EN - 19
2
Operating principles
If multiple control units are
available in the home, then the
ventilation system applies the
highest ventilation setting.
Function: CO
2
The control unit is designed to monitor
indoor CO
2
levels. Depending on the indoor
CO
2
levels detected, the control unit sends
a signal to the ventilation system to provide
extra ventilation. If indoor CO
2
levels exceed
permitted CO
2
concentrations, then the
ventilation volume is gradually increased to
reduce indoor CO
2
levels. As soon as the
indoor CO
2
level is below the desired level
again, the ventilation volume is gradually
reduced to the normal ventilation volume.
Temporary function: 3-position switch
In some cases, in addition to automatically
controlling the ventilation system, the
control unit can also function as a temporary
3-position switch. In this case, the measured
CO
2
value has no effect on the ventilation.
The control unit then only transmits the
ventilation level set to the ventilation system.
The control unit automatically returns to the
CO
2
function after 12 hours.
3 Warranty and
certification
The manufacturer offers a warranty period
of 24 months after installation, up to a
maximum of 30 months after the date of
manufacture of the control unit. The warranty
will be voided if:
■
Installation has not been carried
out according to the applicable
regulations.
■
Defects are caused by incorrect
connection, incompetent use or
contamination of the CO2 sensor.
■
Parts not supplied by the
manufacturer have been used, or
repairs have been carried out by
unauthorised persons.
Dismantling and removal.
The costs of disassembly and assembly
on-site are not covered by the warranty
provisions. This also applies to normal wear
and tear. The manufacturer reserves the right
to modify the design and/or confi guration
of its products at any time without incurring
the obligation to modify previously delivered
products.
Make sure the unit is disposed of in an
environmentally friendly manner. Do not
dispose of the control unit with your
domestic waste.
CE marking
Zehnder hereby declares that the
control unit conforms to the essential
requirements and the other relevant
provisions of Directive 1999/5/EC.
