Oldest one I have ever worked on

[zw17]

She is hanging on by a thread but still functional.

Anyone know what the date code decodes to?

[dlove]

i want to say 1989 or 1990. They look the same as the ones i had...I had a few that was air cooled and water cooled.

[freonguy]

ZW17:
I have a few 1989/1990 vintage units here and they all have the ' 00 ' board which is the version just after what you have - I have worked on units like the one you listed, but I am inclined to say mid - late 80's.

I have been working on Lieberts since the early 80's, but my brain is getting fuzzy - there will be someone out there with a definitive answer.

Good photos!

Freonguy CM

[Tech Rob]

Wow! Not many of them around! I think I have seen one or two in my travels. Oldest one I take care of at the moment is a 1991 model with the Level 10 controls. I upgraded an early 90s Level 00 to AM about 5 years ago and it's still running strong as far as I know.

Cool pictures, thanks for posting them!

[lsu4life]

89. I have worked on and replaced ones from the 70's down here in Louisiana

[freonguy]

[QUOTE=Tech Rob;14036911]Wow! Not many of them around! I think I have seen one or two in my travels. Oldest one I take care of at the moment is a 1991 model with the Level 10 controls. I upgraded an early 90s Level 00 to AM about 5 years ago and it's still running strong as far as I know.

TechRob:

I have 3 on site ( 1990 vintage ) that I have upgraded from 00 to AM in the last couple years - works great!

Freonguy CM

[hvacker]

I wouldn't call it old. Maybe numerically challenged. I remember a job at the air base here where I moved the control panel on one of these to another room and ran the wires back to the unit. It must have been awhile ago because I remember drawing the schematic using Generic Cad.

[Russ57]

That ain't nuthin. My liebert has pnuematic controls. 1978 vintage IIRC. Runs like a top.

Now if you want a real laugh....I have AHU controls.....old barber-coleman....that run on vacuum tubes....that are still on-line.

[zw17]

That ain't nuthin. My liebert has pnuematic controls. 1978 vintage IIRC. Runs like a top.

Now if you want a real laugh....I have AHU controls.....old barber-coleman....that run on vacuum tubes....that are still on-line.

Pics or it never happened.

[Russ57]

Hmm, so now I'm a liar? Let me get through this hurricane and I'll see if I can figure out how to post a pic.

Pray tell, what is better about a 10mm?

[basshound71]

We currently have 3 1983 models with both dx and the econo coil (chilled water coil). They are all in pretty fair shape still.

[zw17]

Hmm, so now I'm a liar? Let me get through this hurricane and I'll see if I can figure out how to post a pic.

Pray tell, what is better about a 10mm?

No, I am not calling you a liar. I just want to see this beast.

[OldSchoolMech]

What are they big AC for computer rooms? I have never seen one. Probaly due to my age