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10 Cleaning and maintenance
Adjustment hints
• Ti interval operation:: The unit is switched off
during the interval time. Then, the unit runs for
10 minutes with nominal ventilation (full load
level) V2 or in the set level 40 m³/h, 60 m³/h or
100 m³/h.
• Settings menu is automatically exited after 60
seconds without pushing buttons.
9.1.2 Automatic humidity function
The control continuously checks the humid-
ity during permanent base load. If the unit is
operated without permanent base load, the
unit starts at reduced speed (base load 20 m³/
h) every 2 minutes for 30 seconds and meas-
ures the relative humidity.
The start delay is deactivated with the auto-
matic humidity function turned on.
Once the unit is installed, it adjusts to the room
humidity prevailing at that time (relative humidity).
This humidity value is saved as the first reference
value. The reference value does not have to be
specified manually.
If the relative humidity falls below the reference
value during operation, the newly established ref-
erence value is saved. The lowest possible refer-
ence value is 45 % relative humidity.
If the room humidity rises quickly, the unit is
adjusted upwards in a continuously variable man-
ner (depending on the humidity) to match the hu-
midity. The maximum flow rate at 100 % r. h. is
40 m³/h, 60 m³/h or 100 m³/h, depending on the
setting of V2.
If the humidity falls below the reference value,
overrun operation mode starts with the set over-
run time. The current reference value is then
saved.
If the humidity does not fall below the refer-
ence value within 60 minutes, the unit switches
to the set overrun mode and then switches off.
In the case of Light on, the unit starts up. If the
light is switched off, the unit continues to run until
the remaining overrun time has passed. The auto-
matic humidity function is then assigned max-
imum priority again and controls the unit as de-
scribed above.
Information
• ER EC/ER EC 2.1 units can also be operated
using a light switch during operation with auto-
matic humidity function.
• The interval operation is deactivated during the
humidity operating mode.
28
• Overrun time:
• A set overrun time of 0 minutes is only valid
for manual function with a light switch.
• For operation with automatic humidity func-
tion, the minimum overrun time is 3 minutes.
• For settings > 0 minutes, the overrun time is
the same for manual (light switch) and humid-
ity operating modes.
• Volumetric flows that can be set
V1: 20, 30, 40 m³/h
V2: 40, 60, 100 m³/h
see Changing setting parameters
9.1.3 Motion detector function
If a movement is detected/recognised, the unit
switches to full load level automatically without a
start delay.
If no movement is registered, the overrun delay
starts. Then, the unit switches off.
10 Cleaning and maintenance
10.1 Maintaining the unit
The unit is practically maintenance-free. Only the
air filter needs replacing every 6 months at the
latest, depending on the degree of soiling.
NOTICE The unit will be damaged if incorrect
cleaning agent is used.
Do not use aggressive cleaning agents.
1. Clean cover with dry cloth only.
2. If the cover is very dirty, remove it and clean
with water.
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