STIEBEL ELTRON | LWZ 5 S Plus | Operation Instruction | Stiebel Eltron LWZ 5 S Plus Operation Instruction

Stiebel Eltron LWZ 5 S Plus  Operation Instruction
INSTALLATION
Central ventilation unit with heat recovery‌
»» LWZ 5 S Plus
‌
‌CONTENTS

SPECIAL INFORMATION
INSTALLATION
1.
1.1
1.2
1.3
General information�����������������������������������������3
Relevant documents�������������������������������������������� 3
Information on the appliance��������������������������������� 3
Standardised output data�������������������������������������� 3
2.
2.1
2.2
2.3
Safety����������������������������������������������������������4
General safety instructions������������������������������������ 4
Instructions, standards and regulations�������������������� 4
Operation of the appliance in buildings with
combustion equipment����������������������������������������� 4
3.
3.1
3.2
3.3
3.4
Appliance description���������������������������������������5
Standard delivery������������������������������������������������ 5
Required accessories������������������������������������������� 5
Additional accessories������������������������������������������ 5
Appliance functions��������������������������������������������� 5
4.
4.1
4.2
4.3
4.4
4.5
4.6
Preparation���������������������������������������������������6
Installation site��������������������������������������������������� 6
Air routing�������������������������������������������������������� 7
Sound emissions������������������������������������������������� 7
Electrical installation������������������������������������������� 8
Oxygen diffusion������������������������������������������������� 9
Transport���������������������������������������������������������� 9
5.
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
Installation�������������������������������������������������� 10
Siting the function module����������������������������������� 10
Installing the cylinder module������������������������������� 11
Connecting modules������������������������������������������� 12
Heating water connection������������������������������������� 15
Water connection����������������������������������������������� 16
Filling the DHW cylinder�������������������������������������� 16
Condensate drain and overpressure valve����������������� 16
Electrical connection������������������������������������������� 16
Filling and venting the heating system��������������������� 20
Fitting the appliance casing���������������������������������� 21
Outdoor air and exhaust air hose installation������������ 22
Installing extract air and supply air pipes����������������� 23
6.
6.1
6.2
6.3
6.4
Commissioning��������������������������������������������� 24
Checks before commissioning������������������������������� 24
Filter insertion�������������������������������������������������� 25
Commissioning via the programming unit���������������� 25
Recommissioning����������������������������������������������� 25
7.
Appliance shutdown��������������������������������������� 25
8.
8.1
8.2
8.3
8.4
Troubleshooting�������������������������������������������� 26
Exhaust air fan is catching������������������������������������ 26
Cleaning defrost pan������������������������������������������� 26
Circulation pump����������������������������������������������� 26
Fault messages in the programming unit����������������� 26
9.
9.1
9.2
9.3
9.4
Maintenance and cleaning�������������������������������� 27
Cleaning the air/air heat exchanger������������������������ 27
Cleaning the outdoor air filter������������������������������� 27
Cleaning the evaporator fins��������������������������������� 27
Cleaning the condensate drain������������������������������� 28
2 | LWZ 5 S Plus
9.5
9.6
Cleaning the filter ball valve���������������������������������� 28
Replacing the anode������������������������������������������� 29
10.
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
Specification������������������������������������������������ 30
Dimensions and connections��������������������������������� 30
Wiring diagram������������������������������������������������� 31
Connection examples������������������������������������������ 34
Application range����������������������������������������������� 34
Sensor resistance values�������������������������������������� 34
Output graph���������������������������������������������������� 35
Available external head of the circulation pump��������� 35
Fan curve��������������������������������������������������������� 36
Data table�������������������������������������������������������� 37
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Special information‌ | ‌INSTALLATION‌
General information
SPECIAL INFORMATION INSTALLATION
-- Observe all applicable national and regional regulations and instructions during installation.
-- The appliance is not approved for outdoor
installation.
-- Observe the requirements concerning the installation room (see chapter „Specification / Data
table“).
-- Observe minimum clearances (see chapter
„Preparations / Installation site“).
-- The connection to the power supply must be in
the form of a permanent connection. Ensure the
appliance can be separated from the power supply by an isolator that disconnects all poles with
at least 3 mm contact separation.
1.
General information
These instructions are intended for qualified contractors.
1.1
Relevant documents
338915‌
338916‌
1.2
Operation
Commissioning‌ /‌ Notification list
Information on the appliance
Connections
Symbol
Meaning
Inlet / intake
Drain / outlet
Heating
-- Observe the fuse protection required for the appliance (see chapter „Specification / Data table“).
Condensate
-- Drain the appliance as described in chapter
„Shutdown“.
Safety valve drain
-- Install a type-tested safety valve in the cold water
supply line.
Outdoor air
-- The maximum pressure in the cold water supply
line must be at least 20 % below the response
pressure of the safety valve. If the maximum
pressure in the cold water supply line is higher,
install a pressure reducing valve.
Exhaust air
Extract air
Supply air
-- Size the drain so that water can drain off unimpeded when the safety valve is fully opened.
-- Fit the discharge pipe of the safety valve with
a constant downward slope and in a room free
from the risk of frost.
-- The safety valve discharge aperture must remain
open to atmosphere.
1.3
Standardised output data
Information on determining and interpreting the specified standardised output data
1.3.1 Standard‌: EN 13141-7‌, ‌EN 14511‌, ‌EN 16147
The output data specifically mentioned in text, diagrams and
technical datasheets has been calculated according to the test
conditions of the standards shown in the heading of this section.
However, there is a deviation from the standard EN 14511 in the
performance specifications for inverter driven air source heat
pumps with source temperatures > -7 °C, as these are partial
load values. The associated percentage weighting in the partial
load range can be found in EN 14825 and EHPA quality label regulations.
Generally, the test conditions stated above will not fully match the
conditions found at the installation site of the system user.
Depending on the chosen test method and the extent to which
this method differs from the test conditions defined in the first
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LWZ 5 S Plus | 3
Installation
Safety
paragraph of this section, any deviations can be considerable.
Additional factors that have an influence on the test values are
the measuring equipment, the system configuration, the age of
the system and the flow rates.
Confirmation of the specified output data can only be obtained if
the test conducted for this purpose is also performed in accordance with the test conditions defined in the first paragraph of this
section.
2.
Safety
Only a qualified contractor should carry out installation, commissioning, maintenance and repair of the appliance.
2.1
General safety instructions
We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.
2.1.1 Electrical installation
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
Isolate the appliance from the power supply prior to
commencing any work in the interior of the appliance.
WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. The appliance must be able
to be separated from the power supply by an isolator
that disconnects all poles with at least 3 mm contact
separation. This requirement can be met by contactors,
isolators, fuses, etc.
!
2.2
Material losses
The specified voltage must match the mains voltage. Observe the type plate.
Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
WARNING Burns
In connection with the fire prevention regulations concerning the installation of ventilation systems, observe
all country-specific regulations and requirements. In
Germany, these are particularly the building regulation
guideline on fire prevention requirements of ventilation
systems in its applicable version.
2.3
Operation of the appliance in buildings with
combustion equipment
If the building contains combustion equipment (tiled stoves, fireplaces, etc.), approval must be obtained from the responsible flue
gas inspector. The flue gas inspector assesses whether all statutory regulations are observed. We recommended that the flue
gas inspector be involved at an early stage in the design process.
For simultaneous operation of combustion equipment and a
ventilation unit, we recommend choosing approved room sealed
combustion equipment. Planning should always include the option
of installing safety equipment (e.g. differential pressure switch).
A 5-core cable must be routed from the combustion equipment
to the appliance or to the control panel fuse box to which the
appliance is connected.
!
WARNING Injury
Ensure that no flue gas can enter the installation room
and that combustion equipment will always be supplied
with sufficient combustion air. Tested safety equipment
must be installed to monitor the chimney draught and
to switch off the ventilation unit in the event of a fault.
Requirements of the safety equipment
The equipment for differential pressure monitoring should fulfil
the following requirements:
-- Monitoring of the differential pressure between the connection piece to the chimney and the room where the combustion equipment is installed.
-- Possibility of matching the shutdown value for the differential
pressure to the minimum draught requirement for the combustion equipment.
-- Floating contact to switch off the ventilation or heat pump
function.
-- Optional connection of a temperature capturing device so
that differential pressure monitoring is only enabled when
the combustion equipment is in operation and so that unwanted shutdowns due to environmental influences can be
avoided.
Note
Differential pressure switches that use the pressure
differential between the outdoor air pressure and the
pressure in the room where the combustion equipment
is sited as a response criterion are not suitable.
ff
XD03-13/14‌: Connect the safety equipment using a floating
contact.
Triggering the safety equipment may shut down the domestic ventilation system and block the integral heat pump of the appliance.
You can determine how the appliance will behave following a
triggering of the safety equipment using the „STOVE / FIREPLACE“
parameter.
If you want the entire appliance to be switched off when the safety
equipment is triggered, you can integrate the safety of equipment
in the same way as an underfloor heating system thermostat (see
chapter „Specification / Connection examples“).
As the appliance can produce negative pressure in the installation room, we recommend using a tightly sealing door between
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Installation
Appliance description
the installation room and the living space containing combustion
equipment. If, due to its use, the installation room is connected
to the extract air system, you must also make special arrangements for a supply air vent in the installation room, to prevent
any further increase in the negative pressure in this room. The
negative pressure created by the appliance in the installation room
is heavily influenced by the pressure drop in the outdoor air line.
For this reason, the outdoor air line in particular should be as
short as possible.
Note
The maximum permissible pressure drop (see chapter
"Specification / Data table / Max. pressure drop, outdoor
air") must not be exceeded.
During regular operation, the ventilation unit promotes a balanced
air flow rate and no pressure differences occur. Do not switch
off the mechanical ventilation component of the appliance if the
combustion equipment is in operation.
!
!
WARNING Injury
If no safety equipment is installed, open the parameter
"STOVE / FIREPLACE" and select the option "N/C MONITORING". This option switches off the heat pump as soon
as mechanical ventilation is deactivated.
WARNING Injury
If you notice flue gas escaping from the combustion
equipment, switch off any air extraction appliances, e.g.
exhaust air extractor hoods, exhaust air tumble dryers,
the central vacuum cleaning system and the ventilation
unit. Interrupt any voltage supply to the ventilation unit,
including the integral heat pump, via the fuses/MCBs in
your fuse box/distribution board.
ff
Open windows and doors.
The safety equipment also switches off the DHW heating. If the
dual mode point is undershot, the emergency/booster heater for
DHW heating switches on, resulting in an increased electrical energy demand.
3.
Appliance description
The appliance comprises a function module and a cylinder module
that are supplied as separate shipping units. The wider module
with the air hose connections in the cover is the function module.
The components required for installation are in a separate carton
inside the function module packaging.
3.1
!
Standard delivery
Material losses
Never install the push-fit connectors in the DHW line.
Only install the push-fit connectors in the heating circuit.
The following are delivered with the appliance:
-- Operating instructions
-- Installation instructions
-- Commissioning instructions and message list
-- Programming unit
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-------
Outside sensor
Four adjustable feet for the cylinder module
Eight sliding blocks for easier positioning of the appliance
Hose clips to secure the air hoses
Adhesive tape to seal the inner hose to the hose connector
PE plate for connection to a geothermal heat exchanger or an
external fresh air intake
-- Fixing materials (screws, washers, etc.)
