STIEBEL ELTRON LWZ 170 E plus, LWZ 370 plus Operation And Installation

OPERATION AND INSTALLATION

Central ventilation appliance with heat recovery

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CONTENTS | SPECIAL INFORMATION

SPECIAL INFORMATION

OPERATION

1. General information ��3

1.1 Safety instructions �� 3

1.2 Other symbols in this documentation �� 3

1.3 Standardised output data �� 3

1.4 Units of measurement �� 3

2. Safety �� 3

2.1 Intended use �� 3

2.2 General safety instructions �� 4

2.3 Test symbols �� 4

3. Appliance description ��4

4. Settings ��5

4.1 Remote control �� 5

4.2 User interface on the appliance�� 5

4.3 Switching the appliance on �� 5

4.4 Switching off the appliance �� 6

4.5 Standard mode �� 6

5. Maintenance, cleaning and care ��7

5.1 Replacement ﬁlter �� 7

5.2 Cleaning ﬁlters �� 7

6. Troubleshooting ��9

6.1 Fault analysis �� 9

6.2 Fault codes �� 9

INSTALLATION

7. Safety �� 10

7.1 General safety instructions �� 10

7.2 Instructions, standards and regulations �� 10

7.3 Operation of the appliance in buildings with combustion equipment �� 10

8. Appliance description �� 11

8.1 Standard delivery �� 11

8.2 Required accessories ��11

8.3 Further accessories�� 11

9. Preparations �� 11

9.1 Installation site �� 11

9.2 Transport �� 11

10. Installation �� 11

10.1 Mounting the appliance ��11

10.2 Connecting the condensate drain �� 12

10.3 Connecting air ducts �� 12

10.4 Power supply �� 13

11. Commissioning �� 17

11.1 Initial start-up �� 17

11.2 Shutdown �� 17

11.3 Recommissioning �� 17

12. Settings �� 17

12.1 Settings menu �� 17

12.2 Read-out menu ��21

12.3 Service menu �� 21

12.4 Restoring factory settings �� 22

13. Maintenance �� 23

14. Troubleshooting �� 25

15. Speciﬁcation �� 26

15.1 Dimensions and connections �� 26

15.2 Minimum clearances �� 26

15.3 Data table �� 26

15.4 Wiring diagram �� 27

15.5 Sound �� 27

15.6 Fan diagram ��28

GUARANTEE

ENVIRONMENT AND RECYCLING

SPECIAL INFORMATION

- The appliance may be used by children aged8 and up and persons with reduced physical, sensory or mental capabilities or a lack of experience and know-how, provided that they are supervised or they have been instructed on how to use the appliance safely and have understood the resulting risks. Children must never play with the appliance. Children must never clean the appliance or perform user maintenance unless they are supervised.

- The power cable must only be replaced (for example if damaged) by qualiﬁed contractors authorised by the manufacturer.

- Secure the appliance as described in chapter "Installation/ Installation".

OPERATION

General information

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OPERATION

1. General information

The chapters "Operation" and “Special Information” 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 the instructions to any new user where appropriate.

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.

 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 Meaning

DANGER Failure to observe this information will result in serious

injury or death.

WARNING Failure to observe this information may result in serious

injury or death.

CAUTION Failure to observe this information may result in non-seri-

ous or minor injury.

1.2 Other symbols in this documentation

Note

General information is identiﬁed by the adjacent symbol.

 Read these texts carefully.

Symbol Meaning

Material losses (appliance damage, consequential losses and environmental pollution)

Appliance disposal

 This symbol indicates that you have to do something. The ac-

tion you need to take is described step by step.

1.3 Standardised output data

Explanations to determine and interpret the speciﬁed standardised output data

1.3.1 Standard: EN 13141-7

The output data speciﬁcally mentioned in text, diagrams and technical datasheets has been determined in line with the test conditions described 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 described in the standard shown in the heading of this chapter, any deviations can have a considerable impact. Further 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.

1.4 Units of measurement

Note

All measurements are given in mm unless stated otherwise.

2. Safety

2.1 Intended use

The appliance is designed as a mechanical ventilation unit with centralised supply air and extract air routing.

This appliance is intended for domestic use. It can be used safely by untrained persons. The appliance can also be used in a non-domestic environment, e.g.in a small business, 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 instructions for any accessories used is also part of the correct use of this appliance.

!

OPERATION

Appliance description

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It is deemed inappropriate to:

- Use extract air loaded with grease, explosive gases, dust or adhesive aerosols

- Install the unit outdoors

- Connect cooker hoods and dryer exhausts to the ventilation system.

Never adjust the setting of supply and extract air valves inside the rooms. These have been set up by a qualiﬁed contractor during commissioning.

2.2 General safety instructions

!

WARNING Injury The appliance may be used by children aged 8 and up and persons with reduced physical, sensory or mental capabilities or a lack of experience and know-how, provided that they are supervised or they have been instructed on how to use the appliance safely and have understood the resulting risks. Children must never play with the appliance. Children must never clean the appliance or perform user maintenance unless they are supervised.

Note

Trouble-free operation of the appliance is only possible with a closed appliance cover.

2.3 Test symbols

See type plate on the appliance.

3. Appliance description

The appliance draws in outdoor air with a fan. A second fan draws in extract air from rooms in the home with odour or humidity loads (kitchen, bathroom and WC). Extract air and outdoor air are routed through separate ducts. Extract air and outdoor air are ﬁltered by separate ﬁlters.

Both air streams are routed through a cross-countercurrent heat exchanger. The extract air gives off heat, which is transferred to the outdoor air. This means that the extracted stale indoor air heats the fresh clean outdoor air, saving energy and routing fresh air into the interior.

The appliance has a ﬁlter service indicator, as well as an optional ﬁlter service indicator at the stage switch.

The appliance has a frost protection control unit, which ensures that the appliance works to optimum effect even at low outside temperatures. If required, the frost protection control unit switches on the integral preheater coil.

The appliance is fully wired when delivered and works fully automatically.

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

Fan stage

Humidity protection ventilation: This fan stage prevents mould formation using the factory-set air flow rate of 50m³/h. Alternatively, the contractor can set an air flow rate of 0m³/h when commissioning the appliance. In such a case, no humidity protection is provided.

Fan stage1 should be seen as background ventilation, to be selected when going away for example.

Fan stage2 is recommended for standard ventilation.

Fan stage3 is recommended as intensive ventilation, to temporarily increase the air flow rate for load peaks (e.g. as a party stage).

