Headhunter
RVF Supporter
- Joined
- Jul 18, 2021
- Messages
- 539
- Location
- Northeast PA
- RV Year
- 2021
- RV Make
- Tiffin
- RV Model
- Red 33 AA
- RV Length
- 35 ft
- TOW/TOAD
- 2017 Jeep Sahara
- Fulltimer
- No
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I ran the coach on 30 amp when we were out west,, but it was for heat not AC. I have twp propane furnaces so it was fine. So I shut off the rear AC and let the front one run overnight. But first I brought down the temperature running both ACs with my generator for a couple of hrs.Nice Rig! How was the Harvest Host? On 30 amps my rig won't run both ACs either.
Ok I never heard of this before. What is involved in installing easy start to your AC units? How much does it cost?If you find yourself in a position of frequent 30amps like I do, then adding a easy start to the air units will let you run 2 on 30amp.
careful ! soft starts are just that, designed to control the inrush current needed to start the air conditioner. They will not reduce the required power needed by the air conditioners to actually run.That said, consider Furrions Chill Cube 18K, you can run 2 of these units on a 30 amp service right out of the box.If you find yourself in a position of frequent 30amps like I do, then adding a easy start to the air units will let you run 2 on 30amp.
Careful….Newmar is not compatible with Furion.careful ! soft starts are just that, designed to control the inrush current needed to start the air conditioner. They will not reduce the required power needed by the air conditioners to actually run.That said, consider Furrions Chill Cube 18K, you can run 2 of these units on a 30 amp service right out of the box.
Careful….Newmar is not compatible with Furion. Please help me understand, Newmar is the company that makes coach? and do they use some other kind of roof top air conditioners then all the other RV manufacturers? Sorry i know nothing about these coaches or motor homes, i assumed they used a standard roof top air conditioner mounting over a 14x14 cutout.
I personally love the furion, but that won’t help the OP. Again, please help out here, " OP ? "
And soft starter does resolve the issue as the in rush is the problem.
I only need 11amps to run a single 15k air unit or 33 to run all 3... 33 amps at 120volts is 3,960 watts, that's not going to work on a 30 amp circuit, and if the voltage is under 120 volts, then is going to fail even faster as Ohms Law tells us the lower the voltage the higher the Amperage.
This is down from the 21 starting and 18 running that I had before. The run would eventually lower itself to 14-15amps but never 11 as it does with soft starter.11 amps = 1320 watts x 3 units is 3960 watts which = 33 amps, that's 3 amps over a 30 amp breaker and also exceeds the 10 gauge wire 30 amp max rating generally found on the 30 amp RV park/shore power connecting chord.Again this math all assumes your actually getting 120 volts, as I mentioned before, my life experience has shown me most RV parks are often lower then 120 volts, especially during high occupancy and hot weather.
So for a Newmar owner or any other owner that wants to resolve the problem for $250 approx per unit, easy start is a great solution.I would not disagree with this, Im just saying be careful because the math required to run 3 units exceeds circuit size.Id hate to see someone spend 750.00 to later find out he/she is reseting a 30 amp breaker every 5 minutes.
If you have a non Newmar and don’t utilize central control from RV-C or KIB then you may be able to change to a furion chiller, which is arguably the best unit made today.I agree you can't find any 18K 120 volt roof top unit to run on 1450 watts MAX