Vents Fan - Connection Schematics with Humidity Sensor; Humidity Sensor Operation; Sensor Control with Manual Override

M
LT
N
S1
L
L
N
EL
A
M
LT
N
L
L
N
A
SB
Sample schematic of basic two-speed fan model connection (modifications A, B and D) with a humidity sensor (H).
70
EL
B
A
S1
A - Fan
B - Distribution box
EL - Lighting lamp
S1 - lighting switch
(shown schematically)
SÂ - base load mode switch
(shown schematically).
SÂ
The fan operates at speed 1 with switch
SB closed or remains off with the switch
open.
As the relative humidity on the premises
increases the fan automatically switches
to speed 2 and maintains it until humidity
drops to the pre-set level.
The fan constantly operates at speed 1.
As the relative humidity on the premises
increases the fan automatically switches to
speed 2 and maintains it until humidity
drops to the pre-set level.
You may use switch S1 which also doubles
as the light switch to manually engage
speed 2.
In this case speed 2 turn-on delay is
50 seconds. The turn-off delay following
the switch opening may range from
2 to 30 minutes.
35
VNVN
Diagram 10 Diagram 9