17
LEAK TESTING
It is of the utmost importance that a leak check be made on the 4 flare nut
connections. A leak however small will result in the aircon system loosing capacity
and endanger the compressor.
1. Use either soapy water or a proprietary leak test solution.
Paint on each flare nut (particularly the neck) and inspect carefully for any
telltail bubbles. Use a torch to improve visibility, particularly in the A/H area.
Any leak will generally be remedied by further tightening of the particular flare
nut.
In the event of a faulty flare, the line valves must be turned off, the A/H
pumped out and the flare remade.
2. Use an ELECTRONIC leak detector. Test initially on low sensitivity,
examining in particular the neck of each flarenut. Increase the sensitivity until
you are confident that no leak exists.
Install bituminous tape on 3/8” flare nuts
To avoid “sweating” and the dripping of water off the return gas line, with the
bituminous tape provided, wrap the
3
/8 flare nut at both the A/H and the Con/set.
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