09/16
8. Electrical Connections: Electronic Humidity Model (Diagram 3)
For the fan to operate as a normal time delay unit with humidity over-ride i.e. when connected with a
switched live coming from the light switch into the fan, the fan will operate when the light is switched on,
and switch off after about 20 seconds to 20 minutes (timer is pre-set for the minimum). However should
the humidity in the room reach about 75%, which will happen if the shower is run or the bath filled with
hot water, the fan will switch on and keep running until the humidity has been reduced to a normal level,
about 65%. Connect to electrical supply as shown in diagram 3.
Neutral
Switched Live
Spare
Permanent Live
PCB Board Cover
Motor Wire
Humidity operated time delay control
Diagram 3
Time delays & humidity
over-risde operation
Terminal 1 - 1 Neutral
Terminal 2 - 2 Switch live Supply
Terminal 3 - 3 Spare
Terminal 4 - 4 Permanent Supply
077286
LP100, LP120, T. Max 40°C Rated 220-240V ~50Hz 20W
q
IP24
LP150, T. Max 40°C Rated 220-240V ~50Hz 25W
q
IP24
CABLE ENTRY
FIXING HOLES
CABLE
GRIP
MOTOR WIRE
MIN
MAX
10
30
15
20
–
+
DETAILED VIEW
Only adjust with power switched off
TIMER MIINUTES
PCB BOARD
COVER
POWER
CABLE
ENTRY
1
3 AMP
DOUBLE POLE
FUSED SPUR
_
NEUTRAL
+
LIVE
PULLCORD
SWITCH / LIGHT SWITCH
MIN
MAX
10
30
15
20
–
+
Switched Live
Permanent Live
Neutral
1
FIXING HOLES
40
50
60
70
80
90
98
OFF -
+ MAX
