ASHP Query

[Worcester]

Have you done any Samsung splits yet Mr Worcester

Hi Jason, not yet with Samsung, we've used others and find installing splits quite straightforward. Often easier than mono's as the hyrdonics unit is more flexibly positioned than having to run heating pipework outside. All of our systems to date have been high end / high specification systems, sometimes cascaded, and frequently involve the complete refurbishment of all aspects of the heating and DHW system. Most of our clients are up at the 17-20kW (or greater) heat load requirement even with all the energy efficiency measures installed. So when you get down below 3° we frequently will do a hybrid system so as keep the HP working at it's higher CoP's.

(This is turning into the Green Room already )

 

[jason121]

Just read Panasonic have a 16kw TCAP on the market.

 

[jason121]

Hi Jason, not yet with Samsung, we've used others and find installing splits quite straightforward. Often easier than mono's as the hyrdonics unit is more flexibly positioned than having to run heating pipework outside. All of our systems to date have been high end / high specification systems, sometimes cascaded, and frequently involve the complete refurbishment of all aspects of the heating and DHW system. Most of our clients are up at the 17-20kW (or greater) heat load requirement even with all the energy efficiency measures installed. So when you get down below 3° we frequently will do a hybrid system so as keep the HP working at it's higher CoP's.

(This is turning into the Green Room already )

You will have to post some pictures, would like to see the installation

 

[Marvo]

If you work on a refrigeration system is it necessary to use a recovery unit? Can't you just pump the gas down out of the system into the condensing unit and close service valves? This is how many of the new units are delivered with pre-charge so surely it would be compliant for a relocation and would still allow the pipework and indoor unit to be vacuum tested.

 

[Worcester]

If you work on a refrigeration system is it necessary to use a recovery unit? Can't you just pump the gas down out of the system into the condensing unit and close service valves? This is how many of the new units are delivered with pre-charge so surely it would be compliant for a relocation and would still allow the pipework and indoor unit to be vacuum tested.

Yes, No, No.

The f-gas regulations are very strict.

 

[solarsavings]

Well I think you can pump down and move the unit provided you know there is no more refrigerant in the unit than it came with.(mi's will tell you) If there is, then you have to recover it.

 

[Gavin A]

anyone know if it's allowed under MCS to put the heat pump control unit in a locked box and not give the client the key?

'the heat pump's not heating the house properly, can we not just turn it up to 55 degrees?'

turned out to be that the unit had magically turned itself onto quiet mode, so was running at half output.

 

[Worcester]

You mean like disconnecting the thermostat in the hall that the missus keeps turning up and down and instantly feels warmer when she's done it ? (Could NEVER admit to configuring our house that way )

At least most system logs tell you what was done and when.

Call out charges in the contract helps, where logs indicate what has been changed..

 

[SRE]

Thanks guys for all the posts. So although it's an expensive job to do, I'm picking up that £3,100 is still quite expensive?? I'm really not aware of anyone with any expertise in our area that I could recommend to our customer. What's the best forward for her? She's really not happy using the original company but I'm not sure what her alternative is?

 

[jason121]

All you need is a good air conditioning firm to move the outside unit. There will remove gas, re braze pipe vac out and fill up. A day at most. Maybe need plumbing to check heating system works ok

 

[SRE]

That won't impact on MCS certificate will it? We have a really good air con company locally who might be interested. I've tried not to get too involved in it but we're red hot on customer care which sometimes opens us up to problems we don't really want to get involved in .

The original installers haven't installed the pipework properly, kinks in the pipe, 3 compression joints in 600mm, nick in another pipe, concrete/tiles cracked where the underfloor heating has gone in - limestone floor has had to be lifted to re-pipe she's really upset about it all - it was supposed to be their dream home for retirement.

 

[jason121]

I doubt it will. Might mess the warranty up with original installer. Do they have there MCS certificate

 

[SRE]

Yes they have the MCS - I think the ashp is out of installer warranty anyway, it was installed 2 1/2 years ago.

 

[jason121]

I would use your air con guy to move it.