Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-06-2012, 05:54 PM   #1
Rivet Master
 
VeggieBullet's Avatar
 
1973 31' Sovereign
2007 20' Safari SE
Vintage Kin Owner
Wesley Chapel , Florida
Join Date: Oct 2011
Posts: 879
Outside Smoke is coming inside thru the AC!!!

Hi guys.
Is this normal with the Rv AC? Why is the AC always bringing the outside smells into the trailer?
When someone is making a fire somewhere it is just terrible inside, not considering the toxicity factor..
Does everyone else have the same issue?
The Ac unit is a Low Profile Penguin /Duoterm by Dometic
Any inputs about how to fix this will be great.
__________________

__________________
Still One Nation under GOD
2 chronicles 7:14
VeggieBullet is offline   Reply With Quote
Old 11-06-2012, 06:16 PM   #2
Site Team
 
Aage's Avatar
 
1974 31' Sovereign
Ottawa , ON
Join Date: May 2008
Posts: 11,204
Images: 25
It is unusual: it is my belief that the AC units do not pump outside air in.

There is a fan that takes inside (cabin) air in, chills it, then blows it out again. The fan shaft also drives a fan blade on the out side that serves to blow outside air over the cooling fins of the plumbing of the AC unit.

No air is taken into the cabin of the trailer, from what I have learned about AC units.
__________________

__________________
“Courage is being scared to death, but saddling up anyway.”
...John Wayne...........................
Aage is offline   Reply With Quote
Old 11-06-2012, 06:22 PM   #3
Rivet Master
 
TBRich's Avatar

 
2006 19' Safari SE
Tucson , Arizona
Join Date: Jun 2007
Posts: 4,483
Images: 64
That's my understanding as well. When we've had outside campfire smoke odors inside, it's been through the vents or windows, especially if the Fantastic Vent is powered up and blowing outwards...(bringing in air through other openings)...
__________________
TB & Greg and Abbey Schnauzer
AirForums #21900 . Membership Chair, 4C
Unit #3954
Travel Log: AZBambi...On the Road Again
TBRich is offline   Reply With Quote
Old 11-06-2012, 07:53 PM   #4
Vintage Kin
 
slowmover's Avatar
 
Fort Worth , Texas
Join Date: Nov 2006
Posts: 7,576
Images: 1
May be a good idea to R&R the A/C unit. Be sure there are no low spots, etc, where air could be drawn in. An extra-thick gasket is available from RV supply houses. I've done this on both SS trailers as I assumed (correctly) that age had deteriorated them past the point of usefulness.

Also a good time to clean condenser and evaporator coils.
__________________
1990 35' Silver Streak Sterling; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 9-cpm solo, 15-cpm towing
Sold: Silver Streak Model 3411
slowmover is online now   Reply With Quote
Old 11-06-2012, 08:10 PM   #5
Rivet Master
 
garry's Avatar
 
1969 31' Sovereign
Broken Arrow , Oklahoma
Join Date: Jan 2003
Posts: 1,362
Images: 7
Sounds more like an open bath vent, bad gasket or air leak around the widoows.
__________________
Garry
garry is offline   Reply With Quote
Old 11-06-2012, 08:26 PM   #6
4 Rivet Member
 
arcamedies's Avatar
 
1993 30' Excella
Lakeland , Florida
Join Date: Nov 2009
Posts: 343
Images: 69
Blog Entries: 5
I was told, nope it can't happen but when the a/c took a dump and the new Penguin was installed the black tank smell I would get with the wind blowing from the rear dissappeared instantly. Flush toidy and instant smell from a/c vent blown in face, not pleasant. Dometic even notes and improved seal with the new units preventing outside odors being sucked into the low presssure side and distributed into your airstream.
__________________
arcamedies is offline   Reply With Quote
Old 11-08-2012, 08:37 AM   #7
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
From All Over , More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,294
There is one way it could happen. Looking at the Duo-Therm AC Service Manual that I downloaded from http://bryantrv.com/docs2/docs/acservice.pdf, the return air plenum surrounds the cold air duct. The return air plenum is insulated where it penetrates the roof, and this insulation is supposed to form an airtight seal. If the insulation around the return air plenum is not installed properly (not forming an airtight seal), it is possible for outside air to leak in and then be drawn into and distributed by the AC fan.
__________________
WBCCI #1105
TAC LA-4

