Vaillant VWL 35/5 AS 230V S2 User manual

da Betjeningsvejledning
da Installations- og vedligeholdelsesvejledning
en Operating instructions
en Installation and maintenance instructions
fi Käyttöohjeet
fi Asennus- ja huolto-ohjeet
no Bruksanvisning
no Installasjons- og vedlikeholdsanvisning
sv Bruksanvisning
sv Anvisningar för installation och underhåll
en Country specifics
aroTHERM
VWL 35/5 AS 230V S2 ... VWL 125/5 AS S2
0020257297_07 - 09.03.2022

42 Operating instructions 0020257297_07
Operating instructions
Contents
1Safety..................................................................43
1.1 Action-related warnings ....................................... 43
1.2 Intended use ........................................................ 43
1.3 General safety information .................................. 43
2Notesonthedocumentation............................45
2.1 Validity of the instructions.................................... 45
3Productdescription...........................................45
3.1 Heat pump system............................................... 45
3.2 Functions of the heat pump ................................. 45
3.3 Product design..................................................... 45
3.4 Data plate and serial number .............................. 45
3.5 CE marking .......................................................... 45
3.6 Fluorinated greenhouse gases ............................ 45
4Operation............................................................45
4.1 Switching on the product ..................................... 45
4.2 Operating the product.......................................... 46
4.3 Guaranteeing frost protection .............................. 46
4.4 Switching off the product ..................................... 46
5Careandmaintenance......................................46
5.1 Keeping the product clear.................................... 46
5.2 Cleaning the product............................................ 46
5.3 Maintenance ........................................................ 46
6Troubleshooting................................................46
6.1 Eliminating faults.................................................. 46
7Decommissioning..............................................46
7.1 Temporarily decommissioning the product.......... 46
7.2 Permanently decommissioning the product......... 46
8Recyclinganddisposal.....................................46
8.1 Arranging disposal of refrigerant ......................... 46
9Guaranteeandcustomerservice.....................47
9.1 Guarantee............................................................ 47
9.2 Customer service................................................. 47

0020257297_07 Operating instructions 43
1Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
danger using the following warning symbols
and signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of
severe personal injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental
damage
1.2 Intended use
There is a risk of injury or death to the user or
others, or of damage to the product and other
property in the event of improper use or use
for which it is not intended.
The product is the outdoor unit of an air-to-
water heat pump with split construction.
The product uses the outdoor air as a heat
source and can be used to heat a residential
building and for domestic hot water genera-
tion.
The product is only intended for outdoor in-
stallation.
The product is intended exclusively for do-
mestic use.
The intended use only allows for these
product combinations:
Outdoor unit Indoor unit
VWL ..5/5 AS ... VWL ..8/5 IS ...
VWL ..7/5 IS ...
Intended use includes the following:
–observance of the operating instructions
included for the product and any other
installation components
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
This product can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capabil-
ities or lack of experience and knowledge if
they have been given supervision or instruc-
tion concerning use of the product in a safe
way and understand the hazards involved.
Children must not play with the product.
Cleaning and user maintenance work must
not be carried out by children unless they are
supervised.
Any other use that is not specified in these
instructions, or use beyond that specified in
this document, shall be considered improper
use. Any direct commercial or industrial use
is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
1.3 General safety information
1.3.1 Risk of death due to changes to the
product or the product environment
▶Never remove, bridge or block the safety
devices.
▶Do not tamper with any of the safety
devices.
▶Do not damage or remove any tamper-
proof seals on components.
▶Do not make any changes:
–The product itself
–To the supply lines
–On the drain pipework
–On the expansion relief valve for the
heat source circuit
–to constructional conditions that may
affect the operational reliability of the
product
1.3.2 Risk of injury from freezing caused
by touching refrigerant
The product is delivered with an operational
filling of R410A refrigerant. Escaping refri-
gerant may cause freezing if the exit point is
touched.
▶If refrigerant escapes, do not touch any
components of the product.
▶Do not inhale any vapours or gases that
escape from the refrigerant circuit as a
result of leaks.

