Glen Dimplex LA 3860 Guía del usuario

Order no.: 452167.66.48-EN EN · FD 0305

LA 3860

Installation and

Operating Instruction

Air-to-Water

Heat Pump for

Outdoor Installation

Glen

Dimplex

Deutschland

Dimplex

www.dimplex.de 452167.66.48-EN · FD 0305 EN-1

LA 3860 English

Table of contents

1 Safety notes..................................................................................................................................................EN-2

1.1 Symbols and markings...................................................................................................................................................EN-2

1.2 Intended use......................................................................................................................................................................EN-2

1.3 Legal regulations and directives .................................................................................................................................EN-2

1.4 Energy-efficient use of the heat pump.....................................................................................................................EN-2

2 Purpose of the heat pump ........................................................................................................................EN-3

2.1 Application .........................................................................................................................................................................EN-3

2.2 Operating principle..........................................................................................................................................................EN-3

3 Scope of supply ...........................................................................................................................................EN-4

3.1 Basic device .......................................................................................................................................................................EN-4

3.2 Switch box ..........................................................................................................................................................................EN-4

3.3 Heat pump manager .......................................................................................................................................................EN-4

4 Transport .......................................................................................................................................................EN-5

5 Installation ....................................................................................................................................................EN-5

5.1 General.................................................................................................................................................................................EN-5

5.2 Condensate pipe ..............................................................................................................................................................EN-6

6 Assembly .......................................................................................................................................................EN-6

6.1 General.................................................................................................................................................................................EN-6

6.2 Connection on heating side .........................................................................................................................................EN-6

6.3 Water Quality in Heating Systems..............................................................................................................................EN-6

6.4 Electrical connection ......................................................................................................................................................EN-9

7 Start-up....................................................................................................................................................... EN-10

7.1 General.............................................................................................................................................................................. EN-10

7.2 Preparation...................................................................................................................................................................... EN-10

7.3 Procedure ........................................................................................................................................................................ EN-10

8 Cleaning / maintenance ......................................................................................................................... EN-11

8.1 Maintenance ................................................................................................................................................................... EN-11

8.2 Cleaning the heating system .................................................................................................................................... EN-11

8.3 Cleaning the air system............................................................................................................................................... EN-12

9 Faults / troubleshooting......................................................................................................................... EN-12

10 Decommissioning / disposal ................................................................................................................. EN-12

11 Device information .................................................................................................................................. EN-13

12 Product information as per Regulation (EU) No 813/2013, Annex II, Table 2........................... EN-15

13 Dimension Drawings................................................................................................................................ EN-16

13.1 Dmension Drawing ....................................................................................................................................................... EN-16

14 Diagrams .................................................................................................................................................... EN-17

14.1 Characteristic curves for heating operation ........................................................................................................ EN-17

14.2 Operating limits diagram heating ............................................................................................................................ EN-18

15 Integration diagram ................................................................................................................................. EN-19

15.1 Hydraulic integration diagrams ................................................................................................................................ EN-19

15.2 Legend.............................................................................................................................................................................. EN-20

16 Declaration of Conformity ..................................................................................................................... EN-21

EN-2 452167.66.48-EN · FD 0305 www.dimplex.de

English LA 3860

1Safetynotes

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

ºººº

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 Intended use

This device is only intended for use as specified by the manu-

facturer. Any other use beyond that intended by the manufac-

turer is prohibited. This requires the user to abide by the rele-

vant project planning documents. Please refrain from

tampering with or altering the device.

1.3 Legal regulations and directives

This heat pump is designed for use in a domestic environment

according to Article 1, Paragraph 2 k) of EU directive 2006/42/

EC (machinery directive) and is thus subject to the require-

ments 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, in agri-

cultural establishments and in hotels, guest houses and similar

/ other residential buildings.

The construction and design of the heat pump complies with all

relevant EU directives, DIN/VDE regulations (see CE declaration

of conformity).

When connecting the heat pump to the power supply, the rele-

vant VDE, EN and IEC standards are to be adhered to. Any fur-

ther connection requirements stipulated by the network opera-

tor must also be observed.

When connecting the heating system, all applicable regulations

must also be adhered to.

