alphainnoTec LW 140A User manual

UK
83054200iUK
Air/Water Heat Pumps
Outdoor installation
Operating Manual
LW 140A – LW 251A

2Subject to change without notice | 83054200iUK | 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 oper-
ators of the unit.
Read the operating manual before working on or op-
erating the unit. This applies in particular to the chap-
ter 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 lo-
cal service partner.
Since this operating manual was written for sever-
al 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 oper-
ating manual may be reproduced, transmitted, copied,
stored in electronic data systems or translated into an-
other language, either wholly or in part, without the ex-
press written permission of the manufacturer.
2 Symbols
The following symbols are used in the operating man-
ual. They have the following meaning:
Information for uers.
Information or instructions for qualied
technicians.
DANGER
Indicates a direct impending danger result-
ing in severe injuries or death.
WARNING
Indicates a possibly dangerous situation
that could result in severe injuries or death.
CAUTION
Indicates a possibly dangerous situation
that could result in medium or light inju-
ries.
IMPORTANT
Indicates a possibly dangerous situation,
which could result in property damage.
NOTE
Emphasized information.
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 Exclusion of liability ...................................... 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 utilization ........................................... 6
12 Heat quantity recording ............................... 7
13 Operation ......................................................... 7
14 Care of the unit .............................................. 7
15 Scope of delivery .......................................... 8
16 Installation and assembly ........................... 9
16.1 Installation site requirements .................... 9
16.2 Transport to installation site ...................... 9
16.3 Installation ................................................11
16.4 Attaching the air ow ba󰀪es ....................11
16.5 Installation / connection to
heating circuit .......................................... 13
16.6 Condensate discharge ............................ 13
17 Pressure relief .............................................. 14
18 Overow valve ............................................. 14
19 Bu󰀨er tank ..................................................... 14
20 Circulating pumps ....................................... 14
21 Water heating ............................................... 14
22 Hot-water tank .............................................. 14
23 Electrical connections ................................ 15
24 Rinsing, lling and bleeding the system 16
25 Insulating the hydraulic connections ...... 17
26 Set the overow valve ................................ 17
27 Commissioning ............................................ 18
28 Maintenance of the unit ............................. 19
28.1 Annual maintenance ............................... 19
28.2 Cleaning and rinsing of unit components 19
29 Malfunctions ................................................. 20
29.1 Unlock the safety temperature limiter ..... 20
30 Dismantling ................................................... 20
30.1 Removal of the bu󰀨er battery .................. 20
Technical data / scope of delivery .................. 22
Performance curves .......................................... 24
LW 140A ........................................................... 24
LW 180A ........................................................... 25
LW 251A ........................................................... 26
Dimensional drawings ....................................... 27
LW 140A – LW 180A ........................................ 27
LW 251A ........................................................... 28
Installation plans ................................................. 29
LW 140A – LW 180A ........................................ 29
LW 251A ........................................................... 30
Coastal installation ........................................... 31
Hydraulic integration .......................................... 32
LW 140A – LW 251A ......................................... 32
Row tank .......................................................... 32
Separate bu󰀨er tank ......................................... 33
Legend Hydraulic integration ........................... 34
Terminal diagram ................................................ 35
Circuit diagrams .................................................. 36
LW 140A ........................................................... 36
LW 180A ........................................................... 38
LW 251A ........................................................... 40
EC declaration of conformity ........................... 43

4Subject to change without notice | 83054200iUK | ait-deutschland GmbH
3 Intended use
The unit may be used only for the intended use. This
means:
●for heating.
● for heating hot water.
The unit may be operated only within its technical pa-
rameters.
 “Technical data / scope of delivery“, from
page 22
NOTE
Notify the responsible power supply company
of the use of a heat pump or heat pump sys-
tem.
CAUTION
The unit is not suitable for use in IT network
systems.
4 Exclusion of liability
The manufacturer will not be liable for damage result-
ing from unauthorized 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 de-
scribed 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
written permission of the manufacturer.
5 EC conformity
The unit bears the CE mark of conformity.
 “EC declaration of conformity”, page 43
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)
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.

