Again, a little unrelated, but I have learned a lot here so I thought I'd ask to widen my knowledge.
On my system there are two sliders on the programmer - one for CH and one for DHW.
In for instance, I slide the CH slider to ON (or the timer puts it on), what happens netx? I assume it waits for the thermostat demand heating? And then what, is that the point at which the 3-port valve comes into play and opens and requests the boiler to fire?
On my system there are two sliders on the programmer - one for CH and one for DHW.
In for instance, I slide the CH slider to ON (or the timer puts it on), what happens netx? I assume it waits for the thermostat demand heating? And then what, is that the point at which the 3-port valve comes into play and opens and requests the boiler to fire?