44 Operating instructions 0020257297_07
▶Avoid skin or eye contact with the refriger-
ant.
▶In the event of skin or eye contact with the
refrigerant, seek medical advice.
1.3.3 Risk of injury from burns caused by
touching refrigerant pipes
The refrigerant pipes between the outdoor
unit and the indoor unit may become ex-
tremely hot during operation. There is a risk
of burns.
▶Do not touch any uninsulated refrigerant
pipes.
1.3.4 Risk of injury and material damage
due to maintenance and repairs
carried out incorrectly or not carried
out at all
▶Never attempt to carry out maintenance
work or repairs on your product yourself.
▶Faults and damage should be immediately
eliminated by a competent person.
▶Adhere to the maintenance intervals spe-
cified.
1.3.5 Risk of malfunctions caused by
incorrect power supply
The power supply must remain within the
specified limits so that the product does not
malfunction:
–Single-phase: 230 V (+10/-15%), 50 Hz
–Three-phase: 400 V (+10/-15%), 50 Hz
1.3.6 Risk of material damage caused by
frost
▶Ensure that the heating installation always
remains in operation during freezing con-
ditions and that all rooms are sufficiently
heated.
▶If you cannot ensure the operation, have a
competent person drain the heating install-
ation.
1.3.7 Risk of environmental damage
caused by escaping refrigerant
The product contains the refrigerant R410A.
This refrigerant must not be allowed to es-
cape into the atmosphere. R410A is a fluor-
inated greenhouse gas covered by the Kyoto
Protocol, with a GWP of 2088 (GWP = Global
Warming Potential). If this gas escapes into
the atmosphere, its impact is 2088 times
greater than the natural greenhouse gas CO2.
Before the product is disposed of, the refri-
gerant that is contained in it must be com-
pletely drained into a suitable vessel so that
it can then be recycled or disposed of in ac-
cordance with regulations.
▶Ensure that only an officially certified com-
petent person with appropriate protective
equipment carries out installation or main-
tenance work or any other form of inter-
vention on the refrigerant circuit.
▶Arrange for the refrigerant that is contained
in the product to be recycled or disposed
of by a certified competent person in ac-
cordance with the regulations.
1.3.8 Danger caused by improper
operation
Improper operation may present a danger to
you and others, and cause material damage.
▶Carefully read the enclosed instructions
and all other applicable documents, par-
ticularly the "Safety" section and the warn-
ings.
▶Only carry out the activities for which in-
structions are provided in these operating
instructions.

0020257297_07 Operating instructions 45
2Notesonthedocumentation
▶Always observe all the operating and installation instruc-
tions included with the system components.
▶Pass these instructions and all other applicable docu-
ments on to the end user.
2.1 Validity of the instructions
These instructions apply only to:
Product
VWL 35/5 AS 230V S2
VWL 55/5 AS 230V S2
VWL 75/5 AS 230V S2
VWL 105/5 AS 230V S2
VWL 105/5 AS S2
VWL 125/5 AS 230V S2
VWL 125/5 AS S2
3Productdescription
3.1 Heat pump system
Design of a typical heat pump system with split technology:
1 2
4
3
5
6
1 Outdoor unit
2 eBUS line
3Systemcontrol
4 Control for the indoor
unit
5 Indoor unit
6 Refrigerant circuit
3.2 Functions of the heat pump
The heat pump has a closed refrigerant circuit in which refri-
gerant circulates.
Cyclic evaporation, compression, liquefaction and expansion
takes in heat energy from the surroundings and transfers it to
the building. In cooling mode, heat energy is extracted from
the building and released into the environment.
3.3 Product design
3
1
2
1 Air inlet grille
2 Data plate
3 Air outlet grille
3.4 Data plate and serial number
The data plate is located on the right-hand side of the pro-
duct's exterior.
The data plate includes the nomenclature and the serial
number.
3.5 CE marking
The CE marking shows that the products comply with the
basic requirements of the applicable directives as stated on
the declaration of conformity.
The declaration of conformity can be viewed at the manufac-
turer's site.
3.6 Fluorinated greenhouse gases
The product contains fluorinated greenhouse gases.
4Operation
4.1 Switching on the product
▶Switch on all of the disconnectors to which the product is
connected in the building.

46 Operating instructions 0020257297_07
4.2 Operating the product
▶It is operated via the indoor unit's control (→Operating
instructions for the indoor unit).
4.3 Guaranteeing frost protection
1. Ensure that the product is switched on and remains
switched on.
2. Ensure that no snow accumulates around the air inlet
grille and air outlet grille.
4.4 Switching off the product
1. Switch off all of the disconnectors to which the product
is connected in the building.
2. Guarantee the frost protection.
5Careandmaintenance
5.1 Keeping the product clear
1. Regularly remove branches and leaves that have
gathered around the product.
2. Regularly remove leaves and dirt from the ventilation
grille below the product.
3. Regularly remove snow from the air inlet grille and from
the air outlet grille.
4. Regularly remove snow that has gathered around the
product.
5.2 Cleaning the product
1. Clean the casing with a damp cloth and a little solvent-
free soap.
2. Do not use sprays, scouring agents, detergents,
solvents or cleaning agents that contain chlorine.
5.3 Maintenance
Danger!
Risk of injury and risk of material damage
due to neglected or incorrect maintenance
and repairs.
Neglected or incorrect maintenance work or
repairs may lead to personal injury or dam-
age to the product.
▶Never attempt to carry out maintenance
work or repairs on the product.
▶Employ an authorised installation com-
pany to complete such work. We recom-
mend making a maintenance contract.
6Troubleshooting
6.1 Eliminating faults
▶If you observe a cloud of vapour on the product, you do
not have to do anything. This effect may arise during the
thawing process.
▶If the product will no longer start up, check whether the
power supply is interrupted. If required, switch on all of
the disconnectors to which the product is connected in
the building.
▶Contact a competent person if the measure that is de-
scribed is unsuccessful.
7Decommissioning
7.1 Temporarily decommissioning the product
1. Switch off all of the disconnectors to which the product
is connected in the building.
2. Protect the heating installation against frost.
7.2 Permanently decommissioning the product
▶Have a competent person permanently decommission
the product.
8Recyclinganddisposal
▶The competent person who installed your product is re-
sponsible for the disposal of the packaging.
If the product is labelled with this mark:
▶In this case, do not dispose of the product with the
household waste.
▶Instead, hand in the product to a collection centre for
waste electrical or electronic equipment.
If the product contains batteries that are labelled with
this mark, these batteries may contain substances that are
hazardous to human health and the environment.
▶In this case, dispose of the batteries at a collection point
for batteries.
8.1 Arranging disposal of refrigerant
The product is filled with R410A refrigerant.
▶Refrigerant must only be disposed of by an authorised
competent person.
▶Observe the general safety information.

