RLA verses FLA - HVAC-Talk
Apr 14, 2008 · RLA is a mathematical calculation required to meet Underwriters Laboratories (UL) approval. The compressor manufacturer must run a series of tests to determine the Maximum …
AMPS ?? R.L.A.,F.L.A.,L.R.A. - HVAC-Talk
Jul 6, 2012 · RLA - Rated Load Amps: The maximum current a compressor should draw under any operating conditions. Often mistakenly called running load amps which leads people to …
About RLA | HVAC-Talk: Heating, Air & Refrigeration Discussion
Nov 4, 2004 · What mean RLA?...I know that literally mean Rated Load Amperage, but my question is what really means. Example: a compressor nameplate say RLA=16, but an …
FUSE SELECTION PROCEDURE CHART FOR WELDED COMPRESSORS AND COPELAND SCROLL COMPRESSORS Determine Rated Load Amps (RLA) from nameplate or Section F. …
Compressor contactor ratings - HVAC-Talk
Feb 10, 2011 · Can someone provide an accurate explanation for compressor contactor ratings such as double pole, single pole,FLA, LRA,RLA,RES ,etcetera. I understand what each stands …
FLA and RLA..............Whats the technical difference?
Jul 7, 2006 · RLA is a rating point that manufactures use to help guide you in selecting a contactor for a compressor. It is a "Rating" indicator. FLA is a thing of the past, for compressor stamping, …
Centrifugal chiller run unload vs starts - HVAC-Talk
Sep 25, 2023 · I've seen some with oversized motors not go below 70% of rla. Wsc with a vfd can unload to ~5% of the rated load. Look at the evap delta T and flow rate to determine capacity …
No Superheat No Subcooling - HVAC-Talk
Jun 23, 2025 · Need help diagnosing 2.5 ton system. Going back tomorrow to check piston and try to pump down system but what do you guys think? Compressor rated RLA 10 running at 7 …
Why do AC motors pull high amps when they go bad?
Sep 5, 2021 · What is the explanation in terms of physics? Let's say that you are doing a tune up, and a compressor has a RLA of 6.0 amps. When you tested the amp draw on the compressor, …
LRA CONVERSION TO TONNAGE - HVAC-Talk
Mar 3, 2006 · LRA & RLA conversions This thread brings a smile to my face, takes me back to the year 1982, the year I first enrolled in HVAC school! We did the same calculations, it was fun. …