Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-13-2015, 01:17 PM   #15
Moderator
 
jcanavera's Avatar

 
2004 30' Classic Slideout
Fenton , Missouri
Join Date: Mar 2002
Posts: 9,002
Images: 143
Send a message via AIM to jcanavera Send a message via Skype™ to jcanavera
Also be aware that if everything looks clean, coils freezing up can also be an indication of low refrigerant which may mean a leak.

I did have a freeze up on my SOB when it was new when I was down in Destin Fl. Air conditioner guy did weekly trips through the campground and stopped in to see me. He told me that running the fan at low speed in high humidity climates can cause the coils to ice. He told me to make sure the fan was in high speed to promote air flow. Did that and never froze up again while on that trip.

Jack
__________________

__________________
Jack Canavera
STL Mo.
AIR #56
'04 Classic 30' S.O.,'03 GMC Savana 2500,'14 Honda CTX 700
jcanavera is offline   Reply With Quote
Old 06-13-2015, 02:04 PM   #16
Rivet Master
 
Fly at Night's Avatar
 
2010 27' FB Flying Cloud
Fraser Valley , British Columbia
Join Date: Jan 2011
Posts: 2,693
Images: 10
jcanavera, come to think of it - the recent problem started after running all afternoon on low!

The first day I used a/c, was on high all day. No problem.

Thanks for telling us about your experience.

Holding my breath.....and the air conditioner is still blasting cold and hard.
__________________

__________________
easily distracted by shiny objects
Fly at Night is offline   Reply With Quote
Old 06-13-2015, 02:27 PM   #17
cwf
Rivet Master
 
cwf's Avatar
 
1999 34' Excella
Currently Looking...
Hillsboro , Texas
Join Date: Feb 2013
Posts: 5,928
Images: 2
Quote:
Originally Posted by Fly at Night View Post
paiceman, the a/c also did this when I was plugges into 30 amps at RV park.
I will look into getting 30 amp outlet, though.

Anyway, did the fan only setting for an hour and tried it again this am. She is blowing hard and cold again. For how long? We'll see. Maybe I'll get lucky and the trailer will resolve the issue itself again.
Sounds like a freeze up.. Did you have it on max cold? Can you set fan speed? If so, set high fan, but not as cool as you want it at first... Let the AC remove a lot of moisture from air then Drop Temp.

Make sure filters clean.
__________________
Peace and Blessings..
Channing
WBCCI# 30676
cwf is online now   Reply With Quote
Old 06-13-2015, 05:01 PM   #18
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Quote:
Originally Posted by Fly at Night View Post
I'm driveway camping - plugged into outlet in garage which is 20 amp, I think.

Is this too weak for a/c?
Running an AC on 20 amps can damage the unit even though it initially seems to run OK.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 06-13-2015, 06:07 PM   #19
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Not really....... After all, it IS connected to a 20 amp circuit breaker at the trailer, breaker box........but I would ONLY run the A/ C and nothing else.

Full load running amps for the Dometic units are around 3 for the blower motor and 12-13 amps for the compressor. That totals 16 amps, and this is measured at 90 degrees F. at lower ambient temps, the compressor draws less than that.

Since the start spike of up to 50 or do amps is transient, super short and covered by the start capacitor. There should be no problem with a true 20 amp circuit.

Just be very aware of the size and length of any extension cords you may use. As too small a wire gauge will result on noticeable voltage drop.


