alphainnoTec LWD 70A User manual

UK
Operating Manual
LWD 50A • LWD 70A • LWD 90A
LWD 50A/RX • LWD 70A/RX
Air/Water Heat Pumps
Dual / Outdoor Installation
83053500kUK – Translation into English of the original German operating manual

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Please read rst
This operating manual provides important information
on the handling of the unit. It is an integral part of the
product and must be stored so that it is accessible in the
immediate vicinity of the unit. It must remain available
throughout the entire service life of the unit. It must be
handed over to subsequent owners or users of the unit.
Read the operating manual before working on or
operating the unit. This applies in particular to the
chapter on safety. Always follow all instructions
completely and without restrictions.
It is possible that this operating manual may contain
instructions that seem incomprehensible or unclear. In
the event of any questions or if any details are unclear,
contact the factory customer service department or the
manufacturer’s local partner.
Since this operating manual was written for several
different models of the unit, always comply with the
parameters for the respective model.
This operating manual is intended only for persons
assigned to work on or operate the unit. Treat all
constituent parts condentially. The information
contained herein is protected by copyright. No part of
this manual may be reproduced, transmitted, copied,
stored in electronic data systems or translated into
another language, either wholly or in part, without the
express written permission of the manufacturer.
Symbols
The following symbols are used in the operating manual.
They have the following meaning:
Information for operators.
Information or instructions for qualied
technicians.
DANGER!
Indicates a direct impending danger
resulting in severe injuries or death.
WARNING!
Indicates a potentially dangerous situation
that could result in serious injuries or
death.
CAUTION!
Indicates a potentially dangerous situation
that could result in medium or slight
injuries.
ATTENTION
Indicates a potentially dangerous situation, which
could result in property damage.
NOTICE.
Emphasised information.
Flammable materials
Dangerous electrical voltage
€ENERGY SAVING TIP
Indicates suggestions that help to save energy,
raw materials and costs.
Reference to other sections of the operating
manual.
Reference to other documents of the
manufacturer.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Contents
INFORMATION FOR USERS AND QUALIFIED
PERSONNEL
PLEASE READ FIRST..................................................................2
SYMBOLS .....................................................................................2
INTENDED USE..........................................................................4
DISCLAIMER................................................................................4
EC CONFORMITY .....................................................................4
SAFETY .........................................................................................4
CUSTOMER SERVICE ................................................................5
WARRANTY / GUARANTEE ....................................................5
DISPOSAL ....................................................................................5
OPERATING PRINCIPLE OF HEAT PUMPS ..........................6
AREA OF UTILISATION............................................................6
HEAT METERING.......................................................................6
OP ER ATI ON ................................................................................6
CARE OF THE UNIT..................................................................6
MAINTENANCE OF THE UNIT ..............................................6
Cleaning and flushing of unit components........................7
MALFUNCTIONS.......................................................................7
INSTRUCTIONS FOR QUALIFIED TECHNICIANS
SCOPE OF DELIVERY ................................................................7
Main components..................................................................8
INSTALLATION AND ASSEMBLY...........................................8
Installation location..............................................................8
Transport to installation location......................................8
Sound ......................................................................................9
Installation............................................................................11
Installation with wall bracket............................................ 11
Installation on floor bracket .............................................11
Condensate drain ..............................................................11
Connection to the heating circuit....................................12
ELECTRICAL CONNECTIONS .............................................13
PRESSURE RELIEF.....................................................................14
OVERFLOW VALVE..................................................................14
BUFFER TANK...........................................................................14
CIRCULATING PUMPS ...........................................................14
DOMESTIC WATER HEATING..............................................14
DOMESTIC HOT WATER TANK ..........................................14
RINSING, FILLING AND BLEEDING THE SYSTEM ..........15
Water quality of the fill and additional water in hot
water heating systems .................................................15
INSULATING THE HYDRAULIC CONNECTIONS ..........16
COMMISSIONING ...................................................................17
DISMANTLING .........................................................................17
Withdrawal from service...................................................18
Markings ...............................................................................18
Recovery/recycling..............................................................18
TECHNICAL DATA / SCOPE OF DELIVERY
LWD 50A – LWD 90A .......................................................20
LWD 50A /RX– LWD 70A/RX .........................................22
PERFORMANCE CURVES
LWD 50A Heating mode ...................................................24
LWD 70A Heating mode....................................................25
LWD 90A Heating mode ...................................................26
LWD 50A/RX Heating mode ............................................27
LWD 50A/RX Cooling mode ............................................28
LWD 70A/RX Heating mode ............................................29
LWD 70A/RX Cooling mode ............................................30
DIMENSIONAL DRAWINGS .................................................31
INSTALLATION PROTECTION AREAS...............................32
WALL BRACKET INSTALLATION PLAN............................33
Wall feedthrough
FLOOR BRACKET INSTALLATION PLAN..........................34
Hydraulic connection pipe
FLOOR BRACKET INSTALLATION PLAN..........................35
Wall feedthrough
FLOOR BRACKET INSTALLATION PLAN..........................36
Hydraulic connection pipe
DRILLING PATTERN FOR WALL BRACKET......................37
Wall feedthrough
DRILLING PATTERN FOR WALL BRACKET......................38
Hydraulic connection pipe
VIEW OF FOUNDATION V3 .................................................39
Wall feedthrough
VIEW OF FOUNDATION V4 ................................................ 40
Hydraulic connection pipe
MINIMUM CLEARANCES.......................................................41
OUTSIDE CONNECTION OF CONDENSATE PIPE.........42
INSIDE CONNECTION OF CONDENSATE PIPE .............43
CIRCUIT DIAGRAMS
LWD 50A(RX) – LWD 70A(RX), LWD 90A................. 44

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Intended use
The unit may be used only for the intended purpose. This
means - only in combination with the manufacturer’s
hydraulic module or hydraulic tower “Dual” (not the R
variant):
•for heating
•for cooling (RX variants only)
•for domestic water heating
The unit may be operated only within its technical
parameters.
