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    • 30 March 2024 02:00 PM Until 03:00 PM
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      All Appliantology tech members are invited to join in this workshop on all things Appliantological: bidness, customers, tools, troubleshooting, flavorite brewski, whatever. Webcams and microphones are open and live!
      This workshop is also a great time for any students at Master Samurai Tech to bring any and all questions about the coursework. We're happy to walk through any concepts you're having trouble with. Think of it like office hours with your teachers. 
      If you have a specific appliance problem you'd like us to talk about, post it here! We need a problem statement and a PDF of the tech sheet or schematic so we can all see it on screen share. If you have a PDF that isn't already in the File library here at Appliantology, send it to us by attaching it to the contact form. 
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      Who: This workshop is only available to tech members at Appliantology.
      When: Saturday, March 30 @10:00 AM Eastern Time.
      Where: Online via Zoom
      How:
      Click here to go to the forum topic with the registration link. If you're interested, register now. Arrive a couple minutes early to make sure your connection is working. Set a reminder for yourself for this workshop so you don’t miss it.  And check out past workshops here: https://appliantology.org/announcement/33-webinar-recordings-index-page/

Used refrigerant manifolds


FronteraRepairs

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FronteraRepairs

A friend offered me a manifold but the high red colored side is not exactly calibrated. It shows like 10 or 20 PSI. The Blue low pressure guage is right on the money "0".
 

My question being, for typical residential fridge repair and maybe small window A/C, is the high side going to screw me up? Or am I going to depend mostly on the low side for accuracy?
thanks

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I can't common on ALL manifolds, but most will have a calibration adjustment. Remove the cover lens and use a screwdriver to dial in the gauge. The rubber seals on the ends of the hoses can be replaced if worn.

Not often I use high side, but sometimes it is necessary, especially when there is a possible partial restriction.

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FronteraRepairs

Thanks for the heads up. I'll keep an eye out fo that adjustment screw!

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You should calibrate them by a known refrigerant pressure and temperature, not just by atmospheric pressure.

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You can buy new gauges from a supplier like Johnstone for around $25.00 each.The more correct information you have will always help you make better decisions and assessments of a unit's condition. What refrigerants do you plan to be working with? I have a manifold gauge set dedicated to r134a, one for 410a and another for R22 and the odd 414a/b (R12 replacements) job i do. 

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