Question on Nitrogen test requirements

My manufacturer (Pioneer) does not mention the nitrogen test in its install manual, but as referenced below, a longer install video says the pressure can be different for the inside unit than the outside, so he recommends 300 PSI for all mini-splits.

It is these kinds of questions that are not spec'd in the manual that make doing this the first time so hard. I guess this is one reason a lot of guys apprentice. I do like the tip of doing smaller PSI tests first.

So, when you say this "I leave the liquid port loose and start the nitrogen flow till I hear it hiss at the valve, shut off the nitrogen and then torque the liquid line to spec. This takes very little gas and is unprofessional but I now know I have an open system."

The lines are empty, so this way you also know you are filling the whole line set, not just the hose. I just saw a message a from a DIY who said when he did the vacuum he forgot to open the lineset, so he just vacuumed his hose.

THOSE are the things that are logical, but potential pitfalls for people who have never done it.

This recommended longer install video is good because he does mention every small step he does along the way.

For more information, please visit Miniature Bulk Tank For Liquid Gas.

Thanks for the info on where to get nitrogen. I did watch the triple evac video - understood.My manufacturer (Pioneer) does not mention the nitrogen test in its install manual, but as referenced below, a longer install video says the pressure can be different for the inside unit than the outside, so he recommends 300 PSI for all mini-splits.It is these kinds of questions that are not spec'd in the manual that make doing this the first time so hard. I guess this is one reason a lot of guys apprentice. I do like the tip of doing smaller PSI tests first.So, when you say this "I leave the liquid port loose and start the nitrogen flow till I hear it hiss at the valve, shut off the nitrogen and then torque the liquid line to spec. This takes very little gas and is unprofessional but I now know I have an open system."The lines are empty, so this way you also know you are filling the whole line set, not just the hose. I just saw a message a from a DIY who said when he did the vacuum he forgot to open the lineset, so he just vacuumed his hose.THOSE are the things that are logical, but potential pitfalls for people who have never done it.This recommended longer install video is good because he does mention every small step he does along the way.

Beverage Systems (EMEAI)

Chart's beverage carbonation systems are a reliable cost-effective alternative to high pressure systems. Our solutions for the industry extend to carbon capture, nitrogen dosing and water treatment.

Eliminating Fugitive Methane Emissions

The Kathairos Solution works with Chart's MicroBulk system to provide a continuous, unattended supply of nitrogen for pneumatic devices at off-grid oil and gas facilities.

If you want to learn more, please visit our website Liquid Argon Low-Temperature Storage Tank.

Additional reading:
Unlocking the Potential of Phenol Alkylation Plants

Euro-Cyl

All purpose liquid gas transport, storage and supply vessels for laboratories, hospitals, universities and other low pressure users. Manufactured in Europe according to TPED. Gross capacity from 120 to litres.

MicroBulk CO2 Applications & Storage Systems

The Perma-Max MicroBulk Storage Systems are specifically designed for CO2 service. US manufacture & specifications.

MicroBulk Distribution System

Products manufactured in Europe for EMEAI regions.

MicroBulk Systems Bifold-Europe (German)

If you are looking for more details, kindly visit 3m³ Liquid Argon Cryogenic Storage Tank.