alphainnoTec LWD 50A User manual

UK
83053500mUK
Air/Water Heat Pumps
Dual / Outdoor installation
Operating Manual
LWD 50A • LWD 70A • LWD 90A
LWD 50A/RX • LWD 70A/RX

2Subject to change without notice | 83053500mUK | ait-deutschland GmbH
1 Please read rst
This operating manual provides important informa-
tion on the handling of the unit. It is an integral part of
the product and must be stored so that it is accessi-
ble 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 us-
ers 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
di󰀨erent models of the unit, always comply with the
parameters for the respective model.
This operating manual is intended only for persons as-
signed to work on or operate the unit. Treat all con-
stituent parts condentially. The information contained
herein is protected by copyright. No part of this man-
ual 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.
2 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 result‑
ing 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.
IMPORTANT
Indicates a potentially dangerous situation,
which could result in property damage.
NOTE
Emphasised information.
Flammable materials
Dangerous electrical voltage
9Prerequisite for an action.
►Single-step instruction for action.
1., 2., 3., … Numbered step within a multi-step in-
struction for action. Adhere to the given se-
quence.
●List.
Reference to further information elsewhere
in the operating manual or in another docu-
ment.
€ENERGY SAVING TIP
Indicates suggestions that help to save en-
ergy, raw materials and costs.

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Contents
1 Please read rst ............................................ 2
2 Symbols ........................................................... 2
3 Intended use ................................................... 4
4 Disclaimer ....................................................... 4
5 EC conformity ................................................ 4
6 Safety ............................................................... 4
7 Contact ............................................................. 6
8 Warranty / Guarantee .................................... 6
9 Disposal ........................................................... 6
10 Operating principle of heat pumps ........... 6
11 Area of utilisation ........................................... 6
12 Heat metering................................................. 6
13 Operation ......................................................... 6
14 Care of the unit .............................................. 6
15 Maintenance of the unit ............................... 7
15.1 Annual maintenance ................................. 7
15.2 Cleaning and ushing of unit components 7
16 Malfunctions ................................................... 7
17 Scope of delivery .......................................... 8
17.1 Main components ...................................... 8
18 Installation and assembly ........................... 9
18.1 Installation site requirements .................... 9
18.2 Transport to installation location ............... 9
18.3 Preparing the installation, together with
the wall penetration ................................. 10
18.4 Installation with wall bracket ................... 10
18.5 Installation on oor bracket ..................... 10
18.6 Condensate drain ....................................11
18.7 Connection to the heating circuit .............11
19 Electrical connections ................................ 12
20 Pressure relief .............................................. 13
21 Overow valve ............................................. 13
22 Bu󰀨er tank ..................................................... 13
23 Circulating pumps ....................................... 13
24 Domestic water heating ............................. 13
25 Domestic hot water tank ........................... 13
26 Rinsing, lling and bleeding the system 14
27 Insulating the hydraulic connections ...... 15
28 Commissioning ............................................ 15
29 Dismantling ................................................... 16
29.1 Withdrawal from service ......................... 16
29.2 Markings ................................................. 17
29.3 Recovery / recycling ................................ 17
Technical data / scope of delivery .................. 18
LWD 50A – LWD 90A ....................................... 18
LWD 50A /RX– LWD 70A/RX .......................... 20
Performance curves .......................................... 22
LWD 50A Heating mode ................................... 22
LWD 70A Heating mode ................................... 23
LWD 90A Heating mode................................... 24
LWD 50A/RX Heating mode ............................ 25
LWD 50A/RX Cooling mode ............................ 26
LWD 70A/RX Heating mode ............................ 27
LWD 70A/RX Cooling mode ............................ 28
Dimensional drawings ....................................... 29
Installation plans ................................................. 30
Installation protection areas ............................. 30
Wall bracket installation plan
Wall feedthrough ..................................... 31
Floor bracket installation plan
Hydraulic connection pipe ....................... 32
Floor bracket installation plan
Wall feedthrough ..................................... 33
Floor bracket installation plan
Hydraulic connection pipe ....................... 34
Drilling pattern for wall bracket
Wall feedthrough ..................................... 35
Drilling pattern for wall bracket
Hydraulic connection pipe ....................... 36
View of foundation V3 with
Wall feedthrough ..................................... 37
View of foundation V4 with
hydraulic connection pipe ....................... 38
Minimum clearances ........................................ 39
Outdoor connection of condensate pipe .......... 40
Indoor connection of condensate pipe ............. 40
Coastal installation ........................................... 41
Circuit diagrams .................................................. 42

