Heat pump H2O water heaters?? - Page 6

NiHaoMike · 11-14-13, 01:29 PM

Are they asking for the broken unit back? If not, have a go at fixing it yourself. Sounds like a pipe rubbed through/cracked and started leaking.

workaholic · 11-14-13, 01:37 PM

So far they are not. And that sounds like a good idea. Thanks

NiHaoMike · 11-14-13, 10:46 PM

http://hometips.me/Mar/GE-heat-pump-...anual-2009.pdf
Quite a bit of interesting info. It uses two Delta evaporator fans with Cindy Wu sensorless FOC (more or less the same as what I'm using in my design!) and a TXV, but oddly seems to use a refrigerator compressor instead of an air conditioner compressor. I presume that is because a refrigerator compressor does better with large compression ratios, with the controller constantly monitoring the compressor current draw (with the Hall sensor) and dialing back the fans to prevent compressor overload. That can be quite a bit at higher ambient temperatures, hence the (relatively) poor efficiency compared to a cheap window A/C.

11-14-13, 01:29 PM	#51
NiHaoMike Supreme EcoRenovator Join Date: Oct 2008 Location: Austin, TX Posts: 1,154 Thanks: 14 Thanked 257 Times in 241 Posts	Are they asking for the broken unit back? If not, have a go at fixing it yourself. Sounds like a pipe rubbed through/cracked and started leaking. __________________ To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...

11-14-13, 01:37 PM	#52
workaholic Lurking Renovator Join Date: Jan 2011 Location: evansville, indiana Posts: 18 Thanks: 1 Thanked 1 Time in 1 Post	So far they are not. And that sounds like a good idea. Thanks __________________ If there are two ways to do a job always choose the hardest; it'll take twice as long but you will learn twice as much.

11-14-13, 10:46 PM	#53
NiHaoMike Supreme EcoRenovator Join Date: Oct 2008 Location: Austin, TX Posts: 1,154 Thanks: 14 Thanked 257 Times in 241 Posts	http://hometips.me/Mar/GE-heat-pump-...anual-2009.pdf Quite a bit of interesting info. It uses two Delta evaporator fans with Cindy Wu sensorless FOC (more or less the same as what I'm using in my design!) and a TXV, but oddly seems to use a refrigerator compressor instead of an air conditioner compressor. I presume that is because a refrigerator compressor does better with large compression ratios, with the controller constantly monitoring the compressor current draw (with the Hall sensor) and dialing back the fans to prevent compressor overload. That can be quite a bit at higher ambient temperatures, hence the (relatively) poor efficiency compared to a cheap window A/C. __________________ To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...

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