This unit can be used by children aged 8 and over and by per-

sons 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 su-

pervision.

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.

1.4 Energy-efficient use of the heat

pump

By operating this heat pump, you are helping to protect the en-

vironment. A prerequisite for energy-efficient operation is the

correct design of the heat source system and heating system.

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 (one °C) in-

creases the power consumption by around 2.5 %. When de-

signing the heating system, it should be borne in mind that spe-

cial 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 con-

taminated during operation because this increases the temper-

ature difference, in turn reducing the COP.

Correct adjustment of the heat pump manager is also impor-

tant for energy-efficient use of the heat pump. Further informa-

tion can be found in the operating instructions of the heat

pump manager.

www.dimplex.de 452167.66.48-EN · FD 0305 EN-3

LA 3860 English

2 Purpose of the heat pump

2.1 Application

The air-to-water heat pump is to be used exclusively for the

heating and cooling of heating water. It can be used in new or

existing heating systems.

The circulating pump(s) must be controlled using the heat

pump manager.

If function-relevant or safety-relevant pump functions, such as

integration of the heat pump into the building management

system, are not supported, then this can result in loss of war-

ranty and cause a write-off of the heat pump.

The circulating pump(s) and the heat pump controller must al-

ways be ready for operation.

The specifications in the technical documents must be fol-

lowed, particularly limit values for the minimum and – if availa-

ble – maximum warm/cold water volume flow.

The heat pump is suitable for mono-energy and bivalent opera-

tion down to an external temperature of -22 °C.

Proper defrosting of the evaporator is guaranteed by maintain-

ing a heating water return temperature of more than 22 °C dur-

ing continuous operation.

The heat pump is not designed for the increased heat con-

sumption required when a building is being dried out. For this

reason, the additional heat consumption should be met using

special devices provided by the customer. For drying out build-

ings in autumn or winter, we recommend installing a suitable

2nd heat generator (e.g. electric heating element available as an

accessory).

NOTE

ºººº

The device is not suitable for operation with a frequency

converter.

2.2 Operating principle

Surrounding air is drawn in by the fan and fed through the evap-

orator (heat exchanger). The evaporator cools the air, i.e. it ex-

tracts heat from it. This extracted heat is then transferred to the

working medium (refrigerant) in the evaporator.

The heat is brought to a higher temperature level by increasing

its pressure with the aid of the electrically driven compressor. It

is then transferred to the heating water via the liquefier (heat

exchanger).

Electrical energy is used to raise the temperature of the heat in

the environment to a higher level. As 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 low-

noise compressors, the liquefier and the electrical control sys-

tem.

At low ambient temperatures, humidity accumulates on the

evaporator in the form of frost, reducing the transfer of heat.

Uneven accumulation during this process does not indicate a

fault. The evaporator is defrosted automatically by the heat

pump as required. Steam may be emitted from the air outlet de-

pending on the atmospheric conditions.

EN-4 452167.66.48-EN · FD 0305 www.dimplex.de

English LA 3860

3 Scope of supply

3.1 Basic device

The heat pump contains the components listed below.

The refrigeration circuit is "hermetically sealed" and contains

the fluorinated refrigerant R407C included in the Kyoto proto-

col. Information on the GWP value and CO2equivalent of the

refrigerant can be found in the chapter Device information. The

refrigerant is CFC-free, non-ozone depleting and non-combus-

tible.

1) Evaporator

2) Liquefier

3) Fan

4) Switch box

5) Compressor 1

6) Compressor 2

7) Filter dryer

8) Expansion valve

9) Inner heat exchanger

10) Collector

11) Dirt trap

3.2 Switch box

The switch box is located in the heat pump. It can be swung out

after removing the lower front cover and loosening the fasten-

ing screw located in the upper left-hand corner.

The switch box contains the supply connection terminals as

well the power contactors and the soft starter unit.

3.3 Heat pump manager

Use the heat pump manager included in the scope of supply to

operate the air-to-water heat pump.

The heat pump manager is a convenient electronic regulation

and control device. It controls and monitors the entire heating

system based on the external temperature, as well as domestic

hot water preparation and safety systems.

The customer must install the external temperature sensor,

which is included in the scope of supply of the unit heat pump

and heat pump manager together with the necessary fixing ac-

cessories.

