Room Suction Line
Room suction line, more like a room in the liquid line. The items to be inspected are:
- Size of the suction line.
- Side valves.
- Vibration absorber.
- Check valves.
- Two temperature valves.
- Constant pressure valves.
- Filter-dehydrator.
- Silencer.
- Battery.
- Joints.
- Pinched or buckled suction line.
Suction line size matters. If it is too small, it will cause too high pressure drop. High gas velocities will cause noise. The line should be the size of the suction service valve, connection, or it should be the size of the suction line connection to pressurized dome.
On some installations, the suction line is less for each evaporator than the suction line. For example, the most remote of the evaporator can have 1/2" OD size. The following is a 5/8" OD, then 1" OD, then 1 1/2" OD. Line in the compressor 2" OD.
Drop the pressure must be checked by the installation of one gauge in the most remote evaporator and the compressor.
Recording IOWR on the side of the pressure of the unit. Do it again only as the unit stops. Pressure difference. Pressure drop should be approximately 2 psi (14 kPa). If more linear dimensions must be increased.
The change in pressure in two-temperature valves and constant pressure valves should be checked. Their pressure falls separated from the line pressure drop. Also determine the pressure at the suction line, filter-drier. A large drop the pressure points, partially clogged filter-dehydrator. In this case, the desiccant should be replaced. Leak test with at least 15 psi 207 kPa) pressure in the line...
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Industrial