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During the warranty and guarantee period, service
work and repairs may only be carried out by personnel
authorised by the manufacturer.
DANGER
Danger of fatal injury due to electric
current!
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 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.
IMPORTANT
If using the unit in 3~230V systems, please
note that the residual-current circuit breaker
(RCCB) used must be AC-DC sensitive.
WARNING
Observe safety labels on and in the unit.
WARNING
Unit contains refrigerants!
Leaking refrigerant could result in person-
al injury or material damage. Therefore:
● Shut down unit.
● Notify the manufacturer’s authorized ser-
vice center.
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“, from page 27, and “In-
stallation plans“, from page 29, for respective
unit model
WARNING
Never switch on unit if air ow ba󰀪es on
the unit are removed.
IMPORTANT
The integration of the heat pump in ventila-
tion systems is not permissible. The use of
the cooled air for cooling purposes is not per-
mitted.
IMPORTANT
The ambient air in the location where the
heating 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,
chlorine, salt, sewer gas, ue gases etc. may
cause damage leading to complete failure or
even a total write-o󰀨 of the heating pump!
CAUTION
In the air outlet area the air temperature is
approx. 5 K below the ambient temperature.
Under certain climatic conditions, an ice lay-
er can therefore form in the air outlet area.
Install the heat pump such that the air blow-
er does not discharge into footpath areas .
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.
1. Completely drain the system and the condenser,
and open vent valves.
2. Blow them clear with compressed air, if required.

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7 Contact
Addresses for purchasing accessories, for servicing or
for answers to questions about the unit and this oper-
ating manual can be found on the internet and are 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 re-
covery, recycling and disposal of materials and com-
ponents of cooling units.
 “30 Dismantling”, page 20
10 Operating principle of heat
pumps
Heat pumps operate on the principle of a refrigera-
tor: the same technology, only with the opposite e󰀨ect.
The refrigerator extracts heat from foods, which is re-
leased 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
oor heating:
4⁄4 = usable energy
approx. 3⁄4 = environmental energy
approx. 1⁄4 = external electrical energy
11 Area of utilization
Taking into consideration the ambient conditions, lim-
its of application and the applicable regulations, eve-
ry heat pump can be utilized in new or existing heat-
ing systems.
 “Technical data / scope of delivery“, from
page 22

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12 Heat quantity recording
In addition to the proof of the unit’s e󰀩ciency,
EEWaermeGalso meets the demand for a heat
quantity recording (hereafter refered to as HQR). The
HQR is mandatory with air/water heat pumps. With
brine/ water and water/water heat pumps, a HQR
may only be set up when a forward ow temperature
of ≥ 35 °C has been reached. The HQR 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.
13 Operation
Your decision to purchase a heat pump or a heat pump
system is a long-term contribution to protecting the en-
vironment through low emissions and reduced prima-
ry energy use.
You can operate and control the heat pump system
with the control element of the heating and heat pump
regulator.
NOTE
Make sure that the control settings are cor-
rect.
 Operating manual of the heating and heat pump
regulator
To ensure that your heat pump or heat pump system
operates e󰀩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 e󰀩ciency of the system.
€ENERGY SAVING TIP
When letting in fresh air, do not leave win-
dows open for an extended period, thus sav-
ing energy and reducing your heating costs.
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 tech-
nical components of the unit.

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15 Scope of delivery
Packing unit 1:
Air ow ba󰀪es (quantity of 2, each in a
separate box)
Packing unit 2:
Basis unit with fully hermetically enclosed
compressor, all safety-related components
for monitoring of cooling circuit and hose for
condensate discharge (connected on heat pump
side).
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.
NOTE
Note the model.
 “Technical data / scope of delivery“, from
page 22
Accessories necessary for operation
IMPORTANT
Use only original accessories from the manu-
facturer of the unit.
Heating and heat pump controllers, as wall-mounted
controllers or integrated in the hydraulic tower (for out-
put range 14 – 18kW), as well as control and sensor
cables, are functionally necessary accessories, which
you must order separately.
The heat pump is a functioning unit only with the heat-
ing and heat pump regulator and the control and sen-
sor wires.
Heating and heat pump regulator
(for wall mounting)
Control and sensor wires are available in various
lengths, as required.
Additional accessories
You must order separately:
● installation accessories (vibration decouplers)
for air/water outdoor installation heat pumps
● air / magnetic sludge separator

