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Search: Posts Made By: Thepprof
Forum: Geothermal & Heat Pumps 10-29-15, 07:32 AM
Replies: 282
Views: 199,225
Posted By Thepprof
Tried R290 in a ac only unit and in a minisplit...

Tried R290 in a ac only unit and in a minisplit both worked great. Since the minisplit was a rental I purged the unit after verifying it worked and switched back to R410a prior to installing.
Forum: Tools 12-09-14, 06:24 PM
Replies: 32
Views: 25,018
Posted By Thepprof
HOw about using a Flir to tune your hvac unit????...

HOw about using a Flir to tune your hvac unit???? any thoughts...
Forum: Geothermal & Heat Pumps 07-01-14, 05:52 AM
Replies: 282
Views: 199,225
Posted By Thepprof
I have a Klimaire 12K Minisplit. The limit...

I have a Klimaire 12K Minisplit. The limit switch on the compressor failed and the compressor locked up. Since I purchased the unit online I knew that warranty was a joke. I took a compressor out...
Forum: Geothermal & Heat Pumps 04-02-14, 08:46 PM
Replies: 4
Views: 11,729
Posted By Thepprof
I really had nothing to lose so took a Klimaire...

I really had nothing to lose so took a Klimaire 12K unit that had a compressor that locked up. I took a compressor from a 10k window unit and installed it in the Minisplit. I only found 1 article...
Forum: Geothermal & Heat Pumps 04-02-14, 12:41 PM
Replies: 32
Views: 24,733
Posted By Thepprof
Recently added r290 to a r12 frig first run -17 f...

Recently added r290 to a r12 frig first run -17 f in the frig part. I now have a Minisplit that locked up the compressor. Pulled the toshiba and put in a old wrpl from a window ac installed it...
Forum: Geothermal & Heat Pumps 01-21-14, 06:17 PM
Replies: 37
Views: 42,746
Posted By Thepprof
Larger evaporator

Hi; The laws of physics and thermodynamics have a basic rule regarding heat transfer or movement. From hot to cold and directly related to the difference of temperatures from one medium to another...
Forum: Geothermal & Heat Pumps 07-19-13, 08:30 AM
Replies: 7
Views: 4,957
Posted By Thepprof
How do I evaluate a minisplits performance

Hi; I have a number of regular HVAC units that I maintain in my rentals. for a quick scan I use a ir thermometer and looks for 14 - 18 degree difference in air temperature outside and 12 - 20...
Forum: Geothermal & Heat Pumps 06-21-13, 05:06 PM
Replies: 1,943
Views: 3,641,812
Posted By Thepprof
R290 vrs R410a

Actually I'm just trying to understand more regarding HVAC.

referring to the previous post. I decided that once I got the unit working on R290 it was ok to service with the very expensive...
Forum: Geothermal & Heat Pumps 06-21-13, 06:20 AM
Replies: 1,943
Views: 3,641,812
Posted By Thepprof
HI; I got tired of being screwed by local A/C...

HI; I got tired of being screwed by local A/C contractors and decided to get my card and start to service my own rental units. I used propane to test a Klimaire 12K BTU unit set up in my garage. I...
Forum: Geothermal & Heat Pumps 05-16-13, 01:56 PM
Replies: 282
Views: 199,225
Posted By Thepprof
from a rank amature's point of view "yes"

I did not do a exhaustive study. did not monitor current usage. Since the minisplit does not lend the equipment to the usual line set measurements to get the proper gas in the system and I do not...
Forum: Geothermal & Heat Pumps 05-16-13, 06:46 AM
Replies: 282
Views: 199,225
Posted By Thepprof
r290 in a minisplit

I used R290 in a Kilmaire minisplit last year to test a unit that I thought was shot. I ended up with a 25-30 degree change at the air handler on a 95 degree day with the unit set up in my shop. ...
Forum: Geothermal & Heat Pumps 04-14-13, 04:03 AM
Replies: 282
Views: 199,225
Posted By Thepprof
I did not realize my previous post was still on...

I did not realize my previous post was still on line..
Forum: Geothermal & Heat Pumps 04-05-13, 05:24 AM
Replies: 282
Views: 199,225
Posted By Thepprof
HI; I took a Klimeaire 12K btu unit (a long story...

