Calorifier hose connections - is there a right way and a wrong way?

[Ric]

Does it matter which way round the hose connectors to a calorifier are connected? I noticed that the gash-mechanic I employed to do some work on my MD2020 has reversed the connection, because he cut one hose off and it was then too short to reconnect to the former outlet.

 

[sailorman]

https://duckduckgo.com/?q=Calorifier+hose+connections&t=opera&ia=web

 

[prv]

The instructions say it doesn't matter on my horizontal calorifier, which makes sense since both coil connections are at the same level (towards the bottom). If you have a vertical unit and one fitting is higher than the other, it ought to transfer more heat if the hot water comes in at the top and cooler water out at the bottom.

Pete

 

[RichardS]

Certainly car radiators and home indirect heating coils tend to connect the hot feed to the upper connection. I was working on a car heater matrix the other day and the hot feed went to the upper connection, although that matrix seemed odd in that the core flow was horizontal rather than vertical. The main radiator flow was vertical which is usual. It's a long time since I removed a heater matrix (1973 actually!) and I'm sure that one was vertical flow.

Richard

 

[vyv_cox]

Thermo-siphon is surprisingly powerful. When I reversed the hoses on my vertical calorifier the circulation pump was unable to flow against it.

 

[charles_reed]

Thermo-siphon is surprisingly powerful. When I reversed the hoses on my vertical calorifier the circulation pump was unable to flow against it.

which means that....? Pete is right, about the desirable connection, but not about it being immaterial?

 

[macd]

Thermo-siphon is surprisingly powerful.

Indeed: powerful enough to provide the sole means of circulating coolant on Scott motorcycles, Ford Model T and Popular, lots of ship's boilers...

 

[charles_reed]

Indeed: powerful enough to provide the sole means of circulating coolant on Scott motorcycles, Ford Model T and Popular, lots of ship's boilers...

I could add to the cars - all the Alvi up to the Speed 20, Riley 9, Bentley 3 litre..

However, I suspect, that the thermo-siphon effect is dependent on the relative height differences between engine water-pump and the calorifier feeds. relatively immaterial, if engine water pump is level or above the calorifier input.