-- Two straight push-fit connectors for the hydraulic connection
of the function and cylinder modules
For connection to the heating circuit:
-- Two straight push-fit connectors
-- One filter ball valve
-- One ball valve
-- Two 90° push-fit connectors
-- Four straight pieces of pipe with G 1 union nut
3.2
Required accessories
-- Thermally insulated air hose‌, ‌4 ‌m
-- Thermally insulated wall outlet with external wall grille
3.3
Additional accessories
-- Transport aid, comprising two angled brackets with screws
for fixing to the appliance
-- Additional programming unit with wall mounted casing
-- Spare filter set
-- Diverter hood (enables the appliance to be sited in rooms
with head heights between 2.2 and 2.5 m)
-- Silencer DN 315
-- Segmented anode
-- DHW circulation pipe set
-- Filter box (for installation in round DN 160 ventilation pipes)
-- ISG: Internet Service Gateway
-- PK 10‌:‌Condensate pump
-- Safety temperature controller for underfloor heating system
-- ZKA WP‌: Condensate drain with outlet siphon
3.4
Appliance functions
The supply air fan induces outdoor air into the appliance. The
extract air fan draws stale air from the living areas into the appliance. Outdoor air and extract air are routed through particle air
filters into separate ducts of a cross-countercurrent heat exchanger. Inside the cross-countercurrent heat exchanger, the outdoor
air is heated and channelled into the living space as supply air.
The extract air cools down inside the cross-countercurrent heat
exchanger and is routed as exhaust air first through the evaporator
and then outdoors.
The cross-countercurrent heat exchanger ensures that up to 90 %
of the heat in the extract air is returned with the supply air into
the living space.
In addition, heat is extracted from the outdoor air by means of an
air source heat pump. The energy extracted from the outdoor air
in the evaporator is transferred via the condenser to the central
heating or DHW system.
LWZ 5 S Plus | 5
Installation
Preparation
In the case of low outside temperatures or high heat demand
from the central heating or DHW heating systems, the additional
heat demand is covered by an electric emergency/booster heater.
3.4.1 Frost protection for the cross-countercurrent heat
exchanger
A heat exchanger in the path of the outdoor air flow preheats
the outdoor air, and thus prevents the cross-countercurrent heat
exchanger from freezing up.
3.4.2 Buffer mode for air heating
If a heating system with a low draw-off rate and little thermal
capacity is used, e.g. air heating coil through which the domestic
ventilation flow is routed, the lower section of the DHW cylinder
can be utilised as a buffer cylinder. Excess heat can be temporarily
stored there, thereby reducing compressor cycling. This function
can be activated in the „DHW“ menu using the „DHW BUFFER
MODE“ parameter.
You can determine the operating mode by positioning the cylinder
temperature sensor.
!
Material losses
The installation room floor must be water resistant. During appliance operation, the outdoor air releases up to
50 l of condensate per day. In the case of deficient or inadequate maintenance, water may escape. We recommend
installing a drain in the floor of the installation room.
4.1.1 Minimum clearances
≥500
1980
D0000075608
≥2200
Outdoor/exhaust air connection with diverter hood
1
2
-- The room must be free from the risk of frost.
-- The floor must have sufficient load bearing capacity. In addition to the appliance weight, also take that of the cylinder
content into account.
-- The substrate must be horizontal, level, solid and permanent.
-- When installing the appliance inside a boiler room ensure
that the boiler operation is not impaired.
-- The quantity of refrigerant makes it necessary to observe
the minimum volume of the installation room (see chapter
„Specification / Data table“).
1 Cylinder temperature sensor - upper position
2 Cylinder temperature sensor - lower position
Preparation
4.1
Installation site
To be able to open the front door freely, maintain a minimum
clearance on the r.h. side and in front of the appliance. The required room height depends on whether the reversing hood is
used or whether the hoses are connected directly (see chapter
„Installation site / Minimum clearances“). Maintain a minimum
clearance on the r.h. side of the appliance for service work.
D0000039681
4.
≥600
If the cylinder temperature sensor is in the lower position, the
entire cylinder content is always maintained at the required DHW
temperature.
≥100
If the cylinder temperature sensor is in the upper position, approx.
100 l water are always maintained at the required DHW temperature. The remaining cylinder capacity is used as a heating water
buffer and have a temperature corresponding to the heating flow
temperature.
Never install the appliance in wet rooms.
The room in which the appliance is to be installed must meet the
following conditions:
6 | LWZ 5 S Plus
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Installation
Preparation
Outdoor air mechanical ventilation connection option
R
≥1000
Outdoor/exhaust air connection with air hose
36
5
D0000039684
≥500
2255
≥2500
1
≥300
≥100
1 Filter box
D0000039682
≥600
4.2
Connecting outdoor air to geothermal heat exchanger
Air routing
Prevent air stream „short circuits“. The air intake and discharge
apertures in the external walls should be arranged around corners. When installing the air intake and discharge apertures on
the same side of the building, maintain a minimum clearance of
at least 2 m between apertures. Where that is impossible, create
a separation between the air streams, e.g. by a separating wall or
shrubs between the intake and discharge apertures.
Never align the apertures toward neighbouring living room or
bedroom windows.
4.3
Sound emissions
Sound insulation for rooms adjacent to the installation room
The appliance is quiet in normal operation. When operating at
its application limits under full load, sound emissions can occur
due to the power density. These sound emissions may cause a
disturbance in neighbouring rooms. This is especially the case if
the installation room adjoins a living room or bedroom. To prevent
noise pollution, sound attenuation measures are necessary, e.g.
sound attenuation of a higher standard for the internal wall. Pipe
fixings and wall outlets must have structure-borne noise attenuation. For the wall between the installation room and the living
space, we recommend a wall structure that ensures the following
sound-absorbing coefficient:
-- 45 dB(A) for adjacent living rooms and bedrooms
-- 40 dB(A) for other rooms
1
Doors should be of noise protection class SK 3.
≥300
1 Filter box
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D0000039683
≥2°
If the unit backs onto an adjacent room, we recommend the following sound-absorbing coefficient:
-- 55 dB(A) for adjacent living rooms and bedrooms
-- 50 dB(A) for other rooms
A passage to the neighbouring room is not recommended.
LWZ 5 S Plus | 7
Installation
Preparation
The floor between the installation room and living areas must
have carefully applied anti-vibration separation. Ensure that no
pipes are routed on or in the wall and that the air ducts have
anti-vibration separation.
If the unit installation room is included in the building ventilation
system, the design must include an extract air vent and supply
air vent for this room. To avoid the need for an overflow aperture
in the door, the supply air and extract air flow rates must be
balanced.
Anti-vibration separation
With the anti-vibration feet, it is possible to install the appliance
on floating screed, as long as this has been applied correctly. If
necessary provide separation.
If the appliance is positioned on a wooden beam ceiling, you must
take special steps to prevent structure-borne noise transmission.
Installation on foundations
Note
The unit can seem loud if operated in an unfinished building without doors. This is because the fixtures and fittings
which will provide sound attenuation are not yet in place;
once the building is occupied this should no longer occur.
2
Sound attenuation measures‌45‌dB(A)
3 4
2
1
26_04_01_0290
1
A sound-absorbing coefficient of 45 dB(A) can be achieved using,
for example, a wall of lightweight, timber frame construction with
full insulation. The cross-section of the timber supports should be
60 x 60 mm. The wall must have plasterboard panelling on both
sides, with a thickness of 12.5 mm on one side and 10 mm on the
opposite side.
1
2
3
4
Concrete base
Impact sound insulation
Floating screed
Screed recess
3
The separation can also be made later, by cutting the screed all
the way around the appliance.
2
Installation on screed with impact sound insulation
D0000047127
3
Timber frame supports 60 x 60 mm
Gypsum fibre board‌12.5‌mm
Gypsum fibre board‌10‌mm
2 3 4
Sound attenuation measures‌55‌dB(A)
A sound-absorbing coefficient of 55 dB(A) can be achieved using,
for example, a twin wall of lightweight, timber frame construction
with full insulation and 30 mm parting line. The cross-section of
the timber supports should be 60 x 60 mm. The wall must have
12.5 mm plasterboard panelling on both sides.
2
1
3
3
3
1
2
3
Parting line 30 mm
Timber frame supports 60 x 60 mm
Gypsum fibre board‌12.5‌mm
8 | LWZ 5 S Plus
1 Concrete base
2 Impact sound insulation
3 Floating screed
4 Screed recess
ff
Protect all pipe fixings and wall transitions with anti-vibration insulation.
4.4
D0000047126
3
1
26_04_01_0291
1
2
3
Electrical installation
Permission must be obtained from your local power supply utility.
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
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Installation
Preparation
WARNING Electrocution
The appliance contains inverters (e.g. variable speed
compressors, high efficiency circulation pumps or high
efficiency fans). In the event of a fault, inverters can
cause DC residual currents. If RCDs are provided, they
have to be type B AC/DC-sensitive.
A DC residual current can block type A RCDs.
ff
Ensure that the appliance power supply is disconnected from the distribution board.
4.6
!
Transport
Material losses
If the appliance is transported without packing and without using a pallet, its outer casing may be damaged.
Remove the side panels and doors in such cases.
4.6.1 Function module
Electrical data is provided in the chapter “Specification / Data
table”.
To protect the appliance against damage, transport it vertically
inside its packaging. Where space is restricted, you can also tilt
the appliance at an angle to move it.
All electrical connection and installation work must be carried out
in accordance with VDE regulations (DIN VDE 0100) [or local regulations], the rules of your local power supply utility, and relevant
national and local regulations.
To make handling easier, you may attach a transport aid on the
back of the function module. This comprises two angled brackets.
ff
Fit one angle bracket each vertically on the l.h. and r.h. side.
The cable cross-section must be designed for the maximum possible operating current of the appliance (see „Specification/Data
table“).
1
Note
Route the power cables and control cables separately.
4.5
!
Oxygen diffusion
Material losses
Do not use open vented heating systems. Use oxygen
diffusion-proof pipes in underfloor heating systems with
plastic pipework.
26_04_01_0620_
Note
Provide separate fuses for the power circuits for the appliance, the electric emergency/booster heater and the
control unit.
1 Transport aid
ff
Slide a robust pipe through the holes inside the transport
aids to create a handle.
ff
The transport aid can also be used in connection with a
crane/hoist to transport the appliance to the installation
location.
4.6.2 Cylinder module
In underfloor heating systems containing permeable plastic pipes,
or in open vented heating systems, oxygen diffusion can cause
corrosion to the steel components of the indirect coil in the DHW
cylinder, steel radiators or steel pipes.
!
Material losses
The products of corrosion (e.g. rusty sludge) can settle in the heating system components, which may result in a lower output or fault shutdowns due to reduced
cross-sections.
!
Material losses
During transport, never hold the cylinder module by its
connection pipes, as these would bend out of shape.
Note
We recommend the transport of the cylinder module on
its pallet to the installation location. The pallet offers
more places to hold than the cylinder module casing.
1
D0000075609
There are two grip recesses at the top of the back panel.
1 Recessed grips
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LWZ 5 S Plus | 9
Installation
Installation
5.
Installation
ff
Remove the sliding blocks once the appliance is in its intended location.
5.1
Siting the function module
Outdoor air mechanical ventilation connection option
!
Material losses
Never tilt the appliance excessively. Contacts between the
casing and the floor can damage the paintwork.
Note
Observe the minimum clearance at the back of the appliance. See chapter "Preparations / Installation site /
Minimum clearances".
The fascia and fascia frame that are fitted to the front of the appliance later, hang for shipping from the factory on the l.h. side
of the function module.
ff
Remove the adhesive tape with which the fascia is secured
for transport.
ff
Remove the fascia from the function module.
ff
Remove the wooden braces secured to the pallet which prevented the appliance from slipping during shipping.
3.
2.
1
D0000039736
1 Upper front panel
2 Cross-countercurrent heat exchanger
3 Outdoor air filter cassette
ff
Remove the upper front panel.
