5 /

20 6 /25 7 /30 14 /35 15

17

16 3 /20 4 /25 5 /

25 6 /25 7 /30 14 /35 15

230

3,2

0,4

3,6

0,6

4,5

0,6

1,5/3,0/4,5

5,5

0,7

21

25 3 /32 4 /40 5

7,02

3,10

7,96

3,45

2,3

0,49

0,20

83

43

26

32 3 /40 4 /50 5

8,20

2,85

9,85

3,29

3,0

0,58

0,24

69

40

-20

28

32 3 /40 4 /50 5

9,84

3,00

11,3

3,35

3,4

0,64

0,28

95

51

20/-25

55/20

0,08

2,65/2,85

DHP-A

Water volume

High pressure

Water heater

Condenser

Evaporator l l l

MPa

Antifreeze

13

Number of units

Indoor unit

Outdoor unit

Max pipe length

(copper pipe Ø 28 mm between heat pump and outdoor unit)

Dimensions L x W x

H

Weight empty

Weight filled

Sound power level 11

Dimensions L x W x

H mm kg kg dB(A) mm

Weight empty

Weight filled

Sound power level.

Low/high 12

Fan speed, low/ high kg kg dB(A) rpm

Air flow, low/high m

3

/h m

6

1,3

1,0

8 10 12

3,10

180

2,7 2,2 2,7

1,3 1,3 1,6

Ethylene glycol + water solution with freezing point -32±1°C

2

690x596x1845

260

440

42

53/63

450/600

2500/3200

260

440

48

260

440

46

630x1175x1245

53/63

450/600

94

99

54/67

500/800

2500/3200 2500/3900

60 (30+30)

268

448

48

54/67

500/800

2500/3900


1) For A2W35 according to EN14511 (including circulation pumps and outdoor units).





6) 12 kW aux. heater (compressor off).


8) Nominal flow: Heat transfer fluid Δ10K, cooling circuit Δ3K.

9) The pressure that must not be exceeded outside the heat pump without falling below the nominal flow.


11) Sound power level measured according to EN ISO 3741 at A7W45 (EN 12102).

12) Sound power level measured according to EN ISO 3471.

13) Do not use propylene glycol or ethanol.

14) Heat pump with 12 kW additional heater.




19 Technical data, DHP-A Opti

Table 52.

Technical data

DHP-A Opti

Type

Refrigerant

Compressor

Electrical data

3-N ~50Hz

Type

Amount kg


Design pressure

Type

MPa

Oil


Rated output, circ.pumps/fan kW kW Auxiliary heater, 5 step

Start current 16

Fuse

A

A

Electrical data

1-N ~50Hz

Performance 10


Rated output, compressor kW kW Rated output, circ.pumps/fan


Start current

16

Fuse

A

A kW

Heat factor 1

COP

1

Heat output

2

COP 2 kW kW

Nominal flow


8

Incoming power

2

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit


Max/Min temperature

Cooling circuit

Heating circuit


Operation

High pressure l/s l/s kPa kPa

°C

°C

°C

MPa

MPa

MPa


6

0,95

8

1,45

10

Air/water

R404A

1,50

3,4

3,1

Scroll

POE

400

4,2

0,4

12

1,60

3,0

0,3

11

25 3 /32 4 /40 5

5,00

2,85

5,90

3,26

1,8

0,32

0,14

88

61

3,2

0,3

5,0

0,6

3/6/9/12/15

12

10 3 /16 4 /20 5 /20 6

/

25 7 /25 14 /30 15

3,2

10 18

16 3 /16 4 /20 5 /20 6

/

25 7 /25 14 /30 15

3,6

16 3 /16 4 /20 5 /20 6

/

25 7 /30 14 /35 15

230

4,5

17

16 3 /20 4 /25 5 /25 6 /

25 7 /30 14 /35 15

5,5

0,3 0,3 0,6 0,4

1,5/3,0/4,5

21

25 3 /32 4 /40 5

7,02

3,10

7,96

3,45

2,3

0,49

0,20

74

59

26

32 3 /40 4 /50 5

8,20

0,58

0,24

56

57

-20

2,85

9,85

3,29

3,0

28

32 3 /40 4 /50 5

9,84

3,00

11,3

3,35

3,4

0,64

0,28

98

51

20/-25

55/20

0,08

2,65/2,85

3,10

DHP-A Opti


Condenser

Evaporator l l l

Antifreeze

13

Number of units

Indoor unit

Outdoor unit

Max pipe length

(copper pipe

Ø28mm between heat pump and outdoor unit)

Dimensions L x W x

H

Weight empty

Weight filled

Sound power level

11

Dimensions L x W x

H

Weight empty mm kg kg kg dB(A) mm

Weight filled

Sound power level, low/high 12 kg dB(A)

Fan speed, low/high rpm

Air flow, low/high m

3

/h m

450/600

2500/3200

6

1,3

1,0

8 10 12

2,2

1,3

180

2,7

1,3

2,7

1,6


2

690x596x1845

260

440

42

53/63

260

440

48

53/63

260

440

46

630x1175x1245

94

99

54/67

268

448

48

54/67

450/600

2500/3200

500/800

2500/3900

60 (30+30)

500/800

2500/3900



















20 Technical data, DHP-AL

Table 53.