Overview “Technical data / scope of delivery”.
NOTE.
Notify the responsible power supply company of
the use of a heat pump or heat pump system.
ATTENTION
The unit is not suitable for use in IT network
systems.
CAUTION!
The unit may only be stored in rooms
that do not contain permanent ignition
sources. Do not drill or torch!
Disclaimer
The manufacturer is not liable for losses resulting from
any use of the unit which is not its intended use.
The manufacturer’s liability also expires:
•if work is carried out on the unit and its
components contrary to the instructions in this
operating manual.
• if work is improperly carried out on the unit and
its components.
•if work is carried out on the unit which is not
described in this operating manual, and this
work has not been explicitly approved by the
manufacturer in writing.
•if the unit or components in the unit have been
altered, modied or removed without the explicit
written consent of the manufacturer.
EC conformity
The unit bears the CE mark of conformity.
EC declaration of conformity
(see manual HMD, HTD).
Safety
The unit is safe to operate for its intended use. The
construction and design of the unit conform to current
state of the art standards, all relevant DIN/VDE
regulations and all relevant safety regulations.
Every person who performs work on the unit must
have read and understood the operating manual prior
to starting any work. This also applies if the respective
person has already worked with such a unit or a similar
unit or has been trained by the manufacturer.
Every person who performs work on the unit must
comply with the applicable accident prevention and
safety regulations. This applies in particular to the
wearing of personal protective equipment.
DANGER!
Risk of fatal injury due to electric shock!
Electrical connections may be installed
only by qualied electricians.
Before opening the unit, disconnect the
system from the power supply and secure
it from being switched back on!
WARNING!
Only qualied personnel (trained heating,
cooling and refrigerant tters and
electricians) may perform work on the
unit and its components.
WARNING!
Observe safety labels on and in the unit.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
WARNING!
Unit contains ammable refrigerants!
If refrigerant leaks an explosion hazard is
caused. If this happens:
– Shut down unit.
– Notify the manufacturer’s authorised
service centre.
– Keep ignition sources away.
ATTENTION
For safety reasons:
Never disconnect the unit from the power sup-
ply, unless the unit is being opened.
ATTENTION
Install the heat pump only outdoors and operate
only with outside air as the heat source. Do not
restrict or block the air-conducting sides.
Dimensional drawing and installation plan for
respective model.
WARNING!
Never switch on unit if façade parts on the
unit are removed.
ATTENTION
It is not permitted to integrate the heat pump in
ventilation systems. The use of the cooled air for
cooling purposes is not permitted.
ATTENTION
The ambient air at the place in which the heat
pump is installed, as well as the air drawn in as
a heat source, must not contain any corrosive
constituents!
Constituents (such as ammonia, sulphur, chlo-
rine, salt, sewage gases, ue gases…) can cause
damage to the heat pump, which can lead to
complete failure / irreparable damage to the
heat pump!
ATTENTION
By cooling with low ow temperatures, conden-
sate can be expected to form on the heat distri-
bution system as the temperature falls below the
dew point. If the heat distribution system is not
designed for these operating conditions, it must
be protected by appropriate safety devices, e.g.
dew point monitor (purchasable accessory).
NOTE
If the heating surfaces are used for heating and
cooling, the control valves must be suitable for
heating and cooling.
In addition, a dew-point monitor should be used
for cooling.
NOTE
Water accumulations resulting from extreme
weather conditions, or from condensation in, on
and under the unit which do not ow away via
the condensate discharge are normal and do not
constitute a heat-pump malfunction or defect
Customer service
For technical assistance, please contact your qualied
technician or the manufacturer’s local service partner.
For a current list and additional partners of the manufac-
turer, please visit
DE: www.alpha-innotec.de
EU: www.alpha-innotec.com
Warranty / Guarantee
For warranty and guarantee conditions, please refer to
the purchase documents.
NOTE.
Please contact your dealer concerning warran-
ties and guarantees.
Disposal
When decommissioning the unit, always comply with
applicable laws, directives and standards for the recovery,
recycling and disposal of materials and components of
cooling units.
“Dismantling”.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Operating principle of heat
pumps
Heat pumps operate on the same principle as a
refrigerator: same technology, only with reversed
benets. The refrigerator extracts heat from foods,
which is released into the room through ns on the back.
The heat pump extracts heat from our environment: air,
earth or water. The extracted heat is conditioned in the
unit and supplied to the heating water. Even when it is
extremely cold outside, the heat pump draws enough
heat to heat a house.
