Sullair LS20TS Operator's Manual And Parts List page 22

Section 2
DESCRIPTION
Figure 2-4 Air Inlet System
16
2.7 AIR INLET SYSTEM, FUNCTIONAL DESCRIP-
TION
Refer to Figure 2-4. The Compressor Inlet
System consists of a dry-type air filter, a vacuum
switch, and an air inlet valve.
At 20" water column, the inlet vacuum switch will
allow the Supervisor Controller to indicate that "AIR
FILTER MAINT RQD" (inlet filter element mainte-
nance is required).