4Subject to change without notice | 83053500mUK | ait-deutschland GmbH
3 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.
 “Technical data / scope of delivery“, from
page 18
NOTE
Notify the responsible power supply company
of the use of a heat pump or heat pump sys-
tem.
IMPORTANT
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!
► When using the device, observe local regulations:
laws, standards and directives.
4 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 compo-
nents contrary to the instructions in this operat-
ing manual
● if work is improperly carried out on the unit and
its components
● if work is carried out on the unit which is not de-
scribed in this operating manual, and this work
has not been explicitly approved by the manu-
facturer 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
5 EC conformity
The unit bears the CE mark of conformity.
 EC declaration of conformity
(see operating manual for the hydraulic device).
6 Safety
The unit is safe to operate when used for its intended
purpose. 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.
The operating manuals supplied with the product are
intended for all users of the product.
The operation of the product via the heating and he-
at pump control and work on the product which is in-
tended for end customers / operators is suitable for all
age groups of persons who are able to understand the
activities and the resulting consequences and can car-
ry out the necessary activities.
Children and adults who are not experienced in hand-
ling the product and do not understand the necessa-
ry 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 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 hazard-
aware working.
► Only allow qualied personnel with “electrical”
training to carry out work on the electrics and
electronics.
► Only allow qualied, skilled personnel to do any
other work on the system, e.g.
● Heating installer
● Plumbing installer
● Refrigeration system installer (maintenance
work)

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Every person who carries out work on the unit must
comply with the applicable accident prevention and
safety regulations. This applies in particular to the
wearing of personal protective clothing.
During the warranty and guarantee period, service
work and repairs may only be carried out by personnel
authorised by the manufacturer.
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!
Existing earthing connections within housings or on
mounting plates must not be altered. If this should ne-
vertheless be necessary in the course of repair or as-
sembly work:
► Restore earthing connections to their original con-
dition after completion of the work.
WARNING
Observe safety labels on and in the unit.
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
IMPORTANT
For safety reasons:
Never disconnect the unit from the power
supply, unless the unit is being opened.
IMPORTANT
Install the heat pump only outdoors and op-
erate only with outside air as the heat source.
Do not restrict or block the air-conducting
sides.
 “Dimensional drawings”, page 29, and “Installa-
tion plans“, from page 30, for respective mode.
WARNING
Never switch on unit if façade parts on the
unit are removed.
IMPORTANT
It is not permitted to integrate the heat pump
in ventilation systems. The use of the cooled
air for cooling purposes is not permitted.
IMPORTANT
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 corro-
sive constituents!
Constituents (such as ammonia, sulphur,
chlorine, salt, sewage gases, ue gases…)
can cause damage to the heat pump, which
can lead to complete failure / irreparable
damage to the heat pump!
IMPORTANT
By cooling with low ow temperatures, con-
densate can be expected to form on the heat
distribution 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 appro-
priate 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 suita-
ble 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.
Decommissioning/draining the heating
If the system/heat pump is decommissioned or drained
after already being lled, it must be ensured that
the condenser and any heat exchangers have been
drained completely in the event of freezing tempera-
tures. Residual water in heat exchangers and con-
densers can result in damage to the components.

