Wiring Drayton LP711 Timer to Megaflo Heatrae Sadia

[Cazza99Kent]

My Megaflo Heatrae Sadia only controls the hot water in my flat. The old timer a Grasslin QE 7+ has stopped working so decided to replace with a Drayton Lp711. The problem I am having is where to allocate the live and neutrals?? The LP711 has the following set up

N- neutral wire in
L - Live wire in

1 COM
2 OFF
3 ON
4 I believe this is spare?

After placing the Live (L) and Neutral (N) in I have two lives and two neutrals remaining and I'm not sure where they need to go, i.e 1/2/3?

I have also put a link connection between L and 1 as per the instructions.

many thanks

 

[EFLImpudence]

Do you have two immersion elements?

 

[Cazza99Kent]

Yes it does

 

[EFLImpudence]

Supply Live to L
All three neutrals go to the N terminal.

Link from L to 1
2 is the live to the boost immersion (top)
3 is the live to the off peak immersion (bottom)
4 nothing

All CPCs (earths) connected together

 

[EFLImpudence]

I have just noticed that this timer only has a 3A fuse so is not suitable for immersion heaters.

You will need one with a 16A rating.

 

[AndyPRK]

Drayton Lp711 are not suitable for immersion heaters due to the current requirements

 

[Cazza99Kent]

Thank you for the responses. Any one you would recommend ?

 

[EFLImpudence]

To confirm:

Your whole electrical supply changes to cheap rate at the specified times,
not just a separate supply coming on at these times.

 

[Cazza99Kent]

Whole electric supply is cheaper at specific times

 

[AndyPRK]

maybe something like this:

http://www.ebay.co.uk/itm/Timeguard...al_Electrical_Fittings_MJ&hash=item19d8159ed0

or

http://www.ebay.co.uk/itm/Immersion...arden_Hearing_Cooling_Air&hash=item338567eacd

 

[EFLImpudence]

Then this is one example -
http://www.screwfix.com/p/horstmann-economy-7-quartztimeswitch/44419

There are other makes and models.
If you search, you need at least 13A, and ones which accommodate ONE supply and TWO elements.

 

[Cazza99Kent]

Thank you