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Old 07-28-2011, 07:18 PM   #1
rhm
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Trying to understand a/c

I have two a/c units on my new to us '04 Fleetwood Providence. I thought one would support the front of the coach and one the rear, but they both seem to blow through all the ducts.

I also find the front very loud compared to the rear and there is much more air flow from the front unit.

Does that seem right? I don't have much for manuals.

I'm plugged into 50 amp service and I have the thermostat for both zones set to cool, auto.


thx
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Old 07-28-2011, 07:34 PM   #2
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Yes your ducts are tied together. Your front air is probably a 15000 which would be louder than the 13500 in the rear.
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Old 07-29-2011, 08:41 AM   #3
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I have an 07 bounder diesel with two heat pumps on the roof, yours may be similar. I set my thermostats so that #2 is lower than #1 for the same reason that you described. #1 is louder because it is in the main salon. So #2 runs most of the time (it is also the bigger of the two units). During the afternoon both units are required to keep the coach cool.
Start searching the net for instruction manuals for your systems. Maybe some smart computer person could set up a manual repository on this site.
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Old 07-30-2011, 11:17 AM   #4
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We have a similar setup and do the same as pcurt does as far as the settings. I have built baffles in our ceiling ducts so that most of the front air stays in the front and most of the back air stays in back, but allows for some to go both ways when on 30 amp and only using one air. We also find that a small fan running helps move the air around much more efficiently. On our 2001 Ambassador, we put a different grill on the front air that allowed for quick cooling of the front and bypassed most of the ceiling ducting. Another thing to check is to be sure that the duct ends in front, just does not keep going into the dark hole behinds tv. Our back air is in the bedroom not in the middle like some, so it cools the bedroom and bath area quite well. The front is more of a problem with all the front glass allowing heat in. Hope this may help. Happy Trails Bert
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Old 07-31-2011, 02:02 PM   #5
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Ducts tied together, Sometimes the front (Having a larger service area) is bigger. If you want only one end working, close the ducts in the other.

on my coach (Thankfully) both A/C's are the same size. Motor went out in the bedroom so I played musical motors (Blower motor) to keep cool at night till I could get a new motor in.. And of course Carrier don't sell the motor.. Thankfully the place I took it was sufficently "Ticked off" that he found one that is doing a first rate job. Even fit the same screw holes when we were done. When we put his Electric motor knowledge together with my training and observations.. Magic happened.
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Old 08-07-2011, 01:36 PM   #6
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Seems to be a lot of different configurations. On my 03 35r Bounder my ceiling registers are in pairs from front to rear. One unit flows out one string of ducts, the other out of the second. Makes it easy to adjust the flow from both units so to minimize the running of the salon unit.
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