Stiebel Eltron Lwz 180 Central Instruction Manual (+ PDF)

STIEBEL ELTRON LWZ 180 Central Instruction Manual

BEDIENUNG UND INSTALLATION OPERATION AND INSTALLATION UTILISATION ET INSTALLATION USO E INSTALLAZIONE
Zentrales Lüftungsgerät mit Wärmerückgewinnung | Central ventilation appliance with heat recovery | Ventilation mécanique contrôlée double flux | Apparecchio di ventilazione centralizzata con recupero di calore
» LWZ 180 » LWZ 280 » LWZ 180 Enthalpie » LWZ 280 Enthalpie

ENGLISH

OPERATION General information

OPERATION

f This symbol indicates that you have to do something. The action you need to take is described step by step.

1. General information
The chapters “Special information” and “Operation” are intended for appliance users and qualified contractors. The chapter “Installation” is intended for qualified contractors.
Note Read these instructions carefully before using the appliance and retain them for future reference. Pass on these instructions to a new user if required.

These symbols show you the software menu level (in this example level 3).
1.3 Information on the appliance
Connections
Symbol Meaning Outdoor air
Exhaust air

1.1 Safety instructions
1.1.1 Structure of safety instructions
KEYWORD Type of risk
! Here, possible consequences are listed that may result
from failure to observe the safety instructions. f Steps to prevent the risk are listed.

1.1.2 Symbols, type of risk

Symbol
!

Type of risk Injury

Electrocution

Burns (burns, scalding)

1.1.3 Keywords

KEYWORD DANGER
WARNING
CAUTION

Meaning
Failure to observe this information will result in serious injury or death.
Failure to observe this information may result in serious injury or death.
Failure to observe this information may result in non-serious or minor injury.

1.2 Other symbols in this documentation
Note General information is identified by the adjacent symbol. f Read these texts carefully.

Extract air
Supply air
1.4 Standardised output data
Information on determining and interpreting the specified standardised output data
Standard: EN 13141-7 The output data specifically mentioned in text, diagrams and technical datasheet has been determined in line with the test conditions specified in the standard shown in the heading of this chapter. Generally, these standardised test conditions will not fully meet the conditions found at the installation site of the system user. Depending on the chosen test method and the extent to which the selected method deviates from the conditions specified in the standard shown in the heading of this chapter, any deviations can have a considerable impact. 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. A confirmation of the specified output data can only be obtained if the conditions applicable to the relevant test match those of the standard shown in the heading of this chapter.
1.5 Units of measurement
Note All measurements are given in mm unless stated otherwise.

Symbol
!

Meaning
Material losses (appliance damage, consequential losses and environmental pollution) Appliance disposal

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OPERATION Safety

2. Safety
2.1 Intended use
The appliance is designed as a mechanical ventilation unit with central supply and extract air routing.
The appliance is intended for domestic use. It can be used safely by untrained persons.
The appliance can also be used in non-domestic environments, e.g. in small businesses, as long as it is used in the same way. Any other use beyond that described shall be deemed inappropriate. Observation of these instructions and of the instructions for any accessories used is also part of the correct use of this appliance.
The following are deemed inappropriate: – Use extract air containing grease, explosive gases, dust or
adhesive aerosols – Connect cooker hoods or vented tumble dryers to the ventila-
tion system
Never adjust the settings of supply and extract air vents inside the rooms. These have been set up by a qualified contractor during commissioning.

The air flow rate is preset for each fan setting by the qualified contractor during commissioning. Constant flow rate control ensures that the air flow rates through the supply air and extract air fans are achieved irrespective of the duct pressure.

Operating Fan

mode

stage

Humidity prot. 0

Stage 1

Stage 2

Intensive ven- 3 tilation

Time program 0 to 2 mode

Description
Necessary ventilation for ensuring that the building structure is protected under normal conditions of use with somewhat reduced moisture loads, e.g. during temporary absence of users and no drying of washing in the residential unit.
Reduced ventilation is the ventilation necessary to meet hygiene standards and ensure protection of the building structure (moisture level) under standard conditions of use with partially reduced moisture and pollutant loads, e.g. as a result of intermittent user absence.
Standard ventilation is the ventilation necessary to meet hygiene standards and ensure protection of the building structure when users are present.
Intensive ventilation is increased ventilation with a higher flow rate to reduce load peaks, e.g. for rapid ventilation during or after a party. You can switch on intensive ventilation with the programming unit or with an optionally connectible external pushbutton.
Time controlled fan program with various adjustable fan settings.

2.2 General safety instructions

WARNING Injury The appliance may be used by children over 8 years of

age and persons with reduced physical, sensory or men-

tal capabilities or a lack of experience and expertise,

provided that they are supervised or they have been

instructed on how to use the appliance safely and have

understood the potential risks. Children must never play

with the appliance. Cleaning and user maintenance must

not be carried out by children without supervision.

WARNING Injury The discharged cold air can cause condensation to be

formed in the vicinity of the air discharge.

f Ensure that no risk of slipping due to wet conditions

or ice formation occurs on adjacent footpaths and

driveways at low temperatures.

2.3 Test mark
See type plate on the appliance.
3. Appliance description
The appliance draws in outdoor air with a fan. A second fan extracts stale air from the rooms containing odours or moisture, e.g. kitchen, bathroom, WC. Extract air and outdoor air are routed through separate air ducts. Extract air and outdoor air are filtered by separate filters.
The extract air and outdoor air flow through a cross-countercurrent heat exchanger. The outdoor air absorbs heat taken from the extract air. This enables a large proportion of thermal energy to be recovered.

LWZ 180 Enthalpie, LWZ 280 Enthalpie: Enthalpy heat exchanger
The enthalpy heat exchanger is a highly efficient, moisture-transferring countercurrent heat exchanger with a selective membrane. The membrane helps to recover moisture from the extract air and transfer it to the supply air. This prevents the relative humidity in the rooms from dropping too low during the winter months.
3.1 Frost protection
The appliance has a frost protection controller, which ensures that it works to optimum effect even at low outside temperatures. If the outdoor air temperature falls below the selected frost protection value, the electric preheating coil is switched on. This prevents the cross-countercurrent heat exchanger from freezing up. When the preheating coil is active, the “Frost protection” symbol appears on the display.
3.2 Bypass mode
The appliance has an integral bypass damper. The bypass damper enables the supply of fresh air to bypass the heat exchanger.
Utilising cool outdoor air
Cool, fresh air is required on summer nights in particular. In such cases, in automatic mode, as much of the warm air in the home as possible is displaced by cooler fresh air.
Utilising warm outdoor air
In spring and autumn, the appliance can increase the room temperature by opening the bypass damper in automatic mode and drawing warmer outdoor air into the building.

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ENGLISH

OPERATION Settings

4. Settings
4.1 Switching the appliance on

D0000064394

f Plug the appliance into a standard socket.
4.2 Programming unit
An external programming unit can be connected to the appliance in addition to the factory-installed programming unit.

4.2.3 Controls

Operating Description controls

“MENU” but- Press this button for approx. one second to call up the menu

ton

from the home screen.

Within the menu, press this button to go back one menu level at a time.

When setting a parameter value, press this button to exit setting of the parameter. Any changes made will not be saved in this case.

“OK” button Pressing the “OK” button within the menus confirms the selected parameter and takes you to the next menu level down.

In order to set the parameter, you must first make it editable by pressing the “OK” button. Then you can change the value with the Touch-Wheel.

Once you have set the parameter, confirm your entry with the “OK” button.

Touch-Wheel From the home screen, you can select the following parameters by turning the Touch-Wheel: “Humidity prot.”, fan settings “Stage 1” or “Stage 2”, “Time program mode”, “Intens. vent.”, “Favourites”, “Direct selec.” and “Function block”. Confirm the selection with the “OK” button.

Use the Touch-Wheel to select a parameter or value in the menu.

If you turn the Touch-Wheel quickly, the increment size changes after a while.

D0000064711

1 Text field 2 Appliance status symbols 3 Touch-Wheel 4 “MENU” button 5 “OK” button

4.2.1 Display
If you do not perform any settings for a while, the display illumination switches off and the home screen appears.
Press any button to switch the illumination back on again.

4.2.2 Symbols

Symbol 0
1

Description
Time program mode: The set fan program is active. Depending on the setting, the unit is operated at various fan stages. The number indicates the fan setting.

Intens. vent.: The unit runs at the highest fan setting for the set period of time. Condensate prevention (depending on unit): Condensate prevention is active. Filter change: Change the filters when this symbol appears.
Fault: The symbol is displayed permanently in the event of faults that do not impair the basic function of the unit. Bypass mode: The air flow bypasses the heat exchanger. No heat is recovered. Frost prot.: The preheating coil for frost protection is switched on.
Fan disable: The symbol is displayed in the event of the “Enable fan” is set to “Off”.

