alphainnoTec HMD 1/E User manual

UK
83053600iUK
Accessories for
Dual Air / Water Heat Pumps
Outdoor installation
Operating Manual
Hydraulic Module HMD 1/E
Hydraulic Module HMD 1/RE

2Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
Table of contents
1 About this operating manual ...................... 3
1.1 Validity....................................................... 3
1.2 Reference documents............................... 3
1.3 Symbols and markings.............................. 3
1.4 Contact...................................................... 4
2 Safety ............................................................... 4
2.1 Intended use ............................................. 4
2.2 Personnelqualications ............................ 4
2.3 Personal protective equipment ................. 4
2.4 Residual risks............................................ 5
2.5 Avoid damage to property......................... 5
3 Operation and care....................................... 5
3.1 Energy and environmentally-conscious
operation ................................................. 5
3.2 Care .......................................................... 6
4 Scope of supply............................................. 6
4.1 Accessories............................................... 6
4.2 Components of the unit............................. 7
5 Storage, transport, installation................... 8
5.1 Storage...................................................... 8
5.2 Unpacking and transport........................... 8
5.2.1 Transport with handcart ............................ 8
5.2.2 Carrying the unit........................................ 8
5.2.3 Unpacking ................................................. 8
5.3 Installation................................................. 9
6 Install the hydraulic connections............. 10
6.1 Heating circuit ..........................................11
6.2 Expansion vessel .....................................11
7 Electrical installation................................... 12
8 Control panel................................................ 15
9 Flushing,llingandventing ...................... 15
9.1 Heating water quality .............................. 15
9.2 Flushandlltheheatingand
domestic hot water charging circuit....... 15
10 Insulate hydraulic connections ................ 17
11 Overowvalve ............................................. 17
12 Volumetricowmeter/heatmeter ........ 18
13 Commissioning ............................................ 18
14 Maintenance................................................. 18
14.1 Maintenance as required ........................ 18
14.2 Yearly maintenance................................. 18
15 Faults.............................................................. 18
15.1 Unlock safety temperature limiter ........... 18
15.2 Manually unblock the circulating pumps . 19
16 Dismantling and disposal.......................... 19
16.1 Dismantling ............................................. 19
16.2 Disposal and recycling ............................ 19
16.2.1 Bu󰀨er(standby)battery......................... 19
Technicaldata/Scopeofsupply................... 20
HMD1/E........................................................... 20
HMD1/RE ........................................................ 21
Free pressing ...................................................... 22
Dimensioned drawings and drill patterns 23
HMD1/E........................................................... 23
HMD1/RE ........................................................ 24
Installation plans................................................. 25
Hydraulic integration.......................................... 26
Row tank .......................................................... 26
Separatebu󰀨ertank......................................... 27
UnitvariantR(cooling) ..................................... 28
Legend Hydraulic integration ........................... 29
Terminal diagram................................................ 30
Circuit diagrams.................................................. 31
HMD1/E........................................................... 31
HMD1/RE ........................................................ 33

