Need help to figure out the difference

[kkwong0]

Hi all,
I'm looking for a 2 HP, and a local vendor propose a 2-1/4 horse Bristol H23B30QDBE as shown in his spec below. But when I doublechecked the spec from Bristol (below as well), the compressor has a BTUH of 30100. If I got it rite, 30100 is approx 11.8 HP or 8.8 kilowatts. I could have probably missed out something here....

Another question:
@45/100 - @45/130: Do these values on the Bristol catalogue refer to the compressor capacity at the SST of 45 degree and SCT at 100 or 130 degree?

Please advice, thks



Bristol compressor
Model: H23B30QDBE

Vendors' spec:
===========
CV: 2-1/4
Capacity in Watts at +5°C: 6,666
Capacity in Watts at 0°C: 5,326
Capacity in Watts at -5°C: 4,147
Capacity in Watts at -10°C: 3,122



Spec below is from Bristol catalogue:
===========================

@45/130
---------
Capacity BTU/H: 30100
Capacity WATTS: 8832
Motor input watts: 3100
ERR/COP BTU/WH: 9.7
ERR/COP W/W: 2.8

@45/100
---------
Capacity BTU/H: 37626
Motor input watts: 2503
EER BTU/WH: 15.0

[kkwong0]

Hi I'm sorry, I posted the thread at the wrong place, pls forgive

[Magoo]

hi KKwong0.
it would seem the 45/100 and 45/130 are ratings in degrees F. SST/ SCT.

[kkwong0]

Hi Magoo, yap I need to convert F to C. any idea about the HP difference?
Btw, I supposed that the current thread was not at the right place. I reposted it under "technical discusion" yesterday, and the thread vanished this morning. deleted by moderators? any reason?
thks

[Magoo]

Hi kkwong0.
you are confusing yourself with SI metric( watts )and old imperial ratings( Btus ).
The Bristol model number gives a nominal rating at a guess, the 23 is nominal 2.3 HP, the 30 is nominal btu x 1000 rating. Depending on SCT the drawn motor watts will change,
what was the original compressor rated capacity in either watts or Btu's, what are the operating conditions design SST /SCT.