Electrical hookup
Installation manual – System controller
21
3
3.2
TEMPERATURE SENSOR CONNECTION
Figure 3�2
Temperature sensor connection diagram (NTC 10k - Beta 3977) to RVS21.826
A
Grey connector X84 (botton edge of
RVS21.826 board)
B
Grey connector X80 (right edge of
RVS21.826 board)
B1 NTC 10k Beta 3977 temperature sensor
B3 NTC 10k Beta 3977 temperature sensor
B9 NTC 1k temperatrue sensor - included
Use of temperature sensors
B9
always
B1 only if heating circuit 1 is mixed
B3 only if DHW service is provided with K18
(only EVO versions)
Use shielded cable
2 x 0.5 mm
2
up to 40 m
2 x 0.75 mm
2
up to 60 m
2 x 1.0 mm
2
up to 80 m
2 x 1.5 mm
2
up to 120 m
