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Search: Posts Made By: jeff5may
Forum: Geothermal & Heat Pumps 11-10-18, 11:28 PM
Replies: 21
Views: 20,966
Posted By jeff5may
Once again this unit is being called back into...

Once again this unit is being called back into service. A co-worker (single mom) decided to ditch the rent payment system and buy a place. Said place is a single wide metal box trailer with a teensy...
Forum: Geothermal & Heat Pumps 04-13-18, 12:45 AM
Replies: 21
Views: 20,966
Posted By jeff5may
The first one I found is part number 42-21786-81....

The first one I found is part number 42-21786-81. Rheem
Forum: Geothermal & Heat Pumps 04-12-18, 05:13 PM
Replies: 21
Views: 20,966
Posted By jeff5may
Run a regular ice cube defrost relay off your...

Run a regular ice cube defrost relay off your module. 4pdt contacts for about 20 bucks with socket. Without socket they are even more thrifty.
Forum: Geothermal & Heat Pumps 04-12-18, 12:06 AM
Replies: 21
Views: 20,966
Posted By jeff5may
With the original window unit conversion, a...

With the original window unit conversion, a 12kbtu unit that plugged into a standard 120 volt outlet, I used a generic defrost control module. The relay had dual throw contacts, so I wired a light...
Forum: Geothermal & Heat Pumps 02-18-18, 05:45 PM
Replies: 21
Views: 20,966
Posted By jeff5may
Quick update on the unit: The unit continues...

Quick update on the unit:

The unit continues to run the way it was built with no problems so far. The defrost function of the control board is very effective and quick to do its job. The thing...
Forum: Geothermal & Heat Pumps 11-09-16, 08:45 PM
Replies: 21
Views: 20,966
Posted By jeff5may
Time for an update. The unit is still alive and...

Time for an update. The unit is still alive and has paid for itself in savings already. I hope it does as well during heating season.

After the initial test, I found the unit a home. My son moved...
Forum: Geothermal & Heat Pumps 05-11-16, 05:45 PM
Replies: 21
Views: 20,966
Posted By jeff5may
You're very welcome. That punch paid for itself a...

You're very welcome. That punch paid for itself a long time ago and just keeps on helping me out. Once I used it a few times, i learned it worked well for other similar tasks as well. It does a good...
Forum: Geothermal & Heat Pumps 05-07-16, 08:52 PM
Replies: 21
Views: 20,966
Posted By jeff5may
I have been trying to integrate an efficient and...

I have been trying to integrate an efficient and effective defrost algorithm into my arduino uno controller all winter. None of the schemes I came up with did the job to my satisfaction. Either the...
Forum: Geothermal & Heat Pumps 12-23-15, 09:13 PM
Replies: 21
Views: 20,966
Posted By jeff5may
Unhappy Ok, I finally got a little free time to have a...

Ok, I finally got a little free time to have a life. Naturally, I used it to play with this unit. Here are some details that didn't stay on my phone last time I took pics....
Forum: Geothermal & Heat Pumps 12-11-15, 09:43 PM
Replies: 21
Views: 20,966
Posted By jeff5may
There is interest growing in the General-purpose...

There is interest growing in the General-purpose controller thread, so I have decided I will be using my manifestation in this unit. It consists of an arduino uno development board, an LCD readout...
Forum: Geothermal & Heat Pumps 12-08-15, 10:49 PM
Replies: 21
Views: 20,966
Posted By jeff5may
Up until around the turn of the century, pretty...

Up until around the turn of the century, pretty much all of the mini-splits used cap tubes to do their bidding. Some of the multi-zone units used a txv for heating mode. The more modern units are...
Forum: Geothermal & Heat Pumps 11-24-15, 09:03 AM
Replies: 21
Views: 20,966
Posted By jeff5may
Stuff used so far: ...

Stuff used so far:

http://www.homedepot.com/catalog/productImages/300/11/117167db-fd5c-4c7c-a041-86d1407af354_300.jpg
RIDGID 101 Tubing Cutter-40617 - The Home Depot...
Forum: Geothermal & Heat Pumps 11-23-15, 10:54 PM
Replies: 21
Views: 20,966
Posted By jeff5may
A top view of the compressor and plumbing:...

A top view of the compressor and plumbing:...
Forum: Geothermal & Heat Pumps 11-23-15, 09:41 PM
Replies: 21
Views: 20,966
Posted By jeff5may
15000 BTU Window A/C heat pump conversion

OK, so I was at my buddy's house figuring out how to insulate his garage, and his neighbor needed help patching his leaking porch roof. While surveying the job site, I happened upon this stray unit...
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