alphainnoTec WZS 42K3M User manual

Brine/water heat pumps
Operating Manual
WZS series
UK
83056600cUK – Translation into English of the original German operating manual

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Contents
1 About this operating manual................................ 3
1.1 Validity...............................................................................3
1.2 Reference documents.............................................3
1.3 Symbolsandidenticationmarkings.............. 3
1.4 Contact.............................................................................4
2 Safety.......................................................................................... 4
2.1 Intended use................................................................. 4
2.2 Personnelqualications.........................................4
2.3 Personal protective equipment.......................... 4
2.4 Residualrisks...............................................................4
2.5 Disposal...........................................................................5
2.6 Avoid damage to property.....................................5
3 Description............................................................................. 6
3.1 Layout ...............................................................................6
3.2 Accessories...................................................................8
3.3 Function...........................................................................8
4 Operation and care.......................................................9
4.1 Energy and environmentally aware
operation .........................................................................9
4.2 Maintenance .................................................................9
5 Delivery, storage,
transport and installation.........................................9
5.1 Scope of supply .......................................................... 9
5.2 Storage.............................................................................9
5.3 Unpackingandtransport .....................................10
5.4 Installation ....................................................................11
6 Installation and connection .................................11
6.1 Dismantle the module box..................................11
6.2 Installing the module box ....................................15
6.3 Install the hydraulic connections.....................15
6.4 Connect the electrical cables............................16
6.5 Installing the control unit......................................17
7 Flushing,llingandventing ..............................18
7.1 Remove the front panel of the module box18
7.2 Heating water quality.............................................18
7.3 Fill,ushandventheatsource........................19
7.4 Vent the circulation pump
of the heat source....................................................19
7.5 Flushandlltheheatinganddomestichot
water charge circuit.................................................20
7.6 Flush,llandventthedomestichotwater
tank...................................................................................20
8 Insulate hydraulic connections........................21
9 Settheoverowvalve..............................................21
10 Commissioning................................................................21
11 Maintenance.......................................................................22
11.1 Basic principles .........................................................22
11.2 Maintenance as required.....................................22
11.3 Yearly maintenance................................................22
11.4 Cleanandushtheevaporatorand
condenser.....................................................................22
12 Faults.........................................................................................23
12.1 Unlockthesafetytemperaturelimiter..........23
13 Dismantling and Disposal.....................................23
13.1 Dismantling..................................................................23
13.2 Disposal and Recycling........................................23
Technical data/Scope of supply........................ 24
Performance curves ......................................... 28
Dimensioned drawings..................................... 33
Installation plans............................................... 35
Hydraulic integration, unit variant H (heating) .. 38
Terminal diagram.............................................. 42
Circuit diagram 1/3 ........................................... 43
EC Declaration of Conformity........................... 51

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
1 About this operating manual
This operating manual is part of the unit.
► Before working on or with the unit read the
operating manual carefully and follow it for all
activities at all times, especially the warnings and
safety instructions.
►Keep the operating manual to hand at the unit and
hand over to the new owner if the unit changes
hands.
►If you have any questions or anything is unclear,
ask the local partner of the manufacturer or the
factory's customer service.
►Note and follow all reference documents.
1.1 Validity
This operating manual refers solely to the unit iden-
tied by the nameplate and unit sticker ( “Rating
plate”onpage6and“Unitsticker”onpage3).
1.2 Reference documents
The following documents contain additional informa-
tion to this operating manual:
●Planning & design manual, hydraulic integration
●Operating manual of the heating and heat pump
controller
●Brief description of the heat pump controller
●Operating manual of the expansion board
● Logbook, if included with this unit by the
manufacturer
Unitsticker
The unit sticker contains important information for
contact with the manufacturer or the local partner of
the manufacturer.
► Stickon the unit sticker (barcode with serial and
product number) here.
1.3 Symbolsandidentication
markings
Identicationofwarnings
Symbol Meaning
Safety-relevant information. Warn-
ing of physical injuries.
DANGER Indicates imminent danger resulting
in severe injuries or death.
WARNING Indicates a potentially dangerous
situation, which can result in severe
injuries or death.
CAUTION Indicates a potentially dangerous
situation, which can result in moder-
ate or minor injuries.
ATTENTION Indicates a potentially dangerous
situation, which can result in prop-
erty damage.