3
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
1 About this operating manual
This operating manual is part of the unit.
►Before working on or with the unit, read the
operating manual carefully and follow it for all
activities at all times, especially the warnings and
safety instructions.
►Keep the operating manual to hand at the unit
and pass on to the new owner if the unit changes
hands.
►If you have any questions or anything is unclear,
ask the manufacturer’s local partner or the
factory’s customer service.
►Note and follow all reference documents.
1.1 Validity
Thisoperatingmanualreferssolelytotheunitidentied
bythenameplate( “Nameplate”,page8).
1.2 Reference documents
The following documents contain additional
information with regard to this operating manual:
●Planning & design manual, hydraulic integration
●Operating manual of the heat pump
●Operating manual of the heating and heat pump
controller
●Brief description of the heat pump controller
●Operating manual of the comfort board
(accessories)
1.3 Symbols and markings
Identicationofwarnings
Symbol Meaning
Safety-relevant information.
Warning of physical injuries.
Safety-relevant information.
Warning of physical injuries.
Flammablematerials/
ammable(primary)refrigerant
Safety-relevant information.
Warning of physical injuries.
Flammablematerials/
ammable(primary)refrigerant
Symbol Meaning
Safety-relevant information.
Warning of physical injuries.
Danger of fatal injury due to
electric current.
DANGER Indicates imminent danger resulting
in severe injuries or death.
WARNING Indicates a potentially dangerous
situation, which can result in severe
injuries or death.
CAUTION Indicates a potentially dangerous
situation, which can result in
moderate or minor injuries.
IMPORTANT Indicates a potentially dangerous
situation, which can result in
property damage.
Symbols in the document
Symbol Meaning
Informationforqualiedpersonnel
Informationfortheowner/operator
Requirement for action
Procedural instructions:
Single step action prompt
1., 2., 3., … Procedural instructions:
Numbered step within a multi-step
action prompt. Keep to the given
order.
Additional information, e.g. a tip on
making work easier, information on
standards
Reference to further information
elsewhere in the operating manual
or in another document
●Listing
Secure connections against twisting

4Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
1.4 Contact
Addresses for purchasing accessories, for service
cases or for answers to questions about the unit and
this operating manual can be found on the internet and
are kept up-to-date:
●www.ait-deutschland.eu
2 Safety
Only use the unit if it is in proper technical condition
and only use it as intended, safely and aware of the
hazards, and follow this operating manual.
2.1 Intended use
The unit is designed for household use and is solely
intended for the following purposes:
●Heating
● Cooling(reversible variant only)
●Domestic hot water preparation
►Intended use includes complying with the
operating conditions ( „Technical data /
Scope of supply“, from page20) as well as the
operating manual and observing and following the
reference documents.
►When using the local regulations note: laws,
standards, guidelines, directives.
All other uses of the unit are not as intended.
2.2 Personnelqualications
The operating manuals supplied with the product are
intended for all users of the product.
The operation of the product via the heating and heat
pump control and work on the product which is intend-
edforendcustomers/operatorsissuitableforallage
groups of persons who are able to understand the ac-
tivities and the resulting consequences and can carry
out the necessary activities.
Children and adults who are not experienced in han-
dling the product and do not understand the neces-
sary activities and the resulting consequences must
be instructed and, if necessary, supervised by persons
experienced in handling the product and who are re-
sponsible for safety.
Children must not play with the product.
Theproductmayonlybeopenedbyqualiedpersonnel.
All procedural instructions in this operating manual is
solelydirectedatqualied,skilledpersonnel.
Only qualied, skilled personnel is able to carry out
the work on the device safety and correctly. Interfer-
encebyunqualiedpersonnelcancauselife-threaten-
ing injuries and damage to property.
►Ensure that the personnel are familiar with the lo-
cal regulations, especially those on safe and haz-
ard-aware working.
► Ensurethatthepersonnelarequaliedtohandle
ammable(primary)refrigerant.
►Work on the refrigerating circuit may only be Work
on the refrigerating circuit may only be carried out
byqualiedpersonnelwithappropriatequalica-
tions for refrigeration system installation.
●Work on the electrics and electronics may only be
carried out by electrical technicians.
●Any other work on the system may only be car-
ried out by qualied personnel (heating installer,
plumbinginstaller).
►During the warranty and guarantee period, ser-
vice work and repairs may only be carried out by
personnel authorised by the manufacturer.
2.3 Personal protective equipment
During transport and work on the unit, there is a risk of
cuts due to the sharp edges of the unit.
►Wear cut-resistant protective gloves.
During transport and work on the unit, there is a risk of
foot injuries.
►Wear safety shoes.
When working on liquid-conveying lines, there is a risk
of injury to the eyes due to leakage of liquids.
►Wear safety goggles.