The enclosed operating instructions describe the function and

use of the heat pump manager.

www.dimplex.de 452167.66.48-EN · FD 0305 EN-5

LA 3860 English

4Transport

CAUTION!

When transporting the heat pump, ensure that it is not tilted

more than 45° (in any direction).

Transport to the final installation location should be carried out

with a pallet. The basic device can be transported with a lift

truck or a crane.

The transport eyebolts must be removed after crane transport,

and the openings must be closed using the vent plugs supplied.

After transportation, the transport fastening in the device is to

be removed from both sides of the base.

CAUTION!

Before start-up, the transport fastening must be removed.

5 Installation

5.1 General

The device must be installed on a permanently level, smooth

and horizontal surface. The frame around the device must lie

tightly against the floor to guarantee adequate sound insula-

tion, to prevent water-bearing parts from cooling out and to

protect the inside of the device from small animals. If this is not

the case, additional insulation measures may be necessary. To

prevent small animals from entering the inside of the device, it

may be necessary to seal the connection hole in the base plate,

for example. Furthermore, the heat pump should be set up so

that the air outlet direction of the ventilator is perpendicular to

the main wind direction to allow unrestricted defrosting of the

evaporator. The heat pump is designed for installation on even

ground. If the installation conditions differ (installation on a

platform or flat roof) or there is a greater risk of the heat pump

tipping over (due to an exposed position or high wind expo-

sure), additional protection against tipping over must be pro-

vided. The responsibility for the

heat pump installation lies with the specialist system construc-

tion company. During the installation, local requirements such

as building regulations, static load of the building, and wind ex-

posure must be accounted for.

It must be possible to carry out maintenance work without hin-

drance. This is ensured when observing the distances to solid

walls as shown in the figure.

The specified dimensions are valid for stand-alone installation

only.

NOTE

ººººº

The heat pump is not intended for use above 2000 metres

(mean sea level).

CAUTION!

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

CAUTION!

Observe country-specific building regulations!

Remove/screw in

transport lock (4x)

1,0 m 2 m

≥

0,8m

EN-6 452167.66.48-EN · FD 0305 www.dimplex.de

English LA 3860

CAUTION!

For installation close to walls the physical influences of the

building must be considered. No windows or doors should be

present in the area surrounding the air outlet of the ventilator.

CAUTION!

In cases of installation close to a wall, there may be more

sediment in the air inlet and outlet areas due to the air current.

The colder outside air outlet should discharge in such a way as

to not increase the heat losses in heated neighbouring rooms.

CAUTION!

Installation in a hollow or in an inner courtyard is not

permitted because cooled air collects at ground level and is

drawn in again by the heat pump during lengthy operation.

5.2 Condensate pipe

Condensate that forms during operation must be drained off

frost-free. To ensure proper drainage, the heat pump must be

mounted horizontally. The condensate pipe must have a mini-

mum diameter of 50 mm and must be fed into a sewer in such

a way that it is safe from frost. Do not discharge the condensate

directly into clearing tanks or cesspits, as aggressive vapours or

a condensed water pipe which has not been laid in a frost-free

manner could destroy the evaporator.

CAUTION!

The frost line can vary according to the climatic region. The

regulations of the countries in question must be observed.

6 Assembly

6.1 General

The following connections need to be established on the heat

pump:

Heating system flows and returns

Condensate outflow

Control line to the heat pump manager

Voltage supply

6.2 Connection on heating side

The heating system connections on the heat pump are to be

made inside the device. Refer to the device information for the

connection sizes. Route the connection hoses out of the device

in a downwards direction. An optional pipe kit is available as an

accessory, which can be used to lead the connections out to

the side.

Use a spanner to firmly grip the transitions when connecting

the heat pump.

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 could cause the heat pump to completely break down.

Once the heat pump has been connected to the heating sys-

tem, it must be filled, de-aerated and pressure-tested.

NOTE

ººººº

Pump units with check valves maintain the specified flow

directions. If there is incorrect distribution or breaking off of

the volume flow, these units (and the check valves in

particular) must be checked! The use of check valves are

mandatory in the event of several heating circuits or parallel

connections for heat pumps in order to avoid incorrect

distribution.