0020257297_07 Operating instructions 47
9Guaranteeandcustomerservice
9.1 Guarantee
You can find information about the manufacturer's guarantee
in the Country specifics.
9.2 Customer service
You can find contact details for our customer service in the
Country specifics.

48 Installation and maintenance instructions 0020257297_07
Installation and maintenance
instructions
Contents
1Safety..................................................................49
1.1 Action-related warnings ....................................... 49
1.2 Intended use ........................................................ 49
1.3 General safety information .................................. 49
1.4 Regulations (directives, laws, standards) ............ 50
2Notesonthedocumentation............................51
2.1 Validity of the instructions.................................... 51
2.2 Further information .............................................. 51
3Productdescription...........................................51
3.1 Heat pump system............................................... 51
3.2 Cooling mode....................................................... 51
3.3 Functions of the heat pump ................................. 51
3.4 Description of the product.................................... 52
3.5 Product design..................................................... 52
3.6 Information on the data plate............................... 53
3.7 CE marking .......................................................... 53
3.8 Connection symbols ............................................ 53
3.9 Application limits .................................................. 53
3.10 Thawing mode ..................................................... 54
3.11 Safety devices ..................................................... 54
4Set-up..................................................................55
4.1 Unpacking the product......................................... 55
4.2 Checking the scope of delivery............................ 55
4.3 Transporting the product ..................................... 55
4.4 Dimensions .......................................................... 55
4.5 Complying with minimum clearances .................. 56
4.6 Conditions for the installation type....................... 56
4.7 Requirements for the installation site .................. 57
4.8 Creating a foundation .......................................... 58
4.9 Guaranteeing occupational safety ....................... 58
4.10 Installing the product............................................ 58
4.11 Connecting the condensate discharge pipe ........ 58
4.12 Setting up a protective wall.................................. 59
4.13 Removing/installing the casing sections.............. 59
5Hydraulicsinstallation......................................61
5.1 Preparing work on the refrigerant circuit.............. 61
5.2 Planning the routing of the refrigerant pipes........ 61
5.3 Routing refrigerant pipes to the product .............. 62
5.4 Routing refrigerant pipes in the building .............. 62
5.5 Remove the cover for the hydraulic
connections.......................................................... 63
5.6 Cutting the pipes to length and flaring the pipe
ends ..................................................................... 63
5.7 Connecting the refrigerant pipes ......................... 63
5.8 Checking the refrigerant circuit for tightness ....... 63
5.9 Evacuating the refrigerant circuit ......................... 64
5.10 Adding additional refrigerant................................ 64
5.11 Releasing the refrigerant ..................................... 65
5.12 Completing work on the refrigerant circuit ........... 65
6Electricalinstallation.........................................65
6.1 Preparing the electrical installation...................... 65
6.2 Requirements for electrical components ............. 65
6.3 Installing components for the energy supply
company lockout function .................................... 66
6.4 Removing the cover for the electrical
connections.......................................................... 66
6.5 Stripping the electrical wire.................................. 66
6.6 Establishing the power supply, 1~/230V.............. 66
6.7 Establishing the power supply, 3~/400V.............. 67
6.8 Connecting the eBUS line ................................... 67
6.9 Connecting accessories ...................................... 67
6.10 Installing the cover for the electrical
connections.......................................................... 67
7Start-up...............................................................67
7.1 Checking before switching on.............................. 67
7.2 Switching on the product ..................................... 68
8Handingovertotheenduser...........................68
8.1 Instructing the end user ....................................... 68
9Troubleshooting................................................68
9.1 Fault messages ................................................... 68
9.2 Other faults .......................................................... 68
10 Inspection and maintenance ............................ 68
10.1 Observing the work plan and intervals ................ 68
10.2 Procuring spare parts .......................................... 68
10.3 Preparing for inspection and maintenance.......... 68
10.4 Carrying out maintenance work........................... 68
10.5 Completing inspection and maintenance............. 69
11 Decommissioning.............................................. 69
11.1 Temporarily decommissioning the product.......... 69
11.2 Permanently decommissioning the product......... 69
12 Recycling and disposal..................................... 69
12.1 Recycling and disposal........................................ 69
12.2 Disposing of the refrigerant ................................. 70
Appendix ............................................................................ 71
AFunctionaldiagram............................................71
BSafetydevices....................................................72
CWiringdiagram...................................................73
C.1 Wiring diagram, power supply, 1~/230V.............. 73
C.2 Wiring diagram, power supply, 3~/400V.............. 74
C.3 Wiring diagram, sensors and actuators ............... 75
DInspectionandmaintenancework...................76
ETechnicaldata....................................................76
Index ................................................................................... 80

