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05-02-2010, 04:49 PM
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#1
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Junior Member
Join Date: May 2010
Posts: 4
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Wiring an a/c boost start capacitor?
Hello
I spent all morning reading through various forum posts trying to figure out how to upgrade my older coleman ac start capacitor. I believe I can use a supco spp6 in place of the relay/factory cap but I'm not sure how to wire it into my system. Would another model capacitor be a better choice in place of the spp6?. I am trying to decrease the starting load in order to run the AC off a yami 2400.
I colored in the wires in question. Does anyone know for sure which wires would go where after removing the relay and adding a supco start cap?
Any help would be greatly appreciated
Thanks
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05-03-2010, 02:38 AM
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#2
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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The SPP6 will do fine. You can do away with the OEM start relay and start capacitor and connect the SPP6 across the run capacitor terminals. The SPP6 has it own start relay circuit internally and will disconnect once compressor is running. The purple wire and black wire must be connected together to provide power to the common terminal of the compressor.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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05-03-2010, 04:22 PM
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#3
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Junior Member
Join Date: May 2010
Posts: 4
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Ok cool, that sounds simple enough.
Terminate purple and black wires together, junk relay and connect new cap across the red and white wires. Awesome!
I just upgraded from and old 1960's telescoping camper to our first motorhome, an 84 minnie winnie. I cant wait to take her out for our first trip. She may not be new, she may not be perfect but the kids think shes the coolest thing they have ever seen 
Thanks for your help.
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05-04-2010, 03:01 AM
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#4
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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You are welcome; enjoy! The kids will not forget the adventures and experiences they will have.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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05-05-2010, 08:55 AM
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#5
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Senior Member
Join Date: Aug 2005
Location: Full Timers - Where ever we're parked.
Posts: 583
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g30,
Please post your results, I'd like to know if I can run my Honda 3000si on ECO mode if I add the spp6. Currently, I can't it trips the breaker but will run just fine in Normal mode.
Thanks
__________________
Paul - WA1IWH
Margaret - She who must be obeyed.
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05-05-2010, 08:54 PM
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#7
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Junior Member
Join Date: May 2010
Posts: 4
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Ok guys I gave the boost capcitor a shot and It didn't help.
After opening up the ac I found that it already had a 105uf capacitor (old malory) which i beleive is right at about the same capaciance as the supco boost cap. I don't regret replacing it since the new cap also replaced the relay so I know I'm good there but I'm still stuck with my stock 3Kw onan chain saw/tornado generator for now. The only thing I should have done was to buy and install a run cap while I was there, Oh well next time. Hey tincup, the honda 3000 you have is what I thought I would probably end up with. It wont run in eco mode though huh? I guess we need that freakin eu6500 boat anchor of a portable gen then
Or maybe just a more efficient ac. How does your eu3000 run using the ac? Is it full throttle just hanging on or does it just putt along smoothly?
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05-05-2010, 10:05 PM
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#8
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club
Join Date: Dec 2009
Location: CA
Posts: 1,289
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What could be wrong if the compressor doesn't start, other than a bad compressor? How do check for a bad compressor vs. other problems?
J
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05-06-2010, 04:36 AM
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#9
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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You need to check the voltage to the compressor & the amperage of the compressor when voltage is applied. If you find you have LRA (locked rotor amperage) then the compressor is bad.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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05-06-2010, 09:13 AM
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#10
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club
Join Date: Dec 2009
Location: CA
Posts: 1,289
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Ballpark, what would the LRA be?
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05-07-2010, 03:19 AM
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#11
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Moderator Emeritus
Country Coach Owners Club Appalachian Campers Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,060
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It is printetd on the side or top of the compressor, but ususally a 13,500 BTU would be around 60 amps.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
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05-07-2010, 09:05 AM
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#12
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club
Join Date: Dec 2009
Location: CA
Posts: 1,289
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Thanks for the info.
J
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05-07-2010, 12:54 PM
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#13
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Senior Member
Join Date: Aug 2005
Location: Full Timers - Where ever we're parked.
Posts: 583
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g30,
The EU3000i just putts along running our 13.4K AC in the bedroom, it'll run 9 hours on a tank of gas. I put a hour meter on it and change the oil every 100 hours. I sure wish I could run it in the ECO mode though 
__________________
Paul - WA1IWH
Margaret - She who must be obeyed.
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05-07-2010, 10:15 PM
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#14
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Junior Member
Join Date: May 2010
Posts: 4
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tincup
I'm brand new to the motorhome deal but after my recent generator research, I'm surprised that the honda cant run your compressor in eco mode. Thats a bummer.
I wonder if anybody here knows if your honda in eco mode can power the newer high efficiency 13500 ac systems or even better if my Yami 2400is has enough guts? It maybe time for an a/c upgrade
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Linear Mode
