I currently have a digistat3 digital controller for the gas central
heating, It does my flippen head in as I can never get to grips with
digital stuff (I have the same prob with the tv, controls for everything
and lets not talk mobile phones) I have to set mon-fri and 3 seperate
time zones and then others for Sat & Sun. Before this winter I would
like to get a simplified version.
Like one of those round dials that has 15 minute segments and you push
it in or out for on and off and then have a seperate thermostat for room
Whats a likely cost for parts?
And is it an easy conversion. (I am not an electrician, ok with basics)
What sort of boiler? in particular is it a combi?
If its not a combi, then the programmer would need to handle hot water
and central heating times separately.
Mechanical stat, about a tenner, a programmer 20 - 40 quid depending on
what you want.
Yup, probably easy enough. However, before you go down that route, what
is it that you are having difficulty with on the current one? Is it just
that its not a well implemented example of a prog stat and hence
difficult to use, or is it something else?
If the former, it might be worth changing for a similar but different
stat that is more intuitive since that would be simplest to do.
Thanks for the reply John, its a combi.
The problem is me, as I get older I just want on / off switches. I can
sit down with the instructions and get it all set up but then when I
want to make any amendments I can never remember how I did it so have to
sit down and go through the instructions again step by step, I generally
as we progress in to better weather adjust settings to come on later and
off earlier and the reverse when the colder wether starts to kick in.
With the type I mentioned above it is easy just to flick another 15
minutes on the 'clock dial' I have the same prob with the tv although
very rare if I watch it but if I press the wrong button I am screwed for
the rest of the day until my wife comes home. (its an age thing I am
sure). The older I get (60) the more complicated these controls appear
Understood, there is a lot to be said for a knob you turn one way for
more and the other for less! ;-)
Obviously doing what you propose, is possible and probably not too
difficult. Alternatively you could make it more automated rather than
less, so that it takes care of itself.
From example, fitting an optimising stat, would take care of the need
to tweak the timings back and forth with the changing seasons - it will
work that out for itself. Likewise a simple to use prog stat can be left
well alone mostly. We never change ours, and don't even bother turning
the heating off in the summer - just leave it to the stat. Once its warm
enough it won't call for heat. Ours also has + and - buttons on the
front, so if you are feeling a bit chilly or too warm just nudge the
desired temp up or down. If you forget to set it back again later it
does not matter since the temperature will revert to the next programmed
one at the appropriate time.
The digital ones usually have a boost for an hour or on/off until next
timed event override which is usually good enough.
I'd urge the OP to write down the sequence of actions he needs to
program it rather than replace the existing unit with an inferior one!
(and check and replace the internal battery if it needs the time setting
or reprogramming more than once per decade)
I must admit on my somewhat more complex separate pump and two boiler
configuration I was considering adding an external temperature sensor
for simple weather compensation so that the CH system pump could be
disabled automatically (leaving just hot water) if the exterior
temperature rises above a set point. (~14C I estimate empirically)
Heating oil is so expensive now that saving it is very worthwhile.
This would allow it to take care of the rapid variation of spring days
which has spanned everything from snowing to sweltering hot in the past
fortnight. CH is currently on twice daily with overrides as needed.
The rules would have to be more complex since the pump must come on if
the wood burning stove is about to overheat or the other override is on.
I also understand. I often feel that manufacturers never field-test
their instructions - especially with the technophobic - which are almost
certainly written by someone pretty familiar with the device.
I get by OK, but my wife is wary and so for a similar room-stat to
yours, I have written a simple list of steps on an A4 sheet, which gets
the job done.
At the end of the temperature setting list, you can add the extras like
adjusting the clock, although my latest one now copes with that. A
simple list of steps is far less intimidating, than the invariably pages
of tiny writing.
I also now find it easier to refer to my list than the manual. Give it a
try before going to any great expense.
On Tuesday, March 13, 2012 6:27:27 AM UTC, Andy Cap wrote:
I recall being part of a group which was asked to test out timers by the consumers association for Which magazine. The one I recall was one which I was able to programme successfully, but I though the user interface was fairly poor - at one point in setting it you had to press one button precisely eight times; if you pressed the wrong number of times or left too long a gap between presses then you had to go back to the start...
A couple of years ago I was fitting 5 Siemens programmable room stats a
week. Most of the customers were elderly technophobes.
In the end John Rumm and I rewrote the instructions and I handed those out
We should have copyrighted our work. I am not saying we did a good job but
one wholesaler got hold of a copy and started to hand out photocopies with
The Digistat3 is a programmable thermostat and programable stats do
need a change of mind set to really get to grips with. Instead of
*when* you want heating you set *how much* heating you want.
Why? Does your daily/weekly schedule really change significantly with
With a programmable stat, like the Digistat3, you set up a
temperature profile for each day. At your selected times of day the
set temperature is automatically adjusted to what you desire. We have
ours set to 18.5C from 0700 to 1600, 20C from 1600 to 2300 and 15C
(effectively "off") 2300 to 0700.
If you are tweaking the on time to save heating the house to the
correct temperature too early in the morning the Digistat3 has
"Intelligent Delayed Start", the default for which is off. When "on"
this should delay the boiler firing up too early in the morning but
still ensure the desired temperature is reached by the set time. This
normally only applies to the first set point of each day.
As has been mentioned if you feel a bit warm or cool just nudge the
temperature up or down a degree or so with the nice big + and -
buttons. It'll revert back to the programed temperature profile at
the next set point so no woory of leaving the temp too low or high.
We just let ours get on with it all year, no switching the heating
"on"/"off" in autumn/spring.
60 is not old! You have another 20 or 30 years before you are "old".
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