D0000045984
1 Door hinge bracket that attaches the side panel to the appliance and holds the door
ff
Detach the door hinge bracket.
D0000039625
!
ff
Remove the door of the function module from the appliance.
ff
Remove the r.h. side panel of the function module.
ff
Remove the function module carefully from the pallet.
ff
Push the sliding blocks supplied under the adjustable feet,
so the function module can be moved more easily to the required position.
10 | LWZ 5 S Plus
26_04_01_0613
1.
Material losses
The heat exchanger situated behind the EPS insulation
must not be damaged.
ff
Never cut in the bottom third of the circular groove
sketched out on the EPS insulation.
ff
Using a knife, carefully cut along the upper two thirds of the
dotted groove marked out on the EPS insulation.
ff
Press the core piece inward, carefully break it out and remove it.
ff
Smooth out the line of breakage.
ff
Clean the aperture.
ff
Push the folded spiral-seam tube through the hole
(max. 30 mm deep).
ff
Seal the gap between the folded spiral-seam tube and the
EPS insulation with sealing tape.
ff
Pull out the cross-countercurrent heat exchanger.
ff
Grasp the outdoor air filter cassette by the grip holes and
pull it out.
ff
Push the plate supplied into the appliance in place of the outdoor air filter cassette.
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Installation
Installation
1
Sound insulating foil
ff
If the „Outdoor air mechanical ventilation option“ port on the
back of the appliance is not being used, affix the sound insulating foil supplied in the standard delivery over the port.
3
D0000077106
Note
Fit a filter in the outdoor air duct to replace the internal
outdoor air filter that was removed previously. An air
filter box with coarse particle filter mat is available as
an accessory.
Fit the joining bracket at the back at the bottom
26_04_01_0550
2
1 Captive nut on the bottom of the cylinder module
2 Adjustable foot with nut for fitting with an open-ended
spanner
3 Sliding block
ff
Carefully tip the cylinder module far enough to enable the
adjustable feet to be inserted.
ff
Insert the adjustable feet into the captive nuts with which the
cylinder module was previously secured to the pallet.
ff
Remove the cylinder module carefully from the pallet.
ff
Push the sliding blocks supplied underneath the adjustable
feet.
ff
Level the cylinder module vertically by turning the height-adjustable feet. Arrange the bottom panel so that it is 4 to
5 mm higher than the bottom panel of the function module.
This is the amount by which the cylinder module drops when
it is being filled with water.
ff
Insert the joining bracket at the rear l.h. adjustable foot of
the function module between the appliance floor and the adjustable foot. Secure the joining bracket with two screws to
the back panel of the function module.
ff
Level the function module vertically by turning the height-adjustable feet.
5.2
Installing the cylinder module
ff
Undo the screws underneath the pallet with which the cylinder module is secured to the pallet.
ff
Undo the cover screws on the cylinder module.
ff
Reach through the port on the r.h. side of the cylinder module and push the cylinder module cover upwards.
ff
Remove the cylinder module cover.
1
Material losses
Never tilt the cylinder module excessively. Contacts between the casing and the floor can damage the paintwork.
D0000039733
!
D0000076048
D0000076557
Note
The adjustable feet must not be fully screwed in, otherwise you will not be able to push the joining bracket
between the bottom panel and the foot.
1 Fixing screw on the cylinder module front panel
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LWZ 5 S Plus | 11
Installation
Installation
ff
Undo the fixing screw on the cylinder module front panel.
Pushing the cylinder module towards the function module
ff
Push the cylinder module carefully towards the function
module, so that the rear r.h. adjustable foot of the cylinder
module is near the recess in the joining bracket.
1
5.3
Connecting modules
Cylinder temperature sensor and anode cable
ff
Remove the cable tie that tie together the electrical cables
of the anode terminal and the cylinder temperature sensor
lead.
ff
Pull the connecting cables/leads of the anode and the cylinder temperature sensor through the aperture located on the
top r.h. side in the cylinder module.
2 3 4
1 Front panel of the cylinder module
2 DHW flow
3 Heating flow
4 Common return
ff
Lift the front panel of the cylinder module slightly and remove it from the cylinder module.
ff
Remove the protective caps from the three pipes (DHW flow,
heating flow, common return); these are located in the lower
section on the r.h. side of the function module. Later on,
these pipes connect the function module and cylinder module hydraulically.
Note
The pipes must protrude at least 40 mm. If necessary,
remove any protruding foam insulation.
Removing the side panel of the cylinder module (optional)
The side panel of the cylinder module only needs to be removed
if you want to install the DHW circulation set available as an accessory.
D0000039618
D0000039647
1
1 Aperture in the thermal insulation for sensor lead of the cylinder temperature sensor
ff
Push the cylinder temperature sensor from the top through
the aperture in the thermal insulation.
ff
Insert the cylinder temperature sensor into the lower cylinder sensor well.
Note
It is possible that the cylinder module and the function
module will still be too far apart to be able to insert the
cylinder temperature sensor into the sensor sleeve.
If so, you can insert the cylinder temperature sensor into
the sleeve at a later point.
The top sensor sleeve is required either in connection with buffer
operation on convector heaters (see chapter „Settings / DHW /
DHW buffer mode“) or for economy mode (see chapter „Connecting internal cables“).
1
D0000047062
Pushing the cylinder and the function modules together
1 Screw for securing the side panel
ff
Undo the screws securing the side panel.
ff
Lift the side panel slightly and remove it from the cylinder
module.
12 | LWZ 5 S Plus
Note
An air hose to capture the differential pressure runs
along the l.h. side of the function module. This air hose
must run inside the curved groove cut into the thermal
insulation.
ff
Ensure that this air hose is seated correctly.
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Installation
Installation
Note
The adjustable feet must not be fully screwed in, otherwise you will not be able to push the joining bracket
between the bottom panel and the foot.
ff
Push the cylinder module further towards the function module, so that the rear r.h. adjustable foot of the cylinder module is pushed into the recess in the joining bracket.
The lower joining bracket ensures that the cylinder module is
automatically pushed into its final position.
ff
Level the cylinder module and the function module vertically
to the same height by turning the adjustable feet.
!
Material losses
Before filling, tighten the screws only lightly so that the
paint finish is not damaged when the cylinder module
moves down during filling. Tighten the screws after filling.
Connecting the function module and the cylinder module
hydraulically
1
Note
The cylinder module drops 4 to 5 mm when its cylinder
is filled.
Turning anti-clockwise exposes more of the adjustable feet, meaning the appliance moves upwards. The cylinder module must be
snug against the function module.
Connection top back
1
2
1 Joining plate
2 Horizontal locking bracket
ff
Connect the function module and the cylinder module at
the top back by positioning joining plate and inserting two
screws each through the joining plate into the function module and the cylinder module.
Fitting the horizontal locking bracket to the front
ff
Connect the function module and cylinder module at the
front by securing one horizontal locking bracket each at the
top and bottom using screws.
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3
D0000039616
D0000039619
2
1 Door lock
2 Fixing screws of the lower front panel
3 High limit safety cut-out retaining bracket
A door lock is located above the door of the function module.
ff
Push the door lock at the front upwards.
ff
Pull the door lock backwards and then upwards to unhook
the door lock.
ff
Open the function module door.
ff
Undo the fixing screws from the lower front panel.
ff
Remove the lower front panel.
To make yourself room for the assembly, you can temporarily
unhook the high limit safety cut-out retaining bracket.
LWZ 5 S Plus | 13
Installation
Installation
ff
Undo the screws on the high limit safety cut-out retaining
bracket.
ff
Unhook the high limit safety cut-out retaining bracket from
the slots, pull it out of the appliance and hook it into the
same slots, but this time from the outside.
1 2
4
1
2
3
4
Retainer
Screw cap
Gap between screw cap and connector body
Connector body
D0000038977
3
3
26_03_01_0693
1
2
5.3.1 How the push-fit connectors work
!
Material losses
Never install the push-fit connectors in the DHW line.
Only install the push-fit connectors in the heating circuit.
!
Material losses
Tighten the screw cap of the push-fit connector by hand.
Never use a tool.
Material losses
To ensure the push-fit connector is held securely, pipes
with a surface hardness > 225 HV (e.g. stainless steel)
must have a groove.
ff
Using a pipe cutter, cut a groove (depth approx. 0.1 mm) at a defined distance from the end of
the pipe.
-- Pipe diameter‌ 22 ‌mm‌:‌ 17‌±‌0.5‌ mm
-- Pipe diameter‌ 28 ‌mm‌:‌ 27.5‌±‌0.5‌ mm
!
Ø Pipe diameter
A Insertion depth
!
mm
mm
22
38
Material losses
Pipe ends must be deburred.
ff
Always use a pipe cutter to trim pipes.
ff
Push the pipe past the O-ring into the push-fit connector
until it reaches the prescribed insertion depth.
ff
Tighten the screw cap fully to the joiner body until finger-tight. This secures the push-fit connection.
Undoing the push-fit connection
If the push-fit connectors later need to be undone, proceed as
follows:
ff
Turn the screw cap anti-clockwise until there is a narrow gap
of approx. 2 mm. Press the retainer back with your fingers
and hold on to it.
ff
Pull out the inserted pipe.
26_03_01_0693
The hydraulic connection between the function and cylinder
module is provided by three pipes: DHW flow, heating flow and
common return.
ff
Make sure that the caps have been removed from the pipes.
26_03_01_0693
1 DHW flow
2 Heating flow
3 Common return
Material losses
Support sleeves are required when using plastic pipes.
The push-fit connectors are equipped with a retainer with stainless steel serrations and an O-ring for sealing. The push-fit connectors also have a „twist and secure“ function.
Simply turning the screw cap by hand will secure the pipe in the
connector and push the O-ring against the pipe to seal it.
Making the push-fit connection
The connector must be in its relaxed position before the pipe is
inserted. In this position, there is a small gap between the screw
cap and connector body.
14 | LWZ 5 S Plus
5.3.2 Connecting modules with push-fit connectors
An elbow push-fit connector is prefitted on the heating flow in
the function module.
ff
Fit the elbow push-fit connector onto the heating flow port
on the r.h. side of the cylinder module.
ff
Push a straight push-fit connector on each of the two pipes
on the r.h. side of the cylinder module.
ff
Connect both of the free pipes inside the function module to
the push-fit connectors that you previously attached to the
cylinder module pipes.
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Installation
Installation
ff
Refit the high limit safety cut-out retaining bracket from the
inside using the slots and secure the bracket.
ff
Connect the flanged pipe with a push-fit connector to the
heating circuit return.
5.4
„Heating flow“ connection
ff
Using a push-fit connector, connect one of the flanged pipes
supplied to the connection for the heating flow.
ff
Connect a ball valve to the flanged pipe end.
ff
Connect a flanged pipe to the other side of the ball valve.
ff
Connect the flanged pipe with a push-fit connector to the
heating circuit flow.
Heating water connection
The heating system must be connected by a qualified contractor in
accordance with the water installation drawings, which are part of
the technical guides. You can use the push-fit connectors supplied
or ball valves to make the connection of the flow and return.
Note
The appliance has no built-in expansion vessel.
ff
Install an expansion vessel in the heating circuit
return.
If you install the expansion vessel in the heating circuit
flow, the expansion volume of the heating water may
be shut off during DHW heating in installations without
hydraulic separation (no buffer or low loss header). This
may cause the safety valve to respond.
Note
Deburr the pipe ends.
A filter ball valve is provided for the return. Two union nuts and
two short flanged copper pipe ends are provided for fitting a ball
valve.
ff
As a suitable point, install an air vent valve at the highest
point of the heating system.
ff
Thoroughly flush the pipework before connecting the appliance. Foreign bodies such as welding pearls, rust, sand,
sealant, etc. can impair the operational reliability of the appliance, and can lead to the condenser becoming blocked.
ff
Remove the protective caps from the heating flow and heating return connections.