Note Gloves, wet hands or moisture on the touch-sensitive operating controls make it more difficult to make entries.
4.2.4 Operation f Press the “MENU” button to access the menus from the home
screen. f Turn the Touch-Wheel to move to the next parameter. f Press “OK” to change the value of the parameter displayed. f Adjust the value with the Touch-Wheel. f Press “OK” to save the selected value. If you do not confirm
the change with the “OK” button, the change will not be saved.
If you do not make any changes for a while, the display automatically switches from the menu structure back to the home screen. Parameter changes made before this which had not yet been confirmed with OK are lost.
If the Touch-Wheel and buttons are not used for a while, the programming unit is locked. f Touch “MENU” for three seconds to activate the programming
unit.

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OPERATION Settings

4.3 Parameters adjustable from the home screen
4.3.1 Activating humidity protection f In the home screen, turn the Touch-Wheel until “Humidity
prot.” appears. Press “OK”.
Humidity protection control is active. The moisture in the extract air is measured and if humidity is high, the unit starts to ventilate.
4.3.2 Selecting the fan setting f Using the Touch-Wheel, select the fan setting “Stage 1” or
“Stage 2”. Press “OK”.
The selected fan setting is active.
4.3.3 Activating time program mode
The “Time program mode” symbol indicates that the fan program is activated. f If the fan program is not activated, select “Time program
mode”. Press “OK”.
The displays shows the “Time program mode” symbol.
For times where there is no fan program defined, the unit operates at fan stage 2.
Note If you switch the unit to Time program modea fan program must be entered in the “Programs” menu. Otherwise the appliance continues to run without a time limit in fan stage 2.

4.3.5 Setting favourites f Select “Favourites” using the Touch-Wheel. Press “OK”.
This will take you from the standard view directly to the favourites in the “Settings” menu. f Select the required favourites. Press “OK”.
The set favourites F1, F2 and F3 are displayed on the home screen.
4.3.6 Activating function block f Select “Function block” using the Touch-Wheel. Press “OK”.
A 60 second countdown and “Maintenance” are displayed.
Then you can wipe the programming unit clean without inadvertently changing any settings. The function blockterminates after 60 seconds.
4.3.7 Direct selec.
Use direct selection to move from the standard view directly to the adjustable or readable parameters. f Select “Direct selec.” using the Touch-Wheel. Press “OK”.
Note The table shows only the direct selection parameters to be set by the appliance user. The other direct selection parameters shown on the display may only be set by a qualified contractor or the service department.

4.3.4 Switching on Intens. vent. f Switch on Intens. vent. with the Touch-Wheel and the “OK”
button or with an external pushbutton.
When intensive ventilation is switched on, the “Intens. vent.” symbol is shown.
After expiry of the period of time set under “Intens. vent. time”, the unit switches back to the previously selected fan setting.
When intensive ventilation switches off, the “Intens. vent.” symbol goes out.

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ENGLISH

OPERATION Settings

Direct selection parameters

LWZ 180, LWZ 180 Enthalpie

LWZ 280, LWZ 280 Enthalpie

Description

Code Unit Min. Max. Options level

Stand- Min. Max. Options ard

Standard

P1 Set room temperature

A0 °C 5 28

5 28

P2 Intens. vent. time

A0 min. 1 240

1 240

P3 Operating mode heat recovery A0 bypass

Disabled (0) | Bypass/window contact (1) | Outdoor air routing automatic (2) | (2) Extract air routing autom. (3)

P4 Filter reset

Off | On

Off

Off | On

Off

P28 Enable fan

Off | On

Off

Off | On

Off

P35 Cooling/heating, heat recovery A0 bypass

Cooling/heating (1) |

(1)

Cooling (2) |

Heating (3)

Cooling/heating (1) |

(1)

Cooling (2) |

Heating (3)

P80 Day

P81 Time

00:00 23:59

4.4 Menus

Note Some parameters are protected by a code and can only be set by a qualified contractor or the service department. Depending on the set code, not all parameters may be displayed in the individual menus.

f Press the “MENU” button to access the menus from the home screen.

Menu Info Diagnostics Programs Settings

Description Information about the actual values of the unit Fault messages, operating time, maintenance intervals Fan program Adjustable values and functions

4.4.1 “Info” menu
Info Bypass status Extract air temp. Extract air hum.

Value Off | On °C %

4.4.2 “Diagnostics” menu
Diagnostics Notification list Filter runtime Filter reset

Value Off | On h Off | On

Diagnostics
Notification list The faults most recently registered by the unit are stored in the notification list. The most recent fault is stored in #1, the oldest error in #10. If no faults are entered, dashes are shown. Possible faults are listed for qualified contractors in the “Troubleshooting” chapter.
Filter runtime The filter runtime is dependent on the operating conditions and has been defined by the qualified contractor.
Filter reset f After changing the filters, set the “Filter reset” to “On”. The unit resets the filter runtime to 0 and the “Filter reset” is automatically reassigned the value “Off”. The filter change warning signal goes out.

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OPERATION Settings

4.4.3 “Programs” menu
Programs Fan program

Value
Monday Tuesday Wednesday Thursday Friday Saturday Sunday Monday – Friday Saturday – Sunday Monday – Sunday

Programs
Fan program
Note For times where there is no fan program defined, the unit operates at fan stage 2. You cannot switch on fan stage 3 with fan programs.
For the fan programs, you can specify a fan setting, time, day of week or time block.
Setting switching time pairs
You can set three switching time pairs for each day of the week or time block. The switching time pairs are shown on the display, to the right of the clock.
Each switching time pair consists of a start time and an end time. After a switching time pair has expired, the unit switches to “Stage 2” operating mode.
Periods around midnight
Switching time pairs can be programmed only up to 24:00. If you want to choose periods that extend beyond midnight, you will need to set an additional switching time pair for the following day. f In the “Programs” menu, select “Fan program” using the
Touch-Wheel. Press “OK”. f Select a day of the week or a time block. Press “OK”. f Select one of the three switching time pairs. Press “OK”. f Select “Stage”. Press “OK”. f Select the fan setting. Press “OK”. f Select “Start”. Press “OK”. f Set the start time. Press “OK”. f Select “End”. Press “OK”. f Set the end time. Press “OK”.
The fan program is now set. f In standard view, select “Time program mode”. Press “OK” to
activate the fan program.

Example
Monday to Friday Saturday, Sunday

Switching time pairs 06:00 – 22:00 22:00 – 06:00 07:00 – 23:00 23:00 – 07:00

Stage 2 1 2 1

Fan program

Stage

Day of the week or time block

Monday – Friday

Saturday – Sunday

Start
22:00 00:00 23:00 00:00

End
24:00 06:00 24:00 07:00

For times where there is no fan program defined, the unit operates at fan stage 2.
Deleting switching time pairs f To delete a switching time pair, select the “Start” or “End” of
a switching time pair. f Turn the Touch-Wheel to the left beyond 00:00 until dashes
“– –” are displayed. Press “OK”.
Resetting one of the times to “–:–” automatically resets the other time of the switching time pair.
Deleting day of the week or time block f Delete all three switching time pairs to delete the fan pro-
gram for the weekday or time block.

Note If there are fan programs with identical times, the higher level switching time pairs and individual days of the week have priority.

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ENGLISH

OPERATION Settings

4.4.4 “Settings” menu

Settings View General Time/date Language
Contrast Brightness Touch sensitivity Touch boost Prog. unit software Air flow rate Favourites F1
F2 F3
Humidity prot. Intensive ventilation Intens. vent. time Heat recovery bypass Set room temperature Operating mode heat recovery bypass
Cooling/heating, heat recovery bypass
Frost protection Condensate prevention Enable fan Ventilation unit Device software version Device software patch Term. device serial no.

Value Code for qualified contractor
Day Hour:Minute German English Francais Nederlands Italiano Polski Cesky Magyar Slovensko Slovensky 1 – 10 % 1 – 10 1 – 10
Only for qualified contractors
Bypass status Extract air temp. Extract air hum. Filter runtime Device software version Device software patch Term. device serial no. Only for qualified contractors
min
°C Disabled Bypass/window contact Outdoor air routing automatic Extract air routing autom. Cooling/heating Cooling Heating Only for qualified contractors Only for qualified contractors Off On

General
Time/date The “Time/date” parameter enables you to set the day of the week and the current time.
Language The “Language” parameter enables you to select the language of the display.
Contrast The “Contrast” menu item allows you to adjust the contrast of the display.
Brightness The “Brightness” menu item allows you to set the brightness of the display.
Touch sensitivity The “Touch sensitivity” parameter enables you to adjust the touch sensitivity of the Touch-Wheel and the sensor keys.
Touch boost The “Touch boost” lets you adjust the reaction speed of the TouchWheel and the sensor keys.
Favourites In the “Favourites” parameter, you can select up to three parameters that you wish to have displayed in the standard display.
Intensive ventilation
Intens. vent. time This parameter defines the runtime for intensive ventilation. After this time has expired, the unit switches back to the previously selected fan setting. If the intensive ventilation is switched on with an external pushbutton, this parameter defines how long the intensive ventilation continues to run after the button has been pushed.

Settings
View
The only parameters displayed in the standard setting are those that have been released for the appliance user and can therefore be accessed without a code
Qualified contracts can use the “View” parameter to enable actual values and parameters, which are reserved for qualified contractors.