Example: drawing of a brine/water heat pump with
underoor heating:
4/4= usable energy
approx. 3/4= environmental energy
approx. 1⁄4= external
electrical energy
Area of utilisation
Taking into consideration the ambient conditions, limits
of application and the applicable regulations, every heat
pump can be utilised in new or existing heating systems.
Overview “Technical data / scope of delivery”.
Heat metering
Operating manual for the heating and heat pump
regulator.
Hydraulic module (Dual) operating manual.
Operation
Hydraulic module (Dual) operating manual.
Care of the unit
The outer surfaces of the unit can be cleaned with a
damp cloth and household cleaning products.
Do not use cleaning or care products that contain
abrasives, acids and/or chlorine. Such products would
destroy the surfaces and could also damage the technical
components of the unit.
Maintenance of the unit
The cooling circuit of the heat pump requires no regu-
lar maintenance.
According to EU regulation (EC) 517/2014, leak
inspections and maintenance of a log book are required
by law for certain heat pumps!
Log book for heat pumps, Section “Information
on use of the log book”.
The components of the heating circuit and the heat
source (valves, expansion vessels, circulating pumps,
lters, dirt traps) should be inspected and cleaned as
necessary - however, at least once a year - by qualied
personnel (heating or cooling system tters).
The intake and blow-out openings must be inspected for
dirt at regular intervals (depending on the installation
location) and cleaned, if necessary.
ATTENTION
Regularly check to ensure that the condensate
can drain out of the unit unobstructed. To do
this, regularly check the condensate tray in the
unit and the condensate drain for dirt / blo-
ckages and if necessary clean.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Icing of the protective grating
If temperatures fall below freezing and humidity is high
at the same time, ice can form on the protective grating.
In order to ensure problem-free operation, the ice must
be removed at regular intervals.
It is best to arrange a maintenance agreement with a
heating installation company. The company will conduct
the required maintenance at regular intervals.
WARNING!
Do not use any objects, other than those
allowed by the manufacturer, to accelerate
the thawing process.
NOTE.
Any person who works on the refrigerant circuit
must have a qualication certicate issued by a
body accredited by the industry.
CLEANING AND FLUSHING OF UNIT COMPONENTS
CAUTION!
Unit components may be cleaned
and ushed only by customer service
personnel authorised by the manufacturer.
Use only liquids recommended by the
manufacturer.
Rinsing of the liqueer with chemical
cleaning agents must be followed by
neutralisation of residue and intensive
ushing with water. Always observe the
technical data of the manufacturer of the
heat exchanger.
Malfunctions
In the event of a fault, you can read out the cause of the
fault from the diagnostic program of the heating and heat
pump regulator.
Operating manual of the heating and heat pump
regulator.
WARNING!
Only customer service personnel
authorised by the manufacturer may
carry out service and repair work on the
components of the unit.
Scope of delivery
LWD 50A(RX), LWD 70A(RX) AND LWD 90A:
1 bus cable, 1 load cable,
1 control cable.
Cable connected on heat pump side.
1 additional box:
- 1 condensate pipe socket + 3 xing screws
-- 1 long Torx bit for façade screws
NOTE.
The outdoor sensor is included with the hydrau-
lic module.
Check the delivery for outwardly visible signs of
damage…
Check to make sure that delivery is complete…
Any defects or incorrect deliveries must be
reported immediately.
Overview “Technical data / scope of delivery”.
FUNCTIONALLY RELEVANT ACCESSORIES
CAUTION.
Use only original accessories from the manufac-
turer of the unit.
Hydraulic module (internal part) with heat pump
regulator, electric heating element, expansion vessel,
heating circulating pump, safety assembly, insulated
housing, stopcocks and drain.
The heat pump is not a functional unit until the hydraulic
module is installed.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
ADDITIONAL ACCESSORIES
- Wall penetration with vibration insulation
- Wall bracket
- Floor bracket
- Vibration insulation
- buffer storage
- overow valve
- covering for Wall bracket
- covering for Floor bracket
- hydraulic connecting line
If the cable length of 5m is not long enough for outdoor
open eld installation, an extension kit (25 m) can be
ordered.
MAIN COMPONENTS
1 condenser
2 compressor
3 evaporator
4 switch
5 fan
Installation and assembly
The units can either be installed mounted on the oor
or mounted on the wall
The following applies to all work to be done:
NOTE.
Always comply with applicable accident pre-
vention regulations, statutory regulations, ordi-
nances and directives.
NOTE.
Observe the sound levels of the respective model.
Overview “Technical data / scope of delivery”,
“Sound” section and “Sound level” overview.
INSTALLATION LOCATION
ATTENTION
Install the unit only outside buildings.
Dimensional drawing, installation plans and
protection areas for the respective model.
TRANSPORT TO INSTALLATION LOCATION
To prevent damage during transport, always transport
the unit to nal installation location in its original
packaging, using a lifting truck, forklift or crane.
NOTE.
The unit is delivered on a pallet with xing rails.
The xing rails can be used for transport.
CAUTION.
Always wear protective gloves if using the
xing rail for transport!
1 xing rail
CAUTION!
Several people are required to transport
the unit. Do not underestimate the weight
of the unit.
Overview “Technical data / scope of delivery”,
“General unit data” section.
ATTENTION
Never use components and hydraulic connec-
tions on the unit for transport purposes.
ATTENTION
Do not tilt the unit more than a maximum of 45°
(in any direction).

