Drayton Digistat 3 Thermostat/Climate Control Issue

[ILCattivo]

Hi guys,

am hoping someone will be able to help me out here as to the cause of my problem...

I have a Saunier Duval Combi Boiler located in the loft to which is attached a wired Drayton Digistat 3 Thermostat climate controller located in the hallway near the front door!

My problem is that I have set all of the programmed times and temperature settings on the Digistat 3 as follows...

Mon-Fri (1-5)
1 ON 6:30am Temp 20°
2 OFF 8:30am Temp _ _ (I don't want the heating on at all in the house)
3 ON 16:30 Temp 20°
4 OFF 22:30 Temp _ _ (Night Setting and again I don't want the heating on at all in the house overnight)

The issue I am having here is that on Settings 1 & 3 I see the flame indicator on the Thermostat panel which tells me that the heating has fired up and I concur that the Rads are hot! However when on settings 2 & 4 the flame indicator is not present but the Rads are still on and Hot!!! Why?

I am getting really concerned that my Gas bill is going to become astronomical if this continues and my other half and I find it hard to sleep when the room temperatures are too warm!! Basically it's like our heating is on 24 hours a day even though I am requesting it not to be via the Digistat 3 climate controller panel.

Any ideas guys what might be going on here?

This is by the way a house we've only moved into 6 weeks ago......

Many Thanks

 

[doitmyself]

Mon-Fri (1-5)
1 ON 6:30am Temp 20°
2 OFF 8:30am Temp _ _ (I don't want the heating on at all in the house)
3 ON 16:30 Temp 20°
4 OFF 22:30 Temp _ _ (Night Setting and again I don't want the heating on at all in the house overnight)

Modern Digital Programmable Stats do not have an OFF setting. You turn the heating off by setting a very low temperature, e.g 5°C. This means that, normally, the heating is OFF, but will come ON automatically if the internal temperature drops a lot with the possibility of freezing.

Set nos 2 and 3 to 5°C and you should have no problems.

 

[ILCattivo]

Modern Digital Programmable Stats do not have an OFF setting. You turn the heating off by setting a very low temperature, e.g 5°C. This means that, normally, the heating is OFF, but will come ON automatically if the internal temperature drops a lot with the possibility of freezing.

Set nos 2 and 3 to 5°C and you should have no problems.

Many thanks for your reply doitmyself...

I concur that there is a minimum of 5°c Temp on the programme settings.. Hitting the minus button once 5°c has been reached blanks the temp out to nothing or "_ _" I will try your recommended settings later today when I get home, although I presume you meant no's 2 & 4 instead of 2 & 3..??

Last night for example I woke up at 3am and went and had a look at the thermostat reading where it displayed the 'half moon' Night setting (4) as being active with no flame indicator but the temp was 17° c... The Missus and I thought it was the middle of the summer!!

I have also noticed in the User guide for the Drayton DigiStat 3 that next to the default factory setting for the night setting (7°c) it states that this will be set to 16°c if the selector PIN is removed, see installation instructions...!! What is this 'Selector PIN' and could this be causing my high temps of a night???

Thanks

 

[doitmyself]

I presume you meant no's 2 & 4 instead of 2 & 3..??

Yes.

I have also noticed in the User guide for the Drayton DigiStat 3 that next to the default factory setting for the night setting (7°c) it states that this will be set to 16°c if the selector PIN is removed, see installation instructions...!! What is this 'Selector PIN' and could this be causing my high temps of a night???[/quote]
The Selector pin is on the back of the control unit. The purpose of restricting the lowest temperature to 16°c is to prevent the elderly lowering the temperature to much and increasing the possibility of hypothermia.

If the pin is missing, you should be able to get one free by contacting Drayton

Sales: 0845 130 5522
Technical: 0845 130 7722
Fax: 0845 130 0622

Email: [email protected]

 

[ILCattivo]

I will take the control unit off the wall when I get home later and look for the Selector PIN's presence on the back... I hope it's clearly marked? If it's not there then this would explain why it's still 16/17 °c of a night and possibly therefore during the day while we are not at home...

Do the elderly really have the money to run their Gas Central Heating at a minimum of 16 °c 24hrs a day!!!??

Thanks doitmyself, appreciate the help....

 

[doitmyself]

Do the elderly really have the money to run their Gas Central Heating at a minimum of 16 °c 24hrs a day!!!??

There is some evidence that it is cheaper to do this than to allow the heating to go off, so the temperature drops right down, possibly to near freezing.