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5-3 Corrective 

Maintenance 

This section provides you with the information necessary to correct or repair any issues 
which might appear during the normal operation of your dehumidifying dryer.  Although we 
have listed how to perform these procedures, it is recommended that you call the Service 
Department to have any in-depth maintenance performed. 

Symptoms of Worn Desiccant 

The moisture absorption capacity of the desiccant used in your dehumidifying dryer degrades 
after an indefinite period of time. Useful life depends on variables such as the condition of the 
process filter, how much dust and fines have been passed through the filter and got into the 
desiccant chamber, and plasticizer vapors in the return air. 

 

WARNING! 

Handling desiccant material is HAZARDOUS. 

Wear an N-100 type safety filter mask or equivalent to avoid prolonged 
breathing of desiccant dust. Wear safety goggles and gloves to avoid 
contact with eyes and skin. 

 

Handle with adequate ventilation.

 

 

Wash hands thoroughly after handling. 

+ FIRST AID + 

In case of eye contact, immediately flush eyes 

with plenty of water for at least 15 minutes.

 

 

SEE A PHYSICIAN IMMEDIATELY IF IRRITATION PERSISTS.

 

Replacing Worn Desiccant 

Caution! 

DESICCANT BEDS ARE HOT DURING OPERATION. 

To avoid burn hazard, make sure desiccant beds are sufficiently cool 
before replacing worn desiccant. 

 

To access the Desiccant Bed: 

1.

 

Disconnect electrical power to the dryer. 

2.

 

Using a 1/8” Allen wrench, remove the four (4) 10-32 button head screws holding the 

Desiccant Cap to the Regeneration Heater. 

3.

 

Remove the Desiccant Cap. 

4.

 

With a shop vacuum, carefully remove all desiccant from each tower. 

 

 

 

 

Portable Drying/Conveying Systems 

Chapter 5:  Maintenance 

43 of 63 

Содержание SDAA 25-100

Страница 1: ..._____________________ _________________________ _________________________ _________________________ _________________________ _________________________ We are committed to a continuing program of prod...

Страница 2: ...to our original invoice If the shipment was prepaid write us for a receipted transportation bill Advise customer service regarding your wish for assistance and to obtain an RMA return material author...

Страница 3: ...ctrical Features 12 Controller Features 12 2 4 Options 13 2 5 Safety Devices and Interlocks 13 Safety Circuit Standards 13 Fail Safe Operation 14 Safety Device Lock Outs 14 CHAPTER 3 INSTALLATION 15 3...

Страница 4: ...ew Pt Setup 29 Auto Start 29 Main Menu 30 Help Menu 30 System Menu 31 System Setup 31 Set Clock 32 Set Auto Start Clock 32 Set Alarm Clock 33 Hour Meters 33 Input Status 34 Output Status 34 System Set...

Страница 5: ...ns 55 Warranty Liabilities 55 Customer Responsibilities 56 7 2 Optional Components 56 7 3 Technical Specifications 56 Annex B Information 56 Aftercooler Design Specifications 57 7 4 Drawings and Diagr...

Страница 6: ...fely and efficiently The Maintenance chapter is intended to serve as a source of detailed assembly and disassembly instructions for those areas of the equipment requiring service Preventive maintenanc...

Страница 7: ...nstallation instructions when installing operating and maintaining this equipment If these instructions become damaged or unreadable additional copies are available from the manufacturer Follow all SA...

Страница 8: ...es safety for the operator and all workers in its vicinity Each individual must take responsibility for observing the prescribed safety rules as outlined All warning and danger signs must be observed...

Страница 9: ...or adjust the equipment without appropriate training and first reading and understanding this manual NEVER try to pull material out of the equipment with your hands while it is running Before you star...

Страница 10: ...onent use appropriate handling equipment Before you use handling equipment portable A frames electric boom trucks fork trucks overhead cranes be sure the load does not exceed the capacity of the handl...

Страница 11: ...of the low dew point process air is directed to the desiccant tank that is off process This air is heated to approximately 450 F 232 C before entering the bed that is in regeneration The moisture is t...

Страница 12: ...A79 machinery electrical standards Non fused electrical disconnect Branch fusing Solid State process heater contactor Regeneration temperature control Process high temperature alarm light Dirty filter...

Страница 13: ...s and procedures that are inherent to the drying system This manual is not intended to supersede or alter safety standards established by the user of this equipment Instead the material contained in t...

Страница 14: ...equipment are primarily concerned with electrical power disconnection and the disabling of moving parts that may need to be accessed during the normal operation of the machine Some of the safety devi...

Страница 15: ...placing the drying and conveying system Figure 1 below shows a suggested safe rigging diagram It lets you lift the dryer hopper unit vertically using a fork truck Caution If you are mounting a machine...

