3. Pipe installation
3-1. Caution of piping
CAUTION
Keep the permissible length of every piping limitation to prevent a defect or cooling/heating
failure.
• Piping material:
– Use the designated size (diameter and thickness) of refrigerant pipes.
– Those pipes purchased locally may contain dust inside. Blow out the dust by dried inert gas
when using.
– To process the branch, do not use T-shaped pipe, which causes a uneven refrigerant flow.
Use the optionally available standard branch pipe.
T-tube
UTP-SX236A (Gas)
UTP-SX236A (Liquid)
Twin connection type Twin connection type
UTP-SX354A (Gas)
UTP-SX354A (Liquid)
Triple connection type Triple connection type
– When replacing the unit, never use piping which has been used for previous installations. On-
ly use the new piping.
• Piping process stage:
– Be careful to avoid the dust or water falling into the pipe when preforming piping process and
piping installation.
– When processing the pipe, make the number of bending portion as few as possible, and the
bending radius as large as possible.
– If the diameter of the required pipe is different from the branch unit, either cut it out or use the
reducer.
(continued)
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3-1. Caution of piping 3. Pipe installation
SYSTEM
DESIGN
SYSTEM
DESIGN
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