Question about Whirlwind FH-778 Air Conditioner

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I am replacing my central A C. with a new one. I worked on Autos for 50 yrs. have guages. Do I Screw the Allen Plug in on the high side, run the compressor, then screw in the low side. to keep the r-22 in the condenser, and desolder the lines.

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By George, you've got it.Front seat (screw in) the high side and run the unit. Do not let it pull into a vacuum as this will allow air to be sucked into the system when you open it. Also, watch you high side gage. Don't go over 400 psi. This is usually the High pressure cut out setting on most safeties. Pull low side to about 2-3 psi and kill unit. Let sit for about 5 minutes and then run it again back down to 2-3 psi. Front seat the low side any you should be good to go.
I strongly suggest that you add a filter/dryer to the system. It's good practice to do so once the system has been open. If you are going back with a 410-a system, don't leave it open to the atmosphere for more than 15 minutes. That is, the condensing unit. The only way to remove moisture from the oil on this system is to use filter/dryers. You can not vacuum it out like in the old days with R-12.

Good luck and hope this is what you are looking for.

Posted on Jun 27, 2009

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Safety: goggles, gloves, long sleeves (to avoid burns), engine cooled, battery disconnected, leave key out of ignition, block wheels so the truck does not move.

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OK, admitedly I'm a dummy when working on autos.

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Why do you need to check it as it is a sealed unit and as per jaguar does not need to be checked so they say.......

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well this is how i do it,,,,ive done it over 300 times and never had a issue this way,,,,with the car off,remove the big drain plug on the bottom of the trans,,its either a 24mm or 27mm,let it all run out,,it will most likely be black,,then put the plug in and dump 8 quarts in or 2 gallons,,,,let it run and run it thru the gears,,,put in park and remove the smaller allen head screw inside the big drain plug,i think its a 5mm allen and let it run out of there til its not a steady stream anymore,then put the plug back in and clean off the drain plug area,,put 1 quart in the car and youre done,,,,,,the fill; cap is a screw on black cap near the back top of the drivers side down under there,,,,remember this takes CVT VTI fluid ONLY,,its light green in color DO NOT use RED ATF,,,,

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I hate to answer a question with a question but why do you need to check it as it is a sealed unit and as per jaguar does not need to be checked so they say.......

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