Next door to me want me to fit a new central heating timer/programmer
for them, as 'I am handy' (and cheaper than getting someone in to do
it).

They have a Baxi back boiler. Easily 20 years old, probably over 30yo,
with a really old dial type timer, which has stopped working altogether,
just the on/off switch now works.

This one at Screwfix seems to be the one I'll need:
http://www.screwfix.com/prods/18470/...ing-Controls/H
orstmann-425-Tiara-Programmer

Am I right in my thinking that this one will be suitable?
It may help that they think they have a wiring diagram for the old one,
which will make things a little easier if they find it.
Thanks
Alan.

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On Mar 13, 9:16*am, (A.Lee) wrote:
Next door to me want me to fit a new central heating timer/programmer
for them, as 'I am handy' (and cheaper than getting someone in to do
it).

They have a Baxi back boiler. Easily 20 years old, probably over 30yo,
with a really old dial type timer, which has stopped working altogether,
just the on/off switch now works.


I used a horstman timer for a long time and found it good and
reliabale and the batteries lasted for ever.

BUT be careful you don't get something too complicated for them or
you'll be summoned round there every time they want to change the
programme.

Robert

In an earlier contribution to this discussion,
A.Lee wrote:

Next door to me want me to fit a new central heating timer/programmer
for them, as 'I am handy' (and cheaper than getting someone in to do
it).

They have a Baxi back boiler. Easily 20 years old, probably over 30yo,
with a really old dial type timer, which has stopped working
altogether, just the on/off switch now works.

This one at Screwfix seems to be the one I'll need:
http://www.screwfix.com/prods/18470/...ing-Controls/H
orstmann-425-Tiara-Programmer

Am I right in my thinking that this one will be suitable?
It may help that they think they have a wiring diagram for the old
one, which will make things a little easier if they find it.
Thanks
Alan.

Yes that one will do. It's quite likely - though not certain - that your
neighbour has a system with gravity HW and pumped CH, so you need a
programmer which can cope with that. The one you suggest certainly can - but
so can electronic timers such as http://tinyurl.com/2n3ts2 [1]
I would personally go for an electronic one rather than a mechanical one if
you think your neighbours can cope with it ok.

[1] the Screwfix description doesn't explicitly say that it's suitable for
gravity systems, but if you click on the Instruction Manual link, it's clear
that it does.
--
Cheers,
Roger
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RobertL wrote:

On Mar 13, 9:16 am, (A.Lee) wrote:
Next door to me want me to fit a new central heating timer/programmer
for them, as 'I am handy' (and cheaper than getting someone in to do
it).



I used a horstman timer for a long time and found it good and
reliabale and the batteries lasted for ever.

BUT be careful you don't get something too complicated for them or
you'll be summoned round there every time they want to change the
programme.

Thanks for the replies everyone.
The simplicity of this one is what caught my eye. They cannot change a
bulb themselves, so working out a digital timer is likely to be beyond
their realm, hence the easily seen on/off clips on the clock face are
ideal.
Thanks
Alan.


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In message , Owain
writes
A.Lee wrote:
Next door to me want me to fit a new central heating timer/programmer
for them, as 'I am handy' (and cheaper than getting someone in to do
it).
They have a Baxi back boiler. Easily 20 years old, probably over 30yo,
with a really old dial type timer, which has stopped working altogether,
just the on/off switch now works.

One caveat is that with a system this old the hot water might be
gravity fed, and is very likely required to come on for the heating to
work (ie heating and hot water are not completely independent. I can't
remember which Plan this is but the interlocking inside the programmer
may need altering to suit.

There are interlock pins on the sliders themselves on the tiara for
doing this


--
geoff

In message , A.Lee
writes
Next door to me want me to fit a new central heating timer/programmer
for them, as 'I am handy' (and cheaper than getting someone in to do
it).

They have a Baxi back boiler. Easily 20 years old, probably over 30yo,
with a really old dial type timer, which has stopped working altogether,
just the on/off switch now works.

This one at Screwfix seems to be the one I'll need:
http://www.screwfix.com/prods/18470/...ing-Controls/H
orstmann-425-Tiara-Programmer

The Tiara is also a really old dial type timer (but functional)

It has isolated switches (i.e. not connected to live like many are) and
so would be suitable for any application


Am I right in my thinking that this one will be suitable?

The backplate will probably need changing

It may help that they think they have a wiring diagram for the old one,

Normally on the back of the timer itself ...


which will make things a little easier if they find it.
Thanks
Alan.


--
geoff