STIEBEL ELTRON LWZ 70 E Operation And Installation

OPERATION AND INSTALLAT ION

Central ventilation unit 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 Units of measurement �� 3

1.4 Standardised output data �� 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 ��4

4.1 Remote control �� 4

4.2 User interface on the appliance�� 4

4.3 Switching the appliance on �� 5

4.4 Switching off the appliance �� 5

4.5 Standard mode �� 6

5. Maintenance, cleaning and care ��7

5.1 Replacement ﬁlter �� 7

5.2 Cleaning ﬁlters �� 7

6. Troubleshooting ��8

6.1 Fault analysis �� 8

6.2 Fault code �� 8

INSTALLATION

7. Safety �� 9

7.1 General safety instructions �� 9

7.2 Instructions, standards and regulations �� 9

7.3 Operation of the appliance in buildings with combustion equipment �� 9

8. Appliance description �� 10

8.1 Standard delivery �� 10

8.2 Required accessories ��10

8.3 Further accessories�� 10

9. Preparations �� 10

9.1 Installation site �� 10

9.2 Transport �� 10

10. Installation �� 10

10.1 Mounting the appliance ��10

10.2 Connecting the condensate drain �� 11

10.3 Connecting air ducts �� 11

10.4 Power supply �� 12

11. Commissioning �� 12

11.1 Initial start-up �� 12

11.2 Shutdown ��12

11.3 Recommissioning �� 12

12. Settings �� 13

12.1 Settings menu �� 13

12.2 Read-out menu ��14

12.3 Service menu �� 15

12.4 Restoring factory settings �� 16

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".

13. Maintenance �� 16

14. Troubleshooting �� 18

15. Speciﬁcation �� 19

15.1 Dimensions and connections �� 19

15.2 Standard circuit �� 20

15.3 Wiring diagram �� 21

15.4 Fan diagram ��22

15.5 Data table �� 23

GUARANTEE

ENVIRONMENT AND RECYCLING

OPERATION

General information

ENGLISH

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OPERATION

1. General information

The chapters "Special Information" and "Operation" are intended for both the user 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)

Symbol Meaning

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 Units of measurement

Note

All measurements are given in mm unless stated otherwise.

1.4 Standardised output data

Explanations to determine and interpret the speciﬁed standardised output data

1.4.1 Standard: DIN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.

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.

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.

OPERATION

Appliance description

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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.

You can use the user interface to inﬁnitely adjust the air ﬂow rates. The appliance has a ﬁlter service indicator, as well as an optional ﬁlter service indicator at the stage switch.

The control unit has three fan stages. 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 se-

lected 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).

Frost protection

On account of the high heat recovery level, low outdoor temperatures result in the extract air being cooled down so severely that any condensate that is created in the process may freeze. Frost protection ensures that the extract air side of the heat exchanger cannot freeze. Depending on the outdoor air temperature and the pressure drop at the heat exchanger, the balance between

the supply air ﬂow and the extract air ﬂow is disrupted, thus preventing freezing. The supply air fan may also, for short periods, be switched OFF at very low outdoor temperatures. Preheating the outdoor air by using an electric preheating coil or by means of a geothermal heat exchanger, for example, can prevent this imbalance or can prevent the supply air fan shutting down.

Bypass function

The appliance is equipped with a bypass function. If the conditions for the bypass function are met, the ventilation air fan is switched off. This enables warm indoor air to be transported away. Once the conditions for the bypass function are no longer being met, the ventilation air fan is switched back on.

The bypass function can be adjusted in the settings menu using parameters 05, 06 and 07.

Conditions

Bypass function active

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.

Bypass function inactive

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

4. Settings

Note

User operations are restricted to switching the appliance ON and OFF. The basic settings are set by your qualiﬁed contractor when commissioning the appliance.

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.

D0000044898

1 2 3 4

1 Menu key 2 Minus key 3 LCD 4 Plus key 5 R key

You can access and change settings using the four keys (menu, plus, minus, R).

OPERATION

Settings

ENGLISH

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When the mains power is switched on, all available symbols are displayed for two seconds. The backlight is also switched on for 60 seconds.

If one of the 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

26�04�15�0009

 Plug the appliance into a standard socket.

26�04�15�0011

All display symbols are shown for two seconds.

26�04�15�0029

The software version is displayed for two seconds.

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

Switching on via software

26�04�15�0032

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

5 s

26�04�15�0031

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

seconds.

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".

26�04�15�0048

Interrupting the power supply

26�04�15�0010

The display is now blank.

OPERATION

Settings

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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.

D0000044913

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

D0000044914

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. This fan stage prevents mould formation using the factory-set air flow rate of 50m³/h.

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.

A number of appliances of this type have been connected. 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

D0000044915

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.

If you switch the appliance off using the programming unit, the text "OFF" appears.

4.5.3 Message texts in standard mode

D0000044921

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

Message text Description

FILTER

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

V1 or V2

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

Only when using connection X1:

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.

OPERATION

Maintenance, cleaning and care

ENGLISH

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5. Maintenance, cleaning and care

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

5.1 Replacement ﬁlter

Produc t designation

Part number Description

FMSLWZ 70 222446 Filter mat G3;

10pce per packing unit

FMSF7-2 70 227660 Fine f ilter F7;

2pce per packing unit

5.2 Cleaning ﬁlters

Filters must be cleaned when "FILT ER" is displayed.

D0000044917

 Replace ﬁlters annually.

Never operate the appliance without ﬁlters.

Cleaning or replacing ﬁlters

> 5 s

D0000041945

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

switch off the appliance.

 Remove the ﬁlter ﬂaps.

D0000041946

1 Extract air ﬁlter 2 Supply air ﬁlter

 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.

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

> 5 s

D0000041948

 Assemble the two ﬁlter ﬂaps.  Switch on the appliance by pressing the minusbutton for 5

seconds.

2 3

D0000044937

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

for 5 seconds to reset the ﬁlter display.

OPERATION

Troubleshooting

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

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

6. Troubleshooting

6.1 Fault analysis

D0000044931

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

Non-blocking fault

D0000044923

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). The type plate is located on the appliance cover.

+ 16 hidden pages

STIEBEL ELTRON LWZ 70 E Operation And Installation

Specifications and Main Features

Frequently Asked Questions

User Manual