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16 Installation and assembly
Observe the following when performing all work:
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 22, “Sound” section.
16.1 Installation site requirements
9Perform installation outdoors only.
9Clearance dimensions are met
 “Dimensional drawings“, from page 27, and “In-
stallation plans“, from page 29, for respective
unit 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
16.2 Transport to installation site
To prevent damage during transport, always transport
the unit to nal installation site in its original packaging,
using a lifting truck, forklift or crane.
WARNING
Several people are required to transport
the unit. Do not underestimate the weight
of the unit.
 “Technical data / scope of delivery“, from
page 22, “General unit data” section.
WARNING
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.
IMPORTANT
Never use components and hydraulic con-
nections on the unit for purposes of transport.
IMPORTANT
Do not tilt the unit more than a maximum
of 45° (in any direction).
Lifting the unit with pipes
only LW 140… and LW 180…
The units LW 140… and LW 180… can be lifted with
¾” pipes (provided by customer) that are suitable for
the weight of the respective unit. Special holes are
provided in the frame for this purpose.
NOTE
The unit type LW 251A cannot be lifted with
pipes.
1. Remove the lower facing panels of the unit.
 “16.4 Attaching the air ow ba󰀪es”, page 11,
point 1.
2. Insert the pipes through the holes in the frame on
the switch box side.

10 Subject to change without notice | 83054200iUK | ait-deutschland GmbH
Make sure that pipes do not damage cable assemblies
and components in the unit.
Guide pipes carefully past cable assemblies and
components in the unit.
3. Guide pipes out through the holes on the water
connection side.
4. Lift unit by the pipes, with at least four persons,
and place on the base. Make sure that the frame
of the unit is in full contact with the underlying sur-
face.
Lifting the unit with a crane
NOTE
The unit type LW 251A must be lifted with a
crane.
1. Remove side laths on the wooden pallet.
2. Guide lifting straps under the unit. Insert laths or
beams between the lifting straps and the unit in
order to prevent damage to the housing, or re-
move facing panels (see removal instructions un-
der “Attaching air ow ba󰀪es”).
A Front view (switch box side)
B Side view 1
DANGER
Lifting straps should not be too close to-
gether or too near the center; otherwise
the unit may tip!
C Side view 2
IMPORTANT
Guide lifting straps past the fan on the side.
Make sure the straps do not press against the
fan during transport.
3. Lift unit with the crane and place on the base.
Make sure that the frame of the unit is in full con-
tact with base.

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16.3 Installation
CAUTION
In the air outlet area the air temperature is
approx. 5 K below the ambient temperature.
Under certain climatic conditions, an ice lay-
er can therefore form in the air outlet area.
Install the heat pump such that the air blow-
er does not discharge into footpath areas .
IMPORTANT
Do not tilt the unit more than a maximum
of 45° (in any direction).
NOTE
Always observe the installation plan for the
respective unit model. Note the size and min-
imum clearances.
 “Installation plans“, from page 29, for respec-
tive unit model
Set up the unit so that the switch box side is accessi-
ble at all times.
16.4 Attaching the air ow ba󰀪es
WARNING
Unit has rotating parts.
For safety reasons, mount the two air ow
ba󰀪es on the unit before continuing with
any other work.
1. If you have not already done so, remove lower
facing panels on the switch box and water con-
nection side of the unit.
1.1. To do so, loosen the two quick-release screws on
the lower facing panels.
1.2. Pull each facing panel forward, detach from the
unit and set securely aside.
1 lower facing panels
2. Remove upper facing panels from unit.
2.1. To do so, loosen the two screws on the lower edg-
es of the upper facing panels.
2.2. Pull each facing panel downward and forward, de-
tach from top cover of unit and set securely aside.
1 top cover of unit
2 upper facing panels
3. The top cover of the unit was fastened by the up-
per facing panels. After removal of the upper fac-
ing panels, the top cover is loose. Remove top
cover and set securely aside.

