STIEBEL ELTRON LWZ 304 SOL Instruction Manual

OPERATION
CENTRAL VENTILATION APPLIANCE WITH HEAT RECOVERY
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CONTENTS | OPERATION
General information
1. General information �����������������������������������������2
1.1 Safety instructions����������������������������������������������� 2
1.2 Other symbols in this documentation ����������������������� 2
1.3 Units of measurement ������������������������������������������ 3
2. Safety����������������������������������������������������������3
2.1 Intended use������������������������������������������������������ 3
2.2 Safety instructions����������������������������������������������� 3
2.3 CE designation ��������������������������������������������������� 3
2.4 Test symbols ������������������������������������������������������ 3
3. Appliance description ���������������������������������������3
4. Operation �����������������������������������������������������4
4.1 Controls������������������������������������������������������������ 4
4.2 Picture symbols in the display �������������������������������� 4
4.3 Activating���������������������������������������������������������� 5
4.4 Scroll wheel������������������������������������������������������� 5
4.5 Menu structure��������������������������������������������������� 6
4.6 Entering parameters �������������������������������������������� 6
4.7 Appliance functions ��������������������������������������������� 7
4.8 Selecting operating modes ����������������������������������� 14
4.9 Favourites, quick access, function block ������������������� 14
4.10 Fault message ��������������������������������������������������� 15
4.11 Operating modes overview ����������������������������������� 16
4.12 Menu overview�������������������������������������������������� 16
5. Cleaning, care and maintenance ������������������������� 23
5.1 Replacing supply air and extract air filters���������������� 23
6. Troubleshooting �������������������������������������������� 24
6.1 Filter symbols appear������������������������������������������ 24
6.2 No hot water����������������������������������������������������� 24
6.3 The safety valve of the cold water supply line is dripping
��������������������������������������������������������������������� 24
6.4 The fault symbol appears ������������������������������������� 24
6.5 The appliance leaks water ������������������������������������ 24
6.6 Condensate on the outside of the appliance or on the air
hoses �������������������������������������������������������������� 24
6.7 Noise is emitted������������������������������������������������� 24
6.8 The required flow temperatures are not reached, par-
ticularly during drying out������������������������������������ 24
6.9 The accommodation is always too cold �������������������� 24
6.10 The accommodation is always too hot ��������������������� 25
6.11 The accommodation is too cold in winter������������������ 25
6.12 The accommodation is too hot in winter������������������� 25
6.13 The accommodation is too cold in spring and autumn � 25
6.14 The accommodation is too hot in spring and autumn �� 25
6.15 The accommodation is too hot in summer ���������������� 25
6.16 Air quality is too poor������������������������������������������ 25
6.17 The air in winter is too dry ����������������������������������� 25
GUARANTEE
ENVIRONMENT AND RECYCLING
1. General information
This manual is intended for the appliance user and qualified con-
tractors.
Note
Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on the instructions to a new user if required.
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.
fSteps 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
Notes are bordered by horizontal lines above and below
the text. General information is identified by the adjacent
symbol.
fRead these texts carefully.
Symbol
!
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
!
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OPERATION
Safety
ENGLISH
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fThis symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
[MENU...] Square brackets around a text that starts with MENU
specify the position of a parameter in the menu tree. Example:
[MENU/VENTILATION/PARAMETERS]. This means you press MENU,
then enter submenu VENTILATION and there enter submenu
PARAMETER. In addition, a parameter number is specified if the
parameter has been assigned a number. Example: P78
1.3 Units of measurement
Note
All measurements are given in mm unless stated oth-
erwise.
2. Safety
2.1 Intended use
The appliance is a complete system with heat recovery for cen-
tralised ventilation and extraction, as well as for centralised DHW
heating and central heating.
The appliance is intended for domestic use, i.e. 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 inappro-
priate. Observation of these instructions is also part of the correct
use of this appliance. Any modifications or conversions to the
appliance void all warranty rights.
2.2 Safety instructions
Observe the following safety instructions and regulations.
All steps up to the complete commissioning of this appliance must
only be carried out by qualified contractors.
The qualified contractor is responsible for adherence to all current-
ly applicable instructions during installation and commissioning.
Operate the appliance only when fully installed and with all safety
equipment fitted.
Check the supply air and extract air filters regularly for contam-
ination.
Never adjust the ventilation and extract air valves inside the
rooms. These have been adjusted during commissioning.
Never make any modifications to the internal equipment electrics
or controls.
WARNING Electrocution
Never splash the appliance with water or other liquids.
WARNING Burns
There is a risk of scalding at outlet temperatures in ex-
cess of 43 °C.
!
WARNING Injury
The appliance may be used by children aged 8 and up and
persons with reduced physical, sensory or mental capa-
bilities 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
If there is a radio or police announcement ordering win-
dows and doors to be kept closed, simply select fan stage
"0" (= fan off) for several hours.
The programming unit must be activated if the appliance
has been out of operation for a long time:
fHold down MENU for five seconds.
fIn the case of you having already navigated through
the menu tree, pressing MENU will return you to
the default display. If necessary you may have to
press menu several times.
fSlide your finger along the scroll wheel until you
reach the FAN STAGES entry.
fPress OK.
fPress OK again to adjust the parameter UNSCHED-
ULED VENT.
fSet parameter UNSCHEDULED VENT. to 0, by slid-
ing your finger anti-clockwise over the scroll wheel.
fConfirm with OK.
fSet parameter UNSCHED. VENT TIME 0 to a suit-
able value.
Note
Do not change any system-specific settings at the control
unit. Your contractor has set the control unit to match
the local conditions for your building and your individual
requirements. The system-specific parameters are pro-
tected by a code to prevent unintentional modifications.
The parameters that serve to adapt the appliance to your
personal requirements are not protected by a code.
2.3 CE designation
The CE designation shows that the appliance meets all essential
requirements according to the:
- Electromagnetic Compatibility Directive
- Low Voltage Directive
2.4 Test symbols
See type plate on the appliance.
3. Appliance description
Heat is recovered from the extract air by means of a highly effi-
cient cross-countercurrent heat exchanger and an air|water heat
pump. In addition, heat is extracted from the outdoor air. This
energy, efficiently made available by the heat pump, is channelled
to the central heating or DHW system. The cooled air is discharged
outdoors.
When the temperature is very low, or when there is a very high
heat demand, the appliance covers the residual heat demand by
means of an integral electric emergency/booster heater. If the
dual mode point is undershot in mono mode operation, the elec-
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tric emergency/booster heater is activated to safeguard heating
operation and the provision of high DHW temperatures. In mono
energetic mode, the electric emergency/booster heater is activat-
ed as a booster heater.
The appliance is regulated by an weather-compensated control
unit.
Cooling function
This appliance is suitable for cooling. This is achieved by extracting
heat from the heating system through a reversal of the heat pump
circuit. The heat extracted from the heating water is transferred
by the evaporator to the outdoor air.
The cooling function requires an external programming unit.
