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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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
ENGLISH
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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
26�04�15�0013
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
ENGLISH
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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
26�04�15�0060
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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