Dimplex LA 26PS, LA 22PS, LA 17PS User Manual

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LA 17PS LA 22PS LA 26PS

Montageund Gebrauchsanweisung

Installation and

Operating Instructions

Instructions d’installation et d’utilisation

Français English Deutsch

Luft/Wasser-

Air-to-Water Heat

Pompe à chaleur

Wärmepumpe für

Pump for Outdoor

air-eau pour

Außenaufstellung

Installation

installation

 

 

extérieure

Bestell-Nr. / Order no. / No de commande : 452159.66.04

FD 8703

Table of contents

1 Please Read Immediately .............................................................................................................

E-2

1.1

Important Information..............................................................................................................................

E-2

1.2

Legal Regulations and Directives ...........................................................................................................

E-2

1.3

Energy-Efficient Use of the Heat Pump ..................................................................................................

E-2

2

Purpose of the Heat Pump ...........................................................................................................

E-3

 

2.1

Application ..............................................................................................................................................

E-3

 

2.2

Operating Principle .................................................................................................................................

E-3

3

Scope of Delivery ..........................................................................................................................

E-3

 

3.1

Basic Device ...........................................................................................................................................

E-3

 

3.2

Switch Box ..............................................................................................................................................

E-4

 

3.3

Heat Pump Controller .............................................................................................................................

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4

Transport........................................................................................................................................

E-4

5

Set-up .............................................................................................................................................

E-5

 

5.1

General Information ................................................................................................................................

E-5

 

5.2

Condensed Water Pipe...........................................................................................................................

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6

Installation .....................................................................................................................................

E-5

 

6.1

General Information ................................................................................................................................

E-5

 

6.2

Heating System Connection ...................................................................................................................

E-5

 

6.3

Electrical Connection ..............................................................................................................................

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7

Start-up...........................................................................................................................................

E-6

 

7.1

General Information ................................................................................................................................

E-6

 

7.2

Preparation .............................................................................................................................................

E-6

 

7.3

Procedure ...............................................................................................................................................

E-6

8

Maintenance / Cleaning ................................................................................................................

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8.1

Maintenance ...........................................................................................................................................

E-7

 

8.2

Cleaning the Heating System .................................................................................................................

E-7

 

8.3

Cleaning the Air System .........................................................................................................................

E-8

9

Faults / Trouble-Shooting.............................................................................................................

E-8

10

Decommissioning/Disposal .........................................................................................................

E-8

11

Device Information ........................................................................................................................

E-9

Anhang / Appendix / Annexes ............................................................................................................

A-I

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Dimplex LA 26PS, LA 22PS, LA 17PS User Manual

English

1

1Please Read Immediately

1.1Important Information

ATTENTION!

Any work on the heat pump may only be performed by authorised and qualified after-sales service technicians.

ATTENTION!

The device is not suitable for operation with a frequency converter.

1.2Legal Regulations and

Directives

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

The relevant VDE, EN and IEC standards must be adhered to when connecting the heat pump to the power supply or carrying out maintenance work. Any further connection requirements stipulated by local utility companies must also be observed.

When connecting the heating system, all applicable regulations must also be adhered to.

ATTENTION!

Never install the device in rooms in which there are any permanent ignition sources.

ATTENTION!

When transporting the heat pump, ensure that it is not tilted more than 45° (in any direction).

ATTENTION!

The heat pump and transport pallet are only joined by the packing film.

ATTENTION!

Any work on the heat pump may only be performed by authorised and qualified after-sales service technicians.

Persons, especially children, who are not capable of operating the device safely due to their physical, sensory or mental abilities or their inexperience or lack of knowledge, must not operate this device without supervision or instruction by the person in charge.

Children must be supervised to ensure that they do not play with the device.

ATTENTION!

Do not restrict or block the area around the air intake or outlet.

ATTENTION!

Ensure that there is a clockwise rotating field: Operating the compressor in the wrong rotational direction could cause damage to the compressor.

ATTENTION!

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

ATTENTION!

We recommend the installation of a suitable corrosion protection system to prevent the formation of deposits (e.g. rust) in the condenser of the heat pump.

ATTENTION!

The refrigerating circuit may not be damaged in any way.