Heat recovery bypass
Set room temperature
Use this parameter to specify the outside temperature from which the outdoor air bypasses the heat exchanger by being routed through the bypass damper and directly into the building. f Use the Touch-Wheel to set the required Set room tempera-
ture. Press “OK”.

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OPERATION Maintenance, cleaning and care

Operating mode heat recovery bypass

Disabled
Bypass/window contact
Outdoor air routing automatic
Extract air routing autom.

Effect
Bypass mode is permanently disabled. Air flows through the heat exchanger.
Bypass mode is active. The air flow bypasses the heat exchanger. The “Bypass mode” symbol appears on the display.
Bypass mode operates with summer day detection. This option is set in the delivered condition. The “Bypass mode” symbol appears on the display.
Bypass mode operates subject to the extract air temperature. The “Bypass mode” symbol appears on the display.

Note The qualified contractor can set the parameters mentioned in the description of this parameter. – Temperature to enable heat recovery bypass – Temperature to block heat recovery bypass – Hysteresis for heat recovery bypass – Temp. differential for heat recovery bypass

Outdoor air routing automatic: Bypass mode with summer day detection
For bypass mode to be enabled, the following condition must be met for 60 minutes: – Set room temperature + Temp. differential for heat recovery
bypass < Outdoor air temp.
If all the following conditions are met, the appliance switches to bypass mode. – Extract air temp. – Hysteresis for heat recovery bypass > Out-
door air temp. – Extract air temp. > Set room temperature
If one of the following conditions is met, the appliance terminates bypass mode. – Outdoor air temp. < Temperature to block heat recovery
bypass – Extract air temp. – Hysteresis for heat recovery bypass < Out-
door air temp. – Extract air temp. < Set room temperature
Extract air routing autom.: Bypass mode subject to extract air temperature
For bypass mode to be enabled, the following condition must be met for 60 minutes: – Set room temperature + Temp. differential for heat recovery
bypass < Extract air temp.
This delayed enabling prevents cooling down in spring and autumn.
If all the following conditions are met, the appliance switches to bypass mode. – Extract air temp. – Hysteresis for heat recovery bypass > Out-
door air temp. – Extract air temp. > Set room temperature
If one of the following conditions is met, the appliance terminates bypass mode.

– Outdoor air temp. < Temperature to block heat recovery bypass
– Extract air temp. – Hysteresis for heat recovery bypass < Outdoor air temp.
– Extract air temp. < Set room temperature

Cooling/heating, heat recovery bypass f Set the bypass mode control according to the temperature.

Parameter Effect

Cooling/heating Depending on the temperature, use the outdoor air for cooling or heating.

Cooling

Summertime: Use cool outdoor air.

Heating

Spring and autumn: Use warm outdoor air.

Enable fan You can switch off the fans at any time via the programming unit menu, e.g. to deactivate ventilation if there is a fire.
Effect Off The fans are disabled. The “Fan disable” symbol appears on the display. On The fans are enabled.
4.5 Switching off the appliance

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The appliance has no ON/OFF switch. Disconnect the power supply by pulling the power plug from its socket.

5. Maintenance, cleaning and care
Maintenance by the user is limited to filter inspection and replacement required at certain intervals.

5.1 Replacement filters

Product name
FMS G4-10 180 FMK M5-2 180 FMK F7-2 180

Part Description number

234147 Coarse particle filter mat ISO Coarse > 60 % (G4)

234148 Fine filter 234208 Fine filter

ePM10 50 % (M5) ePM1 50 % (F7)

5.2 Filter inspection and replacement

! Material losses Never operate the unit without filters.
f Inspect the filters for the first time three months after commissioning the appliance.
When the total fan runtimes reach the “Filter change interval” parameter set by the qualified contractor, the programming unit displays the filter change warning signal.
The qualified contractor can lengthen or shorten the interval for inspecting filters depending on the level of contamination.

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OPERATION Troubleshooting

D0000040362
ENGLISH

Change the filters when the filter change warning signal appears. Change the filters if the surface is covered completely in dirt or the filter is discoloured throughout.
Change the filters at least every 12 months.
Filter inspection f Pull the mains plug out of the socket.

3 4 5

3.
2. 1.
5

1 Extract air filter 2 Outdoor air filter 3 Knurled screw for securing the filter drawer 4 Fascia 5 Locking tabs
The fascia is fastened to the appliance with locking tabs. f To disengage the locking tabs, press the grip areas on the
fascia sides. f Remove the fascia from the appliance. f Undo the knurled screws securing the filter drawer. f Pull the filter drawer forwards to remove it from the
appliance. f If necessary, place one or more new filters in the filter
drawer. Ensure that the filters are installed in the intended position. Air flows through the filters from top to bottom. The flow direction is indicated with an arrow on the filter drawer fascia. The outdoor air filter is marked with an arrow. Install the outdoor air filter with the arrow pointing in the flow direction. The extract air filter is imprinted with the words “Clean air side”, which must be at the bottom.

Note There is a label for each filter on the front panel. f Once you have performed a filter change, delete the
previously entered dates in the “Last” and “Next” columns. f Enter today’s date in the “Last” column. f Enter the date for the next filter change in the “Next” column. For the period between “Last” and “Next”, use the value set by the qualified contractor in the “Filter change interval”parameter.
f Order new filters in good time or purchase a filter subscription.
Note If other filters are installed in the system, e.g. filters in the extract air vents or a filter box, also perform the inspection there and change the filter(s) if necessary.
5.3 Care
A damp cloth is all you need to clean the plastic parts. Never use abrasive or corrosive cleaning agents.
6. Troubleshooting
The faults most recently registered by the unit are stored in the notification list.
If you cannot remedy the fault, contact your qualified contractor. To facilitate and speed up your enquiry, please provide the serial number from the type plate (000000-0000-000000).

! Material losses Operate the appliance with at least the recommended filter class. Ensure that filters are fitted accurately so they can function properly.
f Push the filter drawer into the appliance. f Secure the filter drawer with the knurled screws. f Fit the fascia. f Plug the mains plug into a standard socket. f After changing the filters, set the “Filter reset” to “On”.
The unit resets the filter runtime to 0 and the “Filter reset” is automatically reassigned the value “Off”. The filter change warning signal goes out. f Make a note of the filter change date.

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INSTALLATION Safety

INSTALLATION

7. Safety
Only a qualified contractor should carry out installation, commissioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational reliability only if original accessories and spare parts intended for the appliance are used.
WARNING Electrocution Do not reach into the interior of the appliance through the “Outdoor air” connection when the power supply is switched on.

7.2 Instructions, standards and regulations

WARNING Injury In connection with the fire prevention regulations con-

cerning 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.

Note Observe all applicable national and regional regulations and instructions.

7.3 Operation of the appliance in buildings with combustion equipment
The term “combustion equipment” used below includes, for example, tiled stoves, fireplaces and equipment with gas combustion.

WARNING Injury Ventilation units can generate negative pressure in the

dwelling. If combustion equipment is operating at the

same time, combustion exhaust gases can penetrate the

combustion equipment installation room. It is therefore

important to observe a number of points for simulta-

neous operation of a ventilation unit and combustion

equipment.

The engineering, installation and operation of the ventilation unit and combustion equipment must be carried out in accordance with national and regional regulations.

7.3.1 Planning safety measures
Together with the relevant authorities, engineers plan the safety measures that are required for simultaneous operation of a ventilation unit and combustion equipment.
Alternate operation
Alternate operation means that, when the combustion equipment is commissioned, the mechanical ventilation system is switched off and/or cannot be started. Alternate operation must be ensured by appropriate measures, e.g. automatically enforced shutdown of the ventilation unit.
Simultaneous operation
For simultaneous operation of combustion equipment and a mechanical ventilation system, we recommend choosing approved room sealed combustion equipment (in Germany, with DIBt approval).
If open flue combustion equipment is operated in the dwelling at the same time as a ventilation unit, combustion exhaust gases must be prevented from penetrating the home as a result of possible negative pressure in the room.
The ventilation unit may only be operated in combination with intrinsically safe combustion equipment. This combustion equipment has, for example, a draught hood or an exhaust gas monitor and is permitted to be operated in conjunction with ventilation units. Alternatively, external, tested safety equipment can be connected to monitor the operation of the combustion equipment. For example, you can install differential pressure monitoring to monitor the chimney draught and to switch off the ventilation unit in the event of a fault.
The equipment for differential pressure monitoring must fulfil the following requirements: – Monitoring of the differential pressure between the connec-
tion piece to the chimney and the combustion equipment installation room – 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 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 prevented
Note Differential pressure switches that use the pressure differential between the outdoor air pressure and the pressure in the combustion equipment installation room as a response criterion are not suitable.
Note We recommend installing and regularly maintaining a carbon monoxide detector in accordance with EN 50291 for operation of any combustion equipment.

