View Single Post
Old 10-12-11, 09:49 PM   #12
Supreme EcoRenovator
AC_Hacker's Avatar
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,002
Thanks: 303
Thanked 707 Times in 529 Posts

Originally Posted by zick View Post
...I was kind of surprised that your Sanyo could run on a single 20A breaker.
Just putting this in here to make sure everybody knows...

The breaker for your HVAC device needs to be a bit less than the Locked Rotor Amps (AKA: LRA). This is the worst case scenario when the compressor's rotor is unable to turn, but still has FULL ELECTRICAL POWER applied. This situation MUST trip the breaker switch, or terrible things will happen.

The breaker also needs to be big enough to allow the HVAC equipment to run under full load.

The installation instructions will spell all of this out for you.

Unfortunately, this is one situation where you DO need to read the instructions.

This is very important.

I'm not an HVAC technician. In fact, I'm barely even a hacker...
AC_Hacker is offline   Reply With Quote