The "Cooling" menu will be shown if an external "FES Comfort"
programming unit is connected to the CAN BUS (the control unit
can supply up to two programming units) and recognised by the
control unit.
Heat metering
The appliance is equipped with an integral heat meter. The amount
of transferred heat is shown under [MENU/ACTUAL VALUES].
Solar backup
A solar thermal system can be connected via a solar heat exchang-
er. Solar backup can be provided both in central heating mode
and DHW mode. A differential temperature controller for the solar
thermal system is integrated in the control unit of the LWZSOL.
A heat exchanger built into the outdoor air flow heats the outdoor
air for domestic ventilation. If sufficient solar heat is available, the
outside air is preheated indirectly by solar energy.
4. Operation
4.1 Controls
WEDNESDAY 10 JUN 09 10:23 H
OUTSIDE TEMPERATURE
DHW TEMPERATURE
27.0 °C
35.0 °C
28.0 °C
FLOW TEMPERATURE
DAY M ODE
26�04�01�0309
The programming unit enables you to change parameters and
to obtain information on the appliance operation. The appliance
can also be controlled when no programming unit is connected
or the connected one is faulty. The programming unit comprises
the scroll wheel, two key arrays and a display above. The display
shows the current appliance status and provides messages as well
as information. The programming unit functions are accessed via
a menu tree. A graphic display using flow diagrams (see "Oper-
ation /Overview menu") provides an overview of the menu tree.
With the scroll wheel, you can navigate the menu structure and
change values.
4.1.1 Display
26�04�01�0292
WEDNESDAY 10 JUN 09 10:23 H
OUTSIDE TEMPERATURE
DHW TEMPERATURE
27.0 °C
35.0 °C
28.0 °C
FLOW TEMPERATURE
DAY MODE
1
2
3
4
1 Date and time
2 Favourites
3 Operating mode
4 Appliance status symbols
The start screen is divided into four sections by horizontal lines.
The time and date are at the top. In the field below this, your
favourites are displayed. Here, you can check up to three appli-
ance parameters at any time(see chapter "Favourites"). When you
are in the menu, the favourites display is no longer shown. The
third section provides information about the current operating
mode and serves to control further functions, such as quick access,
function block. In the fourth section, at the bottom edge of the
display, pictorial symbols provide information about the current
system status.
You can adjust the contrast of the display and select the language
of the display texts in the COMMISSIONING menu.
4.2 Picture symbols in the display
At the lower edge of the display, symbols provide information
about the current appliance operating status. Up to eight symbols
can be displayed at once.
Filter change, top:
The extract air filter is contaminated. Please change the
extract air filter.
Filter change, bottom:
The supply air filter is contaminated. Please change the
supply air filter.
Filter change, top and bottom:
The filter change service intervals of the extract air and
the supply air filters have expired or the filters have be-
come contaminated prematurely. Please change the ex-
tract air and supply air filters.
Electric emergency/booster heater:
The electric emergency/booster heater has started up.
This occurs, for example, when the outside temperature
has fallen below the dual mode point.
Cooling:
The cooling symbol is displayed when the appliance is
in heating mode.
Heating:
The heating symbol is displayed when the appliance is
in heating mode.
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DHW heating:
This symbol tells you that the system is heating DHW.
Compressor: The compressor symbol signals that the
compressor is running.
Evaporator defrost: The evaporator is defrosting.
Switching program enabled: If a switching program is
enabled, this symbol is displayed.
Service:
A service is required. Please contact your qualified con-
tractor. For further information see chapter "Operation/
Remote messages".
Ventilation stage: For a limited period the appliance op-
erates with a modified ventilation stage.
Heating circuit pump: The pump symbol is displayed
when a heating circuit pump is running.
Heat-up:
This symbol shows when the drying heating program
runs.
4.3 Activating
The user interface is blocked to protect the appliance from acci-
dental incorrect adjustments.
WEDNESDAY 10 JUN 09 10:23 H
OUTSIDE TEMPERATURE
DHW TEMPERATURE
14.0 °C
35.0 °C
18.0 °CFLOW TEMPERATURE
DAY MODE
To activate please
for 5 seconds
press MENU.
26�04�01�0292
fTouch the menu field for five seconds to enable the user
interface.
If the scroll wheel and keys/fields are not used for 20 minutes, the
programming unit is locked again. With the function block, you
can block the user interface for 60 seconds.
4.4 Scroll wheel
26�04�01�0329
The scroll wheel consists of a touch-sensitive sensor. There is a
key to the left and another to the right of it. With the wheel, you
can control and check all the required appliance functions.
Note Sensor responsiveness
If you have gloves on, have wet hands or the program-
ming unit is damp, this impedes the recognition of your
touch and the execution of the action you require.
In the COMMISSIONING menu, your qualified contractor can set
the sensitivity to touch using the parameter QT SENSITIVITY.
4.4.1 Selection indicator
As you move through the menu and parameter levels, the selection
indicator shows your current position. Either a dark background
appears (see diagram in chapter "Time / Date"), or the current
list entry is highlighted by two lines, one above and one below.
4.4.2 Circular movement
Brush a finger clockwise along the recessed scroll wheel, and the
highlighting field moves through the list of parameters either to
the right, or downwards if the parameters are arranged vertically.
With an anti-clockwise rotation, the highlighter moves to the left
or upwards.
Alongside navigation within the menu structure, the scroll wheel is
also used to set parameters. If you make a clockwise rotation, the
value is raised. With a circular movement anti-clockwise, values
are reduced.
Faster circular motions increase the step magnitude when chang-
ing parameters. Your qualified contractor can determine at what
speed of rotation the step magnitude changes, in the COMMIS-
SIONING menu using parameter QT BOOST INC.
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4.4.3 The menu key
The menu key has two functions. If you are on the default screen,
press
MENU to enter the second level of the menu structure.
There, you have access to the appliance setting options, such as
the input of switching time programs.
If you are not in the highest menu level, press the menu key to
go back one level.
Note
In the following sections of this document, the abbre-
viation MENU means you should press the MENU key.
Note
Press the keys only briefly to initiate the required action.
If you touch the menu and OK keys for too long, the pro-
gramming unit will not respond.
4.4.4 The OK key
With one touch of the OK key, you confirm the selection of the
menu entry highlighted. This brings you into the menu tree on
the next menu level. If you are already on the parameter level, OK
saves the currently set parameter.
Example 1: In the third area on the start screen, the currently
enabled operating mode is displayed, for example manual mode.
If you want to change to automatic mode, make a rotation until
you reach the required mode. Then confirm your selection by
touching the OK key. Only now does the appliance change to the
new operating mode.
Example
2: The OK key is used to confirm parameter entries. The
newly set value is not saved until you press OK.
Note
In the following sections of this document, the abbrevia-
tion OK means you should touch the OK key.
4.4.5 Acoustic signals
A click sound accompanies every user action. Example: A click is
heard every time OK and MENU are pressed. Furthermore, the
clicking accompanies every step along a menu list activated by a
rotation.