0020257297_07 Installation and maintenance instructions 49
1Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
danger using the following warning symbols
and signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of
severe personal injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental
damage
1.2 Intended use
There is a risk of injury or death to the user or
others, or of damage to the product and other
property in the event of improper use or use
for which it is not intended.
The product is the outdoor unit of an air-to-
water heat pump with split construction.
The product uses the outdoor air as a heat
source and can be used to heat a residential
building and for domestic hot water genera-
tion.
The product is only intended for outdoor in-
stallation.
The product is intended exclusively for do-
mestic use.
The intended use only allows for these
product combinations:
Outdoor unit Indoor unit
VWL ..5/5 AS ... VWL ..8/5 IS ...
VWL ..7/5 IS ...
Intended use includes the following:
–observance of accompanying operating,
installation and maintenance instructions
for the product and any other system com-
ponents
–installing and setting up the product in ac-
cordance with the product and system ap-
proval
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
Intended use also covers installation in ac-
cordance with the IP code.
Any other use that is not specified in these
instructions, or use beyond that specified in
this document, shall be considered improper
use. Any direct commercial or industrial use
is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
1.3 General safety information
1.3.1 Risk caused by inadequate
qualifications
The following work must only be carried out
by competent persons who are sufficiently
qualified to do so:
–Set-up
–Dismantling
–Installation
–Start-up
–Inspection and maintenance
–Repair
–Decommissioning
▶Proceed in accordance with current tech-
nology.
1.3.2 Risk of injury due to the heavy weight
of the product
The product weighs over 50 kg.
▶Make sure that the product is carried by at
least two people.
▶Use suitable transport and lifting equip-
ment, in accordance with your job safety
analysis.
▶Use suitable personal protective equip-
ment: Gloves, safety footwear, protective
goggles, protective helmet.
1.3.3 Risk of death due to lack of safety
devices
The basic diagrams included in this docu-
ment do not show all safety devices required
for correct installation.
▶Install the necessary safety devices in the
installation.

50 Installation and maintenance instructions 0020257297_07
▶Observe the applicable national and inter-
national laws, standards and directives.
1.3.4 Risk of death from electric shock
There is a risk of death from electric shock if
you touch live components.
Before commencing work on the product:
▶Disconnect the product from the power
supply by switching off all power supplies
at all poles (electrical partition in over-
voltage category III for full partition, e.g.
fuse or circuit breaker).
▶Secure against being switched back on
again.
▶Wait for at least 3 minutes until the capa-
citors have discharged.
▶Check that there is no voltage.
1.3.5 Risk of burns, scalds and frostbite
due to hot and cold components
There is a risk of burns and frostbite from
some components, particularly uninsulated
pipelines.
▶Only carry out work on the components
once these have reached environmental
temperature.
1.3.6 Risk of injury from freezing caused
by touching refrigerant
The product is delivered with an operational
filling of R410A refrigerant. Escaping refri-
gerant may cause freezing if the exit point is
touched.
▶If refrigerant escapes, do not touch any
components of the product.
▶Do not inhale any vapours or gases that
escape from the refrigerant circuit as a
result of leaks.
▶Avoid skin or eye contact with the refriger-
ant.
▶In the event of skin or eye contact with the
refrigerant, seek medical advice.
1.3.7 Risk of environmental damage
caused by escaping refrigerant
The product contains the refrigerant R410A.
This refrigerant must not be allowed to es-
cape into the atmosphere. R410A is a fluor-
inated greenhouse gas covered by the Kyoto
Protocol, with a GWP of 2088 (GWP = Global
Warming Potential). If this gas escapes into
the atmosphere, its impact is 2088 times
greater than the natural greenhouse gas CO2.
Before the product is disposed of, the refri-
gerant that is contained in it must be com-
pletely drained into a suitable vessel so that
it can then be recycled or disposed of in ac-
cordance with regulations.
▶Ensure that only an officially certified com-
petent person with appropriate protective
equipment carries out installation or main-
tenance work or any other form of inter-
vention on the refrigerant circuit.
▶Arrange for the refrigerant that is contained
in the product to be recycled or disposed
of by a certified competent person in ac-
cordance with the regulations.
1.3.8 Risk of material damage caused by
using an unsuitable tool
▶Use the correct tool.
1.3.9 Risk of material damage caused by
using an unsuitable material
Unsuitable refrigerant pipes may cause ma-
terial damage.
▶Only use special copper pipes designed
for refrigeration technology.
1.4 Regulations (directives, laws,
standards)
▶Observe the national regulations, stand-
ards, directives, ordinances and laws.

