LAK 9IMR - Heat pump DIMPLEX - Free user manual and instructions

Product type	Air-to-water heat pump, two units, reversible
Brand and model	Dimplex LAK 9IMR
Indoor unit dimensions (H x W x D)	694 x 450 x 240 mm
Outdoor unit dimensions (H x W x D)	834 x 950 x 330 mm
Weight indoor/outdoor unit	23 kg / 69 kg
Electrical supply - Power	1~/N/PE 230 V, 50 Hz, fuse C25 A (compressor) + C32 A (heater)
Electrical supply - Control	1~/N/PE 230 V, 50 Hz, fuse C13 A
Nominal heat output (Prated)	4 kW (according to EU regulation no. 813/2013)
COP at A7/W35	4.8 (according to EN 14511)
Refrigerant	R410A, 1.9 kg, GWP 2088, CO₂ equivalent 4 t
Nominal air flow (outdoor)	3 600 m³/h
Sound power level - Indoor / Outdoor	42 dB(A) / 63 dB(A)
Operating temperature range (heating)	Outdoor air: -20 °C to +30 °C; Water outlet: max. 55 °C
Operating temperature range (cooling)	Outdoor air: +10 °C to +43 °C; Water outlet: 7 to 25 °C
Auxiliary electric heater	2, 4 or 6 kW switchable (delivery state: 6 kW)
Protection	IP20 (indoor) / IPX4 (outdoor)
Safety valve opening pressure	2.5 bar
Defrost type	Cycle inversion
Recommended maintenance	Annual check by a professional; regular cleaning of the outdoor heat exchanger with water
Hydraulic connections	Heating flow and return: G 1\" (external thread with flat gasket)

Frequently Asked Questions - LAK 9IMR DIMPLEX

What are the dimensions of the indoor unit of the Dimplex LAK 9IMR heat pump?

The indoor unit measures 694 mm in height, 450 mm in width and 240 mm in depth. The outdoor unit measures 834 x 950 x 330 mm.

What type of refrigerant does the LAK 9IMR use and what is its quantity?

The heat pump uses R410A with a charge of 1.9 kg. The global warming potential (GWP) is 2088, which corresponds to a CO₂ equivalent of 4 tonnes.

What is the electrical power of the auxiliary heater and how to adjust it?

The auxiliary electric heater is switchable to 2, 4 or 6 kW. It is set to 6 kW at delivery. To reduce the power, remove one or two copper bridges on terminal X7 (see wiring diagram).

What are the sound levels of the LAK 9IMR?

The sound power level is 42 dB(A) for the indoor unit and 63 dB(A) for the outdoor unit (according to EN 12102). The sound pressure level at 1 m from the indoor unit is 35 dB(A).

How to correctly install the outdoor unit in a coastal area?

Avoid direct exposure to sea breeze. If possible, orient the unit in the opposite direction to the prevailing wind. If this is not possible, install a concrete windbreak with a height and width at least 150% of the outdoor unit, at a minimum distance of 700 mm.

What is the commissioning procedure for the heat pump?

Commissioning must be carried out by an authorized after-sales service. The steps include: close all consumer circuits, ensure water flow, select 'Automatic' mode, start the 'Commissioning' program in the controller, then gradually reopen the heating circuit valves while maintaining a return temperature of at least 18 °C.

How to bleed the heating circuit?

Open all heating circuits, then bleed at the highest point of the circuit. Refill with water if necessary (minimum static pressure). Bleeding is complete when pressing the tip of the bleed valve, water gushes out like a fountain.

What to do if the heat pump does not heat enough?

Check: 1) the heating curve setting in the controller; 2) the water pressure (should be between 2.0 and 2.5 bar); 3) the dirt separator (clean if clogged); 4) that the shut-off valves are open.

How to clean the heat exchanger on the heating side?

In case of fouling, cleaning by a professional with 5% phosphoric acid or 5% formic acid is recommended. Cleaning must be done in the opposite direction of normal flow, at room temperature. Then rinse thoroughly with a neutralizer.

What is the maximum installation height of the outdoor unit relative to the indoor unit?

The maximum height difference between units is 30 m (the outdoor unit can be above or below). For differences greater than 4 m with the indoor unit higher, a refrigeration technician must check the need for oil reservoirs and traps.

USER MANUAL LAK 9IMR DIMPLEX

LAK 3IMR LAK 6IMR LAK 9IMR LAK 14IMR LAK 14ITR

Installation and Operating Instruction

Split air-to-water heat pump with hydrobox

Front view of a rectangular electronic device with internal components and a central display (no text or symbols visible)

! ACHTUNG!

graph TD
    A["Seewind"] --> B["Step 1"]
    B --> C["Seepage with circular icon"]
    C --> D["Step 2"]
    D --> E["Backwind with circular icon"]

1.1 Symbols and markings......EN-2
1.2 Important notes....EN-2
1.3 Intended use......EN-2
1.4 Legal regulations and guidelines ......EN-2

2 Purpose......EN-3

2.1 Area of application.....EN-3
2.2 General properties....EN-3

3 Scope of supply......EN-3

3.1 Indoor unit....EN-3
3.2 Contact plate....EN-3
3.3 Wärmepumpenmanager....EN-3

4 Outdoor unit....EN-4

4.1 Installation....EN-4
4.2 Precautions in winter and in seasonal winds....EN-6

5 Assembly indoor unit......EN-6

5.1 General.....EN-6
5.2 Indoor unit fixing....EN-6
5.3 Heating system connection....EN-7

6 Commissioning......EN-8

6.1 General......EN-8
6.2 Preparation......EN-8
6.3 Commissioning procedure....EN-8

7 Connecting the pipework and cables to the outdoor unit......EN-9

7.1 Refrigerant pipes....EN-9
7.2 Electrical connections....EN-11
7.3 Final work....EN-12
7.4 Leak test and evacuation....EN-13

8 Test points, maintenance and troubleshooting......EN-14

8.1 Checklist prior to commissioning......EN-14
8.2 Maintenance....EN-15
8.3 Troubleshooting......EN-15
8.4 Characteristic curve temperature sensor outdoor unit......EN-16
8.5 Characteristic curve temperature sensor indoor unit.....EN-16

9 Cleaning / maintenance ...... EN-17

9.1 Maintenance....EN-17
9.2 Cleaning the heating system ......EN-17

10 Faults / troubleshooting....EN-17

11 Decommissioning / disposal......EN-17

12 Device information ...... EN-18

13 Product information as per Regulation (EU) No 813/2013, Annex II, Table 2......EN-20

Anhang · Appendix · Annexes ...... A-I

Maßbilder / Dimension Drawings / Schémas cotés....A-II

Diagramme / Diagrams / Diagrammes....A-IX

1 Safety not 1.3 Intended use

1.1 Symbols and markings

Particularly important information in these instructions is marked with CAUTION! and NOTE.

CAUTION!

Immediate danger to life or danger of severe personal injury or significant damage to property.

NOTE

Risk of damage to property or minor personal injury or important information with no further risk of personal injury or damage to property.

1.2 Important notes

The operational reliability of the safety valve must be checked at regular intervals. We recommend having an annual service inspection carried out by a qualified specialist company.

The outflow from the safety valve should visibly flow into a waste water drain.

The installer of the heating system is responsible for checking whether an additional expansion vessel is required.

Operating the system in a sensible way can provide significant energy savings. The heating water temperature should be as low as required during heat pump operation. The planner of the heating system is responsible for determining the system temperature.

When installing an underfloor heating system, a sensible value for the maximum flow and return temperature should be set on the heat pump manager. The position of the temperature sensor is important in this regard.

This device is only intended for use as specified by the manufacturer. Any other use beyond that intended by the manufacturer is prohibited. This requires the user to abide by the relevant project planning documents. Please refrain from tampering with or altering the device.

1.4 Legal regulations and guidelines

This heat pump is designed for use in a domestic environment according to Article 1, Paragraph 2 k) of EU directive 2006/42/EU (machinery directive) and is thus subject to the requirements of EU directive 2014/35/EU (low-voltage directive). It is thus also intended for use by non-professionals for heating shops, offices and other similar working environments, agricultural establishments and hotels, guesthouses and other residential buildings.

The construction and design of the LWPS device complies with all relevant EU directives, DIN and VDE regulations (see CE declaration of conformity).

When connecting the LWPS device to the power supply, the relevant VDE, EN and IEC standards are to be fulfilled. Any further connection requirements stipulated by the mains supply network operator must also be observed.

The current valid regulations must be complied with when connecting the heating system. The local regulations for the drinking water supply must also be complied with when connecting the LWPS device to the drinking water supply.

This unit can be used by children aged 8 and over and by persons with limited physical, sensory or mental aptitude or lack of experience and/or knowledge, providing they are supervised or have been instructed in the safe use of the unit and understand the associated potential dangers.

Children must not play with the device. Cleaning and user maintenance must not be carried out by children without supervision.

CAUTION!

When operating or maintaining a heat pump, the legal requirements of the country where the heat pump is operated apply. Depending on the refrigerant quantity, the heat pump must be inspected for leaks at regular intervals by a certified technician, and these inspections must be recorded.

More information can be found in the accompanying log book.

2 Pur p o s e

2.1 Area of application

The indoor unit constitutes the interface between a reversible heat pump and the heating system in the building. The indoor unit contains all hydraulic components required between heat generation and heat distribution with an unmixed heating circuit.

