service manual dri-eaz desicca
Contents
1. 5 i tee 5 Positioning the Dehumidifier 5 Locating the Dehumidifier 5 Ait Circulation eiie dert eet 6 Duct Connections sssssssssssseeeeeeeenee 6 Connecting the Ductwork ssssssssseeeee 7 Connecting the Power 7 MAINTENANCE cccccccceeceeseeeeeeeceseeeeeeeeeeeeeeeeeeeeseesseenaes 7 Clean the Air 7 Check Reactivation Outlet Temperature 7 Check the Rotor Air 7 Check the Rotor ccc ccececceeececeseeeeeeeeeaeeseaeeseaeeeeaeeesenees 7 Maintenance Quick Reference Summary 8 TROUBLESHOOTING sessssseseeeereneee nnns 8 No Indicator Lights 8 Blower On Light Is Off 8 Heater On Light Is Off 8 Reactivation Outlet Temperature Too Low 8 Poor Dehumidifying 9 Rotor Is 9 Checking the Heater Elements 9 ea aan ardran 10 TROUBLESHOOTING SUMMARY 11 Congratulations on your selection of a new DriTec2. 325 Desiccant Dehumidifier or a DriTec 150 Desiccant De humidifier from Dri Eaz Products Inc It is our goal to offer you the best high performance dehumidifier available We invite your comments and suggestions for modifications and improvements Reading this Owner s Manual will help you achieve maximum benefits from your dehumidifier Read Manual and Safety Information Make sure that all technicians and operators who use the DriTec read and understand the owner s manual prior to operation Pay par ticular attention to the safety information in order to reduce the risk of electrical shock fire or personal injury Inspect on Arrival When your DriTec arrives check immediately for signs of shipping damage If you do notice any damage report it to your supplier and the shipping com pany immediately It is important to save the shipping carton for claim purposes If your DriTec ever needs repairs at a CODVDIAUT A 4000 9nnn NDI CA7 DDONNIICTC ING remote location the unit should be packed and shipped in its original carton INTRODUCTION The DriTec Desiccant Dehumidifier is designed to re duce humidity by removing moisture from the air Proper dehumidification helps to speed the drying of wet carpet cushion floors walls contents and structural materials It also prevents mold and mildew growth caused by moist or humid conditions The DriTec Desiccant can create extremely low humidity conditions and can operate efficientl
3. DRIEAZ OWNER S MANUAL WARRANTY SAFETY OPERATING INSTRUCTIONS MAINTENANCE SPECIFICATIONS TROUBLESHOOTING DRITEC 150 and DRITEC 325 DESICCANT DEHUMIDIFIERS p safety ing p gi Please read before using the dehumidifier and save for future reference PURCHASE DATE SERIAL NO DEALER DRI EAZ PRODUCTS 15180 Josh Wilson Road Burlington WA 98233 www dri eaz com 360 757 7776 TABLE OF CONTENTS INTRODUCTION ie etre iatis 2 WARRANTY atri ete aet qe erg een MT e idees 2 SAFETY INFORMATION 0 ccccceeeeceeeeeeeeeeeeeeeeeeeeseneeteee 3 PRINCIPLES OF 3 Process id ane 3 ReactivationAIp cocto toe te Ren e e ila 4 OPERATING CONDITIONS sse 4 Saturated 4 Lower Levels of Humidity eee 4 Monitoring Humidity 4 Moisture Content of Materials 5 MAIN COMPONENTS 2 eccceeeceeeeceeeeeeeeeeeeeeeeteeeeeneeeeaes 5 Air na a vere 5 Reactivation Air Stream ssssssssssssssssss 5 Rotor Drive en pee epe reete reed ia ee Hore ga 5 Main Controls utet D d e ad aai 5 Indicator Lights E EE 5 INSTALLATION amp
4. Reactivation Air During operation a portion of the rotor is constantly be ing dried or reactivated In the DriTec heated air is di rected to the reactivation sector and is forced through the channels in that portion of the rotor The heated air releases the moisture captured in the desiccant material The moisture is discharged into the heated reactivation air stream and is then vented from the unit to the outdoors As the DriTec operates the rotor slowly turns so that only a portion of the whole rotor is exposed to the heated reactivation air at any one time At this point the moisture has been removed from the room stored on the rotor and then released from the rotor into the outside air The desiccant dehumidification process cycle is complete Here is a quick review of the operation 1 Moist process air is drawn into inlet and through the de humidifier 2 Moisture in the process air is captured on the desiccant rotor and the dry process air is vented through process outlets back into the room 3 Reactivation air is heated within the dehumidifier 4 The wet area of the rotor turns into the reactivation sec tor 5 The moisture in the desiccant rotor is released into the heated reactivation air CODVDIAUT A 1000 9nnn ADI LAF INC 6 The reactivation air laden with moisture is vented through the reactivation outlet to the outdoors 7 The reactivated rotor rotates into position to capture
