Panasonic CS-MZ16VKE Service Manual page 32

12.2.5 Connect the Piping
12.2.5.1 Connecting the Piping to Indoor
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.
Spanner or
Wrench
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.
12.2.5.3 Cutting and Flaring the Piping
1 Please cut using pipe cutter and then remove the burrs.
2 Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end
down to avoid the metal powder entering the pipe.
3 Please make flare after inserting the flare nut onto the copper pipes.
Pipe
Reamer
Point down
1. To cut 2. To remove burrs
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.
Torque
wrench 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.
Handle
Bar
Yoke
Core
Red arrow mark
Clamp handle
3. To fl are
Apply neutral cure
(Alkoxy type) and
ammonia-free silicone
sealant along the
circumference
Do not overtighten, overtightening may cause gas leakage.
Piping size
6.35 mm (1/4")
9.52 mm (3/8")
12.7 mm (1/2")
15.88 mm (5/8")
19.05 mm (3/4")
0 – 0.5 mm
Bar
Copper pipe
32
Torque
[18 N•m (1.8 kgf•m)]
[42 N•m (4.3 kgf•m)]
[55 N•m (5.6 kgf•m)]
[65 N•m (6.6 kgf•m)]
[100 N•m (10.2 kgf•m)]
Improper fl aring
Inclined Surface Cracked Uneven
damaged thickness
When properly fl ared, the internal surface of the
fl are will evenly shine and be of even thickness.
Since the fl are part comes into contact with the
connections, carefully check the fl are fi nish.