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Search: Posts Made By: RB855
Forum: Conservation 08-14-17, 12:31 PM
Replies: 16
Views: 2,129
Posted By RB855
The liquid line temperature reading is very...

The liquid line temperature reading is very concerning. Follow the liquid line back up into the condenser and find out where the restrictions starts. Various brands are using liquid line driers...
Forum: Conservation 08-09-17, 12:45 PM
Replies: 16
Views: 2,129
Posted By RB855
I was simply using 134 as a example on...

I was simply using 134 as a example on retrofitting 410 compressors. Pressures aside, mass flow rates of 134 and 22 should be somewhere in the same neighborhood, unlike 410a. There's no possible...
Forum: Conservation 08-08-17, 09:27 PM
Replies: 16
Views: 2,129
Posted By RB855
I intentionally had a project that used a R410...

I intentionally had a project that used a R410 compressor running R134 due to special circumstances. If I am recalling correctly, a 12kbtu compressor downrated to about 8500btu using the other gas. ...
Forum: Conservation 02-26-17, 11:56 PM
Replies: 25
Views: 3,731
Posted By RB855
Curious where you go with this project. I was...

Curious where you go with this project. I was down this same road about 7-8 months ago. I havnt abandoned the project, I just figured out a better way to do it and havnt had the time to start over...
Forum: Geothermal & Heat Pumps 07-02-16, 01:42 PM
Replies: 41
Views: 14,019
Posted By RB855
Shame on me for not taking pictures, but I was...

Shame on me for not taking pictures, but I was involved in replacing a compressor and cleaning coils on a drycleaning machine recently, and what I found is quite interesting. Theory first,...
Forum: Geothermal & Heat Pumps 07-02-16, 01:14 PM
Replies: 4
Views: 2,227
Posted By RB855
Please excuse the quality of this work... Im not...

Please excuse the quality of this work... Im not a tin knocker, and my brake isnt big enough for even small work like this.

The evap outlet needed to be redirected to the same side as the...
Forum: Geothermal & Heat Pumps 06-19-16, 09:11 PM
Replies: 4
Views: 2,227
Posted By RB855
Welp, it was a lot dryer this afternoon, so round...

Welp, it was a lot dryer this afternoon, so round 2! Worked on the charge a bit, got the SH into target range but ended up with over 20* of SC, so the captube is too long. I have a txv perfect for...
Forum: Geothermal & Heat Pumps 06-19-16, 10:50 AM
Replies: 4
Views: 2,227
Posted By RB855
I dont imagin the cop will suffer too much since...

I dont imagin the cop will suffer too much since the condenser will be getting conditioned inside air across it instead of 90 something outside air. I know its not going to be great since im already...
Forum: Geothermal & Heat Pumps 06-18-16, 04:39 PM
Replies: 4
Views: 2,227
Posted By RB855
DIY Active HRV (Image Intensive)

Started up another spur of the moment project, and got quite a bit of progress done before the rain showed up (The then better half talked me into a house without a garage...). To make a long story...
Forum: Geothermal & Heat Pumps 06-15-16, 08:12 PM
Replies: 61
Views: 9,286
Posted By RB855
As an afterthought.... you said you linked both...

As an afterthought.... you said you linked both coils. Their arrangement is pretty important. In evaporators , you feed from the bottom and pull from the top, and suction should be closest to the...
Forum: Geothermal & Heat Pumps 06-14-16, 08:36 PM
Replies: 61
Views: 9,286
Posted By RB855
Must say that these results look really good! ...

Must say that these results look really good! The first run is almost perfect with the exception of the motor using so much power. The second run, the airflow looks like it might be a little low,...
Forum: Geothermal & Heat Pumps 06-14-16, 07:10 AM
Replies: 61
Views: 9,286
Posted By RB855
I need to respectfully disagree with the first...

I need to respectfully disagree with the first step. Slowing the fan will cause more of the gas to stay in the evap further starving the condenser. The condenser is already so close to starved that...
Forum: Geothermal & Heat Pumps 06-13-16, 09:34 PM
Replies: 61
Views: 9,286
Posted By RB855
That paints a much clearer picture of what's...

