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13-11-608 Page 13
AUXILIARY AIR RECEIVER
- An auxiliary air receiver is not required if the piping system is large and
provides sufficient storage capacity to prevent rapid cycling. When used, an air receiver should be of
adequate size, provided with a relief valve of proper setting, a pressure gauge and a means of draining
condensate. A system with adequate volume would produce consecutive compressor unload cycles of
no less than 30 seconds.
MOISTURE SEPARATOR/ORIFICE
- Since the unit is equipped with a built-in aftercooler, an integral
moisture separator and drain trap is furnished with the unit. The moisture from the trap is piped to the
compressor inlet flange.
INLET LINE
- Where an inlet line is used between the air filter and the compressor, it must be
thoroughly cleaned on the inside to prevent dirt or scale from entering the compressor.
If welded
construction is used, the line must be shot blasted and cleaned to remove welding scale
. In either
case, the inlet line must be coated internally by galvanizing or painting with a moisture and oil-proof
sealing lacquer. Up to ten (10) feet in length, the inlet line should be the full size of the inlet opening on
the compressor. If an extra-long line is necessary, the pipe size should be increased according to “Inlet
Line” chart, Figure 2-4, page 13.
Accessibility for inlet air filter servicing must be considered when relocating the filters from the unit to a
remote location.
Length of Inlet Line
Diameter of Pipe Size
0 to 10 Feet (0 to 3 Meters)..............................
Same as Compressor Inlet Opening
10 to 17 Feet (3 to 5 Meters)..............................
One size Larger Than Inlet Opening
17 to 38 Feet (5 to 11.5 Meters) .........................
Two Sizes Larger Than Inlet Opening
Figure 2-4 – INLET LINE LENGTHS
DISCHARGE SERVICE LINE
- The discharge service line connection on the unit is at base level. See
“Package Illustrations, Figure 1-2 and Figure 1-3, page 2 & 3. When manifolding two or more rotary
screw units on the same line, each unit is isolated by the check valve in the unit discharge line. If a rotary
screw unit is manifolded to another compressor, be sure the other compressor has a check valve in the
line between the machine and the manifold. If a rotary screw and reciprocating compressor are
manifolded together, an air receiver must be located between the two units.
DANGER
Discharge air used for breathing will cause severe injury or death. Consult
filtration specialists for additional filtration and treatment equipment to meet
health and safety standards.
The oil-free air discharging from the EWD package is saturated with water vapor at discharge
temperature. An air dryer may be required if the air is used in a moisture sensitive process. In addition,
the compressed air may be mixed with atmospheric contaminants entering the intake of the compressor.
Summary of Contents for PUREAIR EWD99E
Page 7: ...13 11 608 Page 2 Figure 1 2 PACKAGE ILLUSTRATION AIR COOLED 302EWD797 A Ref Drawing...
Page 8: ...13 11 608 Page 3 Figure 1 3 PACKAGE ILLUSTRATION WATER COOLED 303EWD797 A Ref Drawing...
Page 9: ...13 11 608 Page 4 Figure 1 4 WATER COOLED SCHEMATIC 300EWD797 D Ref Drawing...
Page 10: ...13 11 608 Page 5 Figure 1 5 AIR COOLED SCHEMATIC 301EWD797 D Ref Drawing...
Page 30: ...13 11 608 Page 25 Figure 4 2 FLOW CHART FOR SETUP PROGRAMMING 300EWC1255 Ref Drawing...
Page 44: ...13 11 608 Page 39 301EWD546 B Ref Drawing Page 2 of 2...
Page 46: ...13 11 608 Page 41 302EWD546 B Ref Drawing Page 2 of 2...
Page 48: ...13 11 608 Page 43 303EWD546 B Ref Drawing Page 2 of 2...