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Fujitsu Mini Split AOU36RLXFZ ?
Danscrew
Member Posts: 130
I can remove a fujitsu (AOU36RLXFZ) 3 ton mini split from a commercial space with 2 18,000 BTU wall mount evaps. The unit has been running for roughly 4 years constantly on low speed the condenser has been inside a fan room looks brand new. My question is how long do these units last? I would be using it in my house maybe 2-3 months a year whats the working life of this unit thanks Dan
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If installed properly it could easily go 15-20 years.Danscrew said:I can remove a fujitsu (AOU36RLXFZ) 3 ton mini split from a commercial space with 2 18,000 BTU wall mount evaps. The unit has been running for roughly 4 years constantly on low speed the condenser has been inside a fan room looks brand new. My question is how long do these units last? I would be using it in my house maybe 2-3 months a year whats the working life of this unit thanks Dan
If installed poorly, a few months to a few years.
Minisplits need a very good vacuum pulled, preferably below 250 microns and they have a minimum lineset length you need to pay close attention to.
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment0 -
Yes Chris pulling and holding a vac are two different animals.1
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Good point, I should've mentioned that. "Pulled to" is misleading.GW said:Yes Chris pulling and holding a vac are two different animals.
To me, when I say "preferably below 250 microns" I mean with the system isolated from the pump after 15-20 minutes.Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment1 -
Sounds like we are spliting hairs here ...
There was an error rendering this rich post.
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Perhaps, but you'd be surprised.Big Ed said:Sounds like we are spliting hairs here ...
Isolating the pump and waiting to ensure there's no moisture in the system is important.
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment0 -
Grab it and run. That is an excellent system.0
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Ever hooked up a vacuum gauge to the far side of a system? It tells the tale. Vacuum moves very sluggishly and slow, unlike pressure. The only way to see where a system is while under vacuum is to blank it off and see where the gauge stabilizes.0
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IIRC, most mini's only have a hose connection on the suction "wide" line. The way to flush & bleed air/nitrogen is to loosen the liquid flare nut.
For me it seems that pumping down any system that is not virgin takes longer, perhaps the oil left in the inside coil and lineset.
All the parts (TXV, reversing valve etc) subject to problems with moisture and contaminates are inside the outside unit. Inside coil is just copper tubing, should be all you have to contend with as long as the charge is clean inside the unit.0 -
Thanks to all who responded. I was curious with the life span of the units
I've done a few Mini splits in the past few years and will have no problem. With the removal and install and yes the biggest part of the install is drying the system (Nitrogen) by taking your time in pulling a vacuum. Micron gauge is a must1
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