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► Completely drain the system and the condenser,
and open vent valves.
► Blow them clear with compressed air, if required.
7 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.com
8 Warranty / Guarantee
For warranty and guarantee conditions, please refer to
the purchase documents.
NOTE
Please contact your dealer concerning war-
ranties and guarantees.
9 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.
 “29 Dismantling”, page 16
10 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
11 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.
 “Technical data / scope of delivery“, from
page 18
12 Heat metering
 Operating manual for the heating and heat pump
regulator.
 Operating manual for the hydraulic device.
13 Operation
 Operating manual for the hydraulic device.
14 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.

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15 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).
IMPORTANT
Regularly check to ensure that the conden-
sate can drain out of the unit unobstructed.
To do this, regularly check the condensate
tray in the unit and the condensate drain for
dirt / blockages and if necessary clean.
Always regularly control for unimpeded air infeed ac-
cordingly. Constrictions or even blockages which, for
example occur
● when applying house insulation with polysty-
rene balls
●through packaging material (foils, lms, car-
tons etc.)
●through foliage, snow, icing or similar weather-
related deposits
● through vegetation (bushes, tall grass etc.)
● through air shaft covers (y protection screens
etc.)
and which must be prevented and/or removed imme-
diately.
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.
15.1 Annual maintenance
►Determine the quality of the heating water by anal-
ysis. In the event of deviations from the specica-
tions, take suitable measures without delay.
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 cir-
cuit must have a qualication certicate is-
sued by a body accredited by the industry.
15.2 Cleaning and ushing 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.
16 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.

8Subject to change without notice | 83053500mUK | ait-deutschland GmbH
17 Scope of delivery
1 bus cable, 1 load cable, 1 control cable.
Cable connected on heat pump side.
Extra box with:
1 Condensate pipe socket + 3 xing screws
1 Sealing plate
1 Long Torx bit for façade screws
NOTE
The outdoor sensor is included with the hy-
draulic module.
1. Inspect delivery for outwardly visible signs of
damage.
2. Check to make sure that delivery is complete.
Any defects or incorrect deliveries must be
claimed immediately.
 “Technical data / scope of delivery“, from
page 18
Functionally relevant accessories
IMPORTANT
Use only original accessories from the manu-
facturer 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.
Additional accessories
● Wall penetration with vibration insulation
● Wall bracket
● Floor bracket
● Vibration insulation
● Air / magnetic sludge separator
●Bu󰀨er 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, an
extension kit can be ordered.
17.1 Main components
1 evaporator
2 switch
3 fan
4 condenser
5 compressor

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18 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, or-
dinances and directives.
NOTE
Observe the sound levels of the respective
model.
 “Technical data / scope of delivery“, from
page 18, “Sound” section
18.1 Installation site requirements
9Perform installation outside buildings only.
9Clearance dimensions are met
 “Dimensional drawings”, page 29, and “In-
stallation plans“, from page 30, for respec-
tive model
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.
9Free air intake and blowing air are possible with-
out any air short-circuit.
9The surface is suitable for installation of the unit:
● The foundation is level and horizontal
● The surface and the foundation have a load-
bearing capacity su󰀩cient for the unit’s weight
9Ground surface in the air outlet area of the heat
pump is permeable to water
18.2 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 trans-
port.
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.
 “Technical data / scope of delivery“, from
page 18, “General unit data” section.
IMPORTANT
Never use components and hydraulic con-
nections on the unit for transport purposes.
IMPORTANT
Do not tilt the unit more than a maximum of
45° (in any direction).

10 Subject to change without notice | 83053500mUK | ait-deutschland GmbH
18.3 Preparing the installation,
together with the wall penetration
CAUTION
Several people are required to install the
unit.
9Clearance dimensions from the wall, from wall
openings, windows, light wells and similar were
complied.
 “Dimensional drawings”, page 29, “Installation
plans“, from page 30, and “Installation protec-
tion areas”, page 30, for 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.
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
If the wall penetration is not used, the bus ca-
ble 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 availa-
ble.
Always keep to the installation plan. Note and
keep to minimum spacings.
18.4 Installation with wall bracket
 Installation instructions wall bracket
 Wall penetration installation instructions
 “Installation plans“, from page 30
 “Drilling pattern for wall bracket wall feedthrough”,
page 35
 “Drilling pattern for wall bracket hydraulic connec-
tion pipe”, page 36
 “Minimum clearances”, page 39
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
18.5 Installation on oor 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.
 Installation instructions oor bracket
 Wall penetration installation instructions
 “Installation plans“, from page 30
 “View of foundation V3 with wall feedthrough”,
page 37
 “View of foundation V4 with hydraulic connection
pipe”, page 38
 “Minimum clearances”, page 39
NOTE
If installing with wall penetration, ensure the
correct distance from the wall is maintained.

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18.6 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 su󰀩cient to lay the condensate pipe vertically at
least 90 cm into the ground.
Use the screws provided to install the condensate
connection socket, included with the unit, to the
condensate drain at the underside of the unit.
1. Outdoors:
Connect the condensate pipe (wall penetration
accessory) to the condensate connection socket.
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 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.
IMPORTANT
Ensure adequate percolation of the dis-
charged condensate into the ground!
 “Outdoor connection of condensate pipe”,
page 40
2. Towards the inside of the building:
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.
 Wall penetration installation instructions
NOTE
If the condensate pipe is not laid to the in-
side, the openings in the wall penetration at
the front and back must be closed o󰀨 with the
plugs supplied.
 “Indoor connection of condensate pipe”,
page 40
18.7 Connection to the heating circuit
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.
1. If no wall duct is used, route the xed piping of the
heating circuit outdoors below the frost line.
2. Install shut-o󰀨 devices for the hot water outow
(forward ow) and hot water inow (return ow) on
the heat pump side.
IMPORTANT
Connect the unit to the heating circuit accord-
ing 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 ade-
quately dimensioned.
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

12 Subject to change without notice | 83053500mUK | ait-deutschland GmbH
19 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)!
IMPORTANT
Ensure clockwise rotary eld of the load
power supply (compressor).
Operation with incorrect rotary direction of
the compressor can cause serious, irrepara-
ble damage to the compressor.
IMPORTANT
The power supply for the heat pump must be
equipped with a three-phase automatic cir-
cuit-breaker with at least 3mm contact spac-
ing to IEC 60947-2.
Note the level of the tripping current.
 ““Technical data / scope of delivery“, from
page 18, “Electrics” section
 Operating manual for the hydraulic device
IMPORTANT
When installing the connections, always se-
cure the connections on the unit against
twisting, to prevent damage to the copper
pipes inside the unit.
3. Connect the unit to the xed piping of the heating
circuit via vibration decouplers (vibration installa-
tion - stainless steel corrugated pipes, accesso-
ry). You must install them to prevent the transfer
of structural borne sound to the xed piping.
NOTE
If an existing system is being replaced, the
old vibration decoupling may not be reused.
 Installation instructions vibration insulation
1 Connection, heating water outlet (forward
ow)
2 Connection, heating water inlet (return
ow)
3 Condensation water pipe
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.

13
Subject to change without notice | 83053500mUK | ait-deutschland GmbH
20 Pressure relief
 Operating manual for the hydraulic device
21 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 o󰀨.
22 Bu󰀨er tank
The hydraulic connection of the heat pump requires a
bu󰀨er tank in the heating circuit.
Minimum size 60l.
Only one separating tank integration (vapour di󰀨usion
insulated) is allowed for the LWD 50A/RX and LWD
70A/RX.
 Hydraulic connections documents
23 Circulating pumps
in the hydraulic module
 Operating manual for the hydraulic device
24 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 bu󰀨er tank of
the heating circuit.
 Hydraulic connection instructions.
25 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 domes-
tic hot water tank must be dimensioned so
that the heating capacity of the heat pump is
transferred with minimum spread.
We o󰀨er 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.

