alphainnoTec Paros 4 User manual

UK
83071000aUK
Air/Water Heat Pumps
Indoor installation
Operating Manual
Paros 4

2Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
Table of contents
1 About this operating manual ...................... 3
1.1 Validity....................................................... 3
1.2 Reference documents............................... 3
1.3 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 Delivery condition ..................................... 6
3.2 Layout ....................................................... 7
3.3 Accessories............................................... 7
3.4 Function .................................................... 8
4 Operation and care....................................... 8
4.1 Energy-conscious and environmentally-
aware operation ........................................ 8
4.2 Care .......................................................... 8
5 Delivery, storage, transport and
installation ....................................................... 9
5.1 Scope of supply ........................................ 9
5.2 Storage...................................................... 9
5.3 Transport and unpacking .......................... 9
5.4 Installation............................................... 10
5.5 Installation of air ducting ..........................11
6 Installing the hydraulic connections ........11
7 Electrical installation................................... 13
8 Flushing,llingandventing ...................... 17
8.1 Heating water quality .............................. 17
8.2 Flush,llandventtheheatingcircuit...... 18
9 Insulate hydraulic connections ................ 19
10 Overowvalve ............................................. 19
11 Commissioning ............................................ 20
12 Maintenance................................................. 21
12.1 Basic principles....................................... 21
12.2 Maintenance as required ........................ 21
12.3 Cleanandushcondenser ..................... 21
12.4 Yearly maintenance................................. 21
13 Faults.............................................................. 22
14 Dismantling and disposal.......................... 22
14.1 Disposal and recycling............................ 22
Technical data / Scope of supply................... 24
Performance curves.......................................... 25
Dimensonal drawings........................................ 27
Installation plans................................................. 28
Coastal installation............................................. 36
Hydraulic integration.......................................... 37
Paros 4 with hydraulic station HSV 4................ 37
Paros 4 with hydraulic module HV 4 and
bu󰀨ertankinseries................................. 38
Paros 4 with wall-mounted controller WR 4
and separation tank ................................ 39
Keys hydraulic integration ................................ 40
Circuit diagrams.................................................. 42

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Subject to technical amendments without prior notice | 83071000aUK | 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identied
by the nameplate ( “Nameplates”, page 7).
1.2 Reference documents
The following documents contain additional
information to this operating manual:
●Planning & design manual, hydraulic integration
● Installationmanualoftheexibleairductsystem
ADH
●Operating manual of the hydraulic unit or the wall-
mounted controller
●Operating manual of the heating and heat pump
controller
●Brief description of the heat pump controller
● Operating manual of the expansion board
(accessories)
●Log book
Symbols and markings
Identicationofwarnings
Symbol Meaning
Safety-relevant information.
Warning of physical injuries.
Safety-relevant information.
Warning of physical injuries.
Flammable materials.
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
moderate or minor injuries.
IMPORTANT Indicates a potentially dangerous
situation, which can result in
property damage.
Symbols in the document
Symbol Meaning
Informationforqualiedpersonnel
Information for the owner/operator
Requirement for action
Procedural instructions:
Single step action prompt
1., 2., 3., …Procedural instructions:
Numbered step within a multi-step
action prompt. Keep to the given
order.
Additional information, e.g. a tip on
making work easier, information on
standards
Reference to further information
elsewhere in the operating manual
or in another document
●Listing
Secure connections against twisting

4Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
1.3 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 and
are kept up-to-date:
●Germany: www.alpha-innotec.de
●EU: www.alpha-innotec.com
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 designed for household use and is solely
intended for the following purposes:
●Heating
●Domestic hot water preparation (optional, with
accessories)
●Cooling
►Proper use includes complying with the operating
conditions ( “Technical data / Scope of supply”,
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
The operating manuals supplied with the product are
intended for all users of the product.
The operation of the product via the heating and heat
pump control and work on the product which is intend-
ed for end customers / operators is suitable for all age
groups of persons who are able to understand the ac-
tivities and the resulting consequences and can carry
out the necessary activities.
Childrenandadults who arenot experiencedin han-
dling the product and do not understand the neces-
sary activities and the resulting consequences must
be instructed and, if necessary, supervised by persons
experiencedin handlingtheproduct and whoarere-
sponsible for safety.
Children must not play with the product.
Theproductmayonlybeopenedbyqualiedpersonnel.
All procedural instructions in this operating manual are
solelydirectedatqualiedspecialist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 hazard-
aware working.
► Ensurethatthepersonnelarequaliedtohandle
ammable(primary)refrigerant.
►Work on the refrigerating circuit may only be car-
ried out by qualied personnel with appropriate
qualicationsforrefrigerationsysteminstallation.
► Allowqualiedpersonnelwith“electrical”training
only to carry out work on the electrics and
electronics.
► Allow qualied, skilled personnel only to do any
other work on the system, e.g.
●Heating installer
●Plumbing installer
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
During transport and work on the unit, there is a risk of
cuts due to the sharp edges of the unit.
►Wear cut-resistant protective gloves.
During transport and work on the unit, there is a risk of
foot injuries.
►Wear safety shoes.
When working on liquid-conveying lines, there is a risk
of injury to the eyes due to leakage of liquids.
►Wear safety goggles.
2.4 Residual risks
Electric shock
Components in the unit are live with life-threatening
voltage. Before working on the unit:
►Disconnect unit from power supply.
►Protect unit against being switched back on again.
►Residual voltage at the inverter. Wait 5 minutes
before opening the device.

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Existing earthing connections within housings or on
mounting plates must not be altered. If this should nev-
ertheless be necessary in the course of repair or as-
sembly work:
►Restore earthing connections to their original con-
dition after completion of the work.
Injuries caused by moving parts
►Only switch on the unit once outer panels and the
exibleairductsystemADHhavebeentted.
Injuries caused by high temperatures
►Before working on the unit, let it cool down.
Injuries and environmental damage due to
refrigerant
WARNING
The unit contains ammable (primary)
refrigerant that is hazardous to health and
the environment. If (primary) refrigerant
leaks from the unit, there is a risk of an
explosion:
1. Switcho󰀨unit.
2. Keep the unit away from ignition sources.
3. Thoroughly ventilate installation area.
4. Notify authorised after sales service.
Safety labels
►Observe safety labels on and in the unit.
2.5 Disposal
Environmentally harmful media
Improper disposal of environmentally harmful media
((primary) refrigerant) damages the environment:
►Collect media safely.
►Dispose of the media in an environmentally-friend-
ly manner according to the local regulations.
2.6 Avoid damage to property
The ambient air at the heat pump installation site, as
well as the air drawn in as a heat source, must not
contain any corrosive constituents!
Constituents such as
●Ammonia
●Sulphur
●Chlorine
●Salt
● Sewergasses,uegasses
can cause damage to the heat pump, which could lead
to the complete failure / destruction of the heat pump!
Decommissioning/emptying heating
If the system / heat pump is decommissioned or
emptied,afterithasbeenlledalready,itisnecessary
toensurethatthecondenserandanyheatexchangers
present have been completely emptied in the event
of frost. Residual water in heat exchangers and
condensers can result in damage to components.
►Empty system and condenser completely, open
vent valves.
►Blast out with compressed air if necessary.
Improper action
Requirements for minimum scale and corrosion
damage in hot water heating systems:
●Proper planning, design and commissioning
●Closed system with regard to corrosion
●Integration of an adequately dimensioned
pressure maintaining device
●Use of demineralised heating water (VE water) or
water corresponding to the VDI 2035 norm
●Regular servicing and maintenance
If a system is not planned, designed, started up and
operated in accordance with the given 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

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●Cross-section reduction and blockages in
components,e.g.heatexchanger,pipes,pumps
●Material fatigue
●Gas bubbles and gas cushion formation
(cavitation)
● Negativee󰀨ect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 e󰀩ciency of the system and the life of the heat
generator and the heating components depend
decisively on the quality of the heating water.
If the system is lled with untreated drinking water,
calcium precipitates as scale. Limescale deposits
form on the heat transfer surfaces of the heating. The
e󰀩ciency drops and energy costs rise. In extreme
casestheheatexchangersaredamaged.
►Fill the system with deionised heating water
(VE water) or with water corresponding to the VDI
2035 norm only (low-salt operation of the system).
3 Description
3.1 Delivery condition
2
1
1 Accompanying parts package
2 Heat pump

