REMKO LWM Series, LWM 80, LWM 110, LWM 150, LWM 110 Duo Operating And Installation Instructions

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Operating and installation instructions

REMKO LWM series

Monobloc heat pumps Air/water system for heating and cooling

LWM 80, LWM 110, LWM 150, LWM 110 Duo, LWM 150 Duo

Instructions for Technicians

0205-2019-07 Edition 1, en_GB

Read the instructions prior to performing any task!

R454B

Refrigerant

Read these operating instructions carefully before commissioning / using this device!

These instructions are an integral part of the system and must always be kept near or on the device.

Subject to modifications; No liability accepted for errors or misprints!

Translation of the original

1 Safety and usage instructions............................................................................................................. 4

1.1 General safety notes....................................................................................................................... 4

1.2 Identification of notes...................................................................................................................... 4

1.3 Personnel qualifications.................................................................................................................. 4

1.4 Dangers of failure to observe the safety notes................................................................................ 4

1.5 Safety-conscious working............................................................................................................... 5

1.6 Safety notes for the operator........................................................................................................... 5

1.7 Safety notes for installation, maintenance and inspection.............................................................. 5

1.8 Unauthorised modification and changes......................................................................................... 5

1.9 Intended use................................................................................................................................... 5

1.10 Warranty........................................................................................................................................ 6

1.11 Transport and packaging............................................................................................................... 6

1.12 Environmental protection and recycling........................................................................................ 6

2 Technical data........................................................................................................................................ 7

2.1 Unit data.......................................................................................................................................... 7

2.2 Product data.................................................................................................................................. 11

2.3 Unit dimensions of indoor units..................................................................................................... 13

2.4 Diagram, cooling cycle.................................................................................................................. 15

2.5 Heat pump usable limits in monovalent operation........................................................................ 16

2.6 Pump characteristics and circulation pump pressure losses........................................................ 16

2.7 Total sound power level................................................................................................................. 18

2.8 Characteristic curves..................................................................................................................... 21

3 Unit description................................................................................................................................... 31

Assembly............................................................................................................................................. 35

4.1 System layout................................................................................................................................ 35

4.2 General installation notes.............................................................................................................. 36

4.3 Set-up and assembly of the heat pump........................................................................................ 37

5 Hydraulic connection.......................................................................................................................... 42

6 Emergency-heat operation................................................................................................................. 46

7 Cooling with room temperature/humidity probe.............................................................................. 47

8 Water treatment................................................................................................................................... 48

9 Commissioning the refrigeration system......................................................................................... 50

10 Electrical wiring................................................................................................................................... 52

11 Before commissioning....................................................................................................................... 52

12 Commissioning................................................................................................................................... 53

13 Care and maintenance........................................................................................................................ 54

14 Temporary shutdown.......................................................................................................................... 54

15 Troubleshooting and customer service............................................................................................ 55

16 General view of unit and spare parts................................................................................................ 56

16.1 Exploded view of the unit LWM 80-150....................................................................................... 56

16.2 Spare parts LWM 80-150............................................................................................................ 57

17 General terms...................................................................................................................................... 59

18 Index..................................................................................................................................................... 61

REMKO LWM series

1 Safety and

usage instructions

1.1 General safety notes

Carefully read the operating manual before commissioning the units or their components for the first time. It provides useful tips and notes such as hazard warnings to prevent injury and material damage. Failure to follow manual can endanger persons, the environment and the equipment itself or its components and will void any claims for liability.

Store this manual and the information required for the operation of this system (e.g. refrigerant datasheet) in the vicinity of the unit.

The refrigerant used in the system is flammable. If applicable, observe the local safety conditions.

the directions in this

DANGER!

This combination of symbol and signal word warns of a situation in which there is immediate danger cause serious injury.

This combination of symbol and signal word warns of a potentially hazardous situation, which if not avoided may be fatal or cause serious injury

, which if not avoided may be fatal or

WARNING!

Warning of inflammable substances!

Identification of notes

1.2

This section provides an overview of all important safety aspects for proper protection of people and safe and fault-free operation.The instructions and safety notes contained within this manual must be observed in order to prevent accidents, personal injury and material damage.

Notes attached directly to the units must be observed in their entirety and be kept in a fully legible condition.

Safety notes in this manual are indicated by symbols. Safety notes are introduced with signal words which help to highlight the magnitude of the danger in question.

CAUTION!

This combination of symbol and signal word warns of a potentially hazardous situation, which if not avoided may cause injury or material and environmental damage.

NOTICE!

This combination of symbol and signal word warns of a potentially hazardous situation, which if not avoided may cause material and environmental damage.

This symbol highlights useful tips and recommendations as well as information for efficient and fault-free operation.

DANGER!

Contact with live parts poses an immediate danger of death due to electric shock. Damage to the insulation or individual components may pose a danger of death.

1.3 Personnel qualifications

Personnel responsible for commissioning, operation, maintenance, inspection and installation must be able to demonstrate that they hold a qualification which proves their ability to undertake the work.

Dangers of failure to observe

1.4 the safety notes

Failure to observe the safety notes may pose a risk to people, the environment and the units. Failure to observe the safety notes may void any claims for damages.

In particular, failure to observe the safety notes may pose the following risks:

n The failure of important unit functions. n The failure of prescribed methods of mainte-

nance and repair

n Danger to people on account of electrical and

mechanical effects.

1.5 Safety-conscious working

The safety notes contained in this manual, the existing national regulations concerning accident prevention as well as any internal company working, operating and safety regulations must be observed.

Safety notes for the operator

1.6

The operational safety of the units and components is only assured providing they are used as intended and in a fully assembled state.

n The units and components may only be set up,

installed and maintained by qualified personnel.

n Protective covers (grille) over moving parts

must not be removed from units that are in operation.

n Do not operate units or components with

obvious defects or signs of damage.

n Contact with certain unit parts or components

may lead to burns or injury

n The units and components must not be

exposed to any mechanical load, extreme levels of humidity or extreme temperature.

n Spaces in which refrigerant can leak sufficient

to load and vent. Otherwise there is danger of suffocation.

n All housing parts and device openings, e.g. air

inlets and outlets, must be free from foreign objects, fluids or gases.

n The units must be inspected by a service tech-

nician at least once annually. Visual inspections and cleaning may be performed by the operator when the units are disconnected from the mains.

1.7 Safety notes for installation, maintenance and inspection

n Appropriate hazard prevention measures must

be taken to prevent risks to people when performing installation, repair cleaning work on the units.

n The setup, connection and operation of the

units and its components must be undertaken in accordance with the usage and operating conditions stipulated in this manual and comply with all applicable regional regulations.

, maintenance or

n Regional regulations and laws as well as the

ater Ecology Act (WHG) must be observed.

n Only install and store the units in rooms larger

than 4 m2. With a failure to comply, leaks may result in the room filling with a flammable mixture! The minimum room size of 4 m2 required for installation and storage pertains to the basic fill quantity of the unit. This varies according to the installation type and total fill quantity of the system. The calculation must take place in accordance with valid DIN standards. Make sure that the installation site is suitable for safe unit operation.

n The electrical power supply should be adapted

to the requirements of the units.

n Units may only be mounted at the points pro-

vided for this purpose at the factory. The units may only be secured or mounted on stable structures, walls or floors.

n Mobile units must be set up securely on suit-

able surfaces and in an upright position. Stationary units must be permanently installed for operation.

n The units and components should not be oper-

ated in areas where there is an increased risk of damage. Observe the minimum clearances.

n The units and components must be kept at an

adequate distance from flammable, explosive, combustible, abrasive and dirty areas or atmospheres.

n Safety devices may not be modified or

bypassed.

1.8 Unauthorised modification and changes

Modifications or changes to units and components are not permitted and may cause malfunctions. Safety devices may not be modified or bypassed. Original replacement parts and accessories authorised by the manufactured ensure safety use of other parts may invalidate liability for resulting consequences.

. The

1.9 Intended use

Depending on the model, the equipment and the additional fittings with which it is equipped is only intended to be used as an air-conditioner for the purpose of cooling or heating the air in an enclosed room.

Any different or additional use shall be classed as non-intended use. The manufacturer/supplier assumes no liability for damages arising from such use. The user bears the sole risk in such cases. Intended use also includes working in accordance with the operating and installation instructions and complying with the maintenance requirements.

REMKO LWM series

Under no circumstances should the threshold values specified in the technical data be exceeded.

1.10

For warranty claims to be considered, it is essential that the ordering party or its representative complete and return the "certificate of warranty" to REMKO GmbH & Co. KG at the time when the units are purchased and commissioned.

The warranty conditions are detailed in the "General business and delivery conditions". Furthermore, only the parties to a contract can conclude special agreements beyond these conditions. In this case, contact your contractual partner in the first instance.

Warranty

1.11 Transport and packaging

The devices are supplied in a sturdy shipping container. Please check the equipment immediately upon delivery and note any damage or missing parts on the delivery and inform the shipper and your contractual partner. For later complaints can not be guaranteed.

1.12 Environmental protection and recycling

Disposal of packaging

All products are packed for transport in environmentally friendly materials. Make a valuable contribution to reducing waste and sustaining raw materials. Only dispose of packaging at approved collection points.

Disposal of equipment and components

Only recyclable materials are used in the manufacture of the devices and components. Help protect the environment by ensuring that the devices or components (for example batteries) are not disposed in household waste, but only in accordance with local regulations and in an environmentally safe manner, e.g. using certified firms and recycling specialists or at collection points.

WARNING!

Plastic films and bags etc. are dangerous toys for children!

Why:

- Leave packaging material are not around.

- Packaging material may not be accessible to children!

