42K, 3 zone Mitsubishi here in the high desert of Central Oregon!!

[Adlerberts-Protege]

Haven't posted anything in a while. Been busy with life, new baby, building my business up.

Here is a Mitsubishi Multi-zone system I completed on Monday. 5 zone 42k outdoor unit, only used 3 ports. 24K wall unit for main living space, 9k concealed ducted for bedrooms/bath, and a 9k wall unit for the basement ADU.

Turned out real nice, the place is damn comfortable. The concealed ducted got the MHK2 wall thermostat, the wall units have their remotes.

[Adlerberts-Protege]

Oh, and there is plenty of slope on those drains. That picture made them look strange.

[jacob-k]

Every single 5 zone 3 1/2 ton I've installed I've been called back cause main zone is a piss poor performer when a second zone is turned on in very hot or cold climate.

Well it only has 23kbtu at 17* so its pretty poor performer for heating anyways. The added issue with main zone just complicates things.

I haven't installed one in about 3 years due to issues.

That said we have 3 Hyperheat 5 zones on schedule....



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[kklobas]

The hyper heats are much better with the heating still 100 percent to 5 degrees. It gets -20 here so I always insist they have a form of back up heat. Baseboard, radiant,etc... I also do not go over 100 percent condenser capacity. Putting 120-130 percent indoor to outdoor capacity is asking for trouble.

[jacob-k]

those are high wall units installed up high. why does the track go to the ground?

also, without using a wall penetration piece of track its not closed so rodents can get in the track at ground level and make nests in the track, probably eat through anything you used to close the hole between wall unit and outside and then get into the back of the wall mount inside the house....

[jacob-k]

But I suppose they could get in at the unit if they wanted to get in track.

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[Adlerberts-Protege]

But I suppose they could get in at the unit if they wanted to get in track.

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Ya, at 15 bucks a fitting, I am not buying any of the "duct ends" fittings. I always let the customer know they need to spray foam all ends. I don't do it because I don't want to be responsible for the mess that crap makes.

The line-hide carries down all the way because the drains are in there. Looks better than having some 3/4 pvc sticking out the side of it.

And this system is performing beautifully. It is a 3 1/2 ton with exactly 3 1/2 tons of capacity on it. I had all 3 zones heating away @ 25 ODT, and all had the same splits.

[jpingram55]

Looks dope! Question, the secondary pan, can you add a float switch to the unit? I can’t recall 100% but awhile ago when I was still doing installs I had one of these concealed units and I don’t it was possible without voiding warranty.

[Unlimited1]

looks good, i only wish you did not use the white insulated line sets, the copper in them are known for rotting out...its something i see a lot of but not the on dual black insulated linesets..

[Adlerberts-Protege]

looks good, i only wish you did not use the white insulated line sets, the copper in them are known for rotting out...its something i see a lot of but not the on dual black insulated linesets..

Haven't had a single on develop a problem. This is going back 10 years.

I have seen the other threads about them and I just haven't seen it. I prefer to pull the white ones because they do not tear. Black insulated linesets tear just looking at them.

[Adlerberts-Protege]

Looks dope! Question, the secondary pan, can you add a float switch to the unit? I can’t recall 100% but awhile ago when I was still doing installs I had one of these concealed units and I don’t it was possible without voiding warranty.

They do make one that works with the minis, but at 160 bucks my cost, nope. Pipe out the secondary and let the customer know if it drips, call me.

[Adlerberts-Protege]

The hyper heats are much better with the heating still 100 percent to 5 degrees. It gets -20 here so I always insist they have a form of back up heat. Baseboard, radiant,etc... I also do not go over 100 percent condenser capacity. Putting 120-130 percent indoor to outdoor capacity is asking for trouble.

Depends on the load and the customer's needs. If they have a daytime, nighttime change of loads then oversizing is fine. Have very few complaints with ductless installs I do. 10x as many with ducted solutions. That is a fact!

[Unlimited1]

Haven't had a single on develop a problem. This is going back 10 years.

I have seen the other threads about them and I just haven't seen it. I prefer to pull the white ones because they do not tear. Black insulated linesets tear just looking at them.

i use 2" pvc cut in half to act as a temp sleeve in an opening and have patience...sometimes i leave the pvc in place when its through masonry and fire foam the inside..no problems with it...fire foam is required in my area when going through a fire rated wall and masonary to stop any draft and keep fire codes..

[R600a]

Haven't had a single on develop a problem. This is going back 10 years.

I have seen the other threads about them and I just haven't seen it. I prefer to pull the white ones because they do not tear. Black insulated linesets tear just looking at them.

Mueller has a new black lineset that is extremely durable.

Sent from the Okie state usin Tapatalk

[Adlerberts-Protege]

Mueller has a new black lineset that is extremely durable.

Sent from the Okie state usin Tapatalk

Have not had a single jmf or pdm lineset with issues so I will stay the course.

[GenesisRefrig]

I’ve never put in a Mitsubishi ducted unit. How did you split up the supply to the bath and bedrooms. The picture almost looks like a couple of insulated flex ducts are jammed inside a bigger insulated flex duct. Is there a sheet metal plenum under there somewhere? What about returns? Do you do one from each room?

[Adlerberts-Protege]

I’ve never put in a Mitsubishi ducted unit. How did you split up the supply to the bath and bedrooms. The picture almost looks like a couple of insulated flex ducts are jammed inside a bigger insulated flex duct. Is there a sheet metal plenum under there somewhere? What about returns? Do you do one from each room?

My supplier makes a square to round fitting that does what is necessary. Re-look at the picture my friend. The silver crap is the insulation I used to insulate this fitting.

Central return in the hallway.