Connecting Condenser Line Couplings - H.C Duke & Son Freedom 360 Degrees Series Operator’s Manual With Illustrated Parts List

INSTALLATION AND SERVICE MANUAL 917N-CMT, 927CMT, 957CMT
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6.2.1 Connecting Condenser Line Couplings

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The refrigerant couplings that connect at
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 the freezer and condenser eliminate the
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need for initial field charging. The coupling
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design prevents air inclusion and refriger-
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ant loss during connection. Follow these
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installation procedures to insure leakproof
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connections.
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1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 1. Remove protector caps and plugs and
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2. Lubricate male half diaphragm and
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3. Thread the coupling halves together
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4. Using a pencil or marker, mark a line
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5. After connecting the condenser line
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6. Inspect all refrigerant tubing connec-
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184617-02
examine the couplings for dirt or
foreign material. If necessary, care-
fully wipe coupling seats and threads
with a clean, dry cloth.
synthetic rubber seal with POE
refrigerant oil.
by hand to insure proper mating of
threads. Use proper size wrenches
(on coupling body hex and on union
nut) and tighten until coupling bodies
"bottom" or definite resistance is felt.
lengthwise from the coupling union
nut to the bulkhead panel. Then
tighten an additional ¼ turn (approxi-
mately 90°); the marked line rotation
on the coupling union nut will indicate
the amount the coupling has been
tightened. (See figure 6-3.) If a torque
wrench is used, the following torque
values are recommended:
3/8 in. OD liquid return line couplings:
20 ft-lbs.
1/2 in. OD discharge line couplings:
35 ft-lbs.
couplings at both the freezer and the
condenser, secure the condenser
lines to their permanent location with
U-type clamps.
tions for leaks.
NOTE: The freezer is shipped with the service
valves backseated in the normal operating
position.
IMPORTANT:
Condensers are matched to the freezer. To
insure proper freezer refrigerant charge,
connect "A" side condenser to "A" side of
freezer making sure the serial numbers
match. If you have a double unit, make
sure "B" side condenser, freezer and serial
number also match. If this step is followed
then refrigerant does not need to be added
or removed at installation, or as the
seasons change. Refrigerant does not need
to be added or removed at installation, or
as seasons change. The freezer, condenser,
and line sets are factory charged with the
proper amount of refrigerant for all
ambient conditions and for either 25 ft. or
50 ft. line lengths. The total system charge
is 10.5 lb. of R404a. If a leak is found,
recover the refrigerant, repair the leak,
evacuate the system, and recharge with
10.5 lb. of R404a.
— continued
917N-CMT
Figure 6-1 Line Connections
957CMT, 927CMT
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