Installation Of Hermetic Compressor
The compressor motor plant must be air exact replacement. Tt should be the same size as the one being replaced. The motor-compressor must be calculated on the low side of the required pressure (low, medium, or high). The recommended installation order of replacement of the motor-compressor:
- Thoroughly clean about 2 inches (50 mm) on the ends of suction, discharge, and oil pipes,
- Thoroughly clean the suction, discharge, and oils, connections lines on the motor-compressor.
- If the piercing valve and adapter is not installed, then do it. Connect the manifold.
- Connect the line. Use the adapter fittings, tube length, or extension, if necessary. The extender will allow you telescope EC pipes of motor-compressor in the suction and discharge lines. Cm. Fig. 12-86. Kick-type crimp tool can be used if the extender is not available. Telescope in the tubes together, using as a small stream as possible. Soldering connections.
When soldering, keep the heat from other soldered joints.
Use a damp / wet cloth, or a special heat-absorbing compounds for protection of other joints. Metal siding protects the Cabinet, wire and plastic parts of the flame. NOTE: replacing the engine compressor or stub line can be smaller in diameter than the Cabinet block suction and/or discharge line. This indicates the replacement of the compressor motor may be too small. Cut on the liquid line between the condenser and the refrigerant control. Installation of a filter-dehydrator capabilities. Put some vapour refrigerant in the system (about 25 pounds per square inch [40 psi) or 280 kPa]). To check for leaks. When using the unit, regeneration, recovery of refrigerant and prepare for the vacuum.
Connect the vacuum pump via a system of gauge manifold. Draw the same high vacuum as possible. Mow, vacuum pump, hold this high vacuum, at least an hour. You can also place the refrigerant, and then again its evacuationthree-step method. (Another way to check for leaks to close the connection, the vacuum pump. Observe whether the vacuum system remains constant or not. If it doesn't, it means that there is a leak in the system.) Free small amount of refrigerant in the system and clear. This will help clear the refrigerant lines.
Charging lines with a small amount of refrigerant in the system. Adjust the pressure to the atmospheric and slightly higher. Reconnect to the electrical circuit. To charge the system with the correct amount of refrigerant. Best slightly inflated and clear to the required number. The use of the collector makes this operation is simple enough. Close all combs, plug-in electric circuit, and work with the system through several cycles.
Remove the gauge manifold and recovery. Carefully seal all openings in the system, depending on the manifold connections. It is a good practice to place a recording thermometer in the refrigerator Cabinet. This enables the operation to be checked continuously for at least 24 hours.
Fig. 12-87 shows the replacement of the motor-compressor. He has suction, discharge line and reset process tube. On Fig. 12-88, process pipe tubing expansion soldered.
In many cases, replacement engine compressors burn out soon after they are installed. Most repeated burnouts due to systems containing moisture or may not be clean enough. Installation of suction line filter and high-side filter reduces repeat burnouts.
 ..
|
Industrial 
..