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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.
Model A B C D
BZ25***, BZ35***,
UZ25***, UZ35***,
PZ25***, PZ35***
570 mm 105 mm 18.5 mm 320 mm
BZ50***, UZ50***,
PZ50***
540 mm 160 mm 18.5 mm 330 mm
BZ60*** 613 mm 131 mm 24 mm 360.5 mm
12.3.2 Connect the Piping
12.3.2.1 Connecting the Piping to Indoor
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)]
AB
C
D
For connection joint of all models
Connect the piping
•
Align the center of piping and sufficiently
tighten the flare nut with fingers.
•
Further tighten the flare but with the torque wrench
in specified torque as stated in the table.
Torque wrench
Spanner or
Wrench
Additional Precautions For R32 Models when connecting by flaring at indoor side
Ensure to do re-flaring of pipes before connecting to units to avoid leaking.
Seal sufficiently the flare nut (both gas and liquid sides) with neutral cure
(Alkoxy type) & ammonia-free silicone sealant and insulation material to avoid
the gas leak caused by freezing.
Neutral cure (Alkoxy type) & ammonia-free silicone
sealant is only to be applied after pressure testing and
cleaning up by following instructions of sealant, only to
the outside of the connection. The aim is to prevent
moisture from entering the connection joint and possible
occurrence of freezing. Curing sealant will take some time.
Make sure sealant will not peel off when wrapping the insulation.
Apply neutral cure
(Alkoxy type) and
ammonia-free silicone
sealant along the
circumference
Please make flare after inserting flare nut (locate at
joint portion of tube assembly) onto the copper pipe.
(In case of using long piping)
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