I want to install one of these when converting a vented to sealed system. The only issue being the boiler manufactorys ask for the prv to be fitted on the flow as close to the boiler as possible. However if installing this kit I would need to fit on the return, due to the expansion vessels required position. Due to this would I be better fitting the contols separately in to the system. Prv on flow. Expansion on the return. Thanks.
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Discuss Sealed system kits in the Central Heating Forum area at Plumbers Forums
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No issue fitting it on the return aslong as there’s no iso valves between it and the boiler
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Correct normally a 4 port tee
One end to the expansion valve. Another to the cold feed inlet to the system. One the central heating return. The other the connection to the pressure relief valve?
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Correct
system return
Filling loop
Expansion vessel
Blow off
system return
Filling loop
Expansion vessel
Blow off
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