Evening brothers, I’ve been strictly doing HVAC & Electrical work since 1997. I started my company in 2005. I’m Statewide Electrical licensed. Also I work on , install water cooled HVAC Systems for motor vessels. That being said, this has never happened to me before my vacuum pump or gauges was faulty and it pumped all my vacuum pump oil into the air conditioner system. I’m not above are too proud to ever ask anything or receive advice. So can somebody please give me a suggestion. I was going to print a new vacuum pump on it and pull a vacuum for like 24 hours after flushing with R11. Also, the customer ran the system for two days after I killed the breakers and told him not to. Any suggestions how to get this system back 100% also, it’s a brand new compressor and condenser coil on a Bard Unit
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HVAC questions
- Thread starter JCV
- Start date
luvtheheat
Well-known member
Your post is hard to understand and has a huge lack of meaningful details.
Good luck.
Good luck.
RalphInCA
Well-known member
That’s an understatement.Your post is hard to understand and has a huge lack of meaningful details.
Good luck.
Jim greengo
Well-known member
A vacuum pump pulls,it doesn't push in my experiance anyway.
How does it push oil back into a system?
How does it push oil back into a system?
American Locomotive
Well-known member
How do you know your vacuum pump oil pumped into the system? That should be pretty much impossible unless your vacuum pump like flipped over while you turned it off and the system was under a vacuum.
ratflinger
Well-known member
Remind me NOT to hire you.
pcmeiners
Well-known member
If a vacuum pump has no check valve built in or it malfunctions, mineral oil ladened vapor and any droplets around the interior intake area of the pump could easily back into a system in a vacuum state. Small contamination, but still contamination to synthetic oil.
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danski0224
Well-known member
Power failure or similar? I've read that the vacuum pump oil could be pulled into the system under some circumstances, but that actual outcome seems difficult at best.
Customer operated system, with service valves closed? Either impossible or damaged.
Operated without refrigerant? Impossible or damaged.
There's no way to remove the oil through evacuation.
Customer operated system, with service valves closed? Either impossible or damaged.
Operated without refrigerant? Impossible or damaged.
There's no way to remove the oil through evacuation.
Dagny
Well-known member
start over dump comp. flush everything.
So you'd rather hire what the majority of techs would do, pretend it didn't happen and just recharge it and hope you don't get called back to this customer?Remind me NOT to hire you.
Nothing wrong with someone trying to learn more. Seems like a scenario that doesn't happen a lot. But yeah, go ahead and be a **** to him.
fitter30
Well-known member
System under a deep vacuum pump stops from a power problem the system will pull oil from the pump. Industry standards pump gets valved off first then gets turned off.Remind me NOT to hire you.
fitter30
Well-known member
System in deep vacuum gauges open power problems oil can be sucked into system. What refrigerant,description of the system and how much oil?Evening brothers, I’ve been strictly doing HVAC & Electrical work since 1997. I started my company in 2005. I’m Statewide Electrical licensed. Also I work on , install water cooled HVAC Systems for motor vessels. That being said, this has never happened to me before my vacuum pump or gauges was faulty and it pumped all my vacuum pump oil into the air conditioner system. I’m not above are too proud to ever ask anything or receive advice. So can somebody please give me a suggestion. I was going to print a new vacuum pump on it and pull a vacuum for like 24 hours after flushing with R11. Also, the customer ran the system for two days after I killed the breakers and told him not to. Any suggestions how to get this system back 100% also, it’s a brand new compressor and condenser coil on a Bard Unit
pcmeiners
Well-known member
"System under a deep vacuum pump stops from a power problem the system will pull oil from the pump."
Have rebuilt 8 vacuum pumps, different brands, all vane type which are the usual pumps. All had the actual vane pump body basically in the middle of the housing, with an air space above, and above that the vacuum pump inlet. In vane pumps I rebuilt, the actual pump is not submerged in the oil, as the pump body must ***** air from above the oil level. Result, a vacuum could **** oil mist and a few small droplets of mineral oil if a check valve fails, in the upright position. As pointed out by American Locomotive, if a pump without a check valve or a failed check valve were to fall on it's side, and the pump powered off a considerable amount of oil could enter a vacuumed system. An overfilled pump will not pump at all, as the air inlet is blocked by oil, the pumps compression area fills with oil, oil is not compressible, pump stalls.
"start over dump comp. flush everything."
The entire system is contaminated with dirty mineral oil, the compressor, lines, filters. Flushing would need to be extensive ... new filters on both gas and liquid lines. Costly mess
Have rebuilt 8 vacuum pumps, different brands, all vane type which are the usual pumps. All had the actual vane pump body basically in the middle of the housing, with an air space above, and above that the vacuum pump inlet. In vane pumps I rebuilt, the actual pump is not submerged in the oil, as the pump body must ***** air from above the oil level. Result, a vacuum could **** oil mist and a few small droplets of mineral oil if a check valve fails, in the upright position. As pointed out by American Locomotive, if a pump without a check valve or a failed check valve were to fall on it's side, and the pump powered off a considerable amount of oil could enter a vacuumed system. An overfilled pump will not pump at all, as the air inlet is blocked by oil, the pumps compression area fills with oil, oil is not compressible, pump stalls.
"start over dump comp. flush everything."
The entire system is contaminated with dirty mineral oil, the compressor, lines, filters. Flushing would need to be extensive ... new filters on both gas and liquid lines. Costly mess
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Notgrownup
Well-known member
Bang his wife. Then pull vacuum