Hive & Potterton EP3000 - help

[stevens1975]

Hi guys.

I have a Potterton EP3000 remote controller and a Worcester Greenstar Camray Utility 25/32

I've upgraded to Hive but I've got a problem. I can fire the hotwater up and the boiler kicks in, however, when I try to fire up the CH, the hive registers that the central heating is on but the boiler doesn't fire up.

I've attached the following pictures
1) Old Potterton wiring
2) Hive wiring
3) wiring in box by boiler.
4) wiring box cover

Any ideas on what I've done wrong please

 

[stem]

The wiring to the backplate is a right rats nest, it is impossible to see what wires go where and earth wires have been used as live conductors. There seem to be more conductors in the terminals that would normally be there and dangerous wire whiskers are poking out from the terminals.

In your photograph of the original Potterton programmer, there is only one conductor in the switching terminals, but in the Hive you now somehow have 2 conductors.

First of all, was there a wired room thermostat in use before the Hive was installed? and if so, what have you done with it?

Secondly the EP range of programmers had different configurations, so it's difficult to know for certain what each of the terminals on yours does. Can you post a photo of the details on the back of your programmer. Here's an example of what I'm looking for. This is an EP2002, so yours might / is probably different.

 

[stevens1975]

Hi

Thanks alot for your reply. Attached is the photo as requested. someone told me to take the wire from no 5 as the hive doesn't have '5' and add it to the 'live' was this correct. If it helps I can explain which wires I taken out and put where. We didn't have a thermostat.

Regards

 

[stem]

I can't see where the wires in the original EP3000 photo were connected too well.

Did the EP3000 originally work as it should? I am a bit puzzled by the original wiring, at the EP3000? I wouldn't expect to find a wire in terminal 2 (Central Heating Off) this is very unusual. It looks like the grey wire went to terminal 2 did it?

 

[stevens1975]

Morning

Right so this morning I've put the old programmer back on with the wires in the original configuration (see attached) but for ease as follows:

Turquoise to N(choc block) linked to N
Light blue in N
Brown in L with a brown link to 5
Nothing in 1
Grey in 2
black and brown with red sleeve in 3
yellow and green with red sleeve in 4
linked brown and blue in 5
earth to earth (on side)

Never noticed before as we never used the controller only the power switch to turn on, but we can only turn CH and water on together and cannot control separately.

There is a screw on that back of the Potterton that lets you control them separately, but when you turn to CH the boiler wont fire up.

 

[stem]

Thanks for the update

It is rather unusual to have a wire in terminal 2 (heating off) but if it's there now and everything is working as it should be then I will include it in the description below. Without knowing what the other end is connected to it's impossible to say anymore than that.

Basically what you need to do is move all of the wires from the EP3000 terminals to the terminals that have the same functions on the Hive.

The comment you made earlier about the loop connection between EP3000 terminal L and 5 is correct. With the Hive dual channel version, this loop connection is already made inside the Hive and so the link should be discarded. The Hive doesn’t need it.

However, it looks as if the terminal 5 has also been used like a junction box, so whilst the loop is discarded, the other wire (blue) in terminal five would needs to remain connected to the L (as it is presently now via the loop)

Then it’s just a matter of moving each of the wires from each of the EP3000 terminals to the terminal of the Hive that carries out the same function. In your case the terminal numbers correspond between the two.

EP3000 terminal L = Live = Hive terminal L

EP3000 terminal N = Neutral = Hive terminal N

EP3000 terminal 2 = Central Heating off = Hive terminal 2

EP3000 terminal 3 = Hot Water on = Hive terminal 3

EP 3000 terminal 4 = Central Heating on = Hive terminal 4

The reason for the restriction in control functions is probably because your heating systems plumbing system doesn't support individual control of the hot water and heating, in that the hot water is heated by gravity circulation, and only the central heating is pumped. The programmer is then physically restricted accordingly, so that you can have the hot water 'on' on it's own, but not the central heating 'on' without the hot water also being 'on'.

NOTE: If this is the case. You will also need to select this function on the Hive for it to work. I think it's referred to as "systems with gravity hot water" but check the manual to be sure.

 

[stevens1975]

Thanks for everyone's help - I've swapped the CH and water wires over and everything is working as it should be.