5. element needs replacing please contact the Dri Eaz Service Department for assistance in determin ing if the element needs replacing SPECIFICATIONS DESCRIPTION DRITEC 325 DRITEC 150 Utilities 230V 1 Ph 50 60 Hz 115V 1Ph 60HZ Air Intake Volume 325 CFM 140 CFM Process Air Volume 250 CFM 110 CFM Reactivation Air Volume 75 CFM 30 CFM Max FLA Use Weight 133 Ib 61 kg 78 Ib 35 kg 24 in 25 5 in 36 5 in Dri Eaz Service Department 360 757 7776 COPYRIGHT 1999 2000 DRI EAZ PRODUCTS INC 10 TROUBLESHOOTING QUICK REFERENCE SUMMARY WARNING All service procedures below are to be executed with power off i e unplugged PROBLEM POWER ON NO INDICATOR LIGHTS DRITEC 325 ONLY BLOWER ON OR HEATER ON LIGHT IS OFF REACTIVATION OUTLET TEMPERATURE TOO LOW SHOULD BE ABOUT 30 F 17 C ABOVE THE TEMPERATURE OF THE ROOM POOR DEHUMIDIFYING PERFORMANCE UNIT IS RUNNING ROTOR HAS STOPPED SOLUTION Check that the unit is plugged in and that the circuit is supplying power to the unit Check the two Main fuses see Fuse Diagram Check fuses Do not replace until determining cause of the fault Always use the same type and rating fuses Check for blocked reactivation air stream Check for correct line voltage 10 Check heating elements and blower motor Check for source of increased moisture in the space being processed such as ducting leaks open doors or windows etc
6. loosely It is not necessary to disconnect any wires 3 Place a 5 high block of wood under the front edge of unit for support Remove the cover screws and lift the cover straight up being careful not to damage any foam edge seal 4 Air flow through the rotor is controlled by a system of air seals Inspect the air seals for any signs of abrasion or cuts Be sure the outer surface of the seals are smooth If the seals must be replaced please contact the Dri Eaz Service Department Check the Rotor 1 With the cover removed pull back the tensioner to loosen the drive belt Check the drive belt for signs of wear The belt should be flexible Replace the belt if it is stiff or cracked 2 Remove the belt from the drive sprocket on the motor Turn the rotor by hand and make sure it turns smoothly though with some drag If the rotor does not turn smoothly the seals may be worn 3 Check the rotor for passages clogged by dirt or dust To inspect the passages hold a 60 watt bulb behind the ro tor If the passages are clear the light from the lamp should shine through the rotor If any part of the rotor is plugged you will see a dark area Inspect and clean the rotor once per year when operating under normal conditions and more if the unit is operating in a dusty environment Despite the in line filter the rotor can pick up dirt and dust resulting in reduced water extraction 4 Clean the rotor if it seems dirty or clogged Use a va
7. the DriTec Desiccant together with refrigerant units to speed the drying process In these conditions the DriTec removes wa ter as well as a comparable refrigerant unit Also it is actu ally more cost effective For example a 25 gallon day refrigerant dehumidifier that costs 2 195 removes water at 87 80 per gallon The 48 gallon day DriTec 325 that costs 3 699 is removing water at 77 06 a cost savings of over 10 gallon Lower Levels of Humidity When the relative humidity falls to 40 a refrigerant dehumidifier will remove little additional water At this point many materials in the room such as carpets and wall surfaces may feel dry but moisture may remain in structural materials Ceilings walls and structural flooring materials typically take longer to dry The DriTec Desiccant is supe rior for drying these materials It has the capability to lower humidity over time to below 1 Rh The low humidity envi ronment created by the DriTec speeds the drying of struc tural materials which dry very slowly in conditions of normal comfortable humidity The DriTec Desiccant also can be more cost effective than refrigerant dehumidifiers in low temperature condi tions The DriTec continues to remove moisture at tempera tures down to freezing so it may be effective even in un heated buildings Monitoring Specific Humidity Changes For fast and complete drying the specific humidity in the area being dried should be monitore
