Thermostat advice for oil boiler

Savo1 · 29 Nov 2011

Hi I have the oil heating boiler pictured below and would like to add a thermostat in my living room. I have an old analogue timer switch in the kitchen with separate on off for hot water & heating but this seems to just turn on & off the heating.

11 - 6 by andysav1, on Flickr

11 - 7 by andysav1, on Flickr

There is a small box on the pipe at the top right of the boiler pictured below with a auto/manual switch on it set to manual

11 - 1 by andysav1, on Flickr

I was considering THIS Horstmann HRFS1 Programmable Room Thermostat from Screwfix
[/url] I have had a good read through the forum and think that this would work ok but just wanted to ask first before buying it to make sure. Would this work ok or is there anything else I should consider. Any advice would be greatly appreciated.

Thanks
Andrew

Hugh Jaleak · 29 Nov 2011

Be handy to know if the system is gravity HW/pumped CH or fully pumped. Do you have 2 pipes or 4 pipes from the boiler? (Excluding oil supply.) I suspect it may be the former but wise to check!

Whitespirit66 · 29 Nov 2011

Go on Hugh, have a stab in the dark.

Savo1 · 29 Nov 2011

I will go outside in the morning and have a look

Thanks

Hugh Jaleak · 29 Nov 2011

Not that brave!

Savo1 · 29 Nov 2011

Hugh Jaleak said:
Not that brave!

& its cold lol

Savo1 · 30 Nov 2011

Well there looks to be a pipe at the top left of the boiler, bottom right & its hard to see but there is one or poss 2 at the top right. The boiler is attached to the wall outside behind our kitchen sink, I moved out the cooker & there are 5 pipes behind it, 2 are for the sink leaving 1 bigger pipe & 2 smaller pipes. Sorry for the poor description.

Thanks

Whitespirit66 · 30 Nov 2011

Hugh Jaleak said:
Not that brave!

Maybe he's got his flash working now.

Hugh Jaleak · 30 Nov 2011

Still not much the wiser...

Assuming it is a gravity HW/pumped CH setup you have, any room stat needs to be linked between the timeclock and pump. Timeclock will switch on pump during CH 'on' periods, to move hot water from the boiler around the rads. The stat needs to be fitted so it acts as a switch, powering the pump when the stat senses a demand for heat.

shagty · 30 Nov 2011

I think the simplest option is to separate time and temperature control.

This can be achieved by retaining your existing time controller/or upgrading it in the kitchen, while adding a new thermostat. A dedicated time controller is generally easier to operate and the kitchen/utility is normally a good location.

Heatmiser have a number slim line thermostats that would suit your needs.
The DT model would be adequate. But the PRT model features programmability which can be used to set different temperatures on your daily heat schedule. For example 19deg during wake-up period and 20 during evening and so on. It also features delayed start but its effectiveness is limited.

link for stats: http://www.heatmiser.co.uk/web/index.php/room-thermostats/modern-programmable-thermostats.

It would be wise to test your frost protection system before commissioning the new installation.

Hope this helps.

S

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Thermostat advice for oil boiler

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