2.2 General properties

■ Low installation effort
Ready for use
The infinitely adjustable operation of the circulating pump permits adjustment of the output according to need.

on LAK 6IMR - LAK 14ITR:

■ Switchable pipe heater (2 / 4 / 6 kW) for supplementary heating.

on LAK 3IMR:

■ with 2 kW (fixed-setpoint) pipe heating

3 Scope of supply

3.1 Indoor unit

Hydraulic components

■ Unmixed heating circuit including controlled circulating pump
■ 2nd heat generator, electrical pipe heater, heat output 2 / 4 / 6 kW, secured via safety temperature limiter

Safety equipment:

■ Safety valve, start-to-leak pressure 2.5 bar

Refrigerating equipment

■ Heat exchanger refrigerant / heating water
■ Connections for split line

NOTE

External sensor is included with the outdoor unit as standard. Option for connecting an external sensor Cap. 8.5.2 on pag. 16.

3.2 Contact plate

The cover must be removed to allow access to the inside of the device.

The two screws on the bottom must be loosened for this. The cover must then be removed to the top.

Front view of a rectangular electronic device with internal components and a central display (no text or symbols visible)

CAUTION!

Before opening the device, ensure that all circuits are disconnected from the power supply!

After removing the cover, the electronics area is freely accessible.

The contact plate contains the supply connection terminals, heating contactors, connecting terminals for the connecting line to the heat pump and the heat pump manager.

3.3 Wärmepumpenmanager

The integrated heat pump manager is a convenient electronic regulating and control device. It controls and monitors the entire heating system based on the outdoor temperature, as well as domestic hot water preparation and safety systems.

The enclosed operating instructions describe the functional principle and use of the heat pump manager.

4 Outdoor unit

4.1 Installation

It is advisable to install the outdoor unit close to a wall, on a foundation separate from the building with a minimum clearance of 0.3 m on the intake side (Fig. 4.1 + Fig. 4.2).
If a canopy is mounted to protect from direct sunlight, rain or snow it must not impede the heat exchange of the device.
In the case of a free-standing installation, the foundation is to be connected on the intake side, flush with the device. This will prevent snow from building up between the foundation and the evaporator.
The minimum clearances (Fig. 4.1) indicated must be adhered to.
When selecting an installation location, it should be ensured where possible that persons are not going to be inconvenienced by the circulation of warm/cold air or by noise emissions.
The condensate tray offers various options for the condensate drain. In warmer regions, the condensate can drain from the device freely. In regions with longer periods of frost, a controlled condensate drain is required.

Fig. 4.1

Fig. 4.2

Fig. 4.3

Installation on wall brackets is not advisable, as this frequently leads to noise problems.

If this type of installation is used, observe the following instructions:

Fit rubber buffers
■ Take the weight of the outdoor unit into account
■ Ensure that the wall bracket is no higher than 1 m above the ground
■ Ensure that minimum clearances are adhered to

Fig. 4.4

NOTE

The heat pump is not intended for use over 2000 metres above sea level.

4.1.1 Wall opening for split lines and electric wires

■ Please proceed as follows when laying split lines and electric wires:
- Drill a 70 mm opening for the pipework using a core drill
The opening for the pipework should be slightly inclined towards the outdoor unit, so that no rainwater can penetrate the building.

4.1.2 Wall opening for condensate drain

4.1.3 Installation in coastal areas

NOTE

The air-to-water heat pump must NOT be installed in areas where corrosive gases such as acids or alkaline gases can occur.

NOTE

If the outdoor unit is installed in a coastal area, direct sea wind should be avoided.

Case 1: If the outdoor unit is installed in a coastal area, direct sea wind should be avoided. Install the outdoor unit in the opposite direction to the sea wind.

graph TD
    A["Sea wind"] --> B["Dam or reservoir"]
    B --> C["Downward arrow"]
    C --> D["Sea wind"]
    D --> E["Downward arrow"]

Case 2: If the outdoor unit is installed in the direction of the sea wind, set up a wind guard to catch the sea wind.

The wind guard must be robust enough to catch the sea wind (e.g. made from concrete).
The height and width of the wind guard must correspond to at least 150% of the outdoor unit.
A distance of at least 700 mm from the outdoor unit must be maintained to guarantee sufficient air flow.

graph TD
    A["Wind protection"] --> B["Sea wind"]
    B --> C["Building with two turbines"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333

NOTE

If the outlined requirements cannot be complied with during installation in coastal areas, please contact Dimplex employees for more information on corrosion protection.

NOTE

Dust or salt soiling on the heat exchanger should be regularly cleaned (at least once a year) with water.

4.2 Precautions in winter and in seasonal winds

In snowy areas or extremely cold locations, adequate protective measures must be taken to guarantee that the unit continues functioning correctly.
- Install the outdoor unit so that snow cannot fall directly on the unit. If snow collects on the air inlet and freezes, errors can occur. Install a cover in areas with snowfall.
When installing the outdoor unit in areas where there is a lot of snowfall, ensure the unit is installed at least as high as the level of an average snowfall (average annual snowfall).
If more than 100 mm of snow collects on the outdoor unit, the snow must be removed prior to operation.

NOTE

The intake and outlet opening of the outdoor unit should not be positioned against the wind if possible.

5 Assembly indoor unit

5.1 General

The unit should always be installed indoors on a level, smooth wall. Maintenance work can be carried out easily from the operator side (a minimum clearance at the side is not required). This can be ensured by maintaining a clearance of 1 m at the front. The indoor unit should be mounted at a height of approx. 1.30 m. It must be installed in a room protected from frost and with short pipe runs.

NOTE

Setup and installation must be performed by an authorised specialist company.

When installing the indoor unit, the load-bearing capacity of the wall should be checked. On account of the acoustics, measures for isolating possible vibrations should also be very carefully planned in advance.

The following connections need to be established on the indoor unit:

■ Flow / return of the heating system
■ Safety valve outflow
Power supply
Supply voltage
Split refrigerant pipe
Condensate drain
■ Expansion vessel connection (optional)

NOTE

When removing the unit cover, it must be taken into account that the length of the connecting cable between the control panel in the unit cover and the controller on the contact plate is only 1.5 m. If the device cover can only be placed further away than this when it has been removed, the plug connection on the controller or on the control panel must first be disconnected.

5.2 Indoor unit fixing

The indoor unit is attached to the wall with the screws and dowels (8 mm) included in the scope of supply. The following procedure should be used:

■ Mount the dowels for the top fastening eyelets.
- Screw the screw into the dowel so that the indoor unit can be mounted.
■ Mount the indoor unit by the upper fastening eyelets.
■ Mark the position of the side drill-holes.
■ Unhook the indoor unit again
■ Mount the dowels for the side drill holes.

5.3 Heating system connection

The heating system connections on the indoor unit have a 1" flat sealing external thread. A spanner must be used to firmly grip the transitions when making the connections.

There is a hose sleeve on the safety valve for on-site connection of a plastic hose. This should be fed into a siphon or outflow.

Before connecting the heating water system to the heat pump, the heating system must be flushed to remove any impurities, residue from sealants, etc. Any accumulation of deposits in the liquefier may cause the heat pump to completely break down. Once the heat pump has been connected to the heating system, it must be filled, purged and pressure-tested.

The following points must be observed when filling the system:

■ Untreated filling water and make-up water must be of drinking water quality
(colourless, clear, free of sediments)
■ Filling water and make-up water must be pre-filtered (max. pore size 6 m).

Scale formation in domestic hot water heating systems cannot be avoided, but in systems with flow temperatures below 60 °C, the problem can be disregarded. With high-temperature heat pumps and in particular with bivalent systems in the higher performance range (heat pump + boiler combination), flow temperatures of 60 °C and more can be achieved. The following standard values should therefore be adhered to with regard to the filling and make-up water according to VDI 2035, sheet 1: The total hardness values can be found in the table.

Total heat output in kW	Total alkaline earths in mol/m3 and/or mmol/l	Specific system volume (VDI 2035) in l/kW
		< 20	≥ 20 < 50	≥ 50
		Total hardness in °dH
< 50	≤ 2.0	≤ 16.8	≤ 11.2	< 0.111
50 - 200 ≤ 2.0		≤ 11.2 ≤ 8	4
200 - 600 ≤ 1.5		≤ 8.4	< 0.111
>600	< 0.02	< 0.111

1. This value lies outside the permissible value for heat exchangers in heat pumps.

Fig. 5.1: Guideline values for filling and make-up water in accordance with VDI 2035

For systems with an above-average specific system volume of 50 l/kW, VDI 2035 recommends using fully demineralized water and a pH stabiliser to minimize the risk of corrosion in the heat pump and the heating system.

CAUTION!

With fully demineralized water, it is important to ensure that the minimum permissible pH value of 7.5 (minimum permissible value for copper) is complied with. Failure to comply with this value can result in the heat pump being destroyed.

NOTE

If the unit is connected to an existing hydraulic water circuit, the hydraulic pipes must be cleaned to remove residues and limescale.

The heating circuit must include a corresponding purging facility, a fill and drain valve and a dirt trap on-site.

It is also recommended to install a shut-off device in the return before integration into the indoor unit is carried out.

Minimum heating water flow rate

The minimum heating water flow rate must be ensured in all operating states of the heating system with at least 50 l (buffer tank with individual room control or underfloor heating system with 50 l minimum volume in open heating circuits). When the minimum heating water flow rate is undershot, the plate heat exchanger in the refrigeration circuit can freeze, which can lead to total loss of the heat pump.