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
SOUND
The noise emission from the heat pumps must be taken into account in the respective installation plans for air / water
heat pumps. The respective regional regulations must be complied with.
NOTE.
The following sound pressure levels are calculated values. Other constellations, adjoining other buildings or
even reecting surfaces may lead to a level increase. An exact specication of each sound pressure level is pos-
sible only through a measurement spot when the heat pump is already installed.
The following sound pressure levels result, depending on the distance and installation variant with directivity factor Q-
LWD 50A
Distance in m 12345678910 11 12 13 14 15 16 17 18 19 20
sound pressure level Q2 49 43 39 37 35 33 32 31 30 29 28 27 27 26 25 25 24 24 23 23
sound pressure level Q4 52 46 42 40 38 36 35 34 33 32 31 30 30 29 28 28 27 27 26 26
sound pressure level Q8 55 49 45 43 41 39 38 37 36 35 34 33 33 32 31 31 30 30 29 29
LWD 50A/RX
Distance in m 12345678910 11 12 13 14 15 16 17 18 19 20
sound pressure level Q2 49 43 39 37 35 33 32 31 30 29 28 27 27 26 25 25 24 24 23 23
sound pressure level Q4 52 46 42 40 38 36 35 34 33 32 31 30 30 29 28 28 27 27 26 26
sound pressure level Q8 55 49 45 43 41 39 38 37 36 35 34 33 33 32 31 31 30 30 29 29
LWD 70A
Distance in m 12345678910 11 12 13 14 15 16 17 18 19 20
sound pressure level Q2 49 43 39 37 35 33 32 31 30 29 28 27 27 26 25 25 24 24 23 23
sound pressure level Q4 52 46 42 40 38 36 35 34 33 32 31 30 30 29 28 28 27 27 26 26
sound pressure level Q8 55 49 45 43 41 39 38 37 36 35 34 33 33 32 31 31 30 30 29 29
LWD 70A/RX
Distance in m 12345678910 11 12 13 14 15 16 17 18 19 20
sound pressure level Q2 49 43 39 37 35 33 32 31 30 29 28 27 27 26 25 25 24 24 23 23
sound pressure level Q4 52 46 42 40 38 36 35 34 33 32 31 30 30 29 28 28 27 27 26 26
sound pressure level Q8 55 49 45 43 41 39 38 37 36 35 34 33 33 32 31 31 30 30 29 29
LWD 90A
Distance in m 12345678910 11 12 13 14 15 16 17 18 19 20
sound pressure level Q2 51 45 41 39 37 35 34 33 32 31 30 29 29 28 27 27 26 26 25 25
sound pressure level Q4 54 48 44 42 40 38 37 36 35 34 33 32 32 31 30 30 29 29 28 28
sound pressure level Q8 57 51 47 45 43 41 40 39 38 37 36 35 35 34 33 33 32 32 31 31

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Q = 2
Q = 4
Q = 8
The directivity factor Q for the different installation va-
riants:
Q2: Outdoor installation without sound reection
Q4: Air outlet/air intake at the wall
Q8: Air outlet/air intake at the wall (corner installation
less than 3 m, or opposite wall less than 5 m, or roof
less than 3m. There may be a maximum of two walls or
roofs, otherwise, an allowance of 3dB(A) must be added
for each additional wall or roof.)
In case of 2 or more units of the same heat pump type,
the respective level increase must be added to the cor-
responding sound pressure level from the following table
Number of n equally
loud sound sources
Level increase
∆Lin dB
1 0,0
2 3,0
3 4,8
4 6,0
5 7,0
6 7,8
7 8,5
8 9,0
9 9,5
10 10,0
12 10,8
In case of different, not equally loud units, the level in-
crease is read off the following diagram:
Level increase in dB
Level difference in dB
Example: If the level difference between two unequal
sound sources is 5 dB, the level increase is an additio-
nal 1.2 dB.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
INSTALLATION
PREPARING THE INSTALLATION, TOGETHER WITH THE
WALL PENETRATION
To connect the outdoor unit with the indoor part
(hydraulic module), an opening must be provided for the
wall penetration (accessory) or a hole must be made
to enable the KG pipe Ø125 mm (= accessory Wall
penetration) to be installed. If the wall penetration is
not yet available, it is possible to work in advance using a
standard KG pipe, 1m long DN 125.
NOTE.
Always keep to the installation plan for the re-
spective model. Observe minimum spacings and
protection areas.
Installation plan and dimensional drawings and
protection areas for the respective model.
CAUTION.
In the air outlet area the air temperature
is ca. 5 K below the ambient temperature.
Under certain climatic conditions,
therefore, an ice layer can form in the
air outlet area.Install the heat pump so
that the air blower does not blow in the
direction of footpaths.
CAUTION.
Several people are required to install the
unit.
NOTE.
The ground surface in the air outlet area of the
heat pump must be permeable to water.
NOTE.
Always ensure you keep to the specied distance
from the wall, from wall openings, windows, light
wells and similar.
See “Dimensional drawings and protection
areas”.
NOTE.
If the wall penetration is not used, the LIN bus
cable must be laid through a separate conduit,
separated from the other cables.
The two other cables must also be laid on site
using reserve conduits.
NOTE.
Always ensure minimum wall area is available.
Always keep to the installation plan. Note and
keep to minimum spacings.
