45MBDAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
30
• Remove PVC tape from ends of pipe when ready to perform flaring
work.
• Clamp flare from on the end of the pipe. The end of the pipe must
extend beyond the flare form.
Fig. 58 —Flare Form
• Place flaring tool onto the form.
• Turn the handle of the flaring tool clockwise until the pipe is fully
flared.
Table 17 — Piping Extension Beyond Flare Form
• Remove the flaring tool and flare form, then inspect the end of the
pipe for cracks and even flaring.
Step 4: Connect Pipes
Connect the copper pipes to the indoor unit first, then connect it to the
outdoor unit. You should first connect the low-pressure pipe, then the
high pressure pipe.
• When connecting the flare nuts, apply a thin coat of refrigeration oil to
the flared ends of the pipes.
• Align the center of the two pipes that you will connect.
• Tighten the flare nut snugly by hand.Using a wrench, grip the nut on
the unit tubing.
• While firmly gripping the nut, use a torque wrench to tighten the flare
nut according to the torque values in the above table.
NOTE: Use both a spanner and torque wrench when connecting or
disconnecting pipes to/from the unit.
Fig. 59 —Torque Pipe Connections
NOTE: MINIMUM BEND RADIUS. Carefully bend the tubing in
the middle according to the diagram below. DO NOT bend
the tubing more than 90° or more than 3 times.
Fig. 60 —Use Care When Bending
• After connecting the copper pipes to the indoor unit, wrap the power
cable, signal cable and the piping together with binding tape.
NOTE: DO NOT intertwine signal cable with other wires while
bundling these items together. Do not intertwine or cross the
signal cable with any other wiring.
PIPE
GAUGE
TIGHTENING
TORQUE
FLARE
DIMENSIONS (A)
FLARE SHAPE
Ø1/4in
(Ø6.35mm)
18-20 N.m
(180-200kgf.cm)
0.33~0.34in
(8.4~8.7mm)
Ø3/8in
(Ø9.52mm)
32-39 N.m
(320-390kgf.cm)
0.52~0.53in
(13.2~13.5mm)
Ø1/2in
(Ø12.7mm)
49-59 N.m
(490-590kgf.cm)
0.64~0.65in
(16.2~16.5mm)
Ensure to wrap insulation around the piping. Direct contact with the
bare piping may result in burns or frostbite.
Make sure the pipe is properly connected. Over tightening may
damage the bell mouth and under tightening may lead to leakage.
To Next Page
Loading...
