central heating programmer

[dazza2012]

hi everyone, new to this,

I'm changing from a danfoss 102e5 to a horstman centaurplus c27.
I've connected live, earth, neutral and also hot water on and central heating on but i'm left with a common. do i connect to hot water off and then add a link to central heating off?
any help would be appreciated,

 

[Rayger]

Hello and welcome,

Have you tried this link http://www.horstmann.co.uk/downloads.php

Hope it helps.

 

[dazza2012]

Hello and welcome,

Have you tried this link http://www.horstmann.co.uk/downloads.php

Hope it helps.

Thanks for your reply, i have looked but i'm still unsure as to where i connect the wire that came from common on the previous programmer (danfoss102e5)

 

[denso13]

Do you know what type of system you have e.g. do you have zone valves for the heating and hot water?

 

[dazza2012]

Do you know what type of system you have e.g. do you have zone valves for the heating and hot water?

No i don't have any zone valves just boiler and pump system for central heating i think

 

[denso13]

The common on the old programmer should just have been linked from the live. If you have a seperate wire coming from
somewhere else and connected to the common connection you will need to find out what the other end is connected to.

 

[simond]

If by 'common' you mean the end of the two on/off switches for hw and ch, this is a live conductor. If it is left over you should park it with the other live connections.

Your original timer could not control hw off when ch is on, the new one can but your other system components may not not support this.

Horstmann controllers arent the easiest to use either, perhaps you like the 1980s?

 

[dazza2012]

The common on the old programmer should just have been linked from the live. If you have a seperate wire coming from
somewhere else and connected to the common connection you will need to find out what the other end is connected to.

I tried connecting without common in as per instruction on centaurplus wiring diagram leaving terminals 1+2 blank, switched on o.k but when turning setting on hot water to off it blew fuse. i'm wondering if common was for the off switch for both hw and ch on the original danfoss 102e5.

On the danfoss when unconnecting it, mains supply went to earth, 5(N) +6(L) terminals, wires to water on and heating on which are 3+4 on the centaurplus and common which i don't know where/if to connect on the centaurplus.

 

[denso13]

As Simon said the common is a live conductor and 'could' be connected to the L on the new programmer. If this causes problems then you'll need to know what the other end of the old common is connected to.

 

[dazza2012]

As Simon said the common is a live conductor and 'could' be connected to the L on the new programmer. If this causes problems then you'll need to know what the other end of the old common is connected to.

Thanks denso and simon i will try this, thanks for your time

 

[dazza2012]

As Simon said the common is a live conductor and 'could' be connected to the L on the new programmer. If this causes problems then you'll need to know what the other end of the old common is connected to.

Thanks denso and simon i will try this, thanks for your time

Hi again just found conversion wiring diagrams for the above mentioned programmers online, and have wired acordingly.

c/h works fine now but whenever i try the other controls ie switching to just hot water or the other advance controls it just blows the fuse,

Any ideas?

 

[denso13]

You need to confirm what the existing cables are at the thermostat and what the other ends are connected to. Do you have a multimeter?

 

[dazza2012]

You need to confirm what the existing cables are at the thermostat and what the other ends are connected to. Do you have a multimeter?

Sorry no do not own a multimeter

 

[denso13]

Dazza, just to reiterate if it's blowing fuses on certain settings then it is plainly wired wrong. You need to test what cable is what or trace the cables back and tell us what they are connected to. If you're not up to that, which is fine, it is probably time to get someone. You are working with mains power and it can be dangerous stuff.