Type: Posts; User: wormy
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Word to the wise
don't give that 35 degree number to homeowners
its best to go with something abstract like
"When it gets fridgid outside, the furnace may come on from time to time. The heating...
just a thought....
double check your gauges and meters... make sure everything is reading properly and calibrated
nothing sucks worse than having the wrong numbers
we're only as good as our tools ...
wait till you see an old unit with that uses the capacitor as part of the crankcase heater circuit
Trane used this years ago.... just ran across and old Rheam (or was it was it a RUUD) that did...
isn't a 3000 stat a HP stat?
if so... you better not use that or your air conditioner is gonna kick on when you call
for first stage heat. You just need a normal stat not a heat pump stat.
opened a carrier package unit once
very very old model..... heat section on right / compressor section on left
wished I could tell you model number
huge wasp nest
its a shame they installed a new system that uses r22
i've seen this once on a lab chest type freezer
pretty sure it was a 404a system
w/ rotary compressor as well
Ran into a Carrier system before that had something like 4 pounds of refrigerant listed on the nameplate
split system.... similiar to a mini-split.... had a compact evap/fan section hanging from the...
Picturing the scene from Poltergeist where the community was built over a cemetery and coffins came poppin up out of the ground.
when they're driving off.... you gotta yell along with them......
Had to do some refreshing on the subject myself
The dwyer gauge I used with my pitot tube had a FPM scale on it to do the conversion automatically
I would traverse the duct and average all my FPM...
Just so I wouldn't drive myself nuts with this....
I looked up the manual for the panasonic in the guard shack I talked about
its the one with the HUGE temp swing I mentioned....
here's how the...
Not that anyone is actually interested in this story...
but I'm venting none the less
and this looks like a good spot to put it hehe
Talk about mini splits, and end up at one of...
As mentioned before....
the translation from Korean to English is horrid
I've pulled my hair out many times trying to figure out what they are trying to say
Customers have a hard time with the...
white and brown w/ white stripe are one and the same
ohm them out and you'll see they ohm out zero ohms
putting a wire nut on the brown w/ white stripe and not connecting it to an
I don't set up a lock out temp.
We install mostly TCONT402 stats
really nice with dual fuel
without the lockout enabled.... it calculates how long the the system has ran and decides what it needs...
Voltage applied to contactor coil usually equates to contactor pulling in right?
Think a little further in depth and we really need electrical current moving into the coil to produce a magnetic...
Was just doing random searches to help out and run across this
hope it helps
I see lots of offices suffer from stratification
Supply and Return in ceiling
Since return is not near floor, it can't draw in cooler air laying on the floor
the supply grilles are all 'identical'...
Google search "Terminal Velocity Hart and Cooley"
Read the first PDF "Throw, Blow, Flow, Oh No!"
See if that gets you headed in the right direction
Where does the high voltage reading come from?
Wormy's simplified version
When you pass a magnet (or more precisely the lines of the magnetic field) near a conductor, an electrical current is...
along the same lines as the compressor protection mentioned before......
this video mentions larger sized compressors
I believe the technology has finally migrated to their smaller compressors...
Had a customer with no heat
When I walked in the house, I smelled burnt paper and saw the ceiling kinda blackened.
Asked about it, and the lady said...
We were cold... my husband decided to...
I'll take a stab at another way to look at it.
Grant it... it may not be the right answer
I'm just trying to wrap my head around it as well.
High outdoor temp = high compressor amperage
I bought a Bryant Evolution gas pack from our distributor for a killer discount.
Another dealer had ordered the equipment and it sat in their lot...
possible high pressure safety switch opening trying to protect the equipment from high refrigerant pressures.
110 outdoor temp AND 87 degree indoor temp will cause the refrigerant pressures to...
Reminds me of the time.....
get late call
My A/C is out and I have a bunch of kids
I arrive to an extremely hot mobile home with a
I pull in and tell the guy we...
I had a Veto LC before..... I'm probably the only one on here that didn't really like it.
I'm not a very big person and with my tools in it.. it was just way too heavy to lug around.
The bag by...
Did the old unit heat and cool OK?
If it did, then why go bigger?
If it didn't... why? Was it correctly sized and installed with duct leaks?
Its a 30GTN100-C631KA
I think these are the newer style EXV's
This factory had a sister factory on the opposite end of town
that had the older style EXV's
They had an aluminum looking motor...
Never thought of a check valve internal of the compressor
That would explain it for sure
And yup... this chiller has the Electronic Expansion Valves on it
On a side note concerning them....
Yup... I agree
Need to replace the oil and test till its all cleaned up
I hate that we're doing rinky dink 'one time only'
oil change and filters on compressors that are
shorted to ground.
Carlyle O6E Compressors
Changed the oil on two today....
and I'm pretty sure I made every mistake
I could possibly make.
So.... in an effort to not repeat today's
crappy set of events.......
I'd like to give one of these a test run
I'm of the opinion that efficiencies do change with any change in indoor or outdoor conditions.
SEER is a measure of equipment efficiency (cooling mode).
HSPF is the same thing but for heat pumps...
Don't be too hard on the tech's lack of a good response.
There's a huge amount of knowledge that goes into this field.
I've been doing it for twenty years and I'm still learning stuff
More than likely, you have a case of formicary corrosion
otherwise known as Ants Nest Corrosion.
I have seen a study by a major A/C Manufacturer
that still hasn't come to a conclusion as to...
Gonna start a new thread in the tech forum to discuss the two duct issue.
Look for the thread entitled "Duct out both sides?"
was going to post a link to an install guide
more fuel for the fire
(Its late and I'm sleepy... so take this with a grain of salt)
old school rule of thumb
(always refer to manufacturers installation requirements)
anything larger than a...
We had just hired a new guy....
his prior experience was in the Marines
Asked him what he did
"Done the wiring for communications"
"Just came back from Iraq, we trailed behind infantry...
Congrats on becoming a student of the trade.
Hope you have a long successful career.
You've come to an excellent site to further your learning and understanding.
Keep in mind, we're not gonna...
Copeland's Advanced Scroll Temp Protection
For those wanting to know more about
one of Copeland's ways to protect their compressors
(commercial compressors though.... don't think its on
If I'm reading your comment right,
You have a Trane XR80 which is a furnace
and its inside the house
If the mice are getting into the blower compartment;
then chances are, there are air leaks...
well... I'm sorry I'm not gonna be a huge help...
just letting you know there's "SOMETHING OUT THERE" that might help.
We've installed a 100% outside air unit in a Chemical Lab.
Boss came up...
Which piece of equipment are the mice getting in to?
The outside section or the inside section?
11 years old.
Did the prob start this year?
DId it do this 10 years ago?
How often is the weather adverse? (Ice Storm weather)
Trouble defrosting? As in frost forming all the way out to the...
How long have you had this unit?
Have you run into this unit not able to defrost itself on
a regular basis? Not sure where you're from or what kind of
weather patterns you have though.
Turning the AC on to defrost is not something I'd recommend.
On a side note, you can run your AC in the winter if
controls are added to do whats necessary to keep the
system operating in the...
zero defrosts hehe
For a surface to sweat
the temperature of that surface has to be colder than the dew point of the ambient air.
Dew point is the temperature that the air has to be for the moisture in that air to...
just in case....
this is the btuh calc for cool mode
BTUH = (Return Enthalpy - Supply Enthalpy) x 4.5 x CFM