Bypass function

An automatic bypass damper is built into the appliance. The bypass damper enables the supply of fresh air, which is not heated by the heat exchanger. Cool, fresh air is required on summer nights in particular. In such cases, as much of the warm air in the home as possible is displaced by cooler fresh air.

The bypass damper opens and closes automatically when the following conditions are met.

Bypass damper position

Conditions

Open

The outside temperature is higher than 10°C and lower than the room temperature, and the room temperature is higher than the bypass temperature set in parameter 05.

Sealed unvented

The outside temperature is lower than 10°C. The outside temperature is at least 0.5°C higher than the

room temperature. The room temperature is lower than the bypass tem-

perature reduced by the bypass hysteresis. The bypass temperature is set in parameter 05. The bypass hysteresis is set in parameter 06.

When the bypass damper is opened, the extract air does not ﬂow through the cross-countercurrent heat exchanger, but is instead routed directly as exhaust air out of the building. This means there is no transfer of heat to the supply air.

Frost protection

The appliance has a frost protection control unit and an integral preheater coil to prevent the cross-countercurrent heat exchanger from freezing up.

Once the frost protection control unit has been enabled (-1.5°C), the preheater coil is only switched on when the heat exchanger begins to ice up, at an output that is inﬁnitely variable. The frost protection control unit detects icing-up of the heat exchanger when the pressure increases on the extract air side of the appliance. The supply and extract air fans continue to run with the same air ﬂow rates.

Only when the output of the preheater coil becomes insufﬁcient for de-icing does the control unit reduce the speed of the supply air fan variably until it stops.

OPERATION

Settings

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4. Settings

Note

User operations at the appliance are restricted to switching the appliance ON and OFF.

4.1 Remote control

Observe the operating and installation instructions for the relevant remote control (see chapter "Appliance description/ Required accessories" or "Appliance description / Other accessories").

4.2 User interface on the appliance

The appliance has a user interface with display. This enables air ﬂow rates to be variably adjusted or operating details to be checked.

.

26�04�15�0008

1 2 3 4 5 6

1 Service plug-in connection 2 Menu key 3 Minus key 4 LCD 5 Plus key 6 R key

With the four control keys (menu, plus, minus, R), you can call up and change settings.

When the mains power is switched on, all available symbols are displayed for two seconds. In addition, the backlighting is activated for 60seconds. If one of the control keys is pressed, the display is illuminated for 30 seconds.

If no keys are pressed and/or if no blocking fault occurs, standard mode is displayed.

When the menu key is pressed, you can use the plus or minus key to choose between three different sub-menus:

- Settings menu (SET)

- Read-out menu (READ)

- Service menu (SERV)

With the R key, you can exit any selected menu and return to standard mode.

To switch on the display backlight without changing anything in the menu, press the R key brieﬂy (less than 5 seconds).

Button Key function

Menu Open menu; open sub-menu; enable parameter for value change;

confirm value change

- Scroll; adjust value; switch appliance on or off from standard mode (press and hold down for 5 seconds)

+ Scroll; adjust value R One step back in the menu; reset adjusted value; filter reset (press

and hold down for 5 seconds); delete fault history

4.3 Switching the appliance on

 Plug the appliance into a standard socket.

26�04�15�0009

All display symbols are shown for two seconds.

26�04�15�0011

The software version is displayed for two seconds.

26�04�15�0029

The appliance then runs according to the stage switch setting. If no stage switch is connected, the appliance always runs in fan stage1.

26�04�15�0030

Switching on via software

If the appliance has been switched off via software, "OFF" is displayed.

26�04�15�0032

 Switch on the appliance by pressing the minusbutton for 5

seconds.

5 s

26�04�15�0031

OPERATION

Settings

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4.4 Switching off the appliance

Switching off via software

 Press and hold down the minus button for 5 seconds to

switch off the appliance.

The display shows "OFF".

5s

26�04�15�0048

Interrupting the power supply

26�04�15�0010

The display is now blank.

WARNING Electrocution Before working on the appliance, always isolate the appliance from the power supply by ﬁrst switching the appliance off via the software and then unplugging it from the mains.

4.5 Standard mode

In standard mode, the display shows up to four different pieces of information (operating modes and values) simultaneously.

26�04�15�0012

1 Indication of the fan stage, indication of connected

appliances 2 Indication of the air ﬂow rate 3 Message text, e.g. ﬁlter status text, triggering of external

switching contact, etc. 4 Fault symbol

4.5.1 Fan stage

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A fan symbol is displayed when the supply air fan and the extract air fan rotate. The fan symbol is not visible when the fans are at a standstill.

The number after the fan symbol indicates the fan stage.

Fan stage indicator

Description

The supply air and extract air fans generate an air flow rate of 50m³/h or stop. This depends on the setting of parameter

01. This fan stage cannot be enabled with a 3-stage switch. The supply air and extract air fans rotate according to

stage1 of the stage switch. The air flow rate depends on the parameter 02 setting.

The supply air and extract air fans rotate according to stage2 of the stage switch. The air flow rate depends on the parameter 03 setting.

The supply air and extract air fans rotate according to stage3 of the stage switch. The air flow rate depends on the parameter 04 setting.

This appliance has been connected using an eBUS or OpenTherm coupling. The supply air and extract air fans rotate according to the fan stage selected at the master appliance. If the appliance is connected in a cascade, the slave number of the appliance is displayed.

4.5.2 Indication of the air ﬂow rate

26�04�15�0014

The selected air ﬂow rate of the supply air and extract air fans is displayed.

If the air ﬂow rates of the supply air and extract air fans differ, e.g. when an external switching contact is used, the highest air ﬂow rate is always displayed.

When the appliance is switched off via software, the text "OFF" appears.

4.5.3 Message texts in standard mode

26�04�15�0049

At this point on the display, a message text may appear. The message text "FILTER" always takes priority over other message texts.

OPERATION

Maintenance, cleaning and care

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Message text Description

FILTER

If FILTER is displayed, the filter must be cleaned or replaced.

EWT

If EWT is displayed, the geothermal heat exchanger is enabled.

CN1 or CN2

If CN1 or CN2 is displayed, one of the external switching inputs is enabled.

V1 or V2

If V1 or V2 is displayed, one of the 0-10V inputs is enabled.

Only when connection X1 is used (eBUS or OpenTherm connection):

Message text Description

Slave 1, Slave 2, etc.

Master appliance:

Slave appliance:

With connected appliances, the message tex t indicates which appliance is the "Slave 1" to "Slave 9". The default display for fan operation is indicated on the master appliance.

5. Maintenance, cleaning and care

Maintenance by the user is limited to ﬁlter cleaning or replacement required at certain intervals.

