If you were Registered and logged in, you could reply and use other advanced thread options
|
Posted by theblooms on September 10, 2007, 7:34 pm
We moved our laboratory from Seattle to South Carolina, and we brought
our Data Aire Mini Ceiling 2 ton unit with us. We have it hooked up
to 240V and it is up and running great, but the application tag on the
unit actually says that it is supposed to be 277V.
So, because we are running it 13% under-voltage, is this thing going
to go south on us in a hurry? Our lab walls have 60mil waterproof TPO
roofing material on the outside for a vapor barrier, R30 in the 2x12
walls and ceiling, and 6mil polyvinyl for a vapor barrier on the
inside of the lab insulation behind the sheetrock as an internal vapor
barrier. There is the same 6mil polyvinyl on both sides of the R30
ceiling insulation as well. The room is WELL INSULATED and TIGHT, so
I don't think the unit is actually going to be running very hard to
maintain the temp (74 degrees) and humidity (50%).
Is this going to work long term, or is there something that we can
change around to make it live better?
|
|
Posted by on September 10, 2007, 7:44 pm
On Mon, 10 Sep 2007 16:34:11 -0700, theblooms
>We moved our laboratory from Seattle to South Carolina, and we brought
>our Data Aire Mini Ceiling 2 ton unit with us. We have it hooked up
>to 240V and it is up and running great, but the application tag on the
>unit actually says that it is supposed to be 277V.
>So, because we are running it 13% under-voltage, is this thing going
>to go south on us in a hurry?
Yes.
> Our lab walls have 60mil waterproof TPO
>roofing material on the outside for a vapor barrier, R30 in the 2x12
>walls and ceiling, and 6mil polyvinyl for a vapor barrier on the
>inside of the lab insulation behind the sheetrock as an internal vapor
>barrier. There is the same 6mil polyvinyl on both sides of the R30
>ceiling insulation as well. The room is WELL INSULATED and TIGHT, so
>I don't think the unit is actually going to be running very hard to
>maintain the temp (74 degrees) and humidity (50%).
>Is this going to work long term, or is there something that we can
>change around to make it live better?
Ask an electrician to spec out a buck-boost transformer for
it. If he doesn't know what it is, or how to do it, ask a different
electrician.
--
Click here every day to feed an animal that needs you today !!!
http://www.theanimalrescuesite.com/
Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/
|
|
Posted by theblooms on September 10, 2007, 8:09 pm
Thank you, I'll look into that. Hopefully it will be OK until Monday
9/17. We have our lab certifications and audits all this week, so
taking it down now is a NON-OPTION.
On 10 Sep, 19:44, .p.jm@see_my_sig_for_address.com wrote:
> On Mon, 10 Sep 2007 16:34:11 -0700, theblooms
> >We moved our laboratory from Seattle to South Carolina, and we brought
> >our Data Aire Mini Ceiling 2 ton unit with us. We have it hooked up
> >to 240V and it is up and running great, but the application tag on the
> >unit actually says that it is supposed to be 277V.
> >So, because we are running it 13% under-voltage, is this thing going
> >to go south on us in a hurry?
> Yes.
> > Our lab walls have 60mil waterproof TPO
> >roofing material on the outside for a vapor barrier, R30 in the 2x12
> >walls and ceiling, and 6mil polyvinyl for a vapor barrier on the
> >inside of the lab insulation behind the sheetrock as an internal vapor
> >barrier. There is the same 6mil polyvinyl on both sides of the R30
> >ceiling insulation as well. The room is WELL INSULATED and TIGHT, so
> >I don't think the unit is actually going to be running very hard to
> >maintain the temp (74 degrees) and humidity (50%).
> >Is this going to work long term, or is there something that we can
> >change around to make it live better?
> Ask an electrician to spec out a buck-boost transformer for
> it. If he doesn't know what it is, or how to do it, ask a different
> electrician.
> --
> Click here every day to feed an animal that needs you today
!!!http://www.theanimalrescuesite.com/
> Paul ( pjm @ pobox . com ) - remove spaces to email me
> 'Some days, it's just not worth chewing through the restraints.'
> 'With sufficient thrust, pigs fly just fine.'