14 Subject to change without notice | 83053500mUK | ait-deutschland GmbH
26 Rinsing, lling and bleeding
the system
 Operating manual for the hydraulic device
IMPORTANT
The system must be absolutely free from air
before commissioning.
Unsuitable quality of the water for lling up
and replenishing the heating circuit
The e󰀩ciency of the system and the service 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, cal-
cium deposits will form as scale. Lime scale deposits
accumulate on the heat transfer surfaces of the heat-
ing. The e󰀩ciency is reduced and energy costs in-
crease. In extreme cases, the heat exchangers will be
damaged.
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 he-
ating water.
► Keep a system log for hot water heating systems
in which relevant planning data is entered (VDI
2035).
Antifreeze in the heating circuit
For air/water heat pumps installed outdoors, it is not
necessary to ll a water/antifreeze mixture into the he-
ating circuit.
The heat pumps have safety devices that prevent the
water from freezing, even when the heating is swit-
ched o󰀨. A prerequisite is that the heat pump remains
switched on and is not disconnected from the mains.
Should there be a risk of frost, the circulation pumps
are activated.
The following points must be observed if antifreeze is
added, depending on the concentration of the mixture:
● Heat output of the heat pump is reduced
● COP value becomes worse
● In the case of on-site circulating pumps, the deliv-
ery rate is reduced; in the case of integrated cir-
culating pumps, the specied free pressure drops
● The compatibility of the material of the compon-
ents used with the antifreeze mixture must be en-
sured
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.
Filling and bleeding the heating circuit
1. Fill the heating circuit. Bleed it at the highest point.
2. In addition, open the bleeding valve on the con-
denser of the heat pump. Bleed condenser.

15
Subject to change without notice | 83053500mUK | ait-deutschland GmbH
28 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.
1. 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 sup-
ply (compressor) is ensured
● The heat pump installation and assembly
have been carried out according to the require-
ments of this operating manual
● the electrical installation work has been com-
pleted 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 thor-
oughly vented
● All valves and shut-o󰀨 devices of the heating
circuit are open
● All pipe systems and components of the system
are leaktight
2. Carefully ll out and sign the completion report for
heat pump systems...
 Manufacturer’s homepage
3. Within Germany:
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
partner.
4. The heat pump system is commissioned by cus-
tomer service personnel authorised by the manu-
facturer. There is a fee for starting up!
27 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-di󰀨usion tight and UV resistant.
NOTE
Insulate in accordance with applicable local
standards and guidelines.
1. Check all hydraulic connections for leaks. Per-
form leak test.
2. Insulate all connections and pipes of the heat cir-
cuit (RX-variants vapour di󰀨usion insulated).
3. The device must be completely closed on all sides
to ensure rodent protection.

16 Subject to change without notice | 83053500mUK | ait-deutschland GmbH
29.1 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 re-
frigerant 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 con-
form 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-o󰀨 valves are closed.
k) Recovered refrigerant cannot be used in other
systems until it has been cleaned and examined.
29 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 cir-
cuit must have a qualication certicate is-
sued by a body accredited by the industry.
IMPORTANT
Recycle or provide for proper disposal of unit
components, refrigerants and oil in accord-
ance with the applicable regulations, stand-
ards, guidelines and directives.

17
Subject to change without notice | 83053500mUK | ait-deutschland GmbH
29.2 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.
29.3 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 su󰀩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-o󰀨 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!