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5. Return top cover to frame.
6. Suspend upper facing panels in the top cover.
Bolt to the frame at bottom.
The air ow ba󰀪es are now installed. You can now
carry out mounting and installation work on the
unit, and afterwards attach the lower facing pan-
els. (see “Electrical connection work”, “Heat pump
side connection of control and sensor wires”, 6).
4. Install air ow ba󰀪es.
IMPORTANT
Remove the protective sheeting from the air
ow ba󰀪es before installation
4.1. Suspend air ow ba󰀪es on the brass bushings on
the top side of the frame.
1 eyelet on air ow ba󰀪e
2 brass bushing on frame
4.2. Bolt air ow ba󰀪es to the frame on the switch box
side and water connection side.

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16.5 Installation / connection to
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.
IMPORTANT
Connect the unit to the heating circuit accord-
ing to the hydraulic diagram for the respec-
tive model.
 “Hydraulic connection” instructions
NOTE
Check to make sure that the diameters and
lengths of the pipes for the heating circuit (in-
cluding the ground lead between the heat
pump and the building!) are su󰀩ciently di-
mensioned.
NOTE
Circulating pumps must be multi-stage. They
must be able to deliver at least the minimum
hot water ow rate required for your model.
 “Technical data / scope of delivery“, from
page 22, “Heating circuit” section
IMPORTANT
The hydraulic system must be equipped with
a bu󰀨er tank, the required volume of which
depends on the model of your unit.
 “Technical data / scope of delivery“, from
page 22, “Heating circuit” section, “bu󰀨er tank”
IMPORTANT
When installing the connections, always se-
cure the connections on the unit from twist-
ing, in order to prevent damage to the copper
pipes in the interior of the unit.
1. Install the outside pipes of the heating circuit be-
neath 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.
NOTE
During installation of the shut-o󰀨 devices, the
liqueer of the heat pump can be rinsed, if
necessary.
3. Connect the unit to the pipes of the heating circuit
via vibration decouplers.
They must be installed in order to prevent damage
from vibrations to the pipes.
NOTE
If an existing system is being replaced, the old vi-
bration decoupling may not be reused.
Vibration decouplers are available as accessories.
1 Hot water inow (return ow) connection
2 Hot water outow (forward ow) connection
3 Condensate water hose
4. Install the condensate water hose in the unit so
that there is no contact with refrigerant pipes.
5. Make sure that frost-free condensate discharge is
ensured.
 “Installation plans“, from page 29, for respec-
tive unit model
 Heat pump planning & design manual
6. Seal empty pipes on unit side.
16.6 Condensate discharge
The condensate from the air must be discharged frost-
free via a condensate pipe with a minimum diameter of
50 mm. For underlying surfaces that are permeable to
water, it is su󰀩cient to insert the condensate pipe ver-
tically at least 90 cm into the ground. If the condensate
is discharged into drainage or sewage systems, install
frost-free with gradient.
Discharge of the condensate into the sewage system
is permitted only via a funnel siphon, which must be
accessible at all times.

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17 Pressure relief
Equip the heating circuit in accordance with local
standards and directives with a safety valve and an ex-
pansion tank.
Also install lling and emptying devices, shut-o󰀨 devic-
es and non-return valves in the heating circuit.
18 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 o󰀨.
 “26 Set the overow valve”, page 17
19 Bu󰀨er tank
The hydraulic connection of the heat pump requires a
bu󰀨er tank in the heating circuit. The required volume
of the bu󰀨er tank is calculated based on the following
formula:
VPu󰀨erspeicher =
Minimum ow rate of
heat circuit volume ow / hour
10
 For the minimum ow rate of the heat circuit vol-
ume ow, see “Technical data / scope of delivery“,
from page 22,“Heating circuit” section
In mono-energetic air/water systems, integrate the
buf-fer tank in the heating water outow (forward ow)
before the overow valve.
20 Circulating pumps
CAUTION
Always note the model.
Do not use regulated circulating pumps.
Circulating pumps and domestic hot water cir-
culation pumps must be multi-stage pumps.
21 Water heating
Water heating with the heat pump requires an addi-
tional hot water circuit, parallel to the heating circuit.
Make sure that the heating water charge is not chan-
neled through the bu󰀨er tank of the heating circuit.
 “Hydraulic connection” instructions
22 Hot-water tank
If the heat pump will be used for heating hot water,
you must integrate special hot-water tanks in the heat
pump system. The storage volume must be su󰀩cient
so that the required hot water quantity is available
even during a power outage.
NOTE
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 o󰀨er a variety of hot-water tanks for you to choose
from. They are optimized for use with your heat pump.
NOTE
Integrate the hot-water tank in the heat pump
system corresponding to the hydraulic dia-
gram for your system.

