Hitachi RPC-3.0FSN3 - Page 24

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P5416543
(9) Do not touch the refrigerant pipes to low
strength portions of walls or ceilings. If not,
it may cause abnormal sound or vibration.
(10) Perform the air tight test. The air tight
procedures should be performed according
to “Installation & Maintenance Manual” of the
outdoor unit.
(11) Insulate each are connection without gap
to prevent of dew condensation by using
the accessory insulations, and insulate each
refrigerant pipe also.
(6) When on-site piping with joint such as elbow,
socket is buried, provide a service access
door to facilitate the check for connecting
part.
(7) Perform to support for earthquake resistant
to the pipes in order not to damage by an
external force.
(8) Do not clamp tightly the refrigerant pipe
when supporting for prevention of heat
stress.
(12) When the thickness of insulation for gas
piping is 20mm, attach the insulation moving
to the indoor unit side as shown in the right
gure.
When attaching, wrap the insulation without
gap between the insulation and local piping
insulation.
Do not apply excessive force to the are nut
when tightening. If applied, the are nut may
crack due to aged degradation and refrigerant
leakage may occur.
Use the specied tightening torque.
l
Cap the end of the pipe when the pipe is to be
inserted through a hole.
l
Cap the end of the pipe to avoid rain or water
entering.
l
Do not put pipes on the ground directly without a
cap or vinyl tape at the end of the pipe.
(14) Evacuation and refrigerant charging
procedures should be performed according
to “Installation & Maintenance Manual” of the
outdoor unit.
(13) If using a forming agent (recommended
Gupoex) after installing the air panel,
avoid touching the forming agent to the air
panel. If the forming agent is touched to
the air panel, it may cause the breakage
and the falling of the air panel. In this case,
completely wipe off the touched forming
agent.
Fasten 3 places of
the pipe by cord clamps
(Accessory).
Fix the vinyl tape position at the vertical part
(Insulation for Refrigerant Pipe (Accessory)).
Fasten securely cord clamps and
the vinyl tape in order to prevent
the pipe from dew condensation
Unit
Side
Check no clearance between
the indoor unit and the insulation.
Insulation Material
(Factory-Supplied)
Insulation for
Refrigerant Pipe
(Field-Supplied)
Refrigerant Pipe
(Field-Supplied)
Cord Clamp
Refrigerant Pipe
(Field-Supplied)
Insulation (Accessary)
Insulation (Attached to Indoor Unit)
Wrap tape without gap.
Indoor Unit
Insulation for Refrigerant Pipe
(Field-Supplied)
Correct Incorrect