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3.2 Layout
NOTE
This section essentially names the
components relevant for fullling the tasks
described in this operating manual.
4
5
7
3
11
6
9
10
2
8
1
1 Evaporator
2 Condensate pan
3 Modulebox
4 Condenser
5 Inverter unit
6 Filter dryer
7 Expansionvalve(cooling,defrost)
8 Compressor (in the insulated housing)
9 Expansionvalve(heating)
10Electricalswitchbox
11 Fan
Nameplates
One nameplate is attached to the outside of the unit on
a side facade at the factory, a second one ist attached to
themoduleboxinsideoftheunit.
Another nameplate is included in the scope of delivery.
►Glue this nameplate into the logbook fpr heat
pumps.
The nameplates contain the following information at
the very top:
●Model, item number
●Serial number
The nameplates also contain an overview of the most
important technical data.
3.3 Accessories
Functionally necessary accessories
Only use genuine accessories made by the manufac-
turer of the device.
● Flexibleairductsystem ADH
●Wall-mounted controller WR 4
or
●Hydraulic module HV 4
or
●Hydraulic station HSV 4
Additional accessories
The following accessories are available for the unit
through the manufacturer's local partner:
●Electrical connection kit EVS or EVS 8
●Air / magnetic sludge separator
●Domestic hot water tank
●Bu󰀨ertank
●3-way switching valve with valve motor
●Overflow valve
●Room thermostat to switch the cooling function
●Dew point monitor to protect a system with cooling
functionatlowowtemperatures
●Room control unit to control the main functions
from the living room

8Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
4 Operation and care
NOTE
The unit is operated via the control panel
of the heating and heat pump controller
( operating manual of the heating and
heat pump controller).
4.1 Energy-conscious and
environmentally-aware operation
The generally accepted requirements for an energy-
conscious and environmentally-aware operation of a
heating system also apply when using a 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 (shock ventilation).
●Make sure that the controller settings are correct.
4.2 Care
Wipe down the outside of the unit only using a damp
cloth or cloth with mild cleaning agent (washing-up
liquid, neutral cleaning agent). Do not use any harsh,
abrasive, acid or chlorine-based cleaning agents.
3.4 Function
Liquid refrigerant is evaporated (evaporator), the
energy for this process is environmental heat and
comes from the outside air. The gaseous refrigerant
is compressed (compressor), this causes the pressure
to rise and therefore the temperature too. The
gaseousrefrigerantatahightemperatureisliqueed
(condenser).
The high temperature is hereby discharged to the
heating water and is used in the heating circuit.
The liquid refrigerant at a high pressure and high
temperature is depressurised (expansion valve).
The pressure and temperature drop and the process
begins again.
The heated heating water can be used for the domestic
hot water charging or for the building heating. 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 an electric heating element, which
is activated by the heat pump controller as and when
necessary.
The vibration decoupling for the hydraulics prevent
structure-borne sound and vibrations from being
transferredintothexedpipesandthereforeintothe
building.
Cooling
Cooling is integrated in the units. The following
options are possible for units with cooling function
( operating manual of the heating and heat pump
controller):
●Active cooling
Cooling in conjunction with hydraulic module
HV 4 or hydraulic station HSV 4 possible to 18°C.
Possible to 7 °C in conjunction with wall-mounted
controller WR 4.
●Cooling below 18°C is only possible in the case
ofhydraulicintegrationwithseparationbu󰀨ertank
●Control of the cooling function via the heating and
heat pump controller
●Changeover between heating and cooling
operation

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5 Delivery, storage, transport
and installation
IMPORTANT
Damage to the housing and the unit components
due to heavy objects.
►Do not place any objects on the unit.
5.1 Scope of supply
►Check delivery immediately after receipt for
externallyvisibledamageandcompleteness.
►Notify supplier of any defects immediately.
The accompanying parts package contains:
●Hydraulic connection pipe with integrated vibra-
tion decouplingandseal(2x)
● Condensatedrainsyphon(1x)
● Pipeconnector(1x)
● Springclampsforcondensationhose(2x)
● Insulationforcondensatedrainsyphon(1x)
●Documents (manuals, ERP data and label)
●Nameplate
5.2 Storage
►Do not unpack the unit until directly before
installation if possible.
►Store unit protected against
●Moisture/damp
●Frost
●Dust and dirt
5.3 Transport and unpacking
Notes on safe transport
The unit is heavy ( “Technical data / Scope of
supply”, page 24). There is a risk of injuries or
damage to property if the unit falls or overturns.
The hydraulic connections are not designed for
mechanical loads.
►Do not lift or transport the unit by the hydraulic
connections.
Transport the unit preferably with a pallet truck,
alternatively with a handcart or by carrying
►Do not tilt the unit by more than 45°.
5.3.1 Transport with a pallet truck
5.3.2 Unpacking
1. Remove plastic lms. Ensure that you do not
damage the unit.
2. Lift o󰀨 EPS packaging with the accompanying
parts package from the unit and put it in a safe
place.
3. Dispose of the transport and packaging material
in an environmentally friendly way and in
accordance with local regulations.
5.3.3 Transport with a handcart
1. Remove the front panel and put it down in a safe
place.
2x
1
2