NOTE

The installation of a flow rate switch (DFS LAK or VSH LAK) is absolutely necessary to ensure water flow before compressor start and during defrosting.

The nominal flow rate is specified depending on the max. flow temperature in the device information and must be taken into account during planning. With design temperatures below 30 °C in the flow, the design must be based on the max. volume flow with 5 K spread for A7/W35.

The specified nominal flow rate (See “Device information” on page 18.) must be assured in all operating states. An installed flow rate switch is used only for switching off the heat pump in the event of an unusual and abrupt drop in the heating water flow rate and not to monitor and safeguard the nominal flow rate.

Frost protection

A method of manual drainage must be provided for heat pump internal components which are exposed to frost. The frost protection function of the heat pump manager is active whenever the heat pump manager and the heat circulating pump are ready for operation. The system has to be drained if the heat pump is taken out of service or if a power failure occurs. The hydraulic network should be operated with suitable frost protection if heat pump systems are implemented in buildings where a power failure cannot be detected (vacation homes etc.).

NOTE

Chemical treatment to protect from rust should be carried out by the installer.

6 Commissioning

6.1 General

To ensure that commissioning is performed correctly, it should only be carried out by an after-sales service technician authorised by the manufacturer. This may be a condition for an additional warranty (see "Warranty service").

6.2 Preparation

The following items must be checked prior to commissioning:

All of the indoor unit connections must be installed as described in Chapter 5.1.
All of the outdoor unit connections must be installed as described in Chapter 7.
All valves which could impair the proper flow of the heating water in the heating circuit must be open.
■ The air intake and air outlet paths must be clear.
The settings of the heat pump manager must be adapted to the heating system in accordance with the manager's operating instructions.
- The heating water circuit must be completely filled and purged.
■ Ensure that the condensate drain functions properly.
■ The outflow from the heating water pressure relief valve must also function correctly.
■ Purging the heating system:
Ensure that all heating circuits are open, purge the system at the highest position and refill water if necessary (comply with static minimum pressure).

6.3 Commissioning procedure

The heat pump is commissioned via the heat pump manager. Settings should be made in compliance with the HPM's instructions.

The heating element of mono energy systems should be disconnected during commissioning.

Heat source temperature		Max. temperature spread between heating flow and return flow
by to
-20 °C -15	°C 4 K
-14 °C -10	°C 5 K
-9 °C -5	°C	6 K
-4 °C	0 °C	7 K
1 °C	5 °C	8 K
6 °C	10 °C	9 K
11 °C	15 °C	10 K
16 °C	20 °C	11 K
21 °C	25 °C	12 K
26 °C	30 °C	13 K
31 °C	35 °C	14 K

At heating water temperatures below 7 °C, commissioning is not possible. The water in the buffer tank must be heated with the 2nd heat generator to at least 18 °C.

The following procedure must then be followed to ensure problem-free commissioning:

1) Close all consumer circuits.
2) Ensure that the heat pump has the correct water flow.
3) Use the manager to select the automatic operating mode.
4) In the special functions menu, start the "Commissioning" program.
5) Wait until a return temperature of at least 25 °C has been reached.
6) Now slowly reopen the heating circuit valves in succession so that the heating water flow rate is constantly raised by slightly opening the respective heating circuit. The heating water temperature in the buffer tank must not be allowed to drop below 20 °C during this process. This ensures that the heat pump can be defrosted at any time.
7) When all heating circuits are fully open and a return temperature of at least 18 °C is maintained, the commissioning is complete.

CAUTION!

Operating the heat pump at low system temperatures may cause the heat pump to break down completely. After a prolonged power failure, the commissioning procedure detailed above must be followed.

7 Connecting the pipework and cables to the outdoor unit

This chapter describes the refrigerant pipe connections and the electrical cable connections on the outdoor unit.

7.1 Refrigerant pipes

CAUTION!

Work on the system must only be performed by authorised and qualified after-sales service technicians!

Certain requirements with regard to pipe length and rise must be complied with when installing refrigerant pipes. Once all requirements have been fulfilled, certain preparations must be made.

Once these are complete, the connecting pipe from the outdoor unit to the indoor unit can be connected.

7.1.1 Requirements for pipe length and rise

Model	Pipe size (mm)(diameter: )		Length A (m) Rise B (m)					*additional refrigerant(g/m)
	Gas	Liquid	Normal	Min.	Max.	Normal	Max.
3 kW	12(1/2")	6(1/4")	7.5	2	25	0	15	15
6 kW9 kW	15.88(5/8")	9.52(3/8")	7.5	3	50	0	30	30
14 kW	15.88(5/8")	9.52(3/8")	7.5	3	50	0	30	60

The standard pipe length is 7.5 m. Up to a length of 15 m, no additional refrigerant filling is required. For pipe lengths over 15 m, the system must be filled with additional refrigerant in accordance with the table.

*Example: When installing the 14 kW model at a distance of 50 m, 2100 g refrigerant must be added according to the following calculation: (50-15) x 60 g = 2100 g

NOTE

If the indoor unit is mounted 4 or more metres higher than the outdoor unit, a cooling technology specialist must perform a separate check to ensure that the devices for conveying the oil up and down the pipes have been installed correctly in the hot gas pipe.

NOTE

The rated output of the device corresponds to the standard pipe length and the maximum possible length.

CAUTION!

Incorrect filling with refrigerant could lead to faults during operation.

1) Production operation (see model name label)
2) Installation operation (where possible, attach alongside the maintenance connections for adding or removing refrigerant)
3) Total filling (1, + 2,)

7.1.2 Preparation for pipework

The preparation of the pipework takes place in five steps. One main cause of refrigerant leaks is incorrect flanging. Flanging must be carried out carefully and according to the following steps.

Step 1: Cutting pipes and cables

■ Use the installation kit for pipework or the pipes purchased from your local dealer.
■ Measure the distance between the indoor and outdoor unit.
- Cut the pipes slightly longer than the measured distance.

Step 2: Removing burrs

■ Remove all burrs from the interface of the pipework.
- Hold the pipe end downwards so that no burrs can fall into the pipe.

Step 3: Inserting screw nuts

■ Remove the screw nuts on the indoor and outdoor unit.
■ Insert the screw nuts into the deburred pipe.
No nuts can be inserted into the pipe after flanging.

Step 4: Flanging

■ Flanging must be carried out as follows with a flanging tool for R-410A refrigerant as shown in the figure.

External diameter "A"
mm Inch mm
9.52 3/8 1.5 ~	1.7
15.88 5/8 1.6 ~	1.8

- Hold the copper pipe steady in a mould with the dimensions shown in the bottom table.

Step 5: Checks

■ Compare the flanging with the figure on the right.
If the flanging is visibly damaged, cut the relevant section off and repeat the flanging.

7.1.3 Pipe connections on the indoor unit

The pipe connection on the indoor unit takes place in two steps. Read the following instructions carefully.

Step 1: Initial fastening

- Align the centre of the pipe and tighten the screw nuts by hand.

Step 2: Fastening

■ Tighten the screw nuts with a spanner.
Torques

External diameter Torque
mm Inch Nm
9.52 3/8 34 - 42
15.88 5/8 65 - 81

7.1.4 Pipe connections on the outdoor unit

The pipe connection on the outdoor unit takes place in steps.

Step 1: Determining the direction in which the pipes are to run

■ The pipes can be connected in four directions

Step 2: Fastening

• Align the centre of the pipe and tighten the screw nuts by hand.
  ■ Tighten the screw nuts with a spanner until they click.
  Torques.

Step 3: Preventing foreign bodies from entering the unit

Seal all pipe openings well with putty or a different type of insulation (available separately).
If insects or small animals enter the outdoor unit, they can cause short circuits in the control cabinet.
Lay the pipes. To do this, cover the coupling device of the indoor unit with insulation and fix in place with two adhesive tapes.
■ Adequate heat insulation is extremely important.

CAUTION!

Never open the valves of the outdoor component. Carry out the work from Cap. 7.2 on pag. 11 and Cap. 7.3 on pag. 12 first of all.

7.2 Electrical connections

7.2.1 Outdoor unit

NOTE

The DIP switches on the circuit boards in the outdoor unit have no function. The positions of the DIP switches must remain in their factory default and must not be changed!

Two cables must be connected on the outdoor unit:

A 'mains cable' and a 'data cable'

Both cables must be laid between the indoor and outdoor unit. The mains cable is used to supply the outdoor unit with power and the data cable is for communication between the outdoor and indoor component. The VDE directives and regulations and local conditions must be taken into account in the design and installation of the two cables.

The indoor component already contains a safeguard element for the outdoor component. The safeguarding of the entire heat pump must also take place externally.

For LAK 3IMR, LAK 6IMR, LAK 9IMR, LAK 14IMR:

The mains cable on the outdoor unit must be three-core and must be connected to the L / N / PE (power supply) terminals. (See Cap. 3.2 on page XII; Cap. 3.5 on page XV and Cap. 3.8 on page XVIII)

For LAK 14ITR

The mains cable on the outdoor unit must be 5-core and must be connected to the R / S / T / N / PE terminals (see Cap. 3.5 on page XV)

If no connection lugs are available, proceed as follows.

No cables with different thicknesses may be connected to the connecting terminal. (one of the cables may come loose during strong heat development.)
■ Multiple cables of the same thickness must be connected as shown in the figure.