Symbols in the document
Symbol Meaning
Information for the professional
Information for the owner/operator
Requirement for an action
Single step action prompt
1., 2., 3. ... Numbered step within a multi-step
action prompt. Keep to the given
order.
Additional information, e.g. note on
easier work, information on stand-
ards
 Reference to further information
elsewhere in the operating manual
or in another document

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
1.4 Contact
Addresses for purchasing accessories, for service
cases or for answers to questions about the unit and
this operating manual can be found on the internet at
anytimeandiskeptuptodate:
●Germany: www.alpha-innotec.de
●EU: www.alpha-innotec.eu
2 Safety
Only use the unit if it is in proper technical condition
and only use it as intended, safely and aware of the
hazards, and follow this operating manual.
2.1 Intended use
The unit is solely intended for the following functions:
●Heating
●Domestic water heating
●Cooling (optional, with accessories or unit type
...K3M)
►Proper use includes complying with the operating
conditions ( “Technical data/Scope of supply”
on page 24) and the operating manual and
noting and following the reference documents.
►When using the local regulations note: laws,
standards, guidelines, directives.
All other uses of the unit are not as intended.
2.2 Personnelqualications
All instructional information in this operating manual is
solelydirectedatqualied,skilledpersonnel.
Only qualied, skilled personnel is able to carry out
theworkontheunitsafetyandcorrectly.Interference
by unqualied personnel can cause life-threatening
injuries and damage to property.
►Ensure that the personnel is familiar with the local
regulations, especially those on safe and haz-
ard-awareworking.
► Only allow qualied personnel with “electrical”
training to carry out work on the electrics and
electronics.
► Onlyallowskilledpersonneltodoanyotherwork
on the system, e.g.
–Heating installer
–Plumbing installer
–Refrigeration system installer (maintenance
work)
During the warranty and guarantee period, service
workandrepairsmayonlybecarriedoutbypersonnel
authorised by the manufacturer.
2.3 Personal protective equipment
Thereisariskofcuttingyourhandsonsharpedgesof
the unit.
►Wear cut-resistant protective gloves during
transport.
2.4 Residualrisks
Electricshock
Components in the unit are live with life-threatening
voltage. Before opening the unit panelling:
►Disconnect unit from power supply.
► Protectunitagainstbeingswitchedbackonagain.
Injuryduetoammableliquidsand
potentially explosive atmospheres
Constituents of antifreeze mixtures, e.g. ethanol,
methanol,arehighlyammableandformanexplosive
atmosphere:
►mix antifreeze in well-ventilated rooms.
► Note the hazardous substance markings and
comply with the relevant safety regulations.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Injuries and environmental damage due to
refrigerant
The unit contains harmful and environmentally danger-
ousrefrigerant.Ifrefrigerantleaksfromtheunit:
1. Switch off unit.
2. Thoroughly ventilate installation room.
3. Notify authorised customer service.
2.5 Disposal
Batteries
Improper disposal of the buffer battery damages the
environment.
►Dispose of the buffer battery in an environmentally
compatible way according to the local regulations.
Media harmful to the environment
Improper disposal of environmentally harmful media
(antifreeze, refrigerant) damages the environment:
►Collect media safely.
►Dispose of the media in an environmentally com-
patible way according to the local regulations.
2.6 Avoid damage to property
Improper action
Requirements for minimum scale and corrosion dam-
age in hot water heating systems:
●Proper planning, design and start-up
●Closed system with regard to corrosion
●Integration of adequately dimensioned pressure
generation
●Use of deionised heating water (VE water) or VDI
2035 water
●Regular servicing and maintenance
If a system is not planned, designed, started up and
operated according to the named requirements, there
isariskthatthefollowingdamageandfaultswilloccur:
●Malfunctions and the failure of components, e.g.
pumps, valves
●Internal and external leaks, e.g. from heat
exchangers
●Cross-section reduction and blockages in compo-
nents, e.g. heat exchanger, pipes, pumps
●Material fatigue
●Gas bubbles and gas cushion formation
(cavitation)
●Negative effect on heat transfer, e.g. formation of
coatings, deposits, and associated noises, e.g.
boiling noises, ow noises
►Note and follow the information in this operating
manualforallworkonandwiththeunit.
Unsuitablequalityofthellandmake-up
water in the heating circuit
The efciency of the system and the life of the heat
generator and the heating components depend deci-
sively on the quality of the heating water.