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2. Remove the side panels and put it down in a safe
place.
Exampleofrightsidepanel:
3x
3
4
►Proceed in reverse order to reattach the panels.
3. Lift the unit from the front onto a handcart and se-
cure it there before transporting it to the installa-
tion site.
≤ 45°
5.3.4 Carrying the unit
1. Remove the panels of the unit.
“5.3.3 Transport with a handcart”, page 9
►Carry the unit to the installation site with 2 per-
sons.
5.4 Installation
CAUTION
In the air outlet area the air temperature is
approx. 5 K below the ambient temperature.
Under certain climatic conditions, an ice
layer can therefore form in the air outlet
area. Install the heat pump such that the
air blower does not discharge into footpath
areas .
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 according to EN 378-1 relevant
in Germany.
Refrigerant Limit value [kg/m³]
R 134a 0.25
R 404A 0.52
R 407C 0.31
R 410A 0.44
R 448A 0.39
R 454B 0.059
“Technical data / Scope of supply”, 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
di󰀨erent types are installed, only the heat
pump with the largest refrigerant volume
needs to be taken into account.

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Minimum volume corresponds to the requirements
for the refrigerant used.
Installation inside the building only.
Installation room is dry and frost-free.
RequirementsforexibleairductsystemADHare
met.
Installationmanualoftheexibleairductsystem
ADH
Clearance dimensions are met.
“Installation plans”, from page 28
Theoorissuitableforinstallationoftheunit:
●level and horizontal
●Load-bearing capacity for the unit's weight
NOTE
The noise emissions of the heat pumps
must be taken into account in the respective
installation plans for air/water heat pumps.
The respective regional regulations must be
observed.
NOTE
The unit should not be installed immediately
nextto,beloworabovenoise-sensitiverooms
(e.g. bedrooms, children’s rooms, etc.).
If the unit is nonetheless installed in the im-
mediateproximityofnoise-sensitiverooms,
we recommend that additional construc-
tional measures be taken to reduce noise.
No air intake or outlet openings should be
located in the proximity of the windows of
noise-sensitive rooms.
Aligning the unit
1. Align the unit horizontally and stably at the instal-
lation site using the height-adjustable feet (①) and
a size 13 spanner.
Adjustment range: 20 mm.
2. Then fasten with the size 17 lock nuts (②).
4x
1
5.5 Installation of air ducting
Operating manual of the exible air duct system
ADH
6 Installing the hydraulic
connections
IMPORTANT
Dirtanddepositsinthe(existing)hydraulicsystem
can cause damage to the heat pump.
►Ensure that a sludge separator is installed in the
hydraulic system.
►Rinse the hydraulic system thoroughly prior to es-
tablishing the hydraulic connection of the heat
pump.
IMPORTANT
Damage to the copper pipes due to unacceptable
loading!
►Secure all connections against twisting.
Cross-sections and lengths of the pipes for the
heating circuit are adequately dimensioned.
The free pressing of the recirculating pump
produces at least the minimum throughput
required for the unit type ( “Technical data /
Scope of supply”, page 24).
The hydraulic system must be equipped with a
bu󰀨ertank,therequiredvolumeofwhichdepends
on your unit model.
“Technical data / Scope of supply”, page 24