A shielded 2-core cable must be used as a data cable.

The data cable is connected to the terminals (Bus_A(+) / Bus_B(-)) of the gateway circuit board (small circuit board in the outdoor component) and to the heat pump manager (+/-) in the indoor component (see Appendix, Connection diagram Chap. 2.5).

7.2.2 Indoor unit

Two supply cables must be connected to the indoor unit: The power supply to the heat pump and the control voltage for the integrated heat pump manager (see Appendix Cap. 3.5 on pag. XV). (Load: 3\~; 1x 5-core; control: 1\~; 1x three-core) The VDE directives and regulations and local conditions must be taken into account in the design and installation of the cables.

For LAK 3IMR, LAK 6IMR, LAK 9IMR

On these heat pumps, the power supply can be provided by load distribution using two separate supply cables (2x 1\~/N/PE; 230 VAC; 50 Hz). Otherwise, the power supply is always provided using one cable (3\~/N/PE; 400 VAC; 50 Hz).

For LAK 14IMR

On this heat pump, the power supply can only be provided by load distribution using two separate supply cables (2x 1\~/N/PE; 230 VAC; 50 Hz). A power supply using a single cable is not permitted

For LAK 14ITR

On this heat pump, the power supply can be provided by load distribution using two separate supply cables (2x 3\~/N/PE; 400 VAC; 50 Hz). Otherwise, the power supply is always provided using one cable (3\~/N/PE; 400 VAC; 50 Hz).

NOTE

The positions of the copper link cables in the terminals for the power supply must be complied with. The copper links may need to be correctly connected, contrary to the factory default configuration (see Cap. 3.2 on page XII, Cap. 3.5 on page XV, or Cap. 3.8 on page XVIII).

The supply cable for the output section of the heat pump (up to 5-core) is fed from the electricity meter of the heat pump via the utility blocking contactor (if required) into the heat pump (see heat pump operating instructions for supply voltage). An all-pole disconnecting device with a contact gap of at least 3 mm (e.g. utility blocking contactor or power contactor) and an all-pole circuit breaker with common tripping for all external conductors must be installed in the power supply for the heat pump (tripping current and characteristic in compliance with the device information). The connection takes place on X1.

The supply cable (1\~L/N/PE\~230 V, 50 Hz) for the heat pump manager must have a continuous voltage. For this reason, it should be tapped upstream from the utility blocking contactor or be connected to the household current, because otherwise important protection functions could be lost during a utility block. The correct control voltage must be ensured according to the general information leaflet/rating plate. The connection takes place on X2.

The utility blocking contactor (K22) with 3 main contacts (1/3/5 // 2/4/6) and an auxiliary contact (NO contact 13/14) should be dimensioned according to the heat pump output and must be supplied by the customer. The NO contact of the utility blocking contactor (13/14) is looped from terminal strip X3/GND to connector terminal N1-J7/DI3. CAUTION! Extra-low voltage!

For detailed instructions on how to connect the external components as well as how the heat pump manager functions, please refer to the device connection diagram and the operating instructions supplied with the heat pump manager.

The 2nd heat generator is connected with a 6 kW heat output in factory default. To reduce the output to 4 kW or 2 kW, one or

both of the two copper link cables must be removed from terminal X7 (see circuit diagram).

For detailed information, see circuit diagrams in the attachment.

The electric cables can be fed into the unit from below (in the refrigeration connection area).

7.3 Final work

Once the pipes and electric cables have been connected, the pipes must be bent and a number of tests carried out. The leak test must be carried out with particular care, as a refrigerant leak results in a direct reduction in output.

Leaks are also difficult to identify once the installation is complete.

7.3.1 Pipe bends

Bend the pipe by covering the connection cable and refrigerant pipe (between the indoor and outdoor unit) with insulation and fix the insulation in place with two adhesive tapes.

1) Fix the refrigerant pipe, mains cable and connection cable with adhesive tape from bottom to top. Fix the bound pipework along the wall.
2) Form a siphon to prevent water from entering the chamber and electrical components.
3) Fix the pipework to the wall using clamps or similar.

Wrap the pipework in adhesive tape

1) Fix the pipes, mains cable and connection cable with adhesive tape from bottom to top. If they are fixed from top to bottom, rain could enter into the pipes or cables.
2) Fix the bound pipework along the external wall with clamps or similar.
3) A siphon prevents water from entering the electrics.

7.4 Leak test and evacuation

Air and moisture in the cooling system have unwanted effects as outlined below.

1) The pressure in the system increases.
2) The operating current increases.
3) The cooling (or heating) output falls.
4) Moisture in the cooling circuit can freeze and block the capillary tubes.
5) Water can cause corrosion on parts in the cooling system.

This means that the indoor and outdoor unit, as well as the connection pipe, must be checked for leaks and pumped empty to remove any non-condensable gases and moisture from the system.

7.4.1 Preparation

Ensure that each pipe (liquid and air side) between the indoor and outdoor unit is connected correctly and the wiring for the test operation has been carried out. Remove the maintenance valve caps from both the gas and liquid side of the outdoor unit. Ensure that both maintenance valves on the liquid and air side of the outdoor unit are closed at this point.

7.4.2 Leak test

■ Connect the multi-way valve (with pressure gauges) and dry nitrogen gas cylinder with the filling hoses on this maintenance connection.

NOTE

A multi-way valve must be used for the leak test. If no multi-way valve is available, an isolating valve can also be used. The "Hi" lever on the 3-way valve must be closed at all times.

The system may be charged with max. 3.0 MPa dry nitrogen. The cylinder valve must be closed with a pressure of 3.0 MPa. The next step is to search for leaks with liquid soap.

NOTE

In order to prevent liquid nitrogen from entering the cooling system, the top side of the gas cylinder must be higher than the bottom side when pressure is building in the system.

1) The gas cylinder is usually used in an upright position. Check all pipe connections (indoor and outdoor) and maintenance valves of the air and liquid side for leaks. Bubbles indicate a leak. The soap must be wiped away with a clean cloth.
2) If no leaks are identified in the system, reduce the nitrogen pressure by removing the filling hose connection from the gas cylinder. When the system pressure is normal again, the hose must be removed from the gas cylinder.

7.4.3 Evacuation

1) Connect the end of the filling hose mentioned above to the vacuum pump to pump the pipework and indoor unit empty. The levers "Lo" and "Hi" on the multi-way valve must be open. Start the vacuum pump. The duration of the pumping empty process varies with different lengths of the pipework and the pump output. The following table shows the time required for pumping empty.

Time required for pumping empty with a 0.11m_/hour vacuum pump
Length of the pipework less than 10 m	Length of the pipework more than 10 m
30 min. or longer	60 min. or longer
0.6 mbar or less

2) Close the levers "Lo" and "Hi" on the multi-way valve at the desired vacuum pressure and switch off the vacuum pump.

Finally

1) Open the valve handle on the liquid side completely in an anti-clockwise direction with a maintenance valve key.
2) Open the handle of the valve on the gas side completely in an anti-clockwise direction.
3) Loosen the filling hose connected to the air side slightly from the maintenance connection to reduce the pressure, then remove the hose.
4) Tighten the screw nuts and caps on the air side maintenance connection again with an adjustment key. This process is very important to prevent leaks on the system.
5) Position the valve caps on the air and liquid side maintenance valves again and tighten. The purging with the vacuum pump is complete. The split-heat pump is now ready for test operation.

8 Test points, maintenance and troubleshooting

If no faults have occurred here by this point, the unit can now be operated and you can enjoy the benefits of the LWPS split heat pump.

8.1 Checklist prior to commissioning

CAUTION!

Before opening the unit, ensure that all electric circuits are isolated from the power supply.

Before commissioning the unit, run through the test points outlined in this chapter.

You will also find instructions for maintenance and troubleshooting here.

Pos.	Category	Components	Test point
1	Current breakers	Field wiring	All switches with contacts with different polarities should be connected securely in accordance with the specified directives or laws.Cable connections should only by made by trained specialist personnel.Cable connections and electrical components available separately should comply with European and local directives.Cable connections should be made in accordance with the circuit diagram provided with this unit.
2			A circuit breaker (earth leakage breaker) with 30 mA should be installed.The circuit breaker in the control cabinet of the indoor unit should be switched on before the unit is commissioned.
3		E	An earthing wire should be connected. Never connect an earthing wire to a gas pipe, water piping, a metal object of the building, a surge protection socket or similar.
4		Power supply unit	Use a separate mains cable.
5		Cable connections of the terminal panel	Connections on the terminal panel (in the control cabinet of the indoor unit) should be fixed in place securely enough.
6	Water pressure	Filling pressure	After filling with water, the pressure gauge should show a pressure of 1.0 to 1.5 bar. The maximum pressure should not exceed 3.0 bar.
7		Purging	While filling with water, the system should be purged via the purging hole.If no water comes out after pressing on the tip (on the top side of the opening), the purging process is not yet complete.If the system has been purged optimally, water sprays out like a fountain when pressing on the tip. Take care when testing the purging. Water could spray on your clothes.
8		Isolating valve	The isolating valves (on-site) should be open.
11	Installing the unit	Maintenance of components	There should be no visibly damaged components in the indoor unit.
12		Refrigerant leak	Refrigerant leaks reduce the output of the unit. In the event of leaks, please inform an authorised after-sales service partner.

8.2 Maintenance

To maintain an optimal output on the LWPS split heat pump, regular checks and maintenance work should be carried out on the unit.

