Gardner Denver PUREAIR EWC99C, Operating And Service Manual

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DISCHARGE SERVICE LINE - The discharge service line connection on the unit is made from the right
side at base level from the motor end of the package. 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 EWC 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.
UNIT WATER DRAIN - The unit drain ports should be connected to a floor drain(s). Drain line(s) must
slope downward, away from the unit, to allow effluent to flow by gravity, and must be vented to the
atmosphere to avoid the accidental back flow of said effluent into the package. As necessary, the
automatic water management system will open the drain solenoid valve to drain excess water. Since the
drain solenoid valve may open at any point during compressor operation, high temperature water under
pressure may be discharge from the unit. During operation, a small, steady stream of wash water is
normally discharged by the water treatment filter via the drain port.
DANGER
Hot water under pressure will cause severe personal injury or death. Do not
operate compressor until a water drain line is installed from compressor water
drain port to a floor drain.
AIR/WATER RESERVOIR WITH INTEGRAL MOISTURE SEPARATOR - The air/water reservoir-
separator combines multiple functions into one vessel. On one end of the vessel, the lower half functions
as a reservoir, providing water storage capacity for the system and the upper portion serves as primary
air/water separation. The reservoir also provides limited air storage for control and gauge actuation.
Secondary moisture separation is achieved downstream of the aftercooler on the other end of the vessel.
COMPRESSOR INJECTION WATER SYSTEM CHECK - The following readings are based on an
ambient temperature of 80
°
F inlet cooling air on air-cooled units with the cooling system in good, clean
condition. The compressor should be at operating temperature at the time of the checks. One-half hour
of loaded operation is usually sufficient to reach level-out operating temperatures.