NVH-160H /230, NVH-160H/12/24– user’s manual, ver.1.0
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8
SPECIFICATIONS
3.3. Electrical elements
Housing is equipped with a heater controlled by a thermostat. The heater task is to avoid steam
condensation on glass window. That’s why heater is located next to the glass window. Depending on
housing model, the heater operates with 230 VAC or 12 VDC and 24 VAC. The heater is turned on
by thermostat when the temperature drops to 15˚C and turns it off when temperature reaches 25˚C.
Thermostat is located on thermostat board. All electrical elements are connected by default. One
should connect power supply to additional connectors located in the rear part of the housing (starting
from glass window).
Thermostat printed board
1 - Temperature Sensor
2 - Input voltage terminal block
L - 24 / 230 VAC - phase
N - 24 / 230 VAC neutral
PE - 24 / 230 VAC ground (earth)
+ - 12 VDC plus
- - 12 VDC minus
3 - Ground (earth) connector
4 - Heater connector (H1, H2)
5 - Camera voltage terminal block
L - 24 / 230 VAC - phase
N - 24 / 230 VAC neutral
PE - 24 / 230 VAC ground (earth)
+ - 12 VDC plus
- - 12 VDC minus
6 - Thermostat board mounting screws
CAUTION:
Heater is a non-linear element. Power consumption of heater in steady-state is
about 5 W. Power consumption in transient stage (especially in low temperatures)
may increase several times.