It is advisable to work through the following checklist at least once a year.

CAUTION!

Before opening the unit, ensure that all electric circuits are isolated from the power supply.

Pos.	Category	Components	Test point
1	Water	Water pressure	In normal operation, the pressure gauge should show a pressure of 2.0 to 2.5 bar.If the pressure is under 0.3 bar, water should be added.
2		Dirt trap (water filter)	Close the relevant isolating valves and remove the dirt trap. Clean the dirt trapWater may flow out when dismantling the dirt trap.
4	C	u Cable connections of the terminal panelr	Check the terminal panel for loose or faulty connections.r en

8.3 Troubleshooting

If the LWPS split heat pump is experiencing problems during operation or is not working at all, check the following points.

CAUTION!

Before opening the unit, ensure that all electric circuits are isolated from the power supply.

8.3.1 Removing faults during operation

Pos. Fault Cause Solution
1	Insufficient heating or cooling.	Incorrect setting of the target temperature.	Check the setting of the heating curve on the heat pump manager
		Insufficient water filling.	Check the pressure gauge and add water until the pressure gauge shows a pressure of 2.0 to 2.5 bar.
		Water flow is low.	Check whether the dirt trap is heavily soiled. If so, the dirt trap must be cleaned.Check whether the pressure indicator shows a pressure of at least 0.3 bar.Check whether the water piping is blocked by soiling or limescale deposits.
2	The outdoor unit is not working, despite correct power supply (information on the control panel).	Temperature on the water inlet is too high.	If there is a temperature above 55 °C on the water inlet, the outdoor unit is switched off to protect the system.
		Temperature on the water inlet is too low.	If there is a temperature below 5 °C on the water inlet, the outdoor unit is switched off to protect the system. Wait until the temperature on the water inlet has been increased by the indoor unit.
3	Noises from the water pump	Purging has not been completed.	Open the protective cap of the purging and add water until the pressure gauge shows a pressure of 2.0 to 2.5 bar.If no water comes out after pressing on the tip (on the top side of the opening), the purging process is not yet complete. If the system has been purged optimally, water sprays out like a fountain when pressing on the tip.
		Water pressure is low.	Check whether the pressure indicator shows a pressure of at least 0.3 bar.Check whether the equalising tank and pressure gauge are working correctly.
4	Water is drained off through the drain hose.	Too much water has been added.	Open the lever of the safety valve and drain off more water until the pressure gauge shows a pressure of 2.0 to 2.5 bar.
		Equalising tank is damaged.	Replace the equalising tank.
5	Domestic water is not heated	Thermal circuit breaker of the flange heater or pipe heater has been triggered	Open the front cover of the indoor component and press the Reset button
		Domestic water heating was deactivated.	Check the settings on the heat pump manager on the indoor unit.

8.4 Characteristic curve temperature sensor outdoor unit

NTC - 10	Air sensor (outdoor unit)
Temperature in °C	-20	-15	-10	-5	-2	0	2	5	10	15	18	20	22	24
kΩ	105	80.2	58.2	44.0	37.4	33.6	30.3	25.9	20.2	15.8	13.8	12.5	11.4	10.5
Temperature in °C	25 26	28 30 32	34 36 3	8 40 50	60 70 80	90
kΩ	10.0	9.57	8.76	8.04	7.38	6.78	6.24	5.74	5.30	3.59	2.49	1.76	1.27	0.93
NTC - 5	Pipe-mounted sensors (outdoor unit)
Temperature in °C	-20	-15	-10	-5	-2	0	2	5	10	15	18	20	22	24
kΩ	52.7	38.9	29.1	22.0	18.7	16.8	15.1	13.0	10.1	7.92	6.88	6.27	5.72	5.23
Temperature in °C	25 26	28 30 32	34 36 3	8 40 50	60 70 80	90
kΩ	5.00	4.78	4.38	4.02	3.69	3.39	3.12	2.87	2.65	1.79	1.24	0.88	0.64	0.47
NTC - 200	Hot gas sensor (output compressor)
Temperature in °C	1 5 1	0 15 20	25 30 35	40 45 50	55 60 65
kΩ	525.00	448.00	326.00	294.33	242.20	200.00	167.57	138.03	133.80	98.00	82.00	64.50	59.00	50.71
Temperature in °C	70	75	80	85	90	95	100	105	110	115	120	130
kΩ	43.73	37.35	32.20	28.16	24.60	21.37	18.50	16.60	14.50	13.30	12.80	10.80

8.5 Characteristic curve temperature sensor indoor unit

8.5.1 Sensor characteristic curves

Temperature in °C			-20	-15	-10	-5	0	5	10
NTC-2 in kΩ			14.6	11.4	8.9	7.1	5.6	4.5	3.7
NTC-10 in kΩ			67.7	53.4	42.3	33.9	27.3	22.1	18.0
15	20	25	30	35	40	45	50	55	60
2.9	2.4	2.0	1.7	1.4	1.1	1.0	0.8	0.7	0.6
14.9	12.1	10.0	8.4	7.0	5.9	5.0	4.2	3.6	3.1

The temperature sensors to be connected to the heat pump manager must correspond to the sensor characteristic curve illustrated in Fig.8.1 on pag. 16. The only exception is the outdoor temperature sensor included in the scope of supply of the heat pump (see Fig.8.2 on pag. 16)

Fig. 8.1: Sensor characteristic curve NTC-10

Fig. 8.2: Sensor characteristic curve NTC-2 according to DIN 44574 Outdoor temperature sensor

8.5.2 Mounting of the external outside temperature sensor (optional)

With outside temperature based control, the connection of an outside temperature sensor (FG 3115) is recommended for mounting on the north side of the building, as incorrect values would otherwise be recorded for the heating curve calculation (e.g. during intensive sun radiation).

The external sensor (FG3115) is connected to the heat pump manager and activated by after-sales service during commissioning.

With room temperature based control via the smart RTC, no additional outside temperature sensor is required.

Dimensioning parameter sensor lead
Conductor material	Cu
Cable-length	50 m
Ambient temperature	35 °C
Laying system	B2 (DIN VDE 0298-4 / IEC 60364-5-52)
External diameter	4-8 mm

9 Cleaning / maintenance

9.1 Maintenance

To protect the cover, avoid leaning anything against the device or putting objects on the device. External parts can be wiped clean with a damp cloth and domestic cleaner.

CAUTION!

Never use cleaning agents containing sand, soda, acid or chloride, as these can damage the surfaces.

9.2 Cleaning the heating system

The ingress of oxygen into the heating water circuit may result in the formation of oxidation products (rust), particularly if steel components are used. These enter the heating system via the valves, the circulating pumps and/or plastic pipes. A diffusion-resistant installation is therefore essential, especially with regard to the piping of underfloor heating systems.

Residue from lubricants and sealants may also contaminate the heating water.

In the event of severe contamination leading to a reduction in the performance of the liquefier in the heat pump, the system must be cleaned by a heating technician.

Based on current information, we recommend using a 5 % phosphoric acid solution for cleaning purposes. However, if cleaning needs to be performed more frequently, a 5 % formic acid solution should be used.

In both cases, the cleaning fluid should be at room temperature. We recommend flushing the heat exchanger in the direction opposite to the normal flow direction.

To prevent acidic cleaning agents from entering the heating system circuit, we recommend connecting the flushing device directly to the flow and return of the liquefier of the heat pump.

It is then important that the system be thoroughly flushed using appropriate neutralising agents to prevent any damage from being caused by cleaning agent residue remaining in the system.

Acids must be used with care, and the regulations of the employers' liability insurance associations adhered to.

The instructions of the cleaning agent manufacturer must always be observed.

10 Faults / troubleshooting

LAiC devices are high-quality products and should work without problems. Should a fault occur, however, it will be indicated on the heat pump manager display. In this case, consult the "Faults and troubleshooting" page in the operating instructions of the heat pump manager. If you cannot correct the fault yourself, please contact your after-sales service technician.

CAUTION!

Before opening the device, ensure that all circuits are disconnected from the power supply!

After disconnecting the power supply, always wait for at least 5 minutes to allow stored electric charges to dissipate.

CAUTION!

Work on the system must only be performed by authorised and qualified after-sales service technicians!

11 Decommissioning / disposal

Before dismantling the LWPS device, disconnect it from the power source and close all valves. The heat pump must be dismantled by trained personnel. Observe all environmental requirements regarding the recovery, recycling and disposal of materials and components in accordance with all applicable standards.

12 Device information
1. The specified sound levels apply if the supporting feet (available as an option) are not used. If the supporting feet are used, the level can increase by up to 3 dB (A).