That paints a much clearer picture of what's going on. It's without doubt undercharged, the calculated SC at the 30min mark is 17*F where you have 4-5*. I would bring up the SC and re-evaluate the...
Forum: Geothermal & Heat Pumps 06-13-16, 12:12 AM
Replies: 61
Views: 9,286
Posted By RB855
Dont forget that the cycle is dependent on ALL...

Dont forget that the cycle is dependent on ALL variables. While your evap will probably remain fairly stable, you will still have seasonal differences with temperature and humidity. You are also...
Forum: Geothermal & Heat Pumps 06-08-16, 10:12 PM
Replies: 61
Views: 9,286
Posted By RB855
Need a temperature and pressure reading before...

Need a temperature and pressure reading before the captube in the liquid line, a temperature and pressure reading between the evap and compressor (closer to compressor better as it gives true...
Forum: Geothermal & Heat Pumps 06-08-16, 02:02 PM
Replies: 61
Views: 9,286
Posted By RB855
You do have a valid point about having the high...

You do have a valid point about having the high superheat, but that only applies when it's in a refrigeration situation. Having 30-plus degrees of superheat when your evaporator temperature is 60 can...
Forum: Geothermal & Heat Pumps 06-08-16, 10:36 AM
Replies: 61
Views: 9,286
Posted By RB855
I'm guessing water temp and Ambient wetbulb, but...

I'm guessing water temp and Ambient wetbulb, but add some gas till you get closer to 10* sub cool across the condenser. Get me some low side temp readings and a wetbulb and we can judge the captube....
Forum: Geothermal & Heat Pumps 06-07-16, 10:39 PM
Replies: 61
Views: 9,286
Posted By RB855
Fun little mini hpwh project. I'm curious, are...

Fun little mini hpwh project. I'm curious, are you charging gas and adjusting the captube with superheat/subcooling in mind, or just kinda winging it to see what works? Given you have a excellent...
Forum: Geothermal & Heat Pumps 01-20-15, 10:59 PM
Replies: 34
Views: 8,389
Posted By RB855
(There are 2 pictures here. If none/one loads,...

(There are 2 pictures here. If none/one loads, refresh. My servers slow lol)
This isnt from this specific model (it had a smaller version of this), but relevant for heatpumps/coil discussion. ...
Forum: Geothermal & Heat Pumps 01-20-15, 10:30 PM
Replies: 34
Views: 8,389
Posted By RB855
(There are 2 pictures here. If none/one loads,...

(There are 2 pictures here. If none/one loads, refresh. My servers slow lol)
AC, the design changes I think affected me mostly because of my use of TXV which was sensing a colder vapor line on the...
Forum: Geothermal & Heat Pumps 01-19-15, 11:58 PM
Replies: 34
Views: 8,389
Posted By RB855
Not to take bloody forever to finish a project,...

Not to take bloody forever to finish a project, but things have once again occurred in development. Discovered that the evaporator between a heatpump and straight cool model differed. The heatpump...
Forum: Geothermal & Heat Pumps 11-16-14, 09:32 AM
Replies: 331
Views: 61,976
Posted By RB855
Youll only find pressure sensors on very high end...

Youll only find pressure sensors on very high end equipment, sometimes top of the line residential, or large commercial chillers, youll never see it in normal everyday stuff. If I can get my butt...
Forum: Geothermal & Heat Pumps 11-16-14, 12:07 AM
Replies: 331
Views: 61,976
Posted By RB855
Have been following this for a while now (just in...

Have been following this for a while now (just in case my chinese heatpump waterheater controller ever failed), and while working on a window shaker the other day something occurred to me. The unit...
Forum: Geothermal & Heat Pumps 01-01-14, 06:13 PM
Replies: 34
Views: 8,389
Posted By RB855
Consider this. you have 1 lb of liquid. now...

Consider this. you have 1 lb of liquid. now turn it to gas. Its going to do 1 of 2 things. Its going to take up a lot of space, or its going to make a lot of pressure. I get the feeling you...
Forum: Geothermal & Heat Pumps 01-01-14, 12:33 PM
Replies: 34
Views: 8,389
Posted By RB855
In my learning, there wasn't really a basics...

In my learning, there wasn't really a basics page. I dove into refrigeration with operational knowledge and nothing else. I didn't know there were so many different compressor configurations, how...
Showing results 1 to 25 of 46

 
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