If the system is lled with untreated domestic water,
calcium precipitates as scale. Limescale deposits form
ontheheattransfersurfacesoftheheating.Theef-
ciency drops and energy costs rise. In extreme cases
the heat exchangers are damaged.
►Fill system with deionised heating water (VE
water) or VDI 2035 water only.
Unsuitable quality of the water in the domes-
tichotwatertank
►Ensure that the electrical conductivity of the
domesticwaterisatleast100μS/cm.
Unsuitable quality of the water or the
water-antifreeze mixture in the heat source
►Use of pure water in a at-plate collector or a borehole
heat exchanger (vertical collector) is not permitted
►For operation of the heat source with water-
antifreeze mixture, ensure that the water fulls the
quality specications of the heating water side

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
3 Description
3.1 Layout
NOTE
This section essentially names the
components relevant for fullling the tasks
described in this operating manual.
Heat station
1 3-way changeover valve, heating
circuit/domestic hot water
2 Valve motor
3 Venter
4 Position of rating plate
5 Overowvalve
6 Electrical switch cabinet
7 Domestichotwatertanksensor
8 Module box
9 Height-adjustable foot (4x)
10 Domestichotwatertank
11 Heating circuit/hot water circulation pump
12 Manual output control heating
element (MLRH), accessories
13 Heating element
Rating plate
One rating plate is attached at the top of the heating
station, a second one on the left on the module box.
The rating plate contains the following information at
the top:
●Unit type, product number
●Serial number, unit index
The rating plate also contains an overview of the most
important technical data.
1
8
9
3 4 5
7
6
2
12
13
11
10

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Module box, variant without cooling
6
5
7
8
1
3
4
2
1 Compressor
2 Condenser
3 Vibration isolator (4x)
4 Lifting lug (4x)
5 Evaporator
6 Heat source circulation pump
7 Heatsourcellinganddraintap
8 Heatingllinganddraintap
Module box, variant with cooling
6
5
7
9 8
1
2
3
4
1 Compressor
2 Condenser
3 Vibration isolator (4x)
4 Lifting lug (4x)
5 Evaporator
6 Heat source circulation pump
7 Heatsourcellinganddraintap
8 Heatsourcellinganddraintap
9 Heatingllinganddraintap

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Control unit
3
1 2
1 Control unit
2 PushupapupstreamofUSBconnection
(forqualiedpersonnelforsoftware
updates and for data logging)
3 Wall-mountedbracket(onlynecessary
for wall-mounted installation)
Underside of control unit
13 42
1 RBE (RS 485)
2 Networkcableconnection
3 LIN bus cable connection to the heat pump
4 not used
3.2 Accessories
The following accessories are available for the unit
through the manufacturer's local partner:
●Additional cover for the front cover panel, if the
control unit is mounted on the wall
●Room thermostat for switching the cooling function
(if available)
●Dew point monitor for protecting a system with
cooling function at low ow temperatures
●Expansion board for automatic changeover
between heating and cooling mode
●Manual output control heating element (MLRH) for
limiting the output of the electric heating element
●“Cooling package” for retrotting type H units with
a cooling function
3.3 Function
Liquid refrigerant is evaporated (evaporator), the
energy for this process is environmental heat and
comes from the “ground” heat source (collector,
borehole heat exchanger or groundwater via
intermediate exchanger). The gaseous refrigerant is
compressed (compressor), this causes the pressure
to rise and therefore the temperature too. The
gaseousrefrigerant withhightemperatureisliqueed
(condenser).
Here the high temperature is discharged to the heating
water and is used in the heating circuit. The liquid
refrigerant with high pressure and high temperature
is expanded (expansion valve). The pressure and
temperature drop and the process begins again.
Due to the integrated changeover valve and the
integrated energy efciency circulation pump the
heated heating water can be used for charging the
domestic hot water or for heating the building. The
temperatures required and use are controlled by the
heat pump controller. Reheating, drying out screed or
increasing the domestic hot water temperature can
be carried out using the integrated electric heating
element, which is activated by the heat pump controller
as and when necessary.
An integrated overow valve ensures that the heat
pump does not switch to high-pressure fault if all
heating circuits are closed. The integrated vibration
isolators for the heating circuit and heat source prevent
structure-borne sound and vibrations from being
transferredontothexedpipesandthereforeintothe
building.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Cooling
Cooling is integrated in type K units. Type H units can
beretrottedwiththe“Coolingpackage”accessories.
