UK
83053700kUK – Translation of the original operating manual
Brine/Water Heat Pumps
Professional
Operating Manual
SWP
2
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
1 Please read rst
This operating manual provides important information
on the handling of the unit. It is an integral part of the
product and must be stored so that it is accessible
in the immediate vicinity of the unit. It must remain
available throughout the entire service life of the unit.
It must be handed over to subsequent owners or users
of the unit.
In addition to this operating manual, you must also
have the operating manual for the heating and heat
pump regulator and the operating manual for your heat
pump.
Read the operating manual before working on or
operating the unit. This applies in particular to the
chapter on safety. Always follow all instructions
completely and without restrictions.
It is possible that this operating manual may contain
instructions that seem incomprehensible or unclear. In
the event of any questions or if any details are unclear,
contact the factory customer service department or
the manufacturer’s local partner.
Since this operating manual was written for several
dierent 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 condentially. The information
contained herein is protected by copyright. No part of
this manual may be reproduced, transmitted, copied,
stored in electronic data systems or translated into
another language, either wholly or in part, without the
express written permission of the manufacturer.
2 Symbols
The following symbols are used in the operating
manual. They have the following meaning:
Information for uers.
Information or instructions for qualied
technicians.
DANGER!
Indicates a direct impending danger
resulting in severe injuries or death.
WARNING!
Indicates a potentially dangerous situation
that could result in serious injuries or
death.
CAUTION!
Indicates a potentially dangerous situation
that could result in medium or slight
injuries.
ATTENTION
Indicates a potentially dangerous situation,
which could result in property damage.
NOTE
Emphasized information.
€
ENERGY SAVING TIP
Indicates suggestions that help to save en-
ergy, raw materials and costs.
Reference to other sections of the operating
manual
Reference to other documents of the manufac-
turer
3
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
Table of contents
1 Please read rst ..................................................2
2 Symbols ..................................................................2
3 Intended use .........................................................4
4 Disclaimer ..............................................................4
5 EC conformity .......................................................4
6 Safety .......................................................................4
7 Customer service ...............................................5
8 Warranty / Guarantee ........................................5
9 Disposal ..................................................................5
10 Operating principle of heat pumps .............5
11 Area of utilisation ................................................5
12 Heat metering ....................................................... 6
13 Operation ................................................................6
14 Cooling ....................................................................6
15 Care of the unit ....................................................7
16 Maintenance of the unit ...................................7
16.1 Cleaning and ushing
of unit components ........................................8
17 Malfunctions ..........................................................8
18 Scope of delivery ................................................8
18.1 Main components ...........................................9
19 Installation ..............................................................9
19.1 Installation area ..............................................9
19.2 Transport to installation location ................10
19.3 Installation .....................................................10
20 Installation of the hydraulic
connections ......................................................... 11
20.1 Buer tank ..................................................... 11
20.2 Domestic water heating .............................. 11
20.3 Domestic hot water tank ............................. 11
20.4 Installing the housing ...................................13
21 Electrical connections ....................................15
22 Installation of the control element ............. 17
23 Flushing and lling the unit ..........................18
23.1 ushing and lling the heat source ............18
23.2 ushing and lling the heating circuit ........ 18
24 Insulating the hydraulic connections .......20
25 Commissioning ..................................................21
26 Dismantling .......................................................... 21
Technical data / scope of delivery ............22
Brine operation .......................................................22
Water operation ......................................................24
Performance curves ........................................ 26
Brine operation .......................................................26
SWP 371 .............................................................26
SWP 451 .............................................................27
SWP 581 .............................................................28
SWP 691 .............................................................29
SWP 291H ..........................................................30
SWP 561H ..........................................................31
Water operation ......................................................32
SWP 371 .............................................................32
SWP 451 .............................................................33
SWP 581 .............................................................34
SWP 691 .............................................................35
SWP 291H ..........................................................36
SWP 561H ..........................................................37
Dimensional drawings ....................................38
SWP 371 – SWP 691 .............................................38
SWP 291H – SWP 561H .......................................40
Wallbracket for control unit ...................................42
Installation plans ...............................................44
Installation plan 1 ...................................................44
Installation plan 2 ...................................................45
Hydraulic integration........................................46
Legend hydraulic integration ................................47
Terminal diagram ..............................................48
Circuit diagrams ................................................49
SWP 371 / SWP 451 ..............................................49
SWP 581 / SWP 691 / SWP 561H ....................... 52
SWP 291H ...............................................................55
EC Declaration of Conformity .....................59
4
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
3 Intended use
The unit may be used only for the intended purpose.