0020257297_07 Installation and maintenance instructions 51
2Notesonthedocumentation
▶Always observe all the operating and installation instruc-
tions included with the system components.
▶Pass these instructions and all other applicable docu-
ments on to the end user.
2.1 Validity of the instructions
These instructions apply only to:
Product
VWL 35/5 AS 230V S2
VWL 55/5 AS 230V S2
VWL 75/5 AS 230V S2
VWL 105/5 AS 230V S2
VWL 105/5 AS S2
VWL 125/5 AS 230V S2
VWL 125/5 AS S2
2.2 Further information
▶Scan the displayed code using your smartphone in order
to view further information about the installation.
◁You are guided to installation videos.
3Productdescription
3.1 Heat pump system
Design of a typical heat pump system with split technology:
1 2
4
3
5
6
1 Outdoor unit
2 eBUS line
3Systemcontrol
4 Control for the indoor
unit
5 Indoor unit
6 Refrigerant circuit
3.2 Cooling mode
Depending on the country, the product has the heating mode
or heating and cooling mode function.
Products that are delivered at the factory with no cooling
mode are labelled with "S2" in the nomenclature. For these
units, an optional accessory can be used to subsequently
activate the cooling mode.
3.3 Functions of the heat pump
The heat pump has a closed refrigerant circuit in which refri-
gerant circulates.
In heating mode, cyclic evaporation, compression, liquefac-
tion and expansion take in heat energy from the surround-
ings and transfer it to the building. In cooling mode, heat
energy is extracted from the building and released into the
environment.
3.3.1 Operating principle in heating mode
65
43
1
2
1Evaporator
2 4-port diverter valve
3Fan
4Compressor
5 Expansion valve
6Condenser
3.3.2 Operating principle in cooling mode
Validity: Product with cooling mode
65
43
1
2
1Condenser
2 4-port diverter valve
3Fan
4Compressor
5 Expansion valve
6Evaporator
3.3.3 Noise reduction mode
A noise reduction mode can be activated for the product.
In noise reduction mode, the product operates more quietly
than in normal operating mode. This is achieved using a

52 Installation and maintenance instructions 0020257297_07
limited compressor rotational speed and an adjusted fan
speed.
3.4 Description of the product
The product is the outdoor unit of an air-to-water heat pump
with split technology.
The outdoor unit is connected to the indoor unit via the refri-
gerant circuit.
3.5 Product design
3.5.1 Unit
1
2
1 Air outlet grille 2 Cover for the hydraulic
connections
13
6
5
2
4
1Fan
2Evaporator
3INSTALLERBOARD
PCB
4HMUPCB
5Compressor
6 INVERTER assembly
2
3
1
1Temperaturesensorat
the air inlet
2 Air inlet grille
3 Cover for the electrical
connections
3.5.2 Compressor assembly
8
7
5
3
2
4
1
18
6
10
12
13
11
9
15
17
14
16
1Temperaturesensor
upstream of the com-
pressor
2 Refrigerant separator
3 Maintenance connection
in the high-pressure
area
4Compressor
5Temperaturesensor
downstream of the
compressor
6Pressuresensor
7 Pressure switch
8 4-port diverter valve
9Temperaturesensorat
the evaporator
10 Maintenance connection
in the low-pressure area
11 Refrigerant buffer
12 Electronic expansion
valve

0020257297_07 Installation and maintenance instructions 53
13 Weight
14 Connection for liquid
pipe
15 Connection for hot gas
pipe
16 Silencer
17 Filter/dryer
18 Weight
3.5.3 Isolation valves
1
5
4
3
2
1 Connection for liquid
pipe
2 Isolation valve for liquid
pipe
3 Connection for hot gas
pipe
4 Isolation valve for hot
gas pipe
5 Maintenance connection
with Schrader valve
3.6 Information on the data plate
The data plate is located on the right-hand side of the pro-
duct's exterior.
A second data plate is located inside the product. It becomes
visible when the top casing is removed.
Information Meaning
Serial no. Unique unit identification number
VWL ... Nomenclature
IP Protection class
Compressor
Control
Fan
P max Rated power, maximum
I max Rated current, maximum
IIn-rushcurrent
MPa (bar) Permissible operating pressure
Refrigerant circuit
R410A Refrigerant type
GWP Global Warming Potential
kg Fill quantity
tCO
2CO2equivalent
Information Meaning
Ax/Wxx Air inlet temperature x °C and heat-
ing flow temperature xx °C
COP / Coefficient of performance/heating
mode
EER / Energy efficiency ratio/cooling mode
3.7 CE marking
The CE marking shows that the products comply with the
basic requirements of the applicable directives as stated on
the declaration of conformity.
The declaration of conformity can be viewed at the manufac-
turer's site.
3.8 Connection symbols
Symbol Connection
Refrigerant circuit, liquid pipe
Refrigerant circuit, hot gas pipe
3.9 Application limits
The product works between a minimum and maximum out-
door temperature. These outdoor temperatures define the
application limits for the heating mode, domestic hot water
mode and cooling mode. Operating outside of the application
limits leads to the product switching off.
3.9.1 Heating mode
[-20;20]
[-20;43]
[20;55][-10;55]
[20;20]
A
B
30
35
40
45
50
55
60
25
20
15
10
5
0-20 -15 -10 -5 0 5 10 15 20
A Outdoor temperature B Heating water temperat-
ure