The following options are possible for units with
cooling function ( operating manual of the heating
and heat pump controller):
●Passive cooling (without compressor)
●Control of the cooling function via the heating and
heat pump controller
●Switching between heating and cooling mode;
automatically with expansion board (accessories)
Networkconnectiononthecontrolunit
The control unit can be connected to a computer or
network via a network cable. The heating and heat
pump controller can then be controlled from the
computerorfromthenetwork.
4 Operation and care
NOTE
The unit is operated via the control unit
of the heating and heat pump controller
(operating manual of the heating and heat
pump controller).
4.1 Energy and environmentally
aware operation
The generally accepted requirements for energy-
aware and environmentally-aware operation of a
heating system also apply to use of a brine/water heat
pump. The most important measures include:
●No unnecessarily high ow temperature
●No unnecessarily high domestic hot water
temperature (note and follow local regulations)
●Do not open windows with gap /tilt open
(continuous ventilation), but instead open wide for
a short time (purge ventilation).
4.2 Maintenance
Wipe down the outside of the unit only using a damp
cloth or cloth with mild cleaning product (washing-up
liquid, neutral cleaning product). Do not use any harsh,
abrasive, acid or chlorine-based cleaning products.
5 Delivery, storage,
transport and installation
5.1 Scope of supply
NOTE
On delivery the accessories are enclosed in
twopackagesontheheatingstation.
► Check delivery immediately after receipt for
outwardly visible damage and completeness.
►Notify supplier of any defects immediately.
Theseparatepackincludedcontains:
● Sticker with the unit number for attaching to page
3 of this manual
●Control unit consisting of wall bracket, cover,
control with rear bracket
●6-mm anchors with screws (2x each) for wall-
mounting the control unit
●Safety valve, outdoor sensor
●Compression ttings
●Replacement material after dismantling the
module box: Insulation hoses (2x), cable ties (4x),
O-rings (6x)
5.2 Storage
► Where possible do not unpack the unit until
directly before installation.
►Store unit protected against:
–Moisture/damp
–Frost
–Dust and dirt

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
5.3 Unpackingandtransport
Notes on safe transport
The heating station and the module box are heavy
( “Technical data/Scope of supply” on page 24).
Thereisariskofinjuriesordamagetopropertyifthe
heating station falls or overturns or if the module box
falls.
►The heating station and module box must be
transported and installed by several persons.
►Secure the heating station during transport. Carry
the module box by the carrying lugs.
Thereisariskofcuttingyourhandsonsharpedgesof
the unit.
►Wear cut resistant protective gloves.
The hydraulic connections are not designed for
mechanical loads.
►Do not lift or transport the unit by the hydraulic
connections.
If the module box is tilted by more than 45°, compressor
oil runs into the cooling circuit.
►Do not tilt the unit with installed module box by
more than 45°.
Transport the unit preferably with a pallet truck,
alternatively with a handcart.
Transportwithapallettruck
►Transport the unit to the place of installation
packagedandsecuredonawoodenpallet.
Unpacking
NOTE
Iftheunitisnottransportedbyapallettruck:
Do not lift off the pallet until after unpacking
and dismantling the housing panels.
1. Remove plastic lms. Ensure that you do not
damage the unit.
2. Dispose of the mounting bracket, transport and
packagingmaterialinanenvironmentallyfriendly
way according to local regulations.
3. Remove the lm from the plastic element of the
front panel in the place of installation.
Dismantle housing panels for transport with
handcart or carrying the unit
Unitisunpacked( “Unpacking”onpage10).
1. To avoid damage to the housing panels:
–Undo 2 screws at the bottom of the front panel.
–Lift up the front panel and put down in safe
place.
–Undo 3 screws in each side panel.
–Lift up side panels and put down in safe place.
8x
1.
2.
3.
Transport with a handcart
NOTE
●If transporting with a handcart the module
box must be pushed in.
● Thisgurewiththehandcartshowstrans-
porting the unit on its left-hand side; it can
also be transported on its right-hand side.
Housing panels are dismantled.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
1. To avoid damage: On a handcart, load the unit on
its side only.
2. Transport unit on the handcart.
Carrying the unit
Housing panels are dismantled.
1. Dismantle module box and carry it by the support
lugs to the place of installation.
2. Carry the unit horizontally wherever possible.
5.4 Installation
Installation room and space requirements
NOTE
Note and follow the local regulations and
standards regarding the installation room and
space requirements. The table shows the
regulations to EN 378-1 relevant in Germany.