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The pipes for the heating are xed to the wall or
ceilingviaaxedpoint.
1. Attach the hydraulic connection pipes (①) to the
connections (②) on the back of the unit. Use seals
from the accompanying parts package.
12
2. Depending on the connection situation heating cir-
cuit↔heatpumpformthevibrationdecouplings in-
to a 90° elbow bend to the right or to the left.
When laying to the right:
Route the vibration decoupling for the heating water
water supply (④) above the condensate outlet (⑤).
Exampleofconnectiontotheright:
90°
4
5
90°
IMPORTANT
Straight or stretched laying of the vibration decou-
plings is not permitted.
3. Connect the hydraulic connection pipes to the corre-
spondingxedpipingoftheheatingcircuit.
NOTE
Hydraulic connection pipes can be shortened
if necessary.
4. Insert a vent at the highest point of the heating cir-
cuit.
5. Ensure that the working overpressures
(“Technical data / Scope of supply”, page 24)
arenotexceeded.
Pressure relief for hydraulic line
► Ifthereisashut-o󰀨valvebetweentheheatgen-
eratorandtheheatsink,tapressurereliefvalve.
Condensate connection
The outlet for the heating water safety valve and
the condensate from the air must be drained o󰀨 in
accordance with the respective applicable standards
and regulations. Discharging the condensate and the
safety valve outlet into the sewers is only permitted via
a funnel waste trap, which must be accessible at all
times.
NOTE
The condensate connection can be at-
tached to the right or left.
1. Use components from the accompanying parts
package.
Example:condensateconnectiontotheright
2
1
2
1
1 Spring clamp
2 Syphon

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4
3
3 Spring clamp
4 Pipe connector
2. Attach a sewage pipe (on site) (⑤) to the pipe con-
nection (④) and lay it on a gradient to the sewers.
5
4
3. Apply insulation (⑥)tothesyphonandxwithca-
ble ties (⑦).
6
77
7 Electrical installation
7.1 Connect the electrical cables
IMPORTANT
Irreparable damage to the compressor due to
wrong rotary eld (only applies to units with 400V
connection).
► Ensurethatthereisaclockwiserotaryeldforthe
compressor load infeed.
Basic information on the electrical connection
● The specications of the local energy 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 (per IEC 60947-2)
●Note the level of the tripping current
( “Technical data / Scope of supply”,
page 24)
●Comply with the electromagnetic compatibility
regulations (EMC regulations)
●Lay unshielded power supply cables and
shielded cables (bus cable) su󰀩ciently far apart
(> 100 mm).
Connect the heat pump with the hydraulic unit
or wall-mounted controller
The connection is established using the EVS or
EVS 8 accessory.
●EVS 8 load and bus connector with 8 m cable.
Amaximumof3EVS8connectionsarepossible.
EVS 8 installation instructions
●EVS: Load and bus connector.
Cableonsite,maximumcablelengthof30m.
The bus cable must be a shielded cable of at least
4x0.5mm².
As load line:
A3x2.5mm²cablewithprotectiveconductor,Di-
ameter of the sheath of the electric cable cable
9–13mm²
1. Guide the load cable and bus cable in a cable con-
duit from the heat pump module up to the building
feed-through, and from there to the wall-mounted
controller or the hydraulic unit inside the building.
Operating manual of the wall-mounted controller
or
Operating manual of the hydraulic unit

14 Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
2. Connectthecompressorloadcabletotheve-pin
plug included in the scope of delivery of the heat
pump.
2.1. Break a lock of one of the cable bushings (①)
carefully out of the pre-engaged strain relief
housing (②) and push the strain relief housing
approx.50cmovertheloadcable(③).
≈ 5 0 c m
2.2. Strip the load cable 55 mm.
55 mm
2.3. Shorten the live wires so that the PE conductor
has a lead of 8mm.
8 mm
PE
2.4. Strip each wire 9mm.
9 mm
PE
9 mm
2.5. Insertthestrippedwiresintothepinsoftheve-
pin plug (④).
N
L
►If the load cable has single wires, insert each
of them as far as they will go:
Insert the N and PE conductor in the plug pins la-
belled accordingly and insert the L conductor in
the L1 plug pin.
► Iftheloadcablehasnewirestrands:
●Twist the strands of each wire.
L
N
●Insert an operating tool or screwdriver
(2.5mm blade width) in the connection lock
of the neutral conductor plug pin to unlock
the connection lock.
●Insert the twisted wire of the neutral con-
ductor as far as it will go into the neutral
conductor plug pin.
N
L
●Pull the operating tool or screwdriver out of
the neutral conductor plug pin to lock the
connection.
N
L
●insert the PE conductor in the plug pin la-
belled accordingly and insert the L conduc-
tor in the L1 plug pin:
IMPORTANT
Checkeachinsertedwirefortightttinginitsplugpin.
2.6. Push the strain relief housing (②) onto the wired
plug (④).
N
L
L2
L3
2.7. Align them correctly to each other: The top side
of the plug and the top side of the strain relief
housing are both marked with “TOP”.

