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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Aug 6, 2025
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Topics: 17 / Replies: 2074
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RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

Continuous running: weather compensation (room stat at 26 ie 'always on'); setbacks timed by turning the room stat down to 12 degrees between 2100 and...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

I've been running with 6 hour overnight setbacks for the last week. Here is the last two weeks noon to noon mean OAT and energy use, left hand side no...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

@sunandair - interesting. I have added an eyeballed trend line, ignoring the outlier, and the general shape of the curve is very similar to the curves...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Real world connection to a heat pump over modbus

@ctw - Freedom can be very awkward, they have a B2B business model that means that as a rule (but not always) they ignore us mere end users. If you ca...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Real world connection to a heat pump over modbus

Here's a better close up photo:

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Real world connection to a heat pump over modbus

@toodles - thanks, in a Midea controller they are labelled H1 and H2. You can just make out H2 (bottom right) in this image of my wired controller wit...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Real world connection to a heat pump over modbus

Basically, yes. It is a two wire connection to those terminals in the wired controller. I also added a simple 120 ohm resistor across the terminals. ...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Slash Your Heat Pump Bills Overnight

You weren't the only one. There is another recent truly bizarre post here, to which I nearly replied '"The broader challenge calls for a collective in...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Slash Your Heat Pump Bills Overnight

But that is pretty much what has been proposed in this thread... The point I am making is that if this happens widely, it may mean the tariffs end up ...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: Slash Your Heat Pump Bills Overnight

Another point to consider: what happens if time of use tariffs become commonplace, and many more people time their electricity use according to their ...

1 year ago
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Air Source Heat Pumps (ASHPs)
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RE: No-code, plug-and-play monitoring for your heat pump

Apparently so, according to their website. Samsung units have a modbus connection via an add-on board.

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: No-code, plug-and-play monitoring for your heat pump

Good thinking. I've also had a look at the connections in the photo, and it looks like a standard two wire modbus/RS485 hookup plus DC power supply:

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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