HVAC recovery system hook-up and hose purge

I show how to connect and purge hoses when recovering refrigerant from an a/c system.

Please do not be confused by the R-410A gauges. My R-22 gauges were broken and I was forced to use my R-410A gauges.

Category:

Howto & Style

Tags:

• DrZarkloff
• Starkloff
• HVAC/R
• betterthanbob
• air
• conditioning
• HVAC
• recovery
• unit
• hose
• purge

[mayhew23451]

so just charge all package units to required amount of refrigerant dont go by sub cool and superheat

[DrZarkloff]

@mayhew23451 Exactly. You wouldn't believe how hard it is to convince new techs of this.

[dendog21]

I'm learning refrigeration repair for the company I work for. We refurbish used Soft serve ice cream machines. We rebuild water cooled and air cooled units. When pressure is highor low in the water cooled unit we adjust the water valve to achieve pressure but in the air cooled units I'm unsure of what to do to get the right pressure. I don't know how to adjust it if its even possible. Blower works fine and condenser is clean

[DrZarkloff]

@dendog21 It's important to have the correct amount of charge in the system to be sure that the subcooling off the condensing coil is at the manufactures specs.

[dianemarie909]

why does the scale count backwards when you are charging semi hermetic cop

[DrZarkloff]

@dianemarie909 The scale could count backwards if you don't press the tare button before charging.

[snollic]

@DrZarkloff /subcool



[snollic]

@DrZarkloff why not with super heat you could over or under charge, depending on the line sets length

[dwarfcar76]

@5NOOPY615 Initially it will not make a difference. Most companies are going to assume that you know "Just enough to be dangerous", thats why they want 2-5 years of field experience.

[dwarfcar76]

I don't agree with the initial purging technique's.

[dwarfcar76]

@dianemarie909 The scale will more than likely always read negative since the tank is being weighed backwards. Its being weighed by weight loss, not weight gain.