alphainnoTec LW 100H User manual

We reserve the right to modify technical specifications without prior notice.
83054300dUK © ait-deutschland GmbH
Translation of the original instruction manual
HEAT PUMPS
Operating Manual
Inside installation
A IR / WATER
UK
LW 101
LW 121
LW 100H

2
We reserve the right to modify technical specifications without prior notice.
83054300dUK © 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 operators of the
unit.
Read the operating manual before working on or oper-
ating 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
case of questions or uncertainty, contact the factory
customer service department or the manufacturer’s
local service 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 information 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 techni-
cians.
DANGER!
Indicates a immediate danger of serious
injuries or death.
WARNING!
Indicates a potentially dangerous situa-
tion that could result in serious injuries or
death.
CAUTION!
Indicates a potentially dangerous situation
that could result in medium or slight inju-
ries.
ATTENTION .
Indicates a potentially dangerous situation, which
could result in property damage.
NOTICE.
Emphasised information.
€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 manufac-
turer.

3
Contents
INFORMATION FOR OPERATORS AND
QUALIFIED SPECIALISTS
PLEASE READ FIRST..................................................................2
SYMBOLS .....................................................................................2
INTENDED USE..........................................................................4
EXCLUSION OF LIABILITY......................................................4
EC CONFORMITY .....................................................................4
SAFETY.........................................................................................4
CUSTOMER SERVICE ................................................................5
WARRANTY
/ GUARANTEE..................................................5
DISPOSAL ....................................................................................5
INFORMATION FOR OPERATORS
FUNCTIONING PRINCIPLE OF HEAT PUMP SYSTEM ......6
AREA OF UTILISATION............................................................6
HEAT QUANTITY RECORDING ............................................6
OPER ATIO N ................................................................................6
CARE OF THE UNIT..................................................................7
MAINTENANCE OF THE UNIT...............................................7
Cleaning and flushing of unit components........................7
MALFUNCTIONS.......................................................................7
INSTRUCTIONS FOR QUALIFIED TECHNICIANS
SCOPE OF DELIVERY ................................................................8
INSTALLATION AND ASSEMBLY...........................................9
Installation location..............................................................9
Transport to installation location......................................9
Installation............................................................................11
Mounting the air ducts.......................................................11
Installation / connection to heating circuit ...................14
Condensate discharge ........................................................15
PRESSURE RELIEF.....................................................................16
OVERFLOW VALVE..................................................................16
BUFFER TANK...........................................................................16
CIRCULATING PUMPS ...........................................................16
WATER HEATING ....................................................................16
HOT-WAT ER TANK .................................................................16
ELECTRICAL CONNECTIONS .............................................17
FLUSHING, FILLING AND BLEEDING THE SYSTEM.......18
Water quality of the fill and additional water in hot
water heating systems .................................................18
INSULATING THE HYDRAULIC CONNECTIONS ..........20
INSTALLATION OF THE CONTROL ELEMENT ...............20
INSTALLATION AND REMOVAL OF THE SCREEN.........21
COMMISSIONING ...................................................................22
Safety temperature limiter................................................23
DISMANTLING .........................................................................23
TECHNICAL DATA / SCOPE OF DELIVERY
LW 101 – LW 100H ............................................................24
PERFORMANCE CURVES
Heating capacity/COP / power consumption /
Heat pump pressure loss
LW 101..................................................................................26
LW 121 ..................................................................................27
LW 100H ..............................................................................28
DIMENSIONAL DRAWINGS AND INSTALLATION PLANS
Dimensional drawings LW 101 • LW 100H ....................29
Installation plans LW 101 • LW 100H
Installation plan Version 1.................................................30
Installation plan Version 2.................................................31
Installation plan Version 3.................................................32
Installation plan Version 4.................................................33
Dimensional drawings LW 121..........................................34
Installation plans LW 121
Installation plan Version 1.................................................35
Installation plan Version 2.................................................36
Installation plan Version 3.................................................37
Installation plan Version 4.................................................38
TERMINAL DIAGRAMS
LW 101 – LW 121................................................................39
LW 100H ............................................................................. 40
CIRCUIT DIAGRAMS
LW 101 – LW 121................................................................41
LW 100H ............................................................................. 44
APPENDIX
EC DECLARATION OF CONFORMITY..............................47
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83054300dUK © ait-deutschland GmbH