„Heating return“ connection
3
6
3
3
2
2
1
5
Carry out a fill water analysis before filling the system. This may,
for example, be requested from the relevant water supply utility.
To avoid damage as a result of scaling, it may be necessary to
soften or desalinate the fill water. The fill water limits specified
in chapter „Specification / Data table“ must always be observed.
ff
Recheck these limits 8-12 weeks after commissioning and as
part of the annual system maintenance.
Note
With a conductivity > 1000 μS/cm, desalination treatment
is recommended in order to avoid corrosion.
Note
If you treat the fill water with inhibitors or additives, the
same limits apply as for desalination.
Minimum flow rate
1 „Heating return“ connection
2 Plug-in connector
3 Flanged pipe
4 Filter ball valve
5 „Heating flow“ connection
6 Ball valve
ff
Using a push-fit connector, connect one of the flanged pipes
supplied to the heating return connection.
ff
Connect the filter ball valve to the flanged pipe end.
ff
Reconnect a flared pipe to the end of the ball valve.
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Water quality
Note
Suitable appliances for water softening, as well as for
filling and flushing heating systems, can be obtained via
trade suppliers.
26_04_01_0629
3
4
Thermal insulation
ff
Provide thermal insulation in accordance with current
regulations.
The appliance is designed in such a way that no buffer cylinder
is required to provide hydraulic separation of the flow in the heat
pump circuit and the heating circuit in conjunction with area heating systems. If several heating circuits are used, we recommend
using a low loss header.
Note
The minimum flow rate must be maintained at every
operating point of the heat pump to ensure perfect heat
pump operation (see "Commissioning / Commissioning").
To do this, the following options are available:
ff
Install a remote control in a lead room and open this
heating circuit fully.
ff
Install a low loss header or buffer cylinder.
The lead room is the room where the remote control is installed,
preferably the living room or bathroom. The lead room can be
regulated with an external programming unit, or indirectly by adjusting the heating curve. See chapter „Operation / MAIN MENU /
Settings / Heating“ in the operating instructions.
LWZ 5 S Plus | 15
Installation
Installation
If an underfloor heating thermostat is installed, it should be set
with a sufficient differential (at least 20 K) from the maximum
set heating circuit temperature. The electrical connection of the
underfloor heating thermostat is shown in chapter „Specification /
Connection examples“.
!
5.5
!
Material losses
In the "INFO" menu, the appliance offers the option to
display the water pressure.
ff
Ensure that the pump does not run without water.
5.6
Filling the DHW cylinder
The DHW cylinder can be filled via the cold water inlet connection.
ff
Open one or more hot water draw-off points to fill the DHW
cylinder.
ff
Close the hot water draw-off points once the cylinder is full.
5.7
Condensate drain and overpressure valve
ff
Check the position of the internal condensate pump in the
function module. The condensate pump must fully rest on the
floor.
Water connection
1
Material losses
Never install the push-fit connectors in the DHW line.
Only install the push-fit connectors in the heating circuit.
2
We approve stainless steel, copper or plastic pipework for the
DHW line.
ff
Remove the protective caps from the cold water inlet and
DHW outlet connections.
Safety valve
The appliance is a sealed unvented DHW cylinder. Provide the
appliance with a pressure relief valve.
ff
Install a type-tested safety valve in the cold water supply
line. The response pressure of the safety valve must be below
or equal to the permissible operating pressure of the DHW
cylinder.
The safety valve protects the appliance against unacceptable excess pressure. The diameter of the cold water supply line must be
no greater than the diameter of the safety valve.
ff
Ensure that the expansion water escaping from the safety
valve can drip into a drain, e.g. a tank or funnel.
Ensure the drain cannot be shut off.
ff
Size the drain so that water can drain off unimpeded when
the safety valve is fully opened.
ff
Ensure that the discharge pipe of the safety valve is open to
the atmosphere.
ff
Fit the discharge pipe of the safety valve with a constant
downward slope and in a room free from the risk of frost.
Pressure reducing valve
Bear in mind that, depending on the static pressure, you may also
need a pressure reducing valve.
DHW circulation
DHW circulation is not recommended for reasons of poor energy efficiency. If DHW circulation is required due to unfavourable
pipework or for reasons of convenience, you must install the DHW
circulation in accordance with applicable standards. To reduce
pump runtime and energy demand, we recommend imposing time
and temperature controls on activation of the circulation pump.
A DHW circulation pipe kit and circulation pump can be found in
our range of accessories.
16 | LWZ 5 S Plus
D0000077842
Stainless steel, zinc-plated steel, copper or plastic pipework are
approved materials for the cold water line.
1 Safety valve drain
2 Condensate drain
ff
Connect a condensate drain pipe to the condensate drain.
!
Material losses
To ensure the condensate drains off correctly, never kink
the condensate line. If necessary, create a loop.
ff
Route the condensate line with a sufficient fall.
Route the condensate into a floor drain. When doing so, ensure the
drain is adequately ventilated, e.g. free discharge into a siphon.
Use a condensate pump if there is insufficient fall.
ff
If using a condensate pump, ensure that it delivers at least
6 l/min.
Pressure relief valve drain
On the r.h. side of the appliance, the safety valve drain connection
also routes the pressure relief valve discharge hose out of the
casing. Ensure that draining water can run off freely.
5.8
Electrical connection
WARNING Electrocution
Only qualified electricians may carry out the connection in accordance with these instructions. Carry out all
electrical connection and installation work in accordance
with national and regional regulations.
WARNING Electrocution
Disconnect the appliance from the power supply before
carrying out work on the control panel.
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Installation
Installation
WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. The appliance must be able
to be separated from the power supply by an isolator
that disconnects all poles with at least 3 mm contact
separation. This requirement can be met by using contactors, circuit breakers, fuses/MCBs, etc.
5.8.2 Control panel
WARNING Electrocution
Only components that operate with safety extra low
voltage (SELV) and that ensure secure separation from
the mains voltage supply may be connected to the low
voltage terminals of the appliance.
Connecting other components can make parts of the appliance and connected components live.
ff
Only use components which have been approved by
us.
Material losses
The specified voltage must match the mains voltage. Observe the type plate.
!
Material losses
The cable entries at the back of the appliance are closed
with cable grommets. To prevent an ingress of water, cut
as small a hole as possible in the cable grommet.
D0000062335
!
1
1 Control panel fastening screws
ff
Undo the fixing screws of the control panel cover.
Note
A serrated washer is used on one of the fastening screws
to earth the control panel cover.
When you refit the control panel cover after working at
the control panel, place the serrated washer behind the
fastening screw.
Note
The leakage current of this appliance can be > 3.5 mA.
5.8.1 General information
The electrical data is given in the chapter „Specification/Data
table“.
Cable routing
ff
Push all connecting cables and sensor leads through one of
the „Entry electrical cables“ ducts in the back panel of the
function module.
The control panel cover is held in place at the lower end by a tab
that slots behind the appliance side panel.
ff
Push the control panel cover upwards and pull out at the
bottom to remove it from the appliance.
5.8.3 Heat pump (compressor) and electric emergency/
booster heater
Safety temperature controller for underfloor heating system
Material losses
In order to prevent excessively high flow temperatures in
the underfloor heating system in the event of a fault, we
always recommend using a safety temperature controller
to limit the system temperature.
Safety equipment for simultaneous operation of ventilation
unit and combustion equipment
ff
XD03-13/14‌: Connect the safety equipment using a floating
contact.
D0000038968
!
XD01
WP
Heat pump
MFG
Electric emergency/booster heater
of the multifunction assembly
L1‌ Compressor
L2‌Heat pump fan
XD02
For optimum function, connect all three stages of the electric
emergency/booster heater.
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LWZ 5 S Plus | 17
Installation
Installation
5.8.4 Control voltage
5.8.7 Connecting internal cables/leads
The cylinder temperature sensor and the power cable for the signal anode are routed out of the function module at the top l.h.
side. All cables/leads are identified accordingly.
D0000038970
1
XD03
Contact for Power-OFF command by the power supply
utility (option)
Steuerung Control
Mi AUF
Mixer open
Mi ZU
Mixer close
HK2
Heating circuit 2 pump‌
Kühl
No function
O/K
Stove/fireplace (optional)
UMV
No function
SL
Quick-acting air vent valve (optional)‌: ‌T he SL terminal is a
230 V input for activating ventilation by means of a pushbutton.
FA
Window open (optional)‌:‌The FA terminal is a 230 V output
for switching an automatically controlled window with
passive cooling, for example.
2
D0000059866
EVU
1 Anode connection at the cylinder
2 Earth block
ff
Connect the signal anode at the top of the cylinder. Route
the anode cable through the groove cut into the thermal
insulation.
ff
Connect the earth cable to the earth block.
5.8.5 POWER-OFF
1
XD03-EVU‌:‌Connect the signal from the power supply utility time
switch (see chapter „Commissioning / Power-OFF“).
5.8.6 External pumps‌ (‌PWM‌)
D0000038971
2
XD04
D0000039615
Note
The power supply to the external pumps is not provided
via the appliance.
1 Sensor well for the cylinder temperature sensor (economy
mode/buffer mode)
2 Sensor well for the cylinder temperature sensor (Comfort)
External terminals‌ (‌Safety extra low voltage‌)
UP HK2 Control connection for the pump of heating circuit 2 (control with 0-10 V or PWM signal)
UP SOL No function
18 | LWZ 5 S Plus
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Installation
Installation
Outside temperature sensor AFS 2
1
The outside temperature sensor should have full and unprotected
exposure to the weather. Never fit it above windows, doors, light
wells or air ducts, and never subject it to direct insolation. Install
the outside temperature sensor on a north or north-east facing
wall on the exterior side of a heated room.
2
3
D0000039618
Never install the outside temperature sensor near an exhaust air
discharge or any other influencing factors (e.g. drier discharge).
5.8.9 CAN BUS‌
The sensors integrated in the appliance, the sensors supplied and
the outside sensor are PTC and Pt1000 sensors.
D0000038971
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Connecting the external programming unit
Note
Check whether the room in which the external programming unit is installed receives a lot of warmth, for example sunlight. If it is warmed from outside, the device
might regulate the flow temperature downwards. As a
result, the temperature in other rooms may be lower
than desired.
5.8.8 Connecting sensors
External terminals‌ (‌Safety extra low voltage‌)
TA
Outside temperature sensor
TV
Mixer circuit flow temperature sensor
TR
Room temperature sensor
TS
No function
TX
No function
TD
No function
Room temperature sensor
If planned as part of the system configuration, install the sensor
according to the sensor installation instructions.
ff
Route the sensor lead through the cable entry in the back
panel of the function module.
ff
XD04-TR‌:‌Connect the room temperature sensor.
1 Aperture in the thermal insulation for the sensor lead
2 Clamp (prevents the cylinder temperature sensor from slipping out)
3 Cylinder temperature sensor inside the sensor well
ff
Insert the cylinder temperature sensor into the cylinder
sensor well. Ensure that the cylinder temperature sensor is
seated correctly.
XD04
The minimum height above the ground is 2.5 m, and minimum
side clearance to windows and doors is 1 m.
ff
Remove the cover of the sensor enclosure.
ff
Secure the sensor enclosure to the wall using the screw
provided.
ff
Route the sensor lead through the cable entry in the back
panel of the function module.
ff
XD04-TA‌:‌Connect the sensor lead.
ff
Connect the sensor lead to the outside sensor.
ff
Place the cover on the sensor enclosure so that it clicks audibly into place.
