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 > Slow start system for air conditioner

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ktmrfs

Portland, Oregon

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Posted: 04/25/22 08:08pm Link  |  Quote  |  Print  |  Notify Moderator

theoldwizard1 wrote:

time2roll wrote:

The $20 kits are generally an additional start capacitor. These work great on the older models that had none. Most of the newer models already have this feature and the kit would have limited effect.

Without getting into the electrical engineering of AC motors, a larger or an additional starting capacitor could making starting current draw worse !

EasyStart by Micro-Air is a highly recommended soft starter.


x2 on the micro air. with a honda 2200 I can start and run my Coleman MachIII at 7500 ft altitude at 90+F in eco mode and run it all day no problem. It's not inexpensive but it is way better than a soft start cap which only reduces somewhat the inrush surge and LRA. With the micro air my PEAK inrush current is <20A for <200 MILLI seconds. well within the capability of the honda 2200.

Now the honda 2000 will run out of poop at about 4000ft density altitude and overload, not a big enough motor. the 2200 has a much larger motor in addition to the extra 200W.

With the honda 2200 and easy start and some roof/portable solar I no longer have any need for the honda parallel kit and two generators.


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philh

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Posted: 04/28/22 06:37pm Link  |  Quote  |  Print  |  Notify Moderator

ktmrfs wrote:

With the honda 2200 and easy start and some roof/portable solar I no longer have any need for the honda parallel kit and two generators.

I have a 2500w westinghouse, and I believe it has a smaller motor than your 2200. It would not run my 15k Btu AC on the travel trailer until I installed the microaire product.

On my new 5th wheel, it will start and run the smaller front AC without any mods. I haven't tried it on the rear AC yet.

Microlite Mike

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Posted: 05/04/22 10:39am Link  |  Quote  |  Print  |  Notify Moderator

Another often unmentioned benefit of the MicroAir soft start is how it "softens" the noise of A/C startup. Rather than the "Ka-whump" of fan and compressor starting all at once, which can wake you in the middle of the night, it's now a softer startup that I only notice if I'm awake at the time.

This is a benefit even if on shore power.


"Knowledge is realizing that the street is one-way, wisdom is looking both directions anyway."


~ Albert Einstein

RLS7201

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Posted: 05/04/22 12:49pm Link  |  Quote  |  Print  |  Notify Moderator

theoldwizard1 wrote:

time2roll wrote:

The $20 kits are generally an additional start capacitor. These work great on the older models that had none. Most of the newer models already have this feature and the kit would have limited effect.

Without getting into the electrical engineering of AC motors, a larger or an additional starting capacitor could making starting current draw worse !

EasyStart by Micro-Air is a highly recommended soft starter.


Please, if you would, get into electrical engineering and explain to us how additional capacitance will raise AC motor starting current line draw.

Richard


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Microlite Mike

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Posted: 05/04/22 02:59pm Link  |  Quote  |  Print  |  Notify Moderator

RLS7201 wrote:

theoldwizard1 wrote:

time2roll wrote:

The $20 kits are generally an additional start capacitor. These work great on the older models that had none. Most of the newer models already have this feature and the kit would have limited effect.

Without getting into the electrical engineering of AC motors, a larger or an additional starting capacitor could making starting current draw worse !

EasyStart by Micro-Air is a highly recommended soft starter.


Please, if you would, get into electrical engineering and explain to us how additional capacitance will raise AC motor starting current line draw.



Richard


Let's start with the inrush current that goes to charging the capacitor before it delivers the "boost" to the starting windings.

There's also a Youtube video or two actually showing the extra current needed.

Here's another analysisHard start Capacitor vs Soft Start

Also some more information on what a hard start actually does:

Start Capacitors and Inrush, fact and fiction

A hard start capacitor does not reduce inrush or starting current, it just shortens the amount of time the motor remains in "locked Rotor Amperage" speed. Also note in the linked info how most ammeters are not reading the actual starting current but rather the current ~100 ms after startup begins.

* This post was edited 05/04/22 03:39pm by Microlite Mike *

Sophia11

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Posted: 05/25/22 04:54pm Link  |  Quote  |  Print  |  Notify Moderator

I have use Yamahas generators its far better than Honda

Bobbo

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Posted: 05/26/22 08:25am Link  |  Quote  |  Print  |  Notify Moderator

Sophia11 wrote:

I have use Yamahas generators its far better than Honda

Is there an extended run tank for the Yamaha like there is for the Honda?


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Sophia11

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Posted: 05/31/22 04:52am Link  |  Quote  |  Print  |  Notify Moderator

Bobbo wrote:


Is there an extended run tank for the Yamaha like there is for the Honda?

Yes, there is an extended run tank for the Yamaha. The Yamaha extended run tank has a capacity of about 35.4 gallons. The tank has a threaded locking cap, which makes it easy to install or remove the tank for refilling.

Bobbo

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Posted: 05/31/22 07:36am Link  |  Quote  |  Print  |  Notify Moderator

Sophia11 wrote:

Bobbo wrote:


Is there an extended run tank for the Yamaha like there is for the Honda?

Yes, there is an extended run tank for the Yamaha. The Yamaha extended run tank has a capacity of about 35.4 gallons. The tank has a threaded locking cap, which makes it easy to install or remove the tank for refilling.

35.4 gallons????? That must be hard to carry around! I am happy with my 3 gallon tank for my Honda.

valhalla360

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Posted: 05/31/22 08:09am Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

2oldman wrote:

That one generator will be working hard and LOUD running it, and you'll have a heck of a time running anything else, including your converter.


^^This...just not the right tool for the job. If you want to run the air, and other things, better to add/connect second generator, or sell/trade the 2200 and purchase a more capable single.

Jerry


Even if it can run it...so much for it being a quiet generator.

When you see the dB ratings, it's almost always at 25% load, so slightly above idle. A little 2000-2200w generator is running at somewhere around 80-100% of the continuous load rating powering the air/con and even the name brand honda/yamaha units start to sound like a lawnmower.

On the other hand, with a 3000-4000w unit, it's running around 30-50% load and much closer to the dB rating you see in the advertising.

We just replaced a Yamaha 2400 with a Champion 4500. The new generator is substantially quieter with the air/con running (even though the advertised dB ratings are worse) because it barely comes off idle. Yes, it's a little heavier but not drastically.


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