Home Page link

Three phase AC

Home| Search | About
Login Password
Register Now! Lost Password?

Home Repair - - If it ain't broken, don't fix it. Otherwise look here. 

Page 1 of 2       1 2 > last >> Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Three phase AC Parsons@datasync.com 07-29-2005
---> Re: Three phase AC Edwin Pawlowski07-29-2005
|--> Re: Three phase AC Carolina Breeze...07-30-2005
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by Parsons@datasync.com on July 29, 2005, 3:33 pm


I'm getting ready to install a new 5 ton compressor and handler in the
house I'm renovating in New Orleans. When the contractor came out to
evaluate the situation we discovered that the old units were Three
phase 240 volt compressors. The electrical contractor seems to think
that 3 phase units will cost a lot more but will save me money in the
long haul. It's already wired for three phase so I will have to rewire
if I change to single phase. The ac contractor said there probably
won't be any significant savings running three phase equipment and I
could only get up to 12 seer in three phase units. He's pricing both
senarios so we can have some information to use for the decision. Does
anyone have any suggestions or facts that might help me in making my
decision.



PexSupply QuikTrak 468x60
Posted by Edwin Pawlowski on July 29, 2005, 11:00 pm



> I'm getting ready to install a new 5 ton compressor and handler in the
> house I'm renovating in New Orleans. When the contractor came out to
> evaluate the situation we discovered that the old units were Three
> phase 240 volt compressors. The electrical contractor seems to think
> that 3 phase units will cost a lot more but will save me money in the
> long haul. It's already wired for three phase so I will have to rewire
> if I change to single phase. The ac contractor said there probably
> won't be any significant savings running three phase equipment and I
> could only get up to 12 seer in three phase units. He's pricing both
> senarios so we can have some information to use for the decision. Does
> anyone have any suggestions or facts that might help me in making my
> decision.

What is your power factor? Have you talked to the utility company?

There are a few factors here. Some electric utilities will assist you in
installing more efficient equipment. You tell them I can buy a single phase
SEER 10 unit for $9000, but the SEER 12 unit is $11,500. You may get a
portion of that $2500 difference from them.

..Three phase will allow you to run smaller wires saving money on
installation.




Posted by RP on July 29, 2005, 6:07 pm




Edwin Pawlowski wrote:

>
>>I'm getting ready to install a new 5 ton compressor and handler in the
>>house I'm renovating in New Orleans. When the contractor came out to
>>evaluate the situation we discovered that the old units were Three
>>phase 240 volt compressors. The electrical contractor seems to think
>>that 3 phase units will cost a lot more but will save me money in the
>>long haul. It's already wired for three phase so I will have to rewire
>>if I change to single phase. The ac contractor said there probably
>>won't be any significant savings running three phase equipment and I
>>could only get up to 12 seer in three phase units. He's pricing both
>>senarios so we can have some information to use for the decision. Does
>>anyone have any suggestions or facts that might help me in making my
>>decision.
>
>
> What is your power factor? Have you talked to the utility company?
>
> There are a few factors here. Some electric utilities will assist you in
> installing more efficient equipment. You tell them I can buy a single phase
> SEER 10 unit for $9000, but the SEER 12 unit is $11,500. You may get a
> portion of that $2500 difference from them.
>
> .Three phase will allow you to run smaller wires saving money on
> installation.

But you'll need more of them :)

hvacrmedic




Posted by Duane Bozarth on July 30, 2005, 9:47 am


RP wrote:
>
> Edwin Pawlowski wrote:
>
> >
....
> > .Three phase will allow you to run smaller wires saving money on
> > installation.
>
> But you'll need more of them :)

But he's got existing equipment so it's already wired...


Posted by Carolina Breeze HVAC on July 30, 2005, 7:09 am



> I'm getting ready to install a new 5 ton compressor and handler in the
> house I'm renovating in New Orleans. When the contractor came out to
> evaluate the situation we discovered that the old units were Three
> phase 240 volt compressors. The electrical contractor seems to think
> that 3 phase units will cost a lot more but will save me money in the
> long haul. It's already wired for three phase so I will have to rewire
> if I change to single phase. The ac contractor said there probably
> won't be any significant savings running three phase equipment and I
> could only get up to 12 seer in three phase units. He's pricing both
> senarios so we can have some information to use for the decision. Does
> anyone have any suggestions or facts that might help me in making my
> decision.
>

3 phase units are normally considered commercial apps, and normally do cost
a bit more initially, but not always.
14 SEER 208-240VAC 3Ph units are out there, and with the 13SEER ruling in
effect Jan1, 2006, you can for sure find 13 SEER units already, but
suggestion....in your area, higher SEER will not always mean cheaper to run.
Moisture removal will be your highest priority, and unless your contractor
is familiar with setting up the higher SEER equipment for this, you could
prob save money with a 12 SEER and no higher unit.
Its your home...how high of a SEER did you want? 14? 16?
If you want to go say, 16 SEER and need to re-wire, you need to consider
this...what is the cost savings, VS the initial outlay for the re-wire and
equipment? Your contractor SHOULD be able to figure you out a cost savings
spreadsheet and if he cant, then find another contractor. Licence
requirements ini your area are spotty at best and any hack with a set of
guages can call himself a contractor.

Get firm quotes on:
Electrical re-wire.
Equipment and labor, both in 3ph and single.

Then have your cost savings sheet in front of you and then determine if the
extra $50 a year is worth the extra $$ for the rewire and keep in mind,
average life expectancy of any new unit in that clime is about 12-14 years,
tops.




Page 1 of 2       1 2 > last >>
Similar ThreadsPosted
3-phase used for 1-phase (split-phase) power July 20, 2006, 12:16 am
Single Phase Backup Generator to Three Phase Mains Supply? January 22, 2008, 2:28 am
Single phase vs. three phase air conditioning February 3, 2006, 12:59 am
I have FOUR phase electricity January 2, 2008, 7:46 am
Where can I get plugs to fit this three phase socket? October 22, 2005, 3:21 am
240 V breaker/phase question October 31, 2005, 11:55 am
Three phase for a resistance load?? September 20, 2006, 8:14 am
My $45 homemade 10 HP phase converter is WORKING!!! July 28, 2005, 2:44 am
Single phase manual motor starter November 5, 2006, 10:11 am
Low pressure water pump, single or triple phase? February 6, 2006, 5:54 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap