Hi all I am a constant CF stalker and post once in a while. There has been a lot of good
advice on here. The most technical and best reply I have read is from gordy. I am a professional honest residential ac tech so ill throw in my two cents.
Gordy is right about seer and eer ratings the higher the ratings the more efficient the unit is as far as running amp draw. Also a unit that is oversized will cycle on and off more and it actually puts more humidity in to the air making you feel hotter because your sweat is not evaporating. a unit that is to small will just run and run. Most peole are concerned about the start amp draw tripping breakers ect. I can tell you that I can take start amps on a unit from 100 to 200 plus amps to 30 to 40 amps some even less. With about 2 hours of
work or less. So here is the golden ticket.. 1. see if there is a start capacitor available for
marine units if so buy the best one. A start capacitor is simply a battery that lets its stored energy to be used up in less than a second and then charges when the unit starts pulling power from the capacitor instead of the house
batteries. 2. If there is a contactor replace it think of old points on a car dame basic idea. If they are worn or pitted it will arch on start up causing higher amp draw. And to keep the unit efficency clean the condensor and evaporative coils this improves cooling and airflow reducing running amps. If the unit is not disapating the heat it is cycling it back through the system. When you wash the air filter remember it is only stopping about 10% of the dust and dirt so imagine years of dust and sticking to the coils. On the your ac or
refrigerator. Sorry im not more detailed but im using my
phone here are a couple of photos of a house ac unit just think marin ac. I was the 4th tech at thus guys house and the only one to show him what was wrong. Before and After photos ok im
posting from a
phone so I MAY have some typos and I tried to look st
marine schematics but on the phone its impossible to read it makes
legal print look like a large font