4
We reserve the right to modify technical specifications without prior notice.
83054300dUK © ait-deutschland GmbH
Intended use
The unit may be used only for the intended purpose.
This means:
•for heating.
•for heating hot water.
The unit may be operated only within its technical
parameters.
Overview "Technical data / scope of delivery“.
NOTICE.
Notify the responsible power supply company of
the use of a heat pump or heat pump system.
ATTE NTION
The unit is not suitable for use in IT network
systems.
Exclusion of liability
The manufacturer will not be liable for damage resulting
from unauthorised use of the unit.
The manufacturer’s liability will also be voided in the
following cases:
•if work is performed on the unit and its compo-
nents in a manner that does not comply with the
terms of this operating manual;
• if work is performed on the unit and its compo-
nents in an improper manner;
•if work is performed on the unit that is not
described in this operating manual, and this work
was not expressly approved in writing by the
manufacturer;
•if the unit or components in the unit are modied,
redesigned or removed without the express writ-
ten permission of the manufacturer.
EC conformity
The unit bears the CE mark of conformity.
EC declaration of conformity
Safety
The unit is operationally safe when used for the intended
purpose. The construction and design of the unit
conform to the state of the art, 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 per-
son 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 com-
ply with the applicable accident prevention and safety
regulations. This applies in particular to the wearing of
personal safety gear.
DANGER!
Unit operates using high electric voltage!
DANGER!
Danger 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!
CAUTION!
If using the unit in 3~230V systems, please
note that the residual-current circuit
breaker (RCCB) used must be AC-DC sen-
sitive.
DANGER!
Only qualied technicians (trained heat-
ing, cooling, refrigerant and electrical
technicians) may perform work on the
unit and its components.
WARNING!
Observe safety labels on and in the unit.
WARNING!
Unit contains refrigerants!
Leaking refrigerant can result in personal
injury or material damage. Therefore:
– Shut down unit.
– Notify the manufacturer’s authorised
service center.

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83054300dUK © ait-deutschland GmbH
ATTE NTION
For safety reasons:
Never disconnect the unit from the power sup-
ply, unless the unit is being opened.
ATTE NTION
Install the heat pump only indoors and operate
only with outside air as the heat source. The air
ducts must discharge into the open air. Do not
restrict or block the air ducts.
Dimensional drawing and installation plan for
respective model.
WARNING!
Switch on unit only if air ducts are
mounted on the unit.
Take measures on the fan side to pre-
vent injuries from the rotating fan (above-
ground air duct discharge: weather grille,
below-ground air-channel discharge: rain
guard – accessories not included in scope
of delivery).
ATTE NTION
The integration of the heat pump in ventila-
tion systems is not permissible. The use of the
cooled air for cooling purposes is not permitted.
ATTE NTION
The ambient air in the location where the heat-
ing pump is installed and also the intake air which
is used as a source of heat must not contain any
kind of corrosive components!
Components such as ammonia, sulphur, chlo-
rine, salt, sewer gas, ue gases etc. may cause
damage leading to complete failure or even a to-
tal write-off of the heating pump!
CAUTION!
In the air outlet area the air temperature
is ca. 5 K below the ambient temperature.
Under certain climatic conditions, there-
fore, an ice layer can form in the air out-
let area. Install the heat pump so that the
air blower does not blow in the direction
of footpaths.
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.
NOTICE.
Please contact your dealer concerning warran-
ties and guarantees.
Disposal
When decommissioning the unit, always comply with ap-
plicable laws, directives and standards for the recovery,
recycling and disposal of materials and components of
colling units.

