I live in Arizona with my dog. Trailer was getting hot at 107 outside last week so I put the Reflectix on all the windows. Lowered the temp by 5 degrees. Still warm in the main living area. I ordered a mini split and will install it but don't have a clue how to wire up the compressor. Wondering if there are any unused breakers in the box in the trailer? I will hire an electrician but figure for a 110 compressor it would be easier if I have an unused breaker.
Mini split
- Thread starter Gleninaz
- Start date
Jim Beletti
Elite Member
Open the lid on your AC breaker panel and take a look at it to see of you have any blank spots.
Which mini-split (brand and model) did you buy? Is it a 120v or 240v system? When using shore power to run a 240v mini-split, you'll need 50A power as it will be the split-phase power a 240v mini-split needs.
Jim Beletti
Elite Member
Hi @Gleninaz - few of us on this forum are electricians are HVAC techs. So please be careful with the assistance you receive here and treat is as ideas / guidance and not as a how-to. The how-to is on you to know or learn or hire-out.
That said, I took a look at the manual for one Mr. Cool mini-split and gleaned the info below. It's doubtful I correctly guessed your model number, so use this info carefully and cross check with what you actually have and the manual that came with it.
A 115-120V unit will require 3 conductors of the correct wire gauge. Those conductors will connect to your power system's line, neutral and ground. Generally speaking, all 3 can be found inside the AC panel box:
- L (line) will come from a breaker
- N (neutral) will come from the neutral bus
- G (ground) will come from the ground bus
Use of the proper AC wire gauge is critical for all AC wire circuits. Below is a table from a Mr. Cool mini-split manual showing the minimum wire gauge to be used based on the size of the mini-split model.
I urge you to have a conversation with Mr. Cool customer support, detailing your installation plans with them and let them guide you on aspect such as:
- Mounting ideas of outdoor unit
- Ventilation idea of outdoor unit
- Wire type, gauge and jacket/conduit type for outdoor unit
- Circuit breaker type and rating for outdoor unit
That said, I took a look at the manual for one Mr. Cool mini-split and gleaned the info below. It's doubtful I correctly guessed your model number, so use this info carefully and cross check with what you actually have and the manual that came with it.
A 115-120V unit will require 3 conductors of the correct wire gauge. Those conductors will connect to your power system's line, neutral and ground. Generally speaking, all 3 can be found inside the AC panel box:
- L (line) will come from a breaker
- N (neutral) will come from the neutral bus
- G (ground) will come from the ground bus
Use of the proper AC wire gauge is critical for all AC wire circuits. Below is a table from a Mr. Cool mini-split manual showing the minimum wire gauge to be used based on the size of the mini-split model.
I urge you to have a conversation with Mr. Cool customer support, detailing your installation plans with them and let them guide you on aspect such as:
- Mounting ideas of outdoor unit
- Ventilation idea of outdoor unit
- Wire type, gauge and jacket/conduit type for outdoor unit
- Circuit breaker type and rating for outdoor unit
Jim Beletti
Elite Member
Wow - that's great news. Can you share some pictures of your installation (indoor and outdoor units?