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TGO

Joined on March 20, 2004

Last Post on July 21, 2009

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Thermometer

@ August 9, 2005 8:50 PM in where can I get an accurate thrermometer to measure super heat a

I have a Check-it Superheat Pyrometer - available at Graingers. It has 3 temp probes and will calculate the temp differance between any two. It has magents on the back which hold fairly well ( don't leave the weight of 3 leads on it or it will slip). Don't bother with the velco straps just get a few big spring clips and put some insulation on the inside. It also comes in a nice plastic case. It only reads to the full degree - no tenths but for superheat, subcooling, and duct temps its fine. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Thermometer

@ August 9, 2005 8:29 PM in where can I get an accurate thrermometer to measure super heat a

> Ask Tom from TGO about the success he's been
> having with the thermometer I hooked him up
> with.
>
> Tom, can you supply the info (make,
> model, etc.) for Ken as well as any comments
> about your expeience with it.
>
> Much
> appreciated.

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Thanks Eugene

@ August 9, 2005 6:44 PM in New System performance

I will have to check the probes on my thermometer, I am sure I took the readings carefully. The air handler has the TXV bulb inside the cabinet, and I was surprised to see it was not insulated. I called the rep about it and they told me thats the way it should be. Hard to argue with results like the ones I posted. The unit is rated at 15 seer. Can't wait until I learn enough about Pressure enthalpy to chart it. It was a very smart man and a great teacher who is still "learning me the AC trade" BTW - Have you chaecked your e-mail recently? Thanks Tom To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Thanks Eugene'

@ August 9, 2005 6:37 PM in New System performance

> From your calculations, you have a 20-degree
> delta-t across the evaporator coil, a 23-degree
> delta-t OF the evaporator coil, 11 degrees of
> subcooling and a superheat of 6 degrees.
>
> Just
> as a calculation error, the liquid line
> temperature cannot be lower than the outside
> ambient but, since they only differ by 1-degree,
> I can safely say that descrepancy is due to
> measurement error.
>
> Awesome job! Who taught
> you air conditioning?! (Kidding)

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Condensation

@ August 9, 2005 6:28 PM in Possible to use Attic Heat for Swimming Pool ?

I think the idea of coils connected to pool pump would make me more than a little nervous. They would be heavy, wet (condensation) and if they leaked, capaable of emptying the swimming pool into the attic. A solar collector outside the roof would not only heat the pool but cool the attic as well. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

@ August 9, 2005 5:49 PM in New System performance

I took the following readings on a new install, 2 ton 410A system. How is it performing? Any problems you see based on these readings? Indoor wet bulb 62 Indoor Dry bulb 72 Supply air (right off the air handler) 47 Return air (right at the air handler) 67 Suction line pressure 128PSIG Liquid line pressure 257PSIG Suction Line temp (at the condensor) 50 Liquid Line Temp (at the condensor) 75 Outdoor air temp 76 System has a TXV valve and the MFG calls for 11 degrees of subcooling + - 2 degrees. Thanks! To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Locktite 55

@ August 3, 2005 9:43 PM in has anyone used LOCTITE 55 pipe sealing cord?

Works great when properly applied - you should check the working temp, I don't think is is rec for temps above 180. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

The Wall

@ August 1, 2005 3:11 PM in Lets hear it for the WALL

When I think of all that Dan & The Wall have done for me there is only one way I can show proper reverence. Throw a brick at them. ;-) To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

PDA

@ July 30, 2005 5:34 PM in PDA Question

I use a tosiba pocket PC with active sych to Outlook. Has all my contact info as well as calander. Easy to set up and easy to use - connects to the office computer with a USB cable. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

PDA

@ July 30, 2005 5:31 PM in PDA Question

> With all the running around everyone does, is
> there anyone who uses PDA's? I'm considering the
> technology (I'm usually a day-planner person) and
> I'm looking for suggestions. I would like
> something that I can use to sync with my
> Microsoft calendar. Any feedback?

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Hi Professor

@ July 30, 2005 1:53 PM in What the heck is going on here?

Could moisture in the system (a non condensable) be freezing some where in the system and causing a blockage? To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Best of luck

@ July 26, 2005 7:48 PM in This isn't exactly \"goodbye\"...

To you Bill, I hope the move is everthing you want it to be and more. Don't be a stranger. Tom To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Buderus

@ July 20, 2005 6:53 PM in steam boilers for bread bakeries

Not all the products Buderus makes are available in the USA. The ones not available here aren't shown on the website. A few years back I had information on a heat exchanger to produce steam from their standard boilers, but to my knowledge they were never imported to the US. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Sorry for your loss,

@ July 20, 2005 6:44 PM in Lost our hamster today

Any pet becomes a member of the family and their loss is always hard. My Condolences Tom To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Sorry for your loss,

@ July 20, 2005 6:41 PM in Lost our hamster today

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If a fixed bore

@ July 18, 2005 6:58 PM in Test #1

Metering device is over feeding the coil would have too much liquid ref in it and the the superheat would be low not high. But then again I though I had it the first time :-( Hope we resolve this tonight I won't be able to sleep. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

With the air flow

@ July 18, 2005 5:58 PM in Test #1

across the evaporator and the condenser coils being correct, a superheat of 52 and a subcooling of zero I would say the system is undercharged. Locate & repair leak. Replace filter driers. Pressure test with dry nitrogen Evacuate system below 500 microns. Weigh in charge accoring to rating plate. Check superheat and delta t across the coil. How'd I do? To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

R-407c

@ July 18, 2005 2:05 PM in R-410a

Hi Professor, Are any MFGs currently using R407c in new equiptment? I have only seen R-22 and R410 being offered, but I haven't checked every product line. BTW- What part of "vacations over - now back to work" didn't you understand? ;-) To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

R-407c

@ July 18, 2005 2:00 PM in R-410a

> R-410a is not the only player in the game. R-407c
> is another viable alternative to R-22. R-407c is
> a ternary blend of R-32, R-134a and R-125.
> R-407c operates with similar temperatures and
> pressures as R-22, but experiences a temperature
> glide, as it is a refrigerant blend.
>
> R-407c
> is a good choice for use on existing R-22
> systems, although some system alterations need to
> be made.

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We are

@ July 18, 2005 1:10 PM in R-410a

certified for 410A, and have the gauges. We have installed and serviced 410A systems, and present information about them when customers are looking for new installations or complete replacemants. With Honeywell, Carrier, Trane pushing it and most other MFGs offering it I believe it will be the #1 system after 2010. I also think someone will develop a drop in replacement for R-22 long before the production stops completely. To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"