HI; I took a Klimeaire 12K btu unit (a long story of how I got here) and charged it with R290 from my local hardware store. I used my IR scanning thermometer to scan the condensor coil to indicate...
Forum: Geothermal & Heat Pumps 03-11-13, 08:57 PM
Replies: 9
Views: 4,482
Posted By Thepprof
I am looking at the hvac schematic for a Goodman...

I am looking at the hvac schematic for a Goodman Package unit.

When in cooling, the compressor via the reversing valve sends the hot gas to the outdoor coil where with the application of pressure...
Forum: Geothermal & Heat Pumps 03-11-13, 06:21 AM
Replies: 9
Views: 4,482
Posted By Thepprof
What the heck???

Note; REVERSING VALVE. Thanks for the response but when I look at the diagrams of my newest HVAC unit (Goodman packaged unit) In the heating cycle the reversing valve sends the compressed gas...
Forum: Geothermal & Heat Pumps 03-11-13, 05:37 AM
Replies: 282
Views: 199,225
Posted By Thepprof
limited experience with solar collectors

Years ago I was putting a roof on a building and had several pieces of corrogated galvanized roofing left over. approximately 3 ft x 6 ft. I framed the metal with wood with a 1 in thick foam...
Forum: Geothermal & Heat Pumps 03-10-13, 05:14 PM
Replies: 9
Views: 4,482
Posted By Thepprof
You would think with all of the "Engineering"...

You would think with all of the "Engineering" involved and with basically equal cooling and heating seasons here in Va. My brain is still smoking from reading a few pages explaining why the line...
Forum: Geothermal & Heat Pumps 03-10-13, 09:52 AM
Replies: 9
Views: 4,482
Posted By Thepprof
What the heck?? (HP line set sizing)

I'm still a novice at HVAC and questions keep piling up. Ok I just spent a number of hours reading about sizing of the line sets on a heat pump.. why? My 5 systems heat as much as they cool so this...
Forum: Introductions 03-04-13, 07:14 PM
Replies: 2
Views: 3,094
Posted By Thepprof
sop for Hvac heating

I have a number of rental units and carry a nice Ir temp probe with me at all times. If I am in the house to change the filters which I do, I always check the temps and note them. This is a 10...
Forum: Introductions 03-04-13, 08:04 AM
Replies: 2
Views: 3,094
Posted By Thepprof
hvac & heating

I'm totally new to HVAC. I've installed 2 minisplits (permitted, inspected and passed by the local inspectors) and maintained 7 personally owned units for about 7 years now. I took the local A/C...
Forum: Geothermal & Heat Pumps 01-27-13, 05:28 PM
Replies: 1,943
Views: 3,641,812
Posted By Thepprof
The last 3 HVAC fellows I have trusted cost me...

The last 3 HVAC fellows I have trusted cost me big. This is what prompted me to learn about HVAC. The first one sold me a air handler for $3000 when all that was wrong was a hole in the compressor...
Forum: Geothermal & Heat Pumps 01-26-13, 10:25 AM
Replies: 1,943
Views: 3,641,812
Posted By Thepprof
Hacking the minisplit

Hi; I presume if you have enough knowledge to hack a unit you have a very good handle on basic functions of a minisplit. I am a landlord in richmond, Va. and after being screwed (pardon my French)...
Forum: Geothermal & Heat Pumps 09-11-12, 07:56 AM
Replies: 1,943
Views: 3,641,812
Posted By Thepprof
Minisplit

Minisplits only have a gas tap hence normal analysis of the system cannot be done. If I suspect low gas, the process involves removing all gas and reloading by weight. I recently had occasion to...
Forum: Geothermal & Heat Pumps 07-27-12, 05:37 AM
Replies: 282
Views: 199,225
Posted By Thepprof
I recently posted several notes; regarding how to...

I recently posted several notes; regarding how to add Propane to my Klimeair minisplit. I literally got no feedback other than the probability that R290 is compatable with the oils in a R410a...
Forum: Geothermal & Heat Pumps 07-23-12, 06:46 PM
Replies: 282
Views: 199,225
Posted By Thepprof
I recently converted a Klimeair 12K unit from...

I recently converted a Klimeair 12K unit from R410a to Propane. since there is no data available other than the standard gas charts. I just started adding propane to a empty,vacuumed system and...
Showing results 1 to 25 of 28

 
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