Refrigerant Limit value [kg/m³]
R 134a 0.25
R 404A 0.48
R 407C 0.31
R 410A 0.44
( “Technical data/Scope of supply” on page 24).
Minimum room volume = Refrigerantcapacity[kg]
Limitvalue[kg/m³]
NOTE
If several heat pumps of the same type are
installed only one heat pump need to be
taken into account. If several heat pumps
of different types are installed, only the heat
pump with the largest refrigerant volume
needstobetakenintoaccount.
Minimum volume corresponds to the requirements
for the refrigerant used.
Installation inside the building only.
Installation room is dry and frost-free.
Clearance dimensions are met ( “Installation
plans” on page 36).
Thesurface/oorissuitable forinstallation ofthe
unit:
–level and horizontal
–load-bearing capacity for the unit's weight
Aligning the unit
►Align the unit horizontally and stably in the
installation site using the height-adjustable feet
and a spanner size SW 13. Adjustment range:
25 to 50 mm.
6 Installation and connection
6.1 Dismantle the module box
ATTENTION
If the module box is tilted by more than 45°,
compressor oil runs into the cooling circuit.
►Do not tilt the module box by more than 45°.
NOTE
●If necessary the module box can be
dismantled for easier transport of the unit
or for service reasons.
●Steps 1 to 5 are only required if the module
boxisconnectedandlled.
Unit is safely disconnected from the power supply
and protected against being switched back on
again.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
1. Remove the front panel of the module box
( “7.1 Remove the front panel of the module
box” on page 18).
2. Close shut-off valves to the heating circuit.
3. Drain the unit via the lling and drain tap of the
heating.
►Unit without cooling:
►Unit with cooling:
4. Use a spanner to close the shut-off valves of the
heat source (behind the covers).

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
5. Drain the unit via the lling and drain tap of the
heat source.
►Unit without cooling:
►Unit with cooling:
6. Disconnect the electrical connections.
–Disconnect 2 white connectors (1) at the
bottom of the electrical control cabinet. To do
this, release the latching lugs by pressing on
the sides of the connectors.
–Pullouttheblackrectangularconnector(2)at
the top of the module box.
1
2
7. Remove the insulation on the hydraulic
connections.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
8. Remove 3 clips on the hydraulic connections.
9. Use spanner size SW 52 to unscrew the heating
ow.
10. Disconnect the hydraulic connections; to do this,
push the pipes downwards as far as necessary.
11. Remove the 2 side retaining screws.
12. Toprotecttheoorandmovethemodulebox(3)
more easily: place boards (4) under it, e.g. from
thepackagingmaterial.
13. Liftandholdnut(1)ontheheatingow.
14. Slowly and carefully pull out the module box by
the retaining loops (2). Ensure that none of the
pipes are damaged
2
3
4
1
1.
2.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
15. Pull out the module box completely and place it on
the boards.
6.2 Installing the module box
1. Place the module box carefully in the bottom in the
heating station and slowly and carefully push it in.
–At the same time, lift and hold the nut on the
heatingow.
–Ensure that none of the pipes are damaged.
2. Attach the two side retaining screws.
3. Connect the heating ow and hydraulic
connections. At the same time, replace O-rings
on the heat pump connections (separatepack
included).
4. Perform pressure test and insulate pipes with the
enclosed insulation hoses (separatepack).
5. Connect the electrical connections.
–Plug in 2 white connectors at the bottom of
the electrical control cabinet. Ensure that the
connectors move easily and the lugs latch into
position.
–Plugintheblackrectangularconnectoratthe
top of the module box.
6.3 Install the hydraulic connections
ATTENTION
Damage to the copper pipes due to unacceptable
loading!
►Secure all connections against twisting.
NOTE
The heat source can be connected from the
top, right or left.
The heat source system has been installed in
accordance with the specications (planning
& design manual, dimensioned diagrams,
installation plans).
Cross-sections and lengths of the pipes for the
heating circuit and heat source are dimensioned
adequately.
The free pressure of the circulation pumps
produces at least the minimum throughput
required for the unit type ( “Technical data/
Scope of supply” on page 24).
The cables for the heat source and the heating
arexedtothewallorceilingviaaxedpoint.
Installthecompressionttingsandball
valves
ATTENTION
Leaks or fracture of the union nut due to excessive
force!