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5. Install power cable in a conduit as far as where it
enters the building and from there on to the fuse
box.
6. Connect power cable to power supply.
IMPORTANT
Ensure clockwise rotary eld of the load
power supply (compressor).
● An incorrect rotary eld of the com-
pressor during operation can cause
serious, irreparable damage to the
compressor.
IMPORTANT
The power supply for the heat pump must be
equipped with an all-pole miniature circuit-
breaker with at least 3 mm contact spacing to
IEC 60947-2.
Note the level of the release current.
 “Technical data / scope of delivery“, from
page 22, “Electric” section.
IMPORTANT
If using the unit in 3~230V systems, please
note that the residual-current circuit breaker
(RCCB) used must be AC-DC sensitive.
Heat pump side connection of the control
and sensor wires
The heat pump is connected to the heating and heat
pump regulator by means of the control and sensor
wires. They are connected at the electric switch box
on the switch box side of the heat pump.
1. Screw control and sensor wires to the two con-
nectors on the side of the electric switch box.
23 Electrical connections
Observe the following when performing all work:
DANGER
Danger of fatal injury due to electric
current!
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
Observe the relevant EN, VDE and/or ap-
plicable local safety regulations during the
installation and during all electrical work.
Comply with technical connection require-
ments of the responsible power supply
company (if required by the latter)!
Power connection
The power is connected at the connection boxes on
the water connection side.
1. If the unit is closed, open lower facing panel on
the water connection side.
 “16.4 Attaching the air ow ba󰀪es”, page 11,
point 1
2. Open connection boxes.
1 Connection box for electric heating element
2 Connection box for compressor
3. Connect power cable to the connection box.
4. Close connection box.

16 Subject to change without notice | 83054200iUK | ait-deutschland GmbH
The unit is now closed.
24 Rinsing, lling and bleeding
the system
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).
2. Guide control and sensor wires inside the unit
through the provided cable duct to the water con-
nection side.
1 Cable duct for control and sensor wires
3. Guide control and sensor wires out of the unit.
NOTE
In order to enable unhinging of the electric
switch box in the event that customer service
is necessary, the control and sensor wires in
the heat pump must have an excess length of
about 15 cm.
4. Install control and sensor wires in a conduit as far
as where they enter the building and from there
on to the heating and heat pump regulator.
5. Connect control and sensor wires to the heating
and heat pump regulator according to the terminal
connection diagram and the circuit diagrams for
the respective model.
 “Terminal diagram”, page 35, and “Circuit dia-
grams“, from page 36, for the respective model
 Operating manual of the heating and heat pump
regulator
6. Seal empty pipes on unit side.
7. Screw facing panels onto the heat pump.
Place lower facing panels diagonally into the
frame, close at top and fasten with in quick-re-
lease screws.

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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
heating circuit.
The heat pumps have safety devices that prevent
the water from freezing, even when the heating is
switched o󰀨. A prerequisite is that the heat pump re-
mains 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 compo-
nents used with the antifreeze mixture must be
ensured
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.
Rinsing, lling and bleeding
1. Rinse and ll the heating circuit and bleed it at the
highest point.
2. In addition, open the bleeding valve on the con-
denser of the heat pump. Bleed condenser.
25 Insulating the hydraulic
connections
Insulate hydraulic lines in accordance with the local
regulations.
1. Open shut-o󰀨 devices.
2. Perform a pressure test and check for leaks.
3. Insulate the vibration decouplers and the outside
pipes of the heating circuit so that they are sealed
against vapor di󰀨usion.
4. Insulate all connections, ttings and pipes.
5. Insulate the condensate drain in a frost-proof
manner.
6. The unit must be completely closed on all sides to
ensure rodent protection.
26 Set the overow valve
REMARQUE
The activities in this section are only neces-
sary for in-line tank integration.
Complete the worksteps quickly, otherwise
the maximum return temperature can be ex-
ceeded and the heat pump switches to high-
pressure fault.
Turn the adjusting knob at the overow valve
to the right to increase the temperature di󰀨er-
ence (the temperature drop), turn it to the left
to reduce it.
System is running in heating mode (ideally in cold
condition).
1. In case of low heating curve: Set the system to
“Forced heating”.
 Operating manual of the heating and heat pump
controller
2. Shut o󰀨 valves to the heating circuit.
3. Ensure that the total ow is routed via the over-
ow valve.
4. Read out the ow and return temperature at the
heating and heat pump controller.
 Operating manual of the heating and heat pump
controller

