Pneumatech EH Series, Owner'S Manual

Page 1: ...Heatless Regenerative Air Dryers PHM Series PH Series EH Series Owner s Manual 9829 2103 75 May 2009 ...

Page 2: ...DATE OF PURCHASE MODEL SERIAL NO Record above information from nameplate Retain this information for future reference 1 ...

Page 3: ...cessor Control with Cycle Sight 9 Sequence of Operation 10 Shutdown Procedure 11 PHM Mini Series Heatless Air Dryer Installation Operation General 13 Theory of Operation 13 Start Up Procedure 13 Operational Observation 13 Maintenance 14 PH EH Series Heatless Air Dryer Maintenance General 14 Daily 14 Weekly 14 Monthly 14 Three Months 14 Twelve Months 14 Dewpoint Sensor Optional 14 Mufflers 14 PHM M...

Page 4: ... Programming 17 Measurement Range 17 Options Listing with Explanation PH EH Only 19 Audible Alarm 19 Failure to Shift Alarm 19 High Humidity Alarm 19 Moisture Indicator 19 Panel Lights 19 PLC Controller 19 Dewpoint Demand Control DPD 19 Troubleshooting 20 ...

Page 5: ...visible or suspected contact your local distributor or Pneumatech before attempting to install equipment SERVICE INQUIRIES Provide Model No Serial No Operating Pressure Inlet Temperature Nature of Problem See Dryer Specification Tag located on the control panel SAFETY INSTRUCTIONS When using air compressors and compressed air accessories basic safety rules and precautions must always be followed i...

Page 6: ...ment must be used to convert compressed air to Breathing Air Other special precautions must also be taken Refer to OSHA 29 CFR 1910 134 DISCLAIMER OF WARRANTY If this unit is used to produce breathing air the special equipment and precautions expressed in OSHA 29 CFR 1910 134 for specifications of the necessary equipment and special precautions to make Breathing Air MUST BE used or any warranties ...

Page 7: ...d larger use two sizes of desiccant For all heat reactivated models fill the tower with the 1 4 diameter Activated Alumina first followed by 1 8 Activated Alumina The large desiccant 1 4 size is used to disperse the inlet air flow 7 Close the fill ports and put the dryer in service Refer to the Start Up Procedure listed in this manual MOLECULAR SIEVE OPTION LOW DEWPOINT Dryers with optional Molecu...

Page 8: ...INSTALLATION OPERATION FIGURE 1 COMPRESSED AIR SYSTEM RECOMMENDED INSTALLATION FLOW DIAGRAM 7 ...

Page 9: ...ground with the conductor sized to NEC 10 STORAGE In case of extended storage period before the installation follow these simple procedures a Seal or cover all the parts b Wrap the electrical enclosure c Wrap the mufflers d If the desiccant is shipped loose store it inside to avoid any rain or water damage 11 LEAK TEST All the dryers are tested at the factory for any leaks before shipment An air l...

Page 10: ... 5 minute or ten 10 minute NEMA Cycle The sequence will proceed according to the Sequence of Operation Diagram SDG 2 See Figure 2 The timing starts at zero 2 NEMA CYCLE The DMP Controller can be set to operate in a 5 minute NEMA Cycle or a 10 minute NEMA Cycle The cycle can be selected via a slide switch at the back of the timer 3 FEATURES LED sequence annunciator indicating R L tower drying regen...

Page 11: ...desiccant is designed to handle air saturated with water vapor only Any liquids or slugs of water tend to decrease the efficiency of the desiccant and retard the regeneration process to provide the designed dewpoint At time equal to 0 0 minutes the right tower air inlet valve is open to allow the air to pass through the right tower The left tower inlet valve is closed The saturated compressed air ...

Page 12: ... 5 minute regenerating cycle and with both towers at line pressure If servicing is required advance the time sequence so the purge valves close and pressurize both towers At this time the dryer can be turned off For normal dryer shutdown wait until both towers are at line pressure At this time the purge valves will close 1 If the compressed air system has been piped with a bypass around the dryer ...

