12
WAECO USA, Inc.
Tel. (860) 664-4911 • Fax. (860) 664-4912 • www.waecousa.com
Contents, specifications and availability are subject to change without notice.
STEP-BY-STEP:
ASSEMBLING THE ONESHOT COUPLINGS
COUPLINGS MUST BE IMMACULATELY CLEAN
—
Leaving plastic caps and plugs in place,
carefully wipe off
the fittings to remove dirt, dust and moisture. Now remove the
plastic caps from the refrigerant couplings on the compressor
unit, and from the mating refrigerant couplings at the end of
the tube set.
Don’t touch the brass hex dome nuts on the
side ports of the evaporator couplings! They are there for
possible future servicing only.
CONNECT THE LOWER REFRIGERANT COUPLING FIRST
— Thread the coupling halves together by hand to ensure proper
mating of the threads. When screwing the male and female
halves together, align them carefully to avoid strain and cross
threading. If you have difficulty aligning the coupling halves
properly, it may be necessary to temporarily shift the
compressor unit for better alignment.
TURN ONLY THE FREE-TURNING PART OF THE FEMALE
COUPLING
— Do not try to turn the male coupling. Just hold it with your 5/8”
wrench.
If the male coupling is twisted from its copper tubing,
there will be a refrigerant leak (that is why 2 wrenches must
be used).
— Using the 5/8” wrench on the male coupling body hex and the
13/16” wrench on the female coupling (holding the male
coupling hex stationary), tighten (CW/Clockwise) the female
until the coupling halves bottom out and strong resistance is
felt.
THIS WILL REQUIRE ABOUT 6 FULL TURNS.
— Work rapidly to minimize any possible escape of refrigerant
past the temporary rubber O-ring seal (it is inside the male
coupling). Occasionally there may be a slight “hiss” and/or a
drop or two of refrigerant oil when making these connections.
Don’t stop if this happens—just continue until the couplings
feel very tight. The final seal is metal-to-metal).
FINAL TIGHTENING
—
This step must be performed correctly or a permanent
leak-proof joint will not be achieved.
— Using a marker pen, draw a line from the male coupling body
to and over the female coupling as a reference. Tighten the
female coupling
one more 1/4 turn
while holding the male
coupling hex stationary. This 1/4 turn is essential to ensure
that the final metal-to-metal seal is completed, forming a
permanently leak-proof joint.
FINAL TORQUE
Coupling Torque required: 12 to 14 foot pounds (16.3 to 19.1
newton / meters). Imagine a 14 pound weight at the end of a
one-foot wrench)
EXCEPT for the small PowerPlate-to-tube set
couplings which require 10–15 ft lbs. See the PowerPlate section
in your manual.
If your final 1/4 turn did not require this much torque, your
couplings are still loose. TO REPEAT: The 1/4 turn starts after
the couplings are already very tight.
Now connect the upper set of couplings.
— Same procedure except: the male coupling is held securely by
its support bracket, so you do not have to use 2 wrenches.
— Save the plastic caps in the event the unit ever needs to be
uninstalled and returned for service.