ATTENTION!

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

1.3Energy-Efficient Use of the

Heat Pump

With the purchase of this heat pump you are helping to protect the environment. A prerequisite for energy-efficient operation is the correct design of the heat source system and heating system (radiators and circulation pump).

It is particularly important for the efficiency of a heat pump to keep the temperature difference between heating water and heat source as small as possible. For this reason, it is advisable to design the heat source and heating system very carefully. A temperature difference of approx. one Kelvin increases the power consumption by around 2.5%. When designing the heating system, it should be borne in mind that special consumers such as e.g. domestic hot water preparation should also be taken into consideration and dimensioned for low temperatures.

Underfloor heating systems (panel heating) are optimally suited for heat pump use on account of the low flow temperatures (30 °C to 40 °C).

It is important to ensure that the heat exchangers are not contaminated during operation because this increases the temperature difference, in turn reducing the COP.

Correct adjustment of the heat pump controller is also important for energy-efficient use of the heat pump. Further information can be found in the heat pump controller’s operating instructions.

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3.1

2Purpose of the Heat Pump

2.1Application

The air-to-water heat pump is designed for use in existing or newly built heating systems.

It is designed exclusively for heating domestic hot water and heating water!

The heat pump is suitable for mono energy and bivalent operation down to an external temperature of -20 °C.

Proper defrosting of the evaporator is guaranteed by maintaining a heating water return flow temperature of more than 13 °C during continuous operation.

The heat pump is not designed for the increased heat consumption required when a building is being dried out. The additional heat consumption should be met using special devices provided by the customer. If a building is to be dried out in autumn or winter, we recommend installing an additional heating element (available as an accessory).

ATTENTION!

The device is not suitable for operation with a frequency converter.

2.2Operating Principle

Surrounding air is drawn in by the ventilator and fed via the evaporator (heat exchanger). The evaporator cools the air, i.e. it extracts heat from it. This extracted heat is then transferred to the working medium (refrigerant) in the evaporator.

The heat is “pumped” to a higher temperature level by increasing its pressure with the aid of the electrically driven compressors. It is then transferred to the heating water using the liquifier (heat exchanger).

Electrical energy is used to raise the temperature of the heat in the environment to a higher level. Because the energy extracted from the air is transferred to the heating water, this type of device is called an air-to-water heat pump.

The air-to-water heat pump consists of the main components evaporator, ventilator and expansion valve, as well as the lownoise compressors, liquifier and electrical control system.

At low ambient temperatures, humidity accumulates on the evaporator in the form of frost reducing the transfer of heat. The evaporator is defrosted automatically by the heat pump as required. Steam may be emitted from the air outlet depending on the atmospheric conditions.

3 Scope of Delivery

3.1Basic Device

The heat pump is of compact design and is supplied complete with the components listed below.

R290 (propane) is used as refrigerant.

 

 

 

1)Evaporator

2)Ventilator

3)Switch box

4)Compressor

5)Liquifier

6)Expansion valve

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English

3.2

3.2Switch Box

The switch box is located in the heat pump. All electrical components are accessible after the front cover and the switch box cover have been removed.

The switch box contains the supply connection terminals, the plug connector for the control line, as well as the power contactors and the soft starter unit.

3.3Heat Pump Controller

Use the heat pump controller included in the scope of supply to operate the air-to-water heat pump.

The heat pump controller is a convenient electronic regulation and control device. It controls and monitors the entire heating system on the basis of the external temperature, including domestic hot water preparation and safety systems.

The customer must install the return temperature sensor and the external temperature sensor, which are supplied with the heat pump controller / with these instructions together with the necessary fixing accessories.

The enclosed operating instructions describe the function and use of the heat pump controller.

4 Transport

ATTENTION!

Never install the device in rooms in which there are any permanent ignition sources.

ATTENTION!

When transporting the heat pump, ensure that it is not tilted more than 45° (in any direction).

Use a wooden pallet for transporting the heat pump to the final installation location. The basic device can be transported with a lift truck, hand truck or by means of 3/4" pipes fed through the holes in the base plate or frame.

ATTENTION!

The heat pump and transport pallet are only joined by the packing film.

