3.1 Equipment overview, fig. A
Pos Designation Function
1
Front cover
with
front shutter
2
Quick-
release clip
3
Cable screw
connection
4
Wall bracket
(option)
5
Cover
6
Air filter,
filter class
G4
7
Pollen filter,
Filter class
F7
8
Heat
exchanger
9
Outside air
fan
10
Condensa-
tion run-off
connection
11
Frost
protection
temperature
sensor
Front shutter [1.1], can be
hinged down for filter
changing. The front cover
is re-moved completely
for maintenance work.
For simple opening and
closing of the front
shutter.
W1 and W2: For power
connection and room air
control. Ready-cabled in
the ventilation unit. W3:
Connection for external
component, e.g. CO
2
sensor or external
operating display.
Ventilation unit can be
hung from the wall
bracket. Includes rubber
buffer [4.1].
Bypass connection
cover.
Filters coarse dirt out of
the outside air and
exhaust air.
Filters the smallest dirt out
of the outside air, e.g.
pollen.
The heat transfer between
the exhaust air and supply
air flows happens in the
heat exchanger.
Conveys fresh air
into the living area.
Connection for drain
hose. For dispersing the
condensation that has
collected in the heat
exchanger.
Measures the tempe-
rature of the outgoing air
directly after the heat
exchanger.
Pos Designation Function
12
Outgoing air
fan
13
Control
circuit board
14
Duct
connection
couplings
(4 items)
15
Room air
control
RB-ZF4
16
Digital room
air control
RB-D1-ZF4
(option)
17
CO
sensor
2
SKD (option)
18
Humidity
control
RFS
(option)
19
Door contact
switch
—
Option
"Summer
cassette", see
Chap. 9.7.
Conveys the used air to
the outside.
Central control unit for the
ventilation system.
Connection of supply air
and exhaust air channels
Ø 160.
With step switch and filter
monitoring.
Operating modes:
Humidity protection,
ventilation
level 1, 2 or 3.
Operation manual (venti-
lation levels) or with
automatic time program
P1 or P2.
Parameters:
switching times,
summer function
Sensor for detecting
carbon dioxide "CO
" The
2
supply of fresh air is done
dependant on the level of
CO
-present in the room.
2
Humidity control for
detecting the relative
humidity. The supply of
fresh air is done
dependant on the level of
relative humidity in the
room.
Ventilation unit switches
off when the front shut-ter
[1.1] is hinged down.
Cassette is a summer
substitute for heat
exchanger [8].
53