SERVICE MANUAL
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Service manual V1.08 | Nov-2015 | LM0002-EN
Page 49 of 97
3.13.2.1
LVLØ-ET1 external temperature sensor
Provided digital external temperature sensor is fairly precise (±0.5°C
from -10°C to +85°C) and can give up to 0.0625°C resolution from the
onboard digital-to-analog converter.
Usable temperature range: -55 to 125°C
DQ – Data – White or yellow wire
GND – Ground – Black wire
+5V – VDD – Red wire
NOTE:
Use multiconductor cable with nominal cross section max. 0.5 mm².
The push-in connection with integrated spring lever offers an easy way to connect and release the
conductor without using special tools.
3.13.3
KNX communication objects
There are two methods to receive outside temperature into LVLØ.
Either via internal sensor or via KNX communication object. In addition it is possible to monitor sensor
connection errors via KNX communication object (sensor malfunctions, connection issues).
Group
Address
Data Point Name
Data Point Type
Description
10/0/1
LVLØ Outside temperature Input °C
control EIS5
2 Byte
W
9.001
Control outside temperature from KNX
Floating value (°C).
NOTE: Setting via LVLØ mobile app must
Settings>Service>HEATING>outside temperature source is set to
"KNX" option.
10/0/2
LVLØ Outside Temperature Output °C
display of
value EIS5
2 Byte
R
9.001
Display actual outside temperature.
Floating value (°C), cyclically send to bus.
10/1/9
LVLØ Sensors Status Feedback
display of
value EIS5
2 Byte
R
8.*
Summarized status feedback object to display sensors status
feedback messages. Telegram with code is sent to bus cyclically
every 600s. Code explanation:
1 - water temperature sensor (OK/ERR)
2 - outside temperature sensor (OK/ERR)
4 - ext. system temperature sensor (OK/ERR)
8 - pH electrode (OK/ERR)
16 - ORP electrode (OK/ERR)
10/2/15
LVLØ Minimum Sensors Sending Interval Input (s)
control of
value EIS5
2 Byte
W
7.005
Control interval for sending measured values (temperatures, CLF,
pH, ORP) to bus. Applies only to sensors.
NOTE:
Details are documented in “KNX bus communication” section 6.
For examples of KNX communication see section 6.4.
3.14
External heating system temperature measurement
3.14.1
Overview
Based on measurement of this temperature the LVLØ controller executes setting of the heating valve.
Recommended sensor installation is near the heating source or in heat exchanger.
