AC wattage

[Toros]

Hi,
What is wattage (approxm) of 5-ton use, old air condition unit and
what is the wattage on 5-ton AC, SEER 17, efficient , new ??????

Thank you

 

[junkhound]

Hi,
What is wattage (approxm) of 5-ton use, old air condition unit and
what is the wattage on 5-ton AC, SEER 17, efficient , new ??????

Thank you

One needs to know the inside and outside wet and dry bulb temperatures for an accurate answer.

You can find it yourself, look at the spec sheets on the various mfg web sites.

fwiw, for a HP vs. AC, I know that when my own gshp is putting out 59,000 btu hr at 69F house temp and 56F ground temp, wattage is 3.52 kW. Yer 17 SEER will be higher and a very old 10 SEER a LOT higher, maybe 2X.

 

[Toros]

One needs to know the inside and outside wet and dry bulb temperatures for an accurate answer.

You can find it yourself, look at the spec sheets on the various mfg web sites.

fwiw, for a HP vs. AC, I know that when my own gshp is putting out 59,000 btu hr at 69F house temp and 56F ground temp, wattage is 3.52 kW. Yer 17 SEER will be higher and a very old 10 SEER a LOT higher, maybe 2X.

no time to do that
i need estimation
for service load calc

 

[junkhound]

no time to do that
i need estimation
for service load calc

7.2618 kW; Based on ASHRE 40.8C design temp for Burbank, 80F indoor, 17 SEER

Folks at HVAC-talk.com can give a more accurate number if make and model provided.































btw, treated this query since 'don't have time' to look up number in 2 minutes, as a political pole - I lied.....

 

[NewHorizons]

EER=BH/W, SEER is EER adjusted for seasonal changes

EER=BH/W, SEER is EER adjusted for seasonal changes

For ballpark W. 5-tons = 60,000 BH. (1-ton=12,000 Btu/hr); Btu/hr =BH.

W=BH/SEER. Watts will be seasonal average since using SEER.

So, 60,000 BH / 17 BH/W= 3,529 W.

The SEER of an older unit would be around 11 BH/W.

So, 60,000BH / 11 BH/W = 5,454W.

I hope this helps. Good luck!

NH

 

[kwired]

no time to do that
i need estimation
for service load calc

If doing a load calculation for a service or feeder all that really matters is the VA rating - that should be able to be determined from the nameplate.

Actual draw may be less most of the time, but you need to design to be able to run at it's rating.

 

[NewHorizons]

Yes, using SEER and capacity of the unit to estimate the Watts would be beneficial to see if the unit is running properly (comparing measured/metered Watts to calculated Watts) or to estimate energy consumption, not for electrical requirements. For that, nameplate MCA and MOCP (MOPD) must be used.

Good luck,
NH