410-a a good conductor of electricity?

[ryan1088]

That is crazy. Never heard of or noticed that before!

[supertek65]

cus you are one of those weirdos that works in the light!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

That is crazy. Never heard of or noticed that before!

[supertek65]

interesting!
i was not using a scale, charging about 150# 410a as a liquid of course and I had the bottle upside down on the steel I beams we put the chiller on!
steel i beams would be a pretty good ground!

that is why I asked how much refrigerant you were charging.

I've never worked on a 30rb machine so I don't know if you're talking a couple pounds, a couple jugs or a couple tons.

As fluid flows, it can generate a static charge.

I was pulling some gas from a rack on a roof one day. Only a hundred pounds or so, but the 125# tank was sitting on a rubber roof, my manifold was NOT grounded nor was the tank.

It only took about 2 minutes to build a noticeable 'zip' when you touched the tank. If you let it go much longer, the shock was almost painful.

I've seen it happen before, but this was the worst I can remember.

[supertek65]

wow!

never heard of anything like this???

YES it would ZAP you!!!!!!!!!!

That happened to me before, it even killed my scale one time! I was dumping liquid into a system in a vacuum and all of a sudden I started hearing sparking.. I touched my manifold and got shocked, then i heard a big zap and the screen on my scale went blank..

From then on I usually attach a wire from the tank to the unit or some metal to keep it grounded. I do get some little shocks here and there from it, but never that bad again.

[ryan1088]

cus you are one of those weirdos that works in the light!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

You call me a weirdo, I call myself smart.

[supertek65]

me too!!!!!!!!!!!!!!!

but i do not think this happens in Canada!!!!!!!!!!!!!!! LOL!!!!!!!!!!

Learn something new everyday

[supertek65]

guess I should have asked jim bergman?

how did you find that?

[supertek65]

I must agree!

You call me a weirdo, I call myself smart.

[supertek65]

[jpsmith1cm]

guess I should have asked jim bergman?

how did you find that?

I remember it being posted here a while back. Couple years, at least.

I went to Jim's YouTube channel and dug back for it.

It stuck out because I'd not heard of or considered the possibility of it until then.

IIRC, it was around the time the the Testo 550 was released and they were being fried by this same static build-up.

[supertek65]

guess i should have read the instructions??




Charging Instructions
1. Operate the system for 24-hours and record temperature and pressures of unit operation. Inspect the system, make any required repairs and perform routine maintenance before charging with HC Refrigerant.
2. Existing refrigerants may need to be removed and reclaimed by qualified personnel. The weight of the recovered refrigerant should be recorded. Local regulations may vary by region and the technician should be aware of all applicable requirements.
3. Perform a system vacuum and confirm that system does not leak.
4. Connect liquid valve from cylinder to gauge manifold. Make sure the charging lines are clean and purged.
5. Connect manifold equipment to the low-pressure side of system. Ensure all components have been properly grounded. When charging a large system, the charging equipment, hoses, and system must be grounded to stop a build-up of static electricity.6. When all connections have been made, insure there are no leaks before continuing.
7. Partially closing the suction service valve will reduce the flow from the regular evaporators and speed the transfer of refrigerant from the charging cylinder to the system.
8. Using the weight of the recovered refrigerant, or the system specifications, the weight of HC-22a® or HC-502a® required will be approximately 40-42% of the weight of the recovered CFC or HCFC refrigerant.
9. After verifying that pressures and temperatures are correct, remove the charging equipment and attach the HC System label (provided) to the system in a prominent area

[supertek65]

this could be dangerous, depending on where you are working!

I remember it being posted here a while back. Couple years, at least.

I went to Jim's YouTube channel and dug back for it.

It stuck out because I'd not heard of or considered the possibility of it until then.

IIRC, it was around the time the the Testo 550 was released and they were being fried by this same static build-up.

[Freightshaker]

If you vacuum up fine powder you can do it with a shopvac also. I have been blasted by some recovery drums before. Definitely heard of zapping scale displays.
If I'm thinking clear this is also a problem when plastic pellets are moved with a blower.