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 0
Außenluft
Zuluft
Fortluft
Abluft
Außenluft
+
+
Bypass
EWT
+/-
The circuit diagram illustrates the fundamental
design of the domestic ventilation unit with the
optional additional system enhancements.
1 Unit’s housing
2 Supply air fan in EC execution
3 Extract air fan in EC execution
4 Outdoor air filter for fine dust F7
(optional as pollen filter in quality category F9)
5 Extract air filter G4 for coarse dust
6 Counterflow heat exchanger
(optional enthalpy heat exchanger)
7 Bypass flap
8 Frost pre-heating for counterflow - heat ex
changer (optional)
9 Condensate water tank with discharge and drain
trap (siphon) supplied by the customer
10 Connection pieces for the ventilation unit
11 Sound absorbers (optional) in the line system
12 Switchable flap (optional)
13 Re-heater battery design with warm water
(optional) with downstream supply air
temperature sensor
14 Earth heat exchanger (optional)
15 Suction element with pre-filter G4
16 Heater battery for brine EHE
(earth heat exchanger) ( (optional)
4 Functioning of the ventilation system
In the case of mechanically controlled
apartment ventilation the consumed,
humid extract air from the wet rooms of
the apartment, e.g. bathroom, toilet and
kitchen, is discharged and replaced by
conditioned, fresh and filtered outdoor
air in the residential areas such as the
lounge, bedrooms and other living areas.
High energy savings in the operation
of the ventilation unit can be realised
through needs-based system opera-
tion, the use of a highly efficient heat
exchanger for the recovery of heat from
the extract air into the supply air and
the use of energy-efficient fans with the
latest EC technology.
It should be particularly ensured that
the highly efficient heat exchanger is
protected against freezing via a suitable,
controlled frost-protection strategy and
that an effective condensate water out-
let, among other measures, is in place.
The more airtight the building shell and
the more effectively a house is insulated,
the more effective this technology is.
4.1 SYSTEM DESCRIPTION