2 Technical data

2.1 Unit data

Series LWM 80 LWM 110 LWM 150

Function Heating or Cooling

System Air/water

Heat pump manager Smart Control Touch

Drinking water tank enamelled optional

Auxiliary heater installed/rated output kW optional 7.5

Domestic hot-water heating (changeover valve)

Connection oil/gas boiler changeover valve

Heating capacity min./max. kW 0.6-8.0 2.0-10.7 3.0-14.5

Heating capacity/COP

with A12/W35 kW/COP 7.5/5.65 9.18/5.57 11.0/5.58

with A7/W35 kW/COP 6.25/5.10 8.04/5.02 10.28/5.03

with A2/W35 kW/COP 4.33/4.09 6.35/4.04 8.33/4.11

with A-7/W35 kW/COP 3.82/3.55 5.57/3.42 7.85/3.57

with A-15/W35 kW/COP 2.6/2.95 4.47/2.82 6.5/2.97

with A7/W45 kW/COP 6.05/3.96 7.87/3.88 10.09/3.89

with A-7/W45 kW/COP 3.73/2.96 5.51/2.83 7.76/2.98

with A7/W55 kW/COP 5.68/3.20 7.50/3.12 9.72/3.13

with A-7/W55 kW/COP 3.64/2.49 5.42/2.36 7.67/2.51

with A10/W35 kW/COP 6.80/5.43 8.55/5.31 10.60/5.32

Cooling capacity min./max. kW 1.1-8.9 3.3-11.9 5.5-14.0

Cooling capacity/EER

optional

with A35/W7 kW/EER 4.90/2.81 7.63/2.73 12.20/2.65

with A35/W18 kW/EER 5.70/3.61 8.24/3.71 12.77/3.81

with A27/W18 kW/EER 5.80/3.92 10.71/4.00 18.20/4.11

Usable limits, heating °C -23 to +37

Service limits, cooling °C +15 to +45

Inlet temperature, heating water, max. °C 65

Min. inlet temperature for cooling °C 7

Heat pump power supply V/Ph/Hz 230/1~/50 400/3~/50

Electrical heating element power supply (Smart Serv)

Control board power supply V/Ph/Hz 230/1~/50

V/Ph/Hz 400/3~/50

REMKO LWM series

Series LWM 80 LWM 110 LWM 150

Heater for anti-freeze protection power supply (optional)

V/Ph/Hz 230/1~/50

Max. current consumption per phase A 5.8 4.7 6.6

Rated current consumption for A7/W35 A 5.30 2.57 3.27

Rated power consumption for A7/W35 kW 1.22 1.60 2.04

Rated power consumption for A2/W35 kW 1.06 1.57 2.03

Max. power consumption kW 1.3 3.2 4.5

Power factor at A7/W35 (cosφ) -- 0.9

Customer-provided electrical protection

Refrigerant

A slow-

acting

16 3 x 20

R454B

Refrigerant, basic capacity kg 1.3 1.4 1.6

Medium flow rate water(according to EN 1451

1, at ∆t 5 K)

m3/h

1.1 1.4 1.6

Pressure loss (heating system), outdoor kPa 80 70 60

Max. airflow volume

m3/h

3000 3500 4000

Max. operating pressure, water bar 3

Hydraulic connection, inlet/return flow (flat-sealing)

Recommended diameter for copper piping to be used by the customer

Inches (DN) 1 1/4 (32)

mm 28

Max. sound power level in acc. with

dB(A) 54 56 58

DIN EN 12102:2008-09 and ISO 9614-2

Sound pressure level, LpA

dB(A) 32 34 36

Tonality dB(A) 0

Sound power level/sound pressure level

night operations/lowering mode

dB(A) 47/25 49/27 51/29

Dimensions (height/width/depth) mm 1600 x 1000 x 850

Enclosure class -- IP X4

Weight kg 200 220

COP = coef

ficient of performance in accordance with EN 14511, VDE tested, rated compressor frequency

60 Hz

EER = energy efficiency ratio in accordance with EN 14511, rated compressor frequency 60 Hz

Contains greenhouse gas according to Kyoto protocol, GWP 466

Distance 5 m, VDE tested, A7/W55, with half-spherical propagation

Information provided without guarantee! We reserve the right to make technical changes within the framework of technical advancement.

Series LWM 110 Duo LWM 150 Duo

Function Heating or Cooling

System Air/water

Heat pump manager Smart Control Touch

Drinking water tank enamelled optional

Auxiliary heater/rated output per heat pump kW 7.5

Domestic hot-water heating (changeover valve) optional

Connection oil/gas boiler optional

Heating capacity min./max. kW 2.0-21.4 3.0-29.0

Heating capacity/COP

with A12/W35 kW/COP 18.36/5.57 22.00/5.58

with A7/W35 kW/COP 16.08/5.02 20.56/5.03

with A2/W35 kW/COP 12.70/4.04 16.66/4.11

with A-7/W35 kW/COP 11.14/3.42 15.70/3.57

with A-15/W35 kW/COP 8.94/2.82 13.00/2.97

with A7/W45 kW/COP 15.74/3.88 20.18/3.89

with A-7/W45 kW/COP 11.02/2.83 15.52/2.98

with A7/W55 kW/COP 15.00/3.12 19.44/3.13

with A-7/W55 kW/COP 10.84/2.36 15.34/2.51

with A10/W35 kW/COP 17.10/5.31 21.20/5.32

Cooling capacity min./max. kW 3.3-23.8 5.5-28.0

Cooling capacity/EER

with A35/W7 kW/EER 15.26/2.65 24.40/2.65

with A35/W18 kW/EER 16.48/3.71 25.54/3.81

with A27/W18 kW/EER 21.42/4.00 36.08/4.11

Usable limits, heating °C -23 to +37

Service limits, cooling °C +15 to +45

Inlet temperature, heating water, max. °C 65

Min. inlet temperature for cooling °C 7

Power supply per heat pump V/Ph/Hz 400/3~/50

Power supply per electrical heating element

V/Ph/Hz 400/3~/50

(Smart Serv)

Power supply per control board V/Ph/Hz 230/1~/50

Power supply per heater for anti-freeze protection (optional)

V/Ph/Hz 230/1~/50

Max. current consumption per phase and heat pump A 4.7 6.6

Rated current consumption for A7/W35 per heat pump A 2.57 3.27

REMKO LWM series

Series LWM 110 Duo LWM 150 Duo

Rated power consumption for A7/W35 kW 1.60 2.04

Rated power consumption for A2/W35 per heat pump kW 1.57 2.03

Max. power consumption per heat pump kW 3.2 4.5

Power factor at A7/W35 (cosφ) per heat pump -- 0.9

Fuse protection provided by the customer per heat pump

Refrigerant

Max. refrigerant basic filling quantity per heat pump kg 1.4 1.6

Medium flow rate water(according to EN 14511, at ∆t 5 K) per heat pump

Outdoor pressure loss (heating system) per heat pump kPa 70 60

Max. airflow volume per heat pump

Max. water operating pressure per heat pump bar 3

Hydraulic connection inlet/return flow, flat-sealing per heat pump

Copper collector line diameter to be used by the customer per heat pump

Max. sound power level in acc. with

DIN EN 12102:2008-09 and ISO 9614-2

Sound pressure level LpA 4)per heat pump

Tonality dB(A) 0

Sound power level/sound pressure levelnight operations/lowering mode

per heat pump

A slow-

acting

m3/h

Inches (DN) 1 1/4 (32)

mm 42

dB(A) 56 58

dB(A) 34 36

dB(A) 49/27 51/29

1.4 1.6

2x3500 2x4000

3 x 20

R454B

Dimensions per heat pump (height/width/depth) mm 1600 x 1000 x 850

Enclosure class -- IP X4

Weight per heat pump kg 200 220

COP = coef

60 Hz

EER = energy efficiency ratio in accordance with EN 14511, rated compressor frequency 60 Hz

Contains greenhouse gas according to Kyoto protocol, GWP 466

Distance 5 m, VDE tested, A7/W55, with half-spherical propagation

Information provided without guarantee! We reserve the right to make technical changes within the framework of technical advancement.

ficient of performance in accordance with EN 14511, VDE tested, rated compressor frequency

2.2 Product data

Average condition

Series LWM 80 LWM 110 LWM 150

Energy efficiency ratio, heating 35°C/55°C A++/A++

Nominal heating power P rated kW 5 7 10

Room heating energy efficiency hs 35°C/55°C

% 161/136 161/142 164/138

Contribution to the seasonal room heating

% 4

energy ef

Yearly energy consumption QHE 35°C/ 55°C

Sound power level L

Warmer condition

ficiency of the REMKO Smart-Control

2629/3173 3395/3797 4588/5780

dB(A) 56 58 60

Series LWM 80 LWM 110 LWM 150

Energy efficiency ratio, heating 35°C/55°C A++/A++

Nominal heating power P rated kW 4 6 8

Room heating energy efficiency hs 35°C/55°C

Yearly energy consumption QHE 35°C/ 55°C

% 182/160 187/167 169/164

1326/1379 1668/1638 2550/2537

Colder condition

Series LWM 80 LWM 110 LWM 150

Energy efficiency ratio, heating 35°C/55°C A++/A++

Nominal heating power P rated kW 7 9 13

Room heating energy efficiency hs 35°C/55°C

Yearly energy consumption QHE 35°C/ 55°C

verage condition = Moderate temperature periods

Warmer condition = Warm temperature periods

Colder condition = Cold temperature periods

The specified value is based on results from standard testing.

% 147/114 145/122 148/120

4158/6135 5485/7278 7319/10700

The actual consumption depends on the use and location of the unit

REMKO LWM series

Average condition

Series LWM 110 Duo LWM 150 Duo

Energy efficiency ratio, heating 35°C/55°C A++/A++

Nominal heating power P rated kW 14 20

Room heating energy efficiency hs 35°C/55°C

% 161/142 164/138

Contribution to the seasonal room heating

% 4

energy ef

Yearly energy consumption QHE 35°C/ 55°C

Sound power level L

Warmer condition

ficiency of the REMKO Smart-Control

per heat pump

6790/7594 9176/11560

dB(A) 58 60

Series LWM 110 Duo LWM 150 Duo

Energy efficiency ratio, heating 35°C/55°C A++/A++

Nominal heating power P rated kW 12 16

Room heating energy efficiency hs 35°C/55°C

Yearly energy consumption QHE 35°C/ 55°C

% 187/167 169/164

3336/3276 5100/5074

Colder condition

Series LWM 110 Duo LWM 150 Duo

Energy efficiency ratio, heating 35°C/55°C A++/A++

Nominal heating power P rated kW 18 26

Room heating energy efficiency hs 35°C/55°C

Yearly energy consumption QHE 35°C/ 55°C

verage condition = Moderate temperature periods

Warmer condition = Warm temperature periods

Colder condition = Cold temperature periods

The specified value is based on results from standard testing.