Lew Farber
RVIA/RVDA Nationally Certified Master Tech
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center
Lifeline Batteries**Magnum Inverters
541-490-6357
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 06-13-2015, 08:54 PM   #20
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
[QUOTE=lewster;1636528]Not really...
Lew Farber

Not saying you are wrong. I am not claiming expertise, but the question if 20 amps is sufficient to run even a 13.5 AC has been asked on the forums a gazillion times. Every time I can remember the answer was no. If I remember correctly the claim was the initial start up draw put a strain on the compressor.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 06-13-2015, 11:41 PM   #21
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
They run fine on a 2400 watt Yamaha generator......2400 watts = 20 amps @ 120VAC. when I was at the Dometic factory training school many years ago, 20 amp lines are what we used for bench testing and running all of the units in the training sessions too.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 06-14-2015, 01:26 AM   #22
Rivet Master
 
J. Morgan's Avatar

 
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton , Arkansas
Join Date: Mar 2013
Posts: 5,042
Images: 11
Air Conditioner Went From Big Blast to Small Blow

If a 20 amp breaker is not enough to pull a a given load, the breaker will trip, if the breaker does not trip under a given load, it is sufficient.

A 20 amp breaker will not deliver any less current than a 30 amp breaker unless or until it trips.

As Lew said, the gauge of wire and the length of the run can make a difference, but unless the run is very long, this will not make a big difference regarding the issue at hand so long as the trailer is not connected with an extension cord too small a gauge for the job.
__________________
The fact that I am opinionated does not presuppose that I am wrong......

J. Morgan is offline   Reply With Quote
Old 06-14-2015, 08:11 AM   #23
Moderator
 
jcanavera's Avatar

 
2004 30' Classic Slideout
Fenton , Missouri
Join Date: Mar 2002
Posts: 9,002
Images: 143
Send a message via AIM to jcanavera Send a message via Skype™ to jcanavera
If you can use a digital voltage tester it is always interesting to see the voltage in the trailer before and after you start the A/C unit. I have a 15K unit and have plugged in to an extension cord and have watched the voltage drop in an interior outlet in the Airstream to as low as 108 volts. Using a 20 amp adapter plug to plug directly into my garage outlet, I still saw at least a 5 volt drop. With that in mind I don't run the A/C unit while parked at home.

It's also interesting to monitor the power available when camped. I've seen it as high as 122 volts and as low as 94. Needless to say that 94 volt was an old former KOA that was bought by a first time campground owner. He had no idea the wiring had deteriorated that much. I remember pulling into the campgrounds for a WBCCI rally with the folks telling me as soon as I got there that we couldn't use the air conditioning.

Typically I keep my digital voltage meter plugged into the wall outlet in the kitchen area to monitor the campground voltage. Sometimes you start up good but as the campground fills and the air conditioners turn on I've seen some loops drop significantly. It bears watching when you are out. Due the the power needs of the water heater and refrigerator, I've switched both over to gas when voltage levels drop to keep voltage up for the A/C unit.


Jack
__________________
Jack Canavera
STL Mo.
AIR #56
'04 Classic 30' S.O.,'03 GMC Savana 2500,'14 Honda CTX 700
jcanavera is offline   Reply With Quote
Old 06-14-2015, 04:34 PM   #24
Rivet Master
 
Fly at Night's Avatar
 
2010 27' FB Flying Cloud
Fraser Valley , British Columbia
Join Date: Jan 2011
Posts: 2,693
Images: 10
Thanks again for all your replies. The breaker has not tripped, so looks like I am getting away with the reduced amp.

Air conditioner is working well again - but I do not leave on "cool" all the time. If I am going out, will change to "fan only." This seems to be the trick. However, I will get those coils looked at.

Really appreciate all your help!!!!!!!!!!!!!!!!!

I don't think I would have purchased (or kept) an Airstream without the body of knowledge on this forum! (Big hug!)
__________________
easily distracted by shiny objects
Fly at Night is offline   Reply With Quote
Old 06-14-2015, 07:54 PM   #25
Moderator
 
jcanavera's Avatar

 
2004 30' Classic Slideout
Fenton , Missouri
Join Date: Mar 2002
Posts: 9,002
Images: 143
Send a message via AIM to jcanavera Send a message via Skype™ to jcanavera
Just an FYI, reduced voltage will not cause a freeze up. It will cause your fan motor and compressor to generate excess heat which can damage those components.
__________________
Jack Canavera
STL Mo.
AIR #56
'04 Classic 30' S.O.,'03 GMC Savana 2500,'14 Honda CTX 700
jcanavera is offline   Reply With Quote
Old 06-18-2015, 10:22 PM   #26
Rivet Master
 
