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Found 1 result

  1. JohnMo
    Many heat pump suffer short cycling or fairly short run times in shoulder months, mine included. So in an attempt to understand this more clearly and hopefully developing a coping strategy for all I am after some information. Water leaving temperature will have a target temp let's say 30 degrees, the heat pump has hysterisis for stopping and starting around this temp. So mine (Maxa) it is To start heating CH water the return water needed to be target delta T (between flow and return) + and adjustable 2 degs. So at 30 Deg the flow has to of reduced to between 22-23 Deg. To stop heating the overshoot is allowed to to 0.2 degs over so 30.2 degs. Grant/Chofu heat pumps are Start 8 degs below target (22 Deg) Stop 1 Deg above target (31 degs) The above are adjustable settings What is yours? Make Heating type - radiators, UFH or mixed. Another interesting feature is circulation pump option mode. Run always when there is a heating demand and sniffer mode, with only periodic running of circulation pump, one for a minute off for 10 mins. Do you know how yours operates?
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