Sanyo 24KHS72 AC/HP DIY install project - Page 17

Xringer · 10-01-10, 02:22 PM

For the down turn coming out of the wall (12 feet up), I pressed a 6" long round dowel
(2.5" to 3" OD round wooden handrail, IIRC) under the tubes and bent them down over the dowel.
That section of the lineset is softer than the main lineset. Easy to bend.

To bend the larger tubing near the outdoor unit, I used a larger round object.
I think it was a bucket. The important thing is holding the tube tightly on the
side of the bending form (bucket?) as you bend the copper.
If it slides, you could end up with a big kink that pinches the ID.
Don't get in a hurry. Take your time and go slow.
I had one small dent form on the elbow of a turn, but it was very minor.
If the lineset lasts for 20 years, I'll be happy.. (or RIPing).

You might be able to use a conduit bender for the job, but you will need
to split the insulating foam and re-glue it later.
The insulating foam makes it a little harder to bend the lineset by hand.
And about impossible for working it with a bending tool..

stefanc · 10-01-10, 06:44 PM

Great thread. I'm just finishing up my Grunaire quad zone install this weekend. It's going to be nice going from a 70% eff. oil boiler and electric baseboard to a 2.4 COP heat pump.

Xringer · 10-01-10, 07:45 PM

Quote:

Originally Posted by stefanc

Great thread. I'm just finishing up my Grunaire quad zone install this weekend. It's going to be nice going from a 70% eff. oil boiler and electric baseboard to a 2.4 COP heat pump.

Is it a unit with inverter technology? If it is, you will find those electric baseboards are going to become dust collectors..
4 zones must mean you have gone for the big BTUs..

You should start up thread about your install when you get time.
This ductless+'inverter technology' is so amazing that just about
every modern country is using it big time.. !! Except in the USA!

I'll bet more people will buying these as energy costs go up..

Heck, I could practically heat and cool my home running my Sanyo
off my little 500watt solar panel array.. But only in the daytime! LOL!!

stefanc · 10-01-10, 07:58 PM

Yep, its an inverter. It has 4x 9k cool / 9.5k heat indoor units. It was the smallest setup I could find with the 4 zones that I needed. I have no idea why more people aren't using these, especially in retrofit situations.

st2288 · 10-01-10, 08:00 PM

I live on Long Island, NY. I hired a company for a 7.9KW solar installation last year. The rebate from the utility company was $3.00 a watt.. plus the 30% fed rebate.. Can't beat it.
They installed a net meter in April of this year. So far I already banked 900Kw. So hopefully with the split air system, I can cut my heating down to a half.. can't wait for all the tools and parts to come it..

Xringer · 10-01-10, 11:55 PM

Quote:

Originally Posted by stefanc

Yep, its an inverter. It has 4x 9k cool / 9.5k heat indoor units. It was the smallest setup I could find with the 4 zones that I needed. I have no idea why more people aren't using these, especially in retrofit situations.

That's for sure! I'll bet there are millions of homes around the country
that could be cooled and heated with a system like yours.

Especially in southern areas where the average winter temps aren't likely
to be extra cold for long periods.

My Sanyo seems near perfect for the climate in the Boston area.
I'm convinced this type system, combined with the older existing
heating system is the perfect hybrid system.
With the older system acting as backup or to supplement the mini-split
when it hits 4 degrees for a few hours.. (Which is rare around here).

Now, I'm wondering what I should do with the wall mounted 18,000 BTU AC,
and the two smaller room ACs in the garage.. (Those are like new)!

Also in storage is an old 6,000 BTU AC we got in 1968!
Before the Moon landing, and it still works,
but I'm taking it in for recycling this month. (-$15).

Xringer · 10-02-10, 12:25 AM

Quote:

Originally Posted by st2288

I live on Long Island, NY. I hired a company for a 7.9KW solar installation last year. The rebate from the utility company was $3.00 a watt.. plus the 30% fed rebate.. Can't beat it.
They installed a net meter in April of this year. So far I already banked 900Kw. So hopefully with the split air system, I can cut my heating down to a half.. can't wait for all the tools and parts to come it..

Wow! 7.9kW is sweet! You are one lucky dude!

If you looked at my power usage for the Sanyo, you already have a good idea
how many kw hours a mini-split system sized for your home is going to use.

Our 1956 ranch house is small at 1,258 square feet, and we are spending
peanuts for heating and cooling.. Beats the hell out of burning oil and
using old-tech power-hog ACs for summer cooling.

The way my Sanyo runs, it's average power usage on average winter days
is so low, it's unbelievable. But, if things got pretty cold and it had to run
at 500 watts all day, that's 12 kWh.. Times 20 cents= $2.40 a day!
Which is less than one gallon of oil would cost. Which I could burn up in 1 hour..

If you have petty good insulation and your house isn't to large,
I can't see why the PV can't handle all the heating and cooling.

I'll be interested in watching your work.. Please post it..

Cheers,
Rich

stefanc · 10-02-10, 09:13 AM

Quote:

Originally Posted by Xringer

My Sanyo seems near perfect for the climate in the Boston area.
I'm convinced this type system, combined with the older existing
heating system is the perfect hybrid system.
With the older system acting as backup or to supplement the mini-split
when it hits 4 degrees for a few hours.. (Which is rare around here).

I'm curious to see how mine performs below the claimed 5*F low heating temp. I've heard that other units worked well below their stated limits. It would be nice to not have to mess around with switching between heat sources.