54 Installation and maintenance instructions 0020257297_07
3.9.2 DHW mode
[-20;43]
[35;62]
[-10;55]
[-20;5]
[2;62]
[20;5]
[43;55]
[43;10]
A
B
60
70
50
40
30
20
10
0-20 -10 0 10 20 30 40 50
A Outdoor temperature B Heating water temperat-
ure
3.9.3 Heat output
0,70
0,75
0,80
0,85
0,90
0,95
1,00
0510152025303540
A
B
A Basic length of the
refrigerant pipes in
metres
BPowerfactor
3.9.4 Cooling mode
Validity: Product with cooling mode
[15;7]
[15;25]
[46;7]
[46;25]
A
B
30
25
20
15
10
5
01015202530354045
A Outdoor temperature B Heating water temperat-
ure
3.9.5 Cooling output
Validity: Product with cooling mode
0,70
0,75
0,80
0,85
0,90
0,95
1,00
0510152025303540
A
B
A Basic length of the
refrigerant pipes in
metres
BPowerfactor
3.10 Thawing mode
At outdoor temperatures below 5 °C, condensation on the
fins of the evaporator may freeze and frost may form. This
frost is automatically detected and is automatically thawed at
certain intervals.
The thawing occurs by reversing the refrigeration circuit
while the heat pump is operating. The heat energy that is
required for this is taken from the heating installation.
Correct thawing operation is only possible if the minimum
volume of heating water is circulating in the heating installa-
tion:
Product If the back-
up heater is
activated
If the back-up heater
is deactivated
VWL 35/5 and
VWL 55/5
15 litres 40 litres
VWL 75/5 20 litres 55 litres
VWL 105/5 and
VWL 125/5
45 litres 150 litres
3.11 Safety devices
The product is equipped with technical safety devices. See
"Safety devices" graphic (→Appendix B).
If the refrigerant circuit pressure exceeds the maximum pres-
sure of 4.15 MPa (41.5 bar), the pressure switch switches
the product off. Following a waiting period, another attempt
is made to start it. After three failed start attempts in succes-
sion, a fault message is displayed.
If the product is switched off, the crankcase housing heat-
ing is switched on when the compressor outlet temperat-
ure reaches 7 °C. This prevents possible damage caused
by switching the product back on.
If the compressor inlet temperature and the compressor out-
let temperature are below -15 °C, the compressor does not
start up.
If the temperature measured at the compressor outlet is
higher than the permissible temperature, the compressor
is switched off. The permissible temperature depends on the
evaporation and condensation temperature.

0020257297_07 Installation and maintenance instructions 55
In the indoor unit, the heating circuit's circulation water
volume is monitored. If no flow rate can be detected when
there is a heat demand when the circulation pump is running,
the compressor does not start up.
If the heating water temperature falls below 4 °C, the pro-
duct's frost protection function is automatically activated as
the heating pump is started.
4Set-up
4.1 Unpacking the product
1. Remove the outer packaging parts.
2. Remove the accessory.
3. Remove the documentation.
4. Remove the four screws from the pallet.
4.2 Checking the scope of delivery
▶Check the contents of the packaging units.
Quant-
ity
Designation
1Product
1 Condensate discharge tundish
1 Bag with small parts
1 Enclosed documentation
4.3 Transporting the product
Warning.
Risk of injury from lifting a heavy weight.
Lifting weights that are too heavy may cause
injury to the spine, for example.
▶Note the weight of the product.
▶Have two people lift product VWL 35/5 to
VWL 75/5.
▶Have four people lift product VWL 105/5
and VWL 125/5.
Caution.
Risk of material damage due to incorrect
transportation.
The product must never be tilted at an angle
of more than 45°. Otherwise, this may lead
to faults in the refrigerant circuit during sub-
sequent operation.
▶During transport, do not tilt the product by
any more than the maximum angle of 45°.
1. Use the transport straps or carrying straps or a hand
truck.
2. Protect the casing sections against damage.
4.4 Dimensions
4.4.1 Front view
A
551100
Product A
VWL 35/5 ... 765
VWL 55/5 ... 765
VWL 75/5 ... 965
A
551100
Product A
VWL 105/5 ... 1565
VWL 125/5 ... 1565

56 Installation and maintenance instructions 0020257297_07
4.4.2 Side view, right
107
70
41449
4.4.3 Bottom view
740180 180
477
106
1414
270
4.5 Complying with minimum clearances
▶To guarantee sufficient air flow and to facilitate mainten-
ance work, observe the minimum clearances that are
specified.
▶Ensure that there is sufficient room to install the hydraulic
lines.
Validity: Floor installation OR Flat roof installation
D
B
A
EC
Minimum clear-
ance
Heating mode Heating and cooling
mode
A100mm100mm
B1000mm1000mm
Minimum clear-
ance
Heating mode Heating and cooling
mode
C200 mm 1) 250 mm
D500mm500mm
E600mm600mm
1) 250 mm is recommended for dimension C in order to
guarantee good access during the electrical installation.
Validity: Wall-mounting
D
B
A
EC
F
Minimum clear-
ance
Heating mode Heating and cooling
mode
A100mm100mm
B1000mm1000mm
C200 mm 1) 250 mm
D500mm500mm
E600mm600mm
F300mm300mm
1) 250 mm is recommended for dimension C in order to
guarantee good access during the electrical installation.
4.6 Conditions for the installation type
The product is suitable for these installation types:
–Ground installation
–Wall installation
–Flat-roof installation
The following conditions must be observed for this installa-
tion type:
–Wall-mounting with the unit mounting bracket from the
accessories is not permitted for products VWL 105/5 and
VWL 125/5.
–Flat-roof installation is not suitable for extremely cold or
snowy regions.