A brief beep is emitted when something is successfully selected,
enabled or saved. Example: A high beep tone can be heard when
you confirm a parameter entry with OK. So, a high beep tone
signifies something positive.
On the other hand, a dull beep is heard when something is can-
celled or cannot be carried out. Example: You try and exceed the
defaulted limits when setting parameters or you are trying to
select a fourth favourite.
4.5 Menu structure
After enabling the programming unit, you can still see the start
screen. However, you now have two setting options:
- You can select other operating modes with the scroll wheel
or
- Press MENU to jump to level two, to continue navigating
from there to a special appliance parameter.
The programming menu is split over five levels:
Level 1 Default image and setting operating modes
Level 2 Menu
Level 3 Submenu or parameters
Level 4 Submenu or parameters
Level 5 Parameter
If you are on a menu level where you have the choice between
different parameters, the value of the parameter is shown as a
preview in addition to the current list position.
You reach levels three and four with OK.
4.5.1 Back
At every menu level, you will see the entry BACK. If you select
BACK, you reach the next level up in the menu. Alternatively, you
reach this with MENU.
If, for longer than five minutes, there is no user action, no rotation
or MENU or OK are not pressed, the programming unit display
automatically jumps back to the default screen.
Parameter changes made before this that had not yet been con-
firmed with OK are lost. The parameters retain the values previ-
ously saved.
4.5.2 Contractor access
To prevent incorrect adjustments, some appliance parameters may
only be changed by qualified contractors. These parameters are
protected and can only be changed after entering a code.
0* **
26�04�01�0293
Enter code
SETTINGS
VENTILATIONVENTILATION
FAN STAGE VENT. AIR
4.6 Entering parameters
Parameters are changed by scrolling with the scroll wheel. To save
the new value, press OK.
If you want to cancel the entry, press MENU. The parameter re-
tains the previously saved value.
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OPERATION
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Example 1
To enter set temperatures, a number surrounded by a circle ap-
pears on the display. This indicates that you can change the value
by turning the scroll wheel.
+
21.7
-
SETTINGS
ROOM TEMPERATURES
Room temperature day
°C
26�04�01�0347
HEATING HC1
ROOM TEMPERATURE DAY
Example 2
To set holiday dates, a calendar page for the selected month ap-
pears.
Day Month Year Hour Minute
26�04�01�0300
SETTINGS
HOLI DAYS- PA RT YHOLI DAYS
HOLIDAYS BEGINNING
MON TUE WED THU FRI SAT SUN
02 03 04 05 06 07 08
09 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
01
30
Turning the scroll wheel displays the highlighter that you can then
move to the required date..
Example 3
Some parameters are selected via highlighted boxes (see next
diagram). The positions where the box is highlighted, i.e. coloured
in black, are active. One example is setting up favourites. With
OK you can highlight the box, or remove it if the item was already
highlighted. For favourites, up to three highlighted list entries can
be selected in this way.
ACTUAL VALUES
SET ROOM TEMPERATURE 2
RELATIVE HUMIDITY 2
DHW TEMPERATURE
DHW SET TEMPERATURE
34.2 °C
26�04�01�0298
4.7 Appliance functions
The appliance offers a range of functions that you can set with
the programming unit. There, you find the following parame-
ters: ROOM TEMPERATURES, COOLING, Ventilation, DHW,
SOLAR (only for LWZ SOL), TIME / DATE, HOLIDAYS -PART Y,
ACTUAL VALUES, HEATING and PROGRAMS. The parameters
CONTRACTOR LOGIN, CONTRACTOR and COMMISSIONING
are not designed for daily use of the appliance.
Only contractors can make settings here. The individual functions
are explained below.
26�04�01�0294
ROOM TEMPERATURES
SETTINGS
COOLING
VENTILATION
DHW
SOLAR
4.7.1 Room temperatures
[MENU]
Two heating circuits can be operated with this appliance. For ex-
ample, each dwelling in a two-family house could be supplied
from its own heating circuit.
Enter submenu HEATING HC1 or COOLING HC1 for settings
applicable to the first heating circuit. Select the required set room
temperature for day, setback and standby modes.
Example: Move the selection field to Room temp. standby and
press OK. You reach parameter settings. The currently set value
is displayed. If you set the value to 10, the appliance ensures a
room temperature of 10°C when it is running in standby mode.
MANUAL SET HC [MENU / ROOM TEMPERATURES / HEATING
HC1]: Under this parameter, set the heating flow temperature for
manual mode.
ROOM TEMPERATURE [MENU / ROOM TEMPERATURES / HEAT-
ING HC1]: This parameter, the display of the current value, is only
shown if a room temperature sensor is connected.
Set the values for HEATING HC2 accordingly.
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4.7.2 Cooling
Cooling is only possible in conjunction with a buffer cylinder or
low loss header. Parameter COOLING MODE must be set to ON.
Refer to your authorised contractor for the required adjustments.
Cooling is enabled when the appliance is in summer mode and the
outside temperature exceeds the set room temperature for heating
(parameter ROOM TEMPERATURE DAY in menu ROOM TEM-
PERATURES/ HEATING HC1 or HEATING HC2) for 2 hours by 3 K.
If the room temperature is then higher by the value set under
parameter room temp. hysteresis than the set room temperature
for cooling (parameter ROOM TEMPERATURE DAY in menu
ROOM TEMPERATURES / COOLING HC1 or COOLING HC2), then the
system prepares for cooling. The display shows a snowflake. The
circulation pump starts, the 3-way diverter valve changes over to
the heating circuit and the "cooling" output is activated in order
to, for example, open the thermostatic valves in the rooms to be
cooled.
By selecting a room temperature you can influence when the ap-
pliances starts its cooling operation.
Cooling mode with FESComfort
The digital remote control FESComfort is equipped with a temper-
ature sensor as well as a humidity sensor that is used to monitor
the dew point in area heating systems (such as underfloor heating
systems, wall area heating systems, chilled ceilings).
Active cooling
When parameter COOLING MODE is active, the compressor
switches the defrost valve on if the heating circuit temperature
exceeds the selected set heating circuit temperature.
Cooling and DHW heating
Cooling mode is interrupted as soon as a DHW demand is issued,
and DHW heating commences.
Cooling and solar (LWZSOL)
Under parameter SOLAR qualified contractors can use parameter
PRIORITY SOLAR to select the priority for cooling operation if a
solar thermal system is connected. Possible settings are "Priority
solar", "Priority cooling" and the time-controlled setting via "Prior-
ity cooling time". This programs the period for cooling. If "Priority
solar" has been selected, cooling will not be enabled for as long
a the solar starting conditions are met and the maximum system
temperatures have not been reached. With "Priority cooling", the
functions "Solar overload" and "Collector protection" are disabled.
The solar start conditions are checked as soon as cooling ends.
fEnable cooling mode for the required heating circuits by set-
ting parameter COOLING MODE (OFF/ON).