►Tighten the union nut only as far as described
here.
1. Check pipe ends for scratches, dirt and
deformation.
2. Checkproperpositionoftheclampingringonthe
tting.
3. Push the pipe through the clamping ring up to the
limitstopinthetting.
4. Tighten the union nut hand-tight and attach
waterproofmarking.
5. Tighten union nut with 3/4 rotation.
6. Checkconnectionforleaks.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Iftheconnectionleaks:
1. Undoconnectionandcheckpipefordamage.
2. Tighten the union nut hand-tight and retighten with
the open-ended spanner with 1/8 to 1/4 turn, as
the clamping ring is already in a clamping position.
Connect the unit to the heat source,
domestic water pipes and heating circuit
1. Install shut-off devices in the heating circuit.
2. Insert the vent at the highest point of the heat
source and the heating circuit.
3. Recommendation: Fit a dirt lter with mesh size
0.9 mm onto the heat source inlet.
4. Connectthedomestichotwatertankaccordingto
the local regulations.
5. Recommendation: To balance out pressure
uctuations and water hammers and avoid
unnecessary loss of water, install an expansion
vesselwiththrough-owtting.
6. Ensure that the operating overpressures
(“Technical data/Scope of supply” on page
24) are not exceeded. Install pressure reducer
if necessary.
6.4 Connect the electrical cables
ATTENTION
Irreparable damage to the compressor due to wrong
rotatingeld!
► Ensurethatthereis a clockwise rotatingeldfor
the compressor load infeed.
Basic information on the electrical connection
NOTE
Ensure that the unit is supplied with electricity
atalltimes.Afterworkinginsidetheunitand
attaching the unit panelling, switch the power
supplybackonimmediately.
●The specications of the local power supply
company may apply to electrical connections.
●Fit the power supply for the heat pump with an all-
pole miniature circuit-breaker with at least 3 mm
contact spacing (IEC 60947-2).
●Note the level of the tripping current
( “Technical data/Scope of supply” on page
24).
●Comply with the electromagnetic compatibility
regulations (EMC regulations).
–Lay the control/sensor cables and unit supply
cablesufcientlyfarapart(>100mm).
–Lay unshielded power supply cables and
shieldedcables(LINbuscable)withsufcient
distance between them.
●Do not lengthen the patch cable and LIN bus
cable. LIN bus cables up to 30 m long can be
used.
Pullinthecablesandconductorsandmake
the connections
1. Strip the sheathing of electrical cables before
laying in the cable duct of the control box.
2. Open electrical switchbox:
–Undo 2 screws at the top of the cover panel of
the electrical control box.
–Unhookcoverpanel.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
3. Lay the control / sensor cables and unit supply
cable and connect:
–Route cables through the reserve conduits (1)
and (2) only, from above into the inside of the
unit.
–Route cables from underneath through the
cable openings in the control box (3).
2
1
3
–Connect cables to the respective terminals
(“Terminal diagram” on page 43).
Control the controller via a PC
1. During installation lay a shielded network cable
(category 6) through the unit.
2. Plug the RJ-45 connector of the network cable
into the bush of the control unit (1).
1
NOTE
The network cable can be retrotted at any
time.Todothis,dismantlethemaskingplate.
6.5 Installing the control unit
NOTE
The control unit can be inserted in a recess in
the front panel of the unit or can be installed
on the wall.
Insert the control unit in the unit and connect
1. If required: Remove masking plate from the
slot provided. To do this, press the latching lugs
together and push out of the openings.
2. Removelmfromtheplasticelementofthefront
panel.
3. Position the control unit in the recess in the front
panel of the unit and press the latching lugs into
the openings.
4. Cut the cable to length generously so that the
front panel can be removed and placed to the side
of the unit. Do not cut the cable ties for strain relief
of the LIN bus cable at the electric control box.
–LINbuscableapprox.1.1mfromthexingof
the strain relief at the electrical control box
–All other cables approx. 1.2 m
5. UsecabletiestoxtheLINbuscabletoawebof
the cover around 20 cm in front of the connector
(strain relief).
6. Push the cable through the opening in the front
panel of the unit from below and into the control
unit.
7. Insert cover in the free slot.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Mount the control unit on the wall and
connect
1. Releasetherearbracketfromthecontrolunit.
2. Cut off latching lugs (if visually obtrusive).
3. Mark 2 drillholes (“Dimensioned drawing of
controlunit,wall-mountedbracket”onpage34).
