How To Wire An Advent Air AC System To A Two-Wire Furnace

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Question:

I recently bought the Advent Air RV Air Conditioner System - Single Zone - 13,500 Btu - White to replace my 10 year old Dometic penguin AC. The Dometic had 3 wires going to the thermostat and 2 wires going to the furnace. The Advent needs 4 wires going to the thermostat and one wire going to the furnace. My Suburban furnace has two blue low voltage wires that connected to the two wires from the Dometic AC. I am not sure how to wire these low voltage wires. I thought it would be compatible. I should be able to run an additional wire between the furnace and the thermostat to make it 4 wires to the thermostat, but then I am not sure how to hook up the AC to the thermostat using 1 wire. Any help would be appreciated.

asked by: Michael S

0

Expert Reply:

Typically if there are two wires running from the furnace to the AC system then it means that the furnace has power already connected to it and it sends that through one of the wires up to the AC until the system calls for heat, at which point the relay will close and send power back to the furnace through the other wire. You'll want to connect the brown and white furnace wire from the controller # ACRG15 to the other wire send power back to the furnace.

To determine which wire is which you can use a multimeter # PT89ZR and place one lead to a good ground and the positive lead to either wire. One wire should read 12v DC and would be the power running from the furnace to the AC. You'll connect the AC wire to the other furnace wire so it can send power to furnace to activate it as needed. The power wire can just be capped off with some electrical tape.

expert reply by: Kevin C

0

John L.

6/4/2024

I bought the acm150lp unit it said it was compatible with any old unit my old unit don’t have a plug on it so I’m unsure of the wiring on the new unit

Reply

Kevin C.

6/4/2024

@JohnL If your old system was hardwired and doesn't have a 6 or 9-pin connector then you would need to replace the air distribution box as well in order to plug in the # ASA86YR (ACM150LP). For this unit there's a manual option # ACDB with the controls on the air distribution box or an option with a wall-mounted thermostat # ACRG15.

Helpful Links

tv-review-advent-air-ceiling-vent-assembly-acdb.aspx

tv-review-advent-air-low-profile-rv-air-conditioner-with-start-capacitor-asa99yr.aspx

tv-review-advent-air-rv-air-conditioner-vent-thermostat-assembly-acrg15_1.aspx

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Frank R.

6/8/2024

I bought an advent 13500btu to replace my dometic ac with the advent control box and thermostat getting e5 on thermostat any help would be appreciated 3

Reply

Kevin C.

6/8/2024

@FrankR An E5 error code simply means there's a communication error between the relay box # PXXACRG12RB and the thermostat. If you're hooking it directly to the relay box without any extra wire and it's wired correctly and you're still getting the E5 error then either the relay box or thermostat is defective and needs to be replaced. Just to make sure you have it wired correctly I've listed the wire colors from the relay box and their connections on the thermostat below: Blue: A Purple: B Green: COM Red/White: 12v

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Frank

6/8/2024

@KevinC where do I hook The heater wire too I have a thin white and thin red that was in old box which one goes to the heater wire thanks

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Kevin C.

6/10/2024

@Frank The # PXXACRG12RB has a brown/white wire that will need to run to the furnace. For the trailer wiring you would need to put 12v power to either line and see which one sends power to furnace to turn on or if you still have remember which wire from the old unit went to whichever wire and can look up the old system's wiring diagram to see which wire is for power.

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Answer 1

Advent Air Conditioners like part #ACM135 come with a connector that pairs up directly with the standard 6-wire connector. If you have a 9-wire connector then you need the kit #ACRG15 as well. For wiring I'm attaching some photos of diagrams for…

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Answer 2

Hey Darin, the #ACM135 is an updated version of the AC135 that you have currently but it would not work with the lower vent assembly you have now. You'd instead want the part #ADV23SR which comes with the correct lower vent assembly like…

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Answer 3

I called and spoke to the technician at Lippert about the gear packs. If the arms that attach to your slide out are 2 x 2 you will need Gear Pack part #LC281331. If the arms that attach to the slide out at 2.5 x 2.5 you can certainly use Gear Pack…

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Answer 4

Hey Paul, so the best option for you will be the Furrion Chill HE part #FR42PV as this covers everything you are looking for. It's the quietest and coldest blowing unit that also comes with an install kit designed to replace Dometic units like…

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Answer 5

Advent has air distribution boxes for their kits like the #ACM135 like with the part #ACRG15 or #ACDB but the #AT15021 can only be used with an Atwood unit.

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Answer 6

When it comes to roof top air conditioners, the air distribution boxes that are compatible with them are going to be fairly specific. The Advent #ACM135 is compatible with only 2 specific air distribution boxes: the Air Distribution Box and…

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Answer 7

To replace the Dometic AC unit currently on your 2017 Forest River Blue Ridge 5th wheel trailer, you're going to want the Furrion Chill Replacement RV Air Conditioner item #FR42PV. This rooftop unit will replace just the rooftop unit of the…

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Answer 8

Thanks for reaching out, Mike. The Advent Air RV Air Conditioner #ACM135 will indeed replace your Dometic model 630035.321. The Advent units are made to be directly compatible with the Dometic Duo Therm AC units, so your ceiling register and 5 button…

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Answer 9

If you have the ACTH12 then you should also have the Air Distribution Box #ACRG15 which will have a control box for your wiring from the rooftop unit #ACM135 and the thermostat. This air distribution box and thermostat will wire up exactly the same…

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Answer 10

Hey Matt, we have what you need but the part #ACM150 only comes with the top portion of the system so it would not be correct. You'd instead want the part #ADV32SR if you have a ductless system or the part #ADV92SR if you have a ducted system and…

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Answer 11

In order to replace your Carrier Air V RV Air Conditioner I highly recommend using the Advent Air Replacement RV Air Conditioner for Carrier Setup part #ACCAR135 for 13,500 Btu's or part #ACCAR150 for 15,000 Btu's. This unit will be the only…

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Answer 12

The thermostat is not included. The unit includes an adapter that would allow you to continue using your existing Carrier air distribution box and thermostat. If you need the air distribution box and wall mounted thermostat, it's available…

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How To Wire An Advent Air AC System To A Two-Wire Furnace

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