1 Type and order code			LAK 3IMR	LAK 6IMR	LAK 9IMR	LAK 14IMR	LAK 14ITR
2 Design
Heat source Air Air Air Air
2.1	Model		Split reversible	Split reversible	Split reversible	Split reversible	Split reversible
2.2	Controller		WPM	WPM Econ	WPM Econ	WPM Econ	WPM Econ
2.3	Thermal energy metering		no	no	no	no	no
2.4	Installation location		Indoors / out-doors	Indoors / out-doors	Indoors / out-doors	Indoors / out-doors	Indoors / out-doors
2.5	Performance level		Variable	Variable	Variable	Variable	Variable
3 Operating limits
3.1	Heating water flow / return	°C	up to 55 / from 20	up to 55 / from 20	up to 55 / from 20	up to 55 / from 20	up to 55 / from 20
3.2	Cooling water flow	°C	7 to 25	7 to 25	7 to 25	7 to 25	7 to 25
3.3	Air (heating)	°C	-20 to +30	-20 to +30	-20 to +30	-20 to +30	-20 to +30
3.4	Air (cooling)	°C	+10 to +43	+10 to +43	+10 to +43	+10 to +43	+10 to +43
4 Flow / sound
4.1 Heating water flow / internal pressure differential
in accordance with EN 14511		m^3/h / Pa	0.530 / 3700	1.6 / 20000	1.6 / 20000	2.4 / 30400	2.4 / 30400
free compression		Pa	66900	38800	38800	29600	29600
Minimum heating water flow		m^3/h / Pa	0.3 / 1200	0.75 / 8500	0.75 / 8500	0.9 / 10000	0.9 / 10000
free compression		Pa	72800	68500	68500	77300	77300
4.2 Noise-power level in accordance with EN 12102 outdoors^1		dB(A)	60	63 63	68 67
4.3 Sound pressure level in 10 m distance, outdoors ^21		dB(A)	30	35 35	40 39
4.4 Sound power level for outdoor lowered operation ^1		dB(A)	51	61	61	65	64
4.5 Sound pressure level at 10 m distance for outdoor lowered operation ^12		dB(A)	21	33	33	37	36
4.6 Noise-power level in accordance with EN 12102 indoors		dB(A)	42	42 42	42 42
4.7 Sound pressure level at a distance of 1 m indoors		dB(A)	35	35	35	35	35
4.8 Air flow		m^3/h	3000	3600	3600	7200	7200
5 Dimensions, weight and filling quantities
5.1 Device dimensions^3 x D mm	indoors	H x W	694x450x240870x655x320	694x450x240834x950x330	694x450x240834x950x330	694x450x2401380x950x330	694x450x2401380x950x330
5.2 Weight of the transport unit(s) incl. packaging indoors / outdoors		kg	21 / 51	23 / 69	23 / 69	25 / 94	25 / 116
5.3 Device connections for heating inches			G 1A	G 1A	G 1A	G 1A	G 1A
5.4 Refrigerant; total filling weight kg		type/	R410A / 1.0	R410A / 1.9	R410A / 1.9	R410A / 2.38	R410A / 2.98
5.5 GWP value / CO _2 equivalent		--- / t	2088 / 2	2088 / 4	2088 / 4	2088 / 5	2088 / 6
5.6 Lubricant; total filling quantity litres		type/	Polyvinyl ether (PVE) / 0.57	Polyvinyl ether (PVE) / 0.9	Polyvinyl ether (PVE) / 0.9	Polyvinyl ether (PVE) / 1.3	Polyvinyl ether (PVE) / 1.3
5.7 Volume of heating water in the outdoor component		Litres	0	0	0	0	0
5.8 Electrical pipe heater		kW	2	2.4 or 6^4	2.4 or 6^4	2.4 or 6^4	2.4 or 6^4
5.9 Start-to-leak pressure, safety valve		bar	2.5	2.5	2.5	2.5	2.5
6 Electrical connection
6.1 Supply voltage / fuse protection Compressor			1-/N/PE 230 V(50 Hz) / C16 A	1-/N/PE 230 V(50 Hz) / C25 A	1-/N/PE 230 V(50 Hz) / C25 A	1-/N/PE 230 V(50 Hz) / C40 A	3-/N/PE 400 V(50 Hz) / C16 A
Electrical pipe heater			1-/N/PE 230 V(50 Hz) / C10 A	1-/N/PE 230 V(50 Hz) / C32 A	1-/N/PE 230 V(50 Hz) / C32 A	1-/N/PE 230 V(50 Hz) / C32 A	3-/N/PE 400 V(50 Hz) / C10 A
Compressor + electrical pipe heater			3-/N/PE 230 V(50 Hz) / C25 A	3-/N/PE 400 V(50 Hz) / C25 A	3-/N/PE 400 V(50 Hz) / C25 A		3-/N/PE 400 V(50 Hz) / C25 A
RCD type			B	B	B	B	B
6.2 Control voltage / fuse protection			1-/N/PE 230 V(50 Hz) / C13 A	1-/N/PE 230 V(50 Hz) / C13 A	1-/N/PE 230 V(50 Hz) / C13 A	1-/N/PE 230 V(50 Hz) / C13 A	1-/N/PE 230 V(50 Hz) / C13 A
6.3 Degree of protection according to EN 60 529 indoors/outdoors			IP 20 / IP X4	IP 20 / IP X4	IP 20 / IP X4	IP 20 / IP X4	IP 20 / IP X4
6.4 Starting current limiter			Inverter	Inverter	Inverter	Inverter	Inverter
6.5 Rotary field monitoring			Yes	Yes	Yes	Yes	Yes
6.6 Starting current		A	1.1	1.2	1.2	5,9	1.3
6.7 Nominal power consumption at A7/W35 / max. consumption 5 6		kW	0.65/4.4^7	1.17/8.39^7	2.11/9.41^7	3.31/11,69^7	3.39/12.28^7
6.8 Nominal current at A7/W35 / cos φ		A/--	2.8/0.99	5.14/0.99	9.27/0.99	14,54/0.99	4.94/0.99
6.9 Nominal power consumption A2 / W35 6			0.8 1.41 1.91 3.69 3.50
6.10 Power consumption of compressor protection (per compressor)		W	--	--	--	--	--
6.11 Power consumption of fan		W	43	124	124	248	248
7 Complies with the European safety regulations			8	8	8	8	8
8 Additional model features
8.1 Type of defrosting			Reverse circula-tion	Reverse circula-tion	Reverse circula-tion	Reverse circula-tion	Reverse circula-tion
8.2 Condensate tray frost protection / Water in device is protected from freezing 9			No / Yes	No / Yes	No / Yes	Yes/ Yes	Yes/ Yes
8.3 Max. operating overpressure (heat source/heat sink) bar			3.0	3.0	3.0	3.0	3.0
9 Heat output / coefficients of performance (COP)
9.1 Heat output / COP5			EN 14511	EN 14511	EN 14511		EN 14511
	at A-15 / W35	kW / --- 10	2.3/2.1	3.6/2.3	5.2/2.3	10.9/2.4	10.6/2.4
		kW / --- 6	2.3/2.1	3.6/2.3	5.2/2.3	10.9/2.4	10.8/2.4
	at A-7 / W35	kW / --- 10	2.5/2.6	4.2/2.8	6.3/2.4	13.1/2.7	13.9/2.9
		kW / --- 6	2.5/2.6	4.2/2.8	6.3/2.4	13.1/2.7	13.9/2.9
	at A-7 / W55	kW / --- 10	2.0/1.7	2.9/1.8	4.2/1.7	9.0/1.7	11.3/2.1
		kW / --- 6	2.0/1.7	2.9/1.8	4.2/1.7	9.0/1.7	11.3/2.1
	at A2 / W35	kW / --- 10	2.6/3.2	4.8/3.4	5.3/3.6	10.7/3.3	10.5/3.6
		kW / --- 6	2.6/3.2	4.8/3.4	6.2/3.2	12.3/3.3	11.0/3.2
	at A7 / W35	kW / --- 10	3.0/4.6	5.6/4.8	5.6/4.8	10.2/4.4	10.6/4.1
		kW / --- 6	3.0/4.6	5.6/4.8	9.0/4.3	14.6/4.4	14.7/4.3
	at A7 / W45	kW / --- 10	2.8/3.2	5.4/3.4	5.4/3.4	9.1/3.8	9.8/3.7
		kW / --- 6	2.8/3.2	5.4/3.4	8.3/3.3	14.0/3.5	13.9/3.3
	at A7 / W55	kW / --- 10	2.5/2.6	5.1/2.9	5.1/2.9	8,7/2.9	8.8/2.9
		kW / --- 6	2.5/2.6	5.1/2.9	6.2/2.6	12.9/2.9	13.2/2.7
	at A10 / W35	kW / --- 10	3.2/4.8	6.0/5.1	6,0/5.1	10.8/4.6	11.3/4.5
		kW / --- 6	3.2/4.8	6.0/5.1	9.6/4.5	14.9/4.4	15.7/4.3
	at A20 / W35	kW / --- 10	3.6/4.0	7.3/5.8	7.3/5.8	13.1/5.7	13.9/5.5
		kW / --- 6	3.6/4.0	7.3/5.8	10.8/5.3	18.8/5.7	22.3/5.1
	at A20/ W55	kW / --- 10	2.2/3.1	5.7/3.4	5.7/3.4	10.6/3.6	10.8/3.8
		kW / --- 6	2.2/3.1	5.7/3.4	8.4/3.2	16.9/3.7	16.2/3.6
9.2 Cooling capacity / COP
	at A27 / W7	kW / --- 6	2.4/3.8	6.5/3.3	6.5/3,3	12.4/3.1	12.9/3.0
	at A27 / W18	kW / --- 6	3.2/4.6	8.7/4.2	8.7/4.2	16.4/3.8	17.1/3.7
	at A35 / W7	kW / --- 6	2.3/3.0	6.2/2.6	6.2/2.6	11.8/2.5	12.3/2.5
	at A35 / W18	kW / --- 6	3.0/4.0	9.0/3.4	9.0/3.4	14.0/3.1	15.5/3.3

