Central heating programmer
 

Trying to replace broken CH programmer. Old, not even sure of type but
wiring is as follows.

3 cables coming in.

G N L 123456
Earth - 3 Green
N - 1 Blue, 2 Black
L - 1 Red , 2 Red jumper wires going to contacts 2 and 5
1 - 1 Brown
2 - Red Jumper from L
3 - Empty
4 - 1 Brown
5 - Red Jumper from 2 (Live)
6 - Empty

1-on 2-C 3-Off 4-On 5-C 6-Off

I want to put Drayton SM2 Mechanical timer on this.
On Drayton Wiring is N L HWOff CHOff HWOn CHOn

Would the wiring be like this?

N - Blue, Black, Black as above.
L - Red As above
HWOff Nothing
CHOff Nothing
HWOn Brown
CHOn Brown

Earth - Earth as above.

No Jumpers.

Thank you for your time.

Central heating programmer
 

In message .com,
Diablo360 writes
Trying to replace broken CH programmer. Old, not even sure of type but
wiring is as follows.

3 cables coming in.

G N L 123456
Earth - 3 Green
N - 1 Blue, 2 Black
L - 1 Red , 2 Red jumper wires going to contacts 2 and 5
1 - 1 Brown
2 - Red Jumper from L
3 - Empty
4 - 1 Brown
5 - Red Jumper from 2 (Live)
6 - Empty

1-on 2-C 3-Off 4-On 5-C 6-Off

I want to put Drayton SM2 Mechanical timer on this.
On Drayton Wiring is N L HWOff CHOff HWOn CHOn

Would the wiring be like this?

N - Blue, Black, Black as above.
L - Red As above
HWOff Nothing
CHOff Nothing
HWOn Brown
CHOn Brown

Earth - Earth as above.

No Jumpers.

Thank you for your time.

Who knows ?

Without even a clue as to which make/model

I would have expected 2-3 and 5-6 to be the "ON" contacts

Why don't you try and understand what's going on, then you are more
likely to get it right

--
geoff

Central heating programmer
 

In message , raden
writes
In message .com,
Diablo360 writes
Trying to replace broken CH programmer. Old, not even sure of type but
wiring is as follows.

3 cables coming in.
snip

I want to put Drayton SM2 Mechanical timer on this.
On Drayton Wiring is N L HWOff CHOff HWOn CHOn

Would the wiring be like this?

snip

Thank you for your time.

Who knows ?

Without even a clue as to which make/model

I would have expected 2-3 and 5-6 to be the "ON" contacts

Why don't you try and understand what's going on, then you are more
likely to get it right


Indeed, a couple of suggestions to the OP. Post a piccie somewhere (not
on the group) of the old one. some one may well know it. 2. Try to work
out what the various cables coming in are to/from
--
Chris French

Central heating programmer
 

raden wrote:
In message .com,
Diablo360 writes
Trying to replace broken CH programmer. Old, not even sure of type but
wiring is as follows.

3 cables coming in.

G N L 123456
Earth - 3 Green
N - 1 Blue, 2 Black
L - 1 Red , 2 Red jumper wires going to contacts 2 and 5
1 - 1 Brown
2 - Red Jumper from L
3 - Empty
4 - 1 Brown
5 - Red Jumper from 2 (Live)
6 - Empty

1-on 2-C 3-Off 4-On 5-C 6-Off

I want to put Drayton SM2 Mechanical timer on this.
On Drayton Wiring is N L HWOff CHOff HWOn CHOn

Would the wiring be like this?

N - Blue, Black, Black as above.
L - Red As above
HWOff Nothing
CHOff Nothing
HWOn Brown
CHOn Brown

Earth - Earth as above.

No Jumpers.

Thank you for your time.

Who knows ?

Without even a clue as to which make/model

I would have expected 2-3 and 5-6 to be the "ON" contacts

Why don't you try and understand what's going on, then you are more
likely to get it right

i agree geoff after recently fiddling with my own progammer recently,
the old one had no instructions or indication of what the wire was for,
i had to literally walk round the system to find out which wires went
where and what they did when they got there!

still managed to get a shock tho!

and it worked a dream when i'd finnished installing the new one. i have
sellotaped the new programmer instructions to the boiler access panel
for safe keeping too!