5.1 Replacement ﬁlter

Product designation

Part number Description

FMSG4-10 232475 Coarse particle filter mat G4;

10 pce per packing unit

FMSF5-2 232476 Fine filter F5;

2pce per packing unit

FMSF7-2 23247 7 Fine filter F7;

2pce per packing unit

5.2 Cleaning ﬁlters

Filters must be cleaned when "FILTER" is displayed.

26�04�15�0050

Replace ﬁlters annually.

Never operate the appliance without ﬁlters.

Cleaning or replacing ﬁlters

 Press and hold down the minus button for 5 seconds to

switch off the appliance.

26�04�15�0037

1

2

1 Extract air ﬁlter 2 Supply air ﬁlter

 Open the ﬁlter door.

OPERATION

Maintenance, cleaning and care

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26�04�15�0039

 Extract the supply air and extract air ﬁlters. Make a note of

how the ﬁlters were ﬁtted.

26�04� 15�0015

 Clean the ﬁlters, e.g. with a vacuum cleaner.

26�04�15�0040

 Push the cleaned or new ﬁlter into the appliance.

26�04�15�0041

 Close the ﬁlter door.

> 5 s

26�04�15�0016

 Switch on the appliance by pressing the minusbutton for 5

seconds.

5s

1

2 3

26�04�15�0059

 After cleaning or replacing the ﬁlters, hold down the R key

for 5 seconds to reset the ﬁlter display.

To conﬁrm that the ﬁlters have been reset, the text "FILTER" will ﬂash brieﬂy. Even if the message "FILTER" has not yet been displayed, it is possible to reset the ﬁlter. The counter is then reset to zero.

Once the ﬁlter has been reset, the text "FILTER" disappears and standard mode is displayed again.

OPERATION

Troubleshooting

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6. Troubleshooting

6.1 Fault analysis

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If the appliance detects a fault, a ﬂashing fault symbol (spanner) is displayed, possibly together with a fault number.

The appliance differentiates between a fault, where the appliance continues to operate with limited functionality, and a blocking fault, where both fans are stopped.

In the event of a blocking fault, the settings and read-out menus are also switched off and access is restricted to the service menu.

The appliance remains in this fault condition until the problem has been resolved. The appliance then resets itself (auto reset) and standard mode is displayed again.

6.2 Fault codes

Non-blocking fault

26�04�15�0061

If the appliance detects a non-blocking fault code, it continues to operate with limited functionality. Non-blocking faults are displayed with the fault symbol (spanner).

Blocking fault

D0000036353

If the appliance detects a blocking fault code, it stops. The permanently illuminated display shows the fault symbol (spanner) together with a fault code.

 Notify a qualiﬁed contractor, who can correct the fault.

A blocking fault cannot be resolved by brieﬂy disconnecting the appliance from the power supply. The fault itself must ﬁrst be rectiﬁed.

If you cannot remedy the fault, notify your qualiﬁed contractor. To facilitate and speed up your request, provide the number from the type plate (000000-0000-000000).

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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.

7.2 Instructions, standards and regulations

Note

Observe all applicable national and regional regulations and instructions.

7.3 Operation of the appliance in buildings with

combustion equipment

If the building contains combustion equipment (tiled stoves, ﬁreplaces, etc.), the responsible ﬂue gas inspector must be consulted in the planning phase. The ﬂue gas inspector assesses whether all

statutory regulations are being observed. Here, a differentiation is made between balanced and open ﬂue combustion equipment.

For simultaneous operation of combustion equipment and a mechanical ventilation system, we recommend choosing approved room sealed combustion equipment (in Germany, DIBt approval).

7.3.1 Room sealed combustion equipment

In conjunction with room sealed combustion equipment, no additional precautions are generally required. Assessment is carried out by the ﬂue gas inspector.

7.3.2 Open ﬂue combustion equipment

!

WARNING INJURY If open ﬂue combustion equipment is operated with the mechanical ventilation system, tested safety equipment must be installed. The combustion equipment must also have a separate combustion air supply.

With open ﬂue combustion equipment, a differentiation must be made between alternate and simultaneous operation of the ventilation system and combustion equipment.

Alternate operation

Operation on alternate sides means that, when the combustion equipment is commissioned, the mechanical ventilation system is switched off and/or cannot be started.

Simultaneous operation

!

WARNING INJURY To prevent any ﬂue gas escaping into the installation room, it is necessary to ensure that sufﬁcient combustion air is supplied or that the negative pressure in room where the stove is installed is not greater than 4 Pa. Tested safety equipment must be installed to monitor the chimney draught (differential pressure monitoring) and to switch off the ventilation unit in the event of a fault.

Connect the safety equipment according to the chapter "Installation / Electrical connection/ ConnectionX15/ Connecting safety equipment for stove/ﬁreplace operation".

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 ventilation.

- 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.

 Connect the safety equipment with a ﬂoating contact (see

chapter "Electrical connection / Connection X15").

The mechanical ventilation system is switched off when the safety equipment responds.

Note

The maximum available external pressure (see chapter "Speciﬁcation/ Data table") must not be exceeded.

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INSTALLATION

Appliance description

8. Appliance description

8.1 Standard delivery

The following are delivered with the appliance:

- Wall mounting bracket set (2mounting brackets, 3protective caps, 1rubber strip, 2rubber rings, 1 set of installation instructions)

- PVC condensate drain connection (1plastic nut1.5”, 1sealing ring, 1glued joint PVC ﬁtting32 mm)

- Approx. 90 cm long cable for connecting a remote control

8.2 Required accessories

- Hardwired remote control used to control the air ﬂow rates preset in three stages. Our range of accessories includes remote control units with additional functions.

8.3 Further accessories

You can also obtain ventilation pipes, extract air and supply air valves and similar accessories from us.

9. Preparations

9.1 Installation site

The appliance can be mounted on the wall with the wall mounting bracket set supplied.

!

Material losses

For vibration-free mounting, a solid wall with a minimum mass of 200kg/m2 is required. 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 equipment is level after installation.

The installation site must have an adequate condensate drain with stench trap and a fall for the condensate.

The installation site must be free from the risk of frost.

9.2 Transport

To protect the appliance against damage, you should transport it to the installation room inside its original packaging.

10. Installation

10.1 Mounting the appliance

10 mm

26�04� 15�0078

 Undo the two top crosshead screws on the back of the

appliance.

 Secure one of the two rails to the appliance with screws.

!

Material losses

 Check whether the wall can bear the weight of the

appliance.

 Use appropriate rawl plugs and screws suitable for

the wall structure to attach the rail.