6
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83054300dUK © ait-deutschland GmbH
Information for operators
Functioning principle of heat
pump system
Heat pumps operate on the principle of a refrigerator:
the same technology, only with the opposite effect. 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 ground water. The extracted heat is condi-
tioned 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 oor
heating:
4⁄4= usable energy
ca. 3⁄4= environmental energy
ca. 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 utilized in new or existing heating systems.
Overview "Technical data / scope of delivery".
Heat quantity recording
In addition to proof of the unit's efciency, heating
legislation also requires heat quantity recording (referred
to as WME in this manual). The WME is mandatory with
air/water heat pumps. With brine/ water and water/
water heat pumps, a WME is only required when the
feed temperature is ≥ 35 °C. The WME must record the
total warm energy release (heating and hot water) in
the building. In heat pumps with heat quantity recording,
the analysis is conducted by the regulator. The regulator
displays the thermal energy that is exchanged from the
heating system in kWh.
Operation
Your decision to purchase a heat pump or a heat pump
system is a long-term contribution to protecting the
environment through low emissions and reduced primary
energy use.
You can operate and control the heat pump system
with the control element of the heating and heat pump
regulator.
NOTICE.
Make sure that the control settings are correct.
Operating manual of the heating and heat pump
regulator.
To ensure that your heat pump or heat pump system
operates efciently and ecologically, the following are
especially important:
€ENERGY SAVING TIP
Avoid unnecessarily high ow temperatures.
A lower ow temperature on the hot water side
increases the efciency of the system.
€ENERGY SAVING TIP

7
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83054300dUK © ait-deutschland GmbH
When letting in fresh air, do not leave windows
open for an extended period, thus saving energy
and reducing your heating costs.
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 regular
maintenance.
According to EU regulation (EC) 842/2006 of May 17,
2006, leak inspections and maintenance of a log book
are required by law for certain heat pumps!
The criteria for conducting leak inspections and main-
taining a log book are based on the hermetic impermea-
bility of the cooling circuit and the refrigerant capacity of
the heat pump! No log book is required for heat pumps
with a refrigerant capacity of < 3kg. With all other heat
pumps, the log book is included with all other delivered
materials.
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, l-
ters, dirt traps) should be inspected as well as cleaned as
needed - at the very least annually - by a qualied heating
or cooling system technician.
It is a good idea to have a maintenance contract with
a specialist company. The company will conduct the
required maintenance at regular intervals.
ATTE NTION
Check regularly to ensure that the condensate
can drain out of the unit unobstructed. To this
end, regularly check the condensate pan in the
unit and the condensate drain to ensure that
they are clean / free from obstructions and clean
as needed.
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.
Flushing of the liqueer with chemical
cleaning agents must be followed by
neutralisation of residue and intensive
rinsing with water. Always observe the
technical data of the manufacturer of the
heat exchanger.
Malfunctions
In the event of a malfunction, you can detect the cause of
the malfunction via the diagnostic program of the heating
and heat pump regulator.
Operating manual of the heating and heat pump
regulator.
DANGER!
Service and repair work on the compo-
nents of the unit may be performed only by
customer service personnel authorised by
the manufacturer.
Overview “Customer service”.

8
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83054300dUK © ait-deutschland GmbH
“Commissioning”, “Safety temperature limiter”
section.
Instructions for qualied
technicians
Scope of delivery
Example of scope of delivery:
View 1:
View 2:
Unit with a completely hermetically
enclosed compressor, all safety-
related components for monitoring
of the cooling circuit, integrated
heating and heat pump regulator,
sensors mounted in the unit for
the monitoring of hot gas, heating
water forward ow and return
ow temperatures, as well as a
hose for condensate discharge
(connected to heat pump side)
Proceed as follows:
Inspect delivery for outwardly visible signs of
damage.
Check to make sure that delivery is complete.
Any defects or incorrect deliveries must be claimed
immediately.
ACCESSORIES NECESSARY FOR OPERATION
ATTE NTION
Use only original accessories from the manufac-
turer of the unit.

