OP
Greg Taylor
Without seeing the system it is very hard to advise how to bypass the controls safely, some types of hot water storage need overheat protection as they can explode in a most dramatic fashion if they overheat.
The problem with a 3 port valve is that with it latched open manually it will be heating both DHW and CH without control.
Hi Dave, Thanks.
Its not an issue if I latch the valve open, as it will just feed the hot water tank and circulate. I won't be leaving the system running for any longer than 1 hour really. Just enough to heat rads and tank full of water!! Unless I am missing something...
is is there a way to miss everything out, just have the pump and boiler running? I will check that link now Teletrix, thanks mate