Hi, new to this site-looks very interesting!
I have a central heating and hot water controller which turn on the HW and CH independently. The HW gives a 240V signal to the boiler whilst the CH part gives a 240V feed to power a valve to turn on the heating. The central heating will only work if the hot water is on.
I've recently installed a wireless thermostat between the CH controller and the valve but as it stands I have to leave the HW on 24/7 so that the CH can be activated at any time.
Ideally Id like to set the HW controller to come on at particular times in the day to heat enough hot water in the tank and have the thermostat wired into the HW so that when the CH needs to come on, the HW will be activated by the same 240V from the CH controller.
However, this would mean that whenever the HW is set to come on the CH will be activated as well.
My assumption is that I need to fit some sort of diode between the thermostat and the HW signal ensuring a signal only passes from the thermostat to the HW and not from the HW controller across into the CH valve.
So...my question is: am I correct that the solution is a diode?
If so my real problem is that I have no idea what type, rating etc of diode I would need?
Ive attached a really lame diagram just to clarify the question.
Thanks so much for your help!!!
I have a central heating and hot water controller which turn on the HW and CH independently. The HW gives a 240V signal to the boiler whilst the CH part gives a 240V feed to power a valve to turn on the heating. The central heating will only work if the hot water is on.
I've recently installed a wireless thermostat between the CH controller and the valve but as it stands I have to leave the HW on 24/7 so that the CH can be activated at any time.
Ideally Id like to set the HW controller to come on at particular times in the day to heat enough hot water in the tank and have the thermostat wired into the HW so that when the CH needs to come on, the HW will be activated by the same 240V from the CH controller.
However, this would mean that whenever the HW is set to come on the CH will be activated as well.
My assumption is that I need to fit some sort of diode between the thermostat and the HW signal ensuring a signal only passes from the thermostat to the HW and not from the HW controller across into the CH valve.
So...my question is: am I correct that the solution is a diode?
If so my real problem is that I have no idea what type, rating etc of diode I would need?
Ive attached a really lame diagram just to clarify the question.
Thanks so much for your help!!!