With an external programming unit, you can switch all appliance
functions and make all settings from the living space. In addition,
the external programming unit captures the room temperature.
If required, this value influences the heating curve. With this, you
can reduce the heating curve if the set room temperature in the
lead room, i.e. the room where the programming unit is installed,
is exceeded (for example through insolation or a wood stove).
Room influence weighting can be set using the „ROOM INFLUENCE“ parameter.
„„
SETTINGS
… HEATING
 HEATING CURVE HC1
 ROOM INFLUENCE HC1
LWZ 5 S Plus | 19
Installation
Installation
5.9
Material losses
High flow rates or water hammer can damage the appliance.
ff
Fill the appliance at a low flow rate.
D0000038971
!
Filling and venting the heating system
CAN2‌ (‌CAN BUS‌, ‌Safety
CAN-L
GND
CAN-H
+12V
extra low voltage‌)
Low
Ground
High
ff
Route a standard data cable with at least four cores from the
appliance to the mounting position of the remote control.
Example:
-- J-Y(ST)Y 2x2x0.8 mm
-- LiYCY 2x2x0.5 mm²
From approx. 50 m cable length greater cable cross-sections
should be used.
Note
Observe correct separation when installing the BUS cable,
the mains power cable and the sensor leads.
D0000039056
XD04
1
1 Drain connection for filling and draining the heating circuit
ff
Undo the cap from the drain connection.
ff
Connect the fill hose with a quick-action hose coupling.
ff
Open the drain connection by turning the star grip.
1
Internet Service Gateway
D0000038979
The Internet Service Gateway (ISG) enables you to operate the
appliance within your local home network and via the internet
when on the go.
XD04
CAN2‌ (‌CAN BUS‌, ‌Safety extra low voltage‌)
CAN-L
Low
GND
Ground
CAN-H High
The power supply to the ISG is not provided via the appliance.
ff
Also observe the ISG operating instructions.
The CAN BUS cable conductors are allocated as follows:
White
Brown
Black
High
Low
Earth (Ground)
20 | LWZ 5 S Plus
1
D0000038979
D0000038971
1 Air vent valve on the multifunction assembly
ff
Open the air vent valve of the multifunction assembly by
turning anti-clockwise.
1 Air vent valve on the circulation pump
ff
Open the air vent valve on the circulation pump by pulling its
head upwards.
ff
After venting, check whether the air vent valve of the multifunction assembly or circulation pump drips.
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Installation
Installation
5.10 Fitting the appliance casing
1
5.10.1 Installing front panel and cover of the cylinder module
ff
Hook the front panel of the cylinder module into the hooks
on the cylinder module frame.
D0000039621
D0000039733
1
1 Air vent valve of the DHW heating line
ff
Open the air vent valve of the DHW heating line.
ff
For filling, turn the lever on the drain connection 90°
anti-clockwise.
ff
Switch on the appliance and set the displayed system
pressure at the programming unit („PRESSURE HTG CIRC“
parameter).
ff
Fill the system.
ff
After filling close the drain connection.
ff
Fit the cap on the drain connection.
You can check the water pressure in the heating circuit on the
programming unit with the „PRESSURE HTG CIRC“ value.
ff
Determine the „PRESSURE HTG CIRC“ value for one of the
three favourites. For this, navigate from the default display to
the „FAVOURITES“ parameter.
1 Fixing screw on the cylinder module front panel
ff
Fix the front panel of the cylinder module to the appliance
using a screw.
ff
Place the cover onto the cylinder module so that the labels with the terminal designations are located behind the
terminals.
ff
Secure the cylinder module cover with screws.
5.10.2 Installing front panel of the function module
ff
Attach the lower front panel of the function module using
screws.
ff
Close the function module door and lock it.
5.10.3 Mounting the programming unit
Note
Air locks in the system are detrimental to the appliance
operation.
ff
Vent the pipework carefully.
www.stiebel-eltron.com
D0000039624
Note
Proceed carefully when filling as the "PRESSURE HTG
CIRC" value is only updated every 10 seconds. If you have
determined the value not in association with one of your
favourites but instead by calling up the "INFO" parameter,
the value will only be updated every 60 sections.
ff
Position the programming unit from the front in the opening
of the fascia.
ff
Then fit the frame at the back of the fascia together with the
programming unit, until the programming unit clicks into
place in the frame.
LWZ 5 S Plus | 21
Installation
Installation
5.10.4 Fitting the fascia
ff
Hook the fascia into the hooks provided at the lower front of
the appliance.
4.
Never incorporate more than four 90° bends. The radius of the
bends must be at least 365 mm, relative to the centre of the hose.
Note
When installing an outdoor air connection maintain
Δp < 20 Pa. In other words, the outdoor air duct run
should be as short as possible.
The air hose tends to sag because of its flexibility. Secure it at
intervals of approx. 1 m.
5.11.2 Fitting the air hoses
ff
Adapt the shape of the air hose to match the oval connection
panel of the function module.
2.
1
3.
2
ff
Connect the bus cable to the programming unit. The BUS
cable must run upwards with the jumper in the l.h. side.
ff
Insert the fascia from the top into the fascia frame.
D0000059948
D0000039644
1.
1 External hose
2 Internal hose
ff
Push the external hose and the thermal insulation slightly up
so that the internal hose of the air hose protrudes slightly.
D0000059950
The fascia has one screw each on the l.h. and r.h. side.
ff
Tighten these screws to secure the fascia to the fascia frame.
5.11 Outdoor air and exhaust air hose installation
Note
If connecting a geothermal heat exchanger, convert the
appliance as described in chapter "Outdoor air mechanical ventilation connection option" before fitting the air
hoses.
ff
Invert the internal hose halfway down the connector.
5.11.1 Information on routing the air hoses
ff
Use a sharp knife to trim the hose to the required length. Cut
the Bowden core using wire cutters.
If you need to extend the air hose, push the core of two hoses
together. There should be approx. 30 cm overlap.
D0000059964
Air hoses guide the intake air (outdoor air) from the outside to
the heat pump, and route the discharge air (exhaust air) to the
outdoors (see chapter „Required accessories“). These are highly
flexible, thermally insulated and self-extinguishing in case of fire
in accordance with ASTMD 1692-67 T.
ff
Seal the transition from the internal hose to the connector
with the self-adhesive thermal insulation tape supplied.
The total length of hoses on the air intake and discharge sides
must not exceed 8 m.
22 | LWZ 5 S Plus
www.stiebel-eltron.com
Installation
Installation
1 Film
ff
Pull the sleeves of the sound-optimised hoses (LSWP 315-4 S)
over the connections.
26_04_01_0686
D0000059965
1
ff
Secure the external hose with the hose clip to the connector.
!
Material losses
Always cover the air intake and discharge with wire
grilles, and secure the hoses against slippage.
Hose connection panels or wall outlets with hose connection and
grilles are available for hose connections to exterior wall knockouts or cellar windows.
D0000059966
5.12 Installing extract air and supply air pipes
ff
For the sound optimised hoses (LSWP 315-4 S), use the self
adhesive thermal insulation provided to seal the transition
from the hose sleeve to the connection.
Install with the material you can obtain from us or with commercially available folded spiral-seam tubes.
!
Material losses
During installation, ensure that no metal swarf enters
the pipework. However, should this occur, remove this
debris, otherwise the fans may be damaged.
D0000059967
Where the extract air and supply air pipes are routed through unheated rooms, they must be thermally insulated. If, when connecting a geothermal heat exchanger, the outdoor air pipe is routed
through heated rooms, this pipe must also be thermally insulated
with vapour diffusion-proof material.
ff
Pull the external hose and the thermal insulation below it
over the connector.
ff
Tuck the thermal insulation into the outer hose in such a way
that the thermal insulation is no longer visible.
5.12.1 Silencer
Fit silencers as near as possible to the appliance into the extract air
and the supply air flows. Fit a silencer just upstream of bedrooms.
If a room with a high noise level needs to be ventilated, install
additional silencers in the supply air pipe or extract air pipe of this
room to reduce sound transmission to adjacent rooms.
5.12.2 Cleaning apertures
ff
Provide cleaning apertures when installing the air ducts, so
the air ducts can be checked at regular intervals and cleaned
if necessary.
D0000059968
5.12.3 Supply and extract air vents
ff
Seal the transition from the external hose to the connector
with the self-adhesive thermal insulation tape supplied.
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Supply and extract air vents for the living space are available for
wall or ceiling mounting.
When venting the kitchen, ensure that the extract air vent is fitted
as far as possible from the cooker.
!
Material losses
Never link cooker hoods to the ventilation system.
LWZ 5 S Plus | 23
Installation
Commissioning
5.12.4 Overflow apertures
Provide suitable overflow apertures since the air is only blown
into living rooms and bedrooms, and is only extracted from unpleasant-smelling and humid rooms. For example, fit ventilation
grilles in internal doors or walls, or increase the air gap below
the door (≥ 8 mm) to ensure an unimpeded overflow and thereby
air balancing.
1
Commissioning
!
D0000051625
6.
6.1.4 Cylinder
-- Has the cylinder been filled (hot tap open until water flows
out)?
-- Has a pressure reducing valve been installed if the water
pressure is above 80 % of the permissible pressure?
WARNING Injury
Only qualified contractors may commission this appliance and instruct the user.
1 Plastic union nut
!
Material losses
Never operate the ventilation system if there are high levels of dust inside the building or outside in the immediate
vicinity, as this could block the filter. Dust is created by
cutting tiles or working with plasterboard, for example.
ff
Commission the system in accordance with this manual. Our
customer service can provide commissioning support, which
is chargeable.
Note
If adjustments to the appliance control unit have to be
made during commissioning, observe chapter "Operation" of the operating instructions and chapter "Settings"
of these installation instructions.
6.1
Checks before commissioning
6.1.1 Heating system
-- Are all connections on the central heating and DHW side connected and tightened?
-- Was the heating system filled to the correct pressure and
vented, and was the quick-acting air vent valve opened?
-- Has the condensate hose been routed correctly?
-- Was a vessel placed beneath the safety valve discharge hose?
!
Material losses
The torque of the plastic union nut depends on the gasket
used.
15 Nm = prefitted soft rubber gasket.
25 Nm = alternative hard gasket.
Keep to the permissible torque.
-- Is the plastic union nut tight against leaks? If it is leaking,
tighten the plastic union nut.
6.1.5 Temperature sensor
-- Have outside sensors, cylinder temperature sensor and, if
required, mixer circuit sensor and flow sensor for the second
heating circuit been correctly positioned and connected?
6.1.6 Power supply
-- Has the power supply been designed correctly and the earth
conductor for the cylinder connected?
-- Have all internal cables been connected correctly?
6.1.7 High limit safety cut-out
With ambient temperatures of below -10 °C, it is possible that
the high limit safety cut-out of the electric emergency/booster
heater may trip.
ff
Check whether the high limit safety cut-out has tripped.
6.1.3 Heat pump
-- Have the insulated air hoses been installed in accordance
with regulations? In particular, the outdoor air and exhaust
air connections must be sealed carefully on both sides.
-- Are the exterior wall outlets free from leaves and other
contamination?
Note
Never fit any additional fly screens in the wall outlets.
24 | LWZ 5 S Plus
1
1 Reset button for high limit safety cut-out
ff
Reset the high limit safety cut-out by pressing the reset
button.
26_04_01_0621
6.1.2 Ventilation system
-- Have the air ducts been installed correctly and sealed if
required?
-- Have all air connections been designed correctly?
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Installation
Appliance shutdown
7.
6.1.8 Condensate pump
ff
Check the condensate pump before commissioning the
appliance.
ff
Check whether the drain hose of the defrost tray is routed
correctly.