INSTALLATION WITH WALL BRACKET
See “Installation instructions wall bracket”..
See ”Wall penetration installation instructions”.
See “Installation plans/minimum spacings/drilling
pattern”.
The wall bracket is only suitable for solid. load-bearing
walls. In the case of wooden stud walls with panelling the
oor-mounted bracket should be used to avoid possible
structurally-borne sound transfer to the interior rooms
INSTALLATION ON FLOOR BRACKET
It is possible to install the unit near a wall or in an
open space. The heat pump should ideally be installed
in a wind-protected position. If this is not possible it
is advisable to install it transversely to the main wind
direction or air routing with the main wind direction.
Place the unit on a solid, level and load-bearing
foundation. The foundation must not be connected to
the building. Make sure that the foundation is designed
for the weight of the heat pump.
See “Installation instructions oor bracket”.
See “Wall penetration installation instructions”.
See “Installation plans/minimum spacings/view of
foundation”.
NOTE.
If installing with wall penetration, ensure the
correct distance from the wall is maintained.
CONDENSATE DRAIN
The condensate from the air must be discharged frost-
free through a plastic condensate pipe with a minimum
diameter of 40 mm. If subsoils are permeable to water, it
is sufcient to lay the condensate pipe vertically at least
90 cm into the ground.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
CONNECTION TO THE HEATING CIRCUIT
Flush heating circuit thoroughly before connecting
the unit to the heating circuit…
NOTE.
Contamination and deposits in the heating
circuit can cause malfunctions.
Install shut-off devices for the hot water outow
(forward ow) and hot water inow (return ow)
on the heat pump side.
ATTENTION
Connect the unit to the heating circuit according
to the hydraulic diagram for the respective model.
“Hydraulic connection” instructions.
NOTE.
Check to make sure that the diameters and
lengths of the pipes for the heating circuit (in-
cluding the pipes laid in the ground between the
heat pump and the building!) are adequately di-
mensioned.
Push the sealing plate supplied into the recess in the
housing oor:
1 Sealing plate
2 Leadthroughs for heating water
3 Leadthroughs for electric cables
ATTENTION
When installing the connections, always secure
the connections on the unit against twisting, to
prevent damage to the copper pipes inside the
unit.
Connect the unit to the xed piping of the
heating circuit via vibration decouplers (vibration
installation - stainless steel corrugated pipes,
Use the screws provided to install the condensate
connection socket, included with the unit, to the
condensate drain at the underside of the unit.
Outdoors:
Connect the condensate pipe (wall penetration
accessory) to the condensate connection socket.
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See “Wall penetration installation instructions”.
The condensate pipe may not be laid alone; it must be
inserted into a second pipe suitable for laying in the
ground (for example, KG pipe), before it is lowered into
the ground!
The connection of both pipes must be sealed. It must be
possible to adjust the length. The pipe at the unit must
not sit on the ground, but must be able to be moved.
ATTENTION
Ensure adequate percolation of the discharged
condensate into the ground!
To the inside:
Insert the condensate pipe (wall penetration
accessory) through the wall penetration (accessory-
use lubricant) and connect to the supplied plastic
elbow at the condensate connection socket.
See “Wall penetration installation instructions”.
NOTE.
If the condensate pipe is not laid to the inside,
the openings in the wall penetration at the front
and back must be closed off with the plugs sup-
plied.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
accessory). You must install them to prevent the
transfer of structural borne sound to the xed
piping.
See “Installation instructions vibration
insulation”.
1 Connection, heating water
outlet (forward ow)
2 Connection, heating water inlet (return ow)
3 Condensation water pipe
Vibration insulation (accessory or wall penetration
scope of delivery):
Feed the stainless steel corrugated pipes through
the seal in the bottom of the housing and screw
onto the two pipes in the wall penetration.
Install ow line rst, then return ow.
CAUTION.
If a wall penetration is not used, then lay the
outdoor xed piping of the heating circuit below
the frost limit in the ground.
Electrical connections
The following applies to all work to be done:
DANGER!
Risk of fatal injury due to electric shock!
All electrical connections must be carried
out by qualied electricians only.
Before opening the unit, disconnect the
system from the power supply and secure
it from being switched back on!
WARNING!
During installation and while carrying out
electrical work, comply with the relevant
EN‑, VDE and/or local safety regulations.
Comply with technical connection
requirements of the responsible power
supply company (if required by the latter)!
ATTENTION .
Ensure clockwise rotary eld of the load power
supply (compressor).
Operation with incorrect rotary direction of the
compressor can cause serious, irreparable da-
mage to the compressor.
ATTENTION .
The power supply for the heat pump must be
equipped with a three-phase automatic circuit-
breaker with at least 3mm contact spacing to
IEC 60947-2.
Note the level of the tripping current.
Overview “Technical data / scope of delivery”,
“Electrics” section.
See “Operating instructions hydraulic module or
hydraulic module Dual or hydraulic tower Dual”.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Pressure relief
See “Operating instructions hydraulic module”,
“Safety assembly, expansion vessel” section.
Overow valve
Always use an overow valve for tanks integrated in
series to ensure the minimum ow rate of the heating
circuit volume ow through the heat pump. The overow
valve must be dimensioned so that the minimum ow
rate of the volume ow through the heat pump is
ensured when the heating circuit is shut off.