 Mount the second rail on the wall as a retainer. To avoid

sound transmission, place the washers supplied between the wall and the rail.

 Afﬁx the spacers supplied to the back of the appliance.

26�04� 15�0079

 Place the rubber strips supplied on the rail mounted on the

wall. The rubber strips are also meant to provide additional anti-vibration separation.

 Fit the appliance so that the two rails interlock.

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INSTALLATION

Installation

10.2 Connecting the condensate drain

!

Material losses

Never kink the hose, to ensure the condensate drains perfectly. The fall must be at least 10%, and the appliance must be horizontal.

> 60

D0000046572

2

1

1 Condensate drain 2 Condensate drain connector (Ø32mm) with union nut

The condensate drain is routed through the ﬂoor plate. The condensate must drain away via the domestic sewer system.

 Secure the condensate drain connector supplied along with

the gasket and union nut to the condensate drain located underneath the appliance.

You can ﬁt the condensate drain pipe (bent if required) to this condensate drain connector with a glued joint.

 Before connecting the condensate drain to the appliance,

pour water into the siphon to create a stench trap.

The condensate drain pipe must terminate below the water level in the siphon. The condensate drain pipe must be immersed in the water in the siphon by at least 60 mm.

10.3 Connecting air ducts

During installation, ensure that no metal swarf enters the ductwork. However, should this occur, remove this debris, otherwise the fans may be damaged.

External wall ducts

Supply outdoor air from a location where contamination (dust, soot, odours, ﬂue gas, exhaust air) is as low as possible.

When installing external wall ducts, prevent any short circuit between the air intake and the air discharge.

Silencers

Always install a silencer in both the supply air duct and the extract air duct. We recommend installing additional silencers if required to avoid sound transmission.

If a room with a high noise level must be ventilated, install additional silencers upstream of this room to reduce sound transmission to adjacent 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 valves. If required, insulate the supply air ducts, e.g. if they are outside the insulated wall panel.

Overﬂow apertures

In living rooms and bedrooms, air is only blown in. Air is only extracted from rooms where odours and moisture are generated. Ventilation grilles must be installed in internal doors or walls, or the air gap beneath the door must be increased to ≥ 8 mm to ensure an unobstructed air ﬂow.

Insulation against condensation

!

Material losses

When warm air meets cold surfaces, condensation can result.

 For outdoor air and exhaust air ducts, use va-

pour-proof thermally insulated pipes.

 If you use uninsulated pipes and moulded parts for

this pipework, ensure that they are adequately insulated.

 Insulate the supply air and extract air ducts if they

are routed through unheated rooms.

The extract air duct does not require a control valve, because the necessary air ﬂow rates are controlled by the appliance itself.

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INSTALLATION

Installation

10.4 Power supply

WARNING Electrocution Carry out all electrical connection and installation work in accordance with national and regional regulations.

WARNING Electrocution Before connecting the appliance to the mains power supply, isolate all power cables. Isolation from the mains power supply must be carried out with a contact separation of at least 3 mm, e.g. by means of omnipolar isolators.

The appliance can be connected at a socket using the plug ﬁtted to the appliance.

Take the power consumption of the preheater coil into consideration.

10.4.1 Terminal X1

Connection for eBUS or OpenTherm plug-in connection

The appliance can operate with both an OpenTherm and an eBUS protocol. Provide the accessories required for this on site.

Subject to the setting of parameter 08 in the settings menu, you can choose between eBUS and OpenTherm.

X1

26�04�15�0019

To connect an eBUS or OpenTherm connection, there is a 2-pole X1 connection on the back of the display cover.

The eBUS protocol can, for example, be used to link appliances (cascade control). In the context of sensitivity to polarity, always connect contacts X1-1 and X1-1, and contacts X1-2 and X1-2. If the contacts are interchanged, the appliance will not work.

With the OpenTherm protocol, swapping over the cable connection at the 2-pole screw connection X1 does not affect the functioning of the appliance.

The eBUS connection is set as default in parameter08.

The X1 connection is only suitable for low voltage.

10.4.2 X2 connection

Connecting a stage switch

Note

Route the stage switch cable and power cable for the ventilation unit separately.

X2

26�04�15�0019

Connect the stage switch (not part of standard delivery) to the modular plug-in connection, type RJ12 (X2 connection). The X2 connection is on the back of the appliance's display cover.

Depending on which stage switch is connected, connect a type RJ11 or RJ12 plug.

- When using a 4-stage switch with ﬁlter status indicator, connect an RJ12 plug in conjunction with a 6-wire modular cable.

- When using a 3-stage switch without ﬁlter status indicator, connect an RJ11 plug in conjunction with a 4-wire modular cable.

A combination of stage switches is also possible. The X2 connection is only suitable for low voltage.

10.4.3 Connection X14

X14

26�04�15�0003

The X14 connection is used to connect an external reheater coil.

The 2-pole X14 connection can be accessed once you have removed the display cover. The display cover has a second union nut. This union nut enables any connected 230V cable, which can be connected at X14, to be routed out of the appliance.

The X14 connection is disabled as default.

 If you connect a reheater coil, adjust parameter13 in the set-

tings menu.

The max. permissible connected load is 1000W.

 If you connect a reheater coil, also connect the temperature

sensor for the reheater coil across X15-7 and X15-8.

 Secure the power cable that is routed to the reheater coil

using the strain relief below the display cover.

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INSTALLATION

Installation

10.4.4 Connection X14

1 2 3 4 5 6 7 8 9

26�04�15�0002

The 9-pole X15 terminal strip can be accessed on the back of the display cover without having to open the appliance.

Connection X14 Purpose Parameter 15 Parameter 21

1 & 2 External switching contact 0 N/O contact (factory set ting)

1 0 - 10V input; X15-1 = GND & X15-2 = 0 - 10V 2 N/C contact

3 Switching input 1: Bypass open = 12V; bypass closed = 0V 4 Switching input 1: Bypass open = 0V; bypass closed = 12V 3 & 4 Input 0 - 10V 0 N/O contact

1 0 - 10Vinput (= factory setting) 2 N/C contact

3 Switching input 2: Bypass open = 12V; bypass closed = 0V 4 Switching input 2: Bypass open = 0V; bypass closed = 12V 5 & 6 24V connection max. 4.5V A; 5 = earth; 6 = + 7 & 8

Connection of sensor for reheater coil or outside temperature for geothermal heat exchanger

9 Valve control signal (0 or 10V) 9 = + ; 5 = ear th

ENGLISH

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INSTALLATION

Installation

Connection of an external switching contact across X15-1 and X15-2

By adjusting parameter 18, when the input of "external switching contact 1 (X15-1 and X15-2)" is closed, you can set ﬁve different operating modes for the supply air and extract air fans. Subject to the setting for parameters 19 and 20, the supply air and extract air fans can deliver different air ﬂow rates (maximum air ﬂow rate is displayed).