1. The specified sound pressure level corresponds to the operating noise of the heat pump in heating operation at 35°C flow temperature.
   The specified sound pressure level is the free sound area level. The measured value can deviate by up to 16 dB(A) depending on the installation location.
2. Please note that additional space is required for pipe connections, operation and maintenance.
3. Factory default 6 kW
4. These data indicate the size and capacity of the system according to EN 14511. For an analysis of the economic and energy efficiency of the system, the bivalence point and the regulation should be taken into consideration. These figures are only achieved with clean heat exchangers. Instructions for care, commissioning and operation can be found in the relevant sections of the installation and operation instructions. The specified values have the following meaning, e.g. A7 / W35: Heat source temperature 7 °C and heating water flow temperature 35 °C.
5. Maximum heating/cooling output
6. Max. intake incl. pipe heating and immersion heater (state of supply)
7. See CE declaration of conformity
8. The heat circulating pump and the heat pump controller must always be ready for operation.
   10.COP-optimised operation

13 Product information as per

Regulation (EU) No 813/

2013, Annex II, Table 2

Information requirements for heat pump space heaters and heat pump combination heaters
Model	LAK 3IMR
Air-to-water heat pump	yes
Water-to-water heat pump	no
Brine-to-water heat pump	no
Low-temperature heat pump	yes
Equipped with a supplementary heater	yes
Heat pump combination heater	no
Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application.
Parameters shall be declared for average climate conditions:
Item Symbol Value Unit Item Symbol Value						Unit
Rated heat output (*)	Prated	2	kW	Seasonal space heating energy efficiency	ηs	134 %
Declared capacity for heating foer part load at indoor temperature 20°C and outdoor temperature Tj				Declared coefficient of performance or primary energy ratio for part load at indoor temperature 20 °C and outdoor temperature Tj
Tj = -7°C	Pdh	2,5 kW	Tj = -7°C		COPd	2,60 -
Tj = +2°C	Pdh	2,6 kW	Tj = +2°C		COPd	3,35 -
Tj = +7°C	Pdh	3,1 kW	Tj = +7°C		COPd	5,28 -
Tj = +12°C	Pdh	3,6 kW	Tj = +12°C		COPd	5,25 -
Tj = bivalent temperature	Pdh	2,4 kW	Tj = bivalent temperature		COPd	2,39 -
Tj = operation limit temperature	Pdh	2,4 kW	Tj = operation limit temperature		COPd	2,39 -
For air-to-water heat pumps				For air-to-water heat pumps:
Tj = -15°C (if TOL < -20°C)	Pdh	2,3 kW	Tj = -15°C (if TOL < -20°C)		COPd	2,05 -
Bivalent temperature	Tbiv	-10	°C	For air-to-water heat pumps:Operation limit temperature	TOL	-10 °C
Cycling interval capacity for heating	Pcych	-	kW Cycling interval efficiency		COPcyc	- -
Degradation co-efficient (**)	Cdh	0,90	-	Heating water operating limit temperature	WTOL	55 °C
Power consumption in modes other than active mode				Supplementary heater
Off mode	POFF	0,015	kW Rated	heat output (*)	Psup	0 kW
Thermostat-off mode	PTO	0,020	kW	Type of energy input	eletrical
Standby mode	PSB	0,015	kW
Crankcase heater mode	PCK	0,000	kW
Other items
Capacity control	variable			For air-to-water heat pumps: Rated air flow rate, outdoors	-3000	m3/h
Sound power level, indoors/outdoors	LWA	42/60	dB	For water-/brine-to-water heat pumps: Rated brine or water flow rate, outdoor heat exchanger	-	m3/h
Emissions of nitrogen oxides	NOx	-	mg/kWh
For heat pump combination heater:
Declared load profile	-			Water heating energy efficiency	ηwh	- %
Daily electricity consumption	Qelec	-	kWh	Daily fuel consumption	Qfuel	- kWh
Contact details	Glen Dimplex Deutschland GmbH, Am Goldenen Feld 18, 95326 Kulmbach
(*) For heat pump space heaters and heat pump combination heaters, the rated output Prated is equal to the design load for heating Pdesignh, and the rated heat output of a supplementary capacity for heating sup(Tj).
(**) If Cdh is not determined by measurement nthen the default degradation is Cdh = 0,9(-) not applicable
Model	LAK 6IMR
Air-to-water heat pump	yes
Water-to-water heat pump	no
Brine-to-water heat pump	no
Low-temperature heat pump	yes
Equipped with a supplementary heater	yes
Heat pump combination heater	no
Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application.
Parameters shall be declared for average climate conditions:
Item Symbol Value Unit Item Symbol Value						Unit
Rated heat output (*)	Prated	4	kW	Seasonal space heating energy efficiency	ηs	155 %
Declared capacity for heating foer part load at indoor temperature 20°C and outdoor temperature Tj				Declared coefficient of performance or primary energy ratio for part load at indoor temperature 20 °C and outdoor temperature Tj
Tj = -7°C	Pdh	4,2 kW	Tj = -7°C	COPd	2,83 -
Tj = +2°C	Pdh	4,8 kW	Tj = +2°C	COPd	3,67 -
Tj = +7°C	Pdh	5,7 kW	Tj = +7°C	COPd	5,66 -
Tj = +12°C	Pdh	6,4 kW	Tj = +12°C	COPd	9,72 -
Tj = bivalent temperature	Pdh	4,0 kW	Tj = bivalent temperature	COPd	2,62 -
Tj = operation limit temperature	Pdh	4,0 kW	Tj = operation limit temperature	COPd	2,62 -
For air-to-water heat pumps				For air-to-water heat pumps:
Tj = -15°C (if TOL < -20°C)	Pdh	3,6 kW	Tj = -15°C (if TOL < -20°C)	COPd	2,23 -
Bivalent temperature	Tbiv	-10 °C		Operation limit temperature	TOL	-10 °C
Cycling interval capacity for heating	Pcych	-	kW Cycling interval efficiency	COPcyc	-	-
Degradation co-efficient (**)	Cdh	0,90	-	Heating water operating limit temperature	WTOL	55 °C
Power consumption in modes other than active mode				Supplementary heater
Off mode	POFF	0,015	kW Rated	heat output (*)	Psup	0 kW
Thermostat-off mode	PTO	0,020	kW	Type of energy input	eletrical
Standby mode	PSB	0,015	kW
Crankcase heater mode	PCK	0,000	kW
Other items				For air-to-water heat pumps: Rated air flow rate, outdoors	-3600	m3/h
Capacity control	variable
Sound power level, indoors/outdoors	LWA	42/63	dB	For water-/brine-to-water heat pumps: Rated brine or water flow rate, outdoor heat exchanger	-	m3/h
Emissions of nitrogen oxides	NOx	-	mg/kWh
For heat pump combination heater:
Declared load profile	-			Water heating energy efficiency	ηwh	%
Daily electricity consumption	Qelec	-	kWh	Daily fuel consumption	Qfuel	kWh
Contact details	Glen Dimplex Deutschland GmbH, Am Goldenen Feld 18, 95326 Kulmbach
(*) For heat pump space heaters and heat pump combination heaters, the rated output Prated is equal to the design load for heating Pdesignh, and the rated heat output of a supplementary capacity for heating sup(Tj).
(**) If Cdh is not determined by measurement nthen the default degradation is Cdh = 0,9(--) not applicable
Model	LAK 9IMR
Air-to-water heat pump	yes
Water-to-water heat pump	no
Brine-to-water heat pump	no
Low-temperature heat pump	no
Equipped with a supplementary heater	yes
Heat pump combination heater	no
Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application.
Parameters shall be declared for average climate conditions:
Item Symbol Value Unit Item Symbol Value						Unit
Rated heat output (*)	Prated	4	kW	Seasonal space heating energy efficiency	ηs	112 %
Declared capacity for heating foer part load at indoor temperature 20°C and outdoor temperature Tj				Declared coefficient of performance or primary energy ratio for part load at indoor temperature 20 °C and outdoor temperature Tj
Tj = -7°C	Pdh	4,4 kW	Tj = -7°C	COPd	1,81 -
Tj = +2°C	Pdh	5,1 kW	Tj = +2°C	COPd	2,86 -
Tj = +7°C	Pdh	5,4 kW	Tj = +7°C	COPd	3,90 -
Tj = +12°C	Pdh	5,4 kW	Tj = +12°C	COPd	5,93 -
Tj = bivalent temperature	Pdh	4,2 kW	Tj = bivalent temperature	COPd	1,61 -
Tj = operation limit temperature	Pdh	4,2 kW	Tj = operation limit temperature	COPd	1,61 -
For air-to-water heat pumps				For air-to-water heat pumps: TOL < -20°C)	COPd	1,29 -
Tj = -15°C (if TOL < -20°C)	Pdh	3,9 kW	Tj = -15°C (if TOL < -20°C)	For air-to-water heat pumps: Operation limit temperature	TOL	-10 °C
Bivalent temperature	Tbiv	-10 °C
Cycling interval capacity for heating	Pcych	-	kW Cycling interval efficiency	COPcyc	-	-
Degradation co-efficient (**)	Cdh	0,90	-	Heating water operating limit temperature	WTOL	55 °C
Power consumption in modes other than active mode				Supplementary heater
Off mode	POFF	0,015	kW Rated	heat output (*)	Psup	0 kW
Thermostat-off mode	PTO	0,020	kW	Type of energy input	eletrical
Standby mode	PSB	0,015	kW
Crankcase heater mode	PCK	0,000	kW
Other items				For air-to-water heat pumps: Rated air flow rate, outdoors	-3600	m³/h
Capacity control	variable
Sound power level, indoors/outdoors	LWA	42/63	dB	For water-/brine-to-water heat pumps: Rated brine or water flow rate, outdoor heat exchanger	-	m³/h
Emissions of nitrogen oxides	NOx	-	mg/kWh
For heat pump combination heater:
Declared load profile	-			Water heating energy efficiency	nwh	%
Daily electricity consumption	Qelec	-	kWh	Daily fuel consumption	Qfuel	kWh
Contact details	Glen Dimplex Deutschland GmbH, Am Goldenen Feld 18, 95326 Kulmbach
(*) For heat pump space heaters and heat pump combination heaters, the rated output Prated is equal to the design load for heating Pdesignh, and the rated heat output of a supplementary capacity for heating sup(Tj).
(**) If Cdh is not determined by measurement nthen the default degradation is Cdh = 0,9(-) not applicable
Model	LAK 14IMR
Air-to-water heat pump	yes
Water-to-water heat pump	no
Brine-to-water heat pump	no
Low-temperature heat pump	no
Equipped with a supplementary heater	yes
Heat pump combination heater	no
Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application.
Parameters shall be declared for average climate conditions:
Item Symbol Value Unit Item Symbol Value						Unit
Rated heat output (*)	Prated	11 kW		Seasonal space heating energy efficiency	ηs	111 %
Declared capacity for heating foer part load at indoor temperature 20°C and outdoor temperature Tj				Declared coefficient of performance or primary energy ratio for part load at indoor temperature 20 °C and outdoor temperature Tj
Tj = -7°C	Pdh	9,6 kW	Tj = -7°C		COPd	1,83 -
Tj = +2°C	Pdh	11,9 kW	Tj = +2°C		COPd	2,77 -
Tj = +7°C	Pdh	14,2 kW	Tj = +7°C		COPd	3,86 -
Tj = +12°C	Pdh	15,8 kW	Tj = +12°C		COPd	4,55 -
Tj = bivalent temperature	Pdh	9,6 kW	Tj = bivalent temperature		COPd	1,83 -
Tj = operation limit temperature	Pdh	7,9 kW	Tj = operation limit temperature		COPd	1,46 -
For air-to-water heat pumps				For air-to-water heat pumps:
Tj = -15°C (if TOL < -20°C)	Pdh	4,8 kW	Tj = -15°C (if TOL < -20°C)		COPd	0,84 -
Bivalent temperature	Tbiv	-10 °C		For air-to-water heat pumps:Operation limit temperature	TOL	-10 °C
Cycling interval capacity for heating	Pcych	-	kW Cycling interval efficiency		COPcyc	-
Degradation co-efficient (**)	Cdh	0,99	-	Heating water operating limit temperature	WTOL	55 °C
Power consumption in modes other than active mode				Supplementary heater
Off mode	POFF	0,015	kW Rated	heat output (*)	Psup	3 kW
Thermostat-off mode	PTO	0,020	kW	Type of energy input	eletrical
Standby mode	PSB	0,015	kW
Crankcase heater mode	PCK	0,000	kW
Other items
Capacity control	variable			For air-to-water heat pumps: Rated air flow rate, outdoors	-7200
Sound power level, indoors/outdoors	LWA	42/68	dB	For water-/brine-to-water heat pumps: Rated brine or water flow rate, outdoor heat exchanger	-	-- m3/h
Emissions of nitrogen oxides	NOx	-	mg/kWh
For heat pump combination heater:
Declared load profile	-			Water heating energy efficiency	ηwh	- %
Daily electricity consumption	Qelec	-	kWh	Daily fuel consumption	Qfuel	- kWh
Contact details	Glen Dimplex Deutschland GmbH, Am Goldenen Feld 18, 95326 Kulmbach
(*) For heat pump space heaters and heat pump combination heaters, the rated output Prated is equal to the design load for heating Pdesignh, and the rated heat output of a supplementary capacity for heating sup(Tj).
(**) If Cdh is not determined by measurement nthen the default degradation is Cdh = 0,9(-) not applicable
Model	LAK 14ITR
Air-to-water heat pump	yes
Water-to-water heat pump	no
Brine-to-water heat pump	no
Low-temperature heat pump	no
Equipped with a supplementary heater	yes
Heat pump combination heater	no
Parameters shall be declared for medium-temperature application, except for low-temperature heat pumps. For low- temperature heat pumps, parameters shall be declared for low-temperature application.
Parameters shall be declared for average climate conditions:
Item Symbol Value Unit Item Symbol Value						Unit
Rated heat output (*)	Prated	10 kW		Seasonal space heating energy efficiency	ηs	116 %
Declared capacity for heating foer part load at indoor temperature 20°C and outdoor temperature Tj				Declared coefficient of performance or primary energy ratio for part load at indoor temperature 20 °C and outdoor temperature Tj
Tj = -7°C	Pdh	11,4 kW	Tj = -7°C	COPd	2,08 -
Tj = +2°C	Pdh	9,7 kW	Tj = +2°C	COPd	2,95 -
Tj = +7°C	Pdh	10,0 kW	Tj = +7°C	COPd	3,65 -
Tj = +12°C	Pdh	9,9 kW	Tj = +12°C	COPd	4,47 -
Tj = bivalent temperature	Pdh	9,8 kW	Tj = bivalent temperature	COPd	1,83 -
Tj = operation limit temperature	Pdh	9,8 kW	Tj = operation limit temperature	COPd	1,83 -
For air-to-water heat pumps				For air-to-water heat pumps:
Tj = -15°C (if TOL < -20°C)	Pdh	6,3 kW	Tj = -15°C (if TOL < -20°C)	COPd	1,21 -
Bivalent temperature	Tblv	-10 °C		For air-to-water heat pumps: Operation limit temperature	TOL	-10 °C
Cycling interval capacity for heating	Pcych	-	kW Cycling interval efficiency	COPcyc	-	-
Degradation co-efficient (**)	Cdh	0,99	-	Heating water operating limit temperature	WTOL	55 °C
Power consumption in modes other than active mode				Supplementary heater
Off mode	POFF	0,015	kW Rated	Psup	3	kW
Thermostat-off mode	PTO	0,020	kW	Type of energy input	eletrical
Standby mode	PSB	0,015	kW
Crankcase heater mode	PCK	0,000	kW
Other items				For air-to-water heat pumps: Rated air flow rate, outdoors	-7200	m3/h
Capacity control	variable
Sound power level, indoors/outdoors	LWA	42/67	dB	For water-/brine-to-water heat pumps: Rated brine or water flow rate, outdoor heat exchanger	-	m3/h
Emissions of nitrogen oxides	NOx	-	mg/kWh
For heat pump combination heater:
Declared load profile	-			Water heating energy efficiency	nwh	%
Daily electricity consumption	Qelec	-	kWh	Daily fuel consumption	Qfuel	kWh
Contact details	Glen Dimplex Deutschland GmbH, Am Goldenen Feld 18, 95326 Kulmbach
(*) For heat pump space heaters and heat pump combination heaters, the rated output Prated is equal to the design load for heating Pdesignh, and the rated heat output of a supplementary capacity for heating sup(Tj).
(**) If Cdh is not determined by measurement nthen the default degradation is Cdh = 0,9 (-) not applicable

