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Patch321

@patch321

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Joined: Jan 13, 2026
Last seen: Jan 27, 2026

Topics: 1 / Replies: 13

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RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@f1p apologies, you are absolutely correct

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@ashp-bobba I agree. I think I'll simplify the system just or my own sanity. It's still oversized using the 30w/m2. I've got a garden office being ...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@f1p Thanks for the reply. Am I not right in thinking it's min =17L/min and max = 40L/min with optimal 32L/min? Model: PUZ-WM112VAA

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

The limit on this is 28L/Min, which I think I'm right in thinking the way they work will prevent the flow for the whole pump to never exceed 28L/min? ...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@ashp-bobba Its the flow from the outdoor unit prior to the filter

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

Just noticed this balancing valve on the flow pipe - do these come as standard? Seems odd since the recommended flow is 31 L/min and the maximum is...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@ashp-bobba Thanks for the reply. Would it not work that lowering the pump speed will give the system more time for the heat to be dissipated throu...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

Okay, so simply I've got an oversized ashp which is required to produce more heat than can be expelled into the house, thus it constantly switches to ...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@ashp-bobba interesting, but currently the way I’m running the ufh it’s constantly calling for heat, it will never satisfy the room thermostats. so...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@ashp-bobba Hi Bobba, It’s an FTC 6, house was built in 2024. Yes, when the play button goes it switches the pumps off. I’ve asked the pl...

2 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan Pump Issues… Circulation pump turns off when heat pump compressor turns off

@f1p thanks for the post. interesting, I wonder in that case its modulating down, I think the ashp is massively oversized for the heating d...

2 months ago

Forum