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ENGLISH

INSTALLATION Appliance description

7.3.2 Commissioning When commissioning the ventilation unit, it is important to check and document in the commissioning log that combustion exhaust gases are not penetrating the dwelling in a quantity that is harmful to health.
Commissioning in Germany Acceptance is carried out by the local flue gas inspector.
Commissioning outside Germany Acceptance must be carried out by a specialist. In case of doubt, you must involve an independent expert in the acceptance procedure.
7.3.3 Maintenance Regular maintenance of the combustion equipment is prescribed. Maintenance includes checking the exhaust gas extraction system, the free pipe cross-sections and the safety equipment. The relevant qualified contractor responsible must prove that there is a sufficient flow of combustion air.
7.4 Operating the appliance in passive houses
If operating the appliance in a passive house, the factory-fitted outdoor air filter must be replaced. See chapter “Appliance description / Accessories”.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance: – Wall mounting bracket – 2 star grips as spacers for the rear of the appliance – Condensate drain hose, hose clip, mounting bend – 4 twin nipples, nominal diameter 160
8.2 Accessories
– Programming unit – LWF SDA 180/280: Silencer attachment – For installation of the equipment in passive houses:
ePM1 outdoor air filter 50 % (F7) You can obtain ventilation pipes, extract air and supply air vents and similar accessories from us.
LWZ 180, LWZ 280 – Enthalpy heat exchanger

9. Preparation
9.1 Storage
! Material losses Never store the appliance in dusty places.
9.2 Installation site
! Material losses Never install the appliance outdoors.
! Material losses Check whether the wall can bear the weight of the appliance. A plaster board or metal framed wall is inadequate. Additional measures such as a double skin or additional supports would be needed in such cases.
– Ensure the appliance is level after installation. – The installation room must have an adequate condensate
drain with siphon. – The installation room must be free from the risk of frost. The design and location of the outside air intake must ensure that the least polluted outdoor air in the area of the building and surroundings is drawn in. The outside air intake for controlled mechanical ventilation must be at least the following height above ground level: 700 mm. In addition, you must observe the minimum suction height from the standard applicable to you. Avoid outdoor air intake in locations with polluted air: – car parks and roads – under bushes and trees – in the proximity of waste containers – locations contaminated with microorganisms, dust or ash

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INSTALLATION Preparation
Minimum clearances If you wish to install the silencer attachment, which is available as an accessory, observe the minimum clearances it requires.

400

300

100

400

Installation drawing with silencer attachment
379 147

700

D0000040354

9.3 Transport
! Material losses If possible, transport the appliance to the installation location in its original packaging. If the appliance is transported without packaging and without using a pallet, e.g. to carry it up or down stairs, its outer casing may be damaged. To transport the appliance without packaging, first remove the front panel of the appliance. See chapter “Installation / Removing the front panel”.
! Material losses Never use the air connections as handles for carrying the appliance.

700
D0000085683

1486 1340
D0000085684

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INSTALLATION Installation

10. Installation

10.1 Removing the front panel
Remove the front panel before removing the appliance from the pallet, to avoid damaging the casing.

f On the appliance, pull out the plug connecting the programming unit with the appliance.
10.2 Mounting the appliance
! Material losses If the unit is not mounted horizontally, condensate cannot drain properly. Condensate escaping in an uncontrolled manner can damage the floor or items in the vicinity of the unit.

! Material losses f Check whether the wall can bear the weight of the appliance. f Use appropriate rawl plugs and screws suitable for the wall structure to attach the rail.
f Remove the wall mounting bracket from the appliance.

ENGLISH

D0000040363

1 Fascia 2 Front panel fixing screws
The fascia is fastened to the appliance with locking tabs. f To disengage the locking tabs, press the grip areas on the
fascia sides. f Remove the fascia from the appliance. f Undo both screws securing the front panel at the top of the
appliance. f Carefully push the front panel upwards by a small amount to
release it from the hooks on which it is engaged.

f Secure the wall mounting bracket to the wall with four screws. The text “TOP” must be at the top. The wall mounting bracket must be horizontal.
f If necessary, screw the star grips included in the standard delivery into the back of the appliance at the bottom to act as spacers.
f Fit the appliance onto the hooks of the wall mounting bracket.
f If the appliance is not hanging horizontally, screw the previously fitted star grips acting as spacers in or out by a small amount.

D0000040851

D0000040364

1 Plug on cable from programming unit to appliance f Carefully raise the front panel by a small amount on the
right-hand side.

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INSTALLATION Installation

D0000058969

10.3 Connecting the condensate drain hose

! Material losses To ensure that condensate drains correctly, always lay the condensate drain hose without any kinks. Lay the condensate drain hose with a fall of at least 10 %. The appliance must be installed horizontally. The drain pipe may only contain one siphon. The condensate must be able to drain freely downstream of the siphon. The condensate must drain away via the domestic sewer system. The pipes must not rise in the domestic sewer system downstream of the siphon. The condensate drain must be free from the risk of frost.
! Material losses A float switch prevents condensate from reaching live parts in the unit. If the condensate drain hose is installed incorrectly, the float switch cannot prevent the uncontrolled leakage of condensate.
Note To ensure the unit is airtight, there may be no interruption in the condensate drain between the unit and the trap. Use the supplied condensate drain hose and mounting bend.
The standard delivery includes a condensate drain hose and a hose clip. Connect the thinner end of the condensate drain hose to the appliance.

1 Hose clip f Slide the hose clip onto the condensate drain hose far
enough to be able to push the hose onto the condensate drain connector without squeezing the hose clip. f Push the condensate drain hose onto the condensate drain connector. f Push the hose clip towards the appliance so that it secures the hose on the condensate drain connector.
10.4 Air ducts
! Material losses Never link cooker hoods to the ventilation system.
! 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.

Install the air ducts using materials that can be obtained from us or with commercially available folded spiral-seam tubes.
10.4.1 Insulation against condensation

! Material losses When warm air meets cold surfaces, condensation can result. f For outdoor air and exhaust air ducts, use vapour proof thermally insulated pipes. f If the supply and extract air ducts are routed through unheated rooms, insulate these ducts as well.

80
D0000058970

f Use the mounting bend included in the standard delivery to install the condensate drain hose in such a way as to create a siphon with a water trap height of at least 80 mm.
f Before connecting the condensate drain hose to the appliance, pour water into the siphon.

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D0000062521
ENGLISH

INSTALLATION Installation

10.4.2 Connecting air ducts to the appliance You can connect air ducts with two different diameters to the appliance.
Diameter DN 160

f Use no more than 3 screws to secure the air duct to the air connection of the appliance.
1

1
1 Twin nipple 2 Air duct f Push one of the twin nipples included in the standard deliv-
ery into the air connection. f Push the air duct onto the twin nipple.
1
3x 3x
1 Self-tapping screw f Use no more than 3 screws to secure the twin nipple to the
air connection of the appliance. f Secure the air duct to the twin nipple with no more than 3
screws. Diameter DN 180
f Push the air duct over the air connector.
1
3x

D0000062519

D0000062518

D0000062517

1 Aluminium sealing tape f Seal the transition from the air connection to the air duct
with aluminium sealing tape.
10.4.3 External wall outlets
Install the outdoor air intake into the building at a location where contamination (dust, soot, odours, flue gas, microorganisms, ash, exhaust air) is as low as possible.
When installing external wall outlets, prevent any short circuit between the air intake and the air discharge.
10.4.4 Silencers f Install a silencer in both the supply air duct and the extract
air duct. Install these silencers as close as possible to the appliance, so that noise is suppressed at an early stage.
We recommend installing additional silencers if required to avoid sound transmission.
If a room with a high noise level needs to be ventilated, install additional silencers upstream of this room to reduce sound transmission to the neighbouring rooms.
Aspects such as carried voices and impact sound must also be taken into consideration in the case of ducts embedded in concrete. Carried voices should be avoided by designing the duct with separate branches to the vents. If necessary, insulate the supply air ducts, e.g. if they are mounted outside the insulated wall panel.
10.4.5 Overflow apertures
Living rooms and bedrooms are only supplied with air. Air is only extracted from rooms where odours and moisture are generated. Ensure an unimpeded overflow and consequently air balancing. Install ventilation grilles in internal doors or walls, or enlarge the air gap beneath the door to 8 mm.
10.4.6 Cleaning apertures f Fit cleaning apertures when installing the air ducts, so
that the air ducts can be inspected and cleaned at regular intervals.
10.4.7 Supply and extract air vents
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.

D0000062520

1 Self-tapping screw www.stiebel-eltron.com

LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie | 49

INSTALLATION Commissioning

10.5 Fitting the front panel
f Push the plug on the cable leading to the programming unit into the appliance.
f Hook the front panel into the hooks provided at the front of the appliance.
f At the upper edge of the front panel, screw in the two screws for securing the front panel to the appliance.
f Fit the fascia.
10.6 Electrical connection
WARNING Electrocution Carry out all electrical connection and installation work in accordance with national and regional regulations.
10.6.1 Safety equipment for stove/fireplace operation f Install the safety equipment in such a way that it interrupts
the appliance power supply when required. 10.6.2 Connections in the control panel (safety extra low
voltage)
f Undo the four screws from the control panel cover. Note After completing your work, screw the cover back onto the control panel.