18 Subject to change without notice | 83053500mUK | ait-deutschland GmbH
Model designation
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 DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A7/W45 Standard point acc. to DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A2/W35 Operating point according to DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A10/ W 35 Operating point according to DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A-7/W35 Operating point according to DIN EN14511-x: 2013 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 Internal sound pressure level (open air test field, distance of 1m around the engine, average) dB(A)
External sound pressure level (open air test field, distance of 1m around the air supplies, average) dB(A)
Sound power inside dB(A)
Sound power outside dB(A)
Heat source Air volume flow at maximum external compression m³/h
Maximum external pressure Pa
Heating circuit Volume flow: minimum flow rate ı nominal flow rate A7/W35 DIN EN14511-x: 2013 ı maximum flow rate l/h
Pressure loss heat pump ∆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 …
Heat source …
Refrigerant Refrigerant type ı Quantity … ı kg
Free cross section, air channels mm
Cross section, condensate water / length from unit mm ı m
Electric Voltage code ı all-pole circuit breaker heat pump **) … ı A
Voltage code ı circuit breaker control voltage **) … ı A
Voltage code ı circuit breaker electric heating element **) ı A
Heat Pump E󰀨ective power consumption in standard point A7/W35 according to DIN EN14511-x: 2013: 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 Circulating pump heating circuit at nominal flow rate: Power consumption ı current consumption kW ı A
Safety equipment Safety component heating circuit ı Safety component heat source Includ. in sc. of del.: • yes — no
Heating and heat pump regulator Includ. in scope of delivery: • yes — no
Control and sensor wire Includ. in scope of delivery: • yes — no
Power cable to unit Includ. in scope of delivery: • yes — no
Electronic soft starter integrated: • yes — no
Expansion vessels Heat source: Scope of delivery ı Volume ı Initial pressure • yes — no ı l ı bar
Overflow valve integrated: • yes — no
Vibration decouplers Heating circuit ı heat source Included in scope of delivery: • yes — no
UK813517b
*) depending on components tolerances and flow **) comply with local regulations n.n. = not detectable w.w. = to choice
¹) hot water return ²) hot water flow The performance data and the operating limits apply to clean heat exchangers
Technical data / scope of delivery

19
Subject to change without notice | 83053500mUK | ait-deutschland GmbH
LWD 70A
— ı • ı —
— ı •
•
—
8.5 ı 4.3
—
8.4 ı 3.5
—
7.7 ı 3.8
—
10. 5 ı 5.1
—
6.3 ı 3.2
—
—
20¹ – 62²
-20 – 35
A> -7 / 70²
—
45
—
57
3000
—
1200 ı 1600 ı 2000
0.055 ı 1600
— ı —
—
—
—
146
G1“
—
R290 ı 1.1
—
ı
—
—
—
2.0 ı 4.1 ı 0.71
5.5
— ı 22
24
— ı — ı —
— ı —
— ı —
—
•
•
•
— ı — ı —
—
—
813542c
LWD 50A
— ı • ı —
— ı •
•
—
7.1 ı 4.8
—
6.8 ı 3.8
—
5.6 ı 3.8
—
7.5 ı 5.0
—
4.6 ı 3.2
—
—
20¹ – 62²
-20 – 35
A> -7 / 70²
—
45
—
57
3000
—
900 ı 1200 ı 1500
0.066 ı 1200
— ı —
—
—
—
141
G1“
—
R290 ı 0.95
—
— ı —
—
—
—
1.5 ı 3.2 ı 0.66
4
— ı 20
24
— ı — ı —
— ı —
— ı —
—
•
•
•
— ı — ı —
—
—
81354c
LWD 90A
— ı • ı —
— ı •
•
—
10.1 ı 4.12
—
9.9 ı 3.50
—
9.0 ı 3.60
—
11. 3 ı 4.50
—
7.5 ı 3.12
—
—
20¹ – 60²
-20 – 35
A> -2 / 70²
—
50
—
62
3500
—
1600 ı 2000 ı 2500
0.076 ı 2000
— ı —
—
—
—
149
G1“
—
R290 ı 1.17
—
ı
—
—
—
2.5 ı 5.0 ı 0.72
7.0
— ı 24
24
— ı — ı —
— ı —
— ı —
—
•
•
•
— ı — ı —
—
—
813549a
Model designation
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 DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A7/W45 Standard point acc. to DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A2/W35 Operating point according to DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A10/ W 35 Operating point according to DIN EN14511-x: 2013 2 Compressors
1 Compressor
kW ı …
kW ı …
A-7/W35 Operating point according to DIN EN14511-x: 2013 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 Internal sound pressure level (open air test field, distance of 1m around the engine, average) dB(A)
External sound pressure level (open air test field, distance of 1m around the air supplies, average) dB(A)
Sound power inside dB(A)
Sound power outside dB(A)
Heat source Air volume flow at maximum external compression m³/h
Maximum external pressure Pa
Heating circuit Volume flow: minimum flow rate ı nominal flow rate A7/W35 DIN EN14511-x: 2013 ı maximum flow rate l/h
Pressure loss heat pump ∆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 …
Heat source …
Refrigerant Refrigerant type ı Quantity … ı kg
Free cross section, air channels mm
Cross section, condensate water / length from unit mm ı m
Electric Voltage code ı all-pole circuit breaker heat pump **) … ı A
Voltage code ı circuit breaker control voltage **) … ı A
Voltage code ı circuit breaker electric heating element **) ı A
Heat Pump E󰀨ective power consumption in standard point A7/W35 according to DIN EN14511-x: 2013: 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 Circulating pump heating circuit at nominal flow rate: Power consumption ı current consumption kW ı A
Safety equipment Safety component heating circuit ı Safety component heat source Includ. in sc. of del.: • yes — no
Heating and heat pump regulator Includ. in scope of delivery: • yes — no
Control and sensor wire Includ. in scope of delivery: • yes — no
Power cable to unit Includ. in scope of delivery: • yes — no
Electronic soft starter integrated: • yes — no
Expansion vessels Heat source: Scope of delivery ı Volume ı Initial pressure • yes — no ı l ı bar
Overflow valve integrated: • yes — no
Vibration decouplers Heating circuit ı heat source Included in scope of delivery: • yes — no
UK813517b
*) depending on components tolerances and flow **) comply with local regulations n.n. = not detectable w.w. = to choice
¹) hot water return ²) hot water flow The performance data and the operating limits apply to clean heat exchangers

