line size ?

sspeedster37

Obviously I canpump down a system. I just wanted to make sure i was able to pump it down as best as possible without causing harm to the system. The pumpdown isnt hard maybe i can have some of ur money go buy what i need to do the job and prevent some dumbass residential service tech from most of the ac companies of screwing over another person, especially a friend. Everybody know that at best there might be 10% of service tech worth anything. And my bad for not knowing everything in the world. That is why I came to the site to learn and benefit from others knowledge instead of the wish her well technique

hvaclover

One thing about hvac, you gotta have common sense. You didn't own what you needed to do the job as you said.

So here's an idea: ask your boss to use the tools he provides you with.

JEEZe...

__________________
Not Stupid, Just slow

gene2

What?, no CO2 involved?

Best to Follow manufacturers instructions. Clover knows what I mean.

hvaclover

he can use CO2 when he corrects that 5/8 suction line.

__________________
Not Stupid, Just slow

mechanicalDvr

You don't sound like you can when you post " Do you go by suction pressure or by the sound of the compressor?" I have known hungreds of techs over the years and don't know any that can tell a condenser is pumped down by listening to the compressor run.

hvaclover

Sure he can All you gotta do is wait for the grinding sound of failed valves
and you're done...and how!

__________________
Not Stupid, Just slow

coolmen

mechanicalDvr

Sorry I thought he was pumping it down to do a repair not replace the unit.

beenthere

A side job.

Don't forget while your doing your side jobs. EPA requires you to have available to you, a recovery system.

You now have a heat pump installed that its hot gas line changes sizes.
Makes for interesting situations in heating mode.


While tools and service equipmet are expensive.
Its best not to tackle any job that you don't have the tools that you should.

__________________
How many times must one fix something before it is fixed?

mechanicalDvr

So many guys do side jobs until they end up in court. It just isn't worth the money when that happens.

Tony Pullen

hey...I gotta agree with "clover"...pump down is hvac 101!! you learn it right after you learn about the Montreal Protocol! That having been said, if this is on a mobile home and it is one of those "God forsaken" quick connects, then it has no service valves and therefore can't be pumped down. But the previous poster is right...epa REQUIRES you to own a recovery unit if you service any type of refrigeration system.

Vaporx

Vapor line sizing is a compromise between oil return and capacity loss. If you look at enough line sizing charts, the conclusion is 410A systems can tolerate smaller ID's than 22 systems...

Worst case scenario for your situation would be some capacity loss with the 5/8ths...but for 30 feet or so and 2 tons, it will be negligible, if any.