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Old 09-27-2015, 12:18 PM   #41
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Just curious, does your RW at night have a problem with equalization of temps between the Front of the RV to the Back. - We have the FL floor plan which is a different animal than the rear living units. Both our Thermostats are in the middle kitchen area, one is on the pantry wall and one is by the stairs going up to the living area. With all the mods and additional ceiling vents I have done, our temperatures are pretty equal with the bedroom being a few degrees cooler due to the rear A/C unit being mounting over the rear bedroom.


If the temps get up in the upper 80's to 90's these units just will not cool it down below 76. - After all the A/C mods, we can keep our RW in the low 70s with the outside temps in the 80s to low 90s. The A/C still struggles if the temps are in the Mid to Upper 90s and we are in direct sun, the inside temp will get up to the mid to upper 70s.


How did you know where to cut to install those extra returns? - I measured 4 times and cut once , there is ceiling light near where I was going to cut, so I took the light fixture out so I could see the duct and verify my measurements before cutting. I was nervous cutting the first one since I was cutting close to the supply ducting and the wiring RW runs beside the duct, but it all worked out perfect.


And did you add any returns up in the front. To me this is were the design just doesn't make sense. - Our FL only had a total of 7 supply vents in the ceiling as built by Redwood, according to Air Conditioning Vendor at the Rally, each 15K A/C unit should have a minimum of 5 ceiling supply vents, so our Redwoods with two 15K A/C units should have a minimum of 10 ceiling vents.


What did you do on the return vents, go to the other side of the obstruction from the supply and wiring? Great idea if that was the objective! - AA, I did not go to the other side, I thought about it long and hard, but was concerned about the A/C noise level when getting too close to the A/C unit, the new returns are still outboard the supply ducts, the cutouts for the returns are right next to the supply ducts, that gave me access to the obstruction area and I was able to remove and correct the obstruction by putting Zip Ties on the wiring bundles so they were not hanging down blocking the air flow space under the supply duct and added the foam blocks on top of the ducts to hold up the bubble foil and remove excess spray foam around the supply duct. (The picture posted of the foam blocks is not the finished product, I used foil A/C duct tape to secure them in place)


After all the repairs, corrections and mods (Reinstalled the foam seal between the supply and return plenum under the A/C unit roof area, added 3 Ceiling Supply Vents to bring our total up to 10 Supply Vents, Cut all the Ceiling Supply Vent Collars down approx. 3/8" so they are not sticking up inside the duct and blocking the supply duct air flow, added two return registers to each A/C unit and cleared all return plenum obstructions and blockages) our A/C system is now preforming fairly good, we have good air flow on both units, the interior noise level has not increased.


It is a shame for a nice coach in the 100K price range I had to do so many mods and corrections to get the A/C system working right, all the items were manufacturing / design defects, from not enough supply registers (as verified by the vendor) to vent collars blocking the duct, to bubble foil falling down blocking the return and such.


All this is on MY DIME, my time to do the corrections / mods, I bought the additional Ceiling Supply Vents, I bought (from Redwood) the additional Return Registers, my material costs alone are probably approximately $100 to correct Redwood design / manufacturing errors.
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Old 09-27-2015, 03:18 PM   #42
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Great info!!! Thank you for your time to post this. I will be doing this soon. Any problems getting the matching vents? Or just give RW a call?

Steve
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Old 09-27-2015, 04:12 PM   #43
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Called Tiara RV and ordered them, about $10 each
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Old 09-27-2015, 04:27 PM   #44
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Thanks Rob!

I see Redwood redesigned the new HVAC to correct the issues, but they lost the feature of it all being integrated (run 1 AC or 2). Now the ACs are dedicated to a zone, there is no cross flow between zones. I guess that was an easy way to not have supply cross the return.
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Old 09-27-2015, 09:55 PM   #45
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Quote:
Originally Posted by atom ant View Post
Thanks Rob!

