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So I'm in an HVAC class. My lab was a unit change out. Everything was going smooth and easy, until I tried to raise the head pressure to 278 psig. The first time I got my head pressure up around 278 psig. While measuring my subcool(which was fluttering around 20 degrees) the high pressure switch cut out. After that It cut out at around 160psig. I bypassed the hi/lo pressure switches, because they kept tripping, and raised head pressure to 200 psig. Above that and the compressor cuts out while the condenser fan keeps blowing. I weighed in the charge of 5.8 lbs of R-22, like the label on the unit called for, if anything it is overcharged. I pulled a triple evac. It is not on me yet to troubleshoot this unit, but I hate failure. This one has two of my instructors suspecting different causes; bad compressor or undercharge. Any ideas? To raise the head pressure, we wrap the coils with plastic and limit airflow. I say it is overcharged because 5.8 lbs is a complete charge with 25' of lineset. This unit has approximately 19' of lineset. The evap coil was not replaced with the condenser. The TXV works fine, it maintains 10 degrees superheat. I think I got everything. The filter drier is just a standard issue. About the size of an orange. The sight glass has a few stray bubbles, which I have received mixed information on. A short time instructor said a proper charge should show no bubbles, another instructor said a proper charge would show some bubbles. The subcool number does show an undercharge...either a coolant loss or I had the scale set to kilos? I think it was a potential relay. All those little black boxes look the same, and I could not see the wiring diagram without removing it from the unit. discharge temp. was around 85-110, the higher number with higher pressure. hermetic, scroll, 208 volt, high temp, used residential unit. We have dozens of A/C's, I swapped out a 13 SEER unit for an antique 12 SEER Rheem. I don't remember the amp draw, but it did increase as pressure rose. This problem developed near the end of the day. So we didn't have time to start troubleshooting. School is closed till Monday, but I have been pondering this since last night. From the questions you have led me with, I tend to suspect the compressor. The compressor was extremely hot to the touch. I think it was a potential relay. I could not read the schematic on it. I admit I am a rookie with no practical field experience. evap pressure stays steady at 70 psig. The pressure rises to around 80 psig when head pressure is forced up to 200 psig.

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I'm buying fabric for my couches and I wanted to know if a blend of wool and polyester would be a good fabric.. I want something that is colour durable, easy to clean and would last a long time.. OH and something that wont lint up when i put it in the wash.. if anyone knows of such fabric please let me know.. thanks in advance

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I'm not sure if I make sense to you, this is hard to explain. Basically there is a hole or groove about a inch deep in the sheetrock where he failed to snap the board clean. The grove is located in the middle on the ending. Now when I tape over this I can sorta see that I'm taping over a hole in a wall. I feel like this is not the proper way to do it and it can easy be "punched" through later on. What can I do to fix this gap so I can tape over something solider and the paste?

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Do I have to plant them in the fall, like now, or can they be planted in the spring. Tulips etc...etc.

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I always thought you were supposed to trim them in springtime, but right now those little spindly branches with no leaves on them look pretty easy to trim to the height I want them at ......

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I brought Heart Shaped Handwarmers from iwoot.com and your meant to boil them for 20 minutes to reuse, i boiled them too long and almost burnt my kitchen down :( and now it stinks >.< how'd i get fumes out QUICK omg, thanks so much everyone who commented :P she found out, but i think she's calmed down a bit, fingers crossed :D omg, thanks so much everyone who commented :P she found out, but i think she's calmed down a bit, fingers crossed :D

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I got goose poop on the sleeve of my good jacket and on my new jeans. I've washed the jeans a few times, and the stain is still there. I washed them within 10 minutes of getting the stain. Are there any stain removers or bleaches I can use..? Thanks! Marisa- I would pick you for best answer, but the vinegar actually worked (: I got the stains out, thanks for the help everybody (:

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okay, I am having problems with this stupid fan, I am sure I have the wires connected right, the green is connected to the bare, the white to the white, black to black and red to blue. But when I turn on the switch, the fan doesnt turn on. Its not the breaker, it has power.. what should I do? yes i tried the chains, but it still doesnt work. I just tried rewiring it, (ceiling first) white to white, black to blue, red to black, and bare to green, and the second switch worked with the fan, but the light still doesnt work. i have 2 switches and no idea what you mean by hots the fan has a blue, green, white, and black wire. the ceiling has white, black, bare and red. I have no idea what to hook up and what not, and I moved this from one room to another, so I dont have a manual. okay randy so to attach the fan to one switch attach them both to the black one? well i tried attaching both the blue and black from the fan to both the black and the red from the ceiling. if they are attached to the black, nothing works. If they are attached to the red, the light works, but the fan still doesnt okay i have the light turning on, but the fan isnt working, i think you are right and that there is a problem with the switch wiring. Is it difficult to fix this?

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Is it the type of material they used? Does rayon, polyester or spandex have been known to do this? Also, which is softer, rayon or spandex?