4.7.3 Ventilation
Here, you can set the parameters for the centralised ventilation of
your home. The menu consists of four subparameters. As a user
however, you can only alter the PARAMETER area. Items VEN-
TILATION, OVEN / FIREPLACE, AIR / AIR HE and SERVICE
are reserved for qualified contractors.
In the submenu PARAMETER [MENU/VENTILATION] you can set
the fan stages for day, setback, standby and manual modes, as
well as the party program. The fans can run in three different
stages. Therefore the adjustable values available for each are
0(off), 1, 2, or 3.
Normally, the appliance controls when and for how long to venti-
late. However, via quick access VENTILATION STAGES you can
run ventilation instantly.
+
05
-
Unsched. vent time Stage 1
26�04�01�0295
SETTINGS
VENTILATIONPARAMETER
TIME / DATE
Under Unsched.vent time Stage 1 [MENU/VENTILATION] deter-
mine for how many minutes the fan should run, if you set the
appliance to stage 1 via parameter VENTILATION STAGES. You
can set values between 0 and 1000 minutes in five-minute steps.
Specify the ventilation times for stages 0, 2 and 3 accordingly.
The selected ventilation stage will not be enabled for 20seconds.
Quick ventilation with external pushbutton
With an external pushbutton that can be installed on site, you
can set ventilation immediately to stage3. Ventilation runs with
stage 3 and will only switch off after the time set under parameter
Unsched. vent time. Stage 3.
Humidity protection (stage 0)
The control unit includes a humidity protection ventilation func-
tion. This is provided to protect against humidity damage, if ven-
tilation is not required. This may be the case, for example, in the
case of prolonged absence due to holidays spent away from home.
For this, in menu VENTILATION/PARAMETER set the Humidity pro-
tection parameter to ON. The humidity protection ventilation is
activated after a pause of 24 hours. Ventilation is inactive prior to
the expiry of the 24 hour period.
Ventilation starts if the relative humidity inside the room exceeds
a limit whilst ventilation is switched off (stage 0). Ventilation is
switched off again is the limit is undershot by more than the se-
lected hysteresis. The limit is dependent on the outside temper-
ature.
fPlease consult your qualified contractor.
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Fan output correction (stage 1/2/3) subject to humidity
For output stages 1, 2 and 3, the qualified contractor can activate a
correction subject to humidity. This is made subject to the relative
humidity in the room. At low levels of relative humidity, such as
in winter, for example, the air flow rate will be reduced subject to
the output reduction parameter. This counteracts excessive drying
out. In summer, the humidity-dependent fan output correction can
reduce excessive humidity levels in rooms.
fPlease consult your qualified contractor.
4.7.4 Service
RUNTIME FILTER: This parameter indicates when the last filter
reset was carried out.
RESET FILTER: This parameter enables you to carry out a filter
reset by selecting "On".
4.7.5 DHW
Select the set DHW temperatures here. Enter the values for day,
setback, standby and manual modes. Subject to operating mode,
the temperature in the DHW cylinder is brought to the correspond-
ing set value. The current water temperature in the cylinder is
shown under DHW TEMPERATURE.
The settings in the PARAMETER submenu are reserved for qual-
ified contractors.
4.7.6 Solar
Note
The SOLAR parameter is only displayed if your appliance
is a model from the SOL series.
If you have connected a solar thermal system, you will find all the
parameters here which have to be specified for solar mode. In
solar mode, the appliance is backed up by the solar heat exchang-
er/indirect coil for DHW heating and central heating.
SOLAR ACTIVATION [MENU/SOLAR, P80]: If you want to enable
solar mode, set the value in parameter SOLAR ACTIVATION to 1.
TEMP. DIFFERENTIAL [MENU/SOLAR, P81]: With the aid of this
parameter, also known as solar differential temperature, you de-
fine a temperature that is used as the threshold for starting and
stopping the solar circuit pump.
The solar circuit pump starts if the collector temperature is higher
than the return temperature by the TEMP. DIFFERENTIAL +
SOLAR HYSTERESIS. The solar circuit pump stops if the collec-
tor temperature is only TEMP. DIFFERENTIAL - SOLAR HYS-
TERESIS above the return temperature. The parameter SOLAR
HYSTERESIS is set by the qualified contractor.
Ensure that the stop point is not below the return temperature,
which can be the case if the hysteresis has been set above the
temperature differential. The greater the value of the solar differ-
ential temperature, the later the solar circuit pump starts when
the sun comes out. At the same time, the risk of heat loss from
the cylinder is reduced. If heat were lost from the cylinder, the
thermal energy would flow in the opposite direction, i.e. water
that had already been heated would be cooled down because
insolation was still too low.
DHW COMPRESSOR DELAY (delay compressor DHW)
[MENU/SOLAR, P82]
When the solar circuit pump runs, the compressor is blocked for
the period defined here. DHW is only heated with solar energy
during this time.
DHW SOLAR TEMP. (DHW temperature solar)
[MENU/SOLAR, P83]
If the DHW cylinder has been heated up, the set flow temperature
has been reached and the collector temperature remains high,
the DHW cylinder can be heated up to a higher temperature to
store solar energy. Set the temperature to which the DHW cylinder
should be heated here.
WARNING Burns
Parameter DHW SOLAR TEMP. should only be set high-
er than 60°C if suitable measures have been taken to
provide protection against scalding. There is a risk of
scalding at outlet temperatures in excess of 43 °C.
If you want to use the solar function, your contractor should set
the following values:
MINIMUM CYCLES (P54) 1
MAXIMUM CYCLES (P55) ≥50
OUTSIDE TEMP MAX CYC (P56) 0 °C
OUTSIDE TEMP MIN CYC (P57) 25 °C
4.7.7 Time/date
In the TIME / DATE menu, enter the current time and date, so the
system can start the time programs you enter at the correct time.
Entering the date
15. 09 08:23
Day Month Year Hour Minute
Jun
26�04�01�0296
SETTINGS
TIME TIME / DATE
Position the selection indicator over the position "Year" and con-
firm with OK. Set the current year with the scroll wheel and con-
firm with OK. Set the month accordingly. To help you set the day,
a calendar page appears. Move the highlighter to the required day
with the scroll wheel. The new value is saved when you confirm
with OK.
Summertime: Under the parameter SUMMERTIME MANUAL,
you can set the period for summertime. Alternatively you can
select the summertime specified at the factory. For this, set the
parameter SUMMERTIME AUTOMATIC to "ON".
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4.7.8 HOLIDAY/PARTY
Holidays
During the holidays, if nobody is in the house, central heating,
DHW and ventilation are not required in their full scope. All set
temperatures are set to match the set values of the standby func-
tion. Define the first and last days of the holiday. The setting is
made as described under time/date. At the end of the holiday, the
appliance runs according to the set programs again.
Party
Under this parameter you can extend day mode for several hours.
Enter the start and end time of your party. Times can be set that
go beyond the end of the day the party starts.