Parameter 18

Function conditions

Supply air fan and extract air fan operating mode

Parameter 19

Parameter 20

Action, supply air or extract air fan when closing contact

input X15-1& X15-2

0 Contact input1 (X15-1 & X15-2)

closed

No action possible, because contact input 1 has not been enabled (parameter 18 is still on 0)

1 Contact input1 (X15-1 & X15-2)

closed

Action dependent on the setting for the supply air fan (parameter 19) and the extract air fan (parameter 20)

0 0 Fan switches of f

1 1 Fan on minimum air flow rate

(50m3/h)

2

Contact input1 (X15-1 & X15-2) closed; bypass conditions for "Damper open" are met

2

Fan on air flow rate stage 1

3 3 Fan on air flow rate stage 2

4 4 Fan on air flow rate stage 3

3

Contact input1 (X15-1 & X15-2) closed

The bypass damper opens; automatic bypass control unit in the appliance is 'overridden'; action of the fans subject to parameters 19 and 20.

5

Fan on air flow rate step switch

6 6 Fan on max. air flow rate

4

Contact input X15-1 & X15-2 closed

The supply air diverter valve opens. The supply air diverter valve (24V) is connected to X15-5 (24V GND), X15-6 (24V +) and X15-9 (0-10V control unit); the action of the fans is subject to parameters 19 and 20.

7

No fan control

If connections X15-3 and X15-4 are programmed as switching input2, you can use parameters 24, 25 and 26 to set the individual operating modes similarly to contact input 1. When contact input2 is closed, "CN2" is displayed.

10.4.5 Connection of safety equipment for operation of a stove/ ﬁreplace

Version 1: Connection of safety equipment at X15

 Close the safety equipment ﬂoating contact for stove/ﬁreplace

operation at X15-1 and X15-2.

 Set parameter 18 to 1, and parameters 19 and 20 to 0. If the

safety equipment closes the power circuit across X15-1 and X15-2, the extract air fan and the supply air fan are switched off.

Version 2: Power supply interruption through safety equipment

 Connect the safety equipment in accordance with the diagram

in chapter "Electrical connection/ Standard circuit".

16 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

INSTALLATION

Installation

10.4.6 Standard circuit

L N PE

1/N/PE 230V ~50Hz

Lüftungsgerät

6 x 0,5 mm² max. 30 m

Schalter

Kaminbetrieb

Ofen

Raum

Druckanschluss

Differenzdruckcontroller für Feuerstätten

X2

ZLWZ 4S

24 V

P (0V)0 2 3LED

24 V

P (0V)0 2 3LED

FEZ

24 V

P (0V)0 23 LED

12104 115

FEQ

24 V

P (0V)02 3LED

64

251

3-Stufen-Schalter

24 V

P (0V)0 23 LED

3

2

1

D0000055737

3-Stufen-Schalter 3-stage switch ZLWZ 4S 4-stage switch FEQ Air quality sensor FEZ Remote control Lüftungsgerät Ventilation unit Ofen Stove Raum Room Druckanschluss Pressure connection Schalter Kaminbetrieb Switch, fireplace operation Differenzdruckcontroller

für Feuerstätten

Differential pressure controller for combustion equipment

ENGLISH

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INSTALLATION

Commissioning

11. Commissioning

11.1 Initial start-up

11.1.1 Setting the air ﬂow rate

Output and energy consumption of the appliance depend on the pressure drop in the duct system and the resistance of the ﬁlters.

Fan stage Air flow rate

m³/h

0

50: Moisture protection ventilation This fan stage prevents mould formation using the

factory-set air flow rate of 50m³/h.

m³/h must be lower than for stage 2

m³/h must be lower than for stage 3

m³/h LWZ 370 plus: 50 - 400

m³/h LWZ 170 E plus: 50 - 300

The air ﬂow rate of the higher fan stage is automatically selected if one of the above conditions is not met.

11.2 Shutdown

Even during longer periods away from home, we recommended that the equipment should be allowed, via the remote control, to run at switch position1. If you nevertheless need to take the appliance out of use for an extended period, switch it off via the user interface and unplug it from the mains to isolate it from the power supply.

 Clean or replace ﬁlters.

11.3 Recommissioning

 Check whether ﬁlters are ﬁtted in the appliance. Never start

the appliance without ﬁlters.

 Check whether the condensate drain is damaged or kinked.

12. Settings

12.1 Settings menu

For optimum appliance function, you can change parameters used to adapt the appliance to the actual installation. Some parameter settings such as the air ﬂow rates have been set out in the technical details appertaining your individual building.

Note

Changes to settings not described may only be made by agreement with the manufacturer. Incorrect settings may impair the correct appliance function.

12.1.1 How to set parameters

Selecting the settings menu

 Press menu in standard mode.

The settings menu is displayed ("SET").

26�04�15�0064

Enabling the settings menu

 Press menu again to enable the settings menu.

26�04�15�0065

Selecting parameters

 Use the plus or minus key to select the parameter you want

to set.

26�04�15�0066

1 2

1 Parameter number 2 Parameter value

18 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

INSTALLATION

Settings

Parameter change

 Press menu.

26�04�15�0067

 The parameter value starts to ﬂash.  Use plus or minus to change the parameter value.

26�04�15�0068

Discarding a parameter change

 If you do not want to save the changed parameter value,

press R.

26�04�15�0069

Conﬁrm parameter value

26�04� 15�0070

 If you want to save the changed parameter value, press

menu.

Note

To change other parameters, repeat the steps described from "Selecting parameters". If you do not want to change any more parameters, press R to return to standard mode.

ENGLISH

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INSTALLATION

Settings

12.1.2 List of parameters in the settings menu

Parameter

Description

Unit Factory setting

Setting range Step

size

Display text and symbols

01

Air flow rate of stage

m3/h 50 0

50: Moisture protection ventilation 02 Air flow rate of stage 1 m

3

/h 100 LWZ 370 plus: 50 - 400 5

LWZ 170 E plus: 50 - 300 03 Air flow rate of stage 2 m

3

/h LWZ 370 plus: 200 LWZ 370 plus: 50 - 400 5

LWZ170Eplus: 150 LWZ 170 E plus: 50 - 300 04 Air flow rate of stage 3 m

3

/h LWZ 370 plus: 300 LWZ 370 plus: 50 - 400 5

LWZ170Eplus: 225 LWZ 170 E plus: 50 - 300 05 Bypass temperature °C 22 15 - 35 0.5

BYPA SS

06 Bypass hysteresis °C 2 0 - 5 0.5

BY HYS

07 Bypass damper function 0 0 (Automatic function)

BYPA SS

1 (Bypass damper closed) 2 (Bypass damper open) 08 Communication eBUS

OT (OpenTherm) eBUS OT/BUS 09 BUS address 0 0 - 9 (0 = master) BUSADR 10 Introduction of an additional extract

air flow.

