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03-28-2015, 05:27 AM
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#1
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Senior Member
Join Date: Sep 2014
Location: Callaway
Posts: 864
Maryland
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Hard Start Kits
Given that I will be doing some AC maintenance here soon, I am contemplating installing a Hard Start Kit on each of the AC units. Watching the amperage spike on startup is painful...anyone have any experience with them? Before I go digging for manuals or crawling on the roof, any idea of our model numbers?
Cale
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TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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03-28-2015, 09:51 AM
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#2
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Senior Member
Join Date: Aug 2013
Location: Memphis
Posts: 1,616
Michigan
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Cale - I had a hard start capacitor on my previous rig with a single AC unit. I was able to run that unit off a 2800 watt generator without making it jump off the ground and try to stall when the AC kicked in. Once I built my 4Kw generator setup it was no longer a worry. I do intend to install these capacitors on this rig one day. Just have not been in a hurry or concerned enough to look into it yet. But yes, they do make a difference!
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2019 Ram 3500 Limited w/ Max Tow pkg
2005 Cardinal 33LX
2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3) SOLD!
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03-29-2015, 03:05 PM
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#3
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Senior Member
Join Date: Dec 2011
Location: Helena, MT
Posts: 606
Montana
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It is a piece of cake. Google "SUPCO SPP6 hard start capacitor". Also read here for a write up of this mod.
I have done this with our AC unit. I do think it helps with the initial current demand to kick on the compressor; however, a marginal generator for the AC unit will still be a marginal unit for the AC with a hard start cap. That write up I linked to makes it seem like it cures the "not enough generator" issue, but I would say it really just masks it. Our Yamaha 2400 gen can run the AC at lower elevations and/or cooler ambient temps. But when we have tried it when it is really hot and/or high elevations it won't run it reliably.
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2012 Aspen Trail 2710BH | 470 watts of solar on the roof | 2x6V GC batteries | 1500 watt PSW inverter | Micro Air on A/C | so far strictly boondocking
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05-22-2015, 12:43 AM
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#4
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Senior Member
Join Date: Nov 2012
Location: Las Vegas
Posts: 600
Nevada
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Today I installed Hard Start Caps on all three of my units. prior to installing them I could not run zone 1 & 3 at the same time without transfer switch sheading circuits for A/C's and Water heater. The LRC(locked rotor current) was to high for the switch. Now they start with ease.
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2017 Dodge Ram 3500 DRW
2014 Voltage 3200
2005 FLHTCI
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06-01-2015, 05:12 AM
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#5
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Senior Member
Join Date: Sep 2014
Location: Callaway
Posts: 864
Maryland
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Quote:
Originally Posted by eightydo
Today I installed Hard Start Caps on all three of my units. prior to installing them I could not run zone 1 & 3 at the same time without transfer switch sheading circuits for A/C's and Water heater. The LRC(locked rotor current) was to high for the switch. Now they start with ease.
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By chance, what were the part numbers? And how loans did it take?
Cale
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TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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06-01-2015, 08:10 AM
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#6
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Senior Member
Join Date: Aug 2013
Location: Memphis
Posts: 1,616
Michigan
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Cale - Suppco SPP6. They don't take long at all. I'd say 10-15 minutes per AC unit including removing and reinstalling the cover.
__________________
2019 Ram 3500 Limited w/ Max Tow pkg
2005 Cardinal 33LX
2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3) SOLD!
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06-01-2015, 05:31 PM
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#7
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Senior Member
Join Date: Sep 2014
Location: Callaway
Posts: 864
Maryland
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Quote:
Originally Posted by donzinger
Cale - Suppco SPP6. They don't take long at all. I'd say 10-15 minutes per AC unit including removing and reinstalling the cover.
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Thanks a bunch. Going to put these on before we start our trek back east...it will be much hotter as we are traveling than we are use to around here.
Cale
__________________
TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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06-01-2015, 05:48 PM
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#8
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Senior Member
Join Date: Sep 2014
Location: Callaway
Posts: 864
Maryland
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Quote:
Originally Posted by donzinger
Cale - Suppco SPP6. They don't take long at all. I'd say 10-15 minutes per AC unit including removing and reinstalling the cover.
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Just ordered three from Amazon. Quick questions before I receive...
Do we have a start and run capacitor?
If so, we "piggy back" or replace the Start capacitor?
Thanks,
Cale
__________________
TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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06-01-2015, 09:06 PM
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#9
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Senior Member
Join Date: Nov 2013
Location: Quartzsite
Posts: 682
Arizona
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I am interested in the answer here. Also, when you ordered on Amazon. Was Prime offered. I am going to be getting on the road within a week and have waited until the last minute to get a couple things finished.
I might just order and hope they get here. I hate to think about going up on the roof right now with 100 degree temperature every day.
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2013 Voltage 3905
2013 F350 4x4 DRW
2013 RZR XP 900
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06-01-2015, 09:17 PM
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#10
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Senior Member
Join Date: Sep 2014
Location: Callaway
Posts: 864
Maryland
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Quote:
Originally Posted by arlan in arizona
I am interested in the answer here. Also, when you ordered on Amazon. Was Prime offered. I am going to be getting on the road within a week and have waited until the last minute to get a couple things finished.