!
Filter insertion
Material losses
Never operate the appliance without filters.
ff
Insert the supply air filter, included in the standard
delivery, into the appliance.
1.
Note
Prevent the appliance being shut down if it is to be restarted later. Use the standby mode.
2.
WARNING Burns
Hot water may escape when draining the DHW cylinder.
ff
Close the shut-off valve in the cold water supply line.
ff
Open the hot water taps on all draw-off points.
Commissioning via the programming unit
338916‌
6.4
WARNING Injury
There will be no ventilation if the appliance is taken out
of use. This may result to the development of mould fungus and damage to the building.
ff
Prevent the appliance being out of use for prolonged periods.
When shutting down, always carry out the following steps:
ff
Isolate the appliance fully from the power supply.
ON
6.3
!
D0000076369
6.2
Appliance shutdown
Commissioning‌ /‌ Notification list
Recommissioning
ff
Carry out the work specified in chapter „Maintenance“.
ff
If there has been frost since the appliance was shut down,
check all hydraulic lines for possible frost damage.
ff
Fill the DHW cylinder.
ff
Fill the heating circuit.
ff
Switch on the power supply.
D0000039620
1
1 Drain connection of the DHW cylinder
ff
Fully drain the DHW cylinder.
ff
Drain the heating circuit.
In the case where the appliance is to be returned into use again
later, first carry out the following:
ff
Remove the air filters.
ff
Carry out all service-related cleaning tasks, such as cleaning the condensate pan and the cross-countercurrent heat
exchanger.
!
www.stiebel-eltron.com
Material losses
ff
Mark the appliance to enable the recognition that
the appliance has been fully shut down and that it
must be refilled, checked and commissioned before
restarting.
ff
Mark the appliance with the date when it was shut
down.
LWZ 5 S Plus | 25
Installation
Troubleshooting
8.
Troubleshooting
8.1
Exhaust air fan is catching
8.2
!
If the exhaust air fan drags, return it into its correct position.
Cleaning defrost pan
Material losses
Do not use any cleaning agents, just water.
D0000039736
Clean the defrost tray if it is dirty. It may be contaminated with
leaves, mineral wool residues (from insulation) or polystyrene
balls (from drainage tiles).
ff
Remove the central front panel as described in chapter
„Cleaning the evaporator fins“.
1
1 Door hinge bracket that attaches the side panel to the appliance and holds the door
ff
Detach the door hinge bracket.
1
8.3
Circulation pump
If the LED on the heating circuit pump flashes red even though
there is an active heat demand, disconnect the power supply for
30 seconds. If the circulation pump does not run after switching
the power supply back on, replace the circulation pump.
8.4
Fault messages in the programming unit
Note
The message list can be found in a separate supplement.
If there is a fault in the system, a fault message appears on the
display. There is a fault memory so you can check earlier faults.
This is found under „MENU / CONTRACTOR / FAULT SEARCH“. The
programming unit shows the ten most recent faults.
Some fault messages prompt you to press the reset button.
1 Electronics reset button
1
1 Reset button for high limit safety cut-out
26 | LWZ 5 S Plus
D0000039646
1 Fan strut fixing screws
ff
Remove the door of the function module from the appliance.
ff
Remove the r.h. side panel of the function module.
ff
Undo the fixing screws from the fan strut and push the strut
so the exhaust air fan no longer drags. If necessary, increase
the clearance between the fan nozzle and the fan using
spacers.
ff
Refit the fixing screws to the fan strut.
ff
Hook the side panel of the function module back onto the
appliance.
ff
Hook the door on and screw the door hinge bracket back
onto the cover and side panel.
D0000039737
D0000039625
1
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Installation
Maintenance and cleaning
9.
Maintenance and cleaning
9.2
The outdoor air filter is fitted downstream of the cross-countercurrent heat exchanger.
WARNING Electrocution
ff
Prior to commencing any service or cleaning work,
isolate the appliance across all poles from the
power supply.
9.1
Cleaning the outdoor air filter
Cleaning the air/air heat exchanger
3.
Check and clean the cross-countercurrent heat exchanger at least
once a year.
2.
2.
26_04_01_0642
1.
1 Upper front panel
2 Cross-countercurrent heat exchanger
3 Outdoor air filter cassette
ff
Pull out the cross-countercurrent heat exchanger.
ff
Grasp the outdoor air filter cassette by the grip holes and
remove it.
ff
Remove the filter from the outdoor air filter cassette, clean it,
and insert a new filter if required.
ff
Refit the outdoor air filter cassette in the appliance.
ff
Refit the cross-countercurrent heat exchanger in the
appliance.
ff
Refit the upper front panel and the fascia.
9.3
Cleaning the evaporator fins
Check the evaporator fins for dirt from time to time.
1
26_04_01_0574
1 Upper front panel
2 Cross-countercurrent heat exchanger
ff
Open the door of the function module (r.h. half of the
appliance).
ff
Remove the fascia fitted to the centre of the appliance.
ff
Remove the upper front panel.
ff
If the contamination level is modest, clean the cross-countercurrent heat exchanger with the brush attachment of a
vacuum cleaner.
ff
If more severe contamination is visible and extends into the
cross-countercurrent heat exchanger, clean it as described in
the following.
ff
Pull out the cross-countercurrent heat exchanger.
ff
Clean the cross-countercurrent heat exchanger with warm
water. Do not use solvents.
ff
Afterwards flush the cross-countercurrent heat exchanger
with warm water.
ff
Let the cross-countercurrent heat exchanger dry out.
26_04_01_0613
1.
1 Defrost hose (hose of the pressure differential switch for capturing the end of defrosting)
ff
Undo the screws and remove the central front panel.
ff
Remove the defrost hoses from the guide grooves in the EPS
cover.
ff
Pull the now accessible EPS cover 6 to 8 cm to the right.
ff
Tilt the top of the EPS cover towards you from the appliance.
ff
Pull the EPS cover upwards to remove.
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LWZ 5 S Plus | 27
Installation
Maintenance and cleaning
ff
Spray water across the evaporator fins.
ff
Remove the water from the appliance using a wet suction
device.
ff
Remove contaminants and blockages.
26_04_01_0575
Note
Check the condensate drain regularly, at least once a year.
ff
Remove the dirt grille fitted above the condensate pan by
compressing it from its sides and removing it upwards.
ff
Check the defrost pan drain and clean it, if required.
9.4
Cleaning the condensate drain
Check the condensate drain regularly.
ff
Remove the evaporator cover (see chapter „Cleaning the
evaporator fins“).
ff
Remove dirt and blockages immediately.
ff
To test the drain, pour one litre of water, for example from
two half-litre bottles, into the condensate pan.
If the condensate pan does not overflow, the drainage facility is
adequate.
Below the evaporator is a two-part evaporator gasket. The two
parts of the gasket are connected with a bracket.
ff
Pull the bracket upwards to remove.
ff
First remove the l.h. half of the evaporator cover.
ff
Close the filter ball valve by turning it 90° clockwise.
ff
Undo the cap.
ff
If the filter element is contaminated, connect a short hose for
backwashing.
ff
Place the free end of the hose in a bucket.
ff
Turn the filter ball valve 15° clockwise.
ff
Turn the filter ball valve 15° back again.
ff
Check whether cleaning was successful. Repeat backwashing
if required.
ff
Refit the cap.
ff
Open the filter ball valve by turning it 90° anti-clockwise.
ff
Check the system fill pressure and adjust if required.
26_04_01_0591
26_04_01_0614_
Cleaning the filter ball valve
26_04_01_0577
9.5
ff
Then remove the r.h. half of the evaporator cover.
!
Material losses
Do not use any cleaning agents, just water.
!
Material losses
Do not use a high pressure cleaner otherwise the evaporator fins may be bent.
28 | LWZ 5 S Plus
www.stiebel-eltron.com
Installation
Maintenance and cleaning
9.6
Replacing the anode
ff
Isolate the appliance from the power supply.
ff
Close the shut-off valve in the cold water supply.
ff
Remove the cover from the cylinder module.
ff
Remove the l.h. front panel of the cylinder module.
ff
Briefly open the lowest DHW draw-off point.
D0000039620
1
1 Drain connection of the DHW cylinder
ff
At the DHW cylinder drain valve, draw off approx. 20 litres of
water.
1
26_04_01_0561
2
1 Anode connection at the cylinder
2 Anode
ff
Pull the anode cable plug from the anode.
ff
Remove the anode by turning it.
ff
Insert a new anode. Alternatively, you can also use a segmented anode.
ff
Push the plug of the anode cable back onto the anode.
ff
Open the shut-off valve in the cold water line.
ff
Vent the DHW pipework at the respective DHW draw-off
points.
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LWZ 5 S Plus | 29
Installation
Specification
10. Specification
10.1 Dimensions and connections
735
1500
850
1430
680
334
b01
1180
1873
1790
1850
g07
g09
239
35-45
505
380
e01
e02
c06
255
130
g03
c01
510
130
g04
187
248
75
283
c09
145
30
289
d45
c12
D0000039680
343
g05
675
g06
LWZ 5 S Plus
b01
c01
c06
c09
c12
d45
e01
e02
g03
g04
g05
g06
g07
g09
Entry electrical cables
Cold water inlet
DHW outlet
Entry DHW circulation
Safety valve drain
Condensate drain
Heating flow
Heating return
Outdoor air
Exhaust air
Extract air
Supply air
Outdoor air geothermal heat exchanger
Outdoor air mechanical ventilation opt.