Page 13: ...FIGURE 3 PH EH SERIES HEATLESS AIR DRYER FLOW DIAGRAM 12 ...

Page 14: ...Series Heatless Regenerative Air Dryer features State of the Art design The 4 way inlet valve and outlet shuttle valve make these dryers trouble free in operation and require very little maintenance Standard Heatless Regenerative Air Dryers operate on a 10 minute NEMA cycle Drying 5 minutes Regeneration 4 minutes 20 seconds continuous flow Repressurizing 40 seconds While one adsorbent filled tower...

Page 15: ... down relief valves 4 Check outlet dewpoint conditions Twelve Months 1 Close the inlet and outlet valves on the dryer or bypass the dryer and completely depressurize the dryer system Open the desiccant fill port and check visually If desiccant is contaminated with oil or broken replace the desiccant 2 Check for leaking check valves per Table 1 symptoms C D in Troubleshooting Guide Repair or replac...

Page 16: ...iccant fill port and check visually If desiccant is contaminated with oil or broken replace the desiccant 2 Inspect and clean the 4 way switching valve purge solenoid valve and shuttle valve Repair or replace as necessary Mufflers Purge mufflers are installed to reduce the noise level The mufflers tend to plug up and increase back pressure over time due to oil carryover and contaminants from compr...

Page 17: ...FIGURE 4 PHM MINI SERIES HEATLESS AIR DRYER FLOW DIAGRAM 16 ...

Page 18: ...t press the SET button once for ALr1 and twice for ALr2 To adjust the set point press one of the ARROW buttons The display will now flash the current set point Use the ARROW buttons to adjust to the required value Press the SET button and the new value will be saved Pressing the P button will exit the alarm setting mode without saving the new value Standard setting 1 ALr1 20 o F high humidity alar...

Page 19: ...AL2 AL N L Power mA Output SENSOR BLUE GREEN RED FIGURE 6 DEWPOINT DEMAND DPD OPTION WIRING 18 ...

Page 20: ...e air is required for operation FILTER HOUSING SILICA GEL FIGURE 7 MOISTURE INDICATOR PANEL LIGHTS The Panel Light option consists of four lights Left Tower Drying Right Tower Drying Left Tower Regenerating and Right Tower Regenerating These lights are for dryer sequence indication PLC CONTROLLER PLC Controller can also be added to control the operation of standard regenerative dryers Typically Sq...

Page 21: ... plugged 2 Check valves leaking NOTE To test for leaking check valves during regeneration cycle shut the purge adjusting valve If gas is still passing through it is an indication of leaking check valves 3 Excess purge flow 4 Restricted purge exhaust piping 5 Too high purge 1 Replace mufflers 2 Repair or replace faulty check valves 3 Check and reset the purge pressure 4 Remove obstruction or replac...

Page 22: ...imer 5 See C4 G Dryer fails to purge 1 Orifice plate plugged 2 Purge valve fails to open 3 Purge valve closed 4 Purge check valve blocked 1 Clean the orifice plate 2 See F3 3 Reset proper purge pressure 4 Inspect purge check valve Replace if necessary H High dewpoint alarm light See chart on alarm conditions I Moisture indicator color turned translucent wet conditions 1 Bleed valve closed 2 See pr...

Page 23: ...k pressure will result in improper regeneration 1 Muffler plugged 2 Shuttle valve leaking 1 Replace mufflers 2 Clean repair or replace faulty valve C Excessive flow through mufflers 1 Check valves sticking 2 Purge valve sticking 3 Timer short circuited 1 Clean repair or replace valve 2 Clean repair or replace valve 3 Replace faulty timer D Failure to switch 1 Inlet valves did not switch 2 Timer sh...

Page 24: ...Pneumatech 4909 70th Avenue Kenosha WI 53144 Phone 262 658 4300 Fax 262 658 1945 www pneumatech com ...