18 Subject to change without notice | 83054200iUK | ait-deutschland GmbH
27 Commissioning
DANGER
Prior to commissioning the unit, the air
ow ba󰀪es must be mounted and the
facing panels 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 supply
(compressor) is ensured.
• The heat pump installation and assembly
have been carried out according to the
requirements of this operating manual.
• the electrical installation work has been
completed properly.
• The power supply for the heat pump must be
equipped with an all-pole automatic circuit-
breaker with at least 3 mm contact spacing to
IEC 60947-2.
• The heating circuit is ushed, lled and
thoroughly vented.
• All valves and shut-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.
5. Turn the adjusting knob (①) of the overow valve
(②) until the temperature drop between the ow
and return temperature is set as follows:
External temperature Recommended settings
-10 °C 4 K
0 °C 5 K
10 °C 8 K
20 °C 9 K
30 °C 10 K
6. Open valves to heating circuit.
7. Reset the heating and heat pump controller.

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28.1 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.
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.
28.2 Cleaning and rinsing of unit
components
CAUTION
Unit components may be cleaned and
rinsed only by customer service personnel
authorized by the manufacturer. Use only
liquids recommended by the manufacturer.
Rinsing of the liqueer with chemical
cleaning agents must be followed by neu-
tralization of residue and intensive rins-
ing with water. Always observe the techni-
cal data of the manufacturer of the heat ex-
changer.
4. The heat pump system is commissioned by cus-
tomer service personnel authorised by the manu-
facturer. There is a fee for starting up!
28 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 as well as
cleaned as needed - at the very least annually - by a
qualied heating or cooling system technician.
IMPORTANT
Check regularly to ensure that the conden-
sate 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 ob-
structions and clean as needed.
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
When temperatures fall below freezing and high lev-
els of humidity are present, ice can form on the pro-
tective grating of the air ow ba󰀪es. In order to ensure
problem-free operations, the ice must be removed on
a regular basis.

20 Subject to change without notice | 83054200iUK | ait-deutschland GmbH
30 Dismantling
DANGER
Danger of fatal injury due to electric
current!
Electrical connections may be installed
only by qualied electricians.
Before opening the unit, disconnect the
system from the power supply and secure
it from being switched back on!
WARNING
Only qualied heating or cooling system
technicians are allowed to remove the unit
from the system.
IMPORTANT
Recycle or provide for proper disposal of unit
components, refrigerants and oil in accord-
ance with the applicable regulations, stand-
ards and directives.
30.1 Removal of the bu󰀨er battery
IMPORTANT
Before scrapping the heating and heat pump
regulator, remove the bu󰀨er battery on the
processor board. The battery can be pushed
out using a screwdriver. Dispose of battery
and electronic components in keeping with
environmental considerations.
29 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
WARNING
Service and repair work on the compo-
nents of the unit may be performed only by
customer service personnel authorized by
the manufacturer.
NOTE
If the safety temperature limiter on the
electric heating element (depending on unit
model) has tripped, no fault is displayed.
29.1 Unlock the safety temperature
limiter
A safety temperature limiter is installed in the electric
heating element (depending on unit model). If the heat
pump fails or there is air in the system:
►Check whether the reset button (②) of the safe-
ty temperature limiter (①) has jumped out (by ap-
prox. 2 mm).
► Press the reset button (②) back in again.
► If the safety temperature limiter trips again, con-
tact the local partner of the manufacturer or the
factory‘s customer service.