Forum Discussion
TKMJ
Aug 09, 2007Explorer
Wgeorge11 wrote:MrWizard wrote:
don't wait for the TT to get hot, start the A/C early in the day
Why?
The issue is the initial start up load demand. The unit "runs for hours" once it is fired up, but should not require unnecessary running before it's needed. He just needs to follow your instructions to switch from auto to propane, and reduce other power demands until the a-c is going. It doesn't matter how hot it is. It might matter how much demand the battery bank requires for charging.
Please correct me if I'm wrong as I'm no 'lectrician.
I would put a hardstart cap kit in the A/C unit and call it good. That's what I have in mine. My 13.5 Coleman A/C peaks at 22 amps then comes down to about 12 to 13A. The rotor lockup current on the compressor is suppose to be 51 amps but since I put the hardstart cap on, It peaks at about 22 amps on start. If it goes any higher, I can't see it on my amp meter. I also have a "peak switch" on my amp meter. It will read and hold the largest current it finds. The highest the amp meter ever read with shore power was 23 amps but I had 200 feet of cord on it attached to the receptical. With a genset the highest peak I ever saw was 25 amps. That was about 4 seconds worth of peak.
The last servicing my A/C unit saw was before I owned the coach back in 1994.
I forgot to tell you guys what hardstart kit I have.
Supco model SPP-6, It is good on all single phase A/C units from 4000 to 120,000btu (1/2 thru 10 hp) with a max load of 22amps. It's perfect for a Coleman 13.5. The Coleman 13.5 is a PSC type unit with a run cap installed at the factory. Just take the hardstart cap and paralell it with the run cap. It tales longer to remove the A/C cover then it takes to make the modification.
Ken
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,210 PostsLatest Activity: Mar 04, 2025