Another 'Cool Energy' heatpumps thread

[HughF]

my suspicion is that I’ll need to spend a day or so playing with the PID settings. But for now, another fan coil to get on the wall.

[dpmiller]

remind us what "stop temp differential" you're set to- increasing that a degree might well save ploughing through the PID stuff too much

[HughF]

40 minutes ago, dpmiller said:

remind us what "stop temp differential" you're set to- increasing that a degree might well save ploughing through the PID stuff too much

I’ve bumped it to 5 degrees, it was at 1…. And it’s been running for the last 20 mins without stopping 👍 It’s ramping up and down, but it hasn’t stopped.

 

I also bumped the weather comp up 1 degree as it was a little low at the current OAT.

 

kP is 5c

kI is 100 secs (iirc)

kD is 0

Edited November 26, 2023 by HughF

[HughF]

Still going, using 930w from the mains - finally….

[JohnMo]

5 hours ago, HughF said:

Still going, using 930w from the mains - finally….

Sounds good

[HughF]

57 minutes ago, JohnMo said:

Sounds good

Yeah, been working well today, after some hard work this morning recovering from being off from 23:30 till 05:30. Seems to be ticking along quite happily at the lowest modulation, until it warmed up this afternoon.

[HughF]

Dragging this thread kicking and screaming into 2025, it looks like some interesting developments by Chris and the team at SPRSUN over in China:-

 

£1700 gets you the new, inverter driven version of the old 'Pro' unit - in a more sensible 6kW output

https://coolenergyshop.com/collections/air-source-heat-pumps/products/proinverter-air-source-heat-pump-6kw

 

That's a decent price. No idea if it's built on the Carel platform, for that money I expect not, but it has a particularly wide modulation ratio - considerably wider than their r290 unit, or the older r410a units that I, Marvin and dpmiller are running.

Edited January 23 by HughF

[alfaTom]

Thanks for the update @HughF. I'm currently in the process of arranging delivery of an ASHP & UVC from CoolEnergy via their MCS grant service. All the other installers wanted an extra £6k on top of the BUS, whereas CoolEnergy can supply the units and do the commissioning for the grant effectively "free" as long as I can arrange the install.

 

I'm looking at the CE-IVT10-EVI which is billed as 4.89kW - 10.47kW @A-3/35.
There is a newer model, the CE-ET10 but the capacity on this was slightly smaller at 3.89kW - 7.46kW @A-3/35). It's not on their website yet as far as I can tell. I've attached the spec sheet incase it helps anyone else.

 

Once I've got hold of the kit I'll report back on ease of install & findings.

 

CE-ET10 (QR).pdf

[Dillsue]

On 26/02/2025 at 21:38, alfaTom said:

Thanks for the update @HughF. I'm currently in the process of arranging delivery of an ASHP & UVC from CoolEnergy via their MCS grant service. All the other installers wanted an extra £6k on top of the BUS, whereas CoolEnergy can supply the units and do the commissioning for the grant effectively "free" as long as I can arrange the install.

 

I'm looking at the CE-IVT10-EVI which is billed as 4.89kW - 10.47kW @A-3/35.
There is a newer model, the CE-ET10 but the capacity on this was slightly smaller at 3.89kW - 7.46kW @A-3/35). It's not on their website yet as far as I can tell. I've attached the spec sheet incase it helps anyone else.

 

Once I've got hold of the kit I'll report back on ease of install & findings.

 

CE-ET10 (QR).pdf 608.35 kB · 9 downloads

Have CE done their MCS design to size your heat pump at 10.5kw? Did you or anyone else check their sizing?

[alfaTom]

9 hours ago, Dillsue said:

Have CE done their MCS design to size your heat pump at 10.5kw? Did you or anyone else check their sizing?

CE are working from my sizing - heatpunk shows roughly 8kW heat loss for the property.

Couldn't get any heatgeeks or other engineers to attend to review and they all quoted £14k+ to fit ASHP & UVC.

[MikeSharp01]

18 hours ago, Dillsue said:

CoolEnergy via their MCS grant service

We are looking to do the same with them, we are awaiting the MCS certification of their tiny unit Pro Inverter Air Source Heat Pump | CE-iH6 | 1.74kW - 6kW to move ahead on it, it has great modulation depth and we, if I have my calculations correct, will only need about 2kW at -3 so it should cover us. Everybody else quoted silly money above the BUS grant.

