What is this sytem called?

[pyesmith]

I have come across a system that heats the hot water off the radiator circuit, with no valves, cylinder stat or wiring centre. What is this sytem called, why was it done this way? Is this an old historic CH design before the Y, C, S plans etc came along or something?

There is no way to heat the water without having the rads on, unless you use the immersion. there is a two channel programmer, but it does seem to give much choice other than off or on!

any ideas?

[chris watkins]

Called gravity HW with pumped heating, pump for heating controlled via programmer & room stat. Boiler on for HW so domestic hot water temp same as boiler stat setting.

[TBServices]

Is this a joke?


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[chris watkins]

Why was it done that way ? well pumps didn't like the high flow temps so were fitted on the return were it was cooler, no domestic zone valve to speak of, the main reason - install & gas were cheap (Northsea gas was just about to come on stream, so tamz told me anyway)

[tamz]

Sounds like it is fully pumped and is an old system from the 70's pioneered by the likes of servowarm and FEP, 2 big heating players in the 70's and early 80's. Just a cheap to install early system of which there are still many around.
FEP's were usually Baxi WM's with the pump inside the casing, the return to the cylinder is 8mm and all the fittings are compressions.
If you are lucky you may find one of these that were fitted by Servowarm

summer winter valve.jpg

An early UNmotorised valve

If you want the heating off shut the rad valves.

(Northsea gas was just about to come on stream, so tamz told me anyway)

And big money and a ticket to the dry out clinic to be had building the Sullom Voe terminal to bring it in! (I wasn't allowed to go)

[chris watkins]

If you are lucky you may find one of these that were fitted by Servowarm
And big money and a ticket to the dry out clinic to be had building the Sullom Voe terminal to bring it in! (I wasn't allowed to go)

"Sullom Voe terminal" don't know what or where it is but it sounds impressive, is it still working ?? or do they just send all your N.gas straight over to Europe now.??

You would have to be very very very lucky to find a Servowarm master rad still going.

[tamz]

"Sullom Voe terminal" don't know what or where it is but it sounds impressive, is it still working ?? or do they just send all your N.gas straight over to Europe now.??

You would have to be very very very lucky to find a Servowarm master rad still going.

We had one of these in my mums house in the early 70's. The only people in the street with gas heating and a colour telly

Quite a fascinating beast of a boiler.
I took a Suprime model (the one with the wooden surround) out about a year or so ago from a house in Edinburgh. Still in pristine condition complete with mostly truwel pipe (also surprisingly pristeen but i ripped it out anyway) the rads with the dimples on the back and an urn in the bedroom. That is where the summer winter valve in the pic came from. It had the lable on it when i took it out
The only reason the old dear changed it was because the guy who fixed it (a local man to me) had retired at 75. He had worked with Servowarm in the 70's and when they more or less closed down operations up here in the 80's he set up a business repairing and servicing servowarm boilers. Now that was a nice wee niche market.

[chris watkins]

I think their HQ was down here fairly close to me, in Bromley?, until they went pop. Use to see a good few anyway, did not know they had got as far up to give you there unique pleasure.
Anyways I am off to bed now got a busy day tomorrow, (NOT). Unlike "I only need 40 's" now I am a little older. I find an late afternoon power nap does me find, mind you I have always been like that, just use to take it with a friend.

[tamz]

They were quite a big concern up here in the 70's. Had a lot of guys working for them. They even did new builds at the time.

[pyesmith]

If you want the heating off shut the rad valves.

Yeah, right, who wants to do this all the time in spring/autumn all round the house!

[AWheating]

Yeah, right, who wants to do this all the time in spring/autumn all round the house!

all the time? twice a year once in the autumn to turn them on once in the spring to turn them off.

part of the reason all this pants part L stuff like zones come in is people are too lazy to turn down a valve.

[chris watkins]

all the time? twice a year once in the autumn to turn them on once in the spring to turn them off.

part of the reason all this pants part L stuff like zones come in is people are too lazy to turn down a valve.

Sorry just remind me again when is spring & autumn? what bit of the year do they fall in ?