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03-30-2021, 09:13 PM
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#21
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Site Team
Brand: Entegra
Model: Accolade 37TS
State: South Dakota
Posts: 8,778
THOR #1469
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Quote:
Originally Posted by Fullabunk
As mentioned, I will replace the ATS with a 50A one. Yesterday, while looking at the wiring location and solidifying my plan I saw something I couldn't readily recognize. The output of my ATS goes to a 4" square metal box. I failed to take a picture but when removed the top I saw come connectors labeled L1 and L2 as well as others I don't remember.
What is this and what does it do?
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Is that your converter?
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03-30-2021, 09:23 PM
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#22
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,379
THOR #7035
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Quote:
Originally Posted by Fullabunk
As mentioned, I will replace the ATS with a 50A one. Yesterday, while looking at the wiring location and solidifying my plan I saw something I couldn't readily recognize. The output of my ATS goes to a 4" square metal box. I failed to take a picture but when removed the top I saw come connectors labeled L1 and L2 as well as others I don't remember.
What is this and what does it do?
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__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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03-30-2021, 09:40 PM
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#23
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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No, the converter is mounted under the distribution panel and has been disconnected for 4 months. The output of the ATC feeds this component with 6G wire. I will be at the MH tomorrow and will get a picture.
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03-30-2021, 09:41 PM
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#24
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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Could it be some kind of EMS?
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03-30-2021, 09:43 PM
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#25
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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Or a second ATS?
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03-30-2021, 10:41 PM
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#26
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Senior Member
Brand: Thor Motor Coach
Model: Fourwinds 24F
State: North Carolina
Posts: 775
THOR #9511
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Upgrade 30 to 50 Amp service
It might be your latching disconnect.
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03-30-2021, 11:16 PM
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#27
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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What is a latching disconnect?
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03-30-2021, 11:39 PM
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#28
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Senior Member
Brand: Thor Motor Coach
Model: Fourwinds 24F
State: North Carolina
Posts: 775
THOR #9511
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It is a relay that connects/disconnects the coach battery from the coach. It is activated by the USE/STORE switch. Here is a link of a representative latching disconnect. https://www.rvtechlibrary.com/electr...disconnect.pdf
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03-30-2021, 11:40 PM
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#29
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,379
THOR #7035
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Quote:
Originally Posted by jimbo12
It might be your latching disconnect.
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Quote:
Originally Posted by Fullabunk
What is a latching disconnect?
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The battery disconnect - N/A since you said this mystery box is connected to your 120 VAC side.
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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03-30-2021, 11:49 PM
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#30
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Senior Member
Brand: Thor Motor Coach
Model: Fourwinds 24F
State: North Carolina
Posts: 775
THOR #9511
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Oh, I missed it is on the 120 side. Do you have a residential fridge? It might be some switching mechanism to switch the fridge whether you are on shore power of inverter.
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03-30-2021, 11:52 PM
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#31
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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My fridg is DC and propane. This is AC do not a DC disconnect
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03-30-2021, 11:55 PM
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#32
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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This is in a 4” metal box wired AC between ATC and 120v power panel
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03-30-2021, 11:59 PM
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#33
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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Tomorrow I will be at the unit and get not only a picture but check other inputs or outputs for clues
A guess: possible a second ATC with inputs from main ATC and AC output of inverter. Maybe the output would be to the AC power panel. I will check that out and report back.
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03-31-2021, 12:11 AM
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#34
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Senior Member
Brand: Still Looking
State: Texas
Posts: 6,187
THOR #2121
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Quote:
Originally Posted by Fullabunk
As mentioned, I will replace the ATS with a 50A one. Yesterday, while looking at the wiring location and solidifying my plan I saw something I couldn't readily recognize. The output of my ATS goes to a 4" square metal box. I failed to take a picture but when removed the top I saw come connectors labeled L1 and L2 as well as others I don't remember.
What is this and what does it do?
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Only an educated “GUESS” on my part.
If it’s on the 120V side, it may be what automatically sheds electrical load since your motorhome was built with 2 air conditioners on a 30-Amp service. If you have both A/Cs running and then turn on microwave, for example, something has to turn off one of A/Cs. Just guessing though.
Thor wiring diagram should show what that box is or does.
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03-31-2021, 12:22 AM
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#35
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Senior Member
Brand: Thor Motor Coach
Model: Fourwinds 24F
State: North Carolina
Posts: 775
THOR #9511
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My guess is it is another transfer switch. The main ATS switches between shore power and genset and when it supplies the main power for the coach the inverter output is disconnected. When shore power and genset power is disconnected the second transfer switch, the 4 inch metal box, goes into a state that connects the inverter as the main power source. Three 120VAC power sources would require two transfer switches.
I’m willing to bet the two inputs to the box are the ATS and inverter and the output goes to the power center.
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03-31-2021, 12:49 AM
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#36
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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Jimbo12, I tend to agree with you. I will let you know tomorrow. The interesting nay argument is that the unit was not sold with an inverter. I installed it. Maybe Thor was anticipating the owner would want an inverter but they were to cheap to install one themself.
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03-31-2021, 07:53 PM
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#37
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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For the first time I am trying to include a picture
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03-31-2021, 07:56 PM
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#38
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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2nd try
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03-31-2021, 07:59 PM
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#39
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Member
Brand: Thor Motor Coach
Model: 2020 4 Winds 31Y
State: Texas
Posts: 80
THOR #20784
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This is not a ATS, but appears to be some kind of relay. As said earlier one input is output of Gen/shore power ATS and the other involves the Inverter AC voltage. Some how the AC power distribution panel is involved. I don’t see a part or model number listed.
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03-31-2021, 08:09 PM
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#40
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Site Team
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 14,379
THOR #7035
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That's a Power Control System to allow you to run your 2 A/Cs:
http://www.precisioncircuitsinc.com/...ing-5-8-12.pdf
__________________
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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