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    pedro10's Avatar
    pedro10 Posts: 11, Reputation: 1
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    #1

    Aug 2, 2010, 11:04 AM
    Should I run my a/c blower motor on high
    I have a trane 1200xe model 048 something. I have a problem keeping the temp during the day. I have it set up for 78 and after 4:30 to 75 it seems to be running all day.The temp starts to come down after 9:00. My house is about 1900 to 2000 sqr feet.
    I cleaned the outside unit and the inside unit. It does not get frozen. Should I have a bigger unit.
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    pedro10 Posts: 11, Reputation: 1
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    #2

    Aug 2, 2010, 11:40 AM
    I have a trane 1200xe model 048p. My house is 1900 to 2000 sqr ft. My a/c seems to run all day without turning off during the day. I have it set a 78 during the day and 75 after 4 pm and 70 after 8:30 but it seems to take a long time to reach those temps. After 9 it seems to start coming down. Should I change the speed on the motor or will that damage something. Also do you think a have enough tonage.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #3

    Aug 2, 2010, 12:10 PM

    Can you measure the temp. of the air from supply vents?
    Then try speeding up the blower and check the temp again,which is colder?

    Unless you have some abnormal heat/cooling loss,like not enough insulation,single pane windows,doors open too much,the tonage sounds about right,was a manual J calculation done when equipment was installed?
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    #4

    Aug 2, 2010, 12:23 PM

    I will check the temp from air supply but now that you mentioned it I do need more insulation in some areas of the house. I believe the calculation was done but I also added another room. I have five rooms and about 11 windows.
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    wmproop Posts: 3,749, Reputation: 91
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    #5

    Aug 2, 2010, 02:18 PM

    Adding the extra room after the ac was installed and after the scheduel J was don can put everything out of sink
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    #6

    Aug 3, 2010, 01:44 PM

    I have trane 1200xe model # twe048p13fao 1/2 hp. I would like to make it work on high speed. The motors has two wires blue and red. The blue is connected to the letter a and the red to letter b. There is a third letter c nothing is connected. I know the a is low b is med and c is high. Can you tell me which wires go where.
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    pedro10 Posts: 11, Reputation: 1
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    #7

    Aug 4, 2010, 11:11 AM

    I checked my a/c pressure low side 75 psi and my high side is at 230 is that normal or does it need more gas. It's a york .
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    wmproop Posts: 3,749, Reputation: 91
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    #8

    Aug 4, 2010, 11:38 AM

    Not knowing the outside temps, but sounds about right
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #9

    Aug 4, 2010, 02:17 PM

    That is a 12 seer 4 ton unit in a 1900-2000 sq ft house? Even in a hot & humid climate that is over sized.

    I wouldn't run a program for cooling, the reason is when you let the house warm up the humidity also increases then when the temperature comes down in the evening the system works harder to dehumidify the air before it starts cooling efficiently again, thus losing the majority of any electrical savings you may have gained.

    Still waiting for the temperature split to be posted.

    We also need the furnace model number to know what speed is appropriate, you need 1600 cfm for the system to work properly. Also, just because the blower data says use high speed, duct design, closing to many registers, air filters and dirty coils can all significantly drive down the units capacity to cool.
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    pedro10 Posts: 11, Reputation: 1
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    #10

    Aug 5, 2010, 07:36 PM
    Quote Originally Posted by NorthernHeat View Post
    That is a 12 seer 4 ton unit in a 1900-2000 sq ft house? Even in a hot & humid climate that is over sized.

    I wouldn't run a program for cooling, the reason is when you let the house warm up the humidity also increases then when the temperature comes down in the evening the system works harder to dehumidify the air before it starts cooling efficiently again, thus loosing the majority of any electrical savings you may have gained.

    Still waiting for the temperature split to be posted.

    We also need the furnace model number to know what speed is appropriate, you need 1600 cfm for the system to work properly. Also, just because the blower data says use high speed, duct design, closing to many registers, air filters and dirty coils can all significantly drive down the units capacity to cool.
    If by furnace you mean heater the model # is bay96x141002.
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    pedro10 Posts: 11, Reputation: 1
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    #11

    Aug 5, 2010, 07:52 PM
    If by furnace you mean heater the model # is bay96x141002. Should I keep the house colder than 78 during the day?
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    #12

    Aug 6, 2010, 05:05 AM

    THe furnace model # is bay96x141002. Should I keep the temp below 78 during the day so the house won't get that hot.
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    #13

    Aug 6, 2010, 07:27 AM

    Yes
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