Installing a shower extractor fan with 3 pole isolator switch and pull cord??

Sorry, I just wondered as I have 2 pull cord switches in my bathroom, one operates 5 downlights within the bathroom (by sink and bath), the other pull switch operates the shower and a downlight within the enclosed shower cubicle (the extractor fan would be in line from that downlight).

There is a window in the bathroom which does open but doesn't help with the steam in the shower cubicle as it is fully enclosed and therefore requires the extractor fan.

 

The showerlight is wired with 1.5mm 2 core and earth into the source of the pull cord along with the shower source 10mm, which goes into a transformer for that showerlight. The 10mm feed cable runs from fuse box to feed of pull cord.

 

I have now fitted the QVS isolator and FCU (together unit) taking the feed 3 c + e from switch pull cord load side and then another 3 c + e to the extractor from the isolator.

How is it best to wire the FCU side?

 

How do I wire the QVS FCU in as it only has connections for L in and L out?

Many thanks

 

The instructions show the FCU with L & N.

 

Could I just bridge a live wire across from the 3 pole isolator for both in and out (separately of course) to the FCU side of the QVS unit?

 

I have never seen these combined 3 pole isolator and FCU before so the wiring was a mystery to me. I wasn't sure if the bridging wire for the live circuit for the FCU would work.

 

I have completed the wiring connecting the fuse side to the 3 pole isolator to each of the live connections, however, the fan just runs constantly when the light switch is pulled, doesn't switch off when pull cord is off no matter how long after.

 

I followed your previous advice - Ok so you need to run 3c & E cable from the switch to the 3 pole isolator.
L & N from the feed side into the switch
Switched live from the live terminal on the load side of the switch.

Yes, I have a multimeter.

 

I have found the problem to be the bridging wires for the fuse to the 3 pole isolator as the moment those are disconnected then the fan runs on for 10 mins (as the timer wheel is set to) and then switches off.

Please run by me which connections those fuse wires go to?

 

Am I right in thinking the FCU side of the QVS combined unit needs bridging wires from the live and neutral of the in side (from the pull switch)?

 

CORRECTION - I meant permanent live and switch live from the pull cord so on the in circuit to the 3 pole isolator switch, bridged across to the FCU???

 

Ok, so in the end wiring the 3amp fuse side of the 3 pole fused isolator switch was straight forward.

The live goes from the pull cord switch to the L IN of the fuse. Then with a spare piece of live (brown) wire connect L OUT of the fuse to L2 of the IN for the isolator switch.

L1 is switch live, N neutral.