Hi

Currently in rented accomodation witha Remeha Avanta Plus combi and a Siemens RDJ10RF wireless thermostat.

Background
Unfortunatly previously the thermostat reciever must have failed at some point and the unit has been removed and bypassed using choc block (basically when the boiler has power it is always set for'call for heat'

There has been a bit of a saga with the landlord getting a gas engineer to come and repair (the last engineer didn't know how to fit the thermostat lol)

I've attaced a diagram of the bodge of existing wiring. The original has made things a bit messy/complicated by taking the feed from the FCU and looping it into the Siemens Reciever (this is only really designed for 1 set of wires not 3) - the issue is further compounded by the the lack of space (the boiler is in the bottom of a cupboard) I have given up trying to get the wires to fit.

Current


Correct


The landlord has agreed that I can replace the thermostat (I've actually fitted a couple of this model before) and then a gas engineer will come and do the annual gas safety inspection.

My thoughts were to re run the cables:

+ Direct feed from FCU to boiler
+ 5 core between the thermostat receiver and the programmer terminals on the boiler

My question is what the rules are concerning removing the boiler cover to attend to the wiring inside - boilers I have worked on in an electrical capacity in the past have had a seperate cover for accessing the electrical connections.

Regards

Yea I get the L&N requirement and the volt free or 230v switching options - hence the 5 core

I was just going to connect the thermostat to the programer terminals on the Remeha.

Do you rate these Remeha boilers - I think it's bit poor that the wiring terminals are not accessible without disrupting the case integrity.

IIRC the Vallient I fitted one of these to before the terminals dropped down underneath.

Plus the front cover is made of plastic !

Jesus did I question that

The landlord has already agreed that he was happy for me to replace the thermostat - now unless I'm mistaken under most circumstances fitting a thermostat to an existing central heating install is not notifiable under either Part P or Gas Safe (obviously unless the casing has to come off the boiler)

It was only because the orignal 'RGI' has made such a flaming mess of the installing the thing in the first place that this is an issue

Exactly - I asked whether removing the case was possible and you answered in your 1st response.

I then asked you some generic questions

Do you rate these Remeha boilers - I think it's bit poor that the wiring terminals are not accessible without disrupting the case integrity.

IIRC the Vallient I fitted one of these to before the terminals dropped down underneath.

Plus the front cover is made of plastic !

I have no intention of breaking the gas regulations to carry out this work - the only reason I've got involved with this is because I've been waiting over 6 month's for this to be resolved and I'm fed up of having to turn the boiler on and wait for it to do its startup cycle everytime I want to use a hot tap