8. the front panel Power Light On when power to the unit is connected Unit On Light On when main switch is turned to On or Option and the unit is operating Blower On Light On when main switch is turned to On shows that the blower is operating Stays on during cool down period after switch is turned off about 5 minutes while blower and drive motor continue to operate until automatic shut off Turns Off if the blower circuit is over loaded and open Heater On Light On when main switch is turned to On shows that the heater is operating Like the blower light stays on during the 5 minute cool down period Turns Off if the heater circuit is overloaded and open Heating System The heating system uses unique PTC heating elements which eliminate the need for conventional components for temperature control and thermal safety PTC means positive temperature coefficient the element is a ceramic semi conductor These elements have a self regulating feature which controls the output of the elements based on the re quired temperature For instance if the reactivation airflow is reduced the heater elements will react rapidly to the higher temperature with an increasing electric resistance and automatically reduce the heat output An overheating protection thermostat is therefore not needed INSTALLATION amp STARTUP Inspection When the unit arrives check immediately for signs of shipping damage If you
9. to catch dirt in the air stream Process Air Outlets Process air is vented from the DriTec through one or two outlets one of which is adjustable with a slide lever Reactivation Air Stream The reactivation air stream uses approximately one third of the total air stream which flows through electrical heating elements and then through the rotor where the heat reacti vates the desiccant The air stream then passes through the reactivation outlet and is vented through ducting to the out doors Rotor Drive The rotor is turned by a small drive motor and belt A spring type tensioner automatically adjusts the belt tension DriTec 150 Controls The DriTec 150 is controlled by an on off rocker switch on the front panel The switch is lighted red with the unit is on and operating DriTec 325 Controls The controls for the DriTec 325 are located on the front panel The main power switch has three positions CODVDIAUT A 4000 9nnn NDI CA7 DDNNIICTC INC On DriTec Desiccant operates continuously Off Control system turned off When the switch is turned to Off after the unit has been running the blower and drive motor continue to run for 5 minutes to cool down the unit Then the unit automatically shuts off the blower and drive motor Option Provided only for use with a remote dehumidi stat which is not included with this unit Indicator Lights DriTec 325 only The DriTec 325 has four indicator lights located on
10. will any credit be given until the parts are received Please direct questions on the warranty to an authorized distributor or Dri Eaz Products Inc at 360 757 7776 If damage was sustained during shipping be sure to retain the shipping materials for a possi ble freight damage claim SAFETY INFORMATION Dri Eaz is concerned about the safety of anyone who uses or performs maintenance on the DriTec Desiccant unit It is dangerous for an untrained individual to attempt to use or perform maintenance on the unit Throughout this manual we point out some of the precautions which should be taken in use or maintenance of the We use three different kinds of messages to warn you of possible problems or precau tionary measures Danger Immediate hazard which will result in severe personal injury or death Warning Hazard or unsafe practice which may result in severe personal injury or death Caution Hazard or unsafe practice which could result in personal injury or property damage Please keep these points in mind as you use or service the unit Never use the DriTec 325 or the DriTec 150 without a proper extension cord Do not use the 325 with any exten sion cord other than the one available from Dri Eaz Prod ucts Use of any other extension cord may cause an electrical short or fire hazard e Never alter the grounding plug or remove it from the electrical cord Do not use an adapter that defeats the dehu midifier s ele
11. Check for failed heater elements Check that the blower wheel is turning freely Check for blocked air filter blocked air inlet or blocked air outlet s Check for increased humidity loads Check the process space for open doors leaks the duc twork etc Check for low temperature at the reactivation outlet Check the heating elements Check for rotation of rotor Check fuses Do not replace until determining cause of the fault Always use the same type and rating fuses Check drive belt and motor Check for worn seals Dri Eaz Service Department 360 757 7776 COPYRIGHT 1999 2000 DRI EAZ PRODUCTS INC 11
