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Parallel kit for eu7000 with eu3000


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  #1  
Old 03-01-2019, 01:09:17 PM
Pepito113 Pepito113 is offline
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Default Parallel kit for eu7000 with eu3000

Hello everyone. Been doing a lot of reading in this site but my first time posting. I currently have a eu3000. I was interested in purchasing a eu7000. I saw some post on here and on YouTube of a guy running a pig tail from the eu3000 to the eu7000 and parallel together. Weird as one is in 120 and other is 240. I believe a eu7000 wonít start my central AC. So was wondering if the eu7000 parallel kit can hook a eu7000 and eu3000 Together and use both like the video pigtail. The kit I was looking into was 08E93-Z37-001AH. The reason for the kit was to get 50amp service to my house. Not sure if possible. But the video does show him getting extra power from the e3000 to boost his eu7000. Thanks for all the help.
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Old 03-01-2019, 04:34:19 PM
Pepito113 Pepito113 is offline
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Default Re: Parallel kit for eu7000 with eu3000

Here is the video I was talking about. So I want to do something similar. I want to use the parallel kit and not use the double male plug he used in the video. Do you think it would work similar? Anyone have a similar set up?

https://youtu.be/7xqkoYVbGck
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Old 03-01-2019, 07:34:58 PM
AlexV AlexV is offline
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Default Re: Parallel kit for eu7000 with eu3000

I've seen the video. If it were me I wouldn't do it. Honda doesn't recommend it either. It states in their Parallel kit NOT to Parallel two different size generators. Paralleling a 240v generator with a 120v generator doesn't sound like a good idea to me. You have other options. There are other videos and posts here on Hard Start kits. I have two 3.5 ton central A/C's I put a 5-2-1 "Compressor Saver" Hard Start Kit on both. It made a big difference. How many ton's is your central A\C?
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Old 03-01-2019, 08:01:06 PM
Pepito113 Pepito113 is offline
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Default Re: Parallel kit for eu7000 with eu3000

I have a 4 ton AC unit. I am looking into a 5 2 1 Hardstart kit. I just donít want to spend all that money for the U 7000 and not have it start my central AC At this time I canít afford two of the EU 7000
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Old 03-01-2019, 08:22:07 PM
AlexV AlexV is offline
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Default Re: Parallel kit for eu7000 with eu3000

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Originally Posted by Pepito113 View Post
I have a 4 ton AC unit. I am looking into a 5 2 1 Hardstart kit. I just donít want to spend all that money for the U 7000 and not have it start my central AC At this time I canít afford two of the EU 7000
Here's one of his videos with a 4 ton A/C. https://www.youtube.com/watch?v=a2ASAWGwrjc.
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Old 03-02-2019, 10:09:36 AM
Pepito113 Pepito113 is offline
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Default Re: Parallel kit for eu7000 with eu3000

Ok. Hopefully the hard start kit will help. What would be the next option if with the hardstart and the eu7000 canít start the ac? Thanks for your help.
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Old 03-02-2019, 12:50:27 PM
AlexV AlexV is offline
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Default Re: Parallel kit for eu7000 with eu3000

If I lived closer to you I'd bring one of mine by to see if it started it. Maybe if you have a rent a center near by rent one and give it a try. After seeing his video I would bet it would work. Central A/C's draw A LOT of power on startup. At our house in Florida we have a Kohler 30KW. When my 5 ton central AC would start the lights would dim big time. After I put a 5 2 1 kit on it made a big difference. We get a very quick flash now at startup. Before I found out about the 5 2 1 kit I bought a small cheep window A/C for my bedroom in case we lost power in the summer. I never had to use it.
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Old 03-03-2019, 12:21:46 AM
billinjax billinjax is offline
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Default Re: Parallel kit for eu7000 with eu3000

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Originally Posted by Pepito113 View Post
Ok. Hopefully the hard start kit will help. What would be the next option if with the hardstart and the eu7000 canít start the ac? Thanks for your help.
The next option would be a soft start kit like the one from Micro-Air. What is the LRA rating for your condenser unit? IIRC, Micro-Air will reduce it by 75%.