% 145/122 148/120

10970/14556 14638/21400

The actual consumption depends on the use and location of the unit

2.3 Unit dimensions of indoor units

40+20

840 934

1600

845

985

180

110 140

180

130

734

700

Unit dimensions

Fig. 1: Unit dimensions (all dimensions in mm)

A: Front view B: Bird´s eye view

C: Side view

845

985

180

110 140

180

130

111

181

221

199

153

106

166

113

262

377

REMKO LWM series

Designations of the pipe connections

Fig. 2: Designations of the pipe connections

A: Rear view B: Bird´s eye view 1: Condensate drain 2: Inlet heat pump 1 1/4"

3: Return flow heat pump 1 1/4" 4: Cable inlets a: Air inlet b: Air outlet

2.4 Diagram, cooling cycle

18 19

EEV

Fig. 3: Diagram, cooling cycle

1: Refrigerant dryer 2: Refrigerant inspection glass 3: Electr. expansion valve 4: Finned heat exchanger air suction probe 5: Finned heat exchanger fan 6: Finned heat exchanger air outlet probe 7: Refrigerant probe suction-side 8: Low pressure switch 9: Compressor 10: Refrigerant collector

11: Hot gas probe/Suction gas probe 12: High pressure switch 45 bar 13: 4-way changeover valve 14: Safety valve 15: Water outlet probe/Heat pump inlet 16: Smart Serv 7.5 kW 17: Manual bleeder valve 18: Water outlet probe/Heat pump return flow 19: Cap valve 20: Circulation pump

-23°C; 45°C

-7°C; 65°C

37°C; 60°C

37°C; 35°C

-23°C; 24°C

-30 -20 -10 0 10 20 30 40

REMKO LWM series

2.5 Heat pump usable limits in monovalent operation

Fig. 4: Usable limits LWM

A: Outside temperature [°C] B: Heating water inlet temperature [°C]

Outside temperature [°C] -23 -23 -7 37 37

Inlet temperature [°C] 24 45 65 60 35

2.6 Pump characteristics and circulation pump pressure losses

Fig. 5: Capacity range of the UPMXL 25-125

p: Power consumption [kPa] H: Delivery height [m]

External control via analogue-In PWM signal. The tolerances of each curve are in acc. with EN 1151-1:2006

Requirement [l/s or m3/h ]

Stage Effective power consumption [W] Current consumption [A] Motor protection

min. 7 0.07 blocking current

resistant

max. 136 1.03 blocking current

resistant

Technical data

Pump type Grundfos UPMXL 25-125

Installation length mm 180

Connecting threads Inche

R 1 / G 1 1/2

Internally controlled via PP/CP/CC -

Control signal

Digital bidirectional low voltage PWM signal

Power supply voltage+ 10/- 15 % 50 Hz V 1 x 230 V

The heating system must be dimensioned in such a way that at least the nominal heating water flow rate can be achieved with the residual head of the circulation pump.

Residual head LWM

Series LWM 80 LWM 110 LWM 150

Nomin. 1) heating water throughput per heat pump m3/h

Residual head 2) per heat pump

3-way changeover valve pressure loss

kPa 80 70 60

kPa 7 8 10

1.1 1.4 1.6

Spread K 5 5 5

Nominal volume flow rates according to DIN EN 1451

1, for efficient and safe operation do not fall below the

nominal value.

Residual head with pumps according to accessories (without pressure loss of the 3-way changeover valve)

REMKO changeover valve DN 25

The pipe dimensions from the heat pump to the on-site hydraulic connection must be designed according to the design medium flow rate.

The minimum diameter is DN 25.

Duo collector

Heat pump pipe length to on-site hydraulic system 1-13 m 13-20 m

Smooth pipe with inside diameter DN 25 DN 32

The copper pipe of the Duo variant collector line must have an inside diameter of at least 42 mm.

line

DN 40

In the case of metal composite pipes, the higher individual resistances of the fittings mean that a design with residual head must be carried out.

0,0

10,0

20,0

30,0

40,0

50,0

60,0

100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000

REMKO LWM series

2.7 Total sound power level

LWM 80

Fig. 6:

otal sound power level L

A: Sound power level LwAre 1pW [dB(A)] B: Frequency [Hz]

2: Night mode 60% A7/W55 3: A total [dB(A)]

1: Nominal/max. A7/W55

Middle frequency [Hz] 100 125 160 200 250 315 400 500 630 800 1000

Nominal/max. A7/W55 [dBA]

Night mode 60% A7/W55 [dBA]

30.6 39.6 40.6 42.4 41.3 38.9 39.2 39.2 40.4 45.5 45.4

30.9 29.8 33.8 34.1 31.5 31.9 31.6 31.4 31.2 36.2 42.7

Middle frequency [Hz] 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 A total

Nominal/max. A7/W55 [dBA]

Night mode 60% A7/W55 [dBA]

The sound power conforms to accuracy class 2.

The standard deviation of the aforementioned A-valued sound power levels amounts to 1.5 dB.

42.4 41.1 39.6 40.7 38.9 37.9 38.8 41.0 34.1 32.0 53.9

30.6 33.4 31.6 31.9 32.1 30.2 31.8 33.4 28.0 26.3 47.1

LWM 110/LWM 110 Duo

0,0

10,0

20,0

30,0

40,0

50,0

60,0

100 125 160 200 250 315 400 500 630 800 10 00 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000

Fig. 7:

otal sound power level L

A: Sound power level LwAre 1pW [dB(A)] B: Frequency [Hz]

2: Night mode 60% A7/W55 3: A total [dB(A)]

1: Nominal/max. A7/W55

Middle frequency [Hz] 100 125 160 200 250 315 400 500 630 800 1000

Nominal/max. A7/W55 [dBA]

Night mode 60% A7/W55 [dBA]

32.6 41.6 42.6 44.4 43.3 40.9 41.2 41.2 42.4 47.5 47.4

32.9 31.8 35.8 36.1 33.5 33.9 33.6 33.4 33.2 38.2 44.7

Middle frequency [Hz] 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 A total

Nominal/max. A7/W55 [dBA]

Night mode 60% A7/W55 [dBA]

44.4 43.1 41.5 42.7 40.9 39.6 40.8 43.0 36.1 34.0 55.9

32.6 35.4 33.6 33.9 34.1 32.2 33.8 35.4 30.0 28.3 49.1

The sound power conforms to accuracy class 2.

The standard deviation of the aforementioned A-valued sound power levels amounts to 1.5 dB.

0,0

10,0

20,0

30,0

40,0

50,0

60,0

70,0

100 125 160 200 250 31 5 40 0 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 80 00 10000

REMKO LWM series

LWM 150/LWM 150 Duo

Fig. 8:

otal sound power level L

A: Sound power level LwAre 1pW [dB(A)] B: Frequency [Hz]

2: Night mode 60% A7/W55 3: A total [dB(A)]

1: Nominal/max. A7/W55

Middle frequency [Hz] 100 125 160 200 250 315 400 500 630 800 1000

Nominal/max. A7/W55 [dBA]

Night mode 60% A7/W55 [dBA]

34.6 43.6 44.6 46.4 45.2 42.9 43.2 43.2 44.4 49.5 49.4

34.9 33.8 37.8 38.1 35.3 35.9 35.6 35.4 35.2 36.2 46.7

Middle frequency [Hz] 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 A total

Nominal/max. A7/W55 [dBA]

Night mode 60% A7/W55 [dBA]

46.4 45.1 43.5 44.7 42.9 41.6 42.8 45.0 38.1 36.0 57.9

34.6 37.4 35.6 35.9 36.1 34.2 35.8 37.4 32.0 30.8 51.1

The sound power conforms to accuracy class 2.

The standard deviation of the aforementioned A-valued sound power levels amounts to 1.5 dB.

2.8 Characteristic curves

60 Hz

n-max

60 Hz

n-max

Heating capacity LWM 80 at inlet temperature of 35°C

Fig. 9: Heating capacity at inlet temperature of 35 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

Heating capacity LWM 80 at inlet temperature of 45 °C

C: Rated frequency [Hz]

Fig. 10: Heating capacity at inlet temperature of 45 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

C: Rated frequency [Hz]

60 Hz

n-max

35° C

45° C

55° C

REMKO LWM series

Heating capacity LWM 80 at inlet temperature of 55 °C

Fig. 11: Heating capacity at inlet temperature of 55 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

COP LWM 80 at inlet temperature 35 °C, 45 °C and 55 °C

C: Rated frequency [Hz]

Fig. 12: COP at inlet temperature 35°C, 45°C and 55°C

A: Outside temperature [°C] D: COP [-]

E: Inlet temperature [°C]

Heating capacity LWM 110 at inlet temperature of 35 °C

60 Hz

n-max

60 Hz

Fig. 13: Heating capacity at inlet temperature of 35 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

Heating capacity LWM 110 at inlet temperature of 45 °C

C: Rated frequency [Hz]

Fig. 14: Heating capacity at inlet temperature of 45 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

C: Rated frequency [Hz]

n-max

60 Hz

35° C

45° C

55° C

REMKO LWM series

Heating capacity LWM 110 at inlet temperature of 55 °C

Fig. 15: Heating capacity at inlet temperature of 55 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

COP LWM 110 at inlet temperature 35 °C, 45 °C and 55 °C

C: Rated frequency [Hz]

Fig. 16: COP at inlet temperature 35°C, 45°C and 55°C

A: Outside temperature [°C] D: COP [-]

E: Inlet temperature [°C]

Heating capacity LWM 150 at inlet temperature of 35 °C

n-max

60 Hz

n-max

60 Hz

Fig. 17: Heating capacity at inlet temperature of 35 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

Heating capacity LWM 150 at inlet temperature of 45 °C

C: Rated frequency [Hz]

Fig. 18: Heating capacity at inlet temperature of 45 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

C: Rated frequency [Hz]

n-max

60 Hz

35° C

45° C

55° C

REMKO LWM series

Heating capacity LWM 150 at inlet temperature of 55 °C

Fig. 19: Heating capacity at inlet temperature of 55 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

COP LWM 150 at inlet temperature 35 °C, 45 °C and 55 °C

C: Rated frequency [Hz]

Fig. 20: COP at inlet temperature 35°C, 45°C and 55°C

A: Outside temperature [°C] D: COP [-]

E: Inlet temperature [°C]

Heating capacity LWM 110 Duo at inlet temperature of 35 °C

60 Hz

n-max

60 Hz

Fig. 21: Heating capacity at inlet temperature of 35 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

Heating capacity LWM 110 Duo at inlet temperature of 45 °C

C: Rated frequency [Hz]

Fig. 22: Heating capacity at inlet temperature of 45 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

