20 Wiring diagrams
23
Centro-H-APB
Exhaust air element with servomotor and humidity
control.
For use in systems with variable volumetric flow
for individual apartments.
Standard operation – basic ventilation, automatic
switchover to full load if required (switch-on/
switch-off point adjustable). Demand-based vent-
ilation can also be switched on by light switch.
Control of the volumetric air flows within the vent-
ilation system with Centro pressure controller.
Speed control of the central fan automatically.
Once the exhaust air element has been installed,
the unit regulates to the current room humidity
(relative humidity). This humidity value is saved
as the first reference value. The reference value
does not have to be specified manually.
If the room humidity rises by 7 % within 2
minutes, the exhaust air element switches to full
load operation (demand-based ventilation). If the
relative humidity falls below the reference value
during operation, the newly established reference
value is saved.
The exhaust air element then automatically
switches back to base load operation. Demand-
based ventilation automatically or via a switch (for
example light switch).
After manual switch-on (light switch) the exhaust
air element runs with a start delay of approx. 1
minute with demand-based ventilation (full load).
After manual switch-off, the exhaust air element
continues to run in nominal load operation with an
overrun time of 15 minutes (valve closing time ap-
prox. 2 - 3 minutes).
When switch S1 is open, the exhaust air ele-
ment can start up automatically as a result of
high room humidity.