20 Subject to change without notice | 83053500mUK | 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 heat optimised at
A7/W35 Standard point as per DIN EN14511-x: 2013 1 compressor kW ı …
A7/W45 1 compressor kW ı …
A2/W35 Operating point as per DIN EN14511-x: 2013 1 compressor kW ı …
A10/ W 35 Operating point as per DIN EN14511-x: 2013 1 compressor kW ı …
A-7/W35 Operating point as per DIN EN14511-x: 2013 1 compressor kW ı …
Performance data Cooling capacity/EER cool optimised at
A27/W18 1 compressor kW ı …
A27/W7 1 compressor kW ı …
A35/W18 1 compressor kW ı …
A35/W7 1 compressor kW ı …
Heating limits of application heating circuit (water) °C
Heat source (air) °C
additional operating points °C
Cooling limits cooling circuit (water) °C
Heat sink (air) °C
Sound Sound pressure level outside (averaged in open space at 1 m distance from the machine) dB(A)
Sound power level, outside dB
Heat source Air volume flow m³/h
Maximum external pressure Pa
Heating circuit Volume flow: minimum flow rate ı nominal flow rate A7/W35 DIN EN14511-x: 2013 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 all-pole circuit breaker heat pump **) see hydraulic module … ı A
Voltage code ı all-pole circuit breaker **) see hydraulic module … ı A
Voltage code ı electric heating element circuit breaker **) see hydraulic module … ı A
Heat pump E󰀨ective power consumption in standard point A7/W35 to DIN EN14511-x: 2013: Power consumption ı current consumption ı cosφ kW ı A ı …
Maximum machine current within the use limits A
Starting current: direct ı with soft starter A ı A
Degree of protection 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 component heating circuit ı Safety component heat source Included in scope of delivery: • yes — no
Heating and heat pump controller Included in scope of delivery: • yes — no
Control and sensor lead 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
*) depending on component tolerances and flow **) comply with local regulations n.n. = not detectable w.w. = optional
¹) hot water return ²) hot water flow The performance data and the operating limits apply to clean heat exchangers
Technical data / scope of delivery