Dave
Had a look at the NVR and relay today with a view to wiring it up. I'm sorry to do this to you, but my wires are different colours and I am a bit lost on one aspect of your description as I read it as referencing the middle connectors on the relay twice (sure it is my lack of comprehension, not your description). I wondered if I could do it by numbers not colours?
My NVR has this picture on the side, which looks exactly the same as yours
On mine the wires from the mains lead go to the in terminals, 13 and 23. The brown wire (live?) goes to 13 and the blue wire (neutral?) goes to 23. I then have a pair of wires connected to 14, mine are red and white, I think the white one is the thermal cut out wire that needs to be cut off (coloured brown on yours). Then there is a black wire connected to 24. Finally there is a single white wire connected to the connection on its own with no number in the diagram.
On my relay there are eight points where I can make a connection numbered 1 to 8. The first six are horizontal (if I hold the relay so the numbers are the right way up), 7 and 8 are vertical and below 1 to 8.
In your post you say "The mains lead is straight forward, they go on the middle pair of the large spades on the relay." OK so I remove the live and neutral from 13 and 23 on the NVR. By the "middle pair of large spades" do you mean 3 and 4 on the relay, I.e. the middle row of the three horizontal rows? If so does it matter which way round they go?
Now moving on to the wires that go to the motor. I think the white wire paired to the red one that are both connected to 14 must be the thermal cutout connection. So, I would cut the white wire away from the brown. Then I need to take the wires from 14 and 24 off and connect them to the relay. This is when I get a little confused by your post, you say "Then the two motor leads go on the large spades in the middle of the relay." But this is the second mention of "middle", so I am not sure which pair on the relay you mean. If my connection of the wires from the mains to terminals 3 and 4 on the relay as described above is correct, can you tell me which terminals on the relay I should connect these wires to? Based on your pictures I would guess 5 and 6.
Again, does it matter which way around? As a starter for ten I assume that if the wire from 13 on the NVR has moved to 3 on the relay then the wire from 14 on the relay should also go to an odd numbered terminal on the relay, such as 5, correct?
Then I start to struggle more. I get that I need to put a spade end on the white wire I have cut of the brown wire originally connected to 14 on the NVR, but do I understand correctly that I then link this to the brown wire (live) on the new mains cable you sent me?
Then I connect the blue from the mains lead you sent goes onto the relay. If I read you correctly it will be onto one of the two vertical connections, presumably (looking at you picture) this blue wire needs to be on the same side as the blue wire from the original mains lead that is now on the relay.
Then finally, the white wire that is currently connected to the single unnumbered terminal on the NVR gets moved to the other vertical terminal on the relay.
Once this is all done terminals 1 and 2 on the relay will be the only ones that are not used on the relay and these get taped. Do I connect earth from the new cable you sent me to the same point as the ordinal earth is connected to within the box?
Sorry if this looks like I am playing back to you what you said above, but I want to make sure I get it right.
Confirmation or correction would be very much appreciated.
Terry.
EDIT: in an effort to understand what I am doing rather than just follow instructions I'll say what I think is happening and somebody can tell me what I have got wrong. The bottom two terminals on the relay (7 and 8) are where power comes in, in this case instead of connecting directly to the relay the live is diverted via the thermal cut off. This means the the circuit into the relay also 'powers' the thermal cut off. The six terminals running horizontally on the relay (1 to 6) are what the relay controls. Wen power is sent to the relay it turns a magnetic switch on that connects terminals 3/4 and 5/6, forming a circuit so the original mains lead now provides power to the DX motor. When the power from the new mains call is turned off the magnetic switch is turned off and there is no circuit to get the power to the motor.
If this is correct (though I am sure ot phased correctly) I have two questions.
1. Why connect the thermal cutout to the mains power to the relay and not to the circuit the relay switches on and off?
2. What is the function of terminals 1 and 2 on the relay?