Helios KWL 890 W Notice De Montage Et D'utilisation page 38

Installation and Operating Instructions
EN
CHAPTER 3
PRODUCT
INFORMATION
Central ventilation unit – KWL 890 W/W ET
3.1 Unit overview
Lower door
➊
Door latch
ù
Upper door
ä
Snap-in hooks
ë
Supply air fan
ö
Post-heating
ü
3.1.1 Model Label
The name plate is located at the bottom of the unit next to the heat exchanger (9).
3.2 Functional description
The unit has two heat exchangers. The heat exchanger continuously extracts heat from the stale room air (extract air)
and transfers this heat to the fresh intake air, which flows into all rooms connected to the duct system as pre-heated,
filtered supply air. The stale air is extracted from the connected rooms via the duct system. It flows through the duct
system back to the ventilation unit, gives off heat and is led outside through the exhaust air duct (see Fig. 2).
The heat recovery efficiency depends on the factors of humidity and the temperature difference between intake and
extract air. Units with enthalpy heat exchangers (KWL 890 W ET) recover humidity from the extract air in addition
to heat, which is returned to the rooms through the supply air.
ä
ù
➊
14
î
13
15
ö
Ø
Extract air filter Coarse 65%/G4
Å
Bypass shutter heat exchanger
î
Heat exchanger
Ø
Siphon
Æ
11
Mounting base
Mounting base cover
12
7
ë
17
16
ü
ö
Æ
12
13 Supply air filter Coarse 65%/G4
14 Supply air fan ePM
Bypass motor
15
Cover post-heating
16
17 Cable gland
Fig. 1
⓫
50%/F7
1