4. Fix the wall-mounted bracket (2) with
2 wallplugs (1) and 2 screws (3).
1
23
1.
2.
3.
4.
5. Feed in the cables from the wall (e.g. in-wall box)
or from below.
6. Push the control unit onto the wall-mounted
bracket.
7. Route the LIN bus cable from the top right-hand
side at the rear from the heat pump and plug into
the control unit at the bottom.
8. Push on cover. If applicable, position second
cover (accessories) on the second unused slot.
7 Flushing,llingandventing
7.1 Remove the front panel of the
module box
►Unscrew the front panel of the module box.
7.2 Heating water quality
NOTE
●For detailed information refer, among
other things, to the VDI Guidelines
2035 “Vermeidung von Schäden in
Warmwasserheizanlagen” (preventing
damage in hot water heating systems).
●Required pH value: 8.2 ... 10
●for aluminium materials: pH value:
8.2 ... 8.5
►Fill the system with deionised heating water (VE
water) only or VDI 2035 (low-salt operation of the
system).

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Advantages of low-salt operation:
●Low corrosion-promoting properties
●No formation of mineral scale
●Ideal for closed heating circuits
●ideal pH value due to self-alkalinisation after lling
the system
●If necessary, simple alkalinisation to pH value 8.2
by adding chemicals
7.3 Fill,ushandventheatsource
Water and the following antifreeze products are
approvedforllingthebrinecircuit:
●Monopropylene glycol
●Monoethylene glycol
●Ethanol
●Methanol
►For operation of the heat source with water or
water-antifreeze mixture, ensure that the water
fulls the quality specications of the heating
water side.
► Checkthatfrostprotectionto–13°Cisensured.
►Ensure that the antifreeze is compatible with the
pipe, seal and other component materials used on
site.
Drain pipe of the safety valve is connected.
Room is ventilated.
1. Flush heat source system.
2. Mix antifreeze with water thoroughly with the
required ratio, before adding to the heat source.
3. Check the concentration of the water-antifreeze
mixture. Frost protection: –13 °C
4. Fill the heat source with the water-antifreeze
mixture.
5. Flush until the system is air-free.
7.4 Vent the circulation pump
of the heat source
NOTE
The diagram shows the unit variant with
cooling. In the unit variant without cooling the
circulation pump is located in the same place.
1. Place vessel for collecting discharging liquid
under the outlet.
2. Undo screw-on cap in the middle of the circulation
pump.
3. Wait until liquid is discharged uniformly.
4. Screwthecapbackontightly.
5. Unscrew the front panel of the module box.
6. Dispose of collected liquid according to the local
regulations.
7. Set system pressure to 1 bar.

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Subject to change without notice | 83056600cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
7.5 Flushandlltheheatingand
domestic hot water charge circuit
Drain pipe of the safety valve is connected.
►Ensure that the set pressure of the safety valve is
not exceeded.
1. Pull the U-clip(2) off the oor of the valve
motor (1).
2. Pull the valve motor carefully upwards and off the
3-way changeover valve (3).
1.
2.
1
2
3
3. Turn the spindle of the 3-way changeover valve so
that the rounded side of the spindle points in the
direction of marking A of the connections of the
3-way changeover valve.
AB
4. Flush the domestic hot water charge circuit for
approx. 1 minute.
5. Turn the spindle so that the rounded side of the
spindlepointsinthedirectionofmarkingBofthe
connections of the 3-way changeover valve.
6. Flush heating circuit thoroughly, until no more air
is discharged.
7. Position the valve motor (1) on the 3-way
changeover valve (3).
8. Insert the U-clip(2) into the oor of the valve
motor.
1
3
2.
1.
2
9. Ensure that the U-clip has latched into position
correctly:
–Valve motor sits securely on the 3-way
changeover valve.
–Both prongs of the U-clip sit on the lug.
–The tips of the U-clip are visible by approx.
2mm(notsignicantlymore!).
7.6 Flush,llandventthedomestic
hotwatertank
Drain pipe of the safety valve is connected.
►Ensure that the set pressure of the safety valve is
not exceeded.
1. Open the domestic water inlet valve at the
domestichotwatertank.
2. Open taps for domestic hot water.
3. Flush the domestic hot water tank until no more
air discharges from the valves at the taps.
4. Close taps for domestic hot water.