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Old 05-23-2013, 07:08 AM   #16
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Please help me correctly size my A/C condenser


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You will get some weird pressures and operating characteristics as it is a 8 SEER and hooking it to a 13 SEER Goodman is basically cobbling it together but hey it is a free world.
I've been told this coil doesn't have capillary tubes, but a 3/8 x 3/4
orifice.
Will this orifice allow it to work with the 13 Seer, R22 condensers?

Thanks Again,
Uni

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Old 05-23-2013, 08:27 AM   #17
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Please help me correctly size my A/C condenser


It will work but not properly. You would need to understand thermodynamics and refrigeration fundamentals and how units are designed and matched etc to know why and we cannot teach you that. Kinda like taking your new computer and putting Windows XP into it instead of Windows 7 or 8. May work but it won't work very well. Still uses DOS basics but won't work very well. It sounds to me like your techs are lazy and don't want to be bothered changing the airhandler and looking to make a quick few $$. This happened a LOT in the 90's and later and we had and still have some horribly mis-matched units that won't dehumidify the air properly and are VERY energy in-efficient. By the way they were describing how to size the unit etc they don't instill confidence in me. I am a Journeyman Refrigeration Tech and can tell by the way people talk whether they know what they are doing.
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Old 05-23-2013, 11:10 AM   #18
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Please help me correctly size my A/C condenser


Thanks Yuri.

I understand you to mean a new unit won't work properly due to it being mismatched.

Seems my only alternative, if I want air now, is to trust a HVAC Tech to put in a used unit, getting the best match possible.
A HVAC Tech has told me about a 3ton Carrier model # 38CKC036-350.
I think it's a 10 Seer.

Should this 10 Seer work better?
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Old 05-23-2013, 11:58 AM   #19
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Please help me correctly size my A/C condenser


No. We have plenty of those mismatched units that don't work properly also. Why buy a used unit. Like buying a used car motor. I can guarantee you, you are buying someone else's problems. As suggested earlier buy your own units online but be prepared to pay lots to get them installed. Contractors make 80% or more of their yearly profit on installs not repairs so you are not going to take money out of their mouths. If you are short on $$ there are financing plans thru some of the larger dealers. Makes no difference to me what you do as there is no profit in it for me but lots of other people will read these posts and I try give good advice for them too.
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Old 05-23-2013, 12:06 PM   #20
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Please help me correctly size my A/C condenser


Thanks Again Yuri,

Budget dictates.

I don't believe in going using credit & going in to debt, if at all possible.

If I want air in the foreseeable future, this is about the best I can do.
So I'm trying to get the best setup & match I can.
I appreciate your help & candor.

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Old 05-23-2013, 12:23 PM   #21
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After 34 yrs in this biz I have seen many many many hackers and hacked up systems and it is a real shame to waste your hard earned $$ on something that won't work well. Trust me the hackers selling used units etc don't care and you get no warranty. I am sure some of them are suffering in this economy and will do or sell anything to make a buck but that does not change the facts or mechanics of why going used etc is a BAD idea. Cars are different, you can use rebuilt or used parts but there are sanitation issues/acid or debris in those used units etc which will be a problem also.
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Old 05-23-2013, 12:25 PM   #22
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What type of sanitation concerns?

Please explain?

Thanks Again,
Uni
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Old 05-23-2013, 12:31 PM   #23
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Please help me correctly size my A/C condenser


AC systems are a sealed loop and whenever you open it moisture gets in which mixes with the oil and can turn into acid and ruin the compressor. Why does anyone have a used unit? Don't believe the story of it being the wrong size and they had to remove it. When they remove it and at 10 SEER it is 10 or more yrs old then they keep it and air and moisture sits in it and more than likely like a 10 yr old car it is 1/2 worn out. They will tell you they are putting filter driers on but that won't make it new or acceptable IMO.
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Old 05-23-2013, 12:36 PM   #24
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Thanks Yuri,

Uni
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Old 05-23-2013, 12:43 PM   #25
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Glad to Help and I know all the stories they use.

A shame to spend your hard earned $$ on something that won't work properly IMO.
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Old 06-27-2013, 04:18 PM   #26
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Please help me correctly size my A/C condenser


Hello Again,

I picked up a spare A/C condenser today.
It’s a Lennox HS23-411-1P (1993 vintage).

I’ve been looking for an older Lennox
3 ton (41K BTU) based on the older nomenclature to couple with my old Lennox air handler.
I’ve been convinced, become a believer, older Lennox products were built very well, & to last almost forever.

My air handler (specification plate is mounted in such a way it’s hard to see), &
evaporator coil C3-41-1FF, are 1974 models, & I was told the units will be considered commercial grade by today’s residential standards, as they are built with stainless steel, & heavy gauge copper.

I know the newer units cost less to operate, how much less, I’m not sure.
I’m holding my breath till I see my electric bill.
But considering the prices of new units, & installation, I think I’ll make out better & cheaper, with these older units.
I have a split system & my air handler is in the attic.
I have had quotes $4K-$8K to replace the entire A/C system.

My used 3ton Carrier model (vintage 2002), 38CKC036350, has been installed & seems to be working fine.
It seems a bit noisy to me, rated at 82db.
The Lennox is rated at 78db.

The Lennox condenser is about 30% physically larger than the Carrier.
The housing is larger, 6 inches taller & 6 inches wider, &
the fan blades are so much larger too!

Can anyone tell me why?
Both are 3 ton units.
The Carrier, a true 3ton, &
the Lennox a 3ton 41K BTU, based on the 41K BTU old Lennox nomenclature
(my evaporator coil is rated at 41K BTU, based on the old Lennox nomenclature too).

Please tell me what you think?

Thanks In Advance,
Uni

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Old 06-27-2013, 07:11 PM   #27
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Please help me correctly size my A/C condenser


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Glad to Help and I know all the stories they use.

A shame to spend your hard earned $$ on something that won't work properly IMO.
To me,he doesn't want to spend a penny.
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Old 06-27-2013, 07:16 PM   #28
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To me,he doesn't want to spend a penny.
A penny saved, is two pennies earned.

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Old 06-27-2013, 09:42 PM   #29
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Please help me correctly size my A/C condenser


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A penny saved, is two pennies earned.

If its used that means it has been thrown out. Why was it thrown out? Not to mention the current cost of R-22 for a whole system
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Old 06-27-2013, 10:07 PM   #30
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Please help me correctly size my A/C condenser


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If its used that means it has been thrown out. Why was it thrown out? Not to mention the current cost of R-22 for a whole system

Hopefully this is also a bargain like my Carrier unit,
if not,
oh well,
I've taken a prudent chance.

The unit supposedly had the R-22 captured.

I do notice, this unit requires an expansion valve.

I have a horizontal evaporator coil in the air handler, & I believe I was told it has an orifice(?).

Is the expansion valve required for this condenser, part of the condensing unit or the evaporator coil, or line set?

I've attached the information page.

Thanks Again,
Uni
Attached Files
File Type: pdf EXPANSION VALVE Required.HS23.pdf (27.6 KB, 25 views)


Last edited by Unicornz0; 06-27-2013 at 10:32 PM.
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