12. area Air Intake Clearance Allow at least 7 clearance between the air intake on the back of the unit and any wall Never allow any materials such as draperies to obstruct the air inlet or outlets This could cause the unit to overheat and result in a fire or elec trical hazard Air Circulation A desiccant dehumidifier operating in an area such as a basement will have little effect in drying an adjacent en closed area such as a closet unless there is adequate circu lation of air in and out of the adjacent area Open interior doors and operate Dri Eaz TurboDryers to maintain good air movement Doors may need to be braced to prevent them from closing as a result of air movement In the case of indi vidual rooms being dried all doors and windows should be kept closed There are times when you will want to use special tech niques to reduce the volume of airspace to be dried These techniques will be advantageous when drying dense materi als such as hardwood flooring They are especially helpful when these materials are located in a high air volume struc ture such as a gymnasium The basis of this technique is to reduce the amount of air space around the wet materials so the volume of air to be dried is reduced One method is to make a plastic tent over the wet materi als then direct the dry process air under the plastic tent Use 4 6 mil plastic taped over the area Leave two openings one for the process airflow and another o
13. ated it is too damp for most space heating purposes Normally the reactivation air should be vented directly outdoors 3 Protect outlets Wherever an outlet duct opens to the outdoors protect it from the elements Install weather hoods to prevent water from running into the dehumidi fier and screens to prevent birds or rodents from entering the unit 4 Duct connection clearances Allow the following clear ances for the intake and outlets Air Intake Allow at least 7 clearance from nearby walls for process intake Process Outlets The DriTec 325 connects to 5 or larger round ductwork The DriTec 150 connects to 4 or larger round ductwork e Reactivation Outlet Both the DriTec 325 and DriTec 150 connect to 4 round ductwork Always vent to out side area Connecting the Power Electrical Connections DriTec 325 The power cord on the DriTec 325 should be plugged into a 230V 50 60Hz 30 outlet The Unit On light will indicate when there is power to the unit The voltage to the unit should not vary by more than 10 2 Electrical Connections DriTec 150 The power cord on the DriTec 325 should be plugged into a 115V 60Hz 15A outlet 3 Start the unit Turn the switch to On to start the unit Look through the process outlet grills to check the rotor rotation The rotor should start turning clockwise as you view it through the process outlet grills If the unit does not start refer to the Troubleshooti
14. c uum with a soft bristled dusting brush attachment Vacuum both surfaces of the rotor 5 If you cannot clear the rotor using the vacuum you may use compressed air to help the process Do this care fully so that you do not damage the rotor The compressed air should be dry and free of oil Do not use a pressure higher than 30 PSIG Use compressed air on one side of the rotor and the vacuum on the other side Do not hold the compressed air closer than 12 inches from the face of the rotor Do not wash the rotor with any solvent Improper cleaning can permanently damage the rotor 6 If the rotor is still is still plugged please call the Dri Eaz Service Department Maintenance Quick Reference Summary Air Filter nspect and clean as necessary Reactivation Outlet Temperature Should be approximately 30 F 17 C higher than the ambient air temperature in the room Seals Check for excessive wear Rotor Check for rotational binding Check that rotor is not plugged with dirt TROUBLESHOOTING Any troubleshooting procedure requiring that the unit be plugged in to a power source while the cover is removed should be done only by a qualified service technician Danger Do not work with the electrical parts unless you are a quali fied service technician No Indicator Lights DriTec 325 only Check the AC power distribution Check the power cord into the unit and check the two Main 30A fuses in the DriTec Desicca