6.3 Water Quality in Heating

Systems

6.3.1 Scale Formation

Scale formation in heating systems cannot be avoided, but in

systems with flow temperatures below 60 °C the problem is so

small that it is negligible. With high-temperature heat pumps

and in particular with bivalent systems in the higher perfor-

mance range (heat pump + boiler combination), flow tempera-

tures of 60 °C and more can be achieved. One preferred

method for preventing scale formation is softening because

this permanently removes alkaline earths (calcium and magne-

sium ions) from the heating system.

The following values for water quality in heating water and cold

water must be observed and checked during an on-site check:

Degree of hardness

Conductivity

pH value

Filterable materials

The following (limit) values must absolutely be observed:

Maximum degree of hardness in filling water and supple-

mentary water 11 dGH.

The conductivity in demineralised water (DM water) (low-

salt) may not be greater than 100 μS/cm.

The conductivity in partially demineralised water (saline)

may not be greater than 500 μS/cm.

The pH value must be between 8.2 and 9.

The limit value for filterable materials in heating water is <

30 mg/l

Frost line

Condensate drain

Flow and return

Electric cables

Heat pump

0,20 m

Control and main cables

www.dimplex.de 452167.66.48-EN · FD 0305 EN-7

LA 3860 English

If necessary, for example in bivalent systems, the specifications

listed in the table below must also be observed, or the precise

guidelines for filling water and supplementary water and the

total hardness must be taken from the table in accordance with

VDI 2035 – Sheet 1.

NOTE

ºººº

The specific volumes of a heating system must be determined

before filling the system.

The saturation index SI is used to determine whether water has

a tendency towards lime dissolution or lime separation. This

shows whether the pH value corresponds to a neutral pH point

or by how much it undershoots it due to excess acid or by how

much it exceeds it due to carbonic acid deficit. At a saturation

index below 0, the water is aggressive and will tend towards

corrosion. At a saturation index above 0, the water is calcare-

ous.

The saturation index SI should be between - 0.2 < 0 < 0.2

Fig. 6.1:Guideline values for filling and supplementary in accordance with

VDI 2035

CAUTION!

When using demineralised water, ensure that the minimum

permissible pH value of 8.2 is not undershot. Failure to comply

with this value can result in the heat pump being destroyed.

6.3.2 Corrosion

The VDI 2035 recommends the use of partially demineralised

water or demineralised water in systems with larger-than-aver-

age specific system volumes of 50 l/kW.

These measures (e.g. pH stabilizers) are implemented to set the

pH value of the heating water to minimise the risk of corrosion

in the heat pump and in the heating system.

Irrespective of the legal requirements, the following limit values

in the heating water used for various substances must not be

undershot or exceeded. This is to ensure safe operation of the

heat pump. A water analysis must be carried out before com-

missioning the system. If the water analysis produces a "-" for a

maximum of one indicator or a "o" for a maximum of two indica-

tors, the analysis must be classed as negative.

Filling and supplementary water as well as heating water, depending on

heat output

Overall heat output in kW

Total alkaline earths in mol/m³

(Total hardness in dGH)

 20 20 to 50 50

Specific system volume in l/kW

Heat output 1

1. For the purpose of calculating the specific system volume, the smallest indi-

vidual heat output is to be used for systems with several heat generators.

50

specific water content

heat generator > 0.3 k per kW 2

2. In systems with several heat generators with different specific water con-

tents, the smallest specific water content is decisive.

none 3.0 (16.8)

< 0.05 (0.3)

50

specific water content

heat generator > 0.3 k per kW 2

(e.g. circulating water heaters)

and systems with electric heat-

ing elements

3.0 (16.8) 1.5 (8.4)

> 50 kW to 200 kW 2.0 (11.2) 1.0 (5.6)

> 200 kW to 600 kW 1.5 (8.4)

< 0.05 (0.3)

> 600 kW < 0.05 (0.3)

Heating water, depending on heating output

Operating mode Electrical conductivity in µS/cm

Low-salt 3

3. Full softening is recommended for systems with aluminium alloys.

> 10 to 100

Containing salt > 100 to 1500

Appearance

clear, free from sedimentary substances

Evaluation characteristic

Concentration

range

(mg/l or ppm)