My Google-Fu is strong today.
Protagonist is offline   Reply With Quote
Old 11-08-2012, 09:05 AM   #8
Vintage Kin
 
slowmover's Avatar
 
Fort Worth , Texas
Join Date: Nov 2006
Posts: 7,576
Images: 1
Gasket. The pressure differential is the culprit.
__________________
1990 35' Silver Streak Sterling; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 9-cpm solo, 15-cpm towing
Sold: Silver Streak Model 3411
slowmover is online now   Reply With Quote
Old 11-08-2012, 09:19 AM   #9
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
From All Over , More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,294
Quote:
Originally Posted by REDNAX View Post
Gasket. The pressure differential is the culprit.
Yeah. The manual doesn't call it a gasket, but that's what it is.
__________________
WBCCI #1105
TAC LA-4

My Google-Fu is strong today.
Protagonist is offline   Reply With Quote
Old 11-08-2012, 10:05 AM   #10
jm2
Rivet Master
 
jm2's Avatar
 
2002 25' Safari
1977 20' Argosy 20
northern valley , new jersey
Join Date: Nov 2008
Posts: 530
VeggieBullet, in addition to Protagonist's suggestion,

there is about nine feet of 1-1/4" square foam tape located in between the top of the airconditioner chassis and the underside of the Penguin shroud. that foam tape separates the "inside air" blower wheel plenum from the "outside air" blower wheel plenum.

here's some drawings - Replacement Shroud Penguin Low Profile Rooftop RV air conditioners 3308046.006

when I replaced our Penguin shroud, the directions said to apply the new foam tape to the inside of the shroud (as in Figure 1). judging by the amount of compression to the old foam tape, you could easily see that the tape was mislocated in one area.

I couldn't imagine being able to locate it properly or completely like that, so I installed it to the top of the chassis, instead (as in Figure 2). it works fine there!

I'd pull the shroud to make sure that foam tape is properly in place....

best,
__________________
Joseph & Gabrielle

Simplicity is the ultimate sophistication - Leonardo da Vinci.

WBCCI 2087 - AIR 3144 - TAC-NJ2

http://defendwally.org/
jm2 is offline   Reply With Quote
Old 11-08-2012, 07:41 PM   #11
Vintage Kin
 
slowmover's Avatar
 
Fort Worth , Texas
Join Date: Nov 2006
Posts: 7,576
Images: 1
I used a couple of rolls of 361-11 NASHUA Waterproofing Repair Tape (butyl-backed aluminum foil) when installing the 15K RVP A/C unit last March. From the interior of the A/C opening to a fair distance outside.

Also used some outside on an exterior wall. Does what it claims and then some. Heavy downpours have not fazed it.

.
__________________
1990 35' Silver Streak Sterling; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 9-cpm solo, 15-cpm towing
Sold: Silver Streak Model 3411
slowmover is online now   Reply With Quote
Old 11-09-2012, 10:12 AM   #12
Rivet Master
 
VeggieBullet's Avatar
 
1973 31' Sovereign
2007 20' Safari SE
Vintage Kin Owner
Wesley Chapel , Florida
Join Date: Oct 2011
Posts: 879
Hi Guys
Sorry for the delay on getting back to the thread.
wow...that's a lot of info, need some time to digest...
__________________
Still One Nation under GOD
2 chronicles 7:14
VeggieBullet is offline   Reply With Quote
Old 11-11-2012, 12:35 PM   #13
Rivet Master
 
VeggieBullet's Avatar
 
1973 31' Sovereign
2007 20' Safari SE
Vintage Kin Owner
Wesley Chapel , Florida
Join Date: Oct 2011
Posts: 879
please excuse our ignorance in the subject and therefore the following confusion.
Are we talking here about :
1) the gasket that is used when installing the AC? Solution: Remove the AC and replace the gasket and cleaning the condenser and the coils.
b) Is there a gasket for the Shroud that has to be replaced and that it doesn't require the removal of the all unit?
__________________
Still One Nation under GOD
2 chronicles 7:14
VeggieBullet is offline   Reply With Quote
Old 11-11-2012, 02:40 PM   #14
Vintage Kin
 
slowmover's Avatar
 
Fort Worth , Texas
Join Date: Nov 2006
Posts: 7,576
Images: 1
Yes, to No. 1

No separate gasket for shroud (some NVH foam in a few places underneath).

The unit is heavy, but really one is just propping it up and sliding it onto a tarp or something while the opening is cleaned/prepped and gasket (cushion) is replaced.

I used the tape as the surface the gasket sits on (slightest build-up from roof) but started (as did Silver Streak) by sealing the roof opening (smaller than the A/C opening that will go over it). I continued this into the interior going just slightly farther than did the factory. Same for roof.

Drop the A/C in place (center from interior) and evenly "clamp down" the unit per instructions (X-pattern; gradually).

.
__________________

__________________
1990 35' Silver Streak Sterling; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 9-cpm solo, 15-cpm towing
Sold: Silver Streak Model 3411
slowmover is online now   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:07 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.