D0000065179

f Carefully lift up the control panel cover. The terminal block, from which cables lead into the appliance, is suspended from the underside of the cover.

Terminal

I²C bus

Not assigned

Intensive ventilation switch-

ing contact

Not assigned

Safety extra low voltage SCL External programming unit SCL GND External programming unit GND
+5 V DC External programming unit +5 V DC
SDA External programming unit SDA
floating
GND 0.5 mA max.
+5 V floating
floating

To connect an electrical cable in the control panel: f Open an “entry for electrical cables” at the knock-out. f Use an M12 cable fitting to seal the “entry for electrical
cables”.
Intensive ventilation switching contact
You can connect a floating switching contact, the actuation of which switches the appliance to intensive ventilation. You can set the runtime for intensive ventilation in the “Intens. vent. time” parameter. After this time has expired, the unit switches back to the previously selected fan setting. f Connect the external pushbutton to terminals 13/14.
External programming unit
The programming unit is connected with an I²C bus.
10.6.3 Connection to a standard socket
The appliance is delivered fully wired. f Take the power consumption of the preheating coil into
consideration. f Plug the appliance into a standard socket.

11. Commissioning

WARNING Injury If the unit is switched on without the air ducts connected

and someone reaches through the air connectors into the

unit, there is a risk of injury.

Do not commission the unit until the air ducts are firmly

connected to it.

! Material losses Never operate the unit without filters.

D0000065180

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INSTALLATION Settings

ENGLISH

! 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.
Note Observe the operating instructions. It explains which parameters can also be set by the appliance user.
11.1 Initial start-up
Settings
View When you enter a four-digit code, additional actual values and parameters become visible, which were previously hidden from the appliance user. f To access actual values and parameters which are reserved
for qualified contractors, enter the code “1 0 0 0” for “View”. Press “OK”. “Service” is shown on the display, when this is entered correctly.
Note After entering the code, switch to the menu by pressing the “MENU” button. If you first switch to the home screen, the parameter block is reactivated.

f Check whether the condensate drain hose is damaged or kinked.
12. Settings
Note Observe the operating instructions. It explains which parameters can also be set by the appliance user.

12.1 Menus

Note Some parameters are protected by a code. The factory programmed code for qualified contractors is “1 0 0 0”.

Note The parameters shown in grey can only be adjusted by the service department.

f Press the “MENU” button to access the menus from the home screen.

Menu Info Diagnostics Programs Settings

Description Information about the actual values of the unit Fault messages, operating time, maintenance intervals Fan program Adjustable values and functions

General
Time/date
Day f Set the current day of the week (Monday to Sunday).
Hour:Minute f Set the current time (00:00 to 23:59).
Language f Set the required language.
Air flow rate f Select the air flow rate for the fan settings under “Air flow
rate” with “Flow rate, stage 0” to “Flow rate, stage 3”.
Enable fan The fans are deactivated in the delivered condition. f Set the “Enable fan” parameter to “On”.
11.2 Recommissioning
f Check whether filters are fitted in the unit. Never operate the unit without filters.

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INSTALLATION Settings

12.1.1 “Info” menu
Info Bypass status Extract air temp. Extract air hum. Extract air dew pt Outdoor air temp. Outdoor air hum. Outdoor air dew pt Supply air temp. Exhaust air temp. Supply air fan control Supply air fan speed Supply air flow rate Exhaust air fan control Exhaust air fan speed Exhaust air flow rate Heating coil control Extract air diff. press.
12.1.2 “Diagnostics” menu
Diagnostics Notification list Clear notification list Filter runtime Filter reset Filter change interval Device operating time Fan operating time

Value Off | On °C % °C °C % °C °C °C % rpm m³/h % rpm m³/h % Pa
Value
Off | On h Off | On d d d

Diagnostics

Clear notification list
To clear the notification list, set this parameter to “On”. Press “OK” to confirm. Afterwards, “Off” is displayed again and the fault messages are deleted.

12.1.3 “Programs” menu
Programs Fan program

Value
Monday Tuesday Wednesday Thursday Friday Saturday Sunday Monday – Friday Saturday – Sunday Monday – Sunday

12.1.4 “Settings” menu
Settings View
General Time/date

Value Code for qualified contractor
Day Hour:Minute

Language

German

English

Francais

Nederlands

Italiano

Polski

Cesky

Magyar

Slovensko

Slovensky

Contrast

1 – 10

Brightness

Touch sensitivity

1 – 10

Touch boost

Prog. unit software

Fan control

Constant flow rate

Constant pressure

Air flow rate

Flow rate, stage 0

m³/h

Flow rate, stage 1

m³/h

Flow rate, stage 2

m³/h

Flow rate, stage 3

m³/h

Supply air flow rate offset

m³/h

Extract air diff. press.

Diff. pressure, stage 0

Diff. pressure, stage 1

Diff. pressure, stage 2

Diff. pressure, stage 3

Favourites

F1, F2, F3

Bypass status

Extract air temp.

Extract air hum.

Filter runtime

Device software version

Device software patch

Term. device serial no.

Humidity prot.

Only for qualified con-

tractors

Enable humidity control (A2)

Off

Humidity prot. interval

Humidity threshold

Humidity capture delay

min

Intensive ventilation

Intens. vent. time

min

Heat recovery bypass

Set room temperature

°C

Operating mode heat recovery bypass

Disabled

Bypass/window contact

Outdoor air routing au-

tomatic

Extract air routing autom.

Temperature to enable heat recovery by- °C

pass

Temperature to block heat recovery bypass °C

Hysteresis for heat recovery bypass

Temp. differential for heat recovery bypass K

Window contact mode (A2)

Without window contact

(depending on unit)

With window contact

Cooling/heating, heat recovery bypass

Cooling/heating

Cooling

Heating

Frost protection

Only for qualified con-

tractors

Frost protection temp.

°C

Temp. to enable frost protection (A2)

°C

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ENGLISH

INSTALLATION Settings

Enable preheating Frost protection mode
Condensate prevention (A2) Enable condensate prevention Offset condensate prevention Enable fan Ventilation unit Device software version Device software patch Term. device serial no. Device type
Settings
View

Off On Outdoor air reg. Supply air reg. Passive house reg.
Off On K Off On

Air flow rate

Supply air flow rate offset
Use this parameter to adjust the supply air flow rate during commissioning. The offset refers to standard ventilation and is converted internally as a percentage for the other fan stages.

Example
Nominal flow rate (stage 2) Offset

m³/h

180

m³/h

Stage Set flow Off- Set flow Offset fac- internal set flow

rate set rate + off- tor

rate = set flow

set

rate * offset fac-

tor

50*1.25 = 62

130

130*1.25 = 162

180 45 180+45 = 225 225/180 = 1.25 180*1.25 = 225

235

235*1.25 = 294

Standard (A0)
Service (A1) Expert (A2)

The only parameters displayed are those that have been released for the appliance user and can therefore be accessed without a code.
Parameters for qualified contractors: Code “1 0 0 0”
Parameters for service department.

f To access actual values and parameters which are reserved for qualified contractors, enter the code “1 0 0 0” for “View”. Press “OK”.
“Service” is shown on the display, when this is entered correctly.
If you switch to the actual values or parameters, you see the enabled parameters.

Note After entering the code, switch to the menu by pressing the “MENU” button. If you first switch to the home screen, the parameter block is reactivated.

Fan control
Use this parameter to switch fan control between “Constant flow rate” and “Constant pressure”.

Constant flow rate
Constant pressure

Effect
The appliance maintains a constant flow rate for both fans. The unit works with the set values set for “Flow rate, stage 0” to “Flow rate, stage 3”.
The appliance maintains a constant pressure at the extract air fan. The unit regulates the pressure at the extract air connection to the set values set for “Diff. pressure, stage 0” to “Diff. pressure, stage 3”. The flow rate that is established there is used as the set value for flow rate control of the supply air fan. “Supply air flow rate offset” is also included.

Humidity prot.

Enable humidity control
With humidity-dependent flow rate control, the air flow rate is increased or decreased depending on the humidity level.

Parameter Off On

Effect inactive active

Humidity prot. interval
If you set fan stage 0, the appliance switches to a 24 hour dormant phase. Only after this will humidity protection control start.
The unit measures the humidity of the extract air for the time set for “Humidity capture delay”. The unit compares the last measured value with the limit value set for “Humidity threshold”. If the humidity threshold is exceeded, the unit starts to ventilate. If the humidity threshold is undershot again, the unit terminates ventilation. At this point, the Humidity prot. intervalstarts again, at the end of which the moisture is measured.
Humidity capture delay
The unit measures the humidity of the extract air for the time set for “Humidity capture delay”. The unit compares the last measured value with the limit value set for “Humidity threshold”.

Note If you change over the “Fan control” setting, the unit restarts.

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INSTALLATION Settings

Heat recovery bypass

Window contact mode (depending on unit)
Setting whether the window contact is relevant for the bypass mode.

Parameter
Without window contact
With window contact

Effect
The supply air fan is stopped independently of the window contact.
The window contact is used to determine whether the appliance stops the supply air fan.