9
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83054300dUK © ait-deutschland GmbH
Air ducts (with air duct accessories) must be ordered
separately.
ADDITIONAL ACCESSORIES
The installation accessories (vibration decouplers)
for air/water indoor installation heat pumps must be
ordered separately.
Installation and assembly
Observe the following when performing all work:
NOTICE.
Always comply with applicable accident pre-
vention regulations, statutory regulations, ordi-
nances and directives.
WARNING!
The heat pump or heat pump system may
be installed and assembled only by a quali-
ed technician!
NOTICE.
Observe the sound levels of the respective
model.
Overview “Technical data / scope of delivery”,
“Sound” section.
INSTALLATION LOCATION
ATTE NTION
Install the unit only indoors.
The installation area must be frost-free and dry. It must
meet the requirements of DIN EN 378. It must also fulll
applicable local regulations.
Dimensional drawing and installation plan for
respective model.
TRANSPORT TO INSTALLATION LOCATION
To prevent damage during transport, always transport
the unit to nal installation location in its original packag-
ing, using a lifting truck.
If it is not possible to transport the unit to the nal instal-
lation location using a lifting truck, you can also transport
the heat pump using a hand truck or with pipes.
DANGER!
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.
DANGER!
Unit is not fastened to the wooden pallet.
Danger of tipping over during transport!
This can result in personal injury and dam-
age to the unit.
– Take suitable precautionary measures
to eliminate the danger of tipping.
DANGER!
Make sure to secure unit against slipping
during transport.
ATTE NTION
Never use components and hydraulic connec-
tions on the unit for purposes of transport.
ATTE NTION
Do not damage the hydraulic connections under
any circumstances.
ATTE NTION
Do not tilt the unit more than a maximum of 45°
(in any direction).
LIFTING THE UNIT WITH PIPES
The units can be lifted with 3/4" and/or 1" pipes (provided
by customer) that are suitable for the weight of the
respective unit. Special holes are provided in the frame
for this purpose.
Proceed as follows:
Remove lower facing panels on the switch cabinet
side (= operator side) of the unit. To do so, loosen
quick-release screws. Turn counter-clockwise 90°…

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83054300dUK © ait-deutschland GmbH
Insert the pipes through the holes in the frame on
the switch cabinet side (= operator side)…
1 Holes in the frame
2 Inserted pipes
Make sure that pipes do not damage cable assem-
blies and components in the unit. Guide pipes care-
fully past cable assemblies and components in the
unit…
Guide pipes through the marked openings on the
back side of the unit…
Lift the unit on the pipes with at least four people
and carry it to its nal installation location…
NOTICE.
Carry the unit horizontally and secure it against
slipping.
Put the unit in its nal installation location. Make
sure that the frame of the unit is in full contact with
the underlying surface…
Remove the pipes and re-place the sealing grom-
mets on the back side of the unit…
If the electrical connections will not be carried out
directly thereafter, mount the lower facing panel on
the operating side.
1 Quick-release screws
2 Lower facing panel
Pull lower facing panel upwards and outwards,
detach and set securely to the side…
On the back of the unit, remove the sealing
grommet…

11
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83054300dUK © ait-deutschland GmbH
INSTALLATION
Set the unit on a stable, solid and level, preferably
sound-insulated surface. Make sure that the foundation
is designed for the weight of the heat pump.
ATTE NTION
In the air outlet area the air temperature is ca.
5 K below the ambient temperature. Under cer-
tain 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.
DANGER!
Several people are required to install the
unit.
CAUTION.
Do not tilt the unit more than a maximum of 45°
(in any direction).
NOTICE.
Always observe the installation plan for the re-
spective model. Note the size and minimum
clearances.
Installation plan for respective model.
Set up the unit so that the switch cabinet side (= operat-
ing side) is accessible at all times.
MOUNTING THE AIR DUCTS
NOTICE.
Note the air blow-out direction of the unit.
– Units with the abbreviation L in the model desig-
nation blow the air out to the left (when viewed
from the control side).
ATTE NTION
Use only original accessories or air ducts rec-
ommended by the manufacturer (breglass light-
weight concrete ducts).
Mount air ducts only according to the installa-
tion plan for the respective unit.
Installation plan for respective model.
WALL DUCT(S) ASSEMBLY
Remove the parts necessary for the assembly of the
wall duct(s) from their respective boxes…
Next, interlock the 2 pieces of the wall duct(s) that
belong together, as illustrated in the following draw-
ing. Use the lubricant supplied upon delivery to help
in this process…
Afx an additional part as illustrated…
Rotate the already-interlocked parts 90° and afx
the nal piece at the bottom…