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Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
2.8. Push the plug as far as it will go into the strain re-
lief housing.
2.9. Lockthetoppartofthestrainreliefhousingrmly
onto the bottom part.
2.10. Screw the strain relief screw tight.
3. Connect the bus cable (communication) to the bus
plug included in the scope of delivery of the heat
pump.
3.1. Insert the contact spring (⑤) into pin 3 of the bus
plug (⑥) up to the limit stop
The lugs on the broad end of the contact spring
must point upwards (in the direction of the num-
bers on the bus plug).
NOTE
If the contact spring is in the way when sub-
sequently inserting the wires of the bus ca-
ble, it can be disconnected and re-connected
after inserting the wires.
3.2. Strip the bus cable 30 mm.
30 mm
3.3. Push the shielding braid back 10 mm over the
sheath.
3.4. Pull back the shielding foil up to the shielding braid
andcuto󰀨.

16 Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
3.5. Strip each wire 9mm.
3.6. Twist the strands of each wire.
3.7. Insert an operating tool or screwdriver (blade
2.5x0.4mm)intheconnectionlockonplugpin5
to unlock connection lock.
3.8. Place the cable with shielding braid onto the con-
tact spring from above and insert the brown wire
into the connector pin 5 up to the limit stop.
3.9. Pull the operating tool or screwdriver out of the
bus plug and thereby lock the connection of plug
5.
3.10. Insert the three other wires in the same way into
the corresponding plug pins.
Assignments of the plug pins
white wire of the bus cablewhite wire of the bus cable Plug pin 1Plug pin 1
green wire of the bus cablegreen wire of the bus cable Plug pin 2Plug pin 2
Shielding braid on contact springShielding braid on contact spring Plug pin 3Plug pin 3
yellow wire of the bus cableyellow wire of the bus cable Plug pin 4Plug pin 4
brown wire of the bus cablebrown wire of the bus cable Plug pin 5Plug pin 5
IMPORTANT
Checkeachinsertedwirefortightttinginitsplugpin.
3.11. Place the shielding braid on the contact spring
and, if necessary, shorten it so that it does not go
beyond the contact spring.
3.12. Assemble the plug housing.
3.13. Snap the wired plug into the lower part of the
housing (⑦).
3.14. Fit the strain relief (⑧) and clip into place until the
buscableisclampedrmly.
IMPORTANT
Theshieldingbraidmusthaveadirectandrmcon-
tact with the contact spring.
3.15. Snap the upper part of the housing (⑨) fully onto
the lower part
4. Connect the contact spring and bus cable (com-
munication) in the same way to the ve-pin bus
connector socket included in the scope of deliv-
ery of the heat pump and assemble the connector
socket housing.
IMPORTANT
The wire assignment of the bus connector socket
must match the wire assignment of the bus plug.
“Assignments of the plug pins”, page 16

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Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
5. Connect all connectors.
5.1. Remove the cover (⑩) for the plug-in connec-
tions on the back of the unit.
2x
10
5.2. Open the strain reliefs (⑪).
2x
11
5.3. Plug the load cable plug (⑫) and bus plug (⑬) in-
to the corresponding sockets.
13
12
5.4. Route both plug-in cables through the strain re-
liefs and tighten the strain reliefs.
5.5. Fit the cover of the plug-in connections.
6. Plug the load cable connector and bus connector
into the corresponding sockets on the wall-mount-
ed controller or on the underside of the electrical
switchboxofthehydraulicunit.
Operating manual of the wall-mounted controller
or
Operating manual of the hydraulic unit
8 Flushing,llingandventing
8.1 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) or with water corresponding to the VDI
2035 norm only (low-salt operation of the system).
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-alkalisationafterlling
the system
►If the required water quality is not achieved, con-
sult a company specialising in the treatment of
heating water.
►Keep a system log for hot water heating systems
in which relevant planning data is entered (VDI
2035).

