Recommended System Design; Electrical Connection - Gardner Denver GSRN Series Instruction Manual

RECOMMENDED SYSTEM DESIGN

A healthy, long-term, and trouble free compressed air supply design should be approached as a complete
system, not individual components. The air compressor Intake location is vital to system health; it should
supply clean fresh air that is free from possible contaminant (e.g. ammonia, chlorine or methane). Any
contaminant entering the compressor intake will be concentrated by a factor of 8 due to the compression
process in a typical compressed air system.
A properly sized and maintained compressed air aftercooler is vital to maintaining an acceptable system
temperature range. GSRN Series refrigerated air dryers are designed to operate at rated flow with a
maximum inlet temperature of 100°F (37.7°C). Units can be oversized to accommodate higher inlet
temperatures up to 120°F (48.8°C). As dryer inlet temperatures rise above the design 100°F (37.7°C), the
moisture holding capacity of the air rises dramatically. The following table represents the additional
moisture load at elevated temperatures.
100°F (37.7°C)
Inlet Temperatures
Additional Load
The pipe connection to the dryer should match the standard connection ports provided. The chart below
is provided as a basic guide to size branch and header piping. It is recommended that shut-off valves with
unions be installed at each port, with a valve bypass to permit isolation of the unit for servicing without
interruption of plant air supply.
Maximum Recommended Compressed Air Flow Schedule 40 pipe @ 95 to 115 PSIG
½"
Pipe Size
Flow (SCFM) 40

ELECTRICAL CONNECTION

The Nameplate/Data plate located on each unit identifies the power supply requirements and
maximum fuse specification. Units supplied with cord and plug requires the installation of a
receptacle rated for 15 amps. Units supplied with electrical junctions, require a suitable fused
disconnect in compliance with the National and Local Electrical Code requirements.
Three phase versions of the GSRN air dryer are NOT sensitive to phase alignment. Rotation of motors is
universal
The wiring of all functional electrical components has been completed and tested at the factory in
accordance with the electrical wiring schematic provided with this manual.
105°F (40.5°C)
0% 15%
¾" 1" 1¼"
100 150 200
GSRN10-2250A-SM
Page 4 of 10
110°F (43.3°C) 115°F (46.1°C)
32% 51%
1½" 2"
2½
350 650 900
120°F (48.8°C)
75%
3" 4" 6"
1500 2500 5000