Frost protection mode

Parameter Effect

Outdoor air reg. At this setting, the appliance operates solely in frost protection mode. The preheating coil control only measures the outside temperature.

Supply air reg. At this setting, the appliance operates in comfort mode. In addition to the outside temperature, the supply air temperature is also measured.

Passive house reg.

The preheating coil is controlled to ensure that the supply air temperature does not fall below the 16.5 °C specified in the passive house criteria.

Temperature to enable heat recovery bypass To enable checking of the other parameters for bypass mode, the outdoor air temperature must be no less than the value set in this parameter.
Temperature to block heat recovery bypass If the outdoor air temperature falls below this blocking temperature, bypass mode is disabled.
Hysteresis for heat recovery bypass To make cooling possible, the outdoor air temperature must be cooler than the extract air temperature by the value set in this parameter.
Temp. differential for heat recovery bypass Use this parameter to define the temperature differential that must be exceeded for bypass mode to be enabled. For bypass mode to be enabled, the following condition must be met for 60 minutes: If Operating mode heat recovery bypass: Outdoor air routing automatic – Set room temperature + Temp. differential for heat recovery
bypass < Outdoor air temp. If Operating mode heat recovery bypass: Extract air routing autom. – Set room temperature + Temp. differential for heat recovery
bypass < Extract air temp.
Frost protection

Condensate prevention

Enable condensate prevention

The Condensate prevention function is intended for units without an enthalpy heat exchanger in areas with a subtropical climate.

If the unit is in ventilation mode, and this parameter has the value “On”, the unit checks the following conditions:
– Outdoor air temp. > Extract air temp.
– Extract air temp. + Offset condensate prevention < Outdoor air dew point

If both conditions are met, the unit switches the fans off. After a shutdown, the unit switches on the fans cyclically and checks whether the conditions are still valid or whether ventilation mode can be resumed.

Interval between measurements Duration of measurement

min 60

min

Offset condensate prevention This parameter changes the shutdown point for Condensate prevention. This allows the fans to be switched off 2 K before the dew point temperature is reached, for example.
Ventilation unit
Device type This parameter is set at the factory. The parameter can only be set after the controller assembly has been replaced.

Temperature for enabling frost protection
The unit only activates frost protection if the outdoor air temperature drops to the value that can be set in this parameter.

Enable preheating

Parameter Off On

Effect
The internal preheater is completely deactivated.
The internal preheater is activated. To keep the heat exchanger free from ice, preheating ensures a minimum supply air temperature with reference to the temperature, which can be set in the “Frost protection temp.” parameter.

While this parameter is being displayed or adjusted, the “frost protection” symbol is shown on the display.

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ENGLISH

INSTALLATION Settings

12.2 Direct selection parameters

LWZ 180, LWZ 180 Enthalpie

LWZ 280, LWZ 280 Enthalpie

Description

Code Unit Min. Max. Options level

Stand- Min. Max. Options ard

Standard

P1 Set room temperature

A0 °C 5 28

5 28

P2 Intens. vent. time

A0 min. 1 240

1 240

P3 Operating mode heat recovery A0 bypass

Disabled (0) | Bypass/window contact (1) | Outdoor air routing automatic (2) | (2) Extract air routing autom. (3)

P4 Filter reset

Off | On

Off

Off | On

Off

P5 Fan control

Constant flow rate (0) |

(0)

Constant pressure (1)

Constant flow rate (0) |

(0)

Constant pressure (1)

P6 Flow rate, stage 0

A1 m³/h 40 175

40 175

P7 Flow rate, stage 1

A1 m³/h 60 200

110 60 300

140

P8 Flow rate, stage 2

A1 m³/h 60 250

160 60 350

200

P9 Flow rate, stage 3

A1 m³/h 60 250

210 60 350

260

P10 Diff. pressure, stage 0

A1 Pa 40 160

40 160

P11 Diff. pressure, stage 1

A1 Pa 40 160

40 160

P12 Diff. pressure, stage 2

A1 Pa 40 160

40 160

P13 Diff. pressure, stage 3

A1 Pa 40 160

100 40 160

100

P14 Supply air flow rate offset A1 m³/h -100 100

-100 100

P15 Humidity prot. interval

A1 h 1 24

1 24

P16 Humidity capture delay

A1 min 5 15

5 15

P17 Humidity threshold

A1 % 5 95

5 95

P18 Frost protection temp.

A1 °C -10.0 10.0

-0.5 -10.0 10.0

-0.5

P19 Filter change interval

A1 d 1 365

1 365

P22 Enable preheating

Off | On

P23 Frost protection mode

Outdoor air reg. (0) |

Supply air reg. (1) |

Passive house reg. (2)

(2)

Outdoor air reg. (0) |

Supply air reg. (1) |

Passive house reg. (2)

(2)

P24 Temperature to enable heat A1 °C 5.0 15.0

10.0 5.0 15.0

10.0

recovery bypass

P25 Temperature to block heat re- A1 °C 5.0 15.0

8.0 5.0 15.0

8.0

covery bypass

P26 Hysteresis for heat recovery A1 K 0.0 5.0

2.0 0.0 5.0

2.0

bypass

P27 Temp. differential for heat re- A1 K 0.0 5.0

2.0 0.0 5.0

2.0

covery bypass

P28 Enable fan

Off | On

Off

Off | On

Off

P29 Device type

P30 Temperature for enabling frost A2 °C -10.0 10.0

-3.0 -10.0 10.0

-3.0

protection

P31 Enable humidity control

Off | On

Off

Off | On

Off

P32 Enable condensate prevention A2

Off | On

Off

Off | On

Off

P33 Offset condensate prevention A2 K -5.0 5.0

0.0 -5.0 5.0

0.0

P34 Window contact mode (de- A2 pending on unit)

without window contact | with window contact

P35 Cooling/heating, heat recovery A0 bypass

Cooling/heating (1) |

(1)

Cooling (2) |

Heating (3)

Cooling/heating (1) |

(1)

Cooling (2) |

Heating (3)

P70 Clear notification list

Off | On

Off

Off | On

Off

P80 Day

P81 Time

00:00 23:59

Note If the option “Constant flow rate” is set in “Fan control”, a parameter “Flow rate, stage 0” to “Flow rate, stage 3” is displayed. If the option “Constant pressure” is set in “Fan control”, a parameter “Diff. pressure, stage 0” to “Diff. pressure, stage 3” is displayed.

Note The parameters shown in grey can only be adjusted by the service department.

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D0000082556

INSTALLATION Shutting down the system

13. Shutting down the system
We recommend running the appliance in fan stage 1, even during prolonged absence.

! Material losses If you interrupt the power supply to the appliance, check that humidity protection is ensured for the building.
If the appliance needs to be taken out of use for an extended period, disconnect it from the power supply by pulling the mains plug. f Replace the filters.
14. Maintenance
WARNING Electrocution Disconnect the appliance from the power supply before carrying out work inside the appliance. f Pull the mains plug out of the socket.

1
1 Wing screw f To remove the heat exchanger from the appliance, undo the
wing screw, which pushes the support bar against the heat exchanger from below.

Maintenance by the qualified contractor includes cleaning the cross-countercurrent heat exchanger and the fans. Subject to runtime, this maintenance work should be carried out every 3 years. f Disconnect the power supply by pulling the power plug from
its socket. f Remove the front panel (see chapter “Installation / Removing
the front panel”). f Remove the filter drawer from the appliance.

f Carefully remove the heat exchanger from the unit. Avoid damaging the gaskets in the appliance.
f Use a commercially available vacuum cleaner to remove dust and other loose dirt particles from the intake and discharge surfaces.

D0000040365

26_04_15_0047

D0000065159

f Undo the screws on the inner front panel. f Remove the inner front panel from the appliance by tilting
the inner front panel forwards and then lifting it out of the bottom slots.

f If required, clean the heat exchanger with warm water (max. 55 °C) and a commercially available detergent. Do not use solvents.
f Flush the heat exchanger with water.
Cleaning the fan units
Each fan unit has a rotating eccentric bolt at the bottom. To ensure that the seals fit correctly on the fan unit, the eccentric bolt raises the fan unit while pushing it towards the back. Before pulling out the fan unit, you must release the eccentric bolt. Retighten the eccentric bolt after installing the fan unit.

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INSTALLATION Maintenance

ENGLISH

300°

D0000063652

1 Eccentric bolt tightened (slot horizontal) 2 Eccentric bolt released f Use a medium sized screwdriver to turn the eccentric bolt
anti-clockwise by 300°. f Carefully pull both fan units from the appliance by a small
amount.
1 2
4 3
1 Temperature sensor connection 2 Pressure sensor connection 3 Connection for the fan power cable 4 Connection for the fan control cable f At the front of the supply air fan, disconnect the 3-core power
cable and the 4-core control cable. f Disconnect the 6-core common cable for the pressure sensor
and temperature sensor. Four cores of the cable are connected to the pressure sensor connection. Two cores of the cable are connected to the temperature sensor connection. f Remove the supply air fan from the appliance.