15. ctrical grounding This could cause an electri cal shock or fire hazard Do not use the unit for any reason if it cannot be properly grounded Never operate the unit in standing water because of the risk of serious electrical shock hazard The unit may be oper ated on damp surfaces but not in standing or pooled water e Never allow any materials such as draperies to obstruct the air inlet or outlets This could cause the unit to overheat and result in a fire or electrical hazard Never allow children to play on or around the unit Be sure the unit is inaccessible to children when left unattended Children could seriously injure themselves or others by playing with or around the unit Never operate or store the unit outdoors or otherwise expose the unit to water The housing is not waterproof and water allowed inside the unit could cause an electrical shock CODVDIAUT A 9nnn ADI CA7 1 INC hazard or damage to the unit If electrical components be come wet allow the unit to dry thoroughly before operating Never insert any implement or device into the unit when it is operating which could cause an electrical shock or damage to the unit Never operate the unit with a damaged electrical cord or plug which could cause a severe electrical shock or fire haz ard Visually inspect the electrical cord and plug for damage before each use Never direct fogged chemicals or chemicals of any type
16. d Specific humidity measurements can be obtained using a thermo hygrometer such as the DHT 600 to obtain relative humidity and tem perature of the ambient air plus a Psychrometric Calculator or Chart Specific humidity readings measured in grains per pound give a true indication of the amount of moisture in the air Relative humidity readings alone is not useful infor mation unless the temperature is always the same wherever and whenever a measurement is taken This is seldom or never the case in water damage restoration Moisture Content of Materials The moisture content of structural materials should also be monitored with a moisture meter such as the MoisturePro A moisture meter indicates the extent that these materials are wet It will assist you and your customer in determining when the job is completely finished A variety of moisture meters are available from Dri Eaz Products MAIN COMPONENTS Figure 1 shows most of the important parts of the DriTec Desiccant Dehumidifier the rotor process air stream and reactivation air stream The DriTec Desiccant has seals sepa rating the two streams of air the damp process air and the heated reactivation air Notice that the two air streams move through the DriTec Desiccant in opposite directions Air Filter If the air in the room is dirty the dirt can collect in and plug the passages of the rotor A cleanable foam air filter is placed on the intake side of the rotor
17. do notice any damage report it to the shipping company immediately Notify Dri Eaz Prod ucts Inc about the damage as soon as possible If the unit is damaged do not discard the original packaging Positioning the Dehumidifier The dehumidifier should be operated in a closed sys tem to achieve maximum efficiency That is all doors windows and other openings to the outside should be closed tightly with the exception of an opening for the reactivation outlet wet air duct Locating the Dehumidifier There are two options for locating the dehumidifier Typically it will be placed directly in the humid environ ment This allows the process air to be drawn from that area dried and then returned to the same room In other cases place the dehumidifier in a separate area and duct the dry air to the damp area for example when attempting to dry an attic or a crawl space under a building Operate the dehumidifier inside the building and duct the dry air directly into the attic or crawl space When drying an area with no inside access it is some times possible to vent dry air through a heat or ventilation register opening To do this direct the process air duct into a register and temporarily disconnect any ducting so the dry air is released into the area to be dried The DriTec has two process output vents This allows ducting into two areas at one time or leaving one vent open to the room while ducting the other to a second
18. eratures of 150 F 66 C or above A slide lever can be used to close the right hand outlet partially or completely Use this to balance airflow when ducting from just one outlet Normally duct from the left hand outlet no slide lever and adjust the other that is venting into the room Reactivation Outlet Ducting The wet reactivation air should always be vented via ducting to the outside There are several methods of locating the react duct outlet to vent outdoors The simplest method is to attach it to a clothes dryer vent If a dryer vent is not available you can fashion your own window connection panel that permits the duct to vent through an open window A handy window connection kit called the TecVent will be available from Dri Eaz in the fall of 1999 Caution Never allow condensate water which may collect in the reactivation duct during operation to run back into the unit This could cause a shock hazard or damage to the unit Keep at least part of the ducting lower than the reactivation outlet at all times Condensation may occur inside reactivation ducting un der cold ambient conditions Avoid any bends or sags where water can collect in the ducting Keep part of the ducting lower that the reactivation outlet on the back of the unit to prevent condensed water from running back into the unit If enough condensed water collects and blocks the air flow the unit can shut itself down Ducting Length The amount
