split ac unit different capacity value

[kefah]

Hi
how r u guys
im confused about the info on the name plate of different split ac unit
as example when u check the heating and cooling capacity u will find the cooling is 6740 watt
and heating is 7320 watt


http://im89.gulfup.com/68eP0g.png

also u can check in other split ac unit that the current
are different or same in cooling or heating
what is the reason

[The Viking]

OK,
If we go back to fundamentals, the heat output from the condensor=the cooling duty of the evaporator + the heat added by the compressor.
Therefore the the capacity in heating mode will be higher than the capacity in cooling mode (heat=cooling+compressor).

In modern A/C systems, in order to optimise performance, the discharge pressure is elevated during the heating cycle. Higher pressure = higher temperature.
If you look at the spec of a compressor you will see that higher discharge pressure=higher current draw.

Clear as murky waters!

:cool:

[kefah]

ok
thank u for the detailed explain
i red in the college some of what u mentioned
ok
why in some mini split heat pump unit the current for heating is lower than in cooling
as example
http://im89.gulfup.com/yNhswA.png

[The Viking]

As they have chosen to keep the duties the same in both modes they will be able to run the compressor at a reduced duty whilst in heating mode. (If we follow the same principle as above)

:cool:

[moideen]

As they have chosen to keep the duties the same in both modes they will be able to run the compressor at a reduced duty whilst in heating mode. (If we follow the same principle as above)

:cool:
I think they (konka) have done some mistakes on writing heating capacity. It is simple 2 ton system. Look at the power input, it is different. I googled for the catalogue, no found.this is Chinese made,there is chance for mistakes..........:o

[kefah]

I think they (konka) have done some mistakes on writing heating capacity. It is simple 2 ton system. Look at the power input, it is different. I googled for the catalogue, no found.this is Chinese made,there is chance for mistakes..........:o

thank
what about this unit
its LG Korean made
http://im89.gulfup.com/68eP0g.png