0020257297_07 Installation and maintenance instructions 57
4.7 Requirements for the installation site
Danger!
Risk of injury due to ice formation.
The air temperature at the air outlet is below
the outdoor temperature. This can lead to ice
formation.
▶Select a site and an orientation at which
the air outlet is at least 3 m away from
walkways, plastered surfaces and down-
pipes.
▶If the installation site is in the immediate vicinity of the
coastline, ensure that the product is protected against
spraying water by an additional protection device. In do-
ing so, the minimum clearances must be complied with.
▶Observe the permissible height difference between the
outdoor unit and indoor unit.
▶Keep away from flammable substances or flammable
gases.
▶Keep away from heat sources.
▶Avoid using preloaded extract air.
▶Keep away from ventilation openings and extract-air
shafts.
▶Keep away from deciduous trees and shrubs.
▶Do not expose the outdoor unit to dusty air.
▶Do not expose the outdoor unit to corrosive air. Keep
away from animal stalls or stables.
▶Please note that the installation site must be below
2000 m above sea level.
▶Please note the noise emissions. Select an installation
site that is as far away from your own bedroom as pos-
sible.
▶Please note the noise emissions. Select an installation
site that is as far away from the windows of adjacent
building as possible.
Validity: Floor installation
▶Avoid choosing an installation site that is in the corner of
a room, between walls or between fences.
▶Prevent the return intake of air from the air outlet.
▶Ensure that water cannot collect on the subsoil.
▶Ensure that the subsoil can absorb water well.
▶Plan a bed of gravel and rubble for the condensate dis-
charge.
▶Select an installation site which is free from significant
accumulations of snow in winter.
▶Select an installation site at which the air inlet is not af-
fected by strong winds. Position the unit as crosswise to
the main direction of wind as possible.
▶If the installation site is not protected against the wind,
you should plan to set up a protective wall.
▶Please note the noise emissions. Avoid corners of rooms,
recesses or sites between walls.
▶Please note the noise emissions. Select an installation
site with excellent sound absorption thanks to grass,
hedges or fencing.
▶Route the hydraulic lines and electrical wires under-
ground. Provide a safety pipe that leads from the outdoor
unit through the wall of the building.
Validity: Wall-mounting
▶Ensure that the wall fulfils the static requirements. Please
note the weight of the unit mounting bracket (accessory)
and the outdoor unit.
▶Avoid choosing an installation position which is near to a
window.
▶Please note the noise emissions. Maintain sufficient
clearance from reflective building walls.
▶Route the hydraulic lines and electrical wires.
▶Provide a wall duct.
Validity: Flat roof installation
▶Only install the product in buildings with a solid construc-
tion and that have cast concrete ceilings throughout.
▶Do not install the product in buildings with a wooden
structure or with a lightweight roof.
▶Select an installation site that is easily accessible so that
maintenance and service work can be carried out.
▶Select an installation site that is easily accessible so
that foliage or snow can be regularly removed from the
product.
▶Select an installation site that is close to a downpipe.
▶Select an installation site at which the air inlet is not af-
fected by strong winds. Position the unit as crosswise to
the main direction of wind as possible.
▶If the installation site is not protected against the wind,
you should plan to set up a protective wall.
▶Please note the noise emissions. Maintain sufficient
clearance from adjacent buildings.

58 Installation and maintenance instructions 0020257297_07
▶Route the hydraulic lines and electrical wires.
▶Provide a wall duct.
4.8 Creating a foundation
Validity: Floor installation
800
200 540 200
1400
Ø100
270
300100
AB
106
2
3
4
1
▶Dig a hole in the ground. The recommended dimen-
sions can be found in the figure.
▶Insert a downpipe (1).
▶Insert a layer of coarse rubble (3). Calculate the depth
(A) in accordance with local conditions.
–Region with ground frost: Minimum depth: 900 mm
–Region without ground frost: Minimum depth:
600 mm
▶Calculate the height (B) in accordance with local condi-
tions.
▶Create two concrete strip foundations (4).Therecom-
mended dimensions can be found in the figure.
▶Place a gravel bed (2) between and beside the strip
foundations.
4.9 Guaranteeing occupational safety
Validity: Wall-mounting
▶Ensure that the installation position on the wall can be
safely accessed.
▶If the work on the product takes place at a height above
3 m, install technical fall protection.
▶Observe the local laws and regulations.
Validity: Flat roof installation
▶Ensure that the flat roof can be safely accessed.
▶Maintain a safety area of 2 m to the fall edge, plus the
clearance that is required for working on the product. The
safety area must not be entered.
▶Alternatively, install technical fall protection at the fall
edge, for example reliable railings.
▶Alternatively, set up technical safety catch equipment, for
example scaffolding or safety nets.
▶Maintain sufficient clearance to any roof escape hatches
and flat-roof windows.
▶When carrying out the work, use suitable protective
equipment (e.g. barriers) to prevent you from stepping
on or falling through any escape hatches and flat-roof
windows.
4.10 Installing the product
Validity: Floor installation
▶Use the appropriate products from the accessories,
depending on the required installation type.
–Small damping feet
–Large damping feet
–Raised base and small damping feet
▶Align the product horizontally.
Validity: Wall-mounting
▶Check the design and load-bearing capacity of the
wall. Note the weight of the product.
▶Use the unit mounting bracket that is suitable for wall-
mounting from the accessories.
▶Use the small damping feet.
▶Align the product horizontally.
Validity: Flat roof installation
Warning.
Risk of injury due to toppling over in the
wind.
The product may topple over if there is a
wind load.
▶Use two concrete bases and an anti-
slip protective mat.
▶Screw the product to the concrete base.
▶Use the large damping feet.
▶Align the product horizontally.
4.11 Connecting the condensate discharge pipe
Danger!
Risk of injury due to frozen condensate.
Frozen condensate on paths may cause falls.
▶Ensure that condensate does not dis-
charge onto paths and that ice cannot
build up there.
1. For all installation types, ensure that any condensate
that accumulates is discharged frost-free.