OFF As default, this parameter must remain OFF for this

appliance.

CV+WTW

11 Pressure imbalance permissible ON

OFF (Air flow rate for supply/extract air the same)

ON (Pressure imbalance permissible) 12 Fixed pressure imbalance m3/h 0 -100 - 100 1

13 Heating coils 0 0 (Aus)

HEATER

1 (Preheater coil) 2 (Reheater coil) 14 Reheater coil temperature °C 21 15 - 30 0.5

HEATER

15 Selection, switching input1 0 0 (N/O contact) V1

1 (0 - 10V input)

2 (N/C contact)

3 (Bypass open = 12V; bypass closed = 0V) 4 (Bypass open = 0V; bypass closed = 12V) 16 Minimum voltage, switching input1 V 0 0 - 10 0.5 V1 MIN 17 Maximum voltage, switching input1 V 10 0 - 10 0.5 V1 MAX 18 Conditions, switching input1 0

0 (Aus) CN1

1 (Ein)

2 (On, if conditions for open bypass are met)

3 (Bypass control) 4 (Supply air diverter valve) 19 Supply air fan mode, switching

input 1

5

0 (Supply air fan off)

CN1 1 (Absolute minimum air flow rate 50 m3/h) 2 (Air flow rate stage 1) 3 (Air flow rate stage 2) 4 (Air flow rate stage 3) 5 (Step switch) 6 (Max. air flow rate)

7 (No supply air fan control)

20 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

INSTALLATION

Settings

Parameter

Description

Unit Factory setting

Setting range Step

size

Display text and symbols

20 Extract air fan mode,

switching input 1

5

0 (Extract air fan off)

CN1 1 (Absolute minimum air flow rate 50 m3/h) 2 (Air flow rate stage 1) 3 (Air flow rate stage 2) 4 (Air flow rate stage 3) 5 (Step switch) 6 (Max. air flow rate)

7 (No extract air fan control) 21 Selection, switching input2 1 0 (N/O contact) V2

1 (0 - 10V input) 2 (N/C contact) 3 (Bypass open = 12V; bypass closed = 0V)

4 (Bypass open = 0V; bypass closed = 12V) 22 Minimum voltage, switching input2 V 0 0 - 10 0.5 V2 MIN 23 Maximum voltage, switching input2 V 10 0 - 10 0.5 V2 MAX 24 Conditions, switching input 2 0

0 (Aus) CN2 1 (Ein) 2 (On, if conditions for open bypass are met) 3 (Bypass control)

4 (Supply air diverter valve) 25 Supply air fan mode, switching

input2

5

0 (Supply air fan off)

CN2 1 (Absolute minimum air flow rate 50 m3/h) 2 (Air flow rate stage 1) 3 (Air flow rate stage 2) 4 (Air flow rate stage 3) 5 (Step switch) 6 (Max. air flow rate)

7 (No supply air fan control)

26

Extract air fan mode, switching input 2

5

0 (Extract air fan off)

CN2

1 (Absolute minimum air flow rate 50 m3/h) 2 (Air flow rate stage 1) 3 (Air flow rate stage 2) 4 (Air flow rate stage 3) 5 (Step switch) 6 (Max. air flow rate)

7 (No extract air fan control) 27 Geothermal heat exchanger OFF

OFF (Valve control for geothermal heat exchanger of f) EWT

ON (= Valve control for geothermal heat exchanger on) 28

Minimum temperature for geothermal heat exchanger (below this temperature, the valve opens)

°C 5

0 - 10

0.5 EW T T-

29

Maximum temperature for geothermal heat exchanger (above this temperature, the valve opens)

°C 25

15 - 40

0.5 EW T T+

ENGLISH

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INSTALLATION

Settings

12.2 Read-out menu

With the read-out menu, you can call up some values for more detailed information on the function of the appliance. Values and settings cannot be changed in the read-out menu.

 Press menu in standard mode.

The settings menu is displayed ("SET").

26�04�15�0064

 Press plus or minus to switch to the read-out menu.

26�04� 15�0071

 Press menu to enable the read-out menu.

26�04� 15�0072

Use plus or minus in the read-out menu to move to the required parameter.

26�04� 15�0073

1 2

Parameter Description of the actual value Unit

01 Room temperature °C 02 Outside temperature (captured by the outside temper-

ature sensor)

o

C

03 Bypass status (ON = Bypass damper open,

OFF = Bypass damper closed)

04 Frost protection status (ON = Frost protection enabled,

OFF = Frost protection disabled) 05 Supply air duct pressure Pa 06 Extract air duct pressure Pa 07 Air flow rate of supply air fan m3/h 08 Air flow rate of extract air fan m3/h

 Press R twice to return to standard mode.

2 x

26�04� 15�0074

If no key is pressed for 5 minutes, the appliance returns automatically to standard mode.

12.3 Service menu

In the service menu, you can view the last 10 fault messages.

In the case of blocking faults, the settings menu and the read-out menu are blocked and only the service menu can be accessed. Pressing menu opens the service menu.

Viewing the service menu

 Press menu in standard mode. The settings menu is

displayed.

26�04�15�0064

 Press plus or minus to switch to the read-out menu.

26�04�15�0057

 Press menu to enable the service menu.

22 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

INSTALLATION

Settings

26�04�15�0058

1

2

1 Fault message number 2 Fault code

You can use plus and minus to scroll through the read-out menu.

Indication "No fault message"

26�04�15�0056

Current fault message (fault symbol on the display)

For fault messages with a cause that has not yet been eliminated, the fault symbol (spanner) appears.

26�04� 15�0075

Resolved fault message (no fault symbol on the display)

For fault messages with a caused that has been eliminated, the fault symbol (spanner) does not appear.

26�04� 15�0076

Back to standard mode

 Press R twice to return to standard mode.

2 x

26�04� 15�0074

Deleting fault messages

You can delete all fault messages by holding down R for ﬁve seconds. This is only possible if there are no active faults.

12.4 Restoring factory settings

It is possible to reset all changed settings simultaneously to factory settings.

