conversion from conventional to combi

[andemz]

Hi all,

I am very interested in learning how a conversion from a conventional heating system to a combi boiler takes place. I have searched this forum over the past 2 days and have also searched the web. There are ,any diagrams showing pictures of the various types of heating systems, though no general guide on the basics of how this occurs.

Can anybody point me in the right direction to any literature or internet resource, or offer some information from experience.

Kind regards and thanks in advance

Andemz

 

[Gasguru]

Check water pressure and flowrates to see if a combi is suitable.

Rip out old boiler, hot water cylinder, cold water cistern, feed and expansion cistern, zone valves and all redundant pipework.

Replace all old radiator valves (bound to leak with a pressurised system).

Powerflush system (ideally with old boiler to create heat).

Install new combi (likely to require upgraded gas pipework), and controls to bring up to current regs.

Replace/modify any taps/wc float valves/shower valves to cope with mains pressure.

 

[andemz]

Thanks for the reply, much appreciated. I am considering undertaking the work myself, though very clearly I won’t be undertaking any Gas work, nor ripping the boiler off the wall. I was considering taking all of the necessary pipes 22mm flow and return, 15mm cold mains inlet and 15mm hot water outlet to the combi position and let the Corgi reg fitter upgrade the gas pipes, take the boiler off the wall, fit the new boiler on, then pipe up and fit the pressure relief valve 15mm.

I do admit to not having a wealth of knowledge about plumbing at this stage, the houses that I have are terraced 2 up 2 down, so I consider that they won’t be that complex. I have 8 weeks to develop an understanding and the tactic that I am going to employ is to gain an understanding of where the pipes go and their function. Once I have done this, I can work off this.

 

[Fluffster]

Get your corgi man in first to quote and explain your plan he should give advice on what he may or may not be happy with in terms of what work you do.
After all if he installs the boiler on a system you installed and it goes wrong who are you going to call back to fix it.
Go on a plumbing course of some intermediate level on heating to get a grip of the mechanics of un vented and vented systems.
Get your pipe bending and soldering up to scratch along with the water regs for laying pipes,location, clipping, insulating etc.
Pete

 

[andemz]

Thanks for the adivce. I appreciate that.

 

[corgiman]

Thanks for the adivce. I appreciate that.

so you should!

we are all great!

We are all the Billy "big Bananas" of boilers and plumbing (except gasforyou who is the DADDY of plumbing, I am his beeatch you know)

 

[gas4you]

Thanks for the adivce. I appreciate that.

so you should!

we are all great!

We are all the Billy "big Bananas" of boilers and plumbing (except gasforyou who is the DADDY of plumbing, I am his beeatch you know)

 

[corgiman]

Thanks for the adivce. I appreciate that.

so you should!

we are all great!

We are all the Billy "big Bananas" of boilers and plumbing (except gasforyou who is the DADDY of plumbing, I am his beeatch you know)

You rang