Summary of Contents for Arrow Pneumatics RH203
- Page 1 HEATLESS DESICCANT AIR DRYER INSTRUCTION & MAINTENANCE MANUAL MODEL RH203 THROUGH RH224...
- Page 2 HEATLESS DRYER SERIES INSTRUCTION AND MAINTENANCE MANUAL IMPORTANT BEFORE INSTALLING OR OPERATING THE DRYER IT IS RECOMMENDED THAT THIS MANUAL BE STUDIED AND CLEARLY UNDERSTOOD. SECTION TOPIC DESCRIPTION SAFETY PRECAUTIONS INSTALLATION OPERATION MAINTENANCE & SYSTEM CHECK PREVENTIVE MAINTENANCE TROUBLESHOOTING GUIDE PARTS LIST PURGE CHART ELECTRICAL SCHEMATIC...
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Page 3: Safety Precautions
1. SAFETY PRECAUTIONS Warnings, Cautions, and Notes used in this manual have the following significance: WARNING MAINTENANCE OR OPERATING PROCEDURES AND TECHNIQUES THAT WILL RESULT IN PERSONAL INJURY OR LOSS OF LIFE IF NOT CAREFULLY FOLLOWED. CAUTION MAINTENANCE OR OPERATING PROCEDURES AND TECHNIQUES THAT WILL RESULT IN DAMAGE TO EQUIPMENT IF NOT CAREFULLY FOLLOWED. -
Page 4: Installation
2. INSTALLATION Arrow Regenerative Air Dryers are shipped as completely assembly packages, filled with desiccant ready to install. Visually check the dryer to make certain that all air lines and electrical connections are securely fastened and were not damaged in transit. If there is evidence of damage, immediately enter a claim with the carrier, and notify your Arrow representative. - Page 5 3. Generally, locate your dryer downstream from the air receiver. The only exception would be on applications with a fluctuating demand. Then the dryer should be located upstream of the receiver to avoid air surges through the dryer’s desiccant beds. 4.
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Page 6: Dryer Operation
3. OPERATION START-UP After all piping and electrical connections are made, proceed as follows: 1. SLOWLY pressurize the dryer. When the dryer reaches full operating pressure, check the system for air leaks. Soap test all joints and fittings. To maintain desired dewpoint, any leaks detected must be fixed, especially those on the outlet side of the dryer. -
Page 7: Timer Operation
Repressurization takes place in a downward direction through the bed, minimizing desiccant dusting. TIMER OPERATION The dryer’s control circuit board or mechanical timer controls the complete cycle. No field adjustment of any kind is required for proper operation. D. ADJUSTABLE PURGE FLOW SYSTEM RH-Series Exhaust Purge Dryers feature an adjustable purge flow system. - Page 8 CAUTION TO MAINTAIN THE PROPER OUTLET DEWPOINT, THE DRYER MUST RECEIVE THE PROPER AMOUNT OF PURGE AIR. IF THERE IS EXCESSIVE BACK PRESSURE IN THE TOWER BEING REGENERATED, CHECK THE PURGE MUFFLER AND PURGE PIPING. BACK PRESSURE IS INDICATED WHEN OFF-LINE TOWER PRESSURE GAUGE READS HIGHER THAT 5 PSIG. THE PIPING AND PURGE MUFFLER MUST BE KEPT CLEAN TO MAINTAIN THE PROPER PURGE RATE.
- Page 9 MOISTURE INDICATOR OPERATION Moisture Indicator is provided to warn operating personnel of dryer malfunction. If dryer is functioning properly, desiccant in Moisture Indicator will be blue. Should blue color fade or turn pink, discontinue dryer use and consult Troubleshooting Guide. OPTIONAL EQUIPMENT (IF APPLICABLE) 1.
- Page 10 5. Allowing the dryer to operate for two complete cycles ensures that the probe will not be exposed to high humidity and damaging liquid water. This is especially important when dryer has been stored or sitting idle for several months. 6.
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Page 11: Solenoid Valves
4. MAINTENANCE AND SYSTEM CHECK PREFILTERS AND AFTERFILTERS 1. Prefilters - The cartridges of the prefilters must be changed as often as required to prevent contamination of the regenerative dryer’s desiccant bed. The prefilter MUST BE DRAINED DAILY. To prolong filter cartridge life, it is recom mended that a mechanical air/moisture separator be placed immediately before the prefilter. -
Page 12: Exhaust Muffler
EXHAUST MUFFLER THE EXHAUST MUFFLER MUST BE PERIODICALLY CHECKED FOR ANY RESTRICTIVE DEBRIS. At high pressures, a clogged muffler could result in high backpressure and could result in mechanical failure or personal injury. EXHAUST MUFFLER CHANGEOUT PROCEDURE WARNING TO AVOID INJURY, DEPRESSURIZE DRYER BEFORE PERFORMING ANY SERVICE. -
Page 13: Preventative Maintenance
5. PREVENTATIVE MAINTENANCE DAILY 1. Check and record inlet pressure, temperature and flow. Verify that it is within specifications. 2. Check tower pressure gauge readings within operating tolerance. 3. Check tower pressure gauges for proper dryer cycling 4. Check that there is no condense discharged from prefilters. 5. -
Page 14: Troubleshooting Guide
6. TROUBLESHOOTING GUIDE PROBLEM PROBABLE CAUSE CORRECTIVE ACTION Elevated Insufficient purge rate 1. Check purge flow settings. Dewpoint 2. Check purge piping for obstruction. 3. Clean purge piping and muffler. Inlet air/gas pressure below 1. Check pressure source. design condition Flow rate higher than design 1. - Page 15 PROBLEM PROBABLE CAUSE CORRECTIVE ACTION Dryer fails to Faulty purge valve 1. Check purge valve and its solenoid pressurize valve. Refer to earlier steps if no pilot air is detected. 2. Check timer sequencing. Dryer Purge valve does not close; dryer 1.
- Page 16 7. PURGE FLOW CHART MODEL SCFM PURGE FLOW METER SETTING RH203 45 PSIG RH204 45 PSIG RH205 10.6 42 PSIG RH206 14.12 60 PSIG RH207 17.5 39 PSIG RH208 21.2 50 PSIG RH209 28.25 50 PSIG RH210 35.3 45 PSIG RH211 42.37...
- Page 19 120/1/60 G R D S T A R T / S T O P S W I T C H F U S E IL-RT I N D I C A T O R L I G H T - R I G H T T A N K I L - L T I N D I C A T O R T A N K - L E F T T A N K T - P C B...
- Page 21 L E F T T O W E R P R E S S U R E P U R G E P R E S S U R E R I G H T T O W E R P R E S S U R E L E F T L E F T R I G H T...
- Page 22 ARROW PNEUMATICS, INC. 2111 WEST 21ST STREET BROADVIEW, IL 60155 WWW.ARROWPNEUMATICS.COM RECOMMEND SPARE PARTS LIST RH-203A THRU RH-224A MODEL PART DESCRIPTION RH203, RH204, & RH208, RH209, & RH206 & RH207 RH211 & RH212 RH213 & RH214 RH205 RH210 INLET VALVE...
- Page 23 ARROW PNEUMATICS, INC. 2111 WEST 21ST STREET BROADVIEW, IL 60155 WWW.ARROWPNEUMATICS.COM RECOMMEND SPARE PARTS LIST RH-203A THRU RH-224A MODEL PART DESCRIPTION RH215 & RH216, & RH220, RH221, & RH218 & RH219 RH223, & RH224 RH217 RH222 INLET VALVE 126158 126227...
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