Hot Water Issues

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22 Mar 2021
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Having hot water issues boiler is firing port valve is working but water not heating correctly.
Should the gate valve above the pump in the picture be open or closed?
Thanks.
 
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IMG_20211011_094324.jpg
 
Where’s the cylinder thermostat? And is it set correctly? Do the pipes the other side of 2 port get hot?
 
No cylinder stat fitted. Flow from the port to cylinder is at boiler temp. The return is mildly warm. I've bled the coil air valve. I can get hot water but not at the usual temp which is really hot. 60° +
The gate valve above the pump has been partially open but I think it should be closed but not really sure. If open it looks like it short cuts the return flow to the boiler and back to the port if that makes sense.
 
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I think the gate valve above the pump is a bypass. How open is the one adjacent to it, same pipe?
 
Hi Chris thanks for your reply the valve to the right is fully open. I've had another look at the cylinder and found a stat set at 40 (didn't realise we had one) I've recently had work done on the system so suspect the stat was turned down then. I've turned it up now so guessing that was the problem re the temp.
If the valve in question is a bypass should it be left closed?
 

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