Reciprocating Compressor M Series
3-9
8. Retain the coupling/insert on the motor side on the spacer.
9. When attaching the hub and coupling/insert on the motor side, move the hub to the gap in which the
washers fit, and adjust the interval between the coupling hubs.
If the washers do not fit in easily, or there are gaps between the coupling/insert, washers, and hub face,
force in the axle direction (thrust) is applied. Prevent this thrust from applying.
10. Tighten the hub on the motor side on the axle.
11. Tighten all the nuts at the specified torque again.
3.2.5.5 Piping
Vibration generated from the compressor is transmitted to the building via two systems: foundation and piping.
Take into consideration the piping support to prevent resonance in the building.
Refrigerant Piping
Observe the followings when connecting the piping.
z The piping must be free from moisture, dirt, foreign particles. It may cause trouble after starting .
Assemble the piping in a clean environment. Be sure to put system in complete vacuum before startup
z If the suction piping is assembled inappropriately, it may cause troubles such as oil in the piping not
returning to the compressor, and liquid compression.
z When connecting the piping to the compressor, select a pipe whose size is the same as the connection of
compressor. If the pipe size is smaller than the connection of compressor, it restricts the oil or
refrigerant flow, resulting in troubles.
z Make sure to attach supports to the piping so that excessive force is not applied to the compressor. Also,
when a vibration-proof base is used, install flexible tubes on the piping.
z Separate pipes on which dew may form.
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