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sHedC / homeassistant-mastertherm

Home Assistant Mastertherm Component, to communicate and control heat pumps from Mastertherm
MIT License
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High Tariff Control #106

Closed keytouch14 closed 1 year ago

keytouch14 commented 1 year ago

Checklist

Is your feature request related to a problem? Please describe.

Not really a feature request or bug but can't see how else to comment.

I have found a way to manipulate the High Tariff Control on my heat pump.

Describe the solution you'd like

I was able to turn on the High Tariff Control 'sensor' by removing a link wire within the heat pump. In my pump it was linking terminal 44 to 36.

IMG_0061 IMG_0065

Describe alternatives you've considered

According to the manual a relay can be used instead of this wire. Presumably you could use a signal for excess solar power from a PV setup to trigger the heat pump? Good for a hot water cycle?

Additional context

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sHedC commented 1 year ago

Not really a feature request or bug but can't see how else to comment.

Maybe we need to setup a section in the Home Assistant forum, or I can set one up here I will look.

According to the manual a relay can be used instead of this wire. Presumably you could use a signal for excess solar power from a PV setup to trigger the heat pump? Good for a hot water cycle?

This feature is used to turn off high energy features of the heat pump, you probably know that but stating what my installer said anyway.

You are suggesting that if the PV is producing more electricity than you need you could connect it to this to allow it to heat the water? So basically turn HDO off when PV is sending power back to the grid, this would assume you are at this time in Summer Mode and only using DHW.

Sounds over my head :)

There is actually a device that monitors solar to grid and turns on the immersion, there is also similar for EV Charging but I suppose you could do the immersion using this.

In my case I have a Tesla gateway connected to my solar so can see when energy goes to the grid in Home Assistant so alternatively could control DHW using that? Say keep it on at a given temp and if sending back to grid increase the requested temp and when drawing from grid reduce?

I wouldn't feel comfortable with my knowledge to mess with the electrics :)

keytouch14 commented 1 year ago

You're right, I'm going complicated when it needn't be.

Home Assistant can do all the work.

Especially as I didn't realise this turned things off rather than on.

Although could be handy for preventing the heat pump operating when my induction hob is on and drawing loads of power.

Close this one out.

sHedC commented 1 year ago

Yes there are options to say what it will turn off, by default the Sanity hot water and the Compressor, I think something else but you can set about 4 options.

Okay dokay, I will check out if I can add a place in the HASS forums for discussions :)

johny-mnemonic commented 1 year ago

@keytouch14 yeah, HDO was invented for the purpose of the Grid operator being able to block big home consumers (like DWH boilers) when there is a big demand in the grid (i.e. peak hours) and then unblock it when there is plenty of electricity. So they can sort of use it to balance the grid. As @sHedC wrote, with his marvelous HA extension you can control your HP the way you want without messing with electric signals. I have it working the way you wanted and I also have one more electric signal for cooling as I had my system way before @sHedC created this extension but you don't need to mess with it if you are happy with controlling your HP over MasterTherm server. It is much more convenient with much more control than just a dumb switch.