5
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
2.4 Residual risks
Injuries caused by electric shock
Components in the unit are energised with life-
threatening voltage. Before working on the unit:
►Disconnect unit from power supply.
►Secure unit against being switched back on again.
Existing earthing connections within housings or on
mounting plates must not be altered. If this should nev-
ertheless be necessary in the course of repair or as-
sembly work:
►Restore earthing connections to their original con-
dition after completion of the work.
Injuries caused by high temperatures
►Before working on the unit, let it cool down.
Safety instructions and warning symbols
►Observe the safety instructions and warning sym-
bols on the packaging and on and in the unit.
2.5 Avoid damage to property
Improper action
Requirements for minimum scale and corrosion
damage in hot water heating systems:
●Proper planning, design and commissioning
●Closed system with regard to corrosion
●Integration of an adequately dimensioned
pressure maintaining device
● Useofdemineralisedheatingwater(VEwater)or
water corresponding to the VDI 2035 norm
●Regular servicing and maintenance
If a system is not planned, designed, started up and
operated in accordance with the given requirements,
then there is a risk that the following damage and
faults will occur:
●Faults and the failure of components, e.g. pumps,
valves
●Internal and external leaks, e.g. from heat
exchangers
●Cross-section reduction and blockages in
components, e.g. heat exchanger, pipes, pumps
●Material fatigue
●Gas bubbles and gas cushion formation
(cavitation)
● Negativee󰀨ectonheattransfer,e.g.formationof
coatings, deposits, and associated noises, e.g.
boilingnoises,ownoises
►Note and follow the information in this operating
manual for all work on and with the unit.
Unsuitablequalityofthellandmake-up
water in the heating circuit
Thee󰀩ciencyofthesystemandtheservicelifeofthe
heat generator and the heating components depend
decisively on the quality of the heating water.
Whenthesystemislledwithuntreateddrinkingwater,
calcium and magnesium precipitate as mineral scale.
Lime scale deposits form on the heat transfer surfaces
oftheheating.Thee󰀩ciencydropsandenergycosts
rise. In extreme cases, the heat exchangers will be
damaged.
►Fill the system with deionised heating water
(VEwater)orwithwatercorrespondingtotheVDI
2035normonly(low-saltoperationofthesystem).
3 Operation and care
NOTE
The unit is operated via the control panel
of the heating and heat pump controller
(operating manual of the heating and heat
pumpcontroller).
3.1 Energy and environmentally-
conscious operation
The generally accepted requirements for energy-
conscious and environmentally-conscious operation
of a heating system also apply to use of a heat pump.
The most important measures include:
● Nounnecessarilyhighowtemperature
●No unnecessarily high domestic hot water
temperature
●Do not open windows with just a gap or tilt open
(continuousventilation); instead, open wide for a
shorttime(shockventilation)
●Always ensure that the controller settings are
correct

6Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
3.2 Care
Wipe down the outside of the unit only using a damp
cloth orcloth withmildcleaning product (washing-up
liquid, neutral cleaning agent). Never use any harsh,
abrasive, acid or chlorine-based cleaning products.
4 Scope of supply
1 Accessory package
2 Safety module
3 Hydraulic module
Accessory package:
1 Hangerbolts(M10)forwallbracket(3x)
2 Ballvalves(2x)
3 Flatgasket1“(2x)
4 Outdoor sensor
5 Nuts(M10),plainwashers(3each)
6 Anchorsforwallbracket(3x)
Screwsforstrainrelief(16x–notillustrated)
1. Inspect the delivery for outwardly visible signs of
damage.
2. Inspect the scope of supply for completeness.
Any defects or incorrect deliveries must be report-
ed immediately.
4.1 Accessories
The following accessories are available for the unit
through the manufacturer's local partner:
●Comfort board with various additional functions
●Room control panel for controlling the main
functions from the living room
●Domestic hot water tank
●Bu󰀨ertank

