CaptainOgre

Hi All, Thanks for the comments The system works in a basic fashion, but having done some research into UFH I'm confused as to how to set it up to run most effciently (heating and cost). I can get each zone to call for heat. Zone 1, bedroom (6m2), Zone 2 batchroom (3m2), Zone 3 (9m2, (12m2-3m2)) Currently it take arounf 12 hours to heat the space from 15C to 20C and the things i'm concered about are; Pump flow is set to max, none of the zone are balanced and all run at over 5l/m if they get activated alone and 3l/m if all zone call for heat at the same time. I know how to set the flow by turning the flow meters but dont know what flow to set them, or what setting to have the pump on speed and contnast or PV or PC? The return temprature is only a couple of degrees lower than the outlet tempature. What does the red dial do, I have no idea nad can seem to find a refernce so am leaving it along? Which is the correct wiring for the thermostat? they are hardwired back to the Heamister UH4

Hello, I have inherited a UFH system (~6 years old) which is present in a small grannie annex, the previous owner have left no documentation or instructions (so no idea on the pipe lengths) and it does not seem to be working very well, it still heats and flows but looking at the system and trying to understand it, it seems to be set up incorrectly, any help welcome! 1/ Pump - What setting should it be on . I, II or III and Constant, P-V diff or P-C diff 2/ What Flow rate should the three zone be set at? Rough idea would be helpful, they all drop to the bottom when the zone calls for Heat/flow 3/ What is this for? 4/ IS this set correctly? 5/Whole system image 6/ The thermostat (heatmister slimline v3/v2 are wired differently), picture two looks correct from what I can tell but any reason for the difference?