Technical data

DHP-AL

Type

Refrigerant

Compressor

Electrical data

3-N ~50Hz

Type

Amount kg


Design pressure

Type

MPa

Oil



Start current 16

Fuse

A

A

6

0,95

3,0

0,4

8

1,45

3,2

0,6

10

Air/water

R404A

1,50

3,4

3,1

Scroll

POE

400

4,2

0,6

3/6/9/12/15

12

1,60

5,0

0,7

Electrical data

1-N ~50Hz

Performance

Nominal flow

10

8



Max/Min temperature

Pressure switches




Start current

16

Fuse

A

A kW

Heat factor 1

COP

1

Heat factor

2

COP 2 kW kW

Incoming power

2

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit l/s l/s kPa kPa

°C

Cooling circuit

Heating circuit

Low pressure

Operation

High pressure

°C

°C

MPa

MPa

Mpa

12

10 3 /16 4 /20 5 /20 6

/

25 7 /25 14 /30 15

3,2

10 18

16 3 /16 4 /20 5 /20 6

/

25 7 /25 14 /30 15

3,6

16 3 /16 4 /20 5 /20 6

/

25 7 /30 14 /35 15

230

4,5

17

16 3 /20 4 /25 5 /25 6 /

25 7 /30 14 /35 15

5,5

0,4

11

25 3 /32 4 /40 5

5,00

2,85

5,90

3,26

1,8

0,32

0,14

46

45

0,6

21

25 3 /32 4 /40 5

7,02

3,10

7,96

3,45

2,3

0,49

0,20

83

43

0,6

1,5/3,0/4,5

26

32 3 /40 4 /50 5

8,20

2,85

9,85

3,29

3,0

0,58

0,24

69

40

-20

20/-25

55/20

0,08

2,65/2,85

3,10

0,7

28

32 3 /40 4 /50 5

9,84

3,00

11,3

3,35

3,4

0,64

0,28

95

51


DHP-AL

Water volume

Antifreeze

13

Number of units

Indoor unit

Water heater

Outdoor unit

Max pipe length

(copper pipe


6 8 10 12

Water heater

Condenser

Evaporator l l l

1,3

1,0

Dimensions L x W x

H

Weight empty mm kg kg 158 dB(A) 42 mm

154

Weight filled

Sound power level

11

Dimensions L x W x

H

Weight empty

Weight filled

Dimensions L x W x

H

Weight empty

Weight filled kg kg mm kg kg

Sound power level, low/high

12 dB(A) 53/63

Fan speed, high/low rpm 450/600

Air flow, low/high m 3 /h

2500/3200 m

2,2

1,3

180

2,7

1,3

2,7

1,6


3

690x596x1538

154

159

48

53/63

450/600

2500/3200

154

160

46

690x596x1538

172

352

630x1175x1245

94

99

54/67

500/800

2500/3900

60 (30+30)

162

168

48

54/67

500/800

2500/3900










10) The values apply to new heat pumps with clean heat exchangers






16) According to IEC6100



21 Technical data, DHP-AL Opti

Table 54.

Technical data

DHP-AL Opti

Type

Refrigerant

Compressor

Electrical data

3-N ~50Hz

Type

Amount kg


Design pressure

Type

MPa

Oil



Start current 16

Fuse

A

A

6

0,95

3,0

0,3

Electrical data

1-N ~50Hz

Performance

Nominal flow

10

8



Max/Min temperature

Pressure switches

Water volume




Start current

16

Fuse

A

A kW

Heat output 1

COP

1

Heat output

2

COP 2 kW kW

Incoming power

2

Cooling circuit

Heating circuit

Cooling circuit

Heating circuit l/s l/s kPa kPa

°C

Cooling circuit

Heating circuit

Low pressure

Operation

High pressure

Water heater

°C

°C

MPa

MPa l

MPa


11

25 3 /32 4 /40 5

5,00

2,85

5,90

3,26

1,8

0,32

0,14

88

61

8

1,45

3,2

0,3

3/6/9/12/15

12 10 18 17

10 3 /16 4 /20 5 /20 6 /

25 7 /25 14 /30 15

16 3 /16 4 /20 5 /20 6 /

25 7 /25 14 /30 15

3,2 3,6

16

25

230

4,5

3

7

/16

/30

4 /20

14 /35

5 /20

15

6 / 16 3 /20 4 /25 5 /25 6 /

25 7 /30 14 /35 15

5,5

0,3 0,3 0,6 0,4

1,5/3,0/4,5

21

25 3 /32 4 /40 5

7,02

3,10

7,96

3,45

2,3

0,49

0,20

74

59

10

Air/water

R404A

1,50

3,4

3,1

Scroll

POE

400

4,2

0,4

20/-25

55/20

0,08

2,65/2,85

3,10

180

26

32 3 /40 4 /50 5

8,20

0,58

0,24

56

57

-20

2,85

9,85

3,29

3,0

12

1,60

5,0

0,6

28

32 3 /40 4 /50 5

9,84

3,00

11,3

3,35

3,4

0,64

0,28

98

51

DHP-AL Opti

Antifreeze 13

Number of units

Indoor unit

Water heater

Outdoor unit

Max pipe length

(copper pipe


Condenser

Evaporator l l

6 8 10 12

1,3

1,0

2,2

1,3

2,7

1,3

2,7

1,6

Ethylene glycol + water solution with freezing point below -32±1°C

3

690x596x1538 Dimensions L x W x

H

Weight empty

Weight filled mm kg kg

154

158

Sound power level

11

Dimensions L x W x

H

Weight empty

Weight filled dB(A) mm kg kg mm

42,5

Dimensions L x W x

H

Weight empty

Weight filled

Sound power level, high/low 12 kg kg dB(A) 53/63

Fan speed, high/low rpm

Air flow, low/high m 3 /h

450/600

2500/3200 m

154

159

47,7

53/63

154

160

45,5

690x596x1538

172

352

630x1175x1245

94

99

54/67

450/600

2500/3200

500/800

2500/3900

60 (30+30)

162

168

48,1

54/67

500/800

2500/3900









8) Nominal flow: Heat circuit Δ10K, cooling circuit Δ3K.










VMGFC302

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