D0000040366

1
2
1 Connection for the fan control cable 2 Connection for the fan power cable f At the front of the exhaust air fan, disconnect the 3-core
power cable and the 4-core control cable. f At the back of the exhaust air fan, disconnect the 6-core com-
mon cable for the pressure sensor and temperature sensor. Four cores of the cable are connected to the pressure sensor connection. Two cores of the cable are connected to the temperature sensor connection. f Remove the exhaust air fan from the appliance. f Clean the fans with a soft brush.
Refitting the components f Push the fan units back into the appliance. f Turn the eccentric bolts under the fan units clockwise by
300°. The slot at the front of the eccentric bolts must be horizontal. f Reconnect the fan cables. f Slide the heat exchanger back into the appliance. f To ensure that the support bar pushes the partition under the heat exchanger, tighten the wing screw until finger-tight. The top three gaskets must be in contact with the heat exchanger and become slightly deformed. f Fit the inner front panel which ensures the appliance is airtight. Secure the inner front panel with seven screws. f Hook the front panel into the hooks provided at the front of the appliance. f Secure the front panel with the screws at the top. f Push the filter drawer into the appliance. The clean side of the filters must face down. f Hook the fascia into the appliance.

D0000065184

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LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie | 57

INSTALLATION Troubleshooting

Checking the condensate drain
Note The appliance will only function correctly if the condensate drain is working and is filled. f Check the condensate drain at regular intervals at
least once every six months.

Cleaning the air ducts
Air ducts must be checked at regular intervals and cleaned if necessary. Disconnect the air ducts from the appliance or carry out inspection and cleaning through the extract air and supply air vents.
15. Troubleshooting
WARNING Electrocution Disconnect the appliance from the power supply before carrying out work inside the appliance. f Pull the mains plug out of the socket.
WARNING Electrocution The power cable must only be replaced (for example if damaged) by a qualified contractor authorised by the manufacturer, using an original spare part.

Fault (Exxx)

xxx Fault

Effect

Remedy

— No fault present

1 Short cir- No control to the comfort Isolate the appliance from the cuit, supply temperature required for power supply. Check the sensor air tempera- passive houses of at least cable. Unplug connector X7 from ture sensor 16.5 °C in the supply air the electronic assembly. Test the sensor.

2 Cable break, No control to the comfort Isolate the appliance from the

supply air temperature required for power supply. Check the sensor

temperature passive houses of at least cable. Unplug connector X7 from

sensor

16.5 °C in the supply air the electronic assembly. Test the

sensor.

3 Short

No effect

circuit,

exhaust air

temperature

sensor

Isolate the appliance from the power supply. Check the sensor cable. Unplug connector X8 from the electronic assembly. Test the sensor.

4 Cable break, No effect exhaust air temperature sensor

Isolate the appliance from the power supply. Check the sensor cable. Unplug connector X8 from the electronic assembly. Test the sensor.

5 No differen- To avoid build-up of

Isolate the appliance from the

tial pressure negative pressure in the power supply. Check the sensor

supply air rooms, the appliance cable. Check the pressure hoses

sensor

switches off both fans. for contamination and damage. If

necessary, replace the sensor and

the hose.

6 No differen- The unit switches off Isolate the appliance from the

tial pressure the exhaust air fan. The power supply. Check the sensor

exhaust supply air fan remains in cable. Check the pressure hoses

air sensor operation.

for contamination and damage. If

necessary, replace the sensor and

the hose.

xxx Fault

Effect

Remedy

7 No differen- Constant pressure control Isolate the appliance from the

tial pressure is not possible. The appli- power supply. Check the sensor

extract air ance switches to flow rate cable. Check the pressure hoses

sensor

control.

for contamination and damage. If

necessary, replace the sensor and

the hose. Check the setting of the

“Fan control”.

8 No humidity The unit cannot provide Isolate the appliance from the

value for the humidity protection. power supply. Check the sensor

extract air

cable. Replace the sensor.

9 No humidity The unit cannot provide Isolate the appliance from the

value for the humidity protection. power supply. Check the sensor

outdoor air

cable. Replace the sensor.

10 No temper- Automatic bypass mode Isolate the appliance from the ature value is not possible. Manual power supply. Check the sensor for the ex- changeover of the bypass cable. tract air damper with the options “Disabled” and “Bypass/ window contact” for “Operating mode heat recovery bypass” parameter is possible.

11 No temper- Automatic bypass mode Isolate the appliance from the ature value is not possible. Manual power supply. Check the sensor for the out- changeover of the bypass cable. door air damper with the options “Disabled” and “Bypass/ window contact” for “Operating mode heat recovery bypass” parameter is possible.

16 The conden- The unit switches off the Check the condensate drain.

sate float fans.

Check the cable for breakages.

switch has

responded.

101 Supply air fan

The unit does not receive Isolate the appliance from the

any speed feedback from power supply. Check the cabling.

the fan. There is no effect Check the PWM control signal

on the flow rate control that the electronic assembly

mode.

sends to the fan. Check the speed

signal that the fan sends to the

electronic assembly. Replace

the fan.

102 Exhaust air The unit does not receive Isolate the appliance from the

fan

any speed feedback from power supply. Check the cabling.

the fan. There is no effect Check the PWM control signal

on the flow rate control that the electronic assembly

mode.

sends to the fan. Check the speed

signal that the fan sends to the

electronic assembly. Replace

the fan.

201 No RTC Time-dependent program Isolate the appliance from the

communi- sequences are disrupted. power supply. Replace the elec-

cation (RTC

tronic assembly.

= real-time

clock)

202 No RTC pulse

Time-dependent program Isolate the appliance from the sequences are disrupted. power supply. Replace the elec-
tronic assembly.

203 Sensor volt- The unit controls the fans Isolate the appliance from the age too low with the maximum value power supply. Check the sensor of the currently selected voltage after disconnecting one fan stage. The unit cannot of the following sensor plugs: provide humidity protec- X15, X16, X23, X24. Replace the tion. Automatic bypass sensor. Replace the electronic mode is not possible. assembly. Manual changeover of the bypass damper with the options “Disabled” and “Bypass/window contact” for “Operating mode heat recovery bypass” parameter is possible.

204 Supply air If the supply air temper- Check the preheating coil. shutdown ature drops below 5 °C, the fan is switched off.

58 | LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie

www.stiebel-eltron.com

ENGLISH

INSTALLATION Disposal

xxx Fault

Effect

Remedy

205 Maximum The high limit safety cut- Isolate the appliance from the

outdoor air out may respond.

power supply. Check the triac

temperature

for continuity. Check the sensor

exceeded

cable.

— Program- Parameters cannot be I2C-connection faulty: Check cable

ming unit adjusted.

and plug-in connections. Replace

does not

damaged cable.

start.

Sensor resistance values

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.

Supply air Exhaust air
Temperature [°C] -30 -20 -10 0 10 20 25 30 40 50 60 70 80 90 100 110 120

Sensor type PT 1000 PT 1000
PT 1000 Resistance []
882 922 961 1000 1039 1078 1097 1117 1155 1194 1232 1271 1309 1347 1385 1423 1461

16. Disposal
Dismantling
WARNING Electrocution Disconnect the appliance from the power supply.
The following tools are required for disassembly and material separation prior to disposal: – Personal protective equipment – Set of screwdrivers – Set of spanners – Combi pliers – Stanley knife

www.stiebel-eltron.com

LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie | 59

INSTALLATION Specification
17. Specification
17.1 Dimensions and connections
690

534

66 i13

53 997

577 791

d45

265

105

183 343

g05 g06
105

g04 g03
b01
265

b01 Entry electrical cables d45 Condensate drain g03 Outdoor air g04 Exhaust air g05 Extract air g06 Supply air i13 Wall mounting bracket

Diameter mm Diameter mm Diameter mm Diameter mm Diameter mm

17.2 Wiring diagram
X1 Power supply X2 Heating coil X3 Supply air fan power cable X4 Exhaust air fan power cable X6 float switch X7 Supply air temperature sensor X8 Exhaust air temperature sensor X11 I²C bus at terminal block X12 Internal programming unit X13 External programming unit X15 Outdoor air humidity sensor X16 Extract air humidity sensor X17 Bypass damper motor

LWZ 180
22 160 / 180 160 / 180 160 / 180 160 / 180

LWZ 280 LWZ 180 Enthalpie LWZ 280 Enthalpie

22 160 / 180 160 / 180 160 / 180 160 / 180

X19 No function X20 Intensive ventilation switching contact X21 Exhaust air fan control cable X22 Supply air fan control cable X23 Exhaust air pressure sensor X24 Supply air pressure sensor SA Supply air EA Exhaust air OA Outdoor air RA Extract air Choke Restrictor

D0000040353

60 | LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie

www.stiebel-eltron.com

INSTALLATION Specification

E1 1500 W
F1

ENGLISH

bn bl
Choke bn

1 11

L N PE

bn
X3

bn
X4
bl

X22 X21

X24

X23

X20

X10

X19

X11

X18

X12 X13 X14 X15 X16 X17

111

D0000102754

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LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie | 61

