the RAV001 looks interesting :
as a control device ... but I'm not altogether sure I understand how it works (!) - ie: how it's commanded to do what it does - eg: when the datasheet says :
with a pulse-pause clock signal, which effects a periodic open/close position, a quasi-continuous control system can be achieved with a cycle duration of 4 minutes ... permissible cycle duration: either <4min or >12min ...
is it just saying the control is just on / off (but that's still fine - given the heating system is slow to respond anyway) ? And why <4min or >12min ??
the reason for my question, is that I'm looking at options for controlling our heating system (thermal store, UFH, direct HW with trickle feed) & I was hoping the control might allow setting the valve to any desired position between its extremes - not just at one extreme or the other - plus I was wondering if it might be used to control the setting of a thermostatic valve ?
PS: looks like the power consumption, at about 3W, when operating, could be a bit on the high side ... 3W x 24hr x 365days x 10p/unit x 50% duty = about £1.50 per annum per valve ...
as a control device ... but I'm not altogether sure I understand how it works (!) - ie: how it's commanded to do what it does - eg: when the datasheet says :
with a pulse-pause clock signal, which effects a periodic open/close position, a quasi-continuous control system can be achieved with a cycle duration of 4 minutes ... permissible cycle duration: either <4min or >12min ...
is it just saying the control is just on / off (but that's still fine - given the heating system is slow to respond anyway) ? And why <4min or >12min ??
the reason for my question, is that I'm looking at options for controlling our heating system (thermal store, UFH, direct HW with trickle feed) & I was hoping the control might allow setting the valve to any desired position between its extremes - not just at one extreme or the other - plus I was wondering if it might be used to control the setting of a thermostatic valve ?
PS: looks like the power consumption, at about 3W, when operating, could be a bit on the high side ... 3W x 24hr x 365days x 10p/unit x 50% duty = about £1.50 per annum per valve ...
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