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 > Brisk air in TT

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DrMaserati

Salem, OR

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Posted: 05/06/08 08:47pm Link  |  Quote  |  Print  |  Notify Moderator

Dave H M wrote:

SSG

I am shooting from the hip, but it sounds like you don't have the big sausage 15 amp min cord as the extension. Using a regular extension cord will result in the ac acting that way.

Forget about the volts and all that. Don't ask me how I figured all that out.

good luck bro

No, he doesn't have a "big sausage 15 amp cord," he's using a 20 amp cord.


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MELM

GA

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Posted: 05/06/08 09:01pm Link  |  Quote  |  Print  |  Notify Moderator

The A/C is spec'd for 115 volts AC, and he is reading 114.6 volts with the compressor running. That is good - not a power issue.

Does the compressor respond to changes in the thermostat setting? If the compressor is running and you adjust it to a warmer setting, does the compressor stop?

Be sure to wait for a couple of minutes to allow the pressure to bleed off and adjust to a colder setting. Does the compressor restart?

One other thing - the A/C compressors may not come on with air temps below about 60 degrees. I don't know what the temp's are where you are, but thought I might mention it since the unit did run for a longer time in the afternoon.

Mel

Retired Army SSG

Turner, Oregon

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Posted: 05/06/08 11:39pm Link  |  Quote  |  Print  |  Notify Moderator

MELM from what you just said, about the compressor engaging below 60deg F, maybe there is nothing wrong? the next warm day I have I will try it again, I am just going by all the vehicles I have owned.....the AC will blow cold air with the outside air temp in the 40deg range, so just figured the roof air should also?. Anyway everyone has been a big help, and as soon as I get another warm day 70+ I will try it again, I havent realy had a chance to use the air as it has been fairly cool so far. As soon as it warms up and my eye gets back to normal after my sergery last monday, I can get back to doing more testing.
Again thanks and I will let you all know what I find as soon as it warms up enough to try it again.
Richard

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Turner, Oregon

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Posted: 05/09/08 10:58am Link  |  Quote  |  Print  |  Notify Moderator

MELM I contacted the dealer where I purchased my TT, and the lead tech who is very helpfull, told me basicly what you said about not engaging lower than 60 deg, he told me that each one is a little differant, but usually they wont engage somewhere between 60-70deg. I am wondering if there might be an internal adjustment on the thurmostat to alow it to engage at a cooler temp, we like it colder than most folks, ON hot days we keep our home AC set at 65deg. As it seems to be the nature of the thurmostat to not alow the compressor to engage at a lower temp, maybe there is a replacement thurmostat that will alow it to engage down to the 50-60 range?
thanks again
Richard

javaseuf

Southern Cal

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Posted: 05/09/08 11:57am Link  |  Quote  |  Print  |  Notify Moderator

Many ac and refrigeration thermostats do have adjusting screws but they are very, very "touchy" and you could be asking for trouble if you try to adjust them. They are usually inset into the housing/mounting plate of the thermostat and there are sometimes two. One adjusts the cut-on/cut-off differential setting and the other the minimum/maximum.
Also, if you do attempt this, be very careful that you don't kink the capilary tube that comes off of the thermostat. Once damaged, the thermostat is no good.

Also, if your thermostat doesn't activate at 70 degrees as anothe poster mentioned, then there is a problem. The mechanical, roof-mounted thermostat on my previous Dometic operated well below 70 degrees and I had no problem getting ny inside temp below 70.

The other thing to check is that the capillary tube I mentioned is mounted correctly. The tip should terminate and be mounted in a rubber grommet mounted in the air-flow path of the return air. If the grommet is missing or damaged, the thermostat will sense the temperature of the metal it is touching and will then short-cycle.


Steve
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Retired Army SSG

Turner, Oregon

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Posted: 05/12/08 11:06am Link  |  Quote  |  Print  |  Notify Moderator

update on my Briskair, I did contact the manufacturer (Dometic) and they replied back, that they are only designed to engage the compressor no lower than 65deg, due to the potential problem of the coils icing up.
Well, I am wondering if anyone has had this problem, and if anyone knows how to make it engage at 55-60deg. Would it work to install a wall thurmostate? as it looks like it could be done by disconnecting the blue wire going to the thurmostate and the blue one going to the compressor. Or would there be an easyer way? I would be happy if the AC would keep the temp at 65deg, not engaging the compressor at 65 which is probably closer to 70deg.
Any help would be helpfull.
Thanks
Richard

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Turner, Oregon

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Posted: 05/15/08 03:38pm Link  |  Quote  |  Print  |  Notify Moderator

up date, almost 90deg day today have had the AC on and it is working, but even at the coldest setting it is not real comfortable inside. The owners book states that it will work (engage compressor) between 65-90deg.
I am wondering if I can install a remote wall thurmostat and bypass the original one mounted on the unit? I can see no reason why it should not work lets say at 55-60deg. As it is now, for our comfort it will cycle off much too soon. When it is working the air is blowing nice and cold, so I am convinced it is a thurmostat calibration problem. Anyone have any advise?
Richard

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