7
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
4.2 Components of the unit
Di󰀨erentvariantsofthehydraulicmoduleareavailable:
HMD1/E HMD1/RE
1Shut-o󰀨ballvalvewithllinganddraintap
*)
2Heatingwateroutlet(supply)
3Enery-e󰀩cientcirculatingpumpheatingcircuit
4 Expansion vessel
5Volumetricowmeter
6Electric heating element
7Air separator
8Heatingcircuitsafetymodule(insulated)
*)
9Control panel
10 Comfortboard(accessory)
11 Electrical switch box
12 Heatingwaterinlet(supply)
13 Shut-o󰀨ballvalvewithdraintapandventing
*)
*) to be mounted at the installation location

8Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
Nameplate
A nameplate is attached to the outside of the unit at
the factory.
The nameplate contains the following information at
the very top:
●Model, item number
●Serial number
The nameplate also contains an overview of the most
important technical data.
5 Storage, transport, installation
5.1 Storage
►Store unit protected against:
● Moisture/damp
●Frost
●Dust and dirt
5.2 Unpacking and transport
Notes on safe transport
Theunitisheavy(refer to „Technicaldata/Scopeof
supply“, from page20). There is a risk of injuries or
damage to property if the unit falls down or overturns.
The hydraulic connections are not designed for
mechanical loads.
►Do not lift or transport the unit by the hydraulic
connections.
►Transport the unit preferably with a handcart or by
carrying.
NOTE
To prevent damage during transport, always
transporttheunittonalinstallationlocation
in its original packaging.
5.2.1 Transport with handcart
5.2.2 Carrying the unit
►Carry the packed unit with 2 persons to the
installation location.
5.2.3 Unpacking
1. Remove plastic lms and cardboard. Ensure that
you do not damage the unit.
2. Dispose of the transport and packaging material
in an environmentally friendly way and in
accordance with local regulations.

9
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
5.3 Installation
Installation location
IMPORTANT
Install the unit inside buildings only.
The installation area must be frost-free and dry. It must
fulltherelevantlocalregulations.
Observe safety and service clearances.
“Installation plans“, page 25 and „Dimensioned
drawings and drill patterns“, from page 23
Mount the unit
Example of installation:
1 Bu󰀨ertan
2 Hydraulic module
3 Domestic hot water tank
IMPORTANT
The load-bearing capacity of the wall must be guar-
anteed.
1. Align drill pattern, mark drill holes and drill.
Observe the instructions on the drill pattern.
2. Insert the plugs and hanger bolts supplied into the
holes drilled.
The plugs supplied are only suitable for use with
the following types of walls:
●Concrete
●Solid lightweight concrete blocks
●Cavity block made of lightweight concrete
●Cellular concrete
●Prestressedconcrete-hollowceiling/oorslabs
●Natural stone with dense, close-grained micro-
structure
●Solid calcium silicate blocks
●Perforated calcium silicate blocks
●Solid bricks
● Verticallyperforated(honeycomb)bricks
● Hollowoors/ceilingsmadeofclaybricks,con-
crete or similar
●Solid gypsum boards
● Gypsumboardsandgypsumbreboards
●Particle boards
The board material must be dimensioned with
su󰀩cientthicknesstoensuresecurexing.
Appropriate xing material must be provided on site
for other types of wall constructions.
3. Takeo󰀨thefronthood.
IMPORTANT
The unit must neither be lifted up nor transported
by the switch box.

