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Post by battle1066 on Mar 5, 2018 20:23:49 GMT
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Post by tomplum on Mar 5, 2018 20:45:01 GMT
never in domestic but commercial or schools I've seen it a couple of times,  |
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Post by battle1066 on Mar 5, 2018 21:05:53 GMT
Why I ask is I've been requested to look a fixing a weeping TRV on a domestic install and to give a price - I always want to know what filling system is there cause I know that's always the part of the job with the hidden problems.
Now the owner can't seem to match any of those to his system as he says there's no pressure gauge or expansion vessel on the boiler side but knows the cylinder has an internal air bubble for expansion!
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Post by tomplum on Mar 5, 2018 21:16:27 GMT
thats a primatic system,
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Post by tomplum on Mar 5, 2018 21:20:12 GMT
the heating fills throu the cylinder, It was popular in the 1960's/early 70's, but soon was outdated because the system could not be pumped, it can work on gravity only,
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Post by battle1066 on Mar 5, 2018 21:22:29 GMT
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Post by tomplum on Mar 5, 2018 21:24:49 GMT
changing valves is problematic, you cannot bung the system and a snatch is not recommended because if it goes wrong the whole of the cylinder will come at you, So a full drain down in cluding the cylinder will take 40 minutes, the refilling also can be a nightmare if the circs air lock, which probably will happen, this will also cause black bath water for a day or two, price accordingly
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Post by battle1066 on Mar 5, 2018 21:27:02 GMT
the heating fills throu the cylinder, It was popular in the 1960's/early 70's, but soon was outdated because the system could not be pumped, it can work on gravity only, This is early 2000 install for this idea I believe |
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Post by tomplum on Mar 5, 2018 21:34:39 GMT
never seen one of those battle, where's it filled from ?
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Post by battle1066 on Mar 5, 2018 21:40:06 GMT
The tank is filled from the water main at a reduced fixed pressure and the bubble top allows for domestic hot water expansion.
The boiler side I was expecting to be much like any sealed system or combi etc by a filling loop to a pre- set cold value, but I'm not getting the answers to my questions from the customer.
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Deleted
Deleted Member
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Post by Deleted on Mar 5, 2018 21:41:08 GMT
That's a mega flow design battle the air bubble at the top is your expansion vessel, to recharge the bubble turn off the supply and open the lowest hot tap then go to the cylinder and open the temperature and pressure relief valve on the cylinder and when it stops gurgling the bubble is recharged.
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Post by crowsfoot on Mar 5, 2018 21:42:14 GMT
I think you mean a pressurised heating system battle not unvented.
I've never seen fill method 3 battle - it seems to be gravity fed with a filling loop, all very odd.
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Post by tomplum on Mar 5, 2018 21:43:16 GMT
if its a megaflow it will have a expantion/fill point and pressure gauge, would't it, ?  |
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Post by battle1066 on Mar 5, 2018 21:46:04 GMT
That's a mega flow design battle the air bubble at the top is your expansion vessel, to recharge the bubble turn off the supply and open the lowest hot tap then go to the cylinder and open the temperature and pressure relief valve on the cylinder and when it stops gurgling the bubble is recharged. Yes but I want to work on the heating side which will need drained then recharged - it's the recharging of the boiler side - he says no pressure gauge,no expansion vessel for boiler side, no filling loop he's got me puzzled. |
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Post by battle1066 on Mar 5, 2018 21:47:40 GMT
He says it's a Gledhill cylinder unvented.
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