Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-16-2011, 04:34 PM   #1
Member
 
Join Date: Jan 2009
Posts: 69
Share |
Default

Txv


I have a Ruud UPLB-048Jaz and it has a txv at the indoor coil and a fixed orifice at the outside condenser. If I wanted to install a txv on the outside condenser what txv would I need to order? Would I need a kit or would an AC tech have what is needed for the conversion.

carlb7 is offline   Reply With Quote
Old 09-16-2011, 05:01 PM   #2
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,638
Default

Txv


Huh? What makes you think it has a fixed orifice metering device at the condenser? Is this a heat pump system?

Doc Holliday is offline   Reply With Quote
Old 09-16-2011, 05:34 PM   #3
Member
 
Join Date: Mar 2010
Location: PENNSYLVANIA
Posts: 2,231
Default

Txv


What makes you think it's the TXV??
COLDIRON is online now   Reply With Quote
Old 09-16-2011, 05:42 PM   #4
Member
 
JJboy's Avatar
 
Join Date: Oct 2010
Location: Austin - Texas
Posts: 1,402
Default

Txv


Trying to do reverse engenner
__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
JJboy is offline   Reply With Quote
Old 09-16-2011, 06:19 PM   #5
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,807
Default

Txv


Don't what TXV for it. but remember, no guaranty that a TXV improves your heating efficiency.
beenthere is online now   Reply With Quote
Old 09-16-2011, 08:25 PM   #6
Member
 
Join Date: Jan 2009
Posts: 69
Default

Txv


Don't want to cause too much excitement here! Yes it is a heat pump and yes it has a fixed orifice. Just wanted to know if a 4 ton txv is all that is needed for a conversion. Any other information needed before ordering one?
carlb7 is offline   Reply With Quote
Old 09-16-2011, 08:35 PM   #7
Member
 
JJboy's Avatar
 
Join Date: Oct 2010
Location: Austin - Texas
Posts: 1,402
Default

Txv


No, just the tonnage and refrigerant used
__________________

**Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.
JJboy is offline   Reply With Quote
Old 09-17-2011, 01:01 AM   #8
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,807
Default

Txv


The super heat for the outdoor TXV is often lower then that of the indoor TXV. Installing a standard TXV can cause poor heating performance.
beenthere is online now   Reply With Quote
Old 09-17-2011, 06:41 AM   #9
Member
 
Join Date: Mar 2010
Location: PENNSYLVANIA
Posts: 2,231
Default

Txv


Probably should stick to OEM Parts and equipment. Sounds like you're' heading for trouble. Just saying.
COLDIRON is online now   Reply With Quote
Old 09-17-2011, 09:04 AM   #10
Member
 
Join Date: Aug 2011
Posts: 729
Default

Txv


Don't break what's not fixed..or something like that.
You would have to buy a distributor nozzle, with the proper orifice, and the txv. The nozzle will have to be designed for reverse flow, so its going to have to come from ruud/rheem dealer. And its not cheap. By the time you get finished buying parts and having them installed, you will not have improved anything, and be a little poorer for doing it.
Master of Cold is offline   Reply With Quote
Old 09-17-2011, 10:12 AM   #11
Member
 
Join Date: Jan 2009
Posts: 69
Default

Txv


All summer long the AC worked perfectly. In the heating season the problem shows up when the unit first comes on, air temperature from the upflow will start at a temperature then drop about 7 to 10 degrees in the first 30 seconds. Then it slowly starts climbing back up. I have checked other systems and this does not occur. I was thinking if it is related to refrigerant flow and that a txv may solve the issue.
carlb7 is offline   Reply With Quote
Old 09-17-2011, 10:16 AM   #12
Member
 
Join Date: Aug 2011
Posts: 729
Default

Txv


Before you can fix the problem you have to find out what is causing it. It could be a sequencer kicking out early.
Master of Cold is offline   Reply With Quote
Old 09-17-2011, 10:16 AM   #13
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,807
Default

Txv


Quote:
Originally Posted by carlb7 View Post
All summer long the AC worked perfectly. In the heating season the problem shows up when the unit first comes on, air temperature from the upflow will start at a temperature then drop about 7 to 10 degrees in the first 30 seconds. Then it slowly starts climbing back up. I have checked other systems and this does not occur. I was thinking if it is related to refrigerant flow and that a txv may solve the issue.
Its not because of the piston. And a TXV won't cure it. Good chance its a charge related problem.
beenthere is online now   Reply With Quote
Old 09-17-2011, 11:36 AM   #14
Member
 
Join Date: Aug 2011
Posts: 729
Default

Txv


If the temp dropped 30 seconds after starting then the heat sequencer turned off prematurely. The heat pump wont generate much of a temp rise for at least 30-45 seconds after start-up. Or the thermostat disengaged W1 early.
Master of Cold is offline   Reply With Quote
Old 09-17-2011, 01:18 PM   #15
Member
 
Join Date: Jan 2009
Posts: 69
Default

Txv


So let me make sense of this. When the system first comes on and the air temp from the upflow is 95 degrees right at the start, its this temperature because of the heat sequencer? Wouldn't it take time for this heat to build up as well? Then after the system is running for 30 seconds the temperature slowly drops to 87 degrees until it stabilizes before it gradually rises back to the 95 degree temperature( over about 3 minutes or so), levels out and then increases each degree slowly upward until it reaches its maximum depending on the outside temperature.

carlb7 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.