On 12/06/2016 13:17, ARW wrote:
"F" news@nowhere wrote in message
o.uk...
On 12/06/2016 11:57, ARW wrote:
"F" news@nowhere wrote in message
o.uk...
On 11/06/2016 10:19, ARW wrote:
"F" news@nowhere wrote in message
o.uk...
On 08/06/2016 23:06, Capitol wrote:

Use a mechanical timer. IME digital timers are a pain.

I chose digital for the battery backup.

Is the timer because the tank was boiling when the immersion was
left on
or for convenience to save you manually switching the HW on and off?

No, I simply didn't want to be heating water in the middle of the day
and during the night when we wouldn't use it.



What timer did you buy?

I haven't found one yet so have been using one of my existing
electronic switches (bearing in mind earlier warnings about the
plug/socket contacts).

I have fitted so few that I cannot give a recommendation. The ones I
have fitted have been awkward to fit but seemed to have worked well.


Now what is the difference between these two

https://www.tlc-direct.co.uk/Products/SMNTT03.html

https://www.tlc-direct.co.uk/Products/SMNTT04.html

The second , more expensive, one is a 'General Purpose Timeswitch
c/w Voltage Free Contacts' and 'Switches up to 750W incandescent or
halogen lighting/750W fluorescent lighting/100W compact fluorescent
lighting (cfl’s). Not suitable for discharge lighting'. There is no
mention of this with the other which is described as an 'Immersion
Heater Timeswitch' rather than a 'General Purpose Timeswitch

c/w Voltage Free Contacts'.

Does it matter?


I am hoping that Peter Andrew's :-) was because he was thinking what I
was thinking

That are the same thing but one of them has a live connection wire pre
installed to the volts free contact.

So, for an immersion heater application, does it matter?

--
F