This means:
● For heating
● For domestic water heating
● For cooling (active + passive through external hy-
draulics)
The unit may be operated only within its technical
parameters.
Overview “Technical data / scope of delivery”
NOTE
Notify the responsible power supply company
of the use of a heat pump or heat pump
system.
4 Disclaimer
The manufacturer is not liable for losses resulting from
any use of the unit which is not its intended use.
The manufacturer’s liability also expires:
● If work is carried out on the unit and its compo-
nents contrary to the instructions in this operat-
ing manual
● If work is improperly carried out on the unit and its
components
● If work is carried out on the unit which is not de-
scribed in this operating manual, and this work
has not been explicitly approved by the manufac-
turer in writing
● If the unit or components in the unit have been
altered, modied or removed without the explicit
written consent of the manufacturer
5 EC conformity
The unit bears the CE mark of conformity.
EC declaration of conformity
6 Safety
The unit is safe to operate for its intended use. The
construction and design of the unit conform to current
state of the art standards, all relevant DIN/VDE
regulations and all relevant safety regulations.
Every person who performs work on the unit must
have read and understood the operating manual prior
to starting any work. This also applies if the respective
person has already worked with such a unit or a similar
unit or has been trained by the manufacturer.
Every person who performs work on the unit must
comply with the applicable accident prevention and
safety regulations. This applies in particular to the
wearing of personal safety gear.
DANGER!
Risk of fatal injury due to electric shock!
All electrical connections must be carried
out by qualied electricians only.
Before opening the unit, disconnect the
system from the power supply and prevent
it from being switched back on!
WARNING!
Only qualied personnel (trained heating,
cooling and refrigerant engineers and
electricians) may carry out work on the
unit and its components.
WARNING!
Observe safety labels on and in the unit.
WARNING!
Unit contains refrigerants!
Leaking refrigerant could result in personal
injury or material damage. Therefore:
– Switch o unit
– Thoroughly ventilate installation room
– Notify the manufacturer’s authorised
service centre
CAUTION.
For safety reasons:
Never disconnect the unit from the power
supply, unless the unit is being opened.
ATTENTION
Use of pure water in a at-plate collector or a
borehole heat exchanger (vertical collector) is
not permitted
.
5
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
7 Customer service
For technical assistance, please contact your qualied
technician or the manufacturer’s local service partner.
For a current list and additional partners of the manu-
facturer, please visit
DE: 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 about all matters
concerning warranties and guarantees.
9 Disposal
When decommissioning the old unit, always comply
with local applicable laws, directives and standards
concerning the recovery, recycling and disposal of
materials and components of cooling units.
“Dismantling”
10 Operating principle of heat
pumps
Heat pumps operate on the same principle as a
refrigerator: same technology, only with reversed
benets. 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
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 utilisation
Taking into consideration the ambient conditions, limits
of application and the applicable regulations, every
heat pump can be utilised in new or existing heating
systems.
Overview “Technical data / scope of delivery”
6
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
12 Heat metering
In addition to proof of the unit’s eciency, the
EEWaermeG also requires heat metering (hereafter
referred to as HQR). Heat metering is mandatory for
air/water heat pumps. Heat metering for brine/water
and water/water heat pumps only have to be installed
for a ow temperature ≥ 35 °C. The heat metering must
record the total thermal energy released (heating and
domestic hot water) in the building. In heat pumps
with heat metering, the analysis is carried out by the
regulator. The regulator displays the thermal energy
discharged in 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 environment through low emissions and reduced
primary energy use.
To ensure that your heat pump or heat pump system
operates eciently 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 eciency of the system.
€
ENERGY SAVING TIP
Preferably use purge ventilation. Compared
to continuously open windows, it is better to
air rooms by fully opening windows for a short
period, two to three times a day (so-called
“rapid” or “purge” ventilation); this reduces
energy consumption and your heating bill.
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
correct.
Operating manual of the heating and heat
pump regulator
14 Cooling
There are two ways to use the heat pump for air con-
ditioning in rooms, through: „passive cooling“ and „ac-
tive cooling“.
The main dierence is the compressor operation.
While the compressor is not needed for passive cool-
ing, i.e. it is passive, the compressor operates during
active cooling, i.e. it is active.
Another dierence is that both passive and active
cooling is possible with the ground and groundwater
heat sources. But only active cooling is possible with
the outside air heat source.
Passive cooling is the more cost-eective option. Low-
ering the temperature by 3-4 K is often fully sucient
to produce a comfortable room temperature in the
summer.
Whereas higher cooling output is possible with active
cooling.
Passive cooling uses the fact that the ground and
groundwater, from a depth of around 8 metres, are
more or less a constant temperature all year round
and in the summer are around 9 °C to 10 °C cooler
than the outside air or the interior rooms.
This temperature dierence is sucient to cool a build-
ing with energy from the ground and groundwater. Ad-
ditional fan coils, cooling ceilings, underoor heating
and thermo active building systems (embedding cool-
ing pipes), such as concrete core thermal activation,
can be used for direct cooling.
ATTENTION
By cooling with low ow temperatures, con-
densate can be expected to form on the heat
distribution system as the temperature falls
below the dew point. If the heat distribution
system is not designed for these operating
conditions, it must be protected by appro-
priate safety devices, e.g. dew point monitor
(purchasable accessory).
NOTICE
If the heating surfaces are used for heating
and cooling, the control valves must be suita-
ble for heating and cooling.
In addition, a dew-point monitor should be
used for cooling.
NOTE
Use recommended accessory dew point
monitors.
7
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
The room thermostat of the cooling function
(purchasable accessories, optional)
The room thermostat is used to release and to switch
o the cooling function:
I Cooling function switched on
Cooling function o
USE OF THE COOLING FUNCTION
The heating and heat pump regulation program acti-
vates the cooling function only if the following condi-
tions are fullled:
● Heat pump type with integrated cooling function
● Room thermostat of the cooling function is
switched on
● Temperature of the heat source is ≥ +5 °C
● Heat pump is currently not being used for „heat-
ing“ nor for „domestic water heating“. If the heat
pump control program sends the “domestic wa-
ter heating” request to the heat pump, the cool-
ing function of the heat pump stops automati-
cally for the duration of the domestic water heat-
ing
● The „Automatic“ setting is selected under the
„Cooling mode“ heading
● The outside temperature release set at the con-
trol is exceeded
Operating manual of the heating and heat
pump regulator
The cooling function can be used in two variants:
Variant 1:
Manual switching from heating to cooling mode
(and vice versa). This uses a xed pre-set ow
temperature.
Operating manual of the heating and heat
pump controller.
Variant 2:
Automatic switching from heating to cooling
mode (and vice versa). This variant can operate
using a cooling curve.
NOTE
Variant 2 is only possible if the expansion
board (purchasable accessories) is installed
in the heating and heat pump controller.
Expansion board operating manual
15 Care of the unit
The outer surfaces of the unit can be cleaned with a
damp cloth and standard 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.
16 Maintenance of the unit
The cooling circuit of the heat pump requires no regu-
lar maintenance.
According to EU regulation (EC) 517/2014, leak
inspections and maintenance of a log book are
required by law for certain heat pumps!
Log book for heat pumps, Section “Information
on use of the log book”
The components of the heating circuit and the heat
source (valves, expansion vessels, circulating pumps,
lters, dirt traps) should be inspected and cleaned
as needed - at the very least annually - by qualied
personnel (heating or cooling system tters).
It is best to arrange a maintenance agreement with
a heating installation company. The company will
arrange for the required maintenance at regular
intervals.
8
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
16.1 Cleaning and ushing
of unit components
CAUTION!
Unit components may be cleaned
and ushed only by customer service
personnel authorised by the manufacturer.
Use only liquids recommended by the
manufacturer.
Flushing of the liqueer with chemical
cleaning agents must be followed by
neutralisation of residue and intensive
ushing with water. Always observe the
technical data of the manufacturer of the
heat exchanger.
17 Malfunctions
In the event of a fault, you can read out the cause of
the fault from the diagnostic program of the heating
and heat pump regulator.
Operating manual of the heating and heat
pump regulator
WARNING!
Only customer service personnel
authorised by the manufacturer may
carry out service and repair work on the
components of the unit.
