Few questions about mini split removal and new install

[Tracs]

I am getting ready to remove my PerfectAire mini split and install a new Napoleon Oasis NH25-18F Hyper heat unit in my detached garage.

The current unit is mounted on a cement pad with a lineset length of 10'.

The new unit will be mounted on the wall with a bracket to get it off the ground. The Napoleon unit will make some heat down to -22F and we get lots of snow so I want to have it up on the wall so it doesn't freeze up, like the PerfectAire unit did.

I don't know where the best place or height to mount it would be. I throw some outdoor odds and ends in the back corner behind the garage but only go back there a couple times a year. From the garage to the fence it is 3' of room.

The lineset is the same size for each unit. Can I re-flare/re-use the current lineset?

Can I pressure test the lines with 100% Argon gas or C25 Welding gas? I have both and the regulators for the required pressure. But I might be almost out of Argon.

From the supplied pictures, where would the best location for the new wall mounted unit be?

Ideally I would like to keep the new unit relatively in the same location, just up on the wall 2' or so off the ground so it doesn't ice up.

 

[jlv03]

Since you already have the concrete pad, any thoughts on just using an elevated stand?

 

[Tracs]

Since you already have the concrete pad, any thoughts on just using an elevated stand?

I never thought of that, but that is a good idea.

 

[thammel]

You can buy plastic legs that elevate heat pump units...here is one height from amazon.. I did this on my outside mr slim units.

https://www.amazon.com/dp/B007ID4W4M/?tag=atomicindus08-20

 

[walrus]

You need it higher if you get snow?? They make metal brackets that will get 2ft or so off ground

 

[Jackfre]

You can get some harmonics on a wall mount. I have a 24 dual that I can hear in one room. Not objectionable as that room is lightly used, but you can hear the unit. I’m with Walrus on your height get it up there.

 

[mogandave]

I would mount it on the wall.

Angle-iron frame, unit bolted to it on rubber pads.

 

[fitter30]

Nitrogen is recommended for testing for system leaks and breaking of a vacuum for a triple evacuation. Most systems check at 500 to 600 lbs.

 

[Tracs]

I was checking out a unit at work today. It is mounted 4' off the ground on wall brackets. I liked that height, won't ever get snow buildup on it up there.

The problem becomes at that height and location the lineset would only be 6' long.

I also know nitrogen is recommended for testing for leaks, but I have the Argon.

 

[mogandave]

I was checking out a unit at work today. It is mounted 4' off the ground on wall brackets. I liked that height, won't ever get snow buildup on it up there.

Less dust and grass as well

The problem becomes at that height and location the lineset would only be 6' long.

Why? Move it left four feet.

 

[Kobuck]

I was checking out a unit at work today. It is mounted 4' off the ground on wall brackets. I liked that height, won't ever get snow buildup on it up there.

The problem becomes at that height and location the lineset would only be 6' long.

I also know nitrogen is recommended for testing for leaks, but I have the Argon.

Argon is inert. It will work

 

[Tracs]

Are any of these amazon mounting brackets any good, and any better than what the local HVAC supply house will have for 2-3x the cost?

I probably couldn't buy some angle iron and build one that cheap.

Appli Parts Mini Split Wall Mounting Bracket For Ductless Heat Pump or Cooling Only Units Up To 352lbs APAB-3160 Our Products Are Designed And Produced According To Strict High Quality Standards, Brackets - Amazon Canada

Appli Parts Mini Split Wall Mounting Bracket For Ductless Heat Pump or Cooling Only Units Up To 352lbs APAB-3160 Our Products Are Designed And Produced According To Strict High Quality Standards in Brackets.

www.amazon.ca

https://www.amazon.com/dp/B07FRTK4RP/?tag=atomicindus08-20

 

[Phuckin' Jim]

Those stainless ones are pretty sweet!
Bed frames can be had for free, and you could build brackets out of that, if you are looking to save cash.
If free bed frames can't be found, check scrap yards like Orloff for inexpensive steel sold by the lb.

 

[justinjoyal]

Since you already have a pad I would definitely not recommend mounting the new unit on the walls as it could get noisy inside.

Re-use the pad with a stand.

If you know the previous system was properly installed and was functioning properly (ie no compressor burnout, no leaks, etc) I would not be worried about using the existing lineset.

 

[Tracs]

Since you already have a pad I would definitely not recommend mounting the new unit on the walls as it could get noisy inside.

Re-use the pad with a stand.

If you know the previous system was properly installed and was functioning properly (ie no compressor burnout, no leaks, etc) I would not be worried about using the existing lineset.

If I use a stand on the pad where it is, I don't know what to do about the linest length. It would only be about 6'-7' long.

 

[mogandave]

Splits are mounted on walls the world over. My last home had five splits, and four of five had the condensers mounted to the second-floor walls.

My current home has seven, with none mounted on the walls, but only because there are ledges & balconies mount them on. They are still all mounted directly to the building. When I renovate, I'm hoping to move them all to the roof.

It is pretty common the world over to mount them on the walls, ledges and balconies.

 

[Tracs]

Splits are mounted on walls the world over. My last home had five splits, and four of five had the condensers mounted to the second-floor walls.

My current home has seven, with none mounted on the walls, but only because there are ledges & balconies mount them on. They are still all mounted directly to the building. When I renovate, I'm hoping to move them all to the roof.

It is pretty common the world over to mount them on the walls, ledges and balconies.

I'm not overly concerned with mounting it on the wall. It is a garage I spend little time in.

 

[jjrbus]

Run the line in a serpentine fashion behind the condenser to get to the required length.

 

[PoorUB]

Are any of these amazon mounting brackets any good, and any better than what the local HVAC supply house will have for 2-3x the cost?

I probably couldn't buy some angle iron and build one that cheap.

https://www.amazon.ca/dp/B01ELP98RK

This looks like the one we sold at work, good wall mount, flexible as you can mount the upper bar to the wall and slide the supports to the left or right, where ever you need them.
Contractor price was under $100 a couple years ago.

 

[mike93lx]

I used a diversitech bracket for a mini split at my last house. Very high quality and expensive. https://www.diversitech.com/en-US/i...rackets/wall-brackets---mini-splits--QSWB3000

They also have stands

Quick-Sling® Mini Split - 1200 - QSMS1200 | DiversiTech

www.diversitech.com

 

[Tracs]

I picked up 2 different brackets from my HVAC supply just Incase I decide to mount it on the wall. I still haven't decided. One is the foldable kind and the other is nice coated fixed angle iron type. Glad I didn't think Amazon was going to be cheaper. 2 brackets and a 90 degree linset elbow was only $78.

 

[Tracs]

I think I have settled on a plan as pictured in this crude ms paint picture.

The unit will be mounted 4' off the ground on the wall using the brackets I picked up. The current lineset will come down 6' then over 4' to the new unit. I will use rubber isolation mounts in between the unit and the brackets.