C: Rated frequency [Hz]

n-max

60 Hz

35° C

45° C

55° C

REMKO LWM series

Heating capacity LWM 110 Duo at inlet temperature of 55 °C

Fig. 23: Heating capacity at inlet temperature of 55 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

COP LWM 110 Duo at inlet temperature 35 °C, 45 °C and 55 °C

C: Rated frequency [Hz]

Fig. 24: COP at inlet temperature 35°C, 45°C and 55°C

A: Outside temperature [°C] D: COP [-]

E: Inlet temperature [°C]

Heating capacity LWM 150 Duo at inlet temperature of 35 °C

n-max

60 Hz

n-max

60 Hz

Fig. 25: Heating capacity at inlet temperature of 35 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

Heating capacity LWM 150 Duo at inlet temperature of 45 °C

C: Rated frequency [Hz]

Fig. 26: Heating capacity at inlet temperature of 45 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

C: Rated frequency [Hz]

n-max

60 Hz

35° C

45° C

55° C

REMKO LWM series

Heating capacity LWM 150 Duo at inlet temperature of 55 °C

Fig. 27: Heating capacity at inlet temperature of 55 °C

A: Outside temperature [°C] B: Heating capacity/total thermal load [kW]

COP LWM 150 Duo at inlet temperature 35 °C, 45 °C and 55 °C

C: Rated frequency [Hz]

Fig. 28: COP at inlet temperature 35°C, 45°C and 55°C

A: Outside temperature [°C] D: COP [-]

E: Inlet temperature [°C]

3 Unit description

Description

The LWM series is a monobloc heat pump in which refrigeration components are installed in a hermetically sealed refrigeration circuit. In addition, a highly ef and an electric volume flow monitor are integrated.

Furthermore, an optional electric Smart-Serv auxiliary heater can be installed to realise monoenergetic operation. The Smart-Serv can also be used for screed drying, hygiene functions or emergency heat-operation.

If the on-site pressure loss does not exceed the maximum available, a heating buffer tank can be dispensed with. If necessary, only a drinking water storage tank and changeover valve should then be installed.

A district heating pipe is recommended as the water-bearing pipe from the heat pump into the house. This can be supplied as an option. The Smart-Control Touch controller is supplied in an attractively designed housing for wall mounting or as a built-in controller in an indoor unit with a storage tank. The touch display can optionally be installed in a double flush-mounted or double surface-mounted box. With the Smart-Control Touch, three heating cycles can be activated, two of which act as a mixing cycle. Further functions such as solar thermal, second heat generator as bivalent system, cooling, external heating cycle pumps can be controlled as standard. A combination with a PV system to increase its own power requirement is integrated as standard.

ficient speed-controlled circulation pump

Function of the heat pump

A heat pump is a unit which makes use of a working medium to absorb ambient heat under low temperatures and transports this heat to a place where it can be of use for heating purposes. Heat pumps work according to the same principles as a refrigerator. The difference is that heat, the “byproduct” of the refrigerator, is the goal of the heat pump.

The main components of the cooling circuit consist of an evaporator, a compressor, a condenser and an expansion valve. In a finned evaporator, the refrigerant evaporates both because of lower pressure and because of lower heat-source temperatures through absorption of energy from the environment. In the compressor, the refrigerant is brought to a higher pressure and temperature by the application of electrical energy. Next, the hot refrigerant gas reaches the condenser, a plate heat exchanger. Here the heat gas condenses, transferring heat to the heating system. The liquefied refrigerant then expands and cools in a flow regulator, the expansion valve. Then the refrigerant flows into the evaporator once more and the cycle is complete.

Smart-Control Touch is used for regulation, and it assures the independent operation of all safety devices. The water circulation system consists of a circulation pump, plate heat exchangers, dirt traps, safety valve, a manometer, filling and drain valves, a flow switch and a service water storage tank.

A 3-way changeover valve, overflow protection valve, additional probes and storage systems are available as accessories.

Fig. 29: Functional diagram heating

1: Condensing 2: Liquefying

3: Decompression 4: Evaporation

REMKO LWM series

Layout

A precise calculation of the building’s heating load according to EN 12831 is required for the design and dimensioning of a heating system. However approximate requirements can be determined based on the year of construction and the type of

building. This table approximate specific heating load for a few types of building. The required heating system output can be calculated by multiplying the area to be heated with the given values.

For a precise calculation, various factors must be considered. The transmission-heat requirement, the infiltration heat-loss and an allowance for water heating comprise the total heating capacity which the heating system must provide.

The total area of the floor surfaces, exterior wall windows, doors and roofing is required in order to determine the transmission heat requirement. In addition, information about the materials used in the building is required, as well as about the different thermal transmission coefficients (known as the K value). Also required are the room temperature and the standard outside temperature, that is, the lowest outside temperature on average that will occur during the year. The equation for determining the thermal transmission requirement is Q=A x U x (tR-tA) and must be calculated for all

enclosed room floor areas.

The infiltration heat requirement takes into consideration how often the heated room air is exchanged for cold external air. The room volume “V”, the air exchange frequency “n” and the specific heat capacity “c” of the air is also required in addition to the room temperature and average low temperature. The equation is: Q = V x n x c (tR-tA)

An approximate addition for the preparation of domestic water per person amounts in acc. with VDI 2067: 0.2 kW.

on page 32 provides an

Design example

By way of a design example, a residential home with a living area of 150 m2 and a heating requirement of approx. 40 W/m2 was selected. A total of five persons live in the house. The heat load amount to 6.0 kW ance of 0.2 kW results in a required heating capacity of 7.0 kW. Depending on the power company, an additional charge must then be made in order to factor in any service time-out periods that may apply. The rating and determination of the heat pump’s balance-point temperature derives graphically from the heat pump’s inlet temperature specific heat-output diagram (in this example 35 °C for underfloor heating). Next, the heat load for the standard outdoor temperature (the lowest temperature of the year locally) and the heat threshold are marked on the graph. The outside-temperaturedependent heating requirement, (Fig. 30) simplified here as a straight-line relationship between heatload and the start of the heating season, is recorded in the graph of heat-load curves. The intersection of the two straight lines with the rated heat-load curve is plotted on the X axis, where the balance-point temperature is read (in this example approx. -3 °C). The minimum performance of the 2nd heat source is the difference between heat load and the heat pump’s maximum heating capacity on these days (in this example, the required power required to cover peak load requirements is approx. 3 kW).

. Adding a drinking water allow-

Building type

Passive energy house 10

Low-energy house built in 2002 40

According to energy conservation order regarding heat insulation 1995

Modern building constructed around 1984 80

Partially renovated old building constructed pre-1977 100

Non-renovated old building constructed pre-1977 200

Specific heating capacity in W/m

14.0

Outside temperature [°C]

Heating capacity/totalheat requirement [kW]

Bivalence point - 3 °C

Standard outside temperature

Heating load in accordance with DIN EN 12831

Rated frequency

n-max

Total thermal load

Bivalence point determination at inlet temperature 35 °C

Fig. 30: Heating performance diagram of the heat pump LWM

Monobloc heat pump

The REMKO inverter heat pump is connected to the house via water-carrying pipes. The water-carrying pipes must be laid to be frost proof. If this is not possible from a structural point of view

, other frost protection measures must be implemented, e.g. glycol, trace heating, etc.

REMKO inverter technology

The heat pump's compressor is equipped with are equipped with a speed control system, as needed. The power control on conventional heat pumps provides only two states, either “ON” (full output) or “OFF” (no output). The heat pump turns on below a specified temperature and turns off when this temperature is reached. Heat regulation in the REMKO monobloc heat pump is modulated to the actual need and is adjusted to suit actual needs. The electronics system has an integrated frequency-converter which serves to modify the compressor speed and the speed of the fan as required. The compressor works at a higher speed when under full load than under partial load. The lower speeds ensure a longer operational lifetime for the components, improved coefficient of performance and lower noise. Lower speeds also result in lower energy consumption (electricity) and longer service life. I.e.: Monobloc heat-pumps will run practically throughout the heating season. In all, the highest efficiency possible.

1/3

When it is switched on, the inverter only requires one-third of the time of conventional systems

Time

Minimal temperature fluctuations mean energy savings

Conventional Inverter

Temperature

10 12 14 16 18 20 22 24 26 28 30

uncomfortably humid

comfortable

still comfortable

uncomfortably dry

Relative humidity in %

Room air temperature in °C

REMKO LWM series

Fig. 31: Modern inverter technology

Cooling mode

Because of circuit reversal, cooling is also possible. In cooling mode, the components of the refrigeration circuit are used to produce cold water with which heat can be extracted from a building. This can be accomplished with dynamic cooling or passive cooling.

With dynamic cooling the refrigerating capacity is actively transferred to the indoor air. This is achieved by means of water-based fan convectors. In doing so, it is desirable that the inlet temperatures are under the dew point, in order to transfer a higher refrigerating capacity and to dehumidify the indoor air.

Passive cooling refers to the absorption of heat via cooled floors, walls or ceiling surfaces. In doing so, water-carrying pipes make the structural sections into thermally effective heat exchangers. In order to achieve this, the refrigerant temperature has to lie above the dew point, in order to avoid the formation of condensation. Dew-point monitoring is required for this purpose.

We recommend dynamic cooling with fan convectors, in order to achieve increased cooling capacity and in order to dehumidify the air on muggy summer days. You will find corresponding devices in the KWD, KWK and WLT-S series on our website: “www.remko.de”. The advantage here is that dew point monitoring is not required.

The comfort zone in the illustration below shows which values for temperature and humidity are considered comfortable for people. This range should ideally be met when heating or air-conditioning buildings.

Fig. 32: Comfort zone

4 Assembly

21 3

Außenfühler

21 3 54

A1 A2

4.1 System layout

System layout for heat pump assembly LWM 300 IM Stuttgart

A: Outdoor unit B: Indoor unit with storage tank C: External probe

System layout for heat pump assembly LWM Duo Mannheim

1: Unmixed cycle 2: Cold water 3: Hot water

A1/A2: Heat pump 1 and 2 B1: Hot water storage tank B2: Buffer tank C: External probe D: Boiler/wall heating unit (optional) E: Smart Control Touch

1: Hot water 2: Cold water 3: Unmixed cycle 4: Mixed cycle 5: Mixed cycle 6: Collector line (min. DN 40)

REMKO LWM series

4.2 General installation notes

DANGER!