10 Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
4. Mount the unit to the wall.
IMPORTANT
The gap between the unit and the wall helps back
ventilation.Itmaynotbesealedorclosedo󰀨.
5. Lay cable glands at a distance of at least 2cm
from the unit.
►On the inside of the front hood, there is a circum-
ferential groove(①). Lock the front hood to the
grooveinthetongue(②)ontherearpanel.
21
6 Install the hydraulic
connections
NOTE
The safety valve that is integrated or included
in delivery has a tolerance of plus / minus
10% for the set pressure. If local regulations,
laws, standards or directives require a
smaller tolerance range, the safety valve
must be replaced on site with a safety valve
that meets the requirements.
IMPORTANT
Avoidopen heatingsystemsand/ or heatingsys-
temsthatarenotoxygendi󰀨usion-tight.
If this is not possible, a system separation must be
installed.
Depending on the dimensioning of the heat ex-
changer and the additionally required circulation
pump, the system separation worsens the energy
e󰀩ciencyofthesystem.
IMPORTANT
Dirtanddepositsinthe(existing)hydraulicsystem
can cause damage to the heat pump.
► Ensure that a air / magnetic sludge separator is
installed in the heating circuit.
►Rinse the hydraulic system thoroughly prior to es-
tablishing the hydraulic connection of the heat
pump.
IMPORTANT
Damage to the copper pipes due to unacceptable
loading!
►Secure all connections against twisting.
Cross-sections and lengths of the pipes for the
heating circuit are adequately dimensioned.
In
doing so, always that the connection pipework
between the heat pump and hydraulic module are
also taken into account
The free pressing of the recirculating pump
produces at least the minimum throughput
requiredfortheunittype(refer to “Free pressing”,
page22).
► Route all hydraulic connections as xed piping
and attach them via a xed point to the wall or
ceiling at a maximum distance of 20 cm from the
centre of the respective unit connection.
►Insert the vent at the highest point of the heating
circuit.
► Takeo󰀨thefronthood.

11
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
6.1 Heating circuit
Safetymoduleandshut-o󰀨ballvalves
1. Take the safety module and the shut-o󰀨 ball
valvesout oftheaccessorypackand tthem to
the connections provided. Use seals from the ac-
cessory pack.
Safety module For reversible variant:
1.1. Mount thread covers on the hanger bolts.
1.2. Screw adapter with safety component onto
hydraulic module.
1.3. Following the leak test, use insulation inclu-
ded in the scope of supply to insulate adapter
and safety component.
2. Lay the safety discharge of the safety valve into
the drain via a funnel waste trap according to the
relevant standards and guidelines.
It is essential that the safety discharge is connect-
ed
Heating water inlet and outlet
1. Establish hydraulic connection to the unit.
2. Establish hydraulic connection to the heating cir-
cuit/domestichotwatertank.
Position of the connections: „Dimensioned draw-
ings and drill patterns“, from page 23
6.2 Expansion vessel
The expansion vessel for the heating circuit is
integrated. Always check whether the size of the
expansion vessel is large enough for the system.
If necessary, an additional expansion vessel must
be installed on site in accordance with the relevant
standards and guidelines.
NOTE
The admission pressure of the expansion
vessel must be adjusted to the system
(approx. 0.5 bar less than the system lling
pressure)in accordance with thecalculation
totherelevantstandards(EN12828).

12 Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
7 Electrical installation
7.1 Connect the electrical cables
IMPORTANT
Irreparable damage to the compressor due to
wrongrotatingeld(onlyappliestounitswith400V
connection).
► Ensurethatthereisaclockwiserotatingeldfor
the compressor load infeed.
Basic information on the electrical connection
● The specications of the local energy supply
company may apply to electrical connections
●Fit the power supply for the heat pump with an
all-pole circuit breaker with at least 3 mm contact
spacing(perIEC60947-2)
●Note the level of the tripping current
●Comply with the electromagnetic compatibility
regulations(EMCregulations)
●Lay unshielded power supply cables and shielded
cables(buscable)su󰀩cientlyfarapart(>100mm)
●Maximum line length: 30m
Example:HMD1/E
1 Terminal strip, external sensors
2 230 V inputs
3 Control voltage
4 Bus cable connection
5 Terminal strip, power supply cable
- Heat pump
- Heating element
6 Cable routing
7 Returnowsensor
7.2 Electrical connection
The electrical connection between the heat pump and
hydraulic module is made using the 3 pre-installed ca-
bles on the heat pump.
The hydraulic module is connected electrically on site
according to the following scheme:
5
1 Heat pump
2 Load cable compressor
3 Control voltage
4 LIN-Bus(shielded)
5 Hydraulic module
6 Load line electric heating element
7 Control voltage
8 Load cable compressor
9 Sub-distribution
1. Lay empty conduits from the heat pump to the in-
side of the building and seal the empty conduits
ontheunitside.Orusethewallduct(accessory).
NOTE
If the wall duct is used, the necessary di-
stance from adjacent conduits and cables is
ensured.
2. Feed the three connection cables from the heat
pump through the empty conduits or through the
three ducts of the wall duct. Use lubricant.
807318
55
40
80
9
D
E
11
D
O
E
O
14
15
2x F
2x H
2x R
P
C
12
8b
90°
90°
90°
O
10
O
3Ph/400V
a
b
16
13
2x U
17
i
!
i
!
i
V
V