4.7.9 Actual values
SETTINGS
26�04�01�0298
SET ROOM TEMPERATURE 2
RELATIVE HUMIDITY 2
DHW TEMPERATURE
DHW SET TEMPERATURE
34.2 °C
26�04�01�0298
ACTUAL VALUES
You can check the following actual and set values:
- OUTSIDE TEMPERATURE
- ROOM TEMPERATURE HC1
- SET ROOM TEMPERATURE HC1
- RELATIVE HUMIDITY HC1
- DEW POINT TEMP. HC1
- ROOM TEMPERATURE HC2: The room temperature of the sec-
ond heating circuit will only be displayed if a room tempera-
ture sensor or an external programming unit is connected.
- SET ROOM TEMPERATURE HC2
- RELATIVE HUMIDITY HC2
- DEW POINT TEMP. HC2
- DHW TEMPERATURE shows the current cylinder water
temperature
- DHW SET TEMPERATURE
- SET VALUE HC 1: Default temperature for the heating circuit
- ACTUAL VALUE HC1 (DHW heating temperature): Heating
circuit temperature, calculated from the flow and return
temperatures, weighted with the value set under FLOW
PROPORTION. Whilst DHW is being heated, this parameter
indicates the temperature with which the DHW cylinder is
being heated.
- SET VALUE HC 2
- ACTUAL VALUE HC 2
- CONDENSER TEMP.: In the condenser, the refrigerant is lique-
fied at high pressure. This releases heat which is transferred
to the heating medium.
- EVAPORATOR TEMP.: In the evaporator, the refrigerant is
evaporated at low pressure. As this happens, heat is extract-
ed from the air flow.
- FLOW TEMP.: The flow is the heating pipework between heat
pump and heat consumer (radiator or indirect coil inside
the DHW cylinder). Here you can see the temperature of the
water in this pipe section.
- RETURN TEMP.:The return is the heating pipework between
heat consumer and the heat pump. Here you can see the
temperature of the water in this pipe section.
- COLLECTOR TEMP.:Temperature of the solar collector
- HOT GAS TEMPERATURE: This value specifies the tempera-
ture of the gaseous refrigerant at the condenser inlet.
-SUPPLY AIR SET: This value indicates the percentage of max-
imum control voltage with which the supply air fan operates.
Supply air is the heated outdoor air that is blown into the
ventilation area (living room, bedroom, nursery).
-SUPPLY AIR ACTUAL: INDICATES THE CURRENT SUPPLY AIR
FAN SPEED.
-EXTRACT AIR SET: This value indicates the percentage of
maximum control voltage with which the extract air fan op-
erates. Extract air is the stale air that is extracted from the
extract air area (bathroom, kitchen, WC).
-EXTRACT AIR ACTUAL: current speed of the extract air fan
-EXHAUST AIR SET: Set flow rate of the heat pump fan
-EXHAUST AIR ACTUAL: current speed of the exhaust air fan
- DUAL MODE POINT
- HEATING STAGE
-EVAPORATOR DEFROST: If value 1 appears, this means the
evaporator is currently being defrosted.
-AIR/AIR HEAT EX DEFR: If the value ON appears, you can
recognise that the air/air heat exchanger is currently being
defrosted.
- HEAT METER HTG DAY: Amount of heat that was transferred
by the heat pump to the heating circuit on this day.
- HEAT METER HTG TTL: Amount of heat that has been trans-
ferred by the heat pump to the heating circuit since the appli-
ance was commissioned.
- Heat meter DHW day: Amount of heat that was transferred by
the heat pump to the DHW cylinder on this day.
- HEAT METER DHW TTL: Amount of heat that has been trans-
ferred by the heat pump to the DHW cylinder since the appli-
ance was commissioned.
- HEAT M BOOST HTG TTL: Amount of heat that has been trans-
ferred by the electric emergency/booster heater to the heat-
ing circuit since the appliance was commissioned.
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- HEAT M BOOST DHW TTL: Amount of heat that has been
transferred by the electric emergency/booster heater to the
DHW cylinder since the appliance was commissioned.
- HEAT M RECOVERY DAY: Amount of heat that was recovered
from the ventilation system on this day.
- HEAT M RECOVERY TTL: Amount of heat that has been re-
covered from the ventilation system since the appliance was
commissioned.
- HM SOLAR HTG DAY: Amount of heat that was transferred by
the solar thermal system to the heating circuit on this day.
- HM SOLAR HTG TOTAL: Amount of heat that has been trans-
ferred by the solar thermal system to the heating circuit since
the appliance was commissioned.
- HM SOLAR DHW DAY: Amount of heat that was transferred by
the solar thermal system to the DHW cylinder on this day.
- HM SOLAR DHW TOTAL: Amount of heat that has been trans-
ferred by the solar thermal system to the DHW cylinder since
the appliance was commissioned.
- HM COOLING TOTAL: Amount of heat absorbed by the appli-
ance via its evaporator from the rooms.
- PRESSURE HTG CIRC: This parameter indicates the pressure
inside the heating circuit.
- WATER FLOW RATE
4.7.10 Heating
This parameter enables you to set one heating curve each for
heating circuits 1 and 2. The room temperature will only remain
constant irrespective of the outside temperature if the correct
heating curve has been selected for the relevant type of building.
Selecting the correct heating curve is therefore vitally important.
The more precisely the heating curve is set, the more economically
the appliance works. Try therefore to optimise your heating curve.
Reduce the current heating curve until the flow temperature is
just sufficient for heating. The target is as flat a heating curve as
possible.
fFully open thermostatic valves (remove head) in a lead room,
for example living room or bathroom.
fAt different outside temperatures, adjust the heating curve so
the required temperature is set in the lead room (living room
or bathroom). Now the room temperature in these rooms is
controlled with the heating curve (see next diagram).
Standard values to begin with:
Parameter Underfloor
heating system
Radiator heat-
ing system
GRADIENT (P13) 0.4 0.8
LOW END (P14) 3 K 10 K
ROOM TEMPERATURE DAY
(P01)
20 °C 20 °C
1
3
2
4
5
Y
X
6
26�04�01�0297
7
1 Gradient influence
Gradient = Y/X
= Heating circuit temperature change/Outside temperature
change
2 Low end offset influence
3 Heating curve
4 Set room temperature influence
5 Low end
6 Outside temperature in °C
7 Set heating circuit temperatures in °C
HEATING CURVE gradient
The gradient [MENU/HEATING] determines the extent to which a
change in the outside temperature effects a rise in the flow tem-
perature. Typical problem: Increase the gradient if the room tem-
perature is too low at low outside temperatures (approx. -10°C).
Low end offset of the heating curve
By changing the parameter LOW END, you effect a parallel offset
of the heating curve. Typical applications are explained in chapter
"Troubleshooting".
ROOM INFLUENCE
If you want to influence the heating curve through the room tem-
perature, install an auxiliary programming unit "FESComfort" in
your home. For parameter ROOM INFLUENCE [MENU/HEATING/
HC1 or HC2], enter a value >0. The heating curve is then changed
by this value (room temperature deviation * room influence *
heating curve gradient).
