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  1. 02-03-2010, 08:03 PM #1
    navyhydronics's Avatar
    navyhydronics
    navyhydronics is offline Professional Member
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    Head pressure control

    Need a head pressure control for a trane TCD120C300AA.

    Also if anybody knows, what compressors come in this unit, because i discovered after i installed one, that there were two different sized compressors installed in this unit.
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  2. 02-04-2010, 07:41 PM #2
    hands
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    I would use a Johnson Controls / Penn Fan Cycling Control
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  3. 02-04-2010, 11:09 PM #3
    novato1
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    navyhydronics, check you email.
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  4. 02-10-2010, 10:16 PM #4
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    duke of earl
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    ICM 325
    It might get loud!
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  5. 02-11-2010, 07:36 AM #5
    Airmechanical
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    Quote Originally Posted by navyhydronics View Post
    Need a head pressure control for a trane TCD120C300AA.
    install a P-66 Johnson controller on it



    .
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  6. 02-11-2010, 06:15 PM #6
    trane_stud
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    I agree P-66 all the way.
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  7. 02-11-2010, 10:32 PM #7
    coolerinfrederick
    coolerinfrederick is offline Professional Member
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    i thought that trane rtu was good down to 0'F, no ?
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  8. 02-12-2010, 06:15 AM #8
    Airmechanical
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    Quote Originally Posted by coolerinfrederick View Post
    i thought that trane rtu was good down to 0'F, no ?
    your right, they do have ambient sensors, which will control the o.d. motor/s

    but they don't work off of pressure



    .
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  9. 02-12-2010, 04:54 PM #9
    jdcoolj
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    Does this unit have econimizers? Also coolerinfrederick is correct, this unit is ok to run mechanical cooling down to 0 degrees ambient without head pressure control.
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  10. 02-12-2010, 10:14 PM #10
    duke of earl's Avatar
    duke of earl
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    Sorry fellas but the condenser motors in this unit will not tolerate the P-66. Now the P-266 may be a different story. The ICM-325 is less expensive, has a hard start feature, and is suitable for sleeve bearing motor. The P-66 needs an open ball bearing motor which costs a fortune.
    It might get loud!
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