Maico WS 170 L, Operating And Maintenance Instructions Manual, Page: 24 / 62

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│ 2. Product information
22
2.2 System overview
Figure A: WS 170 in right-hand version
Figure shows WS 170 KBR by way of
example
Not illustrated: WS 170 in left-hand version
with mirrored design
I
Outside air
II Supply air into living areas
III
Exhaust air from living areas
IV Outgoing air
Item Designation Function
1 Front cover.
Bypass unit
also with
bypass
channel. Is removed for filter
replacement or for
cleaning and
maintenance work.
2 Quick-release
clip For simple opening
and closing of the
front cover.
3 Ø125 mm duct
connection For connecting folded
spiral-seams ducts or
accessories, items
19+20.
4 Cable
duct For control cables and
optional components.
5 Cable screw-
connection For power cable, fully
wired in the unit.
6 Main switch Mains switch
On/Off
7 Door contact
switch
single for
standard unit,
double for
● comfort unit
● bypass unit Safety equipment:
Fans and/or frost
protection heating
registers switch off
when the front cover
[1] is removed.
8 G4 air filter in
● standard unit
optional in
● comfort unit ●
bypass unit Filters coarse
dirt out of the air.
9 Pollen filter,
filter class F7 in
● comfort unit
● bypass unit Filters the smallest
dirt out of the outside
air, e.g. pollen.
Item Designation Function
10 Electronic slide-
in module Contains the control
circuit board and
optional extra circuit
boards for heating re-
gister or bypass shutter.
11 Frost protection
heating register
● comfort unit
● bypass unit For preheating
the outside air.
12 Outside air fan Conveys fresh air
into the living area.
13 Outside air
temperature
sensor in
● bypass unit Measures the outside
air temperature in the
outside air channel
immediately down-
stream of the frost
protection heating
register.
14 Outgoing air fan Conveys the used air
to the outside.
15 Bypass shutter
in
● bypass unit If the outside air is
cooler than the room
air (warm time of the
year), the outside air
can be fed straight
into the supply air
spaces via the front
cover's bypass.
16 Condensate
elbow
with reducer For connecting the
outlet hose. Conden-
sate collected in the
heat exchanger is dis-
charged via this hose.
17 Frost protection
temperature
sensor Measures the
temperature of the
outgoing air directly
downstream of the
heat exchanger.
18 Heat exchanger The heat transfer
between the exhaust
air and supply air
flows happens in the
heat exchanger.
19 Ø125 mm pipe
elbow Optional

Accessories
20 Plug connector
+ lip seal Ø125 Optional

Accessories