FLOW PROPORTION
Flow means the pipework that supplies heating water to the heat-
ing system. The return carries the cooled water from the heating
system to the heating system. With parameter FLOW PROPOR-
TION [MENU/HEATING], you determine whether your heating sys-
tem should function as a flow or return temperature-controlled
system.
Flow proportion Effect
0Heating system with return temperature control
100 Heating system with flow temperature control
50 Spread control (50% return and 50% flow control)
30 Spread control (70% return and 30% flow control)
80 Spread control (20% return and 80% flow control)
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Generally, values below 50 (recommendation:30) should be se-
lected for heating circuit 1 in order to restrict the influence of the
flow temperature. Particularly in spring and autumn, the flow
temperature is subject to naturally strong fluctuations because of
the heat pump being switched on and off. If these strong fluctua-
tions make it necessary, the booster stages would also be started,
although the heat pump alone would be capable of covering the
current heat demand.
No flow proportion is scanned for heating circuit2. Always enter
100 here, as the mixer circuit does not have its own return sensor.
MIN. SET VALUE/ MAX. SET VALUE
With these parameters, you set the minimum and maximum set
temperatures for the heating circuit. These values limit the heat-
ing curve in the upper and lower regions. Even if the calculated
heating curve would go beyond these limits, it is limited to these
set values.
HEATING CURVE
Under this parameter, you can display the heating curves for both
heating circuits.
60
40
50
30
20
10
00
-25 -20 -15 -10 -05 00 05 10 15 20 25
26�04�01�0348
SETTINGS
HEATINGHEATING CURVE HC1
HEATING CURVE
THK °C
TA
°C
Note that parameter FLOW PROPORTION has an influence on
heating curve HC1. This means the heating curve is distinctly lower
than the flow temperature curve. (see examples 1 and 2).
The heating curve for HC2 is a flow temperature curve.
Example 1 (heating curve 55/40)
Heating curve 55/40 for a radiator heating system (set room tem-
perature 20°C, low end 5°C, gradient 0.65, flow proportion 30%,
design temperature -15°C)
0
10
20
30
40
50
60
-15 -10 -5 0 5 10 15 20
1
3
2
26�04�01�0379
X Outside temperature [°C]
Y Heating temperature [°C]
1 Flow
2 Heating curve
3 Return
Example 2 (heating curve 35/28)
Heating curve 35/28 for underfloor heating (set room temperature
20°C, low end 1°C, gradient 0.3, flow proportion 30%, design
temperature -15°C)
0
5
10
15
20
25
30
35
40
-15 -10 -5 0 5 10 15 20
1
3
2
26�04�01�0380
X Outside temperature [°C]
Y Heating temperature [°C]
1 Flow
2 Heating curve
3 Return
If you have set the heating curve successfully, set the thermostatic
valves to the required temperature.
Note
Never reduce the temperature in the entire building by
closing all thermostatic valves. Instead, use the night pro-
grams or select the set room temperature with parameter
HOTTER / COLDER.
4.7.11 Programs
If automatic mode is set, this is where you define the time pro-
grams that control the appliance. There are time programs for the
functions central heating, DHW heating and ventilation.
Heating programs: You can set individual heating programs for
heating circuits 1 and 2. This determines when and how often
the appliance should operate in day mode. At all other times, the
appliance operates in setback mode. You can select the set values
for day and setback mode under parameter ROOM TEMPERA-
TURES. Below is an explanation of how to define a time program.
First, select the days on which you want to enable the HEATING
function:
+
-
26�04�01�0301
Monday
Mon
SETTINGS
PROGRAMS
HEATING PROGRAM HC1
- on individual days (MONDAY, ..., SUNDAY)
- from Monday to Friday (MON - FRI)
- on Saturday and Sunday (SAT - SUN)
- throughout the whole week (MON - SUN)
Monday is initially offered.
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fScroll with the scroll wheel to select another day or group of
days.
fConfirm your selection with OK.
You can now set three switching time pairs. The three switching
time pairs are shown on the display, to the right of the clock. A
switching time pair comprises the start time and end point, at
which the appliance returns to its previous state.
07:00 - 20:00
- -:- - - - -:- -
- -:- - - - -:- -
26�04�01�0299
MONDAY
SETTINGS
PROGRAMS
HEATING PROGRAM HC1
In this example, only one switching time pair has so far been
programmed. For switching time pairs 2 and 3, short dashes are
displayed instead of times. These switching time pairs are still
empty. If you select one of the free switching times pairs with OK,
you reach the area where you can set the associated start and end
times. Press OK and the display shown below appears. Set the
required time with the scroll wheel.
End
- -:- -
SETTINGS
PROGRAMS
SETTINGS
- -:- -
TIME TIME
Start
26�04�01�0302
Times can be entered in intervals of 15 minutes. You can set 16:30
or 16:45 h, but not 16:37 h. Confirm your entry with OK.
Periods around midnight
Assume, for example, you want heating mode to be enabled from
22:00 h for four hours every Wednesday evening. This means the
period does not expire until the next day, Thursday, at 02:00 h.
However, since the day ends at 00:00h, two switching time pairs
are necessary for the required program. First, program the period
22:00 to 00:00 h for Wednesday, then 00:00 to 02:00 h for Thursday.
Deleting a switching times pair
Select the pair of switching times you want to delete. Go to the
start time change. Turn the scroll wheel to reduce the time. If you
reach 00:00 and continue to make a rotation, the pair of switch-
ing times is removed. The previously shown display appears, i.e.
dashes instead of numbers. Confirm again with OK.
DHW PROGRAM [MENU/PROGRAMS]: Here, you can set the pe-
riods when DHW is heated with reference to the set day tempera-
tures. In the other phases, the set night temperatures are followed.
The times are set as for the heating programs. You can select the
set values for day and night mode as described in the DHW chapter.
Example: You want to heat up DHW daily at two different times,
i.e. from 22:00 h until 05:00 h the following day, and then again
from 08:00 h until 11:00 h. Since the day begins at 00:00 h, begin
programming at 00:00 h. The first pair of switching times runs
from 00:00 until 05:00 h. The second pair of switching times starts
at 08:00 and ends at 11:00 h. The third switching time pair runs
from 22:00h until 24:00h.
The pairs of switching times should be selected so that the DHW
cylinder can be completely heated up between the start and stop
times (at least 3 hours).
FAN PROGRAM [MENU/PROGRAMS]: The setting is made as for
the central heating and DHW programs. Select the set fan val-
ues in accordance with chapter "Operation / Appliance functions
/ Ventilation".
4.7.12 Contractor login
Under [MENU/CONTRACTOR LOGIN], the contractor can enter and
change the numerical code. If the blocked parameters have been
enabled by entering the code, they can be blocked again under
RES. FOR CONTRACTOR.
4.7.13 Contractor level
Under [MENU/CONTRACTOR], only the display of runtimes and
some measures for troubleshooting are enabled for you as user.