All electrical installation work must be done by an electrician.

WARNING!

All electric lines are in accordance VDE regulations to dimension and to lay

DANGER!

The connection of refrigerant pipes and the handling of refrigerant may be only be carried out by qualified personnel (competence category I).

n These instructions are to be observed when

installing the heat pump.

n The unit should be delivered as near as pos-

sible to the site of installation in its original packaging in order to avoid transport damage.

n The unit is to be checked for visible signs of

transport damage. Possible faults are to be reported immediately to the contractual partner and the haulage company

n Suitable sites for installation are to be selected

with regard to machinery noise and the set-up process.

n It is recommended to place the heat pump as

close as possible to the building to be heated, observing the minimum distances.

n Establish all electrical wiring in accordance

with the relevant DIN and VDE standards.

n The electrical power cables must always be

fastened to the electrical terminals in the proper manner. Otherwise there is a risk of damage.

n Ensure that no water-carrying pipes pass

through living or sleeping areas.

Wall opening

n A wall opening of approx. 200 mm diameter

and 10 mm incline from the inside to the outside must be created.

o prevent damage, the interior of the wall

n T

opening should be padded or, for example, lined with PVC pipe (see figure).

n After installation has been completed, use a

suitable sealing compound to close off the wall opening provided by the customer, taking account of fire protection regulations and local conditions.

n District heating pipelines are recommended

(see accessories).

Fig. 33: Wall opening

1: Inlet/return flow, heat pump 2: Power supply, heat pump 3: Smart-Control control cable (shielded)

4.3 Set-up and assembly

20 cm

of the heat pump

Set-up site

n The unit may be attached only to a load-

bearing structure or wall. Ensure that the unit is installed only vertically should be well ventilated.

n To minimise noise, install floor consoles with

vibration dampers and a considerable distance from acoustically-reflective walls to minimise noise.

n The minimum clearances specified on the next

page should be maintained when carrying out the installation. These minimum distances serve to ensure unrestricted air inlet and outlet. The air that has discharged may not be drawn in again. Take the performance data of the units into account. Additionally, there must be adequate space available for installation, maintenance and repair.

n If the unit is erected in an area of strong winds,

then it must be protected against them and additional stabilisation is recommended. This can be realised for example with wire ropes or other constructions (Fig. 34). The snow line is to be observed during installation (Fig. 35).

n REMKO recommends always placing the unit

on vibration dampers. Vibration dampers prevent the transmission of vibrations through the floor or walls.

n If there is insufficient space under the device

for the lines, then the pre-cut recesses can be removed from the rear enclosure-panel and the pipes guided through these openings.

n During installation, add about 20 cm to the

expected snow depth to guarantee unimpeded intake and exhaust of outdoor air year round (Fig. 35).

n The installation site of the outdoor unit should

be agreed together with the operator primarily so that ’non-concerning levels of operating noise’ are achieved, rather than in respect of ’short distances’.

. The installation site

NOTICE!

The site for the unit must be selected so that machinery noise that occurs disturbs neither the residents nor the facility operator TA-noise specifications as well as the table containing the drawings relating to sound pressure levels!

The quick calculator of the "Bundesverbandes Wärmepumpe e.V." (German Federal Association of Heat Pumps) can be used for theoretical calculations (www.waermepumpe.de/schallrechner/).

Fig. 35: Protection against snow

1: Snow

. Observe the

Fig. 34: Protection against wind

1: Wind

REMKO LWM series

Assessment level in accordance

with T

Point of emissions

Daytime in

dB(A)

Industrial areas 70 70

Commercial areas 65 50

Core areas, village areas and mixed zones 60 45

General residential areas and small housing estates 55 40

Exclusively residential areas 50 35

Spa areas, hospitals and mental institutions 45 35

Isolated noise peaks of short duration may not exceed 30 dB(A) during the day and 20 dB(A) at night.

A noise

Night-time in

dB(A)

Definition of the Danger Area

WARNING!

Access to the unit is only permitted for authorised and trained persons. If unauthorised persons can approach the danger areas, these areas must be identified with corresponding signs, barriers, etc.

n The external danger area surrounds the unit up

to a distance of 2 m, measured in all directions from the unit housing.

n The external danger area on-site can dif

a result of the setup. The specialist company performing the installation work bears the responsibility for this.

n The internal danger area is located inside the

machine and can only be reached with the use of an appropriate tool. Access is prohibited for unauthorised persons!

fer as

>= 250

>= 2000

>= 250

>= 1000

>= 900

>= 250

>= 600 >= 600 >= 600 >= 600

>= 250

>= 2000

>= 2000 >= 3000>= 600 >= 250

Minimum distances during construction of a heat pump

Minimum distances during construction of multiple heat pumps

Fig. 36: Minimum distances during construction of a heat pump in mm

1: Next to a wall, air outlet open to the front, flow

restriction behind

2: Next to a wall, air outlet toward the wall, flow

restriction to the front

3: In a niche, air outlet open to the front, flow

restriction behind and on both sides

4: Next to a covered wall, air outlet open to the

front, flow restrictions behind and above

Fig. 37: Minimum distances during construction of multiple heat pumps in mm

1: Next to a wall, air outlet toward the wall, flow

restriction to the front

2: In a niche, air outlet open to the front, flow

restriction behind and on both sides

3: Between two walls, air outlet toward the wall

and in the direction of other devices, open sides: flow restriction front and rear

9 1010

8 8

REMKO LWM series

Condensate drainage connection and safe drainage - strip foundation

Fig. 38: Condensate drainage, seepage of condensate and strip foundation (cross-section)

1: Heat pump (air outlet) 2: Vibration dampers 3: Floor bracket (accessory) 4: Reinforced strip foundation, frost free 5: Gravel layer for seepage 6: Protective tube for lines and

electrical connecting line

(temperature resistant up to at least 80 °C) 7: Drainage channel 8: Frost line 9: Drainage pipe 10: Soil

NOTICE!

When installing an L minimum distances must be observed and an air short circuit must be prevented.

WM-Duo heat pump, the

Fig. 39: Dimensions for the strip foundation (bird's eye view)

1: Heat pump 4: Reinforced strip foundation, frost free 5: Gravel layer for seepage 9: Drainage pipe

dimensioning the strip foundation (all dimensions in mm)

Dime nsion LWM 80 LWM 110 LWM 150

A 1000 1000 1000

B 200 200 200

C 840 840 840

D 700 700 700

E 600 600 600

NOTICE!

Anti-freeze protection

In the case of heat pump systems, in which frost-free conditions are not assured, a drainage facility should be provided. If control and heating circulation pump are ready for operation, the anti-freeze protection function of the controller works. The system must be emptied when the heat pump is shut down or there is a power failure. For heat pump systems in which a power failure cannot be detected (e.g. holiday home), the heating circuit must be operated with a suitable anti-freeze protection.

Condensate drainage connection

If the temperature falls below the dewpoint on the finned evaporator heating operation.

The condensate water must be drained off frostfree via a condensation pipe with a diameter of at least 50 mm.

n The condensate drainage line must be pro-

vided by the customer and have an incline of at least 2 %. If necessary proof insulation.

n When operating the unit at outside tempera-

tures below 4 °C, ensure the condensate drainage line is laid to protect it against frost. If necessary, the lower part of the housing and condensate tray is to be kept frost free in order to ensure permanent draining of the condensate. If necessary, fit a pipe heater.

n If the substrate is permeable to water, it is suffi-

cient to lead the pipe vertically at least 90 cm deep into the ground.

n In the case of condensate drainage in drains or

into the sewer system, the installation must be frost-free and with an incline.

n The condensate may only be discharged into

the sewer system via a funnel siphon, which must be accessible at all times.

Regional laws must be observed.

n Following installation, check that the conden-

sate run off is unobstructed and ensure that the line is durably leak tight.

, condensation occurs during the

, fit vapour-diffusion-

Heater for anti-freeze protection

The heater for anti-freeze protection is used to control the temperature of the interior space of the hydraulic unit. This ensures that in the event of a fault, the last step in the freezing of the medium and thus defects due to frost can be prevented. A temperature of >+3 °C is established through recirculated air operation. It is essential that a separate UPS is used for the power supply

Safe drainage in the event of leakages

NOTICE!

Local regulations or environmental laws, for example the German W (WHG), can require suitable precautions to protect against uncontrolled draining in case of leakage to provide for safe disposal of escaping refrigerator oil or hazardous media.

NOTICE!

With the connection of an external drain line to the oil separator

, it must be kept frost-free.

ater Resource Law

Pipe heater

A pipe heater can be mounted on water-carrying pipes to ensure frost protection in the pipes.

Install a pipe heater if there is a risk of frost.

When installing on the mounting bracket or on a foundation, we recommend the installation of a pipe heater if the condensate drain or the inlet/ return flow heat pipes cannot be laid in a frost-free manner or if they are heavily exposed to weather conditions.

The pipe heater must be connected to a separate power supply (UPS).

REMKO LWM series

5 Hydraulic connection

A separate interpretation of nominal flow rate must be made for every system (see technical data).

n W

e recommend installing a buffer tank as a hydraulic compensator for hydraulic isolation of the heating cycle. Hydraulic isolation is required when:

- different inlet temperatures need to be achieved, e.g. underfloor heating/radiators

- the pressure drop in the heating distribution system is greater than stated in the technical data

- the use of other heat generators, e.g. combustible burner for solid fuel, solar or bivalent (dual-fuel) systems.

n Perform a pipe-network calculation before

installing the heat pump. After installing the heat pump, it is necessary to perform a hydraulic balancing of the heating circuit.

n Protect underfloor heating systems against

excessively high inlet temperatures.

n Do not reduce pipe diameters for the inlet and

return flow connections to the heat pump before connecting a buffer tank.

n Plan for air bleed valves and drain-off taps at

appropriate places.

n Flush the system’s entire pipe network before

connecting the heat pump.

n One or, where necessary, several expansion

vessels must be designed for the entire hydraulic system.

n The system pressure of the entire pipe network

is to be matched to the hydraulic system and must be checked when the heat pump is turned off. Also update the static-pressure form supplied with the heat pump.

n As delivered, the safety assembly consists of a

pressure gauge, a bleeding valve and a safety valve. This must be installed by the customer in the hydraulic system.

n During installation, the minimum cross-sections

of the collector line must be 42 mm or larger.