INSTALLATION Specification

17.3 Fan diagram
The graph shows the pressure drop for examples of air distribution systems.
LWZ 180 / LWZ 180 Enthalpie
200

175

150
0,57

125
0,45

100

0,40

0,34

0,36

75
0,29 0,25

0,23
50

0,17

0,18

25
0 0

0,11

0,13

0,09

0,20

0,06

0,16 0,12

0,03

0,05

0,07

0,09

100

125

150

175

200

225

250

275

X Air flow rate [m³/h]
Y Average value, static pressure [Pa] z Power consumption of both fans [Wh/m³]
Application range

LWZ 280 / LWZ 280 Enthalpie

225

D0000063739

200

175

0,49
150

0,40
125

100 75 50 25 0 0

0,42 0,40
0,36
0,26 0,30

0,19

0,24

0,32

0,24 0,16
0,20

0,10

0,12

0,17

0,04
, 0,02

0,06 0,04

0,11 0,08

100

125

150

175

200

225

250

275

300

325

350

X Air flow rate [m³/h]
Y Average value, static pressure [Pa] z Power consumption of both fans [Wh/m³]
Application range

D0000063739

62 | LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie

www.stiebel-eltron.com

ENGLISH

INSTALLATION | GUARANTEE | ENVIRONMENT AND RECYCLING Specification

17.4 Data table

LWZ 180

LWZ 280 LWZ 180 Enthalpie LWZ 280 Enthalpie

232361

232362

236646

236647

Sound emissions

Sound power level with standard ventilation and 50 Pa, external

dB(A)

47.7

Sound power level at max. flow rate and 100 Pa

dB(A)

Sound power level Lwa

dB(A)

47.7

Energy data

Energy efficiency class

Energy efficiency class in moderate climates, manual control

Electrical data

Rated voltage

230

Max. power consumption

9.00

Power consumption excl. preheating coil

0.60

0.80

0.60

0.8

Power consumption incl. preheating coil

7.10

7.30

7.10

7.3

Phases

1/N/PE

Frequency

Power consumption excl. preheating coil

115

105

Power consumption incl. preheating coil

1565

1615

1560

1605

Versions

IP rating

IP22

Filter class

ePM10 50 % (M5) | ePM10 50 % (M5) | ePM10 50 % (M5) | ePM10 50 % (M5) | ISO Coarse > 60 % (G4) ISO Coarse > 60 % (G4) ISO Coarse > 60 % (G4) ISO Coarse > 60 % (G4)

Dimensions

Height

997

Width

690

Depth

534

Weights

Weight

Connections

Air connection diameter

160

Condensate connection

22.00

Values

Max. air flow rate

m³/h

250

350

250

350

Air flow rate

m³/h

60-250

60-350

60-250

60-350

Heat recovery level up to

Application range, extract air

°C

1535

15-35

Max. ambient temperature

°C

Available external pressure, ventilation

160

Further details
Maximum height for installation Storage and transportation temperature

LWZ 180

LWZ 280 LWZ 180 Enthalpie LWZ 280 Enthalpie

232361

232362

236646

236647

2000

°C

-25 – 60

-25 – 50

Guarantee
The guarantee conditions of our German companies do not apply to appliances acquired outside of Germany. In countries where our subsidiaries sell our products a guarantee can only be issued by those subsidiaries. Such guarantee is only granted if the subsidiary has issued its own terms of guarantee. No other guarantee will be granted.
We shall not provide any guarantee for appliances acquired in countries where we have no subsidiary to sell our products. This will not affect warranties issued by any importers.

Environment and recycling
We would ask you to help protect the environment. After use, dispose of the various materials in accordance with national regulations.

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LWZ 180 | LWZ 280 | LWZ 180 Enthalpie | LWZ 280 Enthalpie | 63

Deutschland STIEBEL ELTRON GmbH & Co. KG Dr.-Stiebel-Straße 33 | 37603 Holzminden Tel. 05531 702-0 | Fax 05531 702-480 [email protected] www.stiebel-eltron.de

Verkauf

Tel. 05531 702-110 | Fax 05531 702-95108 | [email protected]

Kundendienst Tel. 05531 702-111 | Fax 05531 702-95890 | [email protected]

Ersatzteilverkauf www.stiebel-eltron.de/ersatzteile | [email protected]

Australia

Hungary

South Africa

STIEBEL ELTRON Australia Pty. Ltd.

STIEBEL ELTRON Kft.

STIEBEL ELTRON Southern Africa (PT Y) Ltd

294 Salmon Street | Port Melbourne VIC 3207 Gyár u. 2 | 2040 Budaörs

30 Archimedes Road

Tel. 03 9645-1833 | Fax 03 9644-5091

Tel. 01 250-6055 | Fax 01 368-8097

Wendywood

[email protected]

Johannesburg, 2090

www.stiebel-eltron.com.au

www.stiebel-eltron.hu

Tel. +27 10 001 85 47

Austria STIEBEL ELTRON Ges.m.b.H.

Japan NIHON STIEBEL Co. Ltd.

[email protected] www.stiebel-eltron.co.za

Gewerbegebiet Neubau-Nord

Kowa Kawasaki Nishiguchi Building 8F

Switzerland

Margaritenstraße 4 A | 4063 Hörsching

66-2 Horikawa-Cho

STIEBEL ELTRON AG

Tel. 07221 74600-0 | Fax 07221 74600-42

Saiwai-Ku | 212-0013 Kawasaki

Industrie West

[email protected]

Tel. 044 540-3200 | Fax 044 540-3210

Gass 8 | 5242 Lupfig

www.stiebel-eltron.at

[email protected]

Tel. 056 4640-500 | Fax 056 4640-501

Belgium STIEBEL ELTRON bvba/sprl

www.nihonstiebel.co.jp Netherlands

[email protected] www.stiebel-eltron.ch

‘t Hofveld 6 – D1 | 1702 Groot-Bijgaarden

STIEBEL ELTRON Nederland B.V.

Thailand

Tel. 02 42322-22 | Fax 02 42322-12

Daviottenweg 36 | 5222 BH ‘s-Hertogenbosch STIEBEL ELTRON Asia Ltd.

[email protected]

Tel. 073 623-0000 | Fax 073 623-1141

469 Moo 2 Tambol Klong-Jik

www.stiebel-eltron.be

[email protected]

Amphur Bangpa-In | 13160 Ayutthaya

China STIEBEL ELTRON (Tianjin) Electric Appliance Co., Ltd.

www.stiebel-eltron.nl
New Zealand Stiebel Eltron NZ Limited

Tel. 035 220088 | Fax 035 221188 [email protected] www.stiebeleltronasia.com

Plant C3, XEDA International Industry City

61 Barrys Point Road | Auckland 0622

United Kingdom and Ireland

Xiqing Economic Development Area

Tel. +64 9486 2221

STIEBEL ELTRON UK Ltd.

300385 Tianjin

[email protected]

Unit 12 Stadium Court

Tel. 022 8396 2077 | Fax 022 8396 2075

www.stiebel-eltron.co.nz

Stadium Road | CH62 3RP Bromborough

[email protected] www.stiebeleltron.cn
Czech Republic

Poland STIEBEL ELTRON Polska Sp. z O.O. ul. Dzialkowa 2 | 02-234 Warszawa

Tel. 0151 346-2300 | Fax 0151 334-2913 [email protected] www.stiebel-eltron.co.uk

STIEBEL ELTRON spol. s r.o.

Tel. 022 60920-30 | Fax 022 60920-29

United States of America

Dopravák 749/3 | 184 00 Praha 8

[email protected]

STIEBEL ELTRON, Inc.

Tel. 251116-111 | Fax 235512-122

www.stiebel-eltron.pl

17 West Street | 01088 West Hatfield MA

[email protected] www.stiebel-eltron.cz
Finland

Russia STIEBEL ELTRON LLC RUSSIA Urzhumskaya street 4,

Tel. 0413 247-3380 | Fax 0413 247-3369 [email protected] www.stiebel-eltron-usa.com

STIEBEL ELTRON OY

building 2 | 129343 Moscow

Kapinakuja 1 | 04600 Mäntsälä

Tel. +7 495 125 0 125

Tel. 020 720-9988

[email protected]

www.stiebel-eltron.ru

www.stiebel-eltron.fi

Slovakia

France

STIEBEL ELTRON Slovakia, s.r.o.

STIEBEL ELTRON SAS

Hlavná 1 | 058 01 Poprad

7-9, rue des Selliers

Tel. 052 7127-125 | Fax 052 7127-148

B.P 85107 | 57073 Metz-Cédex 3

[email protected]

Tel. 0387 7438-88 | Fax 0387 7468-26

www.stiebel-eltron.sk

[email protected]

4<AMHCMO=bd jfh> www.stiebel-eltron.fr

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 | Zastrzeone zmiany techniczne i

ewentualne bldy | Omyly a technické zmny jsou vyhrazeny! | A muszaki változtatások és tévedések jogát

fenntartjuk! | . . | Chyby a

technické zmeny sú vyhradené!

Stand 9734

A 313395-44135-9740

Contents hide

1 Documents / Resources

1.1 References

2 Related Posts