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Open Roads Forum  >  Truck Campers

 > Honda generator and A/C

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polarbare21

Somewhere between Mexico and Canada

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Joined: 10/10/2003

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Posted: 05/06/12 07:50pm Link  |  Print  |  Notify Moderator

So the problem is the inrush of starting amp draw from 3 motors starting all at once.

Youre starting the compressor, the evaporator fan motor (blower), and the condenser fan motor (fan outside on the unit)

This may fix the problem if your generator drops out when you first start the A/C unit.

If you were to purchase a time delay contact relay you could simply wire it in series with both the fan motors and delay each their start times.

1st. Measure the starting amps on the compressor.
Time how long the amps are peaked, lets just use 5 seconds for the compressor for now.

2nd. Set the time delay relay for the condenser fan and evaporator blower to start at 7 seconds.

If this drops the starting amps by 20% - 25% it may be enough to not kick out the generator.

The relays can be bought at most electrical supply houses and Graingers.

If you wanted to try this you would want to buy a 0-30 second adjustable or 0-60 second adjustable timer, with 120 volt coil voltage, and 2 normally open contacts.

If you have a 3000 watt Genny.... then disregard....

JumboJet

Tontitown Arkansas

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Posted: 05/07/12 06:32am Link  |  Print  |  Notify Moderator

polarbare21 wrote:

So the problem is the inrush of starting amp draw from 3 motors starting all at once.


All the rooftop air conditioners I have seen only have two motors.

The blower motor has a double shaft and turns both condenser and evaporator fans.

A/C Exploded Parts View

polarbare21

Somewhere between Mexico and Canada

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Posted: 05/07/12 06:52am Link  |  Print  |  Notify Moderator

JumboJet wrote:

polarbare21 wrote:

So the problem is the inrush of starting amp draw from 3 motors starting all at once.


All the rooftop air conditioners I have seen only have two motors.

The blower motor has a double shaft and turns both condenser and evaporator fans.

You are correct Sir.
I am used to units much larger than the RV style rooftop A/C.

So now this just became a bit easier to do.

But may not get the reduction in amps I was shooting for.

A/C Exploded Parts View


hunterj

Miami, Fl.

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Joined: 08/14/2003

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Posted: 05/07/12 10:34pm Link  |  Print  |  Notify Moderator

Snow River TC wrote:

problem is that even if nothing else is running your convertor is and that draws a lot of power. i actually put a switch on mine so the battery would not charge when thrown. I had to do that as my microwave only just barely runs off my Honda 2000.


Paul,

I am wanting to put a switch on my converter also. Could you post some instructions on how you did yours? Northwood said just pull the fuses but they are a pain to get to in my AF1150.

Thanks,
Jim


04 Dodge 3500 DRW 4x4
05 Arctic Fox 1150

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