I'm talking about the water-water HE which is far more commonly affected by debris.
The thread is about both heat Xs
If the OP's system is cleaned (c/w Magnaclean), the primary gas-water HE is no longer at enough risk to go to the lengths you're suggesting for an 18 year old combi.
He has a "new" heat exchanger, and when the boiler is replaced the plate heat X isolating the boiler still fully protects the new boiler, allowing full flow etc. It also allows TRVs on all rads.
It creates a primary loop and secondary variable flow loop, as in commercial systems, but with both being isolated from each other. Think of the plate heat X on the CH circuit like a vertical header, but much smaller and and instant.
Every engineer knows the method of CH transfer through a plate HE. It's also commonly used abroad where open vent boilers can be linked indirectly to sealed systems. It's unecessary in the OP's case and another example of something you've read for the first time a thought you'd try to be clever with.
If the OP cleans the system and protects it, the primary HE is unlikely to block.
Or you could try this
www.sentinel-solutions.net/en/waterproducts/systemfilter[/QUOTE]
This is new on the market. £120. Probably worth it.
I would rather fit the plate Heat X, Smart pump and TRVs all around.
It is clear you are intimidated by my knowledge.
Until it is neglected again.
You've almost said it yourself, John, but fitting an in-line filter that can block is an extremely bad design, because it relies on unscheduled maintenance (by someone who's aware of the weirdness) in order to ensure that the system doesn't damage itself.It is possible to fit a nylon gauze filter on the taps of the Magnaclean, if you do this, you have to remember to take them off regularly and clean them, or they will get clogged and cause a blockage
I would rather fit the plate Heat X, Smart pump and TRVs all around.
You haven't even had the experience of fitting the combi yet.
It is clear you are intimidated by my knowledge.
You put it down to what you like.
Until it is neglected again.
The same can be said for your remote plate HE.
You've almost said it yourself, John, but fitting an in-line filter that can block is an extremely bad design, because it relies on unscheduled maintenance (by someone who's aware of the weirdness) in order to ensure that the system doesn't damage itself.It is possible to fit a nylon gauze filter on the taps of the Magnaclean, if you do this, you have to remember to take them off regularly and clean them, or they will get clogged and cause a blockage
I'm curious, Bigburner - do you think DIY gas work should be legalised?
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