13
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
3. Fasten the return sensor (①) to the heat-conduct-
ing pipe of the return line leading to the heat pump
(②) using cable ties and thermal compound.
4
2
3
1
1 Return sensor on hydraulic module
2 Return to heat pump
3 Supply from heat pump
4 Supplytoheatingcircuit/domestichotwater
tank
4. Lay the sensor cable to the hydraulic module.
5. Strip the load, control and sensor cable, the ca-
ble for the EVU blocking time as well as the ca-
bles of external loads before feeding them into the
switchbox(strippinglengthofeachoftheindivid-
ualwires:6mm).
6. Feed the cables through the cable gommets (⑤) in-
to the switch box .
5
5
7. Push the shielding of the stripped bus cable back-
wards over the cable sheath.
8. Insert the end of the insulated cable with the
shield into the shield terminal.
9. Feed the end with the individual cores through
one of the two grommets.
Core assignment:
1 12 V
2 LIN
3 GND
10. Pullo󰀨thegreenbusconnectorfromthebottom
of the control element and connect the cable as
shown in the terminal diagram, then re-attach the
connector to the control element.
11. Make further electrical connections in accordance
with the terminal diagram.
“Terminal diagram”, page 30

14 Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
NOTE
The control panel of the heating and heat pump
controller can be connected to a computer
or network using a suitable network cable,
enabling the heating and heat pump controller
to be controlled remotely from there.
If such a connection is desired, route a
shielded network cable (⑨, category 6, with
RJ45connector)throughtheelectricalswitch
box and plug it to the corresponding socket
of the control panel.
9
1 2 43
1 RS485 for connecting the room control unit
RBE(accessory)
2 RJ45 for network cable connection
3 RS485 LIN bus cable connection to the control
board
4 RJ45 connection Modbus cable to Modbus
distributor.
12. Insert all cables introduced into the switch box in-
to the cable ducts in the switch box, route them
throughthestrainreliefs(⑩)andscrewtheminto
the strain reliefs.
10
NOTE
The integrated electric heating element is
connected at 6kW in the factory. At contactor
Q, it is possible to select 4kW = 2 phase
operation.Disconnect Q5/6 forthis. Or2kW
= 1 phase operation. Disconnect Q5/6 and
Q5/4forthis.
Disconnected cables must be furnished with
screw terminals. Only the phases cited above
may be disconnected (safety temperature
limiter).
Q
13. Close the electrical switch box by re-attaching the
side cover.

15
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
8 Control panel
The control panel is pre-assembled at the factory.
If the control panel needs to be removed for any rea-
son:
1. Takeo󰀨thefronthood.
2. Disconnect or unplug all connections at the bottom.
3. Lifto󰀨thecontrolpanel.
Reattaching the control panel:
4x
9 Flushing,llingandventing
9.1 Heating water quality
NOTE
For detailed information refer, among other
things, to the VDI Guidelines 2035 “Vermei-
dung von Schäden in Warmwasserheizanla-
gen” (preventing damage in hot water heat-
ingsystems).
1. Ensure that the ph-value of the heating water is
between 8.2 – 10, for aluminium materials be-
tween8.2–9.
Ideally, the pH value should already be in the re-
quiredrangeafterlling.After6weeksatthelat-
est, it must have adjusted to the required range.
2. Ensure that the electrical conductivity is
<100μS/cm.
NOTE
If the required water quality is not achieved,
consult a company specialising in the treat-
ment of heating water.
3. 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
4. Keep a system log for hot water heating systems
in which relevant planning data and the water
qualityareentered(VDI2035).
9.2 Flushandlltheheatingand
domestic hot water charging
circuit
Outlet pipe of the safety valve is connected.
►Ensure that the set pressure of the safety valve is
not exceeded.
IMPORTANT
Flushtheheatingcircuitonlyinitsowdirection.

