Air Source Heat Pumps

mikedain

richardc1983 wrote: »

that sound is the sound of the compressor, all a/cs make that sound although not as aggresive as yours seems.

possibly dirt? maybe a thorough clean/service will sort it?

richardc1983

I wouldnt even bother looking at that Mike, you should go for something like this at a least.

http://www.orionairsales.co.uk/mitsubishi-heavy-industrial-srk35zg-s-39kw-12000-btu-inverter-air-conditioning-12-p.asp

Its more money but its a branded name with reliabiliity.

The easy fit a/c are terrible and unreliable.

thechippy

Mike,

If it's fixed speed they don't ramp down. The comp speed is constant. The noise however, can vary with the amount of load on the system at the time.
It did sound more noisy than it should from the video, but it's hard to tell without hearing it in the flesh. If in doubt have it checked, as if the comp fails, they are pretty expensive to replace. It could be something simple which could save the comp if looked at in time.
BTW, it's worth avoiding the more unheard of a/c makes. After a short time they often disappear from the market and spares / backup is impossible.

Hope this helps.

Hi Richard, you ok?......;)

mikedain

richardc1983 wrote: »

I wouldnt even bother looking at that Mike, you should go for something like this at a least.

http://www.orionairsales.co.uk/mitsubishi-heavy-industrial-srk35zg-s-39kw-12000-btu-inverter-air-conditioning-12-p.asp

Its more money but its a branded name with reliabiliity.

The easy fit a/c are terrible and unreliable.

what do you think of these guys:
http://cgi.ebay.co.uk/BERGDORF-INVERTER-12K-BTU-AC-HEAT-30-50-LESS-2-RUN_W0QQitemZ260432904825QQcmdZViewItemQQptZUK_Home_Garden_Hearing_Cooling_Air?hash=item3ca302c279&_trksid=p3286.c0.m14&_trkparms=65%3A2%7C66%3A2%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50

http://www.diy.com/diy/jsp/bq/nav.jsp?action=detail&fh_secondid=9333251&fh_view_size=20&fh_eds=%3f&fh_location=%2f%2fcatal!!!1%2fen_GB%2fcategories%3C{9372015}%2fcategories%3C{9372041}%2fcategories%3C{9372226}&fh_refview=lister&ts=1246569424824&isSearch=false#reviews


also apparently daikin and gree have teamed up for manufacturing, see:
http://www.daikin.com/press/2009/090218/index.html

mikedain

thechippy wrote: »

Mike,

If it's fixed speed they don't ramp down. The comp speed is constant. The noise however, can vary with the amount of load on the system at the time.
It did sound more noisy than it should from the video, but it's hard to tell without hearing it in the flesh. If in doubt have it checked, as if the comp fails, they are pretty expensive to replace. It could be something simple which could save the comp if looked at in time.
BTW, it's worth avoiding the more unheard of a/c makes. After a short time they often disappear from the market and spares / backup is impossible.

Hope this helps.

thanks for checking my video, it is an inverter so when it ramps down the buzzing goes away, but on full ramp its not great at all.

richardc1983

mikedain wrote: »

whoops, just seen that is fixed system, not inverter.

?

U said here that it was a fixed speed system?



I wouldnt bother with either of those makes yet alone the B&Q system theyh dont even do an inverter model any more only fixed speed.

That document about daikin and gree does not mention airforce or b&q units.

mikedain

richardc1983 wrote: »

U said here that iwas a fixed speed system?



I wouldnt bother with either of those makes yet alone the B&Q system theyh dont even do an inverter model any more only fixed speed.

That document about daikin and gree does not mention airforce or b&q units.

mikedain wrote:

what do you think of this for a new system:

http://www.orionairsales.co.uk/easy-...-btu-806-p.asp

whoops, just seen that is fixed system, not inverter.

no no i mean that the one that i first looked at on orionsales site was a fixed system.

my gree is definitely an inverter.

the document on daikin site was to show daikin and gree have teamed up.

richardc1983

Ah rite ok, I have heard of this story before, they will be built in same factory but will be to a totally different specification, a lot of ac unit can contain parts from other manufacturer, for example Mitsubishi Electric compressors can be found in cheaper units etc. However its the control strategy and quality of other parts that fail it.

mikedain

richardc1983 wrote: »

Ah rite ok, I have heard of this story before, they will be built in same factory but will be to a totally different specification, a lot of ac unit can contain parts from other manufacturer, for example Mitsubishi Electric compressors can be found in cheaper units etc. However its the control strategy and quality of other parts that fail it.

im inclined to go with a cheap inverter, as this is for the current baby room which is really small, if a single bed was in there, there wouldnt be much more room to swing a cat! so i dont really want to spend the extra £250 for a decent system as you have recommended.
also there is an airbrick into the baby room where on the other side there is a small balcony (not used). so it is perfect to put the outdoor unit on the balcony, and have the pipework going through the airbrick.

so on that basis, would it be good to go for either airforce from b&q or bergdorf (german)

richardc1983

If this is a small baby room I would suggest you make sure you size the unit up correctly as if you get too large a unit you will get uncomfortable drafts for baby and the unit will spend its time short cycling (switching on and off all the time) even though they are inverter there is only a certain margin they can ramp down to it wont remove much moisture if its too big a unit as it will be cooling too quickly even if ramped down.

3.5kws for a small room is very large. I would get the smallest unit you can find if its a very small room.

Where is the other unit situated?