Head pressure control

[navyhydronics]

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.

[hands]

I would use a Johnson Controls / Penn Fan Cycling Control

[novato1]

navyhydronics, check you email.

[duke of earl]

ICM 325

[Airmechanical]

Need a head pressure control for a trane TCD120C300AA.

install a P-66 Johnson controller on it



.

[trane_stud]

I agree P-66 all the way.

[coolerinfrederick]

i thought that trane rtu was good down to 0'F, no ?

[Airmechanical]

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



.

[jdcoolj]

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.

[duke of earl]

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.