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OT/another heat pump question

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guido
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Joined: 09 Aug 2007
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PostPosted: Tue Jan 02, 2018 6:47 am    Post subject: Re: OT/another heat pump question Reply to specific post Reply with quote

Hello Nancy Howell,

Thermostat setting @75 of 80 will not make the room warm quicker. You need to set the thermostat above the indoor temp a degree of two and see if the unit catches up and shuts off. Any temp below 32* the back up system should come on, as the coil freezing will stop the heat pump and turn on on defrost, and then on the back up strips. You're back up strips are manual? of You are putting them on as the unit is not catching up? You did not say If the unit is keeping the indoor temp of what that is. If it is running at that temp is not climbing, something is not right!. Having the owner's manual would tell you how it is wired-programmed. You need that manual. Maybe on line?

Guido.
 
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M-MAN
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PostPosted: Tue Jan 02, 2018 8:09 am    Post subject: Re: OT/another heat pump question Reply to specific post Reply with quote

A properly sized heat pump will run continuously in extreme heat or cold - makes no difference as it's operating at full capacity in either mode. Manufacturers will tell you it's getting heat from the outside air no matter how cold it is. That's true. What they don't tell you is there's a break even point and any temp below that is going to cost you more. You already noticed your heat pump is running continuously but what you didn't notice was the vent temp was changing. A heat pump will only run so long before the outside coil get's too cold and it switches to defrost/ac to warm that coil. Once the coil is warmed it will switch back to heat. The unit never stops but it is giving you warm air and then cold air then warm again. Some units automatically power up the heat strips every time it goes into defrost so you won't notice the vent temp change. Others just sense the temp drop and turn on the strips. Running heat and then ac costs more.
 
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JD Seller
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PostPosted: Tue Jan 02, 2018 11:11 am    Post subject: Re: OT/another heat pump question Reply to specific post Reply with quote

Nancy it sounds like your system is working like it should be. Your just not used to it. I would set the thermostat and forget it. The heat pumps advantage is it is a lower energy using system. So the recovery time is longer, example you turning it off and it taking 15-20 minutes to rewarm the house.

A gas or fuel oil furnace has way more heating capacity so you get hotter air out the ducts and faster recovery times BUT lower efficiency.

It really sounds like your system is install exactly right. Your about as cold as you ever get. It is keeping you warm without the heat strips kicking in. So it is running at 90% capacity but still keeping you warm. So the system does not have extra capacity to waste energy on when you have more normal temperatures.

James may have to do what we did in my Grandmother's house. She was always playing with the thermostat, up, down, and off. So we unhooked the thermostat she could get to. It still lit up but did not control the furnace. We put the "real" thermostat in a louvered door closet she never used. She still complained about how much she "HAD" to work the thermostat to keep the temperature where she wanted it. LOL Temperature recorder showed the furnace was working 100% correctly. Just an operator issue. LOL
 
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guido
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PostPosted: Tue Jan 02, 2018 3:01 pm    Post subject: Re: OT/another heat pump question Reply to specific post Reply with quote

Hello Nancy Howell,

Set the thermostat at your desired temp, monitor the room temp. Sounds like all is well, as the unit shut off at the preset temperature,

Guido.
 
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oleclint
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PostPosted: Tue Jan 02, 2018 7:07 pm    Post subject: Re: OT/another heat pump question Reply to specific post Reply with quote

We have a Carrier brand heat pump that is 23 yrs. old and has been very trouble free. The Guy that checks it over every fall said to shut the pump off when the outside temp gets to about 30*. Lower than that, the pump hardly ever shuts off.He said the 'strips' are more efficient that the pump running non stop. Our elect. bill is very reasonable. We are in located in middle of OK. clint
 
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