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Old 07-15-2012, 10:58 PM   #1
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Hard start capacitor on cool cat 10,000 btu heat pump

I just bought a Flagstaff A-frame and have a Champion 2000 generator on the way. My trailer has the Cool Cat 10,000 btu heat pump/ac.

I believe the Cool Cat runs on 1,500 watts but has 3,000 surge watts. I would like to install the hard start capacitor and see if the Champion will run the AC.

Here is a link to the capacitor: Amazon.com: Part No. SPP6 Series PTC Capacitor Combination, Operating Voltage (VAC) 90 - ...: Home Improvement
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Old 07-15-2012, 11:11 PM   #2
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someone else, on here, tried the hard start capacitor but didn't have any luck.
u aren't going hurt anything by installing it. it may help.
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Old 07-16-2012, 02:06 AM   #3
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This is my first post and what I know about RV's, air-conditioners, amps, watts etc. is EXTREMELY LIMITED. I have never even owned an RV before but I am getting ready to buy a Rockwood A124 and have been researching the same thing you are asking about. First of all I think that your wattages MAY be a little off but then again I might be wrong. I'm guessing the actual wattage for a Cool Cat 10,000 BTU unit is most likely around 700 to 1,000 watts depending on set fan speed... MAYBE 1,400 to 2,000 watts when the compressor initially kicks in. There evidently are other factors involved in start up current requirements such as outdoor temperature, A/C head pressure (whatever that is) and altitude (for the generator). I could not find the manual or specs for the Dometic Cool Cat unit so this is all basically theory. If someone has a manual or the specs for this unit, please feel free to chime in. The hard start capacitor can only help but maybe not as much as some are claiming. After more Internet digging than I care to admit, I came across an article which I know that you will be very interested in. It does a comparison between the Supco Capacitor ($20) and the Dometic Smart Start device ($400) and gives a detailed breakdown of current requirements for compressor start up. I am wondering if it is possible to run the Cool Cat 10,000 BTU equipped with a Smart Start device off of a 1,000 watt Honda or Yamaha generator. If the Cool Cat would run off of 1,000 watt generator, the generator would be running at 75% to 100% of capacity (depending on how many watts it's using) which means it would be screaming. I am certain that a 2,000 watt generator would run the unit with a whole lot less work than the 1,000 watt unit and without the Smart Start device. Please look at this link which is testing done by the Dometic Marine Division and compares a 16,500 BTU unit using the Supco Capacitor and then the Smart Start device. Too bad the smart start device isn't a whole lot cheaper.

Now the obvious question here is why buy a $850 1,000 watt Honda/Yamaha generator and a Smart Start device which would total up to about $1,250 when you could just buy the 2,000 watt Honda/Yamaha generator for $1,000 and be done with it? Well the 2,000 watt generator will be running at about 45% of rated capacity and probably be quiter than a 1,000 watt unit running at 75% -100% capacity. There's also a possibility that since the 1,000 watt unit is running near maximum that it might use more fuel than the 2,000 watt unit that is just loafing along. Of course the 1,000 watt unit is smaller and lighter than a 2,000 watt unit and this is why I started looking at this merry-go-round in the first place.

Again all this is theory and guessing. Remember about the only thing I'm an expert in, is getting old and fat so take everything I just said with a grain of salt.

I cannot wait to get my A124!!!
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Old 07-16-2012, 09:14 AM   #4
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Great info. I will probably try the $20 option first. Just need to find someone who has done it. My Champion is a refurb and the seller is an authorized Champion dealer who claims they are updated to latest specs and firmware. Probably won't work but I guess there's always a chance.
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Old 07-16-2012, 12:04 PM   #5
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I would try it first without the capacitor just for curiosity sake. Let me know what you find out. Also if you you get that capacitor, be careful. I think it can hold enough current even disconnected to KILL YOU! Hopefully someone on here will chime in about that as I am not very knowledgeable about those things.

Also let me know if you have run the A/C and how it performed. I am in Texas and hope it works well. I had a salesman tell me that it would freeze you out but who knows?

By the way, which model A-frame did you get? I am looking at the Rockwood A124?
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Old 07-16-2012, 12:23 PM   #6
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Quote:
Originally Posted by Maranatha View Post

Also let me know if you have run the A/C and how it performed. I am in Texas and hope it works well. I had a salesman tell me that it would freeze you out but who knows?

By the way, which model A-frame did you get? I am looking at the Rockwood A124?
Last summer we were working a job for 4 days in 108 degree temps at 75+ % humidity. We had our camper with us for midday breaks, eating and to sleep in. Our aframe was parked under shade trees, plugged into 30amp service and the Coolcat preformed beautifully. It was so hot that the fridge couldn't keep up even though it was on ac current and in the shade all day. Gary and I are convinced that we couldn't have survived the work if it wasn't for our aframe and the Coolcat. The 10K BTU coolcat was one of the many major factors for buying this brand over the Aliner, which comes with a 5000 BTU AC unit.

We have the Rockwood A126.
Deb
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Old 07-16-2012, 01:00 PM   #7
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Thanks for that information Gary. It is helpful. Sometimes people tell you an air-conditioner works well but they have never had there trailer anywhere above 80 degrees.

I've read from some people that the refrigerator works better on propane than electricity. Not sure why, but I've read it too many times to dismiss it.

I will hopefully be picking up my new A124 in the next few weeks. Thanks again for your input.
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Old 07-16-2012, 01:31 PM   #8
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I've read from some people that the refrigerator works better on propane than electricity. Not sure why, but I've read it too many times to dismiss it.
Yes, Gary said that he agrees that is true, but, like you, doesn't know exactly why propane works better. At that time it was so hot and we were so fried that we weren't thinking straight.

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I will hopefully be picking up my new A124 in the next few weeks. Thanks again for your input.
Congrats and

Deb
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Old 07-16-2012, 03:44 PM   #9
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I have the generator you are talking about. Its lightweight, quiet and works like a charm. We had 103 degree temps this weekend with high humidity and I didnt really need the a/c - jist used the fan on high and turned on the vent above to pull out the heat...it sure cooled us off within minutes. The fridge did fine -I think of it as a glorified cooler without the ice.
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Old 07-16-2012, 06:38 PM   #10
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Hammick

This will be great if it works. I will be waiting for your results. I also have a rockwood aframe and champion 2000 generator.
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