tomcoleman

but if loop 1 gets hot quicker (smaller run) the valve would then close or reduce right? if it does then more flow (i.e quicker hot water) will be pumped to the colder circuits fixing my issue i'll install soon - only one way to find out

as i understand it they open/shut depending on the reading of the probes. So if they are always powered on, they will always have power - no issue there. Being powered on all the time they will always be "detecting" temp via the problems when the pump/boiler is off the loop will cool down, the probes will tell the actuator "im cold" and the actuator will open (there just wont be any flow or heat as pump and boiler will be off) when pump boiler is on the actuators will already be in an open state it will then close or minimize the flow to the hottest circuit/loops thus giving more flow and heat to the coldest ones exactly what im trying to achive. unless im being stupid?

exactly the above. I have 1 thermostat (nest) which controls the UFH for the entire ground floor. If the actuatorsare powered on all the time then they will just open / close as they see fit to make sure floor is balanced? unless I'm missing something I was going to wire the actuators into the KL08NSB then just power that with mains power. When the nest calls for heat the loops will start to have water pumped through them, the actuators will then (most likley) close the hottest loops first thus giving more flow to the coolest loops thus having a balanced ground floor ?

yes if they are powered on/off all the time then they do go into calibration mode. hence i wanted to wire them into the wireing control center, porivde 230v to it and thats it so they are always on basically and just open and close as they see fit. the fact they are always on shouldnt make any difference to them ??

BUT if its always on i dont think makes a difference its not always on in the sense its always open, its more it always has power. The pin will then be able to move into any position the actuator see's fit.

i have tried adjusting the flow rates and over time they just mess up its a real pain with some rooms getting hot and some not - hence the auto balance.

Hi there Currently my UFH & system is setup as the following. Entire ground floor is UFH, i have a 8 port manifold (7 used) this is connected to my boiler and Pump. When i turn the nest up the pump kicks in pushing the water around the loops until temperature is met. Problem is the longer runs take longer to heat up so i purchased the Salus THB23030 - Auto Balancing Actuator. (7 of them!) I dont want to rip out my nest as i like the smart functions of the nest, i presume i can do the following. Install the Salus THB23030's (simple and easy todo) wire them into a Salus KL08NSB 8-zone wiring centre WHICH ONLY has 230v power supplied to it to power the Salus THB23030's. In effect they will be "always on" and will have the power to control the pins/flow as they see fit. Is there any thing im missing here? Would that be a good way todo it? As i say im retro fitting and dont really want to take away the nest or re-wire it.