Airwell UC 104, Installation And Maintenance Manual

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This operation should be performed expertly by qualified
professionals (refrigeration engineer) (brazing, vacuum,
charge, etc ...).
The bending radius of the pipes should be equal to or more than 3,5 times de outside
diameter of the pipe.
REFRIGERATION PIPE BENDING
Do not bend the pipes consecutively more than three times and do not make more than
12 bends over the complete length of the link.
Unroll the pipes carefully, in the opposite direction to the
spirals, to avoid bending them.
TIGHTENING TORqUE FOR REFRIGERANT VALVES
FOLLOW THE CONNECTION INSTRUCTIONS FOR THE VALVES WITH NON-REMOVABLE
MEMBRANES
² Line up the 2 half couplings.
² Remove the protective plugs on each coupling.
² Check if the valves are greased on the inside; if not, lubricate them slightly with oil fit refrigeration
use.
² Give a few clockwise turns by hand, to make sure threading is engaged properly.
² Continue screwing clockwise with a wrench, while holding the rear part ( tube side ) with another
wrench placed counter-clockwise, until it is firmly tighten . Just then, resume locking with an additional
1/4 turn of the wrench.
² The reason for this last step is to crimp the internal metal gasket.
NOTE
² prior to final butt-screwing, a slight freon leak may be noticed which should stop quickly.
² proceed to leak tests.
² LIqUID:
(small valve) 15Nm
² SUCTION:
(large valve) 55Nm
1 Newton-meter = 0,1 meter-kilo
FOR SAFETY’S SAKE NEVER DISCONNECT
THESE COUPLINGS WHILE CIRCUIT IS UNDER REFRIGERANT PRESSURE
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