Maico WS 170 L, Manual, Page: 57 / 122

6.
Installation ‒ Electrical connection │
UK
55
6.7.4 Jumper settings
WS 170 factory setting:
Jumper on control circuit board
Jumpers
1...3 Factory setting
Jumpers 1, 2 and 3 open.
Extended setting range
Jumpers 1 and 2 bridged,
jumper 3 open.
Volumetric flows:
Setting range 40...160 m³/h
at each ventilation level

Chapter 7.3.
Jumpers
4 and 5 Frost protection temperatures,

Chapter 6.7.4.
Jumper 6 No function.
Jumper 7
Resetting ventilation level 3
Jumper 7 open:
Ventilation level 3 is reset to
ventilation level 2 after an hour.
Jumper
7 bridged:
Ventilation level 3 is not reset.
Jumper 8 Jumper 8 must be bridged.
Jumper 9 Switch-off function:
Jumper 9 bridged: Switch-off
function blocked.
In this case, the ventilation unit
can no longer be switched off at
the room air control.
The ventilation unit is running in
at least "Humidity protection
ventilation" level.
Jumper 10
Factory setting:
Jumper 10 open:
Hygrostat (with potential-free
contact) released.
Jumper
10 bridged:
CO
2
sensor or VOC sensor
released.
Without a sensor, jumper 10
must be open.
6.7.5 Frost protection temperatures
An internal frost protection monitoring
prevents the heat exchanger from freezing up
at low external temperatures. Temperature
sensors continually check the temperature on
the heat exchanger and of the outside air.
WS 170 comfort unit
Frost protection is ensured with the aid of the
internal frost protection heating register in the
outside air channel.
WS 170 standard unit
The supply air fan switches off if the outgoing
air temperature downstream of the heat
exchanger falls below the preset
"EF = Frost protection switch-on point".
The supply air fan only switches on again
when the temperature increases to the set
"AF = Frost protection switch-off point".
Setting switch-on and switch-off points
(standard or comfort unit)
Jumper
4
Jumper
5
T EF T AF
0 0 2 °C 8 °C
0 1 3 °C 8 °C
1 0 4 °C 8 °C
1 1 3 °C 6 °C
0 = Jumper open
1 = Jumper bridged
EF - Frost protection switch-on point
AF = Frost protection switch-off point