16 Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
NOTE
The venting program on the controller can
also be used to support the ushing and
venting process. It is possible to control
individual recirculating pumps and even
the changeover valve through the venting
programme. As a result it is not necessary to
remove the valve motor.
1. Vent the system at the highest point.
2. Pullo󰀨theU-clip(①) on the back of the valve mo-
tor (②) onthe3-wayswitchingvalve(③, accesso-
ry)upwards.
23
1
3. Carefully pull the valve motor (②) forward from
the 3-way switching valve (③).
2
3
4. Turn the spindle of the 3-way switching valve so
that the rounded side of the spindle points in the
direction of marking A of the connections of the
3-way switching valve.
A
B
5. Flush the domestic hot water charging circuit for
approx. 1 minute.
6. Turn the spindle so that the rounded side of the
spindle points in the direction of marking B of the
connections of the 3-way switching valve.
7. Flush heating circuit thoroughly, until no more air
is discharged.
8. Position the valve motor (②) on the 3-way
switching valve (③).
2
3
9. Insert the U-clip (①) into the back of the valve
motor (②).
2
1
10. Ensure that the U-clip has latched into position
correctly:
Valve motor sits securely on the 3-way switch-
ing valve.
Both prongs of the U-clip sit on the lug.
The tips of the U-clip are not visible more than
approx. 2 mm.

17
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
Example: Scheme heating variant
A
H
000
J
offen
zuoffen
1 Return, domestic hot water
2 Return, hot water
3 Supply,hotwater/domestichotwater
4 Filling stop cock
5 Heat pump
6 Drain
Example: Scheme heating variant
A
H
000
J
zu offen
zu
1 Return, domestic hot water
2 Return, hot water
3 Supply,hotwater/domestichotwater
4 Filling stop cock
5 Heat pump
6 Drain
11. Swap the hoses at the lling and draining stop
cocksandushthecondenseroftheheatpump
via the return.
12. Open the additional vent valve at the condenser
of the heat pump. Vent the condenser and then
close the vent valve again when fully vented.
  “Switching valve” operating manual
10 Insulate hydraulic connections
Insulate hydraulic lines in accordance with local
regulations.
1. Openshut-o󰀨devices.
2. Perform a pressure test and inspect for leaks.
3. Insulate external piping on site.
4. Insulateallconnections,ttingsandpipes.
In(R)variantvapourdi󰀨usiontight
11 Overowvalve
Operating manual of the heat pump

18 Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
12 Volumetricowmeter/
heat meter
Thevolumetricowmeter/heatmeter(①)integrated
is used to measure the heat quantity generated by the
heating system and made available for domestic hot
water preparation and building heating.
1
Thevolumetricowmeter/heatmetermeasuresow
and temperature di󰀨erence in the charging circuit.
The measuring ranges are set in the heating and heat
pump controller. Measured values can be read out on
the control panel display.
Operating manual of of the heating and heat
pump controller
13 Commissioning
Operating manual of the heating and heat pump
controller
Operating manual of the heat pump
14 Maintenance
NOTE
We recommend that you sign a maintenance
agreement with an accredited heating company.
14.1 Maintenance as required
► The components of the heating circuit (valves,
expansion vessels, circulating pumps, lters, dirt
traps)shouldbeinspectedorcleanedasneeded,
attheveryleastannually,byqualiedpersonnel
(heatingorcoolingsystemengineers).
14.2 Yearly 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.
►Check all installed dirt traps for dirt and clean
them if necessary.
15 Faults
►Read out the cause of the fault via the diagnostics
program of the heating and heat pump controller.
►Contact the local partner of the manufacturer or
the factory's customer service. Have the fault
messageand unitnumber (refer to “Nameplate”)
to hand.
15.1 Unlock safety temperature limiter
A safety temperature limiter is installed in the electric
heating element. If the heat pump fails or there is air in
the system:
►Check whether the reset button (②) in the centre
of the safety temperature limiter (①) has tripped.
HMD1/E

