INSTRUCTION MANUAL FOR WILKERSON MODELS DE3, DE4 AND DE5 COMPACT HEATLESS AIR DRYERS DE3 - DE5 ® OPERATIONS
Wilkerson Compact Heatless Air Dryers GENERAL This instruction manual covers the installation, operation, maintenance and troubleshooting guide for the Wilkerson compact heatless air dryers, models DE3, DE4 and DE5. These dryers are designed to be installed into a compressed air system, providing ultra-dry compressed air to moisture sensitive applications. C D J A B E F K H MUFFLERS (OPTIONAL) L G Outline Dimensions Figure 1 Model Number A B C D E F G H J K L DE3 DE4 35.50 35.50 34.
Wilkerson Compact Heatless Air Dryers DESCRIPTION OF OPERATION Wilkerson DE series compact heatless air dryers employ the principles of pressure swing adsorption (PSA). The operation is fully automatic and relatively little maintenance is required. The dryers utilize two identical desiccant towers, a metering orifice, two shuttle valves, and two 2-way AC operated solenoid valves controlled by a solid state electronic timer.
Wilkerson Compact Heatless Air Dryers INSTALLATION AND OPERATION NOTE: Wilkerson DE series compact heatless dryers have been thoroughly inspected and tested at the factory and are in proper working condition. A. Initial Inspection – Remove the air dryer from the shipping carton. Inspect the exterior and remove the electrical cover and inspect the interior components for any shipping damage.
Wilkerson Compact Heatless Air Dryers NOTE If purge air is required to be piped to a remote location, it is necessary to use oversized tubing to prevent back-pressure. Restricting the purge flow can cause the dryer to malfunction. 4. Use Teflon tape or pipe sealant on threads. Check all air connections for leakage, using soap solution prior to putting dryer into permanent service. 5.
Wilkerson Compact Heatless Air Dryers F. Solid State Timers – The solid state timer used in the DE3, DE4 and DE5 dryers control the switching of the solenoid valves during a two minute total time cycle. The timers are equipped with a one hour memory capability. If power is interrupted, the dryer will resume operation at the same point in the cycle when power is restored.
Wilkerson Compact Heatless Air Dryers MAINTENANCE INSTRUCTIONS A. Field Adjustments – Following proper installation of the Wilkerson DE heatless air dryer, no field adjustments are necessary. No lubrication is required on the dryer. B. Six-Month Check – It is recommended that every 6 months of operation, unit be thoroughly inspected. Inspection should include audible inspection of the towers switching and purge flow.
Wilkerson Compact Heatless Air Dryers DE3, DE4 and DE5 Parts Identification 7 , 8 11 10 6 1 12 13 2 5 3 , 4 Parts Identification Figure 5 Instruction Manual / DE3, DE4 and DE5 9
Wilkerson Compact Heatless Air Dryers PARTS DESCRIPTION – DE3, DE4 AND DE5 HEATLESS DRYERS ITEM NO. 1 2 3 4 5 6 7 8* 9 10 not shown 11 12 not shown 13 not shown not shown PART QTY.
Wilkerson Compact Heatless Air Dryers MODELS DE3, DE4 AND DE5 TROUBLESHOOTING GUIDE PROBLEM: AIR DRYER DELIVERS WET AIR A POSSIBLE CAUSE CHECK CORRECTIVE ACTION A1 No power to unit. On/off switch or power supply. Correct power problem. A2 High inlet air temperature. Inlet air temperature should not exceed sizing criteria stated at purchase (usually 70˚F or 100˚F). Reduce inlet air temperature. A3 Air demand in excess of rated capacity of air dryer.
Wilkerson Compact Heatless Air Dryers MODELS DE3, DE4 AND DE5 TROUBLESHOOTING GUIDE B PROBLEM: RESTRICTED FLOW THROUGH UNIT POSSIBLE CAUSE CHECK B1 Improper operating conditions. See A2, A3, A4 above. B2 Dirty or obstructed inlet air filter. See A5 above. B3 Plugged air passages. Check inlet and outlet air passages and piping for blockages. CORRECTIVE ACTION Clear restrictions.
Wilkerson Compact Heatless Air Dryers MODELS DE3, DE4 AND DE5 TROUBLESHOOTING GUIDE PROBLEM: EXCESSIVE PURGE / BLOWDOWN C POSSIBLE CAUSE CHECK CORRECTIVE ACTION C1 Inlet or outlet shuttle not shifting. Verify nameplate specifications vs. actual operating parameters. Line pressure too low at inlet: Increase line pressure or call factory to resize purge orifice for new conditions. C2 Inlet or outlet shuttle not shifting. Verify nameplate specifications vs. actual operating parameters.
Wilkerson Compact Heatless Air Dryers MODELS DE3, DE4 AND DE5 TROUBLESHOOTING GUIDE D PROBLEM: ALARM WILL NOT CLEAR POSSIBLE CAUSE CHECK CORRECTIVE ACTION D1 Wet air condition not corrected. See Section "A" of Troubleshooting Guide. D2 Sensor not dried out. Allow several minutes for sensor to dry out after correcting dryer problem. Alarm should clear. To speed up alarm clearing, bleed some air through tire valve at bottom of sensor housing. Alarm should clear in less than than 60 seconds.
Wilkerson Compact Heatless Air Dryers MODELS DE3, DE4 AND DE5 TROUBLESHOOTING GUIDE PROBLEM: NO ALARM DURING WET AIR CONDITION E POSSIBLE CAUSE CHECK CORRECTIVE ACTION E1 No power to humidistat board. With voltmeter, check for line voltage at "Hot" and "Neutral" terminals on humidistat board. Also check for line voltage at "Common" and "Neutral". Make sure there is power to dryer. Check wiring diagram for correct wiring. Check continuity of wires. E2 Sensor cable connection.
Wilkerson Compact Heatless Air Dryers MODELS DE3, DE4 AND DE5 TROUBLESHOOTING GUIDE PROBLEM: SHUTTLE VAL VE NOT FUNCTIONING PROPERLY F POSSIBLE CAUSE CHECK CORRECTIVE ACTION F1 No power to shutoff solenoid valve. With power on, disconnect humidity alarm sensor cable from sensor. This will make sure unit is not in alarm and shutoff valve should be energized. With voltmeter, check for line voltage at shutoff solenoid valve, wires #15 and #16.
Wilkerson Compact Heatless Air Dryers Instruction Manual / DE3, DE4 and DE5 83-919-000-FL 6/98
