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Thread: Trane heater

  1. #14
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    2,119
    I believe the oil tank was relocated to the floor about 10 years ago. My records show a CVHF049 with serial # L01DXXX that had oil tank on floor and had (I think)UCPII panel. If Joey"s oil tank is on floor, then it won't have that solenoid valve.

  2. #15
    Join Date
    Aug 2009
    Posts
    47
    Alot of times on the black panel cvhe's instead of the vent line solenoid, they have made a big upside down trap. Out of the suction cover straight up above the volutes cross over and come back down to the oil sump. The line was also increased to 1 1/8 from 7/8. I'm pretty sure that was for less velocity coming back to the suction cover.

  3. #16
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    2,119
    Yeah, the classic black panel cvhe had several variations on the oil tank vent line. It being the origional version of the current chiller, it left the factory with a setup that did not always work as a "one size fits all". It may have worked fine in a test lab, but under field conditions, sometimes it was a major source of problems. Any Trane tech from the 80's can tell you that. Thems was dark days. Very frustrating. But the factory kept at it. Between trial and error at the factory and in the field (not to mention some very patient customers) solutions were found. I say solutions (plural) because once a particular chiller was made to work, it was left with that vent line configuration. And then we would try that fix on the next chiller and it wouldn't work on that one, so another fix would have to be engineered. That's why when you walk up on a classic black panel cvhe you don't know what oil vent line is on it until you see it. It may be vented to evaporator side of vanes or the compressor side of vanes. It may or may not have a solenoid valve. It may have two valves in parallel. It may have a valve with manually adjustable minimum position. It may have manual angle valve. There may be others I have forgotten or never seen. And also, I believe the reason for the increase in vent line size is to allow for greater flow volume, particularily after field installation of an evaporator oil return which was not a factory item until the introduction of the UCPII. The additional refrigerant dumped into the oil tank would flash to vapor and raise the pressure (or decrease the vacuum) to the point that the oil would not drain from the bearing cavities and result in (sometimes rapid) oil loss.

  4. #17
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    2,119
    Like it's been said, check vent line solenoid (if it has one) and check oil tank heater. Be aware later style heaters look like a simple element heater, when they are in fact multiple elements wired in parallel inside the ...uh... rod (for lack of a better word). So if one element fails it looks like the heater is working. But at reduced heat output.

  5. #18
    Join Date
    Jul 2010
    Posts
    59
    the oil sump is on the bottom of the chiller on the floor and it has two drain lines coming from the motor that don't have solenoids on them.

  6. #19
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,093
    Sump on the floor no vent line solonoid .
    That being said ...if you keep the chiller tight you dont need the prevac ....except for leak testing .
    Whats the amp draw of the heater ??
    The toy chest is officially full ... I got a new toy..... 2007 Aston Martin V8 Vantage
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

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