Ideal W CF 450 (GC 41 407 51)

[DJNelsonHeating]

Hi,

Just been out to look at a bungalow with an Ideal W CF 450 (GC 41 407 51) NG Boiler, but notice it has 2 x flow and 2 x return pipes, which I find a little perplexing?
The old lady requires a new boiler (clearly this one is ancient at over 25 years, and hugely inefficient), and was hoping I'd get a manual for it which would explain the 4 pipes, but no luck.

Anyone have a copy of this manual, or a clue as to what the pipework config is without going in the cramped attic and pulling up all her insulation to trace the pipes?

bear in mind that the hot water cylinder is in an airing cupboard at a level slightly below the boiler, so likely not gravity pipes for water and pumped central heating.

Also noticed that no pump or 3-way valve in airing cupboard, so likely in the loft too...

Thanx in advance.

 

[aggis]

Cold feed & Expansion off the boiler ?

 

[DJNelsonHeating]

Cold feed & Expansion off the boiler ?

Thanx. That is what I have been led to believe today, so should be fairly straight forward to convert to a system boiler config.
I'd just never seen a gravity cold feed and open vent plumbed directly to a boiler before!
I'll be able to clarify fully once I get in the attic and trace pipework (provided I get the job 😛 )