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LG Therma V R32 Monobloc. Setup advice inc flow temperature & weather compensation

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(@tim441)
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I found a useful video on setting up controller for AI. Need to watch several times & use stop start!

https://m.facebook.com/RenewableBuildingSolutions/videos/400881121092193/?_rdr

Key changes on my case:

1. As explained above I'm using water only sensor for now and will use room thermostats for internal air control

2. Heater priority

Was Main & Boost on

Changed to Boost only on (as also suggested by @derek-m)

3. DHW time setting 

Was 90 - 0 - 90 

Changed to 30 - 30 - 30 

4. Pump setting in heating

Was on 2    off 1

Changed to Continue

5. Pump capacity

Was 75

Now 85 (video suggests 100 but that seemed to make the system noisy in the house)

Am using AI mode 

One important(?) difference from video was at the end of video it says go to functions and change "Water function setting" to Auto. On my screen there is no such option! any ideas?

 

20221230 120350
This post was modified 1 year ago 3 times by Tim441

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS


   
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(@tim441)
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Joined: 2 years ago
Posts: 166
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A very useful official video on controller settings

Somewhat frustrating as it jumps around in different order to settings so needs stop start! But helpful...

 

Most noticeable change in change to Auto/AI on this first day is that the flow temp from the unit is sub 30deg and was 27deg when last checked! However its important to note the outside temp is around 13 deg so the ASHP is not having to work hard to maintain 21 deg in main living areas.

This post was modified 1 year ago by Tim441

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS


   
ReplyQuote
(@tim441)
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Joined: 2 years ago
Posts: 166
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Ahhhhh

 "Water function setting"  Only appeared if I change Select Temperature Sensor to Air + Water

20221230 150716

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS


   
Derek M reacted
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(@derek-m)
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Posted by: @tim441

Ahhhhh

 "Water function setting"  Only appeared if I change Select Temperature Sensor to Air + Water

20221230 150716

This is one of the annoying aspects of the LG system, since it is not clearly explained in the manual. Particularly since if my understanding is correct, the Air + Water mode can only work successfully if the air temperature measuring sensor is located in the heated room area and not in the airing cupboard.

Did you find out how to display the 'Seasonal Auto Temperature' settings?

This post was modified 1 year ago by Derek M

   
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(@tim441)
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In hindsight we could've easily put our controller somewhere where the air temperature would have been meaningful. If only installer advice was better! I'm going to try it even if in bathroom - will turn towel rail down so that the temp is nearer to house temp. But if it seems to create false readings and lower temps in rest of house I will revert to water sensor only. 

Not yet! Still looking for Seasonal Auto Temperature' settings.

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS


   
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(@orest)
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Posts: 3
 
Fifth

This is mine. To get into installer mode you probably know that you press the up arrow for a couple of secs in menu mode and then enter the code that's at the bottom of the screen. LG is tricky but it's been working fine for 9 months and I'm being paid to heat the house 😊 

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(@derek-m)
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Posted by: @orest
Fifth

This is mine. To get into installer mode you probably know that you press the up arrow for a couple of secs in menu mode and then enter the code that's at the bottom of the screen. LG is tricky but it's been working fine for 9 months and I'm being paid to heat the house 😊 

Third

 

First
Second
Fourth

Thank you for the information, much appreciated.

 


   
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(@derek-m)
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Posted by: @tim441

In hindsight we could've easily put our controller somewhere where the air temperature would have been meaningful. If only installer advice was better! I'm going to try it even if in bathroom - will turn towel rail down so that the temp is nearer to house temp. But if it seems to create false readings and lower temps in rest of house I will revert to water sensor only. 

Not yet! Still looking for Seasonal Auto Temperature' settings.

It would appear that you need to be in installer mode, as I suspected.

 


   
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(@tim441)
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@orest @derek-m I still can't see it in installer mode. I can see everything else.

Just wondering if it's a more recent controller hardware and/or software? Or needs smart control system called called ThinQ?

Fwiw... my system was installed Aug 2020 and is controller software 3.05.5a

I'm thinking this is the old version equivalent...After "Screed Drying setting" there are 3 settings (not in pdf) that I guess may be relevant.. currently set as following:

Outdoor Temp for Auto Mode
-6 Min   17 Max

Indoor Air Temp for Auto Mode
16 Min   21 Max

LWT for Auto Mode 
20 Min   45 Max

Changed the above settings following other suggestions. Not yet sure I've got optimum?

 

This post was modified 1 year ago 3 times by Tim441

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS


   
ReplyQuote



(@derek-m)
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Posted by: @tim441

@orest @derek-m I still can't see it in installer mode. I can see everything else.

Just wondering if it's a more recent controller hardware and/or software? Or needs smart control system called called ThinQ?

Fwiw... my system was installed Aug 2020 and is controller software 3.05.5a

If the particular capability is shown in the manual supplied with your system, then it should be available. Maybe an e-mail to LG Technical Help would answer the question.

I find the LG manuals quite incomprehensible and I have dealt with more complex industrial systems for many years. It is quite atrocious to have instructions within the manual that are either not normally accessible, or do not exist in the installed software.

The more I see of LG's equipment and capabilities, the more it convinces me never to buy one. 

 


   
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(@orest)
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@derek-m Hi Tim

On my system Auto mode is near the bottom of the list of about 12 options in Installer mode: ThinQ isn't needed. My system is about 9 months old and the number on the controller is 3.06.3a


   
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(@tim441)
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@derek-m I think you're right.. I will email my installer & LG.

in fairness I'm generally happy with the ASHP ... its just the dreadful instructions & lack of early advice from the installers. They installed (I think) a good system, at fair cost.

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS


   
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