LG Therma V capabilities

[JamesPa]

Until recently I had dismissed LG because I was looking for 11-12kW single fan (based on calculated heat loss) with sound power of 60dB(A) or less (to meet pd sound levels).  This combo of specs basically comes down to mitsubishi or samsung ht, from the commonly available brands, so far as I have been able to determine.

 

But this winter I measured max 7.5kW even during the sustained cold snap in November.  So the LG 9kW unit (which seems to be available cheaply and seems to be well specified) is now a distinct contender, albeit that the appearance isn't going to win design awards!

 

However nowhere can I find specs for modulation capability, min flow rate (given that ch14 low flow rate seems to be a notorious problem), and whether it does timed setback of flow temp.  Can anyone who has one advise enlighten (obviously I'd also appreciate any other comments on this machine and have read most of the posts here which obviously discuss it).

Edited April 15, 2023 by JamesPa

[ReedRichards]

I have a 12 kW monobloc unit from late 2020.  I got a third party controller for my heating, which I rather regret as it means I can't use the Load Compensation feature (called Air + Water control).

 

I've never seen specs for modulation capability.  Unlike some heat pumps it starts off at low power and works its way up.  The minimum stable power seems to be about 2.5 kW, possibly less in warm weather.

 

I don't know the minimum flow rate.

 

You can control the heat pump by flow temperature or a combination of flow and room temperature if you use the LG controller.  Although you can manually adjust the weather-compensated flow temperature by +/- 5^oC, I don't think you can program that.  Programming a set-back room temperature might have the same effect.

 

[DanDee]

2 hours ago, JamesPa said:

Until recently I had dismissed LG because I was looking for 11-12kW single fan (based on calculated heat loss) with sound power of 60dB(A) or less (to meet pd sound levels).  This combo of specs basically comes down to mitsubishi or samsung ht, from the commonly available brands, so far as I have been able to determine.

 

But this winter I measured max 7.5kW even during the sustained cold snap in November.  So the LG 9kW unit (which seems to be available cheaply and seems to be well specified) is now a distinct contender, albeit that the appearance isn't going to win design awards!

 

However nowhere can I find specs for modulation capability, min flow rate (given that ch14 low flow rate seems to be a notorious problem), and whether it does timed setback of flow temp.  Can anyone who has one advise enlighten (obviously I'd also appreciate any other comments on this machine and have read most of the posts here which obviously discuss it).

do you have the data book?

 

https://www.irishellas.com/files/Engineering-Product-Data-Book_Monobloc_Gen.2-R32,50Hz-_MFL66101126_5BPM5-01C-Mar.2022-.pdf

 

https://gathering.tweakers.net/forum/list_messages/2017448/last 80 pages of dutch user experience, click right/translate english, top search "minimum"

Edited April 15, 2023 by DanDee
dutch link

[HughF]

Cool Energy 9kW has programmable flow temp setback and is a capable unit.

[sharpener]

1 hour ago, HughF said:

Cool Energy 9kW has programmable flow temp setback and is a capable unit.

 

And quieter than the Grant and easy to interface with (mostly) external voltage-free contacts (though I was not looking at the 9kW specifically)

[SuperJohnG]

2 hours ago, HughF said:

Cool Energy 9kW has programmable flow temp setback and is a capable unit.

 

39 minutes ago, sharpener said:

 

And quieter than the Grant and easy to interface with (mostly) external voltage-free contacts (though I was not looking at the 9kW specifically)

Yea but their warranty is return to base. That's just not feasible in my mind. 

[JamesPa]

7 hours ago, HughF said:

Cool Energy 9kW has programmable flow temp setback and is a capable unit.

Only 7.3kW at -3 though, not enough for my application.

[HughF]

1 hour ago, JamesPa said:

Only 7.3kW at -3 though, not enough for my application.

Understood… back to the LG, from what I’ve seen it looks like a nice unit, with the ability to do weather and load compensation.