Fig. 40: Safety assembly

1: Pressure gauge 2: Automatic bleeding valve 3: Safety valve

n All exposed metallic surfaces must be addition-

ally insulated.

n Cooling mode via the heating circuit requires a

complete vapour density insulation along the entire length of the pipework.

n All outgoing heating cycles, including the con-

nections for water heating, are to be secured against the ingress of circulating water by means of check valves.

n Before being placed in service, the system

must be thoroughly flushed. Conduct a seal test and perform a thorough bleeding of the entire system - repeatedly with DIN standards.

Actual schemas for hydraulic integration can be found on the internet at www

, if necessary, in acc.

.remko.de

21 3

Hydraulic diagram for heat pump assembly LWM Stuttgart

Functions: Heating/cooling and hot water, operating mode: monoenergetic

This hydraulic cycle diagram serves solely to assist in planning activities; the customer-provided hydraulic system on site must be planned and installed by the installation contractor!

Fig. 41: Example hydraulic diagram

A: Heat pump B: Indoor unit LWM 300 IM C: External probe

LWM compact heat pump models are ideal for use in new construction, where the heat pump is the sole heat generator Smart Control.

The indoor unit consists of an enamelled 300 l drinking water storage tank of the EWS series. In addition, a 3-way changeover valve and an electric bypass valve are installed.

The Smart-Control installed in the indoor unit switches all electrical components. Due to the pre-installed components, considerable assembly time is saved.

The highly efficient primary pump in the outdoor unit [A] can be used as a heating cycle pump and its speed is regulated according to requirements. There is a pressure drop present on site (see technical data). If the pressure losses on site exceed this, a separate storage tank, e.g. REMKO KPS, must be used as a hydraulic compensator. Then a REMKO heating cycle group unmixed, type HGU, and two mixed heating cycle groups, type HGM, are available. Moreover, the hot water and cold water supply connections are all connected to the indoor unit on the top.

A circulation line can optionally be connected to the storage tank.

So that the heat pump can efficiently and smoothly supply the heating water system directly (without buffer tank), the following basic prerequisites must be fulfilled:

n The heating system must be able to be operated with an inlet temperature n The maximum pressure drop in the heating system must not be exceeded n A minimum water flow volume of 20 l/KW must be assured. If this is not possible, then a valve must be

n The pipe cross sections of the lines from the heat pump to the heating manifolds shall not be reduced n The min. water volume of 5 l/kW cooling capacity with active cooling must be observed

. In an emergency, an electr. auxiliary heater (mono-energetic variant) can be switched on by the

installed at a suitable location (last heating manifold)

1: Unmixed cycle 2: Cold water 3: Hot water

(e.g. only floor heating)

Außenfühler

21 3 54

A1 A2

REMKO LWM series

Hydraulic diagram for heat pump assembly LWM Duo Mannheim

Functions: Heating/cooling and hot water, operating mode: monoenergetic

This hydraulic cycle diagram serves solely to assist in planning activities; the customer-provided hydraulic system on site must be planned and installed by the installation contractor!

A1: Heat pump 1 A2: Heat pump 2 B1: Hot water storage tank B2: Buffer tank C: External probe D: Boiler/wall heating unit (optional) E: Smart Control Touch

The LWM compact heat pump models are ideal for use in new or in existing buildings, where the heat pump is the sole heat generator

The Smart-Control regulation switches all electrical components.

The highly efficient primary pump inside the heat pump is used as the circulation pump. The combination buffer tank consists of an enamelled 300 l hot water tank [B1] and a 100 l vapour diffusion-tight buffer tank [B2] which is integrated into the system. The buffer tank is the hydraulic compensator if the pressure losses of the heating system are too high (see “Technical data”).

n An air short circuit of the external units must be prevented n The pressure loss available on site from both heat pumps must not be exceeded. n The collector line of the heat pumps must be at least DN 40 n The hydraulic connection of the individual heat pumps must be at least DN 25 n The pipe cross sections of the lines from the heat pump to the connection to the storage tank shall not be

reduced

n The min. water volume with active cooling must be observed. n The hydraulic connection of the L

. An additional heat generator can be installed to cover peak loads.

WM-Duo variant must always be made via a suitable buffer tank

1: Hot water 2: Cold water 3: Unmixed cycle 4: Mixed cycle 5: Mixed cycle 6: Collector line (min. DN 50)

KWS 300

21 3 54

Hydraulic diagram for heat pump assembly LWM Mannheim

Functions: Heating/cooling and hot water, operating mode: monoenergetic

This hydraulic cycle diagram serves solely to assist in planning activities; the customer-provided hydraulic system on site must be planned and installed by the installation contractor!

Fig. 42: Example hydraulic diagram

A: Heat pump B1: Hot water storage tank B2: Buffer tank C: External probe D: Boiler/wall heating unit (optional) E: Smart Control Touch

The LWM compact heat pump models are ideal for use in new or in existing buildings, where the heat pump is the sole heat generator

The Smart-Control regulation switches all electrical components.

n The heating cycles connected must be hydraulically balanced. n The pressure drop between heat pump and storage tank must not be exceeded. n A minimum water flow volume of 20 l/KW must be assured. n The pipe cross sections of the lines from the heat pump to the storage tank may not be reduced. n The min. water volume of 5 l/kW cooling capacity with active cooling must be observed.

. An additional heat generator can be installed to cover peak loads.

1: Hot water 2: Cold water 3: Unmixed cycle 4: Mixed cycle 5: Mixed cycle

REMKO LWM series

6 Emergency-heat

operation

If the compressor fails, you can start emergencyheat operation as follows:

1. Activation of emergency-heat operation is only possible in the expert level of the SmartControl regulation. T "Expert" level on the basic display.

2. After activating the expert level by touching the REMKO logo, a password is required (the password is: "0321").

3. After confirmation, +/- symbols are displayed at the bottom. The password can be set by touching the +/- symbols. After the entry confirm with "OK".

The REMKO default password for the expert level is "0321". If this password has not already been changed, the expert level is enabled after entering this password.

After the expert level has been enabled, various parameter levels are visible.

4. Select the "Settings" level by touching the "Settings" icon.

5. After selecting the "Settings" level, select the "Basic settings" parameter

6. The "System configuration" parameter appears in the "Basic settings" level. Select this icon by touching it.

7. After selecting the "System configuration" level, select the "Heat pump" parameter

8. Then deactivate the heat pump in the “Heat pump” level by touching the “activated” icon and changing the operating mode setting from “activated” to “deactivated”.

The heat pump is now deactivated.

o do this, select the

With deactivation of the heat pump, the second heat generator iary heater or a condensing unit installed in the system is active.

NOTICE!

If the heat pump is switched of gering the fuse, the water must be drained manually to prevent freezing.

, e.g. the REMKO Smart-Serv auxil-

f, e.g. by trig-

7 Cooling with room tem-

perature/humidity probe

Description of the Cooling Installation

Cooling via the mixed heating cycle (surface heating cycle )

If the heat pump is to be used for cooling, then this must be possible via the heating cycle. The hydraulic connection is identical to the connection for the heating cycle. If the mixed cycle is used for heating or cooling, it will be connected as shown in Fig. 42 and Fig. 41. The probes S12 and S1 measure the inlet and return flow temperatures, if a heating/cooling buffer is used. Dew-point monitoring is required for this.

Dew point regulation via room temperature/ humidity probe

If cooling via the surface heating is also required in summer, this can only be activated in conjunction with the Smart-Control Touch and the appropriate room temperature/humidity probe. Only with the use of the REMKO room temperature/humidity probe it is possible to use a cooling curve in order not to fall below the dew point. The remote control of the Smart-Control Touch regulation does not have its own humidity probe, therefore the room temperature/humidity probe must always be used if surface cooling is required.

As of software version 4.24, the mixing valves can mix at different inlet temperatures.

Cooling via a parallel buffer tank as a system limit

If the system is operated using a parallel buffer tank that acts as a system limit on the consumer circuit, no probe must be installed in the living room if the regulation of the consuming cooling circuit is operated via a third-party controller.

NOTICE!

Minimum water volume

If the system/water volume in the cooling circuit provided by the customer is less than the min. water volume, an additional buf ommended to increase the volume. This can be incorporated as a serial buffer in the return flow or as a hydraulic compensator. The KPS series buffer tank can be supplied by REMKO for this.

fer tank is rec-

The water temperature in the pipes is maintained above the nominal dewpoint temperature by the controller tion of condensation on the exposed pipes as well as those concealed under the plaster.

It is also recommended to install a 230 V dewpoint monitor with the associated pipe temperature sensors to the feed pipes outside the heat pump. The location should be selected so that it does not favour the temperature falling below the dewpoint. The dewpoint monitor is wired so that it divides the connector in the feed line to the utility company switch to the controller (inlet S16) or the external heating cycle pump in order to switch of pump.

, in order to prevent the forma-

f the heat

REMKO LWM series

8 Water treatment

Oxygen always plays a role if metal materials in a heating system corrode. The pH value and the salt content also play a major role. A licensed plumber who would like to be able to guarantee his customers a hot water heating system not at risk of corrosion from oxygen - without the use of chemicals - must pay attention to the following:

n Correct system design by the heating builder/

planner and

n depending on the materials installed: filling the

heating system with demineralised soft water or fully deionised water after 8 to 12 weeks.

VDI 2035 applies for the system types listed below. If the guide values for filling, replenishment and circulation water are exceeded, the water must be pre-conditioned.

Total hardness [°dH] subject to the specific system volume

Total rated output in kW < 20 l/kW ³ 20 l/kW and <50 l/kW ³ 50 l/kW

to 50 kW £16.8 °dH £1

, checking the pH value

Scope of application of VDI 2035:

n Domestic hot-water heating systems as per

DIN 4753 (sheet 1 only)

n Water heating systems as per DIN EN 12828

inside the building up to an inlet temperature of 100°C

n Systems that serve building complexes and

with a replenishment water volume during their service life that is a maximum of twice the filling water volume.

See the following table for the requirements in accordance with VDI 2035 Part 1 with regard to total hardness.

1.2 °dH £0.11 °dH

The following table provides the allowed oxygen content in connection with the salt content.