18 Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
8.2 Flush,llandventtheheating
circuit
Outlet pipe of the safety valve is connected.
►Ensure that the set pressure of the safety valve is
notexceeded.
NOTE
The venting program on the controller can
also be used to support the ushing and
venting process. It is possible to control
individual recirculating pumps and even the
switching valve through the venting program.
The valve motor then does not have to be
removed.
1. Vent system at the respective highest point.
2. Pullo󰀨theU-clip(①) on the back of the valve mo-
tor (②) on the switching valve (③, integrated in hy-
draulic station HSV 4, accessories for module for
hydraulics HV 4 or wall-mounted controller) up-
wards.
23
1
3. Carefully pull the valve motor (②) forwardo󰀨the
3-way switching valve (③).
2
3
4. Turn the spindle of the 3-way switching valve so
that the rounded side of the spindle points in the
direction of marking A of the connections of the
3-way switching valve.
A
B
5. Flush the domestic hot water charging circuit for
approx.1minute.
6. 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 switching valve.
7. Flush heating circuit thoroughly, until no more air
is discharged.
8. Position the valve motor (②) on the 3-way switch-
ing valve (③).
2
3
9. Insert the U-clip (①) on the back of the valve mo-
tor (②).
2
1

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10. Ensure that the U-clip has latched into position
correctly:
Valve motor sits securely on the 3-way switch-
ing valve.
Both prongs of the U-clip sit on the lug.
The tips of the U-clip are not visible more than
approx.2mm.
11. Swap the hoses at the lling and draining stop
cocksandushthecondenseroftheheatpump
via the return.
12. In addition, open the vent valve on the condens-
er of the heat pump. Vent the condenser and then
close the vent valve again when fully vented.
Operating manual of the switching valve
9 Insulate hydraulic connections
Insulate hydraulic lines in accordance with local
regulations.
1. Openshut-o󰀨devices.
2. Perform a pressure test and check for leaks.
3. Insulateexternalpipingonsite.
4. Insulateallconnections,ttingsandpipes.
5. If the device is used for cooling below 18°C
(only possible in combination with the wall-
mounted controller), the insulation must be vapour
di󰀨usion-tight.
10 Overowvalve
(integrated with Hydraulic station HSV4, accessory
with hydraulic module HV 4 or wall-mounted controller
WR 4)
NOTE
●The activities in this section are only
necessary for the integration of storage
tanks in series
●Complete the work steps quickly, otherwise
the maximum return temperature may be
exceeded and the heat pump switches to
high-pressure fault
● Turn the adjusting knob at the overow
valve to the right to increase the
temperature di󰀨erence (the temperature
drop), turn it to the left to reduce it
System is running in heating mode (ideally in cold
condition).
The IBN assistant already provides the option, in the
event of the integration of the storage tank in series to
adjustthe overowvalveaccordingto to the hydrau-
lic system.
ConrmtheIBNassistantor:

20 Subject to technical amendments without prior notice | 83071000aUK | ait-deutschland GmbH
The “Set bypass valve” menu item is set by default to
“No”.Theoverowvalveadjustmentfunctionisdeac-
tivated.
●The UWP control signal is the indication of the
currently required pump capacity in %
● Iftheowrateisthecurrentowrate(measuring
accuracy +/- 200 l/h)
1. Fully opentheoverowvalve(➀) with the rotary
button (②), close the heating circuits.
1
2
2. If the “Set bypass valve” menu item is set from
“No” to “Yes”, the circulation pump is activated
with 100% – and the pump starts up.
3. If the control signal UWP reaches 100%, close
theoverowvalvetotheextentthatthemaximum
ow rate (“Technical data / Scope of supply”,
page 24) can be ensured.
4. Ifyouexitthe“Setbypassvalve”menuoratthe
latest after one hour, the circulation pump switch-
es back to standard regulation
5. Open valves to heating circuit.
11 Commissioning
CAUTION
Start up the unit only with fully installed
components of the exible air duct system
ADH and closed facing panels.
Relevant planning & design data of the system is
documented in full.
The relevant energy supply company has been
notiedofoperationoftheheatpumpsystem.
The system is air-free.
Installation check using the general checklist has
been completed successfully.
Right-hand(clockwise)rotatingloadsupplyeldis
available at the compressor (only applies to units
with 400V connection).
The system is installed and mounted according to
this operating manual
The electrical installation has been carried out
properly according to this operating manual and
the local regulations
The power supply for the heat pump is equipped
with an all-pole circuit-breaker with at least 3 mm
contact spacing (IEC 60947-2)
The tripping current is complied with
Theheatingcircuithasbeenushedandvented
Allshut-o󰀨devicesoftheheatingcircuitareopen
The pipe systems and components of the system
are tight