> HVAC/R program for Palm PDA's
> Free demo now available onlinehttp://pmilligan.net/palm/
|
|
Posted by on September 10, 2007, 9:07 pm
On Mon, 10 Sep 2007 17:09:03 -0700, theblooms
>Thank you, I'll look into that. Hopefully it will be OK until Monday
>9/17. We have our lab certifications and audits all this week, so
>taking it down now is a NON-OPTION.
Then have smoke detectors handy and tested.
>On 10 Sep, 19:44, .p.jm@see_my_sig_for_address.com wrote:
>> On Mon, 10 Sep 2007 16:34:11 -0700, theblooms
>> >We moved our laboratory from Seattle to South Carolina, and we brought
>> >our Data Aire Mini Ceiling 2 ton unit with us. We have it hooked up
>> >to 240V and it is up and running great, but the application tag on the
>> >unit actually says that it is supposed to be 277V.
>> >So, because we are running it 13% under-voltage, is this thing going
>> >to go south on us in a hurry?
>> Yes.
>> > Our lab walls have 60mil waterproof TPO
>> >roofing material on the outside for a vapor barrier, R30 in the 2x12
>> >walls and ceiling, and 6mil polyvinyl for a vapor barrier on the
>> >inside of the lab insulation behind the sheetrock as an internal vapor
>> >barrier. There is the same 6mil polyvinyl on both sides of the R30
>> >ceiling insulation as well. The room is WELL INSULATED and TIGHT, so
>> >I don't think the unit is actually going to be running very hard to
>> >maintain the temp (74 degrees) and humidity (50%).
>> >Is this going to work long term, or is there something that we can
>> >change around to make it live better?
>> Ask an electrician to spec out a buck-boost transformer for
>> it. If he doesn't know what it is, or how to do it, ask a different
>> electrician.
>> --
>> Click here every day to feed an animal that needs you today
!!!http://www.theanimalrescuesite.com/
>> Paul ( pjm @ pobox . com ) - remove spaces to email me
>> 'Some days, it's just not worth chewing through the restraints.'
>> 'With sufficient thrust, pigs fly just fine.'
>> HVAC/R program for Palm PDA's
>> Free demo now available onlinehttp://pmilligan.net/palm/
--
Click here every day to feed an animal that needs you today !!!
http://www.theanimalrescuesite.com/
Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
'With sufficient thrust, pigs fly just fine.'
HVAC/R program for Palm PDA's
Free demo now available online http://pmilligan.net/palm/
|
|
Posted by Jake on September 10, 2007, 8:11 pm
.p.jm@see_my_sig_for_address.com wrote:
>
> Ask an electrician to spec out a buck-boost transformer for
> it. If he doesn't know what it is, or how to do it, ask a different
> electrician.
>
I concur with Paul's opinions here.
277 is a true single phase feed... in other words, 277 is ONE 480 V
phase to ground.
In all likelihood, your 240 is not. That's not only a equipment
longevity issue.. but probably a safety issue, too.
Get a good electrician in there and have it done right. Depending on the
current requirements of the unit... it shouldn't be too expensive... as
opposed to total equipment failure or a fire hazard.
Jake
|
Page 1 of 13 1 2 3 > last >>
| Similar Threads | Posted | | HELP I need 2 new furnaces!! Single or dual 80% or 90% single or variable speed fan | September 10, 2006, 7:57 pm |
| Phase Chopping or Phase Cut Control | January 19, 2007, 1:54 pm |
| sluggish 3 phase motor | November 6, 2006, 7:55 pm |
| HCFC phase-out change | November 3, 2007, 11:00 am |
| Single Room HRV in north america? | October 20, 2006, 11:56 am |
| Calculating the BTU output of a torch, or single hole orifice. | August 21, 2007, 8:47 pm |
| Heat Pump System - Single Stage or 2 Stages? | May 11, 2008, 12:29 pm |
| Single vs. double pipe loop providing hydronic heat to radiators. | November 7, 2007, 9:17 am |
| Thinking of setting thermostat for single stage heat pump instead of two stage | October 31, 2009, 12:14 pm |
| Single stage thermostat / 2-stage air handler | April 21, 2008, 4:58 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
>our Data Aire Mini Ceiling 2 ton unit with us. We have it hooked up
>to 240V and it is up and running great, but the application tag on the
>unit actually says that it is supposed to be 277V.
>So, because we are running it 13% under-voltage, is this thing going
>to go south on us in a hurry?