18 Scope of delivery
Example of scope of delivery:
Size 1
1 Heat pump = complete indoor unit
2 Facing panels
*)
placed to the side
3 Transport frame
4 Prole rails
5 Insulation panel, which is then pushed under
the baseplate (sound insulation)
6 Facing panels placed to the side (5 panels)
7 Extra box with accessories (indoors)
8 Pre-tted adjustable feet (4)
9 Spacer blocks (4), which can be unscrewed
after installation
*)
a total of 5 panels
Complete the following rst:
Check the delivery for outwardly visible signs of
damage.
Check that nothing is missing from the scope of
supply.
Any defects or incorrect deliveries must be
reported immediately.
NOTE
Note the unit model.
Overview “Technical data / scope of delivery”
9
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
18.1 Main components
1 condenser
2 compressor
3 evaporator
19 Installation
Observe the following when performing all work:
NOTE
Always comply with the applicable local
accident prevention regulations, statutory
regulations, ordinances, guidelines and
directives.
WARNING!
The heat pump or heat pump system
may only be installed and assembled by
qualied personnel!
NOTE
Observe the sound levels of the respective
model.
Overview “Technical data / scope of delivery”,
“Sound” section
19.1 Installation area
ATTENTION
Install the heat pump only indoors.
The installation room must be frost-free and
dry.
WARNING!
Please note and follow the respective
relevant local standards, directives and
regulations applicable, especially the
minimum volume necessary depending on
the refrigerant capacity of the relevant heat
pump system (EN 378-1).
Refrigerant Limit
R 134a 0,25 kg/m³
R 404A 0,48 kg/m³
R 407C 0,31 kg/m³
R 410A 0,44 kg/m³
Overview “Technical data / scope of delivery”,
“General unit data” section
Minimum room volume =
Refrigerant capacity [kg]
Limit [kg/m³]
NOTE
If several heat pumps of the same type
are installed, only one heat pump must be
considered.
If several heat pumps of dierent types are
installed, the heat pump with the largest
refrigerant capacity must be considered.
10
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
19.2 Transport to installation location
Before transporting the heat pump to the nal
installation location the packaging and wooden
frame can be dismantled.
To do this, remove the facing panels on the long
sides, undo the wooden boards and remove the
two machine screws (M8) in each of the sides.
You can now lift the unit with the help of a pallet
truck or fork lift truck and transport it to its nal
installation location.
NOTE
The unit has ground clearance for easy
access from all sides
NOTE
The baseplate is 76 cm wide, so that the heat
pump can be transported through a standard
door opening.
NOTE
Keep the components enclosed in the scope
of delivery in a safe place until the assembly.
Always comply with the following safety information
during transport:
CAUTION!
Wear safety gloves.
WARNING!
Several people are required to transport
the unit. Do not underestimate the weight
of the unit.
Overview “Technical data / scope of delivery”,
“General unit data” section
ATTENTION
Never use components and hydraulic
connections on the unit for purposes of
transport.
ATTENTION
Do not tilt the unit more than a maximum of
45° (in any direction).
19.3 Installation
WARNING!
Several people are required to install the
unit.
NOTE
Take into account the size of the unit.
Overview “Technical data / scope of delivery”,
“General unit data” section
NOTE
Always follow the installation plan for the
respective model. Note the size and minimum
clearances.
Installation plan for respective model
ATTENTION
The heat pump must be installed on a rm,
horizontal surface. Make sure that the
foundation is designed for the weight of the
heat pump.
Do not use a rigid foam boiler pedestal!
Overview “Technical data/scope of delivery”,
“General unit data” section
NOTE
Set up the unit so that the operating side is
accessible at all times!
ATTENTION
Do not tilt the unit more than a maximum of
45° (in any direction).
11
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
Lower the basic heat pump module on the 4
wooden transport blocks in its nal installation
location. Now use the vibration-decoupling,
adjustable machine feet to align the unit
horizontally. Ensure the distance from the nished
oor level to the top of the heat pump baseplate is
170 mm. Lock this setting by locking the nuts.
The four transport blocks (each with 2 universal
wood screws) must then be removed.
20 Installation of the hydraulic
connections
20.1 Buer tank
The hydraulic connection of the heat pump requires a
buer tank in the heating circuit. The required volume
of the buer tank is calculated based on the following
formula:
minimum ow rate of heat circuit
volume ow / hour
10
V
Buer tank
=
For the minimum ow rate of the heat circuit
volume ow, see overview “Technical data/
Scope of delivery”, “Heating circuit” section
20.2 Domestic water heating
The domestic water heating with the heat pump
requires an additional hot water circuit, parallel to the
heating circuit. When installing, make sure that the
domestic hot water charge is not fed through the buer
tank of the heating circuit.
