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DLFSOAH: Installation Instructions
CONNECTION INSTRUCTIONS -
REFRIGERANT PIPING
CAUTION
• The branching pipe must be installed horizontally. An angle of
more than 10 may cause a malfunction.
• DO NOT install the connecting pipe until both the indoor and
outdoor units have been installed.
• Insulate both the gas and liquid piping to prevent water
leakage.
Step 1 - Cut Pipes
When preparing refrigerant pipes, take extra care to cut and flare them
properly. Doing so ensures efficient operation and minimize the need for
future maintenance.
1. Measure the distance between the indoor and outdoor units.
2. Using a pipe cutter, cut the pipe a little longer than the measured
distance.
3. Ensure the pipe is cut at a perfect 90.
Fig. 24 — Cut pipes
NOTE: DO NOT deform the pipe while cutting. Be careful not to
damage, dent, or deform the pipe while cutting. This
drastically reduces the heating efficiency of the unit.
Step 2 - Remove The Burrs
Burrs can affect the air-tight seal of the refrigerant piping connection.
They must be completely removed.
1. Hold the pipe at a downward angle to prevent burrs into the pipe.
2. Using a reamer or deburring tool, remove all burrs from the cut section
of the pipe.
Fig. 25 — Reamer
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Step 3 - Flare Pipe Ends
Proper flaring is essential to achieve an airtight seal.
1. After removing burrs from the cut pipe, seal the ends with PVC tape to
prevent foreign materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of the pipe. Ensure they are facing the
right direction, because they can not put on or their direction changed
after flaring.
Fig. 26 — Flare Pipe Ends
4. Remove the PVC tape from the pipe ends when ready to perform
flaring work.
5. Clamp flare form on the end of the pipe. The end of the pipe must
extend beyond the flare form.
Fig. 27 — Flare Form
6. Place the flaring tool on the form.
7. Turn the handle of the flaring tool clockwise until the pipe is fully
flared. Flare the pipe in accordance with the dimensions.
Table 9 — Piping Extension Beyond Flare Form
Pipe
Tightening
Gauge
Torque
1/4"
18-20 N.m
(
6.35)
(180-200kgf.com)
3/8"
32-39 N.m
9.52)
(
(320-390kgf.cm)
1/2"
49-59 N.m
(
12.7)
(490-590kgf.cm)
8. Remove the flaring tool and flare form, then inspect the end of the pipe
for cracks and even flaring.
14
Flare Dimensions
Flare Shape
(A) (Unit: In/mm)
0.33
0.37
/8.4
/8.7
0.52/
0.53/
13.2
13.5
0.64/
0.65/
16.2
16.5
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