All changed settings revert back to their defaults as delivered from the factory; all message/fault codes are also deleted from the service menu.

 Press plus and minus simultaneously and hold down for 10

seconds.

26�04� 15�0077

All display symbols light up for three seconds. The appliance is then in standard mode.

ENGLISH

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INSTALLATION

Maintenance

13. Maintenance

WARNING Electrocution In the event of damage to the power cable this must always be replaced by a qualiﬁed contractor authorised by the manufacturer, using original spare parts.

Maintenance by the qualiﬁed contractor includes the cleaning of the cross-countercurrent heat exchanger and the fans.

Subject to runtime, this maintenance work should be carried out every 3 years.

 Switch off the appliance by pressing the minus key for

5seconds.

 Disconnect the power supply.  Open the ﬁlter door.  Extract the ﬁlters. Make a note of how the ﬁlters were ﬁtted.

26�04�15�0042

 Remove the front cover.

26�04�15�0043

 Carefully remove the heat exchanger from the appliance.

Avoid damaging the foam parts in the appliance.

26�04�15�0047

 Use a commercially available vacuum cleaner to remove dust

and other loose dirt particles from the intake and discharge surfaces.

 If required, clean the heat exchanger with warm water

(max.55 °C) and a commercially available detergent. Never use solvents.

 Afterwards ﬂush the heat exchanger with water.  Remove the plug-in connections from the back of the display

cover.

26�04�15�0044

 Undo both screws securing the display cover to the

appliance.

26�04�15�0046

 Remove the display cover.  Disconnect the 4 pressure hoses and 3 plug-in connections

from the PCB.

24 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

INSTALLATION

Maintenance

26�04�15�0045

 Extract the fan unit from the appliance.

26�04�15�0020

 Place the fan unit on a ﬂat surface with the pressure hoses

facing up.

 Pull the red and blue pressure hose (without a black mark)

out of the pressure tubes inside the fan unit. Ensure that no dirt drops into the pressure tubes.

 Rotate the foam part so that the pressure hoses are pointing

down.



26�04�15�0022

 Carefully remove the top EPS insulation semi-shell so that

both fans are accessible. Ensure that the fans remain in the lower EPS insulation semi-shell.

26�04�15�0021

 Clean the fans with a soft brush. Never displace the pressure

compensation weights.

 Replace the top EPS insulation semi-shell over the fans.  Reconnect the pressure hoses to the pressure tubes. Ensure

that no dirt drops into the pressure tubes.

 Reinstall the complete fan unit in the appliance.  Reconnect the pressure hoses and fan cables to the PCB.

Ensure that the pressure hoses are positioned correctly on the marking labels on the pressure sensors. Observe the label in the appliance for correctly positioning the plug-in connections.

 Fit the display cover.  Reconnect the previously disconnected plugs at the back of

the display cover.

 Slide the heat exchanger back into the appliance.  Fit the front cover.  Insert the ﬁlters, respectively with their clean sides facing

towards the heat exchanger.

 Close the ﬁlter door.  Switch on the power supply.  Switch on the appliance using the user interface by holding

down minus for 5 seconds.

 After cleaning the ﬁlter or installing a new ﬁlter, reset the ﬁl-

ter status indicator by holding down R for 5 seconds.

Cleaning the air ducts

Air ducts should be checked and possibly cleaned at regular intervals. Releasing the air ducts from the appliance or over the extract air and supply air valves enables inspection and cleaning.

ENGLISH

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INSTALLATION

Troubleshooting

14. Troubleshooting

Fault code Blocking

fault

Cause Appliance behaviour Measure

E100

no

Supply air fan pressure sensor faulty. Red pressure hoses blocked or kinked.

Switches over to constant speed control. At an outside temperature below 0°C, the preheater coil switches on.

Isolate the appliance from the power supply. Check the red pressure hoses (including pressure tubes) for dirt, kinks or damage.

E101

no

Extract air fan pressure sensor faulty. Blue pressure hoses blocked or kinked.

Switches over to constant speed control. At an outside temperature below 0°C, the preheater coil switches on.

Isolate the appliance from the power supply. Check the blue pressure hoses (including pressure tubes) for dirt, kinks or damage.

E103

no

Bypass fault y.

None. If the power is too low, the stepper motor is not correctly connected or is faulty; if the power is too high, there is a short circuit in the cabling or the stepper motor.

Isolate the appliance from the power supply. Check the stepper motor connection. Replace the cabling or stepper motor if required.

E104

Yes

Extract air fan faulty

Both fans are switched off. The preheater coil is switched off. The reheater coil, if present, is switched off. Restarting occurs every 5 minutes.

Isolate the appliance from the power supply. Replace the extract air fan. Switch on the power supply to the appliance again. The fault is reset automatically. Check the cabling.

E105

Yes

Supply air fan faulty

Both fans are switched off. The preheater coil is switched off. The reheater coil, if present, is switched off. Restarting occurs every 5 minutes.

Isolate the appliance from the power supply. Replace the supply air fan. Switch on the power supply to the appliance again. The fault is reset automatically. Check the cabling.

E106

Yes

The temperature sensor for capturing the outside temperature is faulty.

Both fans are switched off. The preheater coil is switched off. Bypass closes and is blocked.

Isolate the appliance from the power supply. Replace the outside temperature sensor. Switch on the power supply to the appliance again. The fault is reset automatically.

E107

no

The temperature sensor for capturing the extract air temperature is faulty.

Bypass closes and is blocked.

Isolate the appliance from the power supply. Replace the room temperature sensor.

E108

no

If installed: The temperature sensor for capturing the outside temperature is faulty.

The reheater coil, if present, is switched of f. The geothermal heat exchanger, if present, is switched off.

Replace the temperature sensor for the outside temperature.

E999

Yes

The microswitches on the control PCB are not set correctly.

The appliance does not operate; the red fault LEDs at the stage switch are also off.

Adjust the microswitches correctly.

Correct microswitch setting

 Check whether the microswitches on the control PCB are

set correctly (see diagram). If message E999 is nevertheless displayed, replace the control PCB with a PCB of the correct type.

LWZ 370 plus

26�04�15�0018

LWZ170Eplus

D0000045299

Stage switch modular connector

If stage2 on a stage switch does not work, the modular connector of the stage switch is not connected correctly.

 Cut off one of the RJ plug-in connections to the stage switch

and ﬁt a new plug-in connection the other way round.

Pressure drop at the connections of the pressure hoses

For fan control, the appliance takes into account the pressure readings. The pressure sensors are ﬁtted to the control PCB. Two pressure hoses are routed from each fan to the pressure sensors. If the pressure hoses are not connected correctly, leak or are blocked, pressure is captured incorrectly and the fans are therefore not correctly controlled.

