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12.3 Outdoor Unit
12.3.1 Install the Outdoor Unit
After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.
1 Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm).
2 When installing at roof, please consider strong wind and earthquake.
Please fasten the installation stand firmly with bolt, screws or nails.
AB
C
D
Model A B C D
Z25***, Z35***, Z42*** 540 mm 160 mm 18.5 mm 330 mm
Z50***, Z71*** 613 mm 131 mm 24 mm 360.5 mm
12.3.2 Connect the Piping
12.3.2.1 Connecting the Piping to Indoor
For connection joint location at outside building
Please make flare after inserting flare nut (locate at
joint portion of tube assembly) onto the copper pipe.
(In case of using long piping)
Connect the piping
Align the center of piping and sufficiently tighten
the flare nut with fingers.
Further tighten the flare nut with torque wrench in
specified torque as stated in the table.
Torque
wrench
Spanner or
Wrench
For connection joint location at inside building
Decide the length.
Cut and remove the tube connectors at indoor
copper pipings (both gas and liquid piping) by
using pipe cutter. Remove burrs from cut edge.
Use pipe expander to expand the end of long
piping.
Align the center of piping and braze the piping
joints.
Indoor
copper pipe
Tube connector
(40~50mm)
Brazing point
1. Cut and Remove 2. Expand long pipe 3. Braze both pipe
12.3.2.2 Connecting the Piping to Outdoor
Decide piping length and then cut by using pipe cutter.
Remove burrs from cut edge.
Make flare after inserting the flare nut (locate at valve)
onto the copper pipe. Align center of piping to valve
and then tighten with torque wrench to the specified
torque as stated in the table.
Do not overtighten, overtightening may cause gas leakage.
Piping size Torque
6.35 mm (1/4") [18 N•m (1.8 kgf•m)]
9.52 mm (3/8") [42 N•m (4.3 kgf•m)]
12.7 mm (1/2") [55 N•m (5.6 kgf•m)]
15.88 mm (5/8") [65 N•m (6.6 kgf•m)]
19.05 mm (3/4") [100 N•m (10.2 kgf•m)]
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