Stain-

less steel Copper

Bicarbonate (HCO3-)< 70 + o

70 - 300 + +

> 300 + o

Sulphate (SO42-)< 70 + +

70 - 300 o o/-

> 300 - -

Hydrogencarbonate/sulphate

HCO3-/SO42-

> 1.0 + +

< 1.0 o -

Electrical conductivity 1< 10 µS/cm o o

10 - 500 µS/cm + +

> 500 µS/cm o o

pH value 2< 6.0 - -

6.0 - 8.2 o o

8.2 - 9.0 + +

> 9.0 o o

Ammonium (NH4+)< 2 + +

2 - 20 o o

> 20 - -

Chloride ions (Cl-)< 50 + +

50 - 150 o o

> 150 - -

Free chlorine (Cl2)< 0.5 + +

0.5 - 5 - o

> 5 - -

Hydrogen sulphide (H2S) < 0.05 + +

> 0.05 + o/-

Carbon dioxide (CO2)< 5 + +

5 - 10 + o

> 10 o -

Nitrate (NO3-)< 100 + +

> 100 o o

Iron (Fe) < 0.2 + +

> 0.2 o o

Aluminium (Al) < 0.2 + +

> 0.2 + o

Manganese (Mn) < 0.05 + +

> 0.05 o o

EN-8 452167.66.48-EN · FD 0305 www.dimplex.de

English LA 3860

Fig. 6.2:Limit values for the quality of heating water

Resistance of copper-soldered or welded stainless-steel plate

heat exchangers to the substances present in water:

Notes

"+" = Normally good resistance

"o" = Corrosion problems may arise,particularly if several

factors receive an evaluation of "o"

"-" = Should not be used

NOTE

ºººº

The water quality should be checked again after 4 to 6 weeks,

as the quality could change during the first few weeks of

operation due to chemical reactions.

NOTE

ºººº

It is mandatory to use hydraulically closed systems. It is not

permissible to use any open hydraulic systems!

Note:

The hot water connections must be established according to

the dimensional drawing (see Cap. 13.1 on page 16) in the

countercurrent principle.

Important:

The notes/settings in the instructions of the heat pump man-

ager must always be observed and carried out accordingly; not

doing so will lead to malfunctions.

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

dual differential pressureless manifold or an overflow valve. The

procedure for setting an overflow valve is described in the

chapter "Commissioning". When the minimum heating water

flow rate is undershot, the plate heat exchanger in the refriger-

ation circuit can freeze, which can lead to total loss of the heat

pump.

The nominal flow rate is specified depending on the max. flow

temperature in the device information and must be taken into

account during planning.

The specified “Minimum heating water flow rate for pump siz-

ing” (See “Device information” on page 13.) must be ensured

during defrosting and cooling operation. 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.

Antifreeze

Heat pump systems, which cannot be guaranteed to be frost-

free, should be equipped with a drainage option (see Fig.). The

antifreeze function of the heat pump manager is active when-

ever the heat pump manager and the heat circulating pump are

ready for operation. When decommissioning the heat pump, or

in the event of a power failure, the system must be drained

through the indicated points (see illustration); it may be neces-

sary to purge the system with compressed air. The heating cir-

cuit should be operated with a suitable antifreeze if heat pump

systems are implemented in buildings where a power failure

cannot be detected (holiday home).

Saturation Index < -0.2 o o

-0.2 - 0.1 + +

0.1 - 0.2 + o

> 0.2 o o

Filterable materials < 30 + +

> 30 - -

Total hardness < 6 °dGH o/+ o/+

6 - 11 °dGH + +

> 11 °dGH - -

Oxygen (O2)< 0.02 + +

< 0.1 +/o +/o

> 0.1 - -

Nitrite (NO2-)< 0.1 + +

> 0.1 - -

Sulphide (S2-)< 1.0 + +

> 1.0 - -

1. If the limit values in the VDI 2035 are more restrictive, these apply accord-

ingly.

2. When using demineralised water, ensure that the minimum permissible pH

value of 8.2 is not undershot. Failure to comply with this value can result in

the heat pump being destroyed.

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