![]() ![]() Therefore in principle if the room temperature does not ever reach the desired value you should increase the AI number. So if the calculated flow temperature was 37 C then AI +5 would make it 42 C and AI -5 would make it 32 C. The AI values add the set number of degrees to the calculated flow temperature. If, for example, the outside temperature is 10 C then the flow temperature will be about 37 C. 4 C is the temperature used for heat loss calculations on my MCS certificate (which assumes the flow temperature is 50 C). This means that the flow temperature will only be 50 C when the outside temperature is -4 C or less. The ones I set myself are Outside Temperature: min -4 max 18 and Flow Temperature max 50 min 29. My installer was instructed to use very conservative settings. The weather compensation parameters will have been set by your installer and can by changed if you access the installer settings. This works because when it is warmer outside you house loses heat less quickly so can be heated less quickly also. So it will tend to reduce the water flow temperature when the weather outside is warmer. ![]() This has the impact of the ASHP only being on for short bursts (a minute or so) unless there is a big differential between the demanded and actual temperatures. I have a Honeywell T3R wireless thermostat that was included in the installation and as noted in the discussion above it is debatable whether it is particularly suited to ASHP as it operates in a pulsing control mode rather than a pure on/ off as for old fashioned themostats. On top of this I have a home brew Raspberry Pi system that grabs data from the PassivLiving unit. Remote wireless internal air temperature sensor Sontex SuperCal 531 metering unit for ASHP output, flow rate? and temperaturesĮastron SDM230-Modbus meter for ASHP power usageĮastron SDM130-M meter for immersion power usage As far as I know it has no direct connection to the LG Therma V unit, it only uses its own sensors. I have a PassivLiving MMSP unit installed. Sorry for the delayed response I don't look at this forum too often.
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