NVH-300H /230, NVH-300H/12/24– user’s manual, ver.3.0
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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 12VDC and 24 VAC. The heater is turned on by
thermostat when the temperature drops to 18˚C and turns it off when temperature reaches 25˚C.
Thermostat is located on thermostat bard. 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).
Refer to picture below
CAUTION:
Heater is a non-linear element. Power consumption of heater in steady-state is about
16W. Power consumption in starting stage (especially in low temperatures) may increase several
times.
MARK
ELEMENT
H.1
Heater 230VAC or 24VAC/12VDC depending on model
STAT.1
Thermostat
TB.2
Additional connectors on thermostat board (V-IN)
FTB.1
N
E
L
Terminal connectors on terminal board, for hater connection;
- neutral or - 12VDC
- GND
- live line or + 12VDC
FS.1
fuse
TB.1
Additional terminal connectors for camera power supply etc.
Bottom part
Thermostat board
GND of Bottom
part
GND of Top part