30 | LWZ 5 S Plus
Diameter
Diameter
mm
mm
22
22
Diameter
Diameter
Diameter
Diameter
Nominal diameter
Nominal diameter
Nominal diameter
Nominal diameter
Nominal diameter
Nominal diameter
mm
mm
mm
mm
19
22
22
22
DN 315
DN 315
DN 160
DN 160
DN 160
DN 160
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Installation
Specification
10.2 Wiring diagram
AA02
AA04
AA06
BF01
BL01
BM03
BP01
BP03
BP05
BP10
BP11
BP16
BT01
BT02
BT11
BT12
BT20
BT30
BT35
BT40
BT42
BT43
BT44
BT45
BT46
BT48
BT51
BT55
BT56
BT57
EB01
EB02
EB03
FC01
FC07
KF01
MA01
MA04
MA06
MA07
MA10
MA13
MA15*
MA20
MA21
MA22
RF01
RF06
SF01
Integral control unit
Inverter
Programming unit
Heating circuit flow rate sensor
Condensate float switch
Extract air humidity sensor
High pressure sensor
Low pressure sensor
High pressure (HP) pressure switch
Heating circuit (water) pressure sensor
Air differential pressure sensor
Signal anode pressure switch
Heating flow temperature sensor‌- ‌PT 1000
Heating return temperature sensor‌- ‌PT 1000
Temperature sensor, flow - HP - Pt1000
Temperature sensor, return - HP - Pt1000
DHW cylinder temperature sensor
Outside temperature sensor
Extract air temperature sensor
Temperature sensor, hot gas‌- ‌PT 1000
Temperature sensor, condenser (frost protection)
Temperature sensor, evaporator discharge
Temperature sensor, defrost end (evaporator inlet)
Evaporator discharge temperature sensor‌- ‌PT 1000
Compressor intake temperature sensor‌- ‌PT 1000
Oil sump temperature sensor
Compressor temperature limiter
High limit safety cut-out for MFG
Temperature controller, booster heater 2 kW
(optional)
High limit safety cut-out for 2 kW booster heater
(optional)
Booster heater MFG
Booster heater cylinder BGC 2 kW (optional)
Oil sump heater
Inverter fuse
Condensate pump fine-wire fuse
Compressor contactor
Compressor motor
Motor, electronic expansion valve, evaporator
Motor, electronic expansion valve, heat pipe
Diverter valve, defrost
Circulation pump motor
Motor, condensate pump, bottom plate
Diverter valve motor (heating/DHW/alternative)
Motor, heat pump fan
Motor, supply air fan
Motor, extract air fan
Interference suppression filter
Ferrite ring core
Reset button
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XD01
XD02
XD03
XD04
XD11
XD20
XD21
XD22
XD23
XD24
XD27
XD76
XD77
XD78
XD79
XD80
XE03
XE08
XE09
XE12
XE15
XE16
XE17
AA02-X1
AA02-X2
AA02-X3
AA02-X4
AA02-X5
AA02-X51
AA02-X6
AA02-X7
AA02-X8
AA02-X9
AA02-X10
AA02-X11
AA02-X12
AA02-X13
AA02-X14
AA02-X15
AA02-X16
AA02-X17
AA02-X18
AA02-X19
AA02-X20
AA02-X22
AA02-X23
AA02-X24
AA02-X25
Compressor/HP fan power supply
Instantaneous water heater (MFG) power supply
230 V PCB inputs power supply
Terminals for external temperature sensor and CAN
bus
Booster heater power supply (optional/cylinder)
Terminal
L block terminal
N block terminal
3-pin terminal
4-pin terminal
CAN bus programming unit connector
Diverter valve connector (alternative)
Integral sensor connector
Supply air fan connector
Extract air fan connector
Heat pump fan connector
Clamping plate earth connection for external
Temperature sensor earth terminal
Temperature sensor earth terminal
Control panel earth connection
Clamping plate earth connection
Lower control panel earth connection
Cylinder earth connection
Connector X1, temperature sensor, 8-pin
Connector X2, temperature sensor, 12-pin
Connector X3, circulation pump / ext. pumps
Connector X4, LV input: Pressure and humidity sensor, float switch
Connector X5, pressure transducer HP/LP
Connector X51, flow sensor
Modbus connection
Connector X7, CAN bus
Connector X8, CAN BUS, programming unit
Connector X9, stepper motor
Connector X10 EXV, evaporator
Connector X11 EXV, heat pipe
Connector X12, supply air fan
Connector X13, extract air fan
Connector X14, heat pump fan
Connector X15, input
Connector X16, mains power
Connector X17, output 1
Connector X18, output 2
Connector X19, compressor
Connector X20, DHC input/output
Connector X22, air differential pressure sensor
Connector X23, air differential pressure sensor 2
Connector X24, temperature sensor
USB port‌/ ‌Service plug
LWZ 5 S Plus | 31
Installation
Specification
BT35 BT48 BT12 BT43 BT46 BT45 BT42 BT11
T
T
XD21
L
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
von
AA02-X24
5,6
XE08
XE09
1234
zu
zu
BT35 XD04
1,2 21,22
BP11
p
9
1
3
1
3
1 2 3 4 5
1 2 3 4 5 6 7 8 9
XD01
WP 230V
XD02
1
12
X20
NE Stufe Niedrig IN
NE Stufe Niedrig OUT
NE Stufe Mittel IN
NE Stufe Mittel OUT
NE Stufe HOCH IN
NE Stufe HOCH OUT
X19
Verdichter L‘
Verdichter L
X18
Fenster AUF
Ölsumpf
HK2/ 2. W W-Speicher
1
5
zu MA20
GND
IN
+5V
FE
GND
RS48
RS48
+Ub
+12V
CAN
CAN
GND
AA02
X25
+12V
CAN
CAN
GND
EB03
XE17
(Speicher)
XD11 L1 L2 PE
BT56
12
T>
Scha
+5V
GND
Feuc
+5V
GND
P He
+5V
HD-S
+Ub
ND-S
+Ub
HZK 400V
BT57
10
X2
X22
1
XE15
MFG 400V
1
X1
1
3
1
PE
N
L2
L1
PE
N
L3
L2
L1
8
X23 X24
6
XE03
1234
USB
FA
SL
UMV
XD03
T
HK2 Kühl O/K
T
Steuerung
T
L
EVU
T
N
T
N
L
L‘
L
N
L‘
L
L‘
L
N
L
N
L
N
Mi ZU
Mi AUF
1 2 3 4
T
XD22
1 2 3 4
N
1 2 3 4 5
22
11 21
XE12
EB02
optional
1
KF01
2
4
6
A1
1
3
5
A2
MA22
X17
MA21
6
Synchronmotor Heizen
Synchronmotor WW
Abtauen/ Kühlen
Mischer ZU
Mischer AUF
FC01
Schrittmotor
Phas
Phas
Phas
Phas
+12V
EXV
Verdampfer
Phas
Phas
Phas
Phas
+12V
EXV
Heat-Pipe
Phas
Phas
Phas
Phas
+12V
ZuluftLüfter
GND
Dreh
+10V
PWM
AbluftLüfter
GND
Dreh
+10V
PWM
WP-Lüfter
GND
Dreh
+10V
PWM
Schn
STB
O/K
EVU
Sign
Klixo
HD-W
L N
X16
1 2 3 4
N L
SF01
1
2
XD24
XE16
L N PE
RF01
L*N*PE*
XD20 1 2 3 4 5 6 7 8 9 10 11 12 13 14
- N N N PE L L - - - - L‘ L‘ -
L N PE
10
AA04
von
AA02-X6
2,3,4
XD23
1 2 3
PE N L
U V W PE
V
M
3~
MA01
W
BT55
11 21 31
1~
PE
N
L
U
FC07
MA10
1~
PE
N
L
1
32 | LWZ 5 S Plus
von
AA02-X3
3,4
T>
12 22 32
EB01
www.stiebel-eltron.com
MA13
Installation
Specification
BT02 BT20 BT44 BT40 BT01 BT30
TV
TR
UP SOL UP HK2
CAN 2
TS
TX
GND
PWM
0-10V
GND
PWM
0-10V
+12V
CAN-H
GND
CAN-L
T
T
T
T
T
T
XE09
12345
12345
wh
rd
bk
ye
bn
ye
gn
gn
wh
bn
ye
XE08
wh
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
234
von
AA02-X24
3,4
von X7
1,2,3,4
X1
1
10
X2
X3
BL01
10
Schalter Bodenblech
+5V
GND
Feuchtesensor
+5V
GND
P Heizung
+5V
%
U
4 3 5
p
BP10
p
BP01
p
BP03
3
gn
bn
4
rd
X4
1
ye
1
12
bk
1
BM 0 3
zu
MA10
bn
wh
bn
wh
1
1
3
2
X5
1
1
wh
6
2
HD-Sensor
+Ub
ND-Sensor
+Ub
3
AA02
Schrittmotor
USB
EXV
Verdampfer
EXV
Heat-Pipe
ZuluftLüfter
AbluftLüfter
WP-Lüfter
+12V
CAN-H
CAN-L
GND
X7
+12V
CAN-H
CAN-L
GND
X8
Phase 4
Phase 3
Phase 2
Phase 1
+12V
X9
L N
1
BF01
zu AA04
3,4,5
1
4
rd
wh
ye
bk
1
4
ye
wh
bk
rd
1
5
wh
bn
gn
ye
gy
1
5
Phase 4
Phase 3
Phase 2
Phase 1
+12V
X10
Phase 4
Phase 3
Phase 2
Phase 1
+12V
X11
GND
Drehzahl
+10V
PWM
X12
GND
Drehzahl
+10V
PWM
X13
Schnelllüftung
STB
O/K Betrieb
EVU
Signalanode
Klixon
HD-Wächter
X16
zu XD04
9,10, 11,12
ye
rd
bk
wh
4
XD27
gy
wh
gn
ye
5
bk
ye
rd
og
gy
1
4
gn
4
gn
4
gn
wh
bn
ye
X14
1
M
MA04
M
MA06
bn
gn
ye
wh
bn
gn
ye
wh
4
bn
gn
ye
wh
1
2
3
4
rd
bu
ye
wh
1
2
3
4
rd
bu
ye
wh
X15
1
2
3
4
rd
bu
ye
wh
M
1~
N
L
N
M
1~
L
MA21
N
M
1~
L
MA22
RF06
8
MA15*
alternativ
4
wh
bn
ye
1
M
1~
4
wh
bn
ye
1
1
2
3
4
5
XD76
bk
ye
rd
og
gy
1
bn
5
MA20
XD80
1
XD79
XD78
2
von
XD01
8,9,10
MA13
BP16
von XD24
und XE12
BT51
D0000081636
b
BP05
k
w
d r
w
2 1
>p
1~
h
4 3
von XD24
und XE12
PE
N
L
1
X6
GND
Drehzahl
+10V
PWM
bk
bu
bn
5
FE
GND
RS485A
RS485B
+Ub
h
X25
X51
3
GND
IN
+5V
AA06
A10
XD04
TA
T
42 BT11
MA15*
alternativ
MA07
www.stiebel-eltron.com
LWZ 5 S Plus | 33
Installation
Specification
10.3 Connection examples
10.4 Application range
Example‌1‌: Without power-OFF periods
Heating
WP
MFG
XD02
1
2
XD01
3 4
5
6
7
8
70
Steuerung
9
1
XD03
60
3
50
2
4 XE03
1
EVU
40
30
10
1
0
-30
-20
-10
0
10
20
30
40
D0000043515
20
1 Application range limits
X Outside temperature [°C]
Y Flow temperature [°C]
3/N/PE ~ 50Hz 400V
WP
MFG
Steuerung
1
2/N/PE ~ 50Hz 230V
D0000077201
10.5 Sensor resistance values
1/N/PE ~ 50Hz 230V
Heat pump‌/ ‌Heat pump fan
Electric emergency/booster heater
Control
Underfloor heating thermostat (option) or safety equipment terminal for stove / fireplace
Example‌2: Blocking time for electric emergency/booster
heater
WP
MFG
XD01
XD02
1 2 3 4 5 6 7 8 9
Steuerung
XD03
3 4 XE03
1 2
EVU
PE
N
L2
L1
PE
N
L3
L2
L1
Temperature in °C
-30
-20
-10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
Pt1000 sensor
Resistance in Ω
882
922
961
1000
1039
1078
1097
1117
1155
1194
1232
1271
1309
1347
1385
1423
1461
PTC sensor
Resistance in Ω
--1367
1495
1630
1772
1922
2000
2080
2245
2417
2597
2785
2980
3182
3392
-----
1
Note
When measuring with a multimeter, the resistance values
serve only to identify faulty or incorrect sensors. Measuring with a multimeter is too imprecise to test for accuracy.