 Check the connections of the pressure hoses if you have

doubts about the correct functioning of the appliance.

26 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

INSTALLATION

Specication

15. Speciﬁcation

15.1 Dimensions and connections

677

45

879

765

138

388

138

328

280

526

564

g03

g05

g04

g06

d45

b01

D0000021554

LWZ 370

plus

LWZ 170 E

plus

b01 Entry electrical

cables

d45 Condensate drain Diameter mm 32 32

g03 Outdoor air

Nominal diameter

DN 180

DN 160

g04 Exhaust air

Nominal diameter

DN 180

DN 160

g05 Extract air

Nominal diameter

DN 180

DN 160

g06 inrushing air

Nominal diameter

DN 180

DN 160

15.2 Minimum clearances

≥400

≥700

≥400

D0000023251

15.3 Data table

LWZ 370

plus

LWZ 170 E

plus

232033 233850 Sound data Sound power level (EN 12102) dB(A) 54 45 Electrical data Rated voltage V 230 230 Max. current drawn A 6 6 Power consumption without preheater coil A 0.7 0.5 Power consumption with preheater coil A 6 6 Phases 1/N/PE 1/N/PE Frequency Hz 50 50 Fan power consumption W 9- 172 9 - 138 Power consumption without preheater coil W 172 132 Power consumption with preheater coil W 1380 1350 Versions IP rating IP30 IP30 Filter class G4 G4 Dimensions Height mm 765 765 Width mm 677 677 Depth mm 567 567 Weights Weight kg 38 38 Connections Air connector diameter mm 180 160 Condensate connection mm 32 32 Values Air flow rate m³/h 50-400 50-300 Heat recovery level up to % 90 90 Extract air application range °C 15-3 0 15-30 Max. ambient temperature °C 60 60 Available external pressure, ventilation Pa 160 160

ENGLISH

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INSTALLATION

Specication

15.4 Wiring diagram

B

C

D

E

3

2

1

A

BN

WH

BN

WH

BN

WH

D0000046340

A 3-stage switch, 4-stage switch, air quality sensor FEQ or

remote control FEZ (see chapter "Installation/ Electrical

connection/ Standard circuit") B Outside temperature sensor C Additional preheater coil D Room temperature sensor E Service connection

15.5 Sound

In practice, measuring tolerances mean that the value may deviate by 1dB(A).

Sound power LWZ 370 plus

Ventilat ion rate [m3/h]

100 200 225 300 400

Static pressure Pa 9 40 38 80 47 100 84 175 240 150 225

Sound power level Lw (A)

Appliance noise emission

dB(A) 29.5 32.5 40.5 41.5 43.5 47. 5 51.0 53.0 54.0 54.5 57.0

Exhaust air duct dB(A) 31.5 34.5 46.5 48.0 48.5 50.0 56.5 57.0 58.0 59.0 60.0

Outdoor air duct dB(A) 42.5 47.5 57.0 59.0 60.5 62.5 66.0 68.0 69.5 70.5 71.5

Sound power LWZ 170Eplus

Ventilat ion rate [m3/h]

90 150 210 300

Static pressure Pa 50 100 50 100 50 100 50 100

Sound power level Lw (A)

Appliance noise emission

dB(A) 30 33 38 38 44 46 50 52

Exhaust air duct dB(A) 33 34 39 42 45 46 54 54

Outdoor air duct dB(A) 44 47 52 55 60 60 67 67

28 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

INSTALLATION

Specication

15.6 Fan diagram

LWZ 370 plus

0

25

50

75

100

125

150

175

200

225

250

275

300

0 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425

0,33

0,45

0,46

0,23

0,42

0,27

0,18

0,16

0,20

0,24

0,15

0,17

0,22

0,26

0,33

0,36

0,29

0,20

0,15

0,14

0,17

0,13

0,15

0,40

D0000042024

X Air ﬂow rate [m³/h] Y Average value, static pressure [Pa]

x

Power consumption of both fans [Wh/m³]

LWZ170Eplus

0

25

50

75

100

125

150

175

200

225

250

275

300

50 75 100 125 150 175 200 225 250 275 300 325

0,22

0,26

0,19

0,24

0,35

0,26

0,14

0,16

0,20

0,23

0,31

0,16

0,29

0,35

0,15

0,46

0,40

D0000042028

X Air ﬂow rate [m³/h] Y Average value, static pressure [Pa]

x

Power consumption of both fans [Wh/m³]

ENGLISH

WWW.STIEBEL-ELTRON.COM LWZ 170 E PLUS / LWZ 370 PLUS | 29

GUARANTEE | ENVIRONMENT AND RECYCLING

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 aect 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.

30 | LWZ 170 E PLUS / LWZ 370 PLUS WWW.STIEBEL-ELTRON.COM

NOTES

ENGLISH

WWW.STIEBEL-ELTRON.COM LWZ 170 E PLUS / LWZ 370 PLUS | 31

NOTES



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

Irrtum und technische Änderungen vorbehalten! | Subject to errors and technical changes! | Sous réserve d‘erreurs et de modifications techniques! | Onder voorbehoud van ver

g

issingen en technische wijzigingen! |

Salvo error o modificación técnica! | Excepto erro ou alteração técnica | Zastrzeżone zmian

y

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 9046

Australia

STIEBEL ELTRON Australia Pty. Ltd. 6 Prohasky Street | Port Melbourne VIC 3207 Tel. 03 9645-1833 | Fax 03 9645-4366 info@stiebel.com.au www.stiebel.com.au

Austria

STIEBEL ELTRON Ges.m.b.H. Eferdinger Str. 73 | 4600 Wels Tel. 07242 47367-0 | Fax 07242 47367-42 info@stiebel-eltron.at www.stiebel-eltron.at

Belgium

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 (Guangzhou) Electric Appliance Co., Ltd. Rm 102, F1, Yingbin-Yihao Mansion, No. 1 Yingbin Road Panyu District | 511431 Guangzhou Tel. 020 39162209 | Fax 020 39162203 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

France

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

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

Japan

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 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

Poland

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

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

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 AG Industrie West Gass 8 | 5242 Lupfig Tel. 056 4640-500 | Fax 056 4640-501 info@stiebel-eltron.ch www.stiebel-eltron.ch

Thailand

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 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

United States of America

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

A 311820-38851-9059

B 297212-38851-9059

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STIEBEL ELTRON LWZ 170 E plus, LWZ 370 plus Operation And Installation

Specifications and Main Features

Frequently Asked Questions

User Manual