I might just order and hope they get here. I hate to think about going up on the roof right now with 100 degree temperature every day.
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I searched "SPP6" on Amazon, then check marked Prime...select other sellers, then check mark Prime.... Here is the link to the one I got,
Part No. SPP6 Series PTC Capacitor Combination, Operating Voltage (VAC) 90 - ...: Hard Start Capacitor: Amazon.com: Industrial & Scientific
The Amazon price is a little more, but worth the two day shipping.
Cale
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TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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06-01-2015, 09:20 PM
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#11
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Senior Member
Join Date: Nov 2013
Location: Quartzsite
Posts: 682
Arizona
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Thanks.
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2013 Voltage 3905
2013 F350 4x4 DRW
2013 RZR XP 900
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06-01-2015, 10:07 PM
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#12
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Senior Member
Join Date: Nov 2013
Location: Quartzsite
Posts: 682
Arizona
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I haven't researched this yet. But how do you know what fits what?
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2013 Voltage 3905
2013 F350 4x4 DRW
2013 RZR XP 900
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06-01-2015, 10:33 PM
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#13
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Senior Member
Join Date: Dec 2011
Location: Helena, MT
Posts: 606
Montana
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RV Air Conditioner Hard Start Capacitor | ModMyRV
There is a write up on the procedure. The SPP6 is the correct capacitor size, the physical dimensions are not critical. It is mounted by screwing it to the AC housing and then attaching the wires. That write up says the SPP6E is the appropriate cap; however, when I asked SUPCO support which was correct the reply was that the SPP6 was the more appropriate cap.
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2012 Aspen Trail 2710BH | 470 watts of solar on the roof | 2x6V GC batteries | 1500 watt PSW inverter | Micro Air on A/C | so far strictly boondocking
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06-01-2015, 11:25 PM
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#14
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Senior Member
Join Date: Nov 2013
Location: Quartzsite
Posts: 682
Arizona
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Thanks. I have been cooling my trailer for the last month or more. All three AC's have been running fine. I think I will not mess with what is not broken at the moment.
The units generator runs two of the AC's just fine and I have 50 amp at the house. Some campground only have 30 amp and I will have to do with one AC in those places. Better yet, be someplace that AC is not needed.
Perhaps next winter I will attempt the project.
__________________
2013 Voltage 3905
2013 F350 4x4 DRW
2013 RZR XP 900
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06-01-2015, 11:44 PM
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#15
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Senior Member
Join Date: Aug 2013
Location: Memphis
Posts: 1,616
Michigan
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Cale - when I did mine in my last 5th wheel, I replaced not piggy backed. This is on my short list to do to this one before the August NASCAR Race.
__________________
2019 Ram 3500 Limited w/ Max Tow pkg
2005 Cardinal 33LX
2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3) SOLD!
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06-02-2015, 01:36 AM
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#16
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Senior Member
Join Date: Nov 2012
Location: Las Vegas
Posts: 600
Nevada
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When I installed mine I piggy backed. Works like a charm. Start up AMP draw went down. Now I can run all three A/Cs with generator.
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2017 Dodge Ram 3500 DRW
2014 Voltage 3200
2005 FLHTCI
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06-02-2015, 01:57 AM
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#17
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Senior Member
Join Date: Nov 2013
Location: Quartzsite
Posts: 682
Arizona
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Quote:
Originally Posted by eightydo
When I installed mine I piggy backed. Works like a charm. Start up AMP draw went down. Now I can run all three A/Cs with generator.
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That sounds great but I am confused. Still don't know what to buy and what to you mean "piggy back". Did you install two of them on each unit.
__________________
2013 Voltage 3905
2013 F350 4x4 DRW
2013 RZR XP 900
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06-02-2015, 04:55 AM
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#18
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Senior Member
Join Date: Sep 2014
Location: Callaway
Posts: 864
Maryland
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Quote:
Originally Posted by arlan in arizona
That sounds great but I am confused. Still don't know what to buy and what to you mean "piggy back". Did you install two of them on each unit.
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Piggy back meaning that it is parallel to the start capacitor. The capacitance is added to the already installed capacitor. Having a higher start capacitor, should allow the the compressor to get up to operating speed much quicker, by quickly discharging its stored charge...
The link I provided earlier from Amazon would be the right capacitor for the start capacitor.
Cale
__________________
TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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06-03-2015, 10:15 AM
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#19
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Senior Member
Join Date: Aug 2013
Location: Memphis
Posts: 1,616
Michigan
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I like this idea - I may look into the piggyback when I install them on this unit. I didn't pigyyback on my last 5th wheel as I only had the one AC unit, not the three I have now.
__________________
2019 Ram 3500 Limited w/ Max Tow pkg
2005 Cardinal 33LX
2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3) SOLD!
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06-06-2015, 02:28 AM
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#20
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Senior Member
Join Date: Sep 2014
Location: Callaway
Posts: 864
Maryland
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I installed the capacitors on all three AC unit...it took longer to take pictures than it did installing them....I fired the generator up and fired off all three units and worked like a charm. It use to spike up near 70 amp on the inside LED power panel...it never spiked above 45 and with all three units running, it was at 37 amps. If people want pics, I can post them later when I get to my computer.
Cale
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TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around
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