Dating a T-87

heatboy_2

.....she was so easy!

Spudwrench

Dating a T-87

Help me settle a debate! Is there any easy way of dating a Honeywell T-87? I found out that the T-87 was introduced in '53. My wife claims our T-87 is '80s vintage, I say it's much earlier, perhaps '60s.

Nathan

Home Depot Employee

Datecode

Whats the datecode/serial on the back?

Spudwrench

I assume you mean the back of the 'stat mechanism itself, not the back of the mounting base? It's kind of cold here tonight, so I don't think I'm going to pull the stat to settle a bet!

Is the date code MM/YY? or some other format?

Nathan

Home Depot Employee

Depends on vintage
For some time now just under cover beneath spring. Perhaps ypu can see without removing from wall
You may see
XX/XX
(week/year)

Unknown

Does this help Nathan?

Like HDE says, it depends on the vintage, this looks like 89/07 to me but Bill will know for sure.

Dave

bob_50

T86

If my memory is correct, in the 50's they were T-86.

Unknown

As I recall,

the T-87 was a 3 wire merc bulb, and the T-86 was only 2, both were around a long time but this one looks like 89/05.
I think the vintage 50`s- 3 wire bulb was a T-26(fixed anticipator), again Bill will know.

Dave

Paul Rohrs_4

I dated her sister in 84'



Regards,

PR

Bill W@Honeywell

The T87 was introduced in...

1948! It was designed by legendary industrial designer Henry Dreyfuss, whose other accomplishments included the 1938 version of the New York Central's 20th Century Limited premier train , with its unique and beautiful two tone grey with silver and cobalt blue accents color scheme and the elegant streamlined Hudson class of steam locomotives.

Dave Yates (GrandPAH)

Bill

I have a cust with a T-87 that sets itself up (they swear it's doing so on its own) from their 65F setting to as high as 78F! I've never encountered a T-87 that had a mind of its own. Maybe it's a ghost?!?

Spudwrench

I never thought this thread would "take off!"

The final four digits on my stat are 8047 (The 47th week of 1980?) so it looks like my wife wins the bet by a hair.

Oh well, it was interesting learning the history of the T-87.
Thanks to all who responded.

Nathan

Paul Fredricks_5

This must be feature on some T-87's. The one in my kids part of the house does the same thing!

Hvacman

That's...

That's the last 4 of the model number... You haven't lost the bet yet. Look for 4 digits all alone below the model number...

Hvacman

I remember her...

She was a little heavy but she'd do anything! ;-p

(apologies in advance for the sexist remark!)

Bill W@Honeywell

That's a strange one...

The old T87's controlled by about 2 degrees off setpoint either way, which was good for a purely electromechanical stat. If this is one of the new mercury free T87's, I don't know of anything in them that would cause wild variations of temperature. I like the FocusPro non-programmables for the old T87 applications, no compatibility issues, +- 1 degree accuracy and only temp up-down, fan on-off-auto and system heat-off-cool buttons to deal with. Lighted displays, too.

DanHolohan

Spudwrench,

if you're married, why are you dating a T-87?

DanHolohan

And this is in the Library

Honeywell History

mtfallsmikey

I can't help myself!

When I dated a T87, she was "high maintenance"...badabing!

Dave Yates (GrandPAH)

and

That's what we're installing for them!

Roland_4

1940's T-87