ReplyRheem products are OK with smaller liquid lines but that's a long ways. At a glance probably be OK.
http://www.thermalzone.com/Heat%20Pu...SEER-Specs.pdf
Professional Member*
Old condo had a 30 yr old Trane 1.5 ton HP
5 /16 and 5/8 lineset , cant measure length but id guess atleast 80 feet long , 2nd story
Im installing a Thermal Zone 1.5 410
This gonna work ?
Global Moderator
Rheem products are OK with smaller liquid lines but that's a long ways. At a glance probably be OK.
http://www.thermalzone.com/Heat%20Pu...SEER-Specs.pdf
Professional Member*
I’d call the factory and get approval. Hate to have a problem down the road
R I P Icemeister
Supporting our Vet’s
http://www.soldierride.org/
http://www.woundedwarriorproject.org/
Professional Member *
Agree.
It will "work" on a 1.5 but don't expect the eff rating your after.
Regular Guest
We used to reuse the Lennox RFC lines on occasion Lennox support said it would work if coil volume was similar
or smaller, and it did, but I'm sure mrkelly is right.
Professional Member*
Well its runnin , dont know how well yet, friggin sky opened up right as i fired it up , told them i will be back tomoro and i left.
Professional Member *
Not to go off topic.We used to reuse the Lennox RFC lines on occasion
You could actually use an RFC liquid line.However,the "trick" back then was to remove the small cap tube or restrictor from inside the condensing unit it worked with and rig it in front of the RFC line and remove the expansion "device" from the new ecoil.The actual "line" itself was never correct to "function" as a metering device as many thought,Still,a bad idea to use them.
Professional Member
Be sure to open up the end of the line after you use your tubing cutter. I have had the same situation. Got a call on an American standard Heritage 14 with a small liquid line like that. It was a 3 ton heat pump. Seemed to work fine. Subcooling and superheat was right on. Coil delta T was right on.
Professional Member*
Exactly my thougts as i cut the line, reamed the end out.... yup
SDC/Educational/Membership Committee*
The 5/16" tubing should work OK if you have enough subcooling at the unit to account for the line pressure drop plus the loss from static lift to the second floor. Here I used the Tecumseh line size app, assumed 100 ft equivalent length and 20 ft lift.
Professional Member *
Basically,you will have to stack the cond in order to get flow so little higher head psig will be "acceptable" in the real world.
Professional Member
i have several apartments that are 1.5 ton r-22 units that have 1/4 liquid lines and are 3 story lift with about 225feet LL they run fine. the apartment owner doesn't want to go 410a so idk how they would run like that. replacement of those linesets is 100% out of the question.
Professional Member*
Did you say 225 feet of lineset ? Holy friggin cow
God Speed, Jim. We'll miss you - 2-26-23
R410A will work better then the R22 units do. R410A requires less volume then R22.Originally Posted by Birmingham
Banned
My 1 chart shows a max LL of 240'(TEL). using 5/16.
Professional Member
ITs stuipid, they ran all the line sets in 4 inch pvc under the slab from one end of the apartment complex to the other, its 5 units long and 3 stories high, so its probably at least 200 feet. the head pressure difference between the units with far line sets and the close ones is about 75psi. in the same conditions.
Banned
75 psi diff between units? There's something else at play here. IF the only diff between unit is the LL length, 75psi is out of line.
SDC/Educational/Membership Committee*
Go to the line sizing app to see what happening:
I'll bet dollars to donuts those units with higher discharge pressure also have a lot more subcooling as well. The liquid line pressure drop and equivalent temperature loss will tell you that.
Banned
Tks ice, i was looking at 5/16 not 1/4. Now my chart shows only 100' for 1/4 w/18,000btu.
Posting Permissions