“Hydraulic connection” instructions
20.3 Domestic hot water tank
If the heat pump is to be used for domestic water
heating, you must integrate special domestic hot water
tanks in the heat pump system. Choose a storage
volume so that the required quantity of hot water is
available even during a power cut.
NOTE:
The heat exchanger surface of the domestic
hot water tank must be dimensioned so that
the heating capacity of the heat pump is
transferred with minimum spread.
We oer a variety of domestic hot water tanks for you
to choose from. They are optimised for use with your
heat pump.
ATTENTION
Connect the unit to the heating circuit
according to the hydraulic diagram for the
respective model.
“Hydraulic connection” instructions
12
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
ATTENTION
The heat source system must be designed
according to the specications of the planning
manual.
Planning manual and “Hydraulic connection”
documents
NOTE:
Check to make sure that the diameters and
lengths of the pipes for the heating circuit and
the heat source are suciently dimensioned.
NOTE:
Circulating pumps, which pump the volume
ow through the heat pump, must be
designed as multi-stage pumps. They must
at least provide the minimum throughput rate
required for your model.
In the case of heat source pumps, the
viscosity of the brine liquid must also be
taken into account!
Overview “Technical data / scope of delivery”,
“Heat circuit” and “Heat source” sections
ATTENTION
The hydraulic system must be equipped with
a buer tank, the required volume of which
depends on the model of your unit.
ATTENTION
When installing the connections, always
secure the connections on the unit against
twisting, in order to prevent damage to the
components inside the unit.
The following steps are to be carried out on all 4
hydraulic connections of the heat pump:
Push the insulation elements included in the
scope of delivery onto the plate heat exchanger.
Position the back panel of the heat pump on the
basic heat pump module.
Connect the piece of pipe supplied to the threaded
ange and insulate it with the enclosed insulating
hose.
Connect the connectors to the connection
clip included in the scope of supply to the
corresponding connection on the heat pump.
13
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
Use the insulating tape supplied to insulate the
connection clip. Use the enclosed fastening
materials to additionally x the insulation.
NOTE:
We recommend completing step after the
leak test.
NOTE:
The heat source and heating side must be
insulated from the heat pump; to this end
we recommend using the IPFK hydraulic
connection set in our range of products (not
included in the scope of delivery).
Install shut-o devices at the heating circuit.
Install shut-o devices at the heat source.
Place a bleeder at the highest point of the heat
source in the heat source outlet.
We recommend installing a dirt lter (screen size
0.9 mm) on the heat source inlet connection.
The hot water and heat source connections are
marked accordingly on the unit.
For the positioning of the connections, please
refer to the dimensioned drawing for the re-
spective model
20.4 Installing the housing
NOTE
Remove the protective lm from all facing
panels.
NOTE
The screws for installing the heat pump
housing are included in the scope of delivery.
Position the insulation included in the scope of
delivery under the baseplate.
NOTE
Before screwing on the side panels, feed the
patch cable and + LIN bus cable through the
rear panel!
see “electrical connection work”
Screw the two side panels onto the back panel
using 3 screws for each.
Mount the prole rail onto the front of the unit,
between the two side panels, using 2 screws for
each side.
1 Screw
2 Prole rail
14
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
Align the facing with the baseplate as shown in
the following sketch
28
28
28
Secure and x the facing on the prole rail using
the fastening materials included in the scope of
delivery (2 x 10mm anchors and 2 x M8 hanger
bolts). Twist the hanger bolt into the oor up to the
start of the thread.
1 hanger bolt with anchor
Align the insulating board under the unit with the
middle of the unit (see ).
Fix the housing cover onto the rear panel (5
screws).
And the two side panels (2 screws each) onto the
front.
The front panel can now be hung into the clips
provided at the bottom
and locked by means of the two quarter-turn
screws.
Glue the insulating half-shells included in the
scope of delivery around the pipe pieces in the
rear panel.
15
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
21 Electrical connections
The following applies to all work to be done:
DANGER!
Risk of fatal injury due to electric shock!