Fly at Night's Avatar
 
2010 27' FB Flying Cloud
Fraser Valley , British Columbia
Join Date: Jan 2011
Posts: 2,693
Images: 10
jcnavera, until I get the 30 amp outlet, am using as little as possible. Have not used it much since purchase - thanks to our cool/wet climate.

The heat finally broke. Is raining and cool. I love it when it's like this because the windows are open and am enjoying nature's "air conditioning." Have always thought Airstream designed the best windows for the rain. You can have them fully open and not one droplet gets in (unless the wind is blowing really hard).
__________________
easily distracted by shiny objects
Fly at Night is offline   Reply With Quote
Old 06-18-2015, 10:26 PM   #27
Vintage Kin
 
slowmover's Avatar
 
Fort Worth , Texas
Join Date: Nov 2006
Posts: 7,582
Images: 1
Jalousie a hard to beat for same. And nothing else quite "catches" the breeze so well.

But down here balancing the A/C against the dehumidifier is the trick.
__________________
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 offline   Reply With Quote
Old 06-20-2015, 08:36 PM   #28
2 Rivet Member
 
gr.austin's Avatar
 
2009 27' FB Classic
Sioux Falls , South Dakota
Join Date: Oct 2009
Posts: 57
Just a final note

1. Yes you can run your A/C on 20 Amp all day and all night without harm.
2. The voltage to the A/C MUST be at least 108 VAC. Lower voltage at the compressor will cause failure to start. In this mode the unit will try to start a few times per hour depending on how long it takes for the compressor to cool down. It can be in this mode for several hundred start attempts without failure. Remember that if your voltage is at 108 and you have small wire 14awg or 12awg then when it goes to start the voltage at the compressor may drop below the 108 and eventually cause a failure particularly if it is very hot outside 95+.
3. The power cord to the trailer MUST be at least 12AWG wire and NOT more than 50' 10AWG would be better if length is 50+ feet
4. There is NOTHING on the roof to inspect, check or service that would cause a coil freeze-up.
5. The freeze-up is caused by only three things:
a. Low refrigerant level (Not likely on a new unit)
b. Low air flow (blocked coil, dirty filter, low fan speed) Unit voltage will not cause coil freeze up
c. Low load. If you set the unit at 65 and the RH goes to 40% it is very likely to freeze the coil. This is what I think has happened to you.

NOT to Worry

Your A/C unit has many safeties to keep it running:
1. If you have low voltage the unit will trip off on an internal safety and will only allow restarting attempts that will not ruin the compressor. (if left unattended for many days (28) then the unit is allowed to die.
2. If the unit does overheat which it is allowed it will NOT die. The safeties will protect the unit for up to 28 days.

It is a very smart not to leave the A/C on when you are not there.

Happy Camping
__________________

__________________
gr.austin is offline   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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Small Rooftop Air Conditioner AC Options. Please help! Trestrey Furnaces, Heaters, Fireplaces & Air Conditioning 0 05-19-2015 11:35 AM
Air conditioner went south... Bing-Bing Furnaces, Heaters, Fireplaces & Air Conditioning 12 06-16-2011 07:14 PM
air conditioner- how big and which brand? gparker Furnaces, Heaters, Fireplaces & Air Conditioning 6 07-14-2006 08:06 PM
Region 1 Rally 2004 (What a BLAST!!!) AirHog WBCCI Rallies & Events 25 08-24-2004 09:48 AM
BIG BIG AIR HUG!!! & "eh" Streamin' THANKS GT1963 Our Community 6 01-30-2004 08:50 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:56 PM.


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.