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Old 02-18-2006, 10:55 AM   #1
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New Carrier HP/AC

Has anyone had any experience with the Carrier HP?
I have installed a 15000 btu carrier ac/hp the ac has worked fine this summer
but the heat did not work,but two weeks ago with the help of carrier tech support we found the problem a loose 2pin connecter on the top side.
now I have ran the unit off and on for a couple of weeks with the best temp at 83.with an outside temp of 45 to 60
now this weekend we have cold front coming thru and the outside temp is 33
now the best temp I have gotten is 60 inside. Makes me wonder if the temp drops further could you stay in this thing without backup heat?
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Old 02-18-2006, 12:57 PM   #2
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I have a heat pump on my house and what you are seeing is normal. Heat pumps work by pulling heat out of the outside air and heating the inside of the house (trailer). It is just the reverse of when you cool with it. Then it is pulling the heat out of your house and pushing it ouside. As the ouside temp drops there is less heat to transfer inside, the efficiency drops. Heat pumps are best suited for areas that do not have severe winters. I would suggest backing up the heat pump with a space heater if needed.
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Old 02-18-2006, 01:16 PM   #3
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Quote:
Originally Posted by 2toomany
now I have ran the unit off and on for a couple of weeks with the best temp at 83.with an outside temp of 45 to 60
now this weekend we have cold front coming thru and the outside temp is 33
now the best temp I have gotten is 60 inside. Makes me wonder if the temp drops further could you stay in this thing without backup heat?
I do not think that the heat strips in roof a/c units are supposed to be a primary heat source. I understand that they're supposed to be for light chills, to keep the trailer comfortable on cool mornings in the spring or fall.
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Old 02-19-2006, 06:54 PM   #4
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The heat strip is just a resistive loop. If you're not worried about running the fan, let the A/C run. It will keep the air circulating even if it's not the primary heat source, and the trailer will be more comfortable. Besides, the heat strip will contribute *something.*

I've found that the heat strip is good for about a thirty degree difference only. I set the furnace thermostat for the temperature that I really want to wake up to, but in the mild winter climate here, I usually find that the heater outlet isn't even warm when I wake up.

2toomany, the furnace is the primary heat in the trailer - it's not the backup. Think of the heat strip as casual use heat. Don't plan on going through a cold night on it alone.

Lamar
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Old 02-19-2006, 09:09 PM   #5
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Thanks for the help but I believe that their is a misunderstanding, the carrier ac/hp does have a heat strip but the hp in the title means heat pump so the unit provides primary heat via the heatpump and also breaks a chill by the fan running over the heat strip when it is not cold enough for the heat pump
I have done a little reading and as azflycaster has suggested the heat pump is a good source of heat but not around and below freezing, the heat pump brings air from the outside and blows over the radiator in a reverse cyle the ac/hp generates heat giveing you hot/warm air which is circulated inside the trailer the other day it was 33 with the wind blowing mixed with ice which made for a wind chill much below 33, from what I have read the heat pumps for rv are not designed for very cold weather because it uses the outside air to warm and does not cycle the air from inside the camper. The temp was still ok about 65 after running most of the day. Just though it would preform more like the furnace. oh well something else that can be rebuilt
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