All electrical connections must be carried
out by qualied electricians only.
Before opening the unit, disconnect the
system from the power supply and prevent
it from being switched back on!
WARNING!
During installation and while carrying out
electrical work, comply with the relevant
EN-, VDE and/or local safety regulations.
Comply with technical connection
requirements of the responsible power
supply company (if required by the latter)!
NOTE
All cables must be fed through the openings
in the back panel!
The front panel is hung in at the bottom and is
held in place at the top by 2 quarter-turn screws.
1 Quarter-turn screws
Open the quarter-turn screws of the front panel by
turning them through 90° anticlockwise.
Lift out front panel and set aside in a safe place.
Open the unit’s electrical switch cabinet.
1 Electrical switch cabinet
Undo the 6 screws slightly, in order to unhook the
cover panel by lifting it slightly.
Several openings are provided at the back of the
unit for passing through the cables.
NOTE
When laying the cable, ensure that unshielded
power supply cables and shielded cables
(LIN bus) are laid separately from each other.
NOTE
LIN bus length may not be increased.
However, they can be shortened.
For further details, see “installation plan”
1 Electric cable penetration
2 Penetration, LIN bus and patch cable for the
heating and heat pump regulator
16
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
The external electric cables to be provided must be fed
through the grommets cut out in the bottom of the rear
panel and then fed into the electrical switch cabinet by
means of the cable duct, which is integrated into the
baseplate of the heat pump.
1 Cable duct
The cables laid in the switch cabinet for the regulator
(patch cable, LIN bus) must be fed through the
grommet cut out in the bottom of the rear panel.
Make electrical connections according to the
terminal diagram.
“Terminal diagrams” for respective model
ATTENTION
Ensure clockwise rotary eld of the load
power supply (compressor).
Operation with the incorrect rotary direction
of the compressor can cause serious,
irreparable damage to the compressor.
ATTENTION
The power supply for the heat pump must be
equipped with an all-pole automatic circuit-
breaker with at least 3mm contact spacing to
IEC 60947-2.
Note the level of the tripping current.
Overview “Technical data / scope of delivery”,
“Electrics” section
1 Control voltage connection
2 Compressor output connection
3 Regulator board
NOTE
The control element of the heat and heat
pump regulator can be connected to a
computer or network using a suitable network
cable, enabling the heating and heat pump
regulator to be controlled remotely from there.
If such a connection is required, lay a
shielded network cable (category 6, with
RJ-45 connector) up to the control element
while carrying out the electrical connection
work.
After completion of all electrical installation work,
close the switch cabinet inside the unit.
Screw on the front panel of the unit if no further
installation work inside the unit is to be performed
immediately.
17
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
22 Installation of the control
element
The separate package contains:
1 wall bracket
2 control unit
3 cover
1. The cables are laid either through the wall (e.g.
ush cable box) or from underneath.
When routing cables from underneath, you must
break out the plastic strip (hatched area) on the
wall bracket.
ATTENTION
Mount the wall bracket with control panel
only vertically on a wall!
2. Fasten the wall bracket using the 3 screws (plus
dowels) included in the scope of delivery.
see dimensional drawing “Wallbracket for con-
trol unit”
3. Plug the control unit onto the wall bracket.
Connections
The connections are located on the underside of the
control unit:
1 Connection room control unit
RBE RS 485 (accessory)
2 RJ45 connection cable to the network link
3 Connection LIN bus to the regulator board
4 RJ45 connection regulator board
NOTE
A connection to a computer or a network can
be made via socket 2, in order to enable the
heating and heat pump controller to be con-
trolled remotely from there. This requires a
shielded network cable (category 6).
Operating manual for the heating and heat
pump controller, “Skilled installer” version,
“Web server” section
NOTE
The network cable can be retrotted at any
time. However, in order to connect it, the
cover must be removed rst.
18
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
If the connection work has been completed, the
cover can be tted onto the wall bracket.
23 Flushing and lling the unit
CAUTION.
The system must be absolutely free from air
before commissioning.
23.1 ushing and lling the heat source
Contamination and deposits in the heat source can
cause malfunctions.
ATTENTION
For operation of the heat source with water
or a water-antifreeze mixture, ensure that the
water fulls the quality specications of the
heating water side.
ATTENTION
Before ushing and lling the heat source
the drain pipe of the safety valve must be
connected. Important: do not discharge into
the drains (anti-freeze mixture)!.