Buffer tank
The hydraulic connection of the heat pump requires a
buffer tank in the heating circuit.
Minimum size 60l.
Only one separating tank integration (vapour diffusion
insulated) is allowed for the LWD 50A/RX and LWD
70A/RX.
“Hydraulic connections” documents
Circulating pumps
IN THE HYDRAULIC MODULE.
“Hydraulic module or hydraulic module Dual”
operating manual.
Domestic water heating
Water heating with the heat pump requires an additional
hot water circuit, parallel to the heating circuit. When
installing, make sure that the domestic hot water charge
is not fed through the buffer tank of the heating circuit.
“Hydraulic connection” instructions.
Domestic hot water tank
If the heat pump is to be used for domestic water
heating, you must integrate special domestic hot water
tanks in the heat pump system. Choose a storage volume
so that the required quantity of hot water is available
even during a power cut.
NOTE.
The heat exchanger surface of the domestic hot
water tank must be dimensioned so that the he-
ating capacity of the heat pump is transferred
with minimum spread.
We offer a variety of domestic hot water tanks for you
to choose from. They are optimised for use with your
heat pump.
NOTE.
Integrate the hot-water tank in the heat pump
system according to the hydraulic diagram for
your system.
“Hydraulic connection” instructions.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
DAMAGE THAT CAN OCCUR IN CASE OF NON-
COMPLIANCE
- Malfunctions and the failure of components (e.g. pumps,
valves)
- Internal and external leaks (e.g. from heat exchangers)
- Cross-section reduction and blockaging of components
(e.g. heat exchanger, pipes, pumps)
- Material fatigue
- Gas bubbles and gas cushion formation (cavitation)
- Negative effect on heat transfer (formation of coatings,
deposits) and associated noises (e.g. boiling noises,
ow noises)
LIMESCALE – THE ENERGY KILLER
Filling with untreated drinking water inevitably leads to
the precipitation of all calcium as scale. The consequence:
limescale deposits form on the heat transfer surfaces of
the heating. The efciency falls and the energy costs rise.
A rule of thumb is that 1 millimetre of limescale deposit
causes an energy loss of 10%. In extreme cases it can
even cause damage to the heat exchangers.
WATER SOFTENING TO VDI 2035 – PART I
If the water is softened before the heating is lled, in
accordance with the VDI 2035 guidelines, no scale
can form. This effectively and permanently prevents
limescale deposits and the resulting negative effects on
the entire heating system.
CORROSION – AN UNDERESTIMATED PROBLEM
VDI 2035, Part II, deals with the problem of corrosion.
Softening the heating water can prove to be insufcient.
The pH value can signicantly exceed the limit of 10.
pH values higher than 11 can set in, which even damage
rubber seals. The VDI 2035, Part 1 guidelines are
fullled, however, VDI 2035, Part 2 suggests a pH value
between 8.2 and maximum 10.
If aluminium materials are used, which is the case in
many modern heating systems, a pH value of 8.5 must
not be exceeded, because otherwise there is a threat
of corrosion – and aluminium is attacked without the
presence of oxygen. Therefore, apart from softening
the heating ll and additional water, the heating water
should also be appropriately conditioned. This is the
only way to comply with the VDI 2035 requirements and
the recommendations and installation instructions of the
heat pump manufacturer.
Rinsing, lling and bleeding
the system
See “Operating instructions, hydraulic module
or hydraulic module Dual”.
CAUTION.
The system must be absolutely free from air be-
fore commissioning.
WATER QUALITY OF THE FILL AND ADDITIONAL WATER
IN HOT WATER HEATING SYSTEMS
ACCORDING TO VDI 2035 PART I AND II
Use of modern, energy-efcient heat pump systems
is becoming increasingly widespread. Their ingenious
technology enables these systems to achieve very good
efciencies. The decreasing space available for heat
generators has led to the development of compact
units with increasingly smaller cross-sections and high
capacities. This means the complexity of the systems and
the material diversity are also increasing, which plays an
important role especially in their corrosion behaviour.
The heating water not only affects the efciency of the
system, but also the life of the heat generator and the
heating components of a system.
The guide values of VDI 2035 Part I and Part II must
therefore be complied with as minimum requirements
for proper operation of the systems. Our practical
experience has shown that the safest and most trouble-
free running of the systems is achieved with so-called
low-salt operation.
VDI 2035 Part I gives important information and
recommendations regarding scaling and its prevention in
heating and domestic hot water heating systems.
VDI 2035 Part II primarily deals with the requirements
for reducing heating water corrosion in hot water
heating systems.
PRINCIPLES OF PART I AND PART II
The occurrence of scaling and corrosion damage in hot
water heating systems is low, if
- proper planning and commissioning is carried out
- the system is closed in corrosion terms
- adequately dimensioned pressurising is integrated
-
the guide values for the heating water are complied with
- and regular servicing and maintenance are carried out.
A system log should be kept, in which the relevant
planning data is entered (VDI 2035).

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Insulating the hydraulic
connections
Insulate the piping of the heating circuit and the
condensate pipe in the outdoor area so that they are
frost-proof, vapour-diffusion tight and UV resistant.
NOTE.
Insulate in accordance with applicable local stan-
dards and guidelines.
Check all hydraulic connections for leaks. Perform
leak test…
Insulate all connections and pipes of the heat circuit
(RX-variants vapour diffusion insulated).