Before using the transport holes in the frame, it is necessary to remove the lower side panel assemblies. This is done by loosening each of the two screws at the base and then withdrawing the panels by unhooking them from above. Rehang the panels by gently pushing them in an upwards direction.

Be careful not to damage any components when inserting the pipes through the frame.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Opening the cover

Closing the cover

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6.2

5 Set-up

5.1General Information

The heat pump is suited for outdoor installation. The device should always be installed on a permanently smooth, even and horizontal surface and must be aligned vertically. The entire frame should lie directly on the ground to ensure a good soundproof seal and to prevent the water-bearing components from becoming too cold. If this is not the case, additional insulation measures may be necessary. It must be possible to carry out maintenance work without hindrance. This can be ensured by maintaining a clearance of 1.2 m to any fixed walls.

P

P

P

P

ATTENTION!

Do not restrict or block the area around the air intake or outlet.

5.2Condensed Water Pipe

Condensed water that forms during operation must be drained off frost-free. The heat pump must be mounted on a level plane to guarantee proper drainage. The condensed water pipe must have a minimum diameter of 50 mm and should be fed frost-free into a sewer. Condensate should not be discharged directly into clearing tanks and cesspits because the aggressive vapours could destroy the evaporator.

6 Installation

6.1General Information

The following connections need to be established on the heat pump:

Flow and return flow of the heating system

Condensate outflow

Control line to the heat pump controller

Power supply

6.2Heating System Connection

The heating system connections on the heat pump have a 1 1/4" external thread.

Route the connection hoses out of the device in a downwards direction. Use a spanner to firmly grip the transitions when connecting the heat pump. After the heat pump has been installed, the ductwork must be sealed so that the connection is gastight.

Before connecting the heating water system to the heat pump, the heating system must be flushed to remove any impurities, residue from sealants, etc., and to prevent any accumulation of deposits in the liquifier. A contaminated liquifier may cause the heat pump to completely break down. For systems in which the heating water flow can be shut off via the radiator or thermostat valves, an overflow valve must be installed in a heating bypass downstream from the heat pump by the customer. This ensures a minimum heating water flow rate through the heat pump and helps to avoid faults.

Once the heating system has been installed, it must be filled, deaerated and pressure-tested (in the heat pump the air-relief cock is located at or in the water pipes at the condenser).

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Minimum heating water flow rate

The minimum heating water flow rate through the heat pump must be assured in all operating states of the heating system. This can be accomplished, for example, by installing either a manifold without differential pressure or an overflow valve. The procedure for adjusting an overflow valve is described in the Chapter Start-up.

Antifreeze

Manual drainage should be provided for heat pumps which are exposed to frost. The antifreeze function of the heat pump controller is active whenever the controller and the heat circulating pump are ready for operation. If the heat pump is taken out of service or in the event of a power failure, the system has to be drained, and if required, blown out, at three locations (see illustration). The heating circuit should be operated with a suitable antifreeze if heat pump systems are implemented in buildings where a power failure can not be detected (holiday home).

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6.3

 

 

 

 

English

 

 

6.3Electrical Connection

A standard four-core cable is used for connecting the heat pump to the power supply.

The power supply and the control line are normally installed in the ground (in ductwork with a suitable size and resistance) and routed from the heat pump to the building. This ductwork must extend into the heat pump by approx. 22 mm and be installed with a continuous downward slope in order to comply with Section 42 of the VDE 0100 regulations. Instead of 90° bends, two 45° bends must be used as pipe bends. The control line and the cable for the power supply are drawn into this ductwork.

The cable (power supply) must be provided by the customer. The conductor cross section is selected in accordance with the power consumption of the heat pump (see Appendix Device Information) and the applicable VDE (EN) and VNB regulations.

The power supply line on the heat pump must be fed through the provided cable feedthrough into the switch box. The line must be firmly screwed to its feedthrough (vapour sealed pipe union).

An all-pole disconnecting device with a contact gap of at least 3 mm (e.g. utility blocking contactor or power contactor) as well as a 3-pole circuit breaker with common tripping for all external conductors must be installed in the power supply (tripping current in compliance with the Device Information). Ensure that the incoming supply has a clockwise rotating field when connecting multiphase devices.

