O P E R AT I N G A N D I N STA L L AT I O N I N ST R U CT I O N S SYST E M V E N T E C H LG 5 0 0 P
PAG E 1 9
7. Condensate tank with discharge fitting
Any condensate incurred in the heat
exchanger during operation is collected
via the condensate trough.
The condensate incurred is discharged
via the connected condensate drainage
system, which is routed via an
effective odour trap.
8. Frost protection heating with a PTC low
temperature preheater battery (optional)
In very cold outdoor air temperatures,
protects against freezing of condensate
in the heat exchanger. The outdoor air is
pre-heated, depending on the outdoor air
temperature, via the optional electrical
PTC lowtemperature pre-heater battery.
If a water battery or brine bat-
tery is used for frost protection
the heat exchanger, the battery
has to be protected in a suitable way
against freezing when there is frost.
9. Bypass valve with actuator
The 100% bypass is controlled as a func-
tion of the preset room temperature, the
measured extract air temperature
and the outdoor air temperature. As
a result the heat exchanger can be
circumvented in the summer and the
cool outdoor air blown out at night either
directly or via the earth collector into the
living space.
10. Outdoor air and supply air fan
Ensures the air volume flow for the sup-
ply air; provides the living spaces with
conditioned outdoor air.
11. Exhaust air and extract air fan
Ensures the air volume flow for the
extract air; conveys the consumed air
externally out of the apartment.
12. Pressure sensor for volume flow
constant function (optional)
Measured value sensor and pressure
sensors for the optional definable volu-
me flow constant function of the fans.
13. Exhaust-air-side sound absorber
insert (optional)
For noise reduction in the vicinity of the
exhaust air fan.
14. Front cover with an over-center
latch
The front cover can be easily opened
for maintenance work to the device, e.g.
filter exchange. When closing it, make
sure of complete fastening and sufficient
seal tightness between the front cover
and the unit’s housing.
15. Air line connection
Is for the purpose of connection to the
air line system. When installing, ensure
correct connection to the supply, extract,
outdoor air and exhaust air lines.
16. Cable inlets
Fundamentally the ventilation unit is
supplied electrically ready wired. The
cable inlets are used for making the
electrical connection, for connecting the
operator control unit and the optional
system accessories, for example, tempe-
rature sensors etc.