Part 2 of VDI 2035 also points out the reduction in total
salt content (conductivity). The risk of corrosion is far
lower if deionised water is used than is the case if the
system is operated with salty, i.e. softened water.
Even if the water has been softened beforehand, it
contains dissolved, corrosion-promoting salts, which act
as electrolytes due to the use of different materials in
the heating system and therefore accelerate corrosion
processes. This can ultimately result in pitting.
Contamination and deposits in the heating circuit can
cause malfunctions
RINSE, FILL AND BLEED THE HEATING CIRCUIT AND
HOT WATER BUFFER TANK
To bleed the hot water tank, the heating circuit and hot
water circuit must be rinsed simultaneously.
ON THE SAFE SIDE WITH LOW-SALT OPERATION
The problems listed above do not occur at all with
low-salt operation, as neither corrosive salts such as
sulphates, chlorides and nitrates nor alkalising sodium
hydrogen carbonate are in the heating water. The
corrosive properties of deionised water are very low
and in addition, fur cannot form in the boiler. This is the
ideal approach for closed heating circuits, in particular,
because low oxygen input into the heating circuit can
also be tolerated.
In general, when the system is lled with deionised
water, the pH value sets itself within the ideal range due
to “self-alkalinisation”. If necessary, a pH value of 8.2
can be very easily alkalised by adding chemicals. In this
way, optimum protection of the entire heating system is
achieved.
MONITORING
Analytical recording and monitoring of the relevant
water values and the added active conditioning
substances is of decisive importance. Therefore, they
should be monitored regularly using appropriate water
test equipment.
Fill and bleed the heating circuit…
In addition, open the bleeding valve on the
condenser of the heat pump. Bleed condenser…

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Commissioning
WARNING!
The unit may only be started up if the
façade / facing panels are closed.
NOTE.
The commissioning has to be in the heating
mode.
Carry out a thorough installation check and work
through the general checklist…
Manufacturer’s homepage.
By checking the installation you prevent damage to
the heat pump system, which could be caused by
work carried out improperly.
Check that…
•clockwise rotary eld of the load power supply
(compressor) is ensured.
•The heat pump installation and assembly have
been carried out according to the requirements
of this operating manual.
•the electrical installation work has been
completed properly.
•The power supply for the heat pump must be
equipped with an all-pole automatic circuit-
breaker with at least 3 mm contact spacing to IEC
60947-2.
•The heating circuit is ushed, lled and thoroughly
vented.
•All valves and shut-off devices of the heating
circuit are open.
•All pipe systems and components of the system
are leaktight.
Carefully ll out and sign the completion report for
heat pump systems...
Manufacturer’s homepage.
Within Germany and Austria:
Send completion report for heat pump systems
and general checklist to the manufacturer’s factory
customer service department…
In other countries:
Send completion report for heat pump systems
and general checklist to the manufacturer’s local
p ar t ne r…
The heat pump system is commissioned by customer
service personnel authorised by the manufacturer.
There is a fee for starting up!
Dismantling
DANGER!
Risk of fatal injury due to electric shock!
Electrical connections may be installed
only by qualied electricians.
Before opening the unit, disconnect the
system from the power supply and secure
it from being switched back on!
WARNING!
Unit contains ammable refrigerants!
If refrigerant leaks, an explosion hazard is
caused. If this happens:
– Shut down unit.
– Notify the manufacturer’s authorised
service centre.
– Keep ignition sources away.
WARNING!
Only qualied heating or cooling system
technicians are allowed to remove the unit
from the system.
NOTE.
Any person who works on the refrigerant circuit
must have a qualication certicate issued by a
body accredited by the industry.
ATTENTION
Recycle or provide for proper disposal of unit
components, refrigerants and oil in accor-
dance with the applicable regulations, standards,
guidelines and directives.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
WITHDRAWAL FROM SERVICE
It is particularly important that the technician responsible
for the withdrawal from service work is familiar with all
details of the disposal equipment. We recommend that
all refrigerant be recovered.
Before disposing of the drained uids, take samples of
the oil and refrigerant, if the refrigerant is to be treated
for reuse.
NOTE.
It is important for electricity to be available
where the work is to be carried out.
a) Familiarise yourself with the units and their function.
b) Disconnect the unit to be disposed of from the power
supply.
c) Before starting the disposal procedure, ensure that:
- mechanical aids required for the transport of
refrigerant cylinders are available if necessary;
- personal protective equipment is available and is
properly used;
- the extraction process is continuously monitored
by a competent person;
- the disposal station and refrigerant cylinders
conform to the relevant guidelines and directives.
d) If possible, carry out a pump-down cycle.
e) If it is not possible to establish a vacuum, extract
through a collection pipe, so that refrigerant can be
removed from all parts of the system.
f) Ensure that the refrigerant cylinder is on the scales
before starting the extraction.
g) Switch on the disposal equipment and continue
according to the manufacturer’s instructions.
h) Ensure that recycling cylinders are not overlled
(never more than 80 % of the liquid ll quantity).
i) Never exceed the allowable operating pressure of the
recycling cylinder, not even for a short time.
j) When the recycling cylinders are properly lled
and the process has been completed, ensure that the
cylinders and units are immediately removed from the
system and all shut-off valves are closed.
k) Recovered refrigerant cannot be used in other
systems until it has been cleaned and examined.