2
L1 L2 N PE
2/N/PE ~ 50Hz 230V
L1 L2 L3 N PE
3/N/PE ~ 50Hz 400V
WP
MFG
Steuerung
1
2
L1
N PE
1/N/PE ~ 50Hz 230V
D0000077202
M
1
Heat pump‌/ ‌Heat pump fan
Electric emergency/booster heater
Control
Underfloor heating thermostat (option) or safety equipment terminal for stove / fireplace
Time switch for power-OFF periods
34 | LWZ 5 S Plus
www.stiebel-eltron.com
Installation
Specification
10.6 Output graph
6
5
1
2
3
4
4
5
2
X
Y
1
2
-20
-15
-10
-5
0
5
Outside temperature [°C]
Heating output [kW]
max. W35
max. W45
3
4
5
6
10
15
D0000082437
6
3
20
max. W55
min. W35
min. W45
min. W55
10.7 Available external head of the circulation pump
900
800
700
600
1
500
2
400
3
300
4
200
0
0
0,2
X Flow rate [m3/h]
Y Pressure [hPa]
1 Pump rate‌ 100‌ %
www.stiebel-eltron.com
0,4
0,6
0,8
1
1,2
1,4
1,6
1,8
D0000039604
100
2 Pump rate‌ 85‌ %
3 Pump rate‌ 65‌ %
4 Pump rate‌ 45‌ %
LWZ 5 S Plus | 35
Installation
Specification
10.8 Fan curve
220
200
180
160
140
120
1
100
2
0,30
80
0,35
60
0,40
40
0
X
Y
1
2
0.30
0.35
0.40
0.45
0.50
0,50
80
100
120
140
160
180
200
220
240
260
280
300
320
D0000042009
0,45
20
Application range
Air flow rate [m³/h]
Average value, static pressure [Pa]
Maximum fan curve
System curves
Specific power consumption‌0.30‌Wh/m³
Specific power consumption‌0.35‌Wh/m³
Specific power consumption‌0.40‌Wh/m³
Specific power consumption‌0.45‌Wh/m³
Specific power consumption‌0.50‌Wh/m³
36 | LWZ 5 S Plus
www.stiebel-eltron.com
Installation
Specification
10.9 Data table
The output data refers to new appliances with clean heat exchangers. The power consumption of the integral auxiliary drives
represents the maximum value and may vary subject to operating
point. The power consumption of the integral auxiliary drives is
included in the output details of the appliance (to EN 14511).
LWZ 5 S Plus
201291
Heating output
Heating output at A-7/W35 (EN 14511)
Heating output at A2/W35 (EN 14511)
Heating output at A7/W35 (EN 14511)
Heating output, emergency/booster heater
Max. heating output
Power consumption
Power consumption at A-7/W35 (EN 14511)
Power consumption at A2/W35 (EN 14511)
Power consumption at A7/W35 (EN 14511)
Coefficient of performance
COP at A-7/W35 (EN 14511)
COP at A2/W35 (EN 14511)
COP at A7/W35 (EN 14511)
Sound emissions
Sound power level (EN 12102)
Sound power level, full load (EN 12102)
Application limits
Min. application limit, heat source
Max. application limit, heat source
Max. pressure drop, outdoor air
Min. installation room volume
DHW temperature with heat pump at A2
Hydraulic data
Cylinder capacity
Energy data
Energy efficiency class, heat pump W55
Energy efficiency class for DHW heating with load profile XL
Energy efficiency class for DHW heating (load profile), moderate climate
Energy efficiency class
Electrical data
Max. power consumption, fan
Nominal power consumption, fan
Power consumption, fan
Power consumption, circulation pump
Max. power consumption without emergency/booster heater
Fuse protection, emergency/booster heater
Max. fuse protection, compressor
Compressor fuse protection
Fuse protection, heat pump fan
Control unit fuse protection
Rated voltage, emergency/booster heater
Rated voltage, compressor
Rated voltage, heat pump fan
Rated voltage, control unit
Compressor phases
Heat pump fan phases
Control unit phases
Frequency
Total power consumption
Starting current (with/without starting current limiter)
Emergency/booster heater phases
www.stiebel-eltron.com
kW
kW
kW
kW
kW
5.50
5.16
4.40
2.9 / 5.8 / 8.8
14.30
kW
kW
kW
2.11
1.38
0.93
2.61
3.74
4.74
dB(A)
dB(A)
52
59
°C
°C
Pa
m³
°C
-20
35
25
7
50
l
235
A+
A
A (XL)
A++/A++
W
W
W
W
kW
A
A
A
A
A
V
V
V
V
Hz
A
A
170
100
100
< 45
5.30
3 x B 16
1 x B 25
1 x B 16
1 x B 16
B 16
400
230
230
230
1/N/PE
1/N/PE
1/N/PE
50
20
-/8
3/N/PE
LWZ 5 S Plus | 37
Installation
Specification
LWZ 5 S Plus
Versions
Refrigerant
Refrigerant charge
CO2 equivalent (CO2e)
Global warming potential of the refrigerant (GWP100)
IP rating
Filter class, extract air
Filter class, supply air
Filter class, outdoor air
Application range, living space
Dimensions
Height when tilted
Height
Width
Depth
Weights
Weight, function module
Weight, cylinder module
Weight, empty
Weight, full
Connections
Heating connection
DHW connection
Supply air/extract air connection
Condensate drain
Outdoor air/exhaust air connection
Heating water quality requirements
Water hardness
Conductivity (softening)
Conductivity (desalination)
Chloride
Oxygen 8-12 weeks after filling (softening)
Oxygen 8-12 weeks after filling (desalination)
pH value (with aluminium fittings)
pH value (without aluminium fittings)
Values
Heat recovery level up to
Heating flow rate (EN 14511) at A7/W35, B0/W35 and 5 K
Min. heating flow rate
Supply air/extract air flow rate
Nominal air flow rate
Outdoor air/exhaust air flow rate
Available external pressure, ventilation at 230 m3/h
Available external pressure, outdoor air/exhaust air
Safety valve, DHW
Max. flow temperature
Safety valve, heating
m²
R410A
2.95
6.16
2088
IP1XB
ISO Coarse > 60 % (G4)
ISO Coarse > 60 % (G4)
ISO Coarse > 30 % (G2)
< 220
mm
mm
mm
mm
2020
1885
1430
735
kg
kg
kg
kg
223
177
400
650
mm
mm
DN 22
DN 22
DN 160
22
410x155 oval
kg
t
°dH
μS/cm
μS/cm
mg/l
mg/l
mg/l
≤3
<1000
20-100
<30
< 0.02
< 0.1
8.0-8.5
8.0-10.0
%
m³/h
m³/h
m³/h
m³/h
m³/h
Pa
Pa
MPa
°C
MPa
90
0.775
0.70
80-300
240
1000
100
50
1
60
0.30
m
LWZ 5 S Plus
201291
2000
Further details
Maximum altitude for installation
38 | LWZ 5 S Plus
www.stiebel-eltron.com
NOTES
www.stiebel-eltron.com
LWZ 5 S Plus | 39
Deutschland
STIEBEL ELTRON GmbH & Co. KG
Dr.-Stiebel-Straße 33 | 37603 Holzminden
Tel. 05531 702-0 | Fax 05531 702-480
info@stiebel-eltron.de
www.stiebel-eltron.de
Verkauf
Tel. 05531 702-110 | Fax 05531 702-95108 | info-center@stiebel-eltron.de
Kundendienst
Tel. 05531 702-111 | Fax 05531 702-95890 | kundendienst@stiebel-eltron.de
Ersatzteilverkauf Tel. 05531 702-120 | Fax 05531 702-95335 | ersatzteile@stiebel-eltron.de
Australia
France
Austria
STIEBEL ELTRON SAS
7-9, rue des Selliers
B.P 85107 | 57073 Metz-Cédex 3
Tel. 0387 7438-88 | Fax 0387 7468-26
info@stiebel-eltron.fr
www.stiebel-eltron.fr
Slovakia
TATRAMAT - ohrievače vody s.r.o.
Hlavná 1 | 058 01 Poprad
Tel. 052 7127-125 | Fax 052 7127-148
info@stiebel-eltron.sk
www.stiebel-eltron.sk
Switzerland
STIEBEL ELTRON Ges.m.b.H.
Gewerbegebiet Neubau-Nord
Margaritenstraße 4 A | 4063 Hörsching
Tel. 07221 74600-0 | Fax 07221 74600-42
info@stiebel-eltron.at
www.stiebel-eltron.at
Hungary
STIEBEL ELTRON Kft.
Gyár u. 2 | 2040 Budaörs
Tel. 01 250-6055 | Fax 01 368-8097
info@stiebel-eltron.hu
www.stiebel-eltron.hu
STIEBEL ELTRON AG
Industrie West
Gass 8 | 5242 Lupfig
Tel. 056 4640-500 | Fax 056 4640-501
info@stiebel-eltron.ch
www.stiebel-eltron.ch
Belgium
Japan
Thailand
STIEBEL ELTRON bvba/sprl
't Hofveld 6 - D1 | 1702 Groot-Bijgaarden
Tel. 02 42322-22 | Fax 02 42322-12
info@stiebel-eltron.be
www.stiebel-eltron.be
China
STIEBEL ELTRON (Tianjin) Electric Appliance
Co., Ltd.
Plant C3, XEDA International Industry City
Xiqing Economic Development Area
300085 Tianjin
Tel. 022 8396 2077 | Fax 022 8396 2075
info@stiebeleltron.cn
www.stiebeleltron.cn
Czech Republic
STIEBEL ELTRON spol. s r.o.
K Hájům 946 | 155 00 Praha 5 - Stodůlky
Tel. 251116-111 | Fax 235512-122
info@stiebel-eltron.cz
www.stiebel-eltron.cz
Finland
STIEBEL ELTRON OY
Kapinakuja 1 | 04600 Mäntsälä
Tel. 020 720-9988
info@stiebel-eltron.fi
www.stiebel-eltron.fi
4<AMHCMO=dijbha>
NIHON STIEBEL Co. Ltd.
Kowa Kawasaki Nishiguchi Building 8F
66-2 Horikawa-Cho
Saiwai-Ku | 212-0013 Kawasaki
Tel. 044 540-3200 | Fax 044 540-3210
info@nihonstiebel.co.jp
www.nihonstiebel.co.jp
Netherlands
STIEBEL ELTRON Asia Ltd.
469 Moo 2 Tambol Klong-Jik
Amphur Bangpa-In | 13160 Ayutthaya
Tel. 035 220088 | Fax 035 221188
info@stiebeleltronasia.com
www.stiebeleltronasia.com
United Kingdom and Ireland
STIEBEL ELTRON Nederland B.V.
Daviottenweg 36 | 5222 BH 's-Hertogenbosch
Tel. 073 623-0000 | Fax 073 623-1141
info@stiebel-eltron.nl
www.stiebel-eltron.nl
STIEBEL ELTRON UK Ltd.
Unit 12 Stadium Court
Stadium Road | CH62 3RP Bromborough
Tel. 0151 346-2300 | Fax 0151 334-2913
info@stiebel-eltron.co.uk
www.stiebel-eltron.co.uk
Poland
United States of America
STIEBEL ELTRON Polska Sp. z O.O.
ul. Działkowa 2 | 02-234 Warszawa
Tel. 022 60920-30 | Fax 022 60920-29
biuro@stiebel-eltron.pl
www.stiebel-eltron.pl
STIEBEL ELTRON, Inc.
17 West Street | 01088 West Hatfield MA
Tel. 0413 247-3380 | Fax 0413 247-3369
info@stiebel-eltron-usa.com
www.stiebel-eltron-usa.com
Russia
STIEBEL ELTRON LLC RUSSIA
Urzhumskaya street 4,
building 2 | 129343 Moscow
Tel. 0495 7753889 | Fax 0495 7753887
info@stiebel-eltron.ru
www.stiebel-eltron.ru
Irrtum und technische Änderungen vorbehalten! | Subject to errors and technical changes! | Sous réserve
d‘erreurs et de modifications techniques! | Onder voorbehoud van vergissingen en technische wijzigingen! |
Salvo error o modificación técnica! | Excepto erro ou alteração técnica | Zastrzeżone zmiany techniczne i
ewentualne błędy | Omyly a technické změny jsou vyhrazeny! | A muszaki változtatások és tévedések jogát
fenntartjuk! | Отсутствие ошибок не гарантируется. Возможны технические изменения. | Chyby a
technické zmeny sú vyhradené!
Stand 9442
A 338917-41310-9454
B 336514-41310-9454
STIEBEL ELTRON Australia Pty. Ltd.
294 Salmon Street | Port Melbourne VIC 3207
Tel. 03 9645-1833 | Fax 03 9645-4366
info@stiebel.com.au
www.stiebel.com.au
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