The remaining parameters have a great influence on the appliance
control properties, and are therefore protected with a password
to prevent incorrect settings. As an appliance user, you can see
these parameters, but if you jump to the next menu level, you
meet the code check.
The submenu PROCESS VALUES includes actual values that
assist the qualified contractor in troubleshooting.
4.7.14 Commissioning
The majority of settings for commissioning must be carried out
by the contractor. As a user, you can make the following settings:
- LANGUAGE: Here you can select the language in which the
display texts are shown.
- TERMINAL ADDRESS: Every programming unit, either in-
tegrated in the appliance or fitted externally inside the build-
ing, requires a terminal address to facilitate communication.
- CONT R AST: Here you can set the display contrast.
- BOOSTER T ACTIVATE: With this parameter you determine
from what outside temperature onwards the electric emer-
gency/booster heater should be started.
- ROOM TEMP CORRECTION
- ROOM TEMP CORRECTION 2
- DHW PASTEURISATION TEMP.
- DRY HEATING PROGRAM: The dry heating program is not
necessary for daily requirements. The explanation can be
found in the installation instructions for qualified contractors.
- DELIVERED CONDITION: If you set this parameter to ON,
then all parameters will be reset to their factory settings.
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4.8 Selecting operating modes
When the start screen is activated, the current operating mode
is displayed. If you want to select another operating mode, scroll
with the scroll wheel. This takes you through the list of possible
operating modes. The current choice (list entry) is shown in the
shaded selection field. To change the appliance to this new oper-
ating mode, confirm with OK.
Setting the operating mode
WEDNESDAY 10 JUN 09 10:23 h
OUTSIDE TEMPERATURE
DHW TEMPERATURE
14.0 °C
35.0 °C
18.0 °CROOM TEMPERATURE
DAY MODE
26�04�01�0292
The appliance can operate in the following modes: Standby mode,
automatic mode, day mode, setback mode, DHW mode, manual
mode and emergency mode. In addition, you will find five further
setting options in this selection list: the favourites, the quick access
to ventilation stages, hotter/colder, direct line, and right at the end
of the list, the function block.
Since navigation to a new operating mode is always made from the
currently enabled mode, you may need to scroll in an anti-clock-
wise direction. All operating modes, apart from DHW mode, apply
to central heating, ventilation and DHW.
4.8.1 Standby mode
In standby mode, the appliance delivers the set standby values.
Generally, you will switch the appliance into minimum operation
with standby mode. The appliance runs in standby mode until
another operating mode is enabled.
4.8.2 Automatic mode
In automatic mode, the time programs set for central heating,
DHW and ventilation are implemented. Automatic mode is the
standard appliance setting. The heating flow temperature is reg-
ulated according to an weather-compensated heating curve. The
appliance runs in setback mode if no time programs are enabled.
4.8.3 Day mode
In day mode (generally while occupants are present in the house,
during the day), the heating system operates with the selected set
day values. Day mode does not influence DHW heating or venti-
lation.
4.8.4 Setback mode
The appliance activity is reduced in setback mode, for example
at night time, or during the day when nobody is at home. In set-
back mode, the heating system is operated with the selected set
night values. Setback mode does not influence DHW heating or
ventilation.
4.8.5 DHW mode
DHW mode is enabled in accordance with the set time programs.
For the current pair of switching times, the DHW set day value
is delivered. The central heating is switched off except for frost
protection. DHW operation does not influence ventilation.
4.8.6 Manual mode
If manual mode is enabled, the set values selected for manual
mode are delivered. In manual mode, the heating flow tempera-
ture is not influenced by the outside temperature.
4.8.7 Emergency operation
If emergency mode is enabled, the "Compressor" heating stage is
skipped. Heating is provided by the solar thermal system (if con-
nected) or the electric emergency/booster heater. The dual mode
point is not taken into consideration. Using the electric emergency/
booster heater on its own for long periods means high energy
costs.
If you activate emergency mode, the set room temperatures from
automatic mode are used. The switching programs from automatic
mode are also used.
4.9 Favourites, quick access, function block
As well as the operating modes, on the start screen you can also
select which parameters are always shown in the favourites list.
Additionally, you can influence the fan stage and temperature
via a quick link, jump straight to a parameter and enable the
function block.
4.9.1 Favourites
You reach the FAVOURITES function if you run through the list
of operating modes on the default screen with the scroll wheel.
Up to three parameters are constantly shown on the display when
the appliance is in operation. To select your favourites, navigate
to the required parameter. If the square at the end of the line is
not filled in, this parameter is not yet one of your favourites. Press
OK to change this. However, you can only select three favourites.
You may therefore have to disable one of your current favourites.
Press OK to disable.
4.9.2 Ventilation stages
With quick access VENTILATION STAGES, you reach the setting
area for the fan stage (see diagram below). Enter the required
value (0 to3) under UNSCHEDULED VENT. This setting is valid
for a limited time, which you set in neighbouring parameter UN-
SCHED. VENT TIME STAGE X. If you do not set a time, the
appliance adopts the saved parameter values.
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Quick access ventilation stages
26�04�01�0367
UNSCHED. VENT TIME STAGE 2
UNSCHEDULED VENT.
VENTILATION STAGES
02
!
WARNING Injury
If there is a radio or police announcement ordering win-
dows and doors to be kept closed, simply select fan stage
"0" (= fan off) for several hours.
The programming unit must be activated if the appliance
has been out of operation for a long time:
fHold down MENU for five seconds.
fIf you have already navigated through the menu
tree, pressing MENU will return you to the default
display. If necessary you may have to press menu
several times.
fSlide your finger along the scroll wheel until you
reach the FAN STAGES entry.
fPress OK.
fPress OK again to adjust the parameter UNSCHED-
ULED VENT.
fSet parameter UNSCHEDULED VENT. to 0, by slid-
ing your finger anti-clockwise over the scroll wheel.
fConfirm with OK.
fSet parameter UNSCHED. VENT TIME 0 to a suit-
able value.
4.9.3 HOTTER / COLDER
Here, you can change the set room temperatures for the heating
circuits and thereby raise or lower the heating curves.
4.9.4 DIRECT LINE
If you know the number of the required parameter (for example
P37), you can move straight there with the direct line.
fOn the default screen, turn the scroll wheel until keyword DI-
RECT LINE appears. Confirm with OK. Now select the num-
ber of the required parameter and confirm with OK.
You can select parameters 01 to 89. To make the direct line easier
to use, the parameter designations are displayed along with their
numbers.
4.9.5 FUNCTION BLOCK
The programming unit will be blocked for 60 seconds if you select
the FUNCTION BLOCK function. During this time, you can clean
the programming unit without accidentally changing the appliance
settings. A counter appears on the screen that shows the remain-
ing blocking time in seconds.
4.10 Fault message
If the appliance registers a fault, this is clearly displayed with the
message shown below.