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83054300dUK © ait-deutschland GmbH
Rotate the already-interlocked parts by 90° once
again and set up the nal connection…
Stabilise the wall duct from the inside using the
chipboard included with delivery…
Install the wall duct in the masonry from the
house exterior. This can either be done during
the construction phase (by means of sealing)…
NOTICE.
Mount the wall ducts 1 cm above the nished
outer facade.
1 Masonry of the house exterior
2 Insert the wall duct in the
masonry (1 cm above the
nished outer facade)
or retrot (using foam in the masonry):
1 Finished outer facade
NOTICE.
Wall ducts x wall openings, help avoid cold air
transmission in the masonry as well as assist in
the assembly of weather / rain guards and wire
mesh grilles
AIR DUCTS ASSEMBLY
Proceed as follows:
Remove the parts necessary for the assembly of the
air duct(s) from their respective boxes…
The interlocking of the air ducts is carried out
as described in the section – entitled "Wall
duct(s) assembly".
SECURING THE AIR DUCT INTO THE WALL DUCT
Proceed as follows:
Pull the roll seal included with delivery over the end
of the air duct…
Push this end of the air duct into the wall duct.

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83054300dUK © ait-deutschland GmbH
Repeat – the process on the air output side.
NOTICE.
Don't forget:
After the air ducts have been secured to the
heat pump, close the opening between the wall
duct and the air duct using the bentonite water-
stop tape included with delivery.
NOTICE.
Secure the air ducts to the cover using appropri-
ate measures.
SCREEN FRAME ASSEMBLY
Screw the screen frame to the wall ducts on both the air
intake and output sides.
NOTICE.
The screen frame has no function, it is included
solely to provide an optically attractive transi-
tion to the wall duct.
1 Wall duct
2 Air duct
3 Roll seal
4 Bentonite waterproong tape
(apply only after assembling the
unit's connection fastener)
NOTICE.
After the other end of the air duct has been se-
cured to the heat pump, close the opening be-
tween the wall duct and the air duct using the
bentonite waterstop tape included with delivery.
SECURING THE AIR DUCT ON THE HEAT PUMP
Proceed as follows:
Clip on the assembly rail and secure it using special
screws to the spots on the air duct designated as
the air intake side…
Stick the adapter base included with delivery on the
edge of the air duct…
Position the air duct on the respective opening of
the air intake side…
Hook the tension springs included with delivery
into the holes provided for them on the air intake
side of heat pump 4…
Hook the tension springs into the assembly tail that
has been screwed on to the air duct…
Secure a protective cap over the assembly rail…

14
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83054300dUK © ait-deutschland GmbH
8 x
NOTICE.
If the wall duct is positioned above ground level,
attach the weather guard.
If the wall duct is positioned in a light well (be-
low ground level), attach the rain guard.
Repeat – the process on the air output side.
INSTALLATION / CONNECTION TO HEATING CIRCUIT
DANGER!
Danger of fatal injury due to electric
shock!
Before opening the unit, disconnect the
system from the power supply and secure
it from being switched back on!
ATTE NTION
Connect the unit to the heating circuit accord-
ing to the hydraulic diagram for the respective
model.
“Hydraulic connection” instructions.
NOTICE.
Check to make sure that the diameters and
lengths of the pipes for the heating circuit are
sufciently dimensioned.
NOTICE.
Circulating pumps must be multi-stage. They
must be able to deliver at least the minimum hot
water ow rate required for your model.
WIRE MESH GRILLE AND WEATHER / RAIN GUARDS
ASSEMBLY
Proceed as follows:
Remove the wire mesh grille and the weather / rain
guards as well as the assembly frame and fastening
material from their respective boxes…
From the outside of the house inwards, insert the
assembly frame into the wall duct on the air intake
side and secure with screws…
8 x
Position the wire mesh grille in the assembly
frame…
Set the weather / rain guards on the assembly frame
in the wall duct and screw down…

