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Old 06-08-2014, 11:58 PM   #1
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What about heat?

2012 Tiffin allegro. Sitting in the Grand Canyon now and need to head down to Riverside CA Tuesday. Temps in the 100' along the route, needless Barstow.. Ugggghhh! Is this ok on the Ford F53? Is it ok to run generator in that kind of heat?
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Old 06-09-2014, 07:35 AM   #2
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Yes and in fact it will be easier on your engine cooling system to run your coach a/c with the generator and turn off the dash a/c. Also try to cool the coach down early, get ahead of the heat don't try to catch up. Now this is assuming your generator cooling system is up to snuff with proper air flow and coolant levels.
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Old 06-09-2014, 07:48 AM   #3
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Quote:
Originally Posted by Rkh View Post
2012 Tiffin allegro. Sitting in the Grand Canyon now and need to head down to Riverside CA Tuesday. Temps in the 100' along the route, needless Barstow.. Ugggghhh! Is this ok on the Ford F53? Is it ok to run generator in that kind of heat?
Rkh
Yes and yes.... IF the coach and genset have been maintained properly.
(And IF both engines contain oil of the recommended viscosity for 100+ temps).
Happy travels.
Mel
'96 Safari
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Old 06-09-2014, 08:10 AM   #4
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Use the generator or lose it. It need to be run. Stay cool while driving.
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Old 06-09-2014, 08:17 AM   #5
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We just came through Primm and Vegas NV it was so hot that many rv's were seen sitting in the parking lot with no one in them because their a/c's couldn't deal with that much heat. So they got a room instead. We traveled with all a/c's going and were uncomfortable, in the over 100 deg. heat. Its difficult for a moho to hold down the heat when temps are going near or over a 100 deg. and the moho is in direct sun with no shade.
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Old 06-09-2014, 09:14 AM   #6
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I've crossed that desert many many times. If the heat is a concern to you then drive at night or early in the morning. It's not like your going to miss seeing any scenery ! This time of year it cools down at night enough to sleep without AC so you can drive until your too tired then pull over somewhere (Stateline ?) then finish drive in morning hours.
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Old 06-09-2014, 11:44 AM   #7
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Rkh
Yes and yes.... IF the coach and genset have been maintained properly.
(And IF both engines contain oil of the recommended viscosity for 100+ temps).
Happy travels.
Mel
'96 Safari

Hi Mel, the genset and engine just serviced. Engine has motorcraft 5-20 premium synthetic blend per Ford.
This is a 37' gas coach. There are only 4-6 hours per 24hr period over the next two days where temps are below 100 along the I-40, I-15 route.. Wonder if the coach will even be comfortable enough in this heat even with both roof a/c and dash running..

Just more concerned about weather the engine and genset are designed for this use. Both are in great service condition.
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Old 06-10-2014, 07:54 AM   #8
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Was in that heat last summer with it topping out at 118 in Needles. Ran the generator with roof air and dash air. Couldn't keep up with the heat. The ambient temp for 1 ac is about 20 degrees less than outside air. The only time the generator quit was when we weren't driving and sitting in a parking lot grocery shopping or checking in at a park. My engine temps never rose about 195 and MH didn't care where I went.
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Old 06-10-2014, 08:04 AM   #9
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I've found that letting the roof fan run on low (we have the Maxx fan vent) seems to help suck out the hot air and keep the MH a little bit cooler than not using it. We've not been in heat that extreme though so not sure it would make a difference at all.
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Old 06-10-2014, 08:46 AM   #10
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Just remember. That heat out west is a dry heat. Lol
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Old 06-10-2014, 09:21 AM   #11
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Was in that heat last summer with it topping out at 118 in Needles. Ran the generator with roof air and dash air. Couldn't keep up with the heat. The ambient temp for 1 ac is about 20 degrees less than outside air.
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Correct
The Delta-T, (temperature difference between the incoming and out going air moving through a properly operating air conditioner), is no more than 20 degrees F.
That makes it imposable for an air conditioner to reach and maintain a comfortable level, (aka: "keep up with the heat"), when OS temps are extremely high.

118 degree air IN = 98 degree, (or warmer), air OUT.

Mel
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Old 06-10-2014, 09:44 AM   #12
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I plan to camp in Kingman AZ tonight. On the road by 6am from Kingman and I should miss the 100 degree temps!
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Old 06-10-2014, 10:17 AM   #13
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Quote:
Originally Posted by mel s View Post
awarnes
Correct
The Delta-T, (temperature difference between the incoming and out going air moving through a properly operating air conditioner), is no more than 20 degrees F.
That makes it imposable for an air conditioner to reach and maintain a comfortable level, (aka: "keep up with the heat"), when OS temps are extremely high.

118 degree air IN = 98 degree, (or warmer), air OUT.

Mel
Very true but since RV A/C units recycle the air those temperatures are inside, not outside. So eventually the inside will cool down and why it's important to not let the inside temperatures get too hot to start with. Once the output of the A/C unit matches the heat loss of your RV that is as cool as it will get.
As for the outside temperatures, once I experienced the compressor overheating and shutting down when the outside temperature was 118+ (something that happens here often). I found out later that the fins on the coil were damaged preventing some airflow so hopefully that won't happen again.

See this document: http://www.rvcomfort.com/pdf_documen...erformance.pdf
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Old 06-10-2014, 11:02 AM   #14
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The trick is to turn on the air conditioning when you get on the road BEFORE the coach gets hot inside.

Once that baby is hot inside you'll have a hard time cooling it down.
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