I see Redwood redesigned the new HVAC to correct the issues, but they lost the feature of it all being integrated (run 1 AC or 2). Now the ACs are dedicated to a zone, there is no cross flow between zones. I guess that was an easy way to not have supply cross the return.
But AA, I do not see a change in the return plenum design ( the one in my posted picture does not have the foam yet or the roof layer of bubble foil ) and are the supply vent collars still sticking up too high into the supply ducts.
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Old 09-27-2015, 10:02 PM   #46
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I haven't seen the new design Rob, it was just one of the changes they started with the 39RD model.
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Old 09-27-2015, 10:10 PM   #47
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This is a picture of a new 2016 with the flat roof line taken at the 2015 Rally.

I can not see much difference in the return plenum area.

RoofTop.jpg
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Old 09-27-2015, 10:18 PM   #48
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It's probably only on the 39RD so far. They do that a lot. From the Hershey show:

New Standard Features:
Straight Roof Line w/Newly Designed Rear Cap [the roof is straight from front to rear, no slope]
Correct Track [added to the Equa-Flex suspension system]
Wastemaster Waste Management System
Aluminum 4-Step Entry
Energy Management System
Hand-Laid Vinyl Tile
Wooden Interior Steps
New Accent Lighting on Crown Molding
New Over-Island Lighting
New Bedroom Ceiling Treatment
New Convection Microwave
Redesigned Executive Pull-Out Desk
New Fireplace
New Jensen Sound System w/Surround Sound
Reengineered WhisperQuiet A/C Zoning System for Higher Air Volume [two separate duct systems, one for bedroom [front] and a second for LR/Kit [rear]. The front system has vents in the BR closet]
LED Tail Lights
Outside Speakers
Redesigned Rear Storage Compartment

New Options:
New Décor: Tudor
Theater Seating
3rd A/C Unit – 15,000 BTU [added to the rear duct system]
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Old 09-28-2015, 01:01 AM   #49
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Yep AA, we saw the new 3 A/C System at the plant during the tour, the design is still the same, they just separated / cut the duct lines between the bedroom and living room so two A/C units service the ducts for only the Living Room and one A/C unit services the bedroom portion of the ducts, the return plenums still the look the same unless they have come up with something to hold up the bubble foil to prevent it from falling down and blocking the return air flow to the A/C unit.
Below are pictures of a 3 A/C unit at the Factory, look close near the front end of the coach, the ducts are separated but the design is the same.
Attached Images
File Type: jpg 9_8_2015 427.jpg (280.8 KB, 6 views)
File Type: jpg 9_8_2015 428.jpg (293.3 KB, 3 views)
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Old 09-28-2015, 02:23 AM   #50
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well so much for the Redwood bragging rights on a new design - they didn't fix the problem at all, unless the improved pass through was the fix.

So what was "Re-Engineered"? What makes it higher volume (other than a 3rd AC)?
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Old 09-28-2015, 02:56 AM   #51
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Marketing !!!!
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Old 09-28-2015, 03:13 AM   #52
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They certainly focus on that
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Old 09-28-2015, 11:44 PM   #53
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Please PM me also if you hear anything from Redwood. My 38 GK is hot too.
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Old 09-28-2015, 11:47 PM   #54
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Can they change out my two 13,500BTU units for 15,500 units? Is there enough amps available to run them? My 38 GK has been hot all summer and we live in Colorado with highs in the 90 degree range. Thinking of moving to Az. and worried about the 110 temps.
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Old 09-29-2015, 12:39 AM   #55
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Jon, have you looked at some of the issues folks are having with ducting? it might be a return air issue.
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Old 09-29-2015, 03:14 AM   #56
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And to my knowledge RW has never installed 13.5K ACs, it's been nothing but 15K ACs from Day One.
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Old 09-29-2015, 04:07 AM   #57
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Quote:
Originally Posted by jhardin View Post
Please PM me also if you hear anything from Redwood. My 38 GK is hot too.
I do not expect to hear anything from Redwood, thus I went ahead and did the mods to our A/C System myself.
Do not have time wait on Redwood or mess with the dealer!!!
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Old 09-30-2015, 03:35 AM   #58
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Again, too much glitz and glitter and not enough substance under the skin
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