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r
2-6
efrIgeratIon
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 easily be threaded on by hand
for the initial 2-3 rotations 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 and start to
pierce the diaphragms on each coupling half.
If the nut will not start by hand, adjust the
position of the line set to ensure proper
coupling alignment and eliminate/minimize all
side load force on the coupling during assembly.
Step 3:
Using appropriate size wrenches, reference
table below for the female coupling body and
female union nut, tighten the female union
nut, according to the torque specs below, while
preventing rotation of the female body with
respect to the male half. The nut should be
tightened until a definite 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.
P/N 0520677_W
/e
/C
leCtrICal
ontroller
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM
Coupling
3
/
in. Male
8
3
/
in. Female
8
5
/
in. Male
8
5
/
in. Female
8
Coupling
Size
/
in.
3
8
/
in.
5
8
IMPORTANT!
Tighten swivel fitting until the fitting has
significant resistance (fittings bottoming out).
Apply ¼ turn past the resistance. Ensure no
threads are visable.
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 flat (60°); refer to the marking on the
union nut to confirm the rotation has occurred
The final rotation is necessary to ensure the
formation of the leak-proof seal, between the
male and female couplings.
Hex Wrench
Size
3
/
in.
4
13
/
in.
16
1
1
/
in.
16
1
5
/
in.
16
Foot Pounds
(Ft. Lbs.)
10-12
35-45
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