OPERATION
General information
www.stiebel-eltron.com LWZ304-404 SOL | 3
OPERATION
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
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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
Notes are bordered by horizontal lines above and below
the text. General information is identified by the adjacent
symbol.
Read these texts carefully.
Symbol Meaning
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
These symbols show you the software menu level (in
this example: level3).
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. It can be used safely
by untrained persons. The appliance can also be used in a non-do-
mestic 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.
2.2 General safety instructions
The appliance should only be operated once it is fully installed
and all safety equipment has been fitted.
Check the supply air and extract air filters regularly for contam-
ination.
Never adjust the setting of supply 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 discharged cold air can cause condensation to be
formed in the vicinity of the air discharge.
Ensure that no risk of slipping due to wet conditions
or ice formation occurs on adjacent footpaths and
driveways at low temperatures.
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