Table des matières

Front view of a white appliance casing with internal components and a central display (no text or symbols visible)

e s ATTENTION!

graph TD
    A["Brise marine"] --> B["Top structure: brick building with circular inset image"]
    B --> C["Down arrow"]
    C --> D["Bottom structure: brick building with circular inset image"]

REMARQUE

Pour LAK3IMR, LAK6IMR, LAK9IMR, LAK14IM

Nr.	Name
1	Exhaust air grid
2	Cable entry cover
3	Cabel feedthrough
4	Refrigerant connection cover
5	Maintenance interval gas side
6	Maintenance interval liquid side

Outdoor unit (external)

Heat output of the device:

To the rain water channel or the bottom frost line /

Connection for split line ∅ 6 (flare connection)

Connection for split line ∅ 12 (flare connection)

Hose connection safety valve (on site)

Electrical cable entry

Flow G1A

Return G1A

connection condensate hos (on site)

Raccordement de la conduite des deux unités ∅10 (raccord à visser) Raccordement de la conduite des deux unités ∅16 (raccord à visser) Raccordement flexible de la soupape de sécurité (sur place) Passage de câble électrique Départ circuit de chauffage G1A Retour circuit de chauffage G1A Raccordement du flexible de condensats (sur place)
Connection for split line ∅ 10 (flare connection) Connection for split line ∅ 16 (flare connection) Hose connection safety valve (on site) Electrical cable entry Flow G1A Return G1A connection condensate hos (on site)
1 Anschluss Splitleitung ∅ 10 (Bördelausschluss) 2 Anschluss Splitleitung ∅ 16 (Bördelanschluss) 3 Schlauchanschluss Sicherheitsventil (bauseits) 4 Elektrische Leitungseinführung 5 Heizungsvorlauf G1A 6 Heizungsrücklauf G1A 7 Anschluss Kondensatschlauch (bauseits)

2 Diagramme / Diagrams / Diagrammes

You can find and download the current CE conformity declaration at:

F-67590 Schweighouse Sur Moder

T+33 3 88 07 18 00

F [phone]

[e-mail]

www.dimplex.de/fr

Verkauf und Planung

Projektierung