Leak Checking Low Pressure Chiller CVHE

[Nuclrchiller]

Is that for real, tell me that's just a joke!

Sent from my SM-G950U using Tapatalk

I was told this by my service manager early in my career. About 33 years ago. A customer's maintenance staff did this, sometime in the past.

[Nuclrchiller]

I think I remember Healey having a similar occurrence in his area.

[JeffWil]

Well that's really lettin the magic smoke out there

Sent from my XT1710-02 using Tapatalk

[Healey Nut]

I think I remember Healey having a similar occurrence in his area.

You are correct . I was told by an old timer Trane guy that they had a propane fork lift hooked up to the back of the motor and were trying to yank the sucker out without going in the front end first . Chiller ended up in the dump , and the fork lift needed new tires

[JCN]

You are correct . I was told by an old timer Trane guy that they had a propane fork lift hooked up to the back of the motor and were trying to yank the sucker out without going in the front end first . Chiller ended up in the dump , and the fork lift needed new tires

That is NUTS!!!! You just can't fix stupid.

[chillerguru]

Reminds me of the days of leak checking r113 chillers low on charges, sometimes you’ll be lucky to hit 2psi. That’s circulating hot water 130 degrees.


Sent from my iPhone using Tapatalk

[Nuclrchiller]

Reminds me of the days of leak checking r113 chillers low on charges, sometimes you’ll be lucky to hit 2psi. That’s circulating hot water 130 degrees.


Sent from my iPhone using Tapatalk

Those days were so far back for us that we used Nitrogen, lol!

[chiller guru]

Step away from the chiller 😂😂

[Keepitcool1]

when circulating your water make sure it's vented so it does not pressurize

[PREVAC]

I am trying to leak check a Trane CVHE (low side leak) I started by draining the evaporator barrel. Valved off water in water out. I filled evaporator barrel with 114°F water. I still can't get my pressure up passed 0 psig. So I drained the Condenser and also filled it with 114°F water. The UCP is reading 2 psig, but my gauge that is hooked to the evaporator is still reading 0. Another thing that is confusing me is I still have liquid refrigerant coming out the top of the evaporator.

I'm sure you figured out this problem by now, but are you aware of the product PREVAC that prevents air and moisture from entering the chiller when idle? It also has push button leak testing for servicing. Want me to send you some information?

[SanchezHVAC]

I'm sure you figured out this problem by now, but are you aware of the product PREVAC that prevents air and moisture from entering the chiller when idle? It also has push button leak testing for servicing. Want me to send you some information?

Yea this job is complete. Yea go ahead and send me that info, it never hurts to get new info.

[valdelocc]

I'm sure you figured out this problem by now, but are you aware of the product PREVAC that prevents air and moisture from entering the chiller when idle? It also has push button leak testing for servicing. Want me to send you some information?

Do you work for prevac? I have questions about the pressure transducer for r123, whats the output? 0 to 5V, 4 to 20...? and whats the pressure range? thanks

[PREVAC]

Do you work for prevac? I have questions about the pressure transducer for r123, whats the output? 0 to 5V, 4 to 20...? and whats the pressure range? thanks

Yes I do. The output on the pressure transducer is 4-20 milliamps. The pressure range is 30" of vacuum (-15 psig) to 15 psig. Do you do a lot of work with low pressure chillers?

[valdelocc]

Yes I do. The output on the pressure transducer is 4-20 milliamps. The pressure range is 30" of vacuum (-15 psig) to 15 psig. Do you do a lot of work with low pressure chillers?

Thanks! I work on low pressure machines here and there.
I removed a PreVac setup from a decommissioned chiller and I going to mount it on a hand cart, make it portable and use it for leak checking, the only thing missing was the transducer.

[PREVAC]

Does it have a 4 wire connection or a 2 wire connection for the pressure transducer?

[brett2008]

BennyD

You should have gone with your gut.

Potentially 90 % of leaks are found on either economizer flange at bottom of evap or suction elbow to evap due to rust etc

Sent from my SM-G965F using Tapatalk

[BennyD]

BennyD

You should have gone with your gut.

Potentially 90 % of leaks are found on either economizer flange at bottom of evap or suction elbow to evap due to rust etc

Sent from my SM-G965F using Tapatalk

I know......