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Thanks to all you for your input it is very helpful.

I'm going to try the Fluke 376 or 902, I currently have a Fluke 30 so I'm comfortable with it.

Thank so much

Removed sorry no *

Gary makes an important point you are using cfm you have to look at mass flow in #/min

Strkout

I saw where it has the hold but does it hold max hold like when checking peak LRA?

Hey I'm at 41 years and the only thing I know for sure is the more I learn the more there is to learn.

In the field there are many things like instrument error that can make not add up.

:grin2:...

What are some good meters that will lock in peak amps?

It does for resistive loads the CCH is resistive.

You are right that it will not work with capacitive or inductive loads.

Better to eat crow with us than the customer! They make you eat the feathers too.

Your doing what you should staying with the problem, I bet they will understand

Yea I agree.

Sometimes you can add a little AB lubricant and it will help bring oil back

If you google copeland AE 4-1312 then go the list of CCH for described scroll comp.

They are heater wire not solid state in this range size.

You might be waiting a while for them to get back. ...

I don't know about Copeland but Genetron R422C says it will work with MO AB or POE lubricants, hence no oil change.

My experience tells me that the AB will have fewer oil return problems in your...

Most of those heaters I've seen about 70 watts (with comp # we can find out exactly) with 230V that wold be about 0.3 amps. Hard to read.

To get more accurate reading you can loop wire five times...

Are you saying you have less superheat after the heat exchanger? Colder at the outlet of heat exchanger than the inlet?

If that comp had mineral oil and you put r401 without changing to alky oil I bet comp seizing up.

As a last ditch effort you might try some Supco 88, sometimes it works sometimes not.

While you have that valve plate off you want to check piston and bore for wear and damage, if it is air cooled (no oil pump) you will need to check the wrist pin too.

When you drop a suction valve...

FYI to all regarding CM Exam, Jayson Goff will be presenting a CM Prep Session at the RSES Conference next week (11-14-2012 to 11-16-2012).

There will be a lot of other educational stuff going on...

Installing a systematic leak detection system will help and i guarantee you it will pay for its self. But like jp says you gotta fix the leaks.

If the store is r22 and has a high concentration...

now your talking Mike

That is a good point if you make everything up ahead of time you could prob change real quick.

Most of those nozzles are removable, i wont say easily though, if it is corroded in it could be tough.

Mikeacman that was meant for Mrak you all were talking about all kind of misspelled stuff your post 14 I think, I sure don't cast stones cause I'm the worst.

I did think it was interesting how our...

Another point is if system was charged during the summer they may not have put enough in to flood the condenser during lower ambients when the OROA (or LAV) valve comes into play it will loose liquid...

Are we still talking about Mrak's unit? I'm confused but that dont take much.

Does that unit have hot gas bypass

As josey Whales would "say I recon so"

Doing some amazing things




I cdnuolt blveiee taht I cluod aulaclty uesdnatnrd waht I was rdanieg. The phaonmneal pweor of the hmuan mnid aoccdrnig to rscheearch at Cmabrigde Uinervtisy, it...