Today I rec'd the first of 3 quotes that I plan to get to replace my
25 yr old 4T Carrier heat pump and GE air handler.
The contractor did a Manual load J and determined I need a 4T unit.
(old system is also 4T).
He quoted Carrier Infinity19 HP/Infinity air coil ($10800), Carrier
Comfort HP/Infinity air coil ($10,100), and Comfort HP/Comfort air
His quote assumnes re-use of my old R22 line set. He claims Carrier
tells them that's acceptable practice assuming it's properly
evacuated. I'm curious if it really is acceptable practice?
I plan to get at least 2 more quotes but is this a basis for rejecting
Piping is not necessary to be change as long the piping is in good shape
however installer most make sure that there
is no old oil left in the system, that is very important
the old oil do not mix with new gas, if that what is going to be use
and as much I know Carrier uses R-410 in most of their systems
I am sure you will get more respond to you question
Dido say that
It started out that you absolutely had to replace the line set when
changing from an R-22 system to the new R-410a (or flush the lines).
As time has gone by, it seems the systems will tolerate small amounts
of the old oil and still work just fine.
Now lets just toss in our common sense. You are going to replace your
old system with a new HIGH EFFICIENCY 19 SEER $10,000 system and let
them use the old lines over????????????
WTF is wrong with you?
You should be getting a new system COMPLETE for that kinda money!
This should include a new line set, high end prog stat, new low
voltage wiring, new condensate lines, outdoor disconnect, whip kit,
fuses, pad, pump ups, service agreement, parts and labor program and
maybe even a blow job when they're finished.
WTF is wrong with you? Not one mention of getting all new ductwork as
well. People buy high efficiency systems and expect them to work with
25 yr old leaky, poorly insulated duct systems. Oh they work, just at
6-8 seer, & not the purchased 14-19 seer.
According to Mike Rinke at Rheem, If the lineset is *correctly sized*, and
in good shape........it can be blown out with dry nitrogen to remove any
pockets of old oil in the lines and used with R-410a. My own personal
preference is to always replace the lineset when changing to R-410a wherever
The only other questions I would ask are what other corners is this guy
cutting to be able to do it so cheap??
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.