19
Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
HMD1/RE
►If the reset button ( ② )has tripped, press it again.
►If the safety temperature limiter trips again, con-
tact the local partner of the manufacturer or the
factory‘s customer service.
15.2 Manually unblock the
circulating pumps
Circulating pumps can block due to sediments or
longer standstill periods. This blockage can be re-
moved manually.
1. Undodeatingscrew(①)inthemiddleofthecir-
culation pump of the heat source.
2. Insert a screwdriver into the opening and release
the blocked shaft in the direction of rotation of the
circulating pump.
3. Reinsertandtightenthedeatingscrew(①).
16 Dismantling and disposal
16.1 Dismantling
►Separate components by their materials.
16.2 Disposal and recycling
►Recycle or ensure proper disposal of unit
components and packaging materials in
accordance with local regulations.
16.2.1 Bu󰀨er(standby)battery
1. Use a screwdriver to push out the bu󰀨er battery
on the processor board of the control panel.
2. Dispose of the bu󰀨er battery (type: CR2032,
Lithium)inaccordancewithlocalregulations.

20 Subject to technical amendments without prior notice | 83053600iUK | ait-deutschland GmbH
Unit designation HMD 1/E
Accessory for heat pump model
LWD50A-LWD90AıLWD50ARX-LWD70ARX •applicableı—notapplicable •ı—
Functionally necessary •applicableı—notapplicable •
Installation location
IndoorsıOutdoors •applicableı—notapplicable •ı—
Maximum indoor temperature °C —
Maximum relative humidity %—
Conformity CE •
Heating circuit
Heatingcircuite󰀩ciencypump integrated:•yes—no •
Heatingcircuitfreecompression∆p(factorysetting)ıMaximumfreecompression∆pmaxıVolumeow barıbarıl/h 0,46ı0,54ı1600
Volumeow:minimumowrateımaximumowrate l/h 900ı2000
max. permissible operating pressure bar 3
IntegratedexpansionvesselıVolumeıInitialpressure •yes—noılıbar •ı12ı1,5
Bu󰀨ertank integrated:•yes—no —
Heatmeteringand/orowratedisplay integrated:•yes—no •
General unit data
Housingdimensions(HeightıWidthıDepth) mmımmımm 695ı550ı330
Total weight kg 25
Connections
Heatingwaterinlet(forwardflow) …R 1" internal
Hotwateroutflow(forwardflow) …R 1" internal
Electrics
Voltagecodeıthree-phasecircuitbreakerheatpump**) …ıA 3~/N/PE/400V/50HzıC16
Voltagecodeıcircuitbreakercontrolvoltage**) …ıA 1~/N/PE/230V/50HzıB16
Voltagecodeıcircuitbreakerelectricheatingelement**) …ıA 3~/N/PE/400V/50HzıB10
Protection type IP 20
Outputelectricheatingelement3ı2ı1phase kWıkWıkW 6ı4ı2
Heatingcircuitpump:maximumpowerconsumptionıcurrentconsumption kWıA 0,07ı0,31
Safety equipment
SafetyassemblyheatingcircuitıSafetyassemblyheatsource inscopeofdelivery:•yes—no •ı—
Heating and heat pump regulator inscopeofdelivery:•yes—no •
Overowvalve integrated:•yes—no —
**)complywithlocalregulations 813305b
Technicaldata/Scopeofsupply HMD1/E