0020257297_07 Installation and maintenance instructions 59
1
2
3
4
Validity: Floor installation
Condition: Version without drain pipework
▶Install the supplied condensate discharge tundish (3).
▶Slide the heating wire (1) from inside through the con-
densate discharge tundish and into the downpipe.
▶Adjust the internal heating wire in such a way that the
loop (4) lies concentric to the hole in the floor plate.
▶Ensure that the condensate discharge tundish is posi-
tioned in the centre above the downpipe in the gravel
bed.
Condition: Version with drain pipework
▶Install this design only in regions without ground frost.
▶Install the supplied condensate discharge tundish (3)
and adapter (2).
▶Connect the drain pipework to the adapter.
▶Slide the heating wire (1) from inside through the con-
densate discharge tundish and the adapter and into
the drain pipework.
▶Adjust the internal heating wire in such a way that the
loop (4) lies concentric to the hole in the floor plate.
Validity: Wall-mounting
Condition: Version without drain pipework
▶Install the supplied condensate discharge tundish (3).
▶Slide the heating wire (1) from inside through the con-
densate discharge tundish and to the outside.
▶Slide the end of the heating wire from the outside
through the condensate discharge tundish and back
to the inside until it forms a U-shape within the con-
densate discharge tundish.
▶Adjust the internal heating wire in such a way that the
loop (4) lies concentric to the hole in the floor plate.
▶Use the gravel bed below the product to drain away
the condensate.
Condition: Version with drain pipework
▶Install the supplied condensate discharge tundish (3)
and adapter (2).
▶Connect the drain pipework to the adapter and to a
downpipe. In doing so, ensure that there is a sufficient
downward gradient.
▶Slide the heating wire (1) from inside through the con-
densate discharge tundish and the adapter and into
the drain pipework.
▶Adjust the internal heating wire in such a way that the
loop (4) lies concentric to the hole in the floor plate.
▶If the region is one with ground frost, install electrical
trace heating for the drain pipework.
Validity: Flat roof installation
Condition: Version without drain pipework
▶Install the supplied condensate discharge tundish (3).
▶Slide the heating wire (1) from inside through the con-
densate discharge tundish and to the outside.
▶Adjust the internal heating wire in such a way that the
loop (4) lies concentric to the hole in the floor plate.
▶Use the flat roof to drain away the condensate.
Condition: Version with drain pipework
▶Install the supplied condensate discharge tundish (3)
and adapter (2).
▶Connect the drain pipework to the adapter and to a
downpipe over a short distance. In doing so, ensure
that there is a sufficient downward gradient.
▶Slide the heating wire (1) from inside through the con-
densate discharge tundish and the adapter and into
the drain pipework.
▶Adjust the internal heating wire in such a way that the
loop (4) lies concentric to the hole in the floor plate.
▶If the region is one with ground frost, install electrical
trace heating for the drain pipework.
4.12 Setting up a protective wall
Validity: Floor installation OR Flat roof installation
▶If the installation site is not protected against the wind,
set up a protective wall against the wall.
▶Comply with the minimum clearances.
4.13 Removing/installing the casing sections
The following work must only be carried out when required or
during maintenance work or repair work.

60 Installation and maintenance instructions 0020257297_07
4.13.1 Removing the top casing
A
B
2×1
▶Remove the top casing as shown in the figure.
4.13.2 Removing the right-hand side casing
A
B
2×1
▶Remove the right-hand side casing as shown in the fig-
ure.
4.13.3 Removing the front casing
A
B
2×1
▶Remove the front casing as shown in the illustration.
4.13.4 Removing the air outlet grille
A
C
5×1
B
3×1
▶Remove the air outlet grille as shown in the figure.
4.13.5 Removing the left-hand side casing
B
A
2×1
▶Remove the left-hand side casing as shown in the figure.
4.13.6 Removing the air inlet grille
D
C
3×1
A
2×2
3×1
B
E
2×1
1
2
1. Disconnect the electrical connection to the temperature
sensor (1).
2. Remove the two cross-members (2) as shown in the
figure.
3. Remove the air inlet grille as shown in the figure.