Xringer · 10-02-10, 10:02 AM

If you get a lot of blowing snow sucked into your outdoor coil, you could require some aux heating.
While your system does it's defrosting cycle(s).

If I think that there is a chance that back-up heat will be needed, I'll pre-set my
oil heat thermostat a bit below the Sanyo's lowest setting. It's a set and forget..

One thing I have done when I know it's going down near zero, is put my hotwater baseboards in free-flow mode.

The thumb screw on top allows boiler water to flow upstairs to the baseboards.
If I use just 3 turns up, the flow is very slow, so the percentage of contribution by burning oil isn't very high.
So, it keeps down the burner run-time.

The problem of my centrally located Sanyo not keeping distant rooms
warm as the living room is gone during Hybrid mode..

And of course when it's super cold outdoors, that's when my north facing den
(with less insulation and loads of glass) wants to cool down the most.
I will be adding more insulation next year. Storms over the 4 sliders
and more foam underneath.

st2288 · 10-02-10, 10:32 AM

I got the solar system just in time. The utility company ran out of rebate money. it dropped from $3.00 to 1.75 in 2 months and still ran out. A lot of the customer waiting are ticked off. The company did my install is supposed to be the biggest here, but if I didn't do my homework. I would be screwed without the web. They didn't design the system correctly and I had to educate the designer .. unreal..
I will post some pict once I get started.
With the 30% back from the fed... can't go wrong.
My 24k btu is from Fujitsu (qualified for the 30% rebate). and my other 12k is from Shinco (i know it is cheap, but for the price it is worth a gamble) ($820 shipped and also qualified for the 30% rebate, just a few buck more than a window unit...why not)

10-02-10, 10:02 AM	#169
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Hybrid mode If you get a lot of blowing snow sucked into your outdoor coil, you could require some aux heating. While your system does it's defrosting cycle(s). If I think that there is a chance that back-up heat will be needed, I'll pre-set my oil heat thermostat a bit below the Sanyo's lowest setting. It's a set and forget.. One thing I have done when I know it's going down near zero, is put my hotwater baseboards in free-flow mode. The thumb screw on top allows boiler water to flow upstairs to the baseboards. If I use just 3 turns up, the flow is very slow, so the percentage of contribution by burning oil isn't very high. So, it keeps down the burner run-time. The problem of my centrally located Sanyo not keeping distant rooms warm as the living room is gone during Hybrid mode.. And of course when it's super cold outdoors, that's when my north facing den (with less insulation and loads of glass) wants to cool down the most. I will be adding more insulation next year. Storms over the 4 sliders and more foam underneath.

10-01-10, 02:22 PM	#161
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	For the down turn coming out of the wall (12 feet up), I pressed a 6" long round dowel (2.5" to 3" OD round wooden handrail, IIRC) under the tubes and bent them down over the dowel. That section of the lineset is softer than the main lineset. Easy to bend. To bend the larger tubing near the outdoor unit, I used a larger round object. I think it was a bucket. The important thing is holding the tube tightly on the side of the bending form (bucket?) as you bend the copper. If it slides, you could end up with a big kink that pinches the ID. Don't get in a hurry. Take your time and go slow. I had one small dent form on the elbow of a turn, but it was very minor. If the lineset lasts for 20 years, I'll be happy.. (or RIPing). You might be able to use a conduit bender for the job, but you will need to split the insulating foam and re-glue it later. The insulating foam makes it a little harder to bend the lineset by hand. And about impossible for working it with a bending tool..

10-01-10, 06:44 PM	#162
stefanc Helper EcoRenovator Join Date: Sep 2010 Posts: 33 Thanks: 9 Thanked 1 Time in 1 Post	Great thread. I'm just finishing up my Grunaire quad zone install this weekend. It's going to be nice going from a 70% eff. oil boiler and electric baseboard to a 2.4 COP heat pump.

10-01-10, 07:58 PM	#164
stefanc Helper EcoRenovator Join Date: Sep 2010 Posts: 33 Thanks: 9 Thanked 1 Time in 1 Post	Yep, its an inverter. It has 4x 9k cool / 9.5k heat indoor units. It was the smallest setup I could find with the 4 zones that I needed. I have no idea why more people aren't using these, especially in retrofit situations.

10-01-10, 08:00 PM	#165
st2288 Helper EcoRenovator Join Date: Sep 2010 Posts: 66 Thanks: 6 Thanked 2 Times in 2 Posts	I live on Long Island, NY. I hired a company for a 7.9KW solar installation last year. The rebate from the utility company was $3.00 a watt.. plus the 30% fed rebate.. Can't beat it. They installed a net meter in April of this year. So far I already banked 900Kw. So hopefully with the split air system, I can cut my heating down to a half.. can't wait for all the tools and parts to come it..

10-02-10, 10:32 AM	#170
st2288 Helper EcoRenovator Join Date: Sep 2010 Posts: 66 Thanks: 6 Thanked 2 Times in 2 Posts	I got the solar system just in time. The utility company ran out of rebate money. it dropped from $3.00 to 1.75 in 2 months and still ran out. A lot of the customer waiting are ticked off. The company did my install is supposed to be the biggest here, but if I didn't do my homework. I would be screwed without the web. They didn't design the system correctly and I had to educate the designer .. unreal.. I will post some pict once I get started. With the 30% back from the fed... can't go wrong. My 24k btu is from Fujitsu (qualified for the 30% rebate). and my other 12k is from Shinco (i know it is cheap, but for the price it is worth a gamble) ($820 shipped and also qualified for the 30% rebate, just a few buck more than a window unit...why not)