Sanyo mini split AC (inverter/variable speed)

[PhilS]

I don't know if it's just ME, or MY COMPUTER, or the FORUM.

http://www.wind-sun.com/ForumVB/show...2266#post62266

Phil

[Dave Sparks]

I have been taking some data on this wind shield that Sanyo sells. They claim it will save over 5% in KWH if you are in a wind prone area and cannot or do not want to change the direction of the compressor/fan direction in regards to a structure/daily wind pattern. I asked them about just changing the polarity on the DC fan but have not heard back yet...

FYI the adobe file

[mike90045]

Originally Posted by Dave Sparks

. .....I asked them about just changing the polarity on the DC fan but have not heard back yet...

You can change rotation of a brushed DC fan that way, but an electronic one, will have to change differently.
Something like the drum motor of my new HE front loader washer, 6 revs CW, pause 90 sec, 6 rev CCW, pause 90 sec. It's a direct drive DC motor.

[Dave Sparks]

Originally Posted by mike90045

You can change rotation of a brushed DC fan that way, but an electronic one, will have to change differently.
Something like the drum motor of my new HE front loader washer, 6 revs CW, pause 90 sec, 6 rev CCW, pause 90 sec. It's a direct drive DC motor.

You are thinking ahead of me but thanks Mike! I will wait and see what they say. Maybe turn the fan arround 180 the low tech way... Back to work! NOW!

[PhilS]

Originally Posted by Dave Sparks

You are thinking ahead of me but thanks Mike! I will wait and see what they say. Maybe turn the fan arround 180 the low tech way... Back to work! NOW!

I'd think that would be a poor solution.... the fan would be 'sucking' leaves and yard debris into the unit and against the inside of the coils and would be more difficult to keep clean.

On hindsight I might have had better airflow if I'd installed mine parallel to the house instead of a right angle to it since the wind blows parallel to the house. But it works great and I'm not changing anything.

Phil

[Dave Sparks]

Originally Posted by PhilS

I'd think that would be a poor solution.... the fan would be 'sucking' leaves and yard debris into the unit and against the inside of the coils and would be more difficult to keep clean.

On hindsight I might have had better airflow if I'd installed mine parallel to the house instead of a right angle to it since the wind blows parallel to the house. But it works great and I'm not changing anything.

Phil

Not sure about that one Phil, either way a fan is going to have maintenance but you might be right, less easy to clean. The baffle does help if the fan is blowing out into the wind.

Have you ever had a chance to accurately measure the load amps on the 12,000Btu unit?

[PhilS]

Originally Posted by Dave Sparks

Not sure about that one Phil, either way a fan is going to have maintenance but you might be right, less easy to clean. The baffle does help if the fan is blowing out into the wind.

Have you ever had a chance to accurately measure the load amps on the 12,000Btu unit?

We don't get much wind (a windmill at our place would be worthless) but the light breezes we have go one way from mid-morning until late evening, then turn around until the next mid-morning. "up canyon winds" and "down canyon winds". Of course, last night's down-canyon winds brought us the smoke from the 900 acre Bar Fire, about 40 miles away...

I didn't look at load amps. I had a Kill-A-Watt meter on it the last couple of weeks, but including a sat receiver (50w) and an LCD TV (80w), the readout was usually in the 1200 to 1450w range at the highest setting. I compared that with the DC amp reading on the Magnum and they were in line.

The temps have only been in the mid-nineties so we have just been leaving the Sanyo on the lowest speed setting and it's been keeping the house at 77 or lower and only using 300w. When we get back over 100 or 110 I'll put it back to "automatic" and run the gen a couple hours at night if necessary.

Phil

[Dave Sparks]

If you press the high power button on the remote you should go to 130% output and get the max amps. This will stay in this mode for 20 minutes and then go back to the last setting automatically. If you watch the unit over time in any of the fixed power modes except low the power will move around a bit.

I am curious if you are getting a higher reading in this mode! No rush but it would help me with a future install of this size.

Yes it has been a great summer (our best) for nice reasonable weather. Last summer we had the smoke at night from a "controlled" Meadow fire up in the park. It got out of hand a burned some of the best views of Half Dome from hiways 41 and 120. Hope they fired the guy! A little 1KW Honda ran the unit all night during that week. An amazing piece of gear!

I would love to get some data from a user on the 240V Fujitsu mini split units???

Stay cool Phil!

[LucMan]

Those wind baffles are primarily used for Low ambient cooling applications, the baffles keep wind from affecting the system pressures during cold weather. No need for them if used for normal heat pump applications. All the manufacturers have now gone to inverter heat pump only production. So even if you need a cooling only unit you purchase the HP.

As far as Fujitsu data it would be the same as any other inverter unit of equal capacity. They are all the same.
If you need any Fujitsu specs. I have them, except for the new Flex system that will be available within the next month.

[Dave Sparks]

Thanks Luc, I can get the specs also and have in the past. What I would like is Fujitsu user data which as you know, is very valuable. It is why we test to validate. The absolute BTU value is not as important to me as that the system can limit it's output and with the smart grid or?, be controllable. Good that they have a new model coming, I will take a peak. Thanks!