[SteamyTea]

8 minutes ago, MikeSharp01 said:

We are looking to do the same with them, we are awaiting the MCS certification of their tiny unit Pro Inverter Air Source Heat Pump | CE-iH6 | 1.74kW - 6kW to move ahead on it, it has great modulation depth and we, if I have my calculations correct, will only need about 2kW at -3 so it should cover us.

Kind of unit that would also suit me.  They have 2 left in stock.

But where is the data sheet about it?

[Gone West]

17 minutes ago, SteamyTea said:

But where is the data sheet about it?

https://cdn.shopify.com/s/files/1/2612/5402/files/Cool_Energy_CE-iH6_Pro_Inverter_Air_Source_Heat_Pump_Datasheet.pdf?v=1721657221

 

[SteamyTea]

@Gone West

Thanks

I am assuming there is a typo in the datasheet.  9.3 kW input seems a bit high for a 6 kW HP.

[Beelbeebub]

1 minute ago, SteamyTea said:

@Gone West

Thanks

I am assuming there is a typo in the datasheet.  9.3 kW input seems a bit high for a 6 kW HP.

9 is next to 0 so 0.3kw?

[MikeSharp01]

 

18 minutes ago, Beelbeebub said:

9 is next to 0 so 0.3kw?

Yes one is forced to assume so, or something similar, or this machine is able to warp physics. It has been like that forever and I told them about when I enquired. I guess it's a small company trying to do a good job but it can't quite yet sweep in all the corners. All my dealings with them have been good, professional and supportive. 

[Wil]

CE’s MCS route worked well for me under the old RHI scheme- Friendly surveyor came out once I’d confirmed install and did the MCS cert and submitted. Job’s a good’un.

 

Had a few foibles with my 3phase 18kW unit but mostly around the compressor terminals causing tripping issues. Fixed now with a new set of connectors recommended by Chris.

[Bramco]

@Wil @MikeSharp01 @alfaTom

 

Looks like you all have been through the CE MCS scheme and self installed.

 

I'm assuming that when the unit arrived, there was some detail on what connections to make between the indoor Carel user interface and the ASHP itself.  I've worked out which additional connections can be used to switch between Heating and Cooling but can't work out how to turn off Hot Water. So wondered if the connection instructions you received had this info?

 

[MikeSharp01]

1 hour ago, Bramco said:

Looks like you all have been through the CE MCS scheme and self installed.

Not us yet we are going through the process - we have prepared all the ground including UFH, manifold, In and Out 28mm pipework, control cabling, power supplies. We are just waiting for the chosen ASHP to get its MCS certificate. 

[HughF]

@Bramco I’ll dm you the rj11 colours/pinouts for the carel pLAN wiring.

[HughF]

@BramcopLAN wiring, for extending the display/controller:

 

Thanks for the email,

 

At the PCB end, there is actually some screw terminals just above the RJ11 jack, this is 4 pins for the power and data so you can use this one end and disregard the plug.

 

For the screen end, you can use a RJ11 adapter with 6 pins, from memory the two outer pins are live and the 2^nd two outer pins are neutral. The middle pins are + / - data. (Carel double the power cables up to overcome volt drops on the prewired cables) A standard CAT6 cable is normally fine for upto 30m runs though.

 

Best regards

Edited Monday at 15:28 by HughF

[Bramco]

Thanks

[Wil]

@Bramco If you’re just looking for how to turn off HW and run in heating or cooling only- need to set the Carel controller to OFF first then under ‘user controls’ you can cycle through the options. Stumped me for a bit that it had to be OFF.

 

For the wiring, mine was a simple RJ45 between indoor and outdoor. I can talk you through connections with pictures if needed. 

[Bramco]

@Wil thanks and I know how to do the change manually - there's a few owners on another thread trying to work out how to do it automatically.

 

I wonder if we maybe haven't the same unit - mine is wired using pairs on a cat5 cable, not through an rj45 connector. Do you have the pinout for your connector.

[Wil]

Ah sorry, misunderstood the question. I spent ages looking at the pin config for the cat5 because my 26 came without the pre-wired RJ45 connectors. I’ll have to go back and look again.

 

I’ve honestly only briefly run them in cooling as far as the buffer as my internal pipework isn’t properly insulated.

 

Look forward to the day I can actually run them for cooling!