15
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83054300dUK © ait-deutschland GmbH
Overview “Technical data / scope of delivery”,
“heating circuit” section.
ATTE NTION
The hydraulic system must be equipped with a
buffer tank, the required volume of which de-
pends on the model of your unit.
Overview “Technical data / scope of delivery”,
“heating circuit, buffer tank” section.
ATTE NTION
When installing the connections, always secure
the connections on the unit from twisting, in or-
der to prevent damage to the copper pipes in
the interior of the unit.
Proceed as follows:
Rinse heating circuit thoroughly prior to connecting
the unit to the heating circuit…
NOTICE.
Contamination and deposits in the heating cir-
cuit 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.
NOTICE.
During installation of the shut-off devices, the
liqueer of the heat pump can be ushed, if nec-
essary.
ATTE NTION
The condenser may be ushed only by
customer service personnel authorised by
the manufacturer .
Connect the unit to the pipes of the heating cir-
cuit via vibration decouplers. They must be installed
in order to prevent damage from vibrations to the
pipes.
NOTICE.
Vibration decouplers are available as accesso-
ries.
The connections for the heating water outow (forward
ow) and the hot water inow *(return ow) are marked
accordingly.
For positioining of the connections, reference
the dimensional drawing for the respective
model.
CONDENSATE DISCHARGE
The condensation water that accumulated from the air
must be drained via the pre-mounted hose in the unit
for condensate discharge. To do so, connect the hose
for condendate discharge with a water drain.
For positioning of the connection for conden-
sate discharge, see dimensional drawings for the
respective model.
1 Hose for condensate discharge
in interior of unit
2 Connection for the condensate
discharge on the outside of the unit
ATTE NTION
Guide the pre-mounted hose in the unit for con-
densate discharge in the interior of the unit as a
siphon, as shown in the illustration.
Discharge of the condensate into the sewage system is
permitted only via a funnel siphon, which must be acces-
sible at all times.

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83054300dUK © ait-deutschland GmbH
Circulating pumps
ATTE NTION
Always note the model.
Do not use regulated circulating pumps.
Circulating pumps and domestic hot water circu-
lation pumps must be multi-stage pumps.
Water heating
Water heating with the heat pump requires an additional
hot water circuit, parallel to the heating circuit. Make
sure that the heating water charge is not channelled
through the buffer tank of the heating circuit.
“Hydraulic connection” instructions.
Hot-water tank
If the heat pump is to be used for heating hot water, you
must integrate special hot-water tanks in the heat pump
system. The storage volume must be sufcient so that
the required hot water quantity is available even during
a power cut.
NOTICE.
The heat exchanger surface of the hot water
tank must be dimensioned so that the heating
capacity of the heat pump is transferred with
minimal spreading.
We offer a variety of hot-water tanks for you to choose
from. They are optimised for use with your heat pump.
NOTICE.
Integrate the hot-water tank in the heat pump
system according to the hydraulic diagram for
your system.
“Hydraulic connection” instructions.
Pressure relief
Equip the heating circuit in accordance with local stand-
ards and directives with a safety valve and an expansion
tank.
Also install lling and emptying devices, shut-off devices
and non-return valves in the heating circuit.
Overow valve
Use an overow valve for tanks integrated in series to
ensure the minimum ow rate of the heating circuit vol-
ume 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. It ensures a minimum
operating time of the heat pump when the heating cir-
cuit valves are closed. The required volume of the buffer
tank is calculated based on the following formula:
VBuffer tank = minimum ow rate of heat circuit volume ow / hour
10
For the minimum ow rate of the heat cir-
cuit volume ow, see overview “Technical
data / Scope of delivery”, “Heating circuit” sec-
tion.
In mono-energetic air/water systems, integrate the
buffer tank in the heating water outow (forward ow)
before the overow valve.

