Flow & Return on a Potty Flamingo..

[stulew]

Can somebody please help me out with identifying the Flow and Return Pipes on a Potterton Flamingo Boiler.
The L/H pipe goes to the top of the cast iron heat exchanger, and the R/H pipe goes to the botton of the Heat exchanger the R/H pipe is also where the drain off cock is for the boiler.
Any Help would be appreciated..

 

[bab]

the top connection on a castiron heatexchanger is always the flow mate,

 

[stulew]

Thanks bab...