MARKINGS
Units must be appropriately marked or labelled so that it
is clear to all that they have been withdrawn from service
and the refrigerant has been removed. This marking must
be dated and signed. Ensure that information regarding
ammable refrigerant is attached to the units.
RECOVERY/RECYCLING
If refrigerant is extracted for repair or withdrawal
from service purposes, ensure that this is done safely.
If coolant is transferred into cylinders, ensure that
only suitable refrigerant cylinders are used. Ensure
that a sufcient number of refrigerant cylinders are
available for the quantity in the system. All refrigerant
cylinders used must be intended for the refrigerant
to be extracted and marked accordingly (i.e. special
recycling cylinders for the recovery and recycling of
refrigerant). The refrigerant cylinders must have a safety
valve and securely attached shut-off valves and be in a
good condition. Empty recycling cylinders are evacuated
and should be cooled before the extraction process,
if possible. The disposal equipment must be in a good
condition and suitable for the recovery of ammable
refrigerants. Instructions on the individual recovery
procedure steps must be enclosed with the equipment.
In addition, calibrated scales must be available and must
also be in good condition. Hoses must be equipped with
leak-free couplings and be in good condition. Before
the disposal equipment is used, check that it is in good
condition, that it has been serviced at the specied
intervals and that the corresponding electrical devices
are sealed to prevent ignition in case of refrigerant
leaks. In case of doubt, contact the manufacturer for
advice. The recovered refrigerant must be returned to
the supplier in a proper recycling cylinder. Do not mix
refrigerants in refrigerant cylinders. If compressors or
compressor oil is to be disposed of, ensure that they are
evacuated with an adequate vacuum to ensure that there
is no longer any ammable refrigerant in the oil. Before
the compressor is returned to the manufacturer it must
be evacuated. This process may only be accelerated by
means of electrical heating of the compressor housing.
When oil is drained from a system, it must be done with
appropriate caution.

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Subject to change without notice | 83053500kUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Gerätebezeichnung
Heat pump type Brine/water ı Air/water ı Water/water • applicable ı — not applicable
Installation location Indoors ı Outdoors • applicable ı — not applicable
Conformity CE
Performance data Heating capacity/COP at
A7/W35 Standard point acc. to EN14511 2 compressors 1 compressor "kW ı …
kW ı …"
A7/W45 Standard point to EN14511 2 compressors 1 compressor "kW ı …
kW ı …"
A2/W35 Operating point to EN14511 2 compressors 1 compressor "kW ı …
kW ı …"
A10 / W3 5 Operating point to EN14511 2 compressors 1 compressor "kW ı …
kW ı …"
A-7/W35 Operating point to EN14511 2 compressors 1 compressor "kW ı …
kW ı …"
A-15/W65 2 compressors 1 compressor "kW ı …
kW ı …"
Limits of application Heating circuit °C
Heat source °C
additional operating points °C
Sound Sound pressure level inside (measured in free field at 1m distance around the machine) dB(A)
External sound pressure level (averaged in free field at 1m distance around air connections) dB(A)
Sound power inside dB
Sound power outside dB
Heat source Air volume flow at maximum external pressure m³/h
Maximum external pressure Pa
Heating circuit Volume flow: minimum flow rate ı nominal flow rate A7/W35 EN14511 ı maximum flow rate l/h
Heat pump pressure loss∆p ı volume flow bar ı l/h
Free compression heat pump ∆p ı volume flow bar ı l/h
Content of buffer tank l
3-way valve, heating/hot water ...
General unit data Dimensions (see dimensional drawing for the specified unit size) unit size
Total weight kg
Connections Heating circuit …
Domestic hot water circuit …
Refrigerant Refrigerant type ı Quantity … ı kg
Free cross section, air ducts mm
Cross section, condensate water hose / length from unit mm ı m
Electrics Voltage code ı three-phase circuit breaker heat pump **) see hydraulic module … ı A
Voltage code ı circuit breaker control voltage **) see hydraulic module … ı A
Voltage code ı circuit breaker electric heating element **) see hydraulic module … ı A
Heat pump Effective power consumption in standard point A7/W35 to EN14511: Power consumption ı current consumption ı cosφ kW ı A ı …
Maximum device current within the limits of application A
Starting current: direct ı with soft starter A ı A
Protection type IP
Output electric heating element 3 ı 2 ı 1 -phase kW ı kW ı kW
Components Heating circuit circulating pump at nominal flow rate: max. power consumption ı current consumption kW ı A
Safety equipment Safety assembly heating circuit ı Safety assembly heat source in scope of delivery: • yes — no
Heating and heat pump regulator Included in scope of delivery: • yes — no
Control and sensor wire Included in scope of delivery: • yes — no
Power cable to unit Included in scope of delivery: • yes — no
Electronic soft starter integrated: • yes — no
Expansion vessels Heating circuit: Scope of delivery ı Volume ı Initial pressure • yes — no ı l ı bar
Overflow valve integrated: • yes — no
Vibration decouplers Heating circuit Included in scope of delivery: • yes — no
UK813517
*) depending on component tolerances and flow **) comply with local regulations n.n. = not detectable w.w. = optional
¹) hot water return flow ²) hot water forward flowf
Technical data / scope of delivery