Cleaning The Inlet Screen; Servicing The Scavenge Line Orifice; Figure 14 Gas Inlet Block And Screen; Figure 15 Scavenge Line Orifice - Emerson Copeland Scroll SZO22 Installation, Operation & Maintenance Manual

Single-Compressor Module
4.4

Cleaning the Inlet Screen

The 30-mesh screen in the inlet block must remain unobstructed for optimal flow rate. If the flow rate is
lower than expected even when the Compressor is running properly, this screen may be obstructed.

Figure 14 Gas Inlet Block and Screen

To inspect and clean the inlet screen:
1. Turn off and isolate the Compressor from all power
sources.
2. Turn off the gas supply.
3. Vent the system to 0 psig.
4. Remove the SAE plug on the side of the inlet block.
5. Remove the screen.
6. Inspect the screen and inside of the block. Clean or
replace if necessary.
7. Replace SAE nut.
8. Return the Compressor Package to service.
9. Check for leaks at all fittings that have been disturbed.
4.5

Servicing the Scavenge Line Orifice

The scavenge line orifice in the oil separator block must remain clear of obstruction. If this orifice is
restricted, the secondstage oil separator can become saturated, increasing oil consumption.
Note: image shown is 90 degree orifice. Procedure is the same for straight orifice.

Figure 15 Scavenge Line Orifice

To inspect and clean the orifice:
1. Turn off and isolate the Compressor from all power sources.
2. Turn off the gas supply.
3. Vent the system to 0 psig.
4. Disconnect the tube and remove the fitting.
5. Inspect the screen. Clean or replace the fitting assembly if necessary.
6. Replace the fitting and reconnect the tube. Tighten the swage nut hand tight plus 1/4 turn.
7. Return the Compressor Package to service.
8. Check for leaks at all fittings that have been disturbed.
Orifice
21
Maintenance
2008SSD-34 (5/11)