We have an 11 year old standard boiler and cylinder heating system in the
house, was in when the house was built 11 years ago,

For the past 3 years the battery back up on the heating/hot water programmer
has been dead, so every time we loose power we have to re-set the damn
thing, and it's not the easiest programmer to set in the world, just lately
we've been having power cuts every other morning, and i'm getting fed up of
re-setting the thing.

we do have the british gas boiler and bits replacement plan thingy, but they
wont replace the controller just because the back up battery is dead, it
can't be replaced as it's soldered to the board.. well it could, but i'm not
going to,

So it's time for a new controller, the existing one is a randal 972, it fits
onto a wall plate with contacts on the back, i think there are 6 contacts,
but can't be 100% sure without taking it off the plate.. and having to
re-set the bloody thing again.

Anyone know if the randal 972 heating controller uses this industry standard
back plate so i can just buy any controller and plug it in and it'll work?
or if it's a non standard back plate, where do i get an adaptor, or do i
just buy a new controller and it comes with the back plate so i just swap
the wires over like for like (i recall something on the back regarding a
certian couple of terminals to be linked for one type of heating, un linked
for another) the system is a Y plan i think, 3 way mid position valve in the
airing cupboard, open heating system i.e. tank in the loft and all that.

In message , CampinGazz
writes
We have an 11 year old standard boiler and cylinder heating system in the
house, was in when the house was built 11 years ago,


Blah blah chris p bacon blah


Anyone know if the randal 972 heating controller uses this industry standard
back plate so i can just buy any controller and plug it in and it'll work?

No, it isn't, but I think the connections will be in the same order

or if it's a non standard back plate, where do i get an adaptor,

If you buy a new programmer, it comes with backplate


--
geoff

In an earlier contribution to this discussion,
CampinGazz wrote:


Anyone know if the randal 972 heating controller uses this industry
standard back plate so i can just buy any controller and plug it in
and it'll work? or if it's a non standard back plate, where do i get
an adaptor, or do i just buy a new controller and it comes with the
back plate so i just swap the wires over like for like (i recall
something on the back regarding a certian couple of terminals to be
linked for one type of heating, un linked for another) the system is
a Y plan i think, 3 way mid position valve in the airing cupboard,
open heating system i.e. tank in the loft and all that.

Virtually any 2-channel controller should do. You don't need any links -
that is just for gravity hot water systems to force the boiler on when just
heating is selected.

If it's a Y-Plan system, you *must* have a HW off connection in addition to
CH on and HW on - otherwise it won't work.
--
Cheers,
Roger
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"Roger Mills (aka Set Square)" wrote in message
...
In an earlier contribution to this discussion,
CampinGazz wrote:



If it's a Y-Plan system, you *must* have a HW off connection in addition
to CH on and HW on - otherwise it won't work.


Cheers for that,

i'm asuming it's Y plan, going from earlier discussions when i was after a 3
way mid position valve that ran on 12 volts.

Basicaly in the airing cupboard there's the hot water cylinder, 22mm pipe
comes down from the loft, through the pump then goes to the 3 way valve, in
the up position (htws) it goes to the coil in the cylinder about mid way up
(with a Tee off it to an air vent/safety valve), comes out the bottom of the
coil, and goes through the floor and around the house,

The bottom direction from the 3 way valve (htg) goes straight down through
the floor,

Does that sound like a Y plan system then?

In an earlier contribution to this discussion,
CampinGazz wrote:

"Roger Mills (aka Set Square)" wrote in
message ...
In an earlier contribution to this discussion,
CampinGazz wrote:



If it's a Y-Plan system, you *must* have a HW off connection in
addition to CH on and HW on - otherwise it won't work.


Cheers for that,

i'm asuming it's Y plan, going from earlier discussions when i was
after a 3 way mid position valve that ran on 12 volts.

Basicaly in the airing cupboard there's the hot water cylinder, 22mm
pipe comes down from the loft, through the pump then goes to the 3
way valve, in the up position (htws) it goes to the coil in the
cylinder about mid way up (with a Tee off it to an air vent/safety
valve), comes out the bottom of the coil, and goes through the floor
and around the house,
The bottom direction from the 3 way valve (htg) goes straight down
through the floor,

Does that sound like a Y plan system then?

Could be - but it doesn't sound *totally* conventional! Is the boiler in the
attic? If so, the coil return may first go down to join up with the heating
return before going back up to the boiler somewhere else. If you could post
a photo of your airing cupboard setup somewhere, it would be useful.
--
Cheers,
Roger
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