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Catalog OEM-1, Couplings / Page 23
Line-Set Field Installation Instructions
Step 1
Apply refrigerant oil to the entire sur-
face of diaphragm, o-ring, and threaded
area of male coupling assembly. The
amount of lubricant used must cover all
designated surfaces sufciently. Ideal
application is a small applicator brush
saturated with lubricant and applied
liberally. An alternate lubricant for this
application is a refrigerant compatible
silicone grease product like Dow Corning
DC200/60,000 cst.
Step 2
Ensure that the coupling halves are held
in proper alignment with each other prior
to starting the threads of the female
coupling nut onto the male half. The
coupling end faces should be parallel
with each other and visually in line
with each other, this allows the female
coupling nut to be easily threaded on
by hand for the initial 2-3 rotation of
the union nut. These initial rotations will
bring the diaphragm in contact and a
sharp increase in torque will be felt when
they come into contact.
If the nut will not start by hand, adjust
the position of the line set to ensure proper
coupling alignment and eliminate/mini-
mize all side-load force on the coupling
during assembly.
Step 3
Using appropriate size wrenches, refer-
ence table below for the female coupling
body and female union nut, tighten the
female union nut while preventing rota-
tion of the female body with respect to
the male half. The nut should be tightened
until a denite increase in resistance,
metal to metal contact occurs, is felt (at
this point, the nut will have covered most
of the threads on the male body). It is
important to ensure the male and female
coupling bodies
DO NOT ROTATE during
any portion of the wrench installation.
Step 4
Using a permanent marker or scribe,
mark a line lengthwise from the female
coupling union nut to either the bulkhead
or female coupling body. Then tighten an
additional one (1) wrench at (60°); refer
to the marking on the union nut to conrm
the rotation has occured. This nal rota-
tion is necessary to ensure the formation
of the leak-proof seal, between the male
and female couplings.
Step 5
Repeat step 1 through 4 for all connections.
Size
Designation
Torque Values Union
Nut Min-Max
Male Coupling
Hex Size
Female Coupling
Union Nut Hex Size
Female Coupling
Body Hex Size
Ft. Lbs N.m Inches mm Inches mm Inches mm
-06 10-12 13.5 - 16.2 3/4 19.05 13/16 17.46 5/8 15.87
-10 35-45 47.5 - 61.0 1-1/16 26.98 1-5/16 33.33 1 25.40
-11 35-45 47.5 - 61.0 1-1/8 28.57 1-5/16 46.55 1 25.40
-12 50-65 67.8 - 88.1 1-7/16 36.51 1-11/16 34.9 1-3/8 42.86