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Forum: Geothermal & Heat Pumps 01-20-15, 09:59 PM
Replies: 34
Views: 33,759
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, 09:30 PM
Replies: 34
Views: 33,759
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, 10:58 PM
Replies: 34
Views: 33,759
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 01-01-14, 05:13 PM
Replies: 34
Views: 33,759
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, 11:33 AM
Replies: 34
Views: 33,759
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...
Forum: Geothermal & Heat Pumps 12-31-13, 05:11 PM
Replies: 34
Views: 33,759
Posted By RB855
Now, Im absolutely not an expert on this stuff,...

Now, Im absolutely not an expert on this stuff, and should be fully verified before you use it to make any decisions. There are several things that must be considered when selecting a gas, type of...
Forum: Geothermal & Heat Pumps 12-31-13, 04:10 PM
Replies: 34
Views: 33,759
Posted By RB855
Personally, flammability doesn't bother me. If...

Personally, flammability doesn't bother me. If you vac out the system, it's not flammable without air. So what might happen while brazing on the system, a surprise candle? As long as there isn't...
Forum: Geothermal & Heat Pumps 12-31-13, 09:40 AM
Replies: 34
Views: 33,759
Posted By RB855
Iv heard that mentioned before concerning...

Iv heard that mentioned before concerning hermetic hybrid car compressors. They strongly suggest not charging prius without purging your equip, for example. Fortunately I only have traces of pag...
Forum: Geothermal & Heat Pumps 12-31-13, 07:07 AM
Replies: 34
Views: 33,759
Posted By RB855
In my hurry to reply before bed, I forgot to...

In my hurry to reply before bed, I forgot to explain some of the bigger deciding factors of choosing r-134a. Using a constant of 54* evaporating, 150* condensing temperatures.
R-410a pressures...
Forum: Geothermal & Heat Pumps 12-30-13, 11:27 PM
Replies: 34
Views: 33,759
Posted By RB855
Trouble is, this unit only adds a couple/few...

Trouble is, this unit only adds a couple/few degree rise to the water, requiring multiple passes. Dialing back the flow would overcome this, but that sounds like quite a balancing act (perhaps only...
Forum: Geothermal & Heat Pumps 12-30-13, 09:52 PM
Replies: 34
Views: 33,759
Posted By RB855
I should also note that, I have so much condenser...

I should also note that, I have so much condenser surface area, the liquid leaving temp has a almost 0* delta to water inlet temp. Something on the order of 2 tons capacity, pushing 1/2 a ton of...
Forum: Geothermal & Heat Pumps 12-30-13, 07:24 PM
Replies: 34
Views: 33,759
Posted By RB855
The reason for r-134 is because it's readily...

The reason for r-134 is because it's readily available, I already have 30lb as well. I will never run above 130*F, 115*F makes for good shower times and temps. Also the higher super heating I...
Forum: Geothermal & Heat Pumps 12-30-13, 12:00 AM
Replies: 34
Views: 33,759
Posted By RB855
The defrost is time/temp based. If the...

The defrost is time/temp based. If the controller sees the evaporator below 25*F for 90minutes, it will enter defrost. At this point, the controller turns off the evap fan, and energizes the...
Forum: Geothermal & Heat Pumps 12-29-13, 12:06 AM
Replies: 34
Views: 33,759
Posted By RB855
*Saved post* I forgot to mention, the goal...

*Saved post*

I forgot to mention, the goal of this unit is to store heated water in a un-powered electric 50gal waterheater. I may leave the elements in, and use a outdoor ambient thermostat to...
Forum: Geothermal & Heat Pumps 12-28-13, 11:49 PM
Replies: 34
Views: 33,759
Posted By RB855
Another DIY HP Waterheater (pics and info)

First new thread from a lurker, this is mostly a documentary to spread what I have learned. I have been slowly poking at a heat pump waterheater project for years now. Iv lost count of how many...
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