Haier Hydro All-in-One - Changeover Signal

Hardware Heatpump
1

Any Haier experts here?

I have a Haier Hydro All-in-One 8kW heat pump (HU102F20AHYA) and would like to send a “heating ON” signal to my underfloor wiring strip.

This unit has a Heating/Cooling changeover output signal, but since I am not using cooling, I have disabled it in the pump controller. Because of this, I cannot use that specific signal.

Looking at the remaining pins, I see a “Floor Valve” state. This would be perfect to wire into a relay with a dry contact switch. However, I don’t know how this signal actually behaves. Does it change state depending on the compressor function, or is it always ON whenever the pump is in winter mode?

The last option I am considering is using a Zigbee relay with a dry contact output to block the underfloor wiring strip when heating is turned off.

Just to explain why I need this: without it, any room thermostat could trigger the zone actuators to open even when the pump is strictly in DHW (Domestic Hot Water) mode.

I have studied all the technical manuals I could find and sent several emails to Haier support, but they never replied. :frowning:

I would be grateful for any assistance!

2

Little confused how you have the plumbing setup.

Water flow should be heat pump, 3 port diverter (DHW or CH). When doing DHW the CH side is isolated and it doesn’t matter that it calling for heat as all water flow is going to the hot water cylinder.

There is no need to tell the UFH that the heat pump is doing anything - if anything you tell the heat pump there is a demand for heat.