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We reserve the right to modify technical specifications without prior notice.
83054300dUK © ait-deutschland GmbH
•
Cut out the rubber sockets on the facing panel…
For positioning of the rubber sockets for insert-
ing the wires, see "dimensional drawing" for the
respective model.
•
Insert the cables through the rubber sockets in the
unit…
The wires inside the unit are guided in a closed wire
duct to the terminals on the switch plate.
Install electric connections according to the termi-
nal diagram that applies to your model…
Terminal diagram for respective model.
ATTE NTION
Ensure clockwise rotary eld of the load power
supply (compressor).
– An incorrect rotary eld of the compressor
during operation can cause serious, irreparable
damage to the compressor.
ATTE NTION
Make sure to equip the power supply of the heat
pump with a 3-pole automatic cut-out with at
least 3 mm contact gap.
Note the level of the release current.
Overview “Technical data / scope of delivery”,
“Electric” section.
ATTE NTION
If using the unit in 3~230V systems, please note
that the residual-current circuit breaker (RCCB)
used must be AC-DC sensitive.
ATTE NTION
Factory setting for the electric heating element
in units with integrated electic heating elements
is 6 kW (9 kW). It can be changed at contactor
Q5 (Q6) for 2 (3) or 4 kW (6kW).
For further information, see the adhesive label
on the electric heating element.
Electrical connections
Observe the following when performing all work:
DANGER!
Danger 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!
DANGER!
Observe the relevant EN-, VDE and/or
applicable local safety regulations during
installation and during all electrical work.
Comply with any technical connection re-
quirements laid down by the responsible
power supply company!
NOTICE.
All live wires must be stripped before they are
installed in the cable duct of the switch cabinets!
POWER CONNECTION
Proceed as follows:
If the unit is closed, open the facing panels on the
operating side…
"Installation".
Open electrical switch cabinet of unit…
Example of open
electrical switch cabinet…
Lead 230 V power cable, power cable for circulat-
ing pumps and cable for external temperature sen-
sor through the rubber sockets on the facing panel
in the unit…

18
We reserve the right to modify technical specifications without prior notice.
83054300dUK © ait-deutschland GmbH
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).
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
NOTICE.
Using a suitable network cable, the control ele-
ment of the heat and heat pump regulator can be
connected with a computer or a network allow-
ing the heating and heat pump regulator to be
controlled from there.
If such a connection is desired, lay a category 6
screened network cable with RJ-45 plug through
the unit parallel to the heating and heat pump
regulator control cable already present when
making the connections, and lead it through the
front panel of the unit.
Close electrical switch cabinet of unit….
Attach the lower facing panels.
Flushing, lling and bleeding
the system
ATTE NTION
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.
Alpha InnoTec ensures continuous technological
advances, but all these technical renements require
the system to be operated with correctly lled heating
water. 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-

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We reserve the right to modify technical specifications without prior notice.
83054300dUK © ait-deutschland GmbH
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
Flush, ll and bleed the heating circuit…
In addition, bleed the condenser of the heat pump…
•
Open the lower facing panel…
•
Open the bleed valve…
Following bleeding, close the lower facing panel.
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.
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,

20
We reserve the right to modify technical specifications without prior notice.
83054300dUK © ait-deutschland GmbH
Insulating the hydraulic
connections
Insulate the vibration decouplers and the pipes of the
heating circuit.
NOTICE.
Insulate in accordance with applicable local
standards and directives.
Installation of the control
element
DANGER!
Danger 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!
Situated at different heights in the front panel of the unit
are four-pin sockets for fastening the control element:
1 four upper recesses
2 four lower recesses
Four hooks are located on the back side of the control
element and can be used to hang the control element on
the front facade of the unit:
Proceed as follows:
Hang the control element's hooks on the recesses
of the front facade (either in the upper or lower
recesses)…
Example:
Control element in upper recesses
Push the control element down until it locks into
position…