Nest self-install guidance

[diybadger]

Hi all,

I've just succumbed to the lure of a prime day 3rd gen Nest and am currently considering whether to shell out for pro installation or give it a crack myself (I'd like the challenge, if it's going to be possible!).

My current setup is as follows:

• Boiler: Glow-worm Ultracom sxi (system condensing) w/ separate cylinder, located in a downstairs cupboard
• Programmer: Iflo hw & heating 24/7, located on wall next to boiler
• Stat: Invensys RTS 1, located in downstairs hallway (3 wires to N, L & 3 connections)

From what I've read, the sensible option would be to have the heat link replace the programmer next to the boiler which would become redundant. I don't think I can replace the current stat with the heat link (and leave the programmer on) as it's only got a heating call, not water.

For the Nest thermostat I'm undecided as to whether to;

a) Put it on the wall to directly replace the RTS 1 stat (in which case, what would I need to do in terms of the current wiring?)
b) Have it elsewhere on a stand, powered from the mains plug (assume i'd still need to decom the stat wiring anyway)

Does this plan make sense - is there anything that I may not have considered (other than the fact I actually need to work out the wiring!)? Also, will the ultracom is cause me problems & require a gas safe engineer, as the Nest page here suggests the ultracom2 sxi requires it?

Appreciate any advice from those in the know!

 

[muggles]

Heat Link goes in your airing cupboard next to your cylinder usually. You need to find the wiring centre and wire it in there

 

[ianmcd]

A good system but get the feeling that you would be better with a pro, if , if you can do it fair play , but sometimes not as simple as it sounds