Phase sequence: L1, L2, L3.

ATTENTION!

Ensure that there is a clockwise rotating field: Operating the compressor in the wrong rotational direction could cause damage to the compressor.

The control voltage is supplied via the heat pump controller.

The heat pump controller has a 230 V AC-50 Hz power supply. Connect the controller in compliance with its own operating instructions (16 A fuse).

The control line (not included in scope of supply) is connected to the heat pump controller using the two rectangular plug connectors. Use the plug connector located on the base of the heat pump adjacent to the cable gland in the base plate. More detailed information can be found in the operating instructions of the heat pump controller.

For detailed information, see Circuit Diagrams in the Appendix.

7 Start-up

7.1General Information

To ensure that start-up 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 extending the guarantee (see Warranty Service).

7.2Preparation

The following items need to be checked prior to start-up:

The heat pump must be fully connected, as described in Chapter 6.

All valves that 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 ventilator must turn in the direction indicated by the arrow.

The settings of the heat pump controller must be adapted to the heating system in accordance with the controller’s operating instructions.

Ensure the condensate outflow functions.

7.3Procedure

The heat pump is started up via the heat pump controller. Adjustments should be made in compliance with the instructions.

If an overflow valve is fitted to maintain the minimum heating water flow rate, the valve must be adapted to the requirements of the heating system. Incorrect adjustment can lead to faulty operation and increased energy consumption. We recommend carrying out the following procedure to correctly adjust the overflow valve:

Close all of the heating circuits that may also be closed during operation (depending on the type of heat pump usage) so that the most unfavourable operating state - with respect to the water flow rate - is achieved. This normally means the heating circuits of the rooms on the south and west sides of the building. At least one heating circuit must remain open (e.g. bathroom).

The overflow valve should be opened far enough to produce the maximum temperature spread between the heating flow and return flow listed in the following table for the current heat source temperature. The temperature spread should be measured as close as possible to the heat pump. The heating element of mono energy systems should be disconnected.

Heat source

Max. temperature spread

temperature

between heating flow and return

From

To

flow

-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

 

 

 

E-6

8.2

Any faults occurring during operation are also displayed on the heat pump controller and can be corrected as described in the operating instructions of the heat pump controller.

For external temperatures below 10 °C and heating water temperatures below 16 °C, the buffer tank should be heated up with the second heat generator to at least 25 °C.

Observe the following procedure to implement a smooth start-up:

1)Close all of the heating circuits.

2)Fully open the overflow valve.

3)Use the controller to select the automatic operating mode.

4)Wait until the buffer tank has reached a temperature of at least 25 °C.

5)Now slowly reopen the heating circuit valves in succession so that the heating water throughput 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.

8 Maintenance / Cleaning

8.1Maintenance

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

ATTENTION!

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

To prevent faults due to sediment in the heat exchanger of the heat pump, ensure that the heat exchanger in the heating system can not be contaminated. In the event that operating malfunctions due to contamination still occur, the system should be cleaned as described below. The device may only be cleaned according to the following instructions from the manufacturer.

6)Set the minimum volume flow quantity on the overflow valve and heat circulating pump when all heating circuits are fully open and a heating water temperature in the buffer tank of approx. 20 °C is maintained.

7)New buildings have an increased heat consumption on account of the energy required to dry them out. This increased heat consumption means that marginally dimensioned heating systems can not always achieve the desired room temperature. In such cases, we recommend keeping a second heat generator on standby during the first heating period. The limit temperature on the heat pump controller should also be turned up to 15 °C.

8.2Cleaning 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 products enter the heating system via the valves, the circulating pumps and/or plastic pipes. It is therefore essential - in particular with respect to the piping of underfloor heating systems - that only diffusion-proof materials are used.

ATTENTION!

We recommend the installation of a suitable corrosion protection system to prevent the formation of deposits (e.g. rust) in the condenser of the heat pump.

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

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

According to today’s state of knowledge, 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 either case, 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 flow of the liquifier of the heat pump.

It is 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 great care and all relevant regulations of the employers’ liability insurance associations must be adhered to.

If in doubt, contact the manufacturer of the chemicals!

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