Do you have a heat pump or just an air conditioner? Mine is 3.5 ton and my locked rotor amps is 117 A. I only ask because I've seen the LRA be higher on the heat pumps for whatever reason. I could never accurately measure my LRA and learned it takes fairly expensive equipment to do so accurately. My hard start kit reduced the duration of the startup surge but the amperage was still too high for the reduced duration. It did not work and that was a hard start capacitor and the separate potential relay. IIRC, it was still ~100A.

Although a single EU7000 sounds like it's being abused a bit (WOT), it starts the condenser unit (fan and compressor with soft start kit) and my air handler, although the air handler has a variable speed fan motor. Since I could not run any other circuits, I ended up with a second EU7000.

I agree with Alex on avoiding trying to parallel a split phase 240V generator with a single phase 120V. Even if it works, your HVAC system is going to need both legs and one leg would always come up short.
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Old 03-03-2019, 01:12:40 PM
Drangd1 Drangd1 is offline
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Default Re: Parallel kit for eu7000 with eu3000

Just another reason to take the UTUBE geniuses with a pound of salt.

I would never parallel different sized generators. End, carriage return

Using LRA may be low for your application. Starting current is usually 6 times running load amps. This is for cycles not seconds. The other thing to consider is how fast will your genny go from zero amps to full tilt? That is really hard on them. In this situation I would guess that the equipment you mention would be a dead heat. Distance from the genny WILL be a factor. Voltage drop come to play.

The hard start kit would be a good idea. Not all that expensive. A VFD/soft start MIGHT be a idea provided that the compressor can handle it. My experience not all electric motors can handle a VFD/soft start. Time would be a consideration with these, if your ramp up is less than a second the VFD/soft start may not be the right choice. If longer than a second, we are back to can the compressor take it?
A soft start is less expensive and since you need 100% when running it might be a better solution. Single phase is more available now. Lastly where do you mount the VFD/soft start? Outside in Arizona can have issues. The first VFD I ever connected was temp rated for 40C/104F. We had to buy an air conditioner for it. This equipment does not like a hot environment. Usually you mount the electronics as close to the motor as you can. Distance can be a problem with some of them. Lastly do you have any sensitive electronics nearby. This equipment has line filters but there will still be some harmonic content put back on the wiring during starting.
I have been away from the industry for 4 years now that I am retired. Might be better than I am indicating.
Research as best you can.
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Old 03-03-2019, 06:20:39 PM
billinjax billinjax is offline
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Default Re: Parallel kit for eu7000 with eu3000

Before my current heat pump's life is over, I hope to find more data on inverter based heat pump condenser units. I don't know if there's any drawback in the warmer climates. But, they certainly would be more generator friendly based on my experience with the mini-split inverter systems.
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Old 03-05-2019, 11:43:24 AM
AlexV AlexV is offline
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Default Re: Parallel kit for eu7000 with eu3000

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Originally Posted by billinjax View Post
Before my current heat pump's life is over, I hope to find more data on inverter based heat pump condenser units. I don't know if there's any drawback in the warmer climates. But, they certainly would be more generator friendly based on my experience with the mini-split inverter systems.
Bill I was surprised my house in Cape Coral wasn't built with a heat pump. I asked the builder who said it has heat strips only. It has 3 of them. If the system needs all three its 15KW to run the heat.
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Old 03-05-2019, 11:57:35 AM
billinjax billinjax is offline
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Default Re: Parallel kit for eu7000 with eu3000

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Originally Posted by AlexV View Post
Bill I was surprised my house in Cape Coral wasn't built with a heat pump. I asked the builder who said it has heat strips only. It has 3 of them. If the system needs all three its 15KW to run the heat.
Interesting. North Florida is quite a bit colder for a few months of the year compared to South Florida. Looks like you have a good +15F on us with average lows in the mid 50s.

I can't say I ever really figured out what it costs to run the heat strips for an hour looking at utility rates. The heat pump uses about 3,500W and my strips are 8kW. The strips do heat much faster than the heat pump. I wonder if it really makes a difference you can actually notice in your utility bill considering it's not running non-stop.
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