Reference values for the hot water in accordance with VDI 2035 Part 2

low-salt saline

Electrical conductivity at 25°C

Oxygen content mg/l < 0.1 < 0.02

pH value at 25°C 8.2 - 10.0 *)

*) For aluminium and aluminium alloys, the pH range is restricted: pH value at 25 °C is 8.2-8.5 (max. 9.0 for aluminium alloys)

Water treatment with chemicals

Adding chemicals to treat water should only be done as an exception. VDI 2035 Part 2 requires explicitly under Point 8.4.1 that all water treatment be explained and documented in the system log book. There is a reason for this, because unprofessional use of chemicals leads:

n frequently to the failure of elastomer materials n to blocking and sedimentation due to the

sludge that forms

μS/cm < 100 100-1,500

n to defective anti-friction seals on pumps n to the formation of biofilms that cause micro-

bially influenced corrosion and/or that can substantially impair thermal transfer

In low-salt water and the correct pH for a short time even to oxygen concentrations up 0.5 mg / l are tolerated.

NOTICE!

Filling of heating system with completely deionised water

Initial filling Year 2 Year 3 Year 4

Filled on

System volume

[litres]

°dH value

pH value

Conductivity

[µS/cm]

Conditioning agent

(name and quantity)

Molybdenum content

[mg/l]

Signature

Technical changes and errors reserved.

Your heating contractor:

Perform annual

control measurement!

VDI directive 2035

Perform annual

control measurement!

Heat pump systems and components from REMKO must be filled and operated with deionised water (completely desalinated). W from us. Full protection with glycol should be used in cooling systems. The system water should be tested each time the plant is serviced, but at least once a year. Damage that results from non-compliance is not covered by the guarantee. Below you will find a suitable form for documenting the filling of the system.

e also recommend the use of the complete heating protection unit available

Fig. 43: Form for logging filling with completely deionised water

Media pumped by the Grundfos pump

The pump is suitable for circulation of the following media:

n Pure, low viscosity

explosive media without solid or long-fibre components

n Mineral oil free coolants

, non-aggressive and non-

REMKO LWM series

n Softened water

The kinematic viscosity of water is ϑ= 1 mm2/s (1 cSt) at 20 °C. If you use the pump to pump liquids with a dif will be reduced.

Example: A water-glycol mixture with 50% glycol content has a viscosity of approx. 10 mm2/s (10 cSt) at 20 °C. Then the pumping capacity is reduced by approx. 15 %.

No additives must be added to the water which could impair the function of the pump.

The viscosity of the pumped medium must be taken into account when designing the pump.

ferent viscosity, the max. pump pressure

9 Commissioning the

refrigeration system

Commissioning

NOTICE!

Commissioning should only be performed and documented by specially trained personnel.

Observe the operating manual for the indoor units and outdoor components when commissioning the entire system.

Once all the components have been connected and tested, the system can be put into operation. A functional check should be performed to verify its correct function and identify any unusual operating behaviour prior to handing it over to the operator This check is dependent on the installed indoor units. The processes are specified in the operating manual for the indoor units being commissioned.

Functional checks and test run

Check the following points:

n Leak tightness of the cooling cycle n Compressor and fan running smoothly n Issue of cold air in heating mode. n Function test of all program sequences. n Check of the surface temperature of the suc-

tion pipe and that the vaporiser is not overheating. To measure the temperature, hold the thermometer to the suction pipe and subtract the boiling point temperature reading on the pressure gauge from the measured temperature.

n Record the measured temperatures in the

commissioning report.

Function test of heating operating mode

1. Open the on-site valves.

2. Check all connections for leaks with suitable

leak detectors. If leaks are found, the faulty connection must be remedied.

3. Activate the main circuit breaker or fuse.

4. Program the Smart-Control T

5. Switch on heating mode

Due to the turn on delay will start up a few minutes later.

6. Check all regulating, control and safety devices for function and correct adjustment during the test run.

7. Measure all cooling data and record the measured values in the commissioning report.

ouch.

, the compressor

CAUTION!

Danger of injury from refrigerant!

Refrigerant degreases the skin on contact and may cause cold burns.

Therefore:

- W

ear chemical-resistant protective gloves when undertaking any work involving refrigerants.

-Safety glasses must be worn to protect the eyes.

NOTICE!

Check the overheating to determine the refrigerant fill quantity.

Final tasks

n Use the Smart-Control T

temperature to the required value.

n Mount all removed parts. n Familiarise the operator with the system.

NOTICE!

Check that the shut-of are tight after carrying out any work on the cooling cycle. Use appropriate sealant products as necessary.

Adding refrigerant

DANGER!

ork on the cooling circuit may be undertaken only by trained specialist personnel! (technical specialist category I)

ouch to set the target

f valves and valve caps

NOTICE!

The escape of refrigerant contributes to climatic change. In the event of escape, refrigerant with a low greenhouse potential has a lesser impact on global warming than those with a high greenhouse potential. This device contains refrigerant with a greenhouse potential of 1975. That means the escape of 1 kg of this refrigerant has an ef 1975 times greater than 1 kg CO2, based on 100 years. Do not conduct any work on the refrigerant circuit or dismantle the device always enlist the help of qualified experts.

fect on global warming that is

DANGER!

Only refrigerant in a liquid state may be used to fill the cooling cycle!

REMKO LWM series

10 Electrical wiring

Important Information

You can find information on the electrical connections of the indoor and outdoor unit, on the terminal assignment of the I/0 module, as well as on the circuit diagrams in the separate "Electrical wiring" operating instructions

NOTICE!

For an existing block the heat pump by the utility (utility switching) must be used the control contact S 16 of the Smart-Control.

11 Before commissioning

Observe the following points before commissioning:

n The heating system is filled with DI water in

accordance with VDI 2035. W addition of REMKO full heating protection (see

Chapter 8 ‘Water treatment’ on page 48).

n - A water or system temperature of min. 20°C

in the return flow must be ensured (e.g. with a heating element/emergency heating operation).

n The entire heating system is rinsed, cleaned

and de-aerated (incl. hydraulic balancing).

n The heat pump is not released if an outside

temperature under 10°C is measured at the external probe and the water inlet temperature (return flow) is under 15°C.

NOTICE!

No commissioning can take place if the above named points are not observed. Damage resulting from this is not covered by the guarantee!

e recommend the

NOTICE!

All connections must be properly insulated in accordance with applicable standards.

1 2

3 4

12 Commissioning

The Smart-Control Touch is used to operate and control the complete heating system. The SmartControl Touch is operated via the touch display.

n The unit is pre-installed at the factory

reset of the Smart-Control Touch, the default parameters are loaded.

n An intensive visual inspection is to be carried

out before the actual commissioning.

n Switch on the power supply. n Then the pre-installed data is loaded and the

parameters can be set with the help of the commissioning wizard or in the system configuration. You can find information on this in the separate operating instructions of the SmartControl Touch.

NOTICE!

Before commissioning the entire system, including hot water tank, must be filled!

. After a

Function display

Unit operation is intuitive and self-explanatory via the plain text display on the user interface on the touch display and change parameters. Instead, this takes place by touching the surface of the controller at the appropriate points. The installation of further functions such as KNX or Smart-Web is possible through the installation of further supplementary software available as an accessory.

You can access the expert level by touching the REMKO logo in the upper right corner of the display. After entering the password (0321) using the +/- combination and then touching the "Next" and "OK" displays, the expert level is enabled.

. No buttons are required to adjust

Overview of the controls

Fig. 44: Controls of the Smart Control Touch

1: Overview (quick access) 2: Information (quick access) 3: Settings (quick access) 4: Messages (warnings, information notes and

errors)

REMKO LWM series

13 Care and maintenance

Regular care and maintenance assure fault-free operation and long service life for the heat pump system.

n T

o perform the statutory leak test where applicable, it is necessary to arrange a yearly maintenance contract with an appropriate specialist firm.

n The heat pump must be kept free of dirt,

growth and other deposits.

n The unit is to be cleaned with a damp cloth. In

doing so, ensure that no caustic, abrasive or solvent-based cleaning products are used. Use of powerful water jets is to be avoided.

n Open the unit regularly and carry out mainte-

nance. For this, the evaporator fins must be cleaned and impurities removed from the unit if necessary. Special attention should be paid to the condensate drainage. Proper drainage of any condensate that accumulates must always be ensured.

NOTICE!

14 Temporary shutdown

The system may not be switched off at the mains power supply even if the heating system is not used for heating purposes over an extended period (e.g. holidays)!

n The system is to be switched to "Stand-by"

mode for heating during temporary shutdowns and for hot water it should be switched to "Of mode.

n Heating phases can be programmed for the

duration of the period of absence.

n The previous operating mode has to be

switched back on when the shutdown phase is over.

n Instructions for changing the mode appear in

the corresponding chapter of the Smart-Control manual.

NOTICE!

In "Standby", the heat pump is in standby mode. Of the entire system, only the frost-protection function s activated.

The heat pump may only be opened by trained specialist personnel.

NOTICE!

Please note that an unnoticed power failure can lead to frost damage!

15 Troubleshooting and customer service

General troubleshooting

The unit has been manufactured using state-of-the-art production methods and has been tested several times to ensure that it works properly be checked against the following list. Please inform your dealer if the unit is still not working correctly after all of the functional checks have been performed.

Malfunction Possible causes Remedial measures

. However, in the event that malfunctions should occur, the unit should

The heat pump does not start or switches itself of

Heating cycle pump does not switch of

Power failure, under-voltage

Defective mains fuse/main switch turned of

Damaged power supply Repair by specialist firm

Power company off-period

Operational temperature limits too low or too high

Nominal temperature exceeded, incorrect operating mode

Disconnect the outdoor unit, then

Incorrect pump switching action

Check the voltage and, if necessary, wait for it to come back on

Exchange mains fuse, master switch on

Wait until the power-company off-period is over and the heat pump starts up as required

Observe temperature ranges

The set-point temperature has to be higher than the heat generator temperature mode

establish the correct terminal sequence using the connection plan. Re-establish voltage to the outdoor unit. Also make sure that the protective earth is connected correctly

Have pump switching of the "heating cycle" checked out at specialist level

, check

Heating cycle pumps fail to switch on

Incorrect operating mode set Check mode

Control board fuse in indoor units switching cabinet faulty

Incorrect heating program set

Temperature overlapping, e.g. outside temperature greater than room temperature

Exchange the fuse on the left side of the control board

Check heating program. In the cold heating period, we recommend the ‘heating’ operating mode

Check temperature ranges. Sample test!

