However i then connected a perm live up into the loft and into the terminal block and it works on when i turn the light switch on the fan comes on when its off its off now here is the problem it s a timed extractor fan which is set to be on for 15 minutes however the timer is not kicking in for some reason.
Fitting bathroom extractor fan with timer.
Attach the electrical wires to the fan wires by twisting same color wires together white to white and black or red to black and attaching a wire connector.
It will typically start operating when the light is switched on but then continue to run for a pre set time after the light is turned off.
Use some decorator s caulk to fill in any gaps between the fan and wall.
For the fan to operate a normal time delay unit with humidity over ride i e.
How to replace a wall extractor fan.
It must also be possible to isolate the fan by means of a pull switch inside the bathroom or a fan isolation 3 pole switch outside of the bathroom.
When connected with a switch live coming from the light switch into the fan.
It efficiently extracts moisture from bathrooms or kitchens almost without noise.
Extractor fans with an integral timer or timed switch need a 3 core and earth supply to allow the unit to run on after a light is switched off.
Thus clearing the air in the room.
It is also easy to maintain and produces little sounds of about 16 decibels.
Xpelair dx100t has timer settings and a humidity sensor that powers on the fan to regulate the amount of warm air in the bathroom.
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.