- common goal, limit liquid pressure drop to 2 F (equivalent pressure drop)
Goals
- Ensure Flash Gas is not created by excessive drops
- Results of flash gas are:
- Reduced Capacity
- Noisy Metering Device
- Pitting of the metering device
- Unstable metering device operation
- Possible flooding
- Run lines as direct as possible
- No traps required
- Ensure pressure drop of 2 F (equivalent pressure drop) is not exceeded
- Avoid excessive heat gains
- Avoid liquid Hammering (keep liquid velocity below 360 Fpm)
Oil Equalization on Multi Compressor installations Methods
- Oil separator with oil reservoir and float switch
- Oil equalization lines:
- One line above oil level
- One line below oil level
FOLLOW CODE REQUIREMENTS
Examples of Liquid Line Pressure Drops:
- Add 0.5 PSI for every 1 ft. drop
- Subtract 0.5 PSI for every 1 ft. up
- Add 1 PSI of bends and turns
Example of Coil Splitting
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