Страница 16: ...mounted on a cart Moving the unit with a hoist will cause it to become unstable and may cause damage to the equipment and or injury to personnel Figure 2 Suggested Lift Rigging for Cart Mounted Dryers...

Страница 17: ...or injury to personnel 3 3 Electrical Connections When making electrical connections to your unit ensure that you take into consideration and make arrangements for the following A qualified electrici...

Страница 18: ...onnect outside the dryer or at the disconnect terminal in the control enclosure This assures that the blower rotates in the proper direction Drying Hopper Air Trap Considerations If Equipped Our exclu...

Страница 19: ...bottom of the drying hopper Make sure that the blowers turn in the right direction 5 Fill the drying hopper with material 6 Press the START button on the Touch Screen to start the dryer The process bl...

Страница 20: ...ine companion equipment such as the aftercooler 3 If the dryer is shut down using the shutdown button on the dryer status screen the process heater will shut off and the bed regeneration process will...

Страница 21: ...h energizes the control circuit PLC touch screen relays etc within the control enclosure Touch Screen The Touch Screen is located in the center of the control enclosure Once the disconnect is on and t...

Страница 22: ...ing system for specific applications Figure 4 Dryer Status Screen on Touch Screen Controller Startup Screen The screen shown above provides the operator with the following information Dryer Model Numb...

Страница 23: ...on of the controller at this time Press the DRYER MENU button to return to the next section of dryer functions Dryer Status Screen Shown at Controller Power Up Note Looking at the screen from Left to...

Страница 24: ...ence shutdown and the button text will change to RESTART The process heater will shut off the current bed regeneration will be completed and then the blower will stop If sequence shutdown is not desir...

Страница 25: ...will take the operator back to the original status screen shown on page 27 Pressing MENU will return you back to the menu screen DRYER SETUP By pressing the LOW or HIGH alarm buttons the operator can...

Страница 26: ...and boiling water 212 F at sea level Then you may change these settings accordingly to make sure the controller is displaying the correct temperature Setting Values By pressing and holding the numbers...

Страница 27: ...ir temperature exceeds this value after a certain delay time the process temperature will be reduced to its secondary value SETPOINT to eliminate over drying of the plastic material The DELAY is the t...

Страница 28: ...e operator to the CONVEY STATUS of the system You will only get CNV alarms when conveying options are enabled Nomad only At this point the operator can return back to the DRYER MENU or MAIN MENU by to...

Страница 29: ...Clear to erase the current values and reenter new ones To set the values in the next field press ENT Enter to close the screen shown above Then select the next number field to enter new values Once th...

Страница 30: ...s Press ENT Enter when you are finished to set the new values or CLR Clear to erase the current values and reenter new ones To set the values in the next field press ENT Enter to close the screen show...

Страница 31: ...stay off until another alarm occurs OPER PW is the four 4 digit number that allows access to the station and pump status screen and the station operator screen When this feature is set to 0000 these s...

Страница 32: ...utes under Set Clock on the own above the following screen will appear memory when the dryer is de energized Setting Values By pressing the numbers Month Day Ye previous screen sh Enter the values you...

Страница 33: ...rn back to the CLOCK MENU screen Press the SYSTEM MENU button in the CLOCK MENU SCREEN to return back to the system menu screen and the next set of programmable features Hour Meters This screen monito...

Страница 34: ...ator to view the status of variables contributing to the disbursement of material from the drying system to the molding machine At this point the operator may choose the SYSTEM MENU button to go back...

Страница 35: ...s the RETURN key to go back to the SYSTEM MENU Touching the MAIN MENU button in the SYSTEM MENU screen will return the operator back to the overall menu screen Alarm Screens This screen allows the ope...

Страница 36: ...utton in the lower half To turn off the alarm the user must press the ALARM SILENCE button This will cancel the alarm Redundant Safety Controller Display Optional The Redundant Safety Controller limit...

Страница 37: ...display and PAGE will appear in the lower display 2 Press the Advance Key to move through the parameter prompts 3 Press the Up or Down keys to change the parameter value 4 Press the RESET Key at any...

Страница 38: ...s until the cam switch makes 2 transitions b If the cam switch does not make a transition within 10 seconds a valve motor fault alarm is generated The alarm horn and light are activated The valve moto...

Страница 39: ...e HEAT portion of the regeneration sequence the regen heaters are disabled by the PLC and the COOL time begins 12 Once the COOL time has expired the valve motor is turned on until the cam switch makes...

Страница 40: ...ections are air tight Every month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Lock out electrical power and inspect electrical wiring for integrity Lock out electrical power and check heater eleme...

Страница 41: ...plastic fines drawn in from the drying hopper and prevents the desiccant from being contaminated Regular filter cleaning is essential to keep your dryer operating at peak efficiency You can blow or va...