NOTE
The following antifreezes mixed with water
are approved for the brine circuit:
● Monopropylene glycol
● Monoethylene glycol
● Ethanol
● Methanol
ATTENTION
Ensure that the (pipe) materials, seals and
other components used on site are made of
materials that are compatible with the anti-
freeze used!
WARNING!
Methanol and ethanol can evaporate, giv-
ing o ammable and explosive gases.
Therefore, the relevant antifreeze safety
regulations must be noted and followed!
Flush heat source system thoroughly.
Thoroughly mix the anti-freeze, available as an
accessory, with water with the required ratio.
Add only anti-freeze mixed with water to the heat
source.
ATTENTION
The concentration of anti-freeze in the water
must be at the level specied for your model.
Overview “Technical data / scope of delivery”,
“Heat source” section
Check the concentration of the anti-freeze in the
mixture.
Fill heat source with the anti-freeze mixture.
Bleed the heat source.
23.2 ushing and lling the heating
circuit
Water quality
of the ll and additional water in hot water
heating systems according to VDI 2035 Part
I and II
Use of modern, energy-ecient heat pump systems
is becoming increasingly widespread. Their ingenious
technology enables these systems to achieve very
good eciencies. The decreasing space available for
heat generators has led to the development of compact
units with increasingly smaller cross-sections and high
capacities. This means the complexity of the systems
and the material diversity are also increasing, which
plays an important role especially in their corrosion
behaviour. The heating water not only aects the
eciency 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
19
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
trouble-free running of the systems is achieved with
so-called low-salt operation.
VDI 2035 Part I gives important information and
recommendations regarding scaling and its prevention
in heating and domestic hot water heating systems.
VDI 2035 Part II primarily deals with the requirements
for reducing heating water corrosion in hot water
heating systems.
Principles of Part I and Part II
The occurrence of scaling and corrosion damage in
hot water heating systems is low, if
● proper planning and commissioning is carried out
● the system is closed in corrosion terms
● adequately dimensioned pressurising is inte-
grated
● the guide values for the heating water are com-
plied with
● and regular servicing and maintenance are car-
ried 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 ex-
changers)
● cross-section reduction and blockaging of compo-
nents (e.g. heat exchanger, pipes, pumps)
● Material fatigue
● gas bubbles and gas cushion formation (cavita-
tion)
● negative eect on heat transfer (formation of coat-
ings, 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 eciency falls
and the energy costs rise. A rule of thumb is that 1
millimetre of limescale deposit causes an energy loss
of 10%. In extreme cases it can even cause damage
to the heat exchangers.
Water softening to VDI 2035 – Part I
If the water is softened before the heating is lled, in
accordance with the VDI 2035 guidelines, no scale
can form. This eectively and permanently prevents
limescale deposits and the resulting negative eects
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
insucient. The pH value can signicantly 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 fullled, 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 dierent materials
in the heating system and therefore accelerate
corrosion processes. This can ultimately result in
pitting.
On the safe side with low-salt operation
The problems listed above do not occur at all with
low-salt operation, as neither corrosive salts such as
sulphates, chlorides and nitrates nor alkalising sodium
hydrogen carbonate are in the heating water. The
corrosive properties of deionised water are very low
and in addition, fur cannot form in the boiler. This is the
ideal approach for closed heating circuits, in particular,
because low oxygen input into the heating circuit can
also be tolerated.
In general, when the system is lled with deionised
water, the pH value sets itself within the ideal range
due to „self-alkalinisation“. If necessary, a pH value of
8.2 can be very easily alkalised by adding chemicals.
In this way, optimum protection of the entire heating
system is achieved.
20
Subject to technical amendments without notice | 83053700kUK – Translation of the original operating manual | ait-deutschland GmbH
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.
ATTENTION
Before ushing and lling the heating circuit,
the drain pipe of the safety valve must be
connected.
Flush heating circuit system thoroughly.
Fill heating circuit.
Bleed heating circuit.
24 Insulating the hydraulic
connections
NOTE
Insulate the heating circuit and the heat
source according to relevant local standards
and guidelines.
Check all hydraulic connections for leaks. Perform
leak test.
Insulate all connections, vibration isolation,
connections and pipes of the heating circuit and
the heat source. Insulate the heat source so that it
is vapour-diusion tight.
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