!FAULT
CODE NO. 001
PLS INFORM CUST SERVICE
WEDNESDAY 10 JUN 09 16:27 h
26�04�01�0303
If more than one fault occurs, the most recent fault is always
shown. Please inform your contractor.
To see the usual default display, first enable the programming
unit by pressing "MENU" for 5seconds. The fault message is then
extended with a note requesting that you acknowledge the fault
by pressing OK for five seconds.
!FAULT
CODE NO. 001
PLS INFORM CUST SERVICE
TO ACCEPT PLS PRESS OK
FOR 5SECONDS
WEDNESDAY 10 JUN 09 16:27 h
26�04�01�0303
For qualified contractors, chapter "Fault messages" in the instal-
lation instructions provides an overview of possible faults.
4.10.1 Fault memory
[CONTRACTOR/FAULT SEARCH/FAULT MEMORY] The fault memory
is also accessible to you as a customer. There, you receive an
overview of the faults most recently registered by the appliance.
The fault memory contains the ten most recent fault messages.
However, only six can be displayed at a time on the display (see
diagram below). Turn the scroll wheel to access the other entries
in the fault memory.
26�04�01�0300
SETTINGS
CONTRACTORFAULT SEARCH
FAULT MEMORY
01. FAULT NO. 20 11:00 H 18 JUL 09
02. FAULT NO. 06 11:01 H 18. JUL 09
03. FAULT NO. 20 12:23 H18. JUL 09
04. FAULT NO. 06 12:24 H 18 JUL 09
05. FAULT NO. 20 12:34 H 18. JUL 09
06. FAULT NO. 06 12:35 H 18. JUL 09
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OPERATION
Operation
16 | LWZ 304-404 SOL www.stiebel-eltron.com
4.11 Operating modes overview
Here, you can see a graphic display of the operating mode se-
lection.
STANDBY
AUTOMATIC
DAY MODE
SETBACK MODE
DHW MODE
ROTATION
MANUAL MODE
EMERGENCY OPERATION
FAVOURITES
VENTILATION STAGES
HOTTER / COLDER
DIRECT LINE
FUNCTION BLOCK
START SCREEN
[-->4.8.1 ]
[-->4.8.2 ]
[-->4.8.3 ]
[-->4.8.4 ]
[-->4.8.5 ]
[-->4.8.6 ]
[-->4.8.7 ]
[-->4.9.1 ]
[-->4.9.2 ]
[-->4.9.3 ]
[-->4.9.4 ]
[-->4.9.5 ]
ROTATION
4.12 Menu overview
On the following pages, you will find the individual thematic blocks
of the menu structure.
ROOM TEMPERATURES
VENTILATION
DHW
SOLAR
TIME / DATE
MENU KEY
[-->4.7.1 ]
[-->4.7.3 ]
[-->4.7.5 ]
HOLIDAYS-PARTY
ACTUAL VALUES
HEATING
PROGRAMS
CONTRACTOR LOGIN Code required
CONTRACTOR
COMMISSIONING
BACK
START SCREEN
[-->4.7.6 ]
[-->4.7.7 ]
[-->4.7.8 ]
[-->4.7.9 ]
[-->4.7.10 ]
[-->4.7.11 ]
[-->4.7.12 ]
[-->4.7.13 ]
COOLING [-->4.7.2 ]
SERVICE [-->4.7.4 ]
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OPERATION
Operation
ENGLISH
www.stiebel-eltron.com LWZ 304-404 SOL | 17
HEATING HC2
ROOM TEMPERATURE DAY
ROOM TEMP. NIGHT
MANUAL SET HC
ROOM TEMP. STANDBY
ROOM TEMPERATURE
BACK
ROOM TEMPERATURES
HEATING HC1
BACK
as per Heating HC1
COOLING HC1
COOLING HC2
as per Heating HC1
as per Heating HC1
COOLING SYSTEM HC1
COOLING
COOLING MODE HC1
BACK
as per COOLING MODE HC1
OFF
NORMAL
BACK
COOLING SYSTEM HC2
PAR AMETER HC2
as per COOLING SYSTEM HC1
COOLING MODE HC2
FAN CONVECTORS
AREA HEATING SYSTEM
BACK
PAR AMETER HC1
HC TEMP. COOLING
HYST. FLOW TEMP.
BACK
HYST. ROOM TEMP.
HC TEMP. COOLING
HYST. ROOM TEMP.
BACK
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OPERATION
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18 | LWZ 304-404 SOL www.stiebel-eltron.com
VENTILATION
DAY STAGE
NIGHT STAGE
STANDBY STAGE
PART Y STAGE
MANUAL STAGE
UNSCHED. VENT TIME STAGE 0
UNSCHED. VENT TIME STAGE 2
UNSCHED. VENT TIME STAGE 1
UNSCHED. VENT TIME STAGE 3
PAR AMETER
BACK
VENTILATION
AIR/AIR HE
OVEN / FIREPLACE
CODE REQUIRED
CODE REQUIRED
BACK
CODE REQUIRED
HUMIDITY PROTECTION
HUM. THRESHOLD VALUE
SET HUMIDITY MIN
HUM. MASKING TIME
SET HUMIDITY MAX
SERVICE
DHW
DHW TEMPERATURES
SET DHW T DAY
SET DHW T NGT
DHW SET STANDBY
BACK
BACK
PAR AMETER Code required
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OPERATION
Operation
ENGLISH
www.stiebel-eltron.com LWZ 304-404 SOL | 19
SOLAR
SOLAR ACTIVATION
TEMP. DIFFERENTIAL
DHW COMPRESSOR DELAY
DHW SOLAR TEMP.
BACK
SOLAR HYSTERESIS
COLL. PROTECT TEMP
Code required
Code required
PRIORITY SOLAR
COOLING TIME
TIME / DATE
TIME / DATE
SUMMERTIME MANUAL
SUMMERTIME AUTOMATIC
BACK
HOLIDAYS-PARTY
HOLIDAYS
PARTY
HOLIDAY STARTS
HOLIDAY ENDS
BACK
PARTY BEGINNING
PARTY ENDING
BACK
BACK
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OPERATION
Operation
20 | LWZ 304-404 SOL www.stiebel-eltron.com
ACTUAL VALUES
OUTSIDE TEMPERATURE
ROOM TEMPERATURE HC1
SET ROOM TEMPERATURE HC1
RELATIVE HUMIDITY 1
ROOM TEMPERATURE HC2
SET ROOM TEMPERATURE HC2
RELATIVE HUMIDITY 2
HEAT M BOOST DHW TTL
HEAT M RECOVERY DAY
HEAT M RECOVERY TTL
BACK
HEATING CURVE HC1
HEATING CURVE HC2
BACK
GRADIENT
LOW END
ROOM INFLUENCE
MAX. SET VALUE
MIN. SET VALUE
HEATING CURVE
BACK
HEATING
FLOW PROPORTION
As per heating curve HC1,
but without parameter
"Flow proportion"
HTG FACTORY SETTINGS
HYSTERESES
Code required
Code required
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