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Last seen: Oct 21, 2026
@iantelescope If my memory serves me correctly, you currently have one Grundfoss motor in your primary water circuit controlled by your Samsung ...
@iantelescope I understand how you are feeling and that is why @derek-m and myself are trying to help you hopefully get a functioning system for this ...
@iantelescope This is because you have the second pump connected directly to the thermostat output which is incorrect sorry. The second pump should ...
@iantelescope The method I used was as follows but it was done in Autumn and partial Winter when the heat demand was higher, in mid Summer this coul...
@iantelescope you cannot sort your control system out until you have sorted your hydraulic issues out and you are happy that it is running as efficien...
@jamespa You are absolutely correct and my point exactly. By using the correctly configured heat pump weather compensation you can match the h...
@iantelescope the honeywell thermostat was initially designed to control fossil fuel boilers but is compatible with heatpumps. If has the following ...
@derek-m @iantelescope You are almost correct. Option 2, the water pump is switched on and off by the room thermostat but continues running for 1...
@iantelescope I think Samsung intended this option to save energy however this should never be used especially when trying to achieve a continously ...
@iantelescope This #2091 option information is straight out of the Samsung user manual (which your installer should have left you a copy). I can cop...
@derek-m by applying 240v to the thermostat input terminal (which the honeywell does) then depending on which mode is selected in the Samsung controll...
postid="31563"] Disadvantages: The Thermostat minimum cycle time of twenty minutes, with a PWM Run time of between 3 and 8 minutes, the Grundfoss ...
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