REMKO LWM series

16 General view of unit and spare parts

16.1 Exploded view of the unit LWM 80-150

Fig. 45: Exploded view drawing

We reserve the right to modify the dimensions and design as part of the ongoing technical development process

16.2 Spare parts LWM 80-150

No. Designation LWM 80-150

1 Fin vaporiser

2 Plate heat exchanger

3 Low pressure transducer

4 Smart Serv heating element 7.5 kW

5 Circulation pump

6 Ultrasonic flow rate meter

7 4-way changeover valve

8 High pressure switch

9 High pressure transducer

10 Compressor

11 EEV coil

12 Electronic expansion valve

13 Filter dryer

14 Cover RAL 9006

Aluminium finned grille

Graphite finned grille

Camura finned grille

16 Air outlet bottom cover plate RAL 7021

17 Side cover plate RAL 9006

18 Rear pipe inlet cover plate

19 Air intake cover plate

To ensure the correct delivery of spare parts, please always provide the unit type with its corresponding serial number (see name plate).

On request by providing the serial number

REMKO LWM series

Spare parts not illustrated

Designation LWM 80-150

Inverter (frequency converter)

Wave-trap

Hot gas sensor probe (inverter)

Cooling cycle control board

Inverter-control board control cable

Pressure transducer control cable

Temperature sensor

Control board plug set

Complete fan

I/O unit

Smart-Control Touch display surface mounting

Smart-Control Touch indoor unit display

SD card

Coding resistance

To ensure the correct delivery of spare parts, please always provide the unit type with its corresponding serial number (see name plate).

On request by providing the serial number

17 General terms

All-in-one unit

Design in which all refrigeration components are installed in one housing. No refrigeration work has to be carried out.

Annual power input factor

The annual power input factor indicates the power input (e.g. electrical energy) required in order to achieve a certain benefit (e.g. heating energy). The annual power input factor includes the energy required for auxiliary drives.

Bivalent mode

The heat pump provides the entire heating energy down to a predetermined outdoor temperature (e.g. -3 °C). If the temperature drops below this value, the heat pump switches off and the secondary heating appliance takes over the heating, e.g. a heating boiler.

Coefficient of performance

The current ratio of thermal output produced by the heat pump to the consumed electrical power is referred to as the coefficient of performance, as measured under standardised boundary conditions according to EN 255 / EN 14511. A coefficient of performance of 4 means that a usable thermal output amounting to 4-times the electrical power consumption is available.

Energy supply company switching

Certain energy supply companies of iffs for the operation of heat pumps.

When switching off the power supply companies only on the barrier is in contact only requirement of a heat source (heat pump) is blocked. Be switched off at monoenergetic operation, the power supply of the electric heating element with.

Evaporator

Heat exchanger on a refrigerant plant which uses the evaporation of a working medium in order to extract heat from its environment at low temperatures (e.g. the outdoor air).

Expansion valve

Heat pump component for lowering the condensing pressure on the vapour tension. In addition, the expansion valve regulates the quantity of injected refrigerant in relation to the evaporator load.

Heat carrier

Liquid or gas medium (e.g. water which heat is transported.

fer special tar-

, brine or air), in

Compressor (condenser)

Unit designed for the mechanical conveyance and compression of gasses. Compression serves to significantly increase the pressure and temperature of the medium.

Condenser

Heat exchanger on a refrigerant plant which liquefies a working medium in order to transmit heat to its environment (e.g. the heating system).

Defrost

At outdoor temperatures below 5 °C it is possible that ice may form on the evaporators of air/water heat pumps. The removal of this ice is referred to as defrosting and is undertaken by supplying heat, either regularly or as requirements dictate. Air/ water heat pumps with circuit reversal are distinguished by their requirements-based, quick and energy-efficient defrosting system.

Heat pump system

A heat pump system consists of a heat pump and a heat source system. For brine and water/water heat pumps, the heat source system must be made available separately.

Heat source

Medium from which the heat pump derives heat, in other words, soil, air and water.

Heating output

Flow of heat emitted from the liquefier to the environment. The heating output is the sum of the electrical power consumed by the condenser and the heat flux obtained from the environment.

Inverter

Power regulator which serves to match the speed of the compressor motor and the speed of the evaporator fans to the heating requirement.

REMKO LWM series

Limit temperature / bivalence point

Outdoor temperature where the secondary heating appliance cuts in under bivalent operation.

Monovalent mode

In this mode, the heat pump is the sole heating appliance in the building all year round. Monovalent mode is primarily used in combination with brine/water and water/water heat pumps.

Noise

Noise is transmitted in media such as air or water Essentially there are two types of noise, airborne sound and solid-borne sound. Airborne sound is transmitted entirely via the air. Solid-borne sound is transmitted in solid materials or liquids and is only partially radiated as airborne sound. The audible range of sound lies between 20 and 20,000 Hz.

Refrigerant

The working medium used in a refrigerant plant, e.g. heat pump, is referred to as the refrigerant. The refrigerant is a liquid which is used for thermal transfer in a refrigeration plant and which is able to absorb heat by changing its state at low temperatures and low pressures. A further change of state at higher temperatures and higher pressure serves to dissipate this heat.

Refrigerating capacity

Heat flux extracted from the environment by the evaporator (air, water or soil).

Regulations and guidelines

The erection, installation and commissioning of heat pumps has to be undertaken by qualified specialist engineers. In doing so, various standards and directives are to be observed.

Seasonal performance factor

The seasonal performance factor relates to the ratio of heat content delivered by the heat pump system to the supplied electrical energy in one year. It may not be compared to the performance number. The seasonal performance factor expresses the reciprocal of the annual power input factor.

Single energy-source mode

The heat pump covers a large proportion of the required thermal output. On a few days per year an

electrical heating coil supplements the heat pump under extremely low outdoor temperatures. Dimensioning of the heat pump for air/water heat pumps is generally based on a limit temperature (also known as balance point) of approx. -5 °C.

Sound pressure level

The sound pressure level is a comparable characteristic quantity for the radiated acoustic output of a machine, for example, a heat pump. The noise emission level at certain distances and acoustic environments can be measured. The standard is based on a sound pressure level given as a nominal noise level.

Split AC unit

Design where one part of the device is positioned outdoors and the other inside the building. Both units are connected to each other by a refrigerant pipe.

Storage tank

The installation of a hot-water storage tank is generally recommended in order to extend the running time of the heat pump under low heat requirements. A storage tank is required for air/water heat pumps in order to bridge off-periods.

Seal inspection

System operators are obliged to ensure the prevention of refrigerant leakage in accordance with the directive on substances that deplete the ozone layer (EC 2037/2000) and the Regulation on Certain Fluorinated Greenhouse Gases (EC 842/2006). In addition, a minimum of one annual service and inspection must be carried out, as well as a sealing test for refrigerating plants with a refrigerant filling weight over 3 kg.

18 Index

Adding refrigerant ....................... 51

Air change coef Assembly

Strip foundation ...................... 40

Average condition .................... 11, 12

ficient .................... 32

Circulation pump

Characteristic curves .................. 16

Motor protection ...................... 16

Pressure losses ...................... 16

Colder condition ..................... 11, 12

Condensate drainage connection and secure

discharge ............................. 40

Controls, Overview ...................... 53

Cooling mode .......................... 34

COP ............................... 8, 10

Diagram, cooling cycle ................... 15

Disposal of equipment .....................6

Dynamic cooling ........................ 34

Emergency-heat operation ................ 46

Environmental protection ...................6

Function display ........................ 53

Heat pump

Design example ...................... 32

Function of the heat pump .............. 31

Layout ............................. 32

Heating coefficient .....................8, 10

Heating performance diagram .............. 33

Humidity probe ......................... 47

Passive cooling ......................... 34

Pipe heater ............................ 41

Propellant in accordance with Kyoto Protocol

8, 10

Refrigerant circuit diagram ................ 15

Requirement for heat transmission .......... 32

Room temperature probe ................. 47

Safe drainage in the event of leakages ....... 41

Safety

Dangers of failure to observe the safety

notes ............................... 4

General ............................. 4

Identification of notes ................... 4

Note for inspection work .................5

Note for installation work ................ 5

Note for maintenance work .............. 5

Personnel qualifications ................. 4

Safety notes for the operator ............. 5

Safety-conscious working ................5

Unauthorised modification ...............5

Unauthorised replacement part manufacture . 5

Set-up

Heat pump .......................... 37

Sound intensity ................... 18, 19, 20

System layout .......................... 35

Thermal transfer coefficient ................32

Total sound power level ............. 18, 19, 20

Troubleshooting

General troubleshooting ................ 55

Unit description ......................... 31

Unit dimensions ........................ 13

Intended use ............................ 5

Minimum distances of the heat pump ........ 39

Ventilation heat requirement ............... 32

Warmer condition .................... 11, 12

Warranty ............................... 6

Ordering spare parts ..................... 57

REMKO LWM series

REMKO QUALITY WITH SYSTEMS

Air-Conditioning | Heating | New Energies

Telephone +49 (0) 5232 606-0 Telefax +49 (0) 5232 606-260

E-mail info@remko.de URL www.remko.de

REMKO GmbH & Co. KG Klima- und Wärmetechnik

Im Seelenkamp 12 32791 Lage

Hotline within Germany

+49 (0) 5232 606-0

Hotline International

+49 (0) 5232 606-130

We reserve the right to make technical changes, and provide no guarantee as to the accuracy of this data!

REMKO LWM Series, LWM 80, LWM 110, LWM 150, LWM 110 Duo Operating And Installation Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of contents

1.1 General safety notes

Identification of notes

1.3 Personnel qualifications

1.5 Safety-conscious working

Safety notes for the operator

1.7 Safety notes for installation, maintenance and inspection

1.8 Unauthorised modification and changes

1.9 Intended use

Warranty

1.11 Transport and packaging

1.12 Environmental protection and recycling

2 Technical data

2.1 Unit data

2.2 Product data

2.3 Unit dimensions of indoor units

2.4 Diagram, cooling cycle

2.5 Heat pump usable limits in monovalent operation

2.6 Pump characteristics and circulation pump pressure losses

2.7 Total sound power level

2.8 Characteristic curves

3 Unit description

4 Assembly

4.1 System layout

4.2 General installation notes

5 Hydraulic connection

8 Water treatment

10 Electrical wiring

11 Before commissioning

12 Commissioning

13 Care and maintenance

14 Temporary shutdown

15 Troubleshooting and customer service

16 General view of unit and spare parts

16.1 Exploded view of the unit LWM 80-150

16.2 Spare parts LWM 80-150

17 General terms

18 Index