Panasonic CS-TZ20WKEW, Service Manual, Page: 68 / 233

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12.2.5 Connect the Piping
12.2.5.1 Connecting the Piping to Indoor
12.2.5.2 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)]
12.2.5.3 Connecting the Piping to Outdoor Multi
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.
* For Gas side piping please refer table and diagram below
For connection joint of all model (except R32 model)
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
Additional Precautions For R32 Models when connecting by flaring at indoor side
Ensure to do the 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 neut ral cure
(Alkoxy type) and ammonia-free
silicone sealant along the
circum ference
Connection pipe
(fem a le s ide)
A u xili a ry pipe
(m a le s ide)
Fl a re N u t
H a ll Union
Li qu id s ide
Outdoor Multi Combination Model
Pipe size (refer
to diagram)
R32 Model
CS-TZ20***,
CS-TZ25***,
CS-TZ35***,
CS-RZ20***,
CS-RZ25***,
CS-RZ35***, CU-2Z35***,
CU-2Z41***,
CU-2Z50***,
CU-3Z52***,
CU-3Z68***,
CU-4Z68***,
CU-4Z80***,
CU-5Z90***,
CU-2TZ41***,
CU-2TZ50***,
CU-3TZ52***
CS-TZ42***,
CS-TZ50***,
CS-RZ50***, CU-2Z50***,
CU-3Z52***,
CU-3Z68***,
CU-4Z68***,
CU-4Z80***,
CU-5Z90***,
CU-2TZ50***,
CU-3TZ52***
(CZ-MA1P)
CS-TZ60*** CU-3Z68***,
CU-4Z68***,
CU-4Z80***,
CU-5Z90***
(CZ-MA2P)
CS-TZ71*** CU-4Z80***,
CU-5Z90***
(CZ-MA2P) &
(CZ-MA3P)
Hall Union
Connection pipe
(female side)
Auxiliary pipe
(male side)
Flare Nut
Hall Union
Packing
Connection pipe
(female side)
Auxiliary pipe
(male side)
Pipe size reducer (CZ-MA1P)
Flare Nut
Auxiliary pipe
(male side)
(Outdoor)
Auxiliary pipe
(male side)
(Indoor)
Hall Union
Hall Union
Packing
Connection pipe
(female side)
Pipe size expander
(CZ-MA2P)
Flare Nut
Auxiliary pipe
(male side)
(Outdoor)
Auxiliary pipe
(male side)
(Indoor)
Hall Union
Hall Union
Packing
Packing Connection pipe
(female side)
Pipe size expander
(CZ-MA2P)
Flare Nut
Pipe size reducer
(CZ-MA3P)
Gas side