Pioneer WYT Inverter Series Installation & User Manual page 35

Outdoor Unit Installation Instructions
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight
seal.
1. After removing burrs from 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 pipe. Ensure
that they are facing the correct direction,
because they cannot be put on or have
their direction changed after flaring.
Flare Nut
Copper Pipe
4. Remove PVC tape from ends of pipe 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
edge of the flare form in accordance with the
dimensions shown in the following table:
PIPING EXTENSION BEYOND FLARE FORM
Outer Diameter of
Pipe (mm)
Ø 6.35 (Ø 1/4")
Ø 9.52 ( Ø 3/8")
Ø 12.7 (Ø 1/2")
Ø 16 (Ø 5/8")
Ø 19 (Ø 3/4")
Flare Form
6. Place flaring tool onto the form.
7. Turn the handle of the flaring tool
clockwise until the pipe is fully flared.
8. Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and
successful, even flaring.
Step 4: Connect pipes
When connecting refrigerant pipes, be careful
not to use excessive torque, or to deform the
piping in any way. One should first connect the
low-pressure pipe, then the high-pressure pipe.
If provided by the supplier, apply leak
guard material on all flared mating surfaces.
Connection Pipes
Flare Nuts
7
A (mm)
Min. Max.
0.7 (0.03") 1.3 (0.05")
1.0 (0.04") 1.6 (0.06")
1.0 (0.04") 1.8 (0.07")
2.0 (0.08") 2.2 (0.09")
2.0 (0.08") 2.4 (0.1")
A
Pipe
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