You can set the sort order of messages? Just click on the link in the date column. Your preferences will be remembered, so you don't have to do it again when you return.
Re: UK_Selfbuild Insulating "awkward" bits of pipework
Lee wrote:
> Anyone know if CH pump bodies should be left exposed, or whether they can
> be lagged too ?
I'm pretty sure that the CH circulation pumps at work have a purpose-made
moulded EPS insulation "shell" round them, but IIRC it's only round the pump
itself, not the motor. I'll check when I go in this afternoon.
I'm following this thread with interest, because I too have come to the
conclusion that there must be significant heat losses from the heat bank in
spite of it's built-in insulation layer and the lagging I've put round the
"easy" bits of pipe.
Hi all Coming out of my thermal store, I have a multitude of pipes. Now, most of these I have insulated along the straight lengths, but there are several...
I'd be tempted to go for one of the non-adhesive options (sheet or roll) else it'll be a bugger if you ever have to fiddle with the pipework. Nick Nick Laurie...
if in a cupboard, maybe some baffles to stop air circulation could work well ? Air's a v.good insulator, so long as it isn't convecting - when it becomes a...
Hello Lee I've used Armaflex tape to stick Armaflex at joins. It only really sticks to foam (like Armaflex or itself) not to pipes etc. That means tou can...
Thanks for all the replies. I've ordered a couple of rolls of foam tape that looks like the Armaflex lagging tape but is cheaper (and will no doubt be crap!). ...
another idea is to wrap the joints in plastic bags, and then use expanding foam. I'm thinking the same way equipment is often boxed for transport - put it in a...
I think I would wrap the item in cling film first so that if (or more probably next week (murphys law)) you did need to service the joint then you should be...
I guess my description was poor. If you use a pair of bags, one either side of the joint, and then fill them both with foam, you end up with two halves that...
I would think you need to keep the pump bodies exposed, or at least the motor part of it. ... This email (including any attachments) may contain confidential ...
... I'm pretty sure that the CH circulation pumps at work have a purpose-made moulded EPS insulation "shell" round them, but IIRC it's only round the pump ...
I have a data logger on mine, we loose about 4-5 C out of the tank, and surrounding pipes overnight (so in 7 hours). We also loose about 2 C at 06:30, when we...
Do you start your CH circulating pump at 06:30? On initial start it'll push round a slug of cooler water which will return to the store and bring down the...
... Funny you mention the circulation. I noticed (by accident) the other day, that the flow pipe to my UFH manifold was constantly hot, even though it was so...
That would indeed cure the heat loss - but have you calculated the payback period ? I haven't done so either but suspect that it might be quite a while. ...
You'd also want to arrange a delay between valve and pump so that the pump doesn't find itself pushing against a closed valve. Nick Nick Laurie PC Repairs ...
Presumably you could do the usual thing of connecting the pump via the contacts that close when the valve is fully open, just like you do with the normal...
Just been discussing the 2-port valve idea on another forum. The simple answer is to power the valve from the pump supply, and then power the pump from the...
Is there a simpler way of preventing self circulation without a motorised valve? Can it it be done with some sort of low presure non-return valve? I have...
Hi Eric No I haven't looked at the payback period, but for me there's more to it than financial gain. Where the UFH pipes drop down through the wall to the UFH...
My initial investigations show the hot bits on our stuff are the exposed isolation valves, blending valves, motors, and of course the plate heat exchanger....
Simon Exactly so. A non return valve in a pumped circuit will prevent thermo-circulation. Used one on my central heating in the lkast house. Got one in the...
Lee This is the problem, how do you stop thermal self circulation through the pump in flow direction without the use of a motorised valve. I can't think of a...
years ago (ie: when my father put-in CH, with a floor-standing gas-boiler & radiators) it was the norm to rely on natural circulation & to have no pump at all...
... I checked, and it is as I thought. The pumps are enclosed in an EPS shell, so it must be OK to insulate them. Presumably a fair bit of heat will still leak...
I'm sure someone posted that answer earlier today, which is why I didn't bother to respond before. That is certainly how all of our 2 port valves are wired. ...
Offline 
Send Email