Страница 42: ...ight Check for damaged gaskets or dented metal parts Do not re use a damaged filter Check the gasket for damage A damaged gasket allows contaminants into the process Replace as needed Servicing the De...

Страница 43: ...material is HAZARDOUS Wear an N 100 type safety filter mask or equivalent to avoid prolonged breathing of desiccant dust Wear safety goggles and gloves to avoid contact with eyes and skin Handle with...

Страница 44: ...sket Regeneration Thermocouple 13X Molecular Sieve 8x12 Beads Caution You should properly dispose of any discarded desiccant Consult local disposal regulations for more information Inspect each lower...

Страница 45: ...rely tighten all fasteners Caution Heater loops should not touch each other Hot spots lead to premature heater failure 2 Reinstall the wires based on the sketch you made earlier Reinstall the ceramic...

Страница 46: ...failure 6 Reinstall the wires based on the sketch you made earlier 7 Reinstall the ceramic nuts to each heater terminal Replacing Cleaning the Cooling Coils WARNING Hazardous electrical current presen...

Страница 47: ...il out 5 Visually inspect the coil for leaks dirt and ant sign of volatiles 6 Blow the dust out or if the coil is covered with plasticizer steam clean it 7 Place the coil back in its housing Make sure...

Страница 48: ...al cause of the trouble Such hasty substitutions will only destroy the new component Refer to wiring diagrams and schematics Locating mechanical problems should they occur is relatively straightforwar...

Страница 49: ...the thermocouple Dryer Shuts Down Process blower OFF Process heaters OFF Regen heaters OFF Alarm light is ON Alarm horn is ON Make sure the process filter is clean Clean or replace if necessary Double...

Страница 50: ...the thermocouple Dryer Shuts Down Process blower OFF Process heaters OFF Regen heaters OFF Alarm light is ON Alarm horn is ON Make sure the process filter is clean Clean or replace if necessary Double...

Страница 51: ...Check the heaters Replace if necessary PROCESS LOOP BREAK The process drying air temperature has not made any improvement toward the drying temperature set point for more than 480 seconds Check incom...

Страница 52: ...Message ON Alarm horn is ON Check the heater fuses replace if necessary Make sure the wiring is correct and wire connections are tight PROCESS HEATER FAIL The process heater safety contactor is not re...

Страница 53: ...r temperature thermocouple is damaged Replace the thermocouple Dryer Normal Process blower ON Process heaters ON Regen heaters ON Alarm Message ON Alarm horn is OFF Make sure the process air filter is...

Страница 54: ...se to room temperature 70 F 21 C when you short circuit controller input terminals the controller is normal and the sensor is probably broken short circuited or incorrectly wired Other service problem...

Страница 55: ...s void Defective parts become the property of the warrantor and are to be returned immediately without any further use or handling Warranty Liabilities THE COMPANY EXPRESSLY DISCLAIMS ANY AND ALL LIAB...

Страница 56: ...frequency fluctuation Continuous 1 Intermittent 2 10 Nominal supply voltage 460 3 60 Verify on serial number tag 11 Earth ground type TN system has one point directly earthed through a protective cond...

Страница 57: ...trap 7 4 Drawings and Diagrams Figure 12 Standard Model 180 F to 250 F Air Flow Schematic Utilizing 40F dew point air to regenerate and cool the desiccant Double wall constructed heater housing and d...

Страница 58: ...ion temperature Pressure switch makes sure the blower is functioning correctly High temperature snap switches monitor the heat status of the heater housings High pressure peripheral regenerative blowe...

Страница 59: ...neration temperature Pressure switch makes sure the blower is functioning correctly High temperature snap switches monitor the heat status of the heater housings High pressure peripheral regenerative...

Страница 60: ...wer 3 A0568910 1 125 Fuse for the Process Blower 3 A0568911 1 25 Fuse for the Process Blower 3 A0534804 2 Fuse for the Process Blower 3 A0568917 2 5 Fuse for the Process Blower 3 3 3 A0550577 3 Fuse f...

Страница 61: ...603 2500 Watts Heater Element 400 Volts 0 0 3 A0566604 2500 Watts Heater Element 460 Volts 0 0 3 A0566605 2500 Watts Heater Element 575 Volts 0 0 3 A0568139 Screen Cover for the Desiccant Tanks 2 A056...

Страница 62: ...d for the equipment to be returned Reason for requesting the return must be given All returns are to be shipped prepaid The invoice number and date or purchase order number and date must be supplied A...

Страница 63: ...ustomer service Service Department Call toll free 8am 5pm CST 800 233 4819 or call 630 595 1060 Emergencies after 5pm CST call 847 439 5655 We have a qualified service department ready to help Service...

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