19. he room air Think of the excess moisture as cooling off the stream of heated air Is there some reason why the air in the system has suddenly become much more humid The change could be overloading the DriTec Desiccant 3 Check the heating elements One of the heating ele ments may have stopped working See Checking the Heating Elements 4 Check the blower A low outlet temperature can also be caused by a problem with the blower Turn off and unplug the DriTec Desiccant and check to make sure that the blower wheel can turn freely Poor Dehumidifying Performance 1 Check the air filter If the filter is dirty clean it as de scribed in the section titled Cleaning the Air Filter 2 Check inlet and outlets make sure that obstructions are not blocking air flows Caution Excessive moisture buildup in the reactivation ducting could cause blockage of the airflow 3 Has the moisture load increased Has something changed in the process space which could have in creased the moisture load on the unit Check all open ings into the process space to be sure all doors and windows are closed Make sure that doors to the outside are opened as infrequently as possible Check for leaks in the ductwork CODVDIAUT A 4000 9nnn ADI CA7 DDNNIICTC INC 4 Check temperature of reactivation air It should be about 30 F 17 C higher than the temperature of the room air If it is not see the section titled Reactivation Outlet Tempe
20. iTec 325 only The DriTec 150 does not include a fuse Warning Replacement fuses should have the same amperage maximum voltage and interrupt capacity ratings rating fuses 2 Check the reactivation air stream The most common cause for overheating is a blockage in the reactivation air stream 3 Check the line voltage The heating elements may also overheat if the AC line voltage rises much above the specified 230 volt AC The line voltage should be 230 volts 10 4 Check blower A jammed or slow turning blower wheel can lead to overheating Turn off and unplug the DriTec Desiccant Check to make sure that the blower wheel can turn freely Check the motor for short circuit or open circuit or for any mechanical problem that might keep it from turning freely 5 Restarting the unit Do not attempt to restart the unit until it is determined what caused the fault condition and corrective action is taken Reactivation Outlet Temperature Too Low 1 Check the reactivation outlet air The air at the outlet for the reactivation air should be about 30 F 17 C higher than the temperature of the room air This meas urement gives you a way of making a quick check of the overall operation of the DriTec Desiccant 2 Increased moisture load If the unit is overloaded and is trying to move too much moisture the temperature at the outlet will drop below the desired reading of about 30 F 17 C higher than the temperature of t
21. into the unit which could cause a fire hazard or damage to the unit e Never operate the unit in temperatures above 105 F 41 C which could cause damage to the desiccant rotor or electrical components Never allow condensate water which may collect in the reactivation ducting during operation to run back into the unit This could cause a shock hazard or damage to the unit Keep at least part of the ducting lower than the reactivation outlet at all times Never operate the unit without the air filter which could cause damage to the desiccant rotor from contaminants e Never open the unit cover with the power connected which could cause an extreme electrical shock hazard The power source provides enough voltage and current to cause death or severe burns Always turn off the power before you work inside the unit Do not work with the electrical parts unless you are a trained electrician e Never wash the rotor with any solvent This could per manently damage the rotor Always ensure that correct voltage is used Failure to do so could cause an electrical shock or fire hazard Always secure the unit to prevent sliding when trans porting in a vehicle which could cause injury to vehicle occupants or damage to the vehicle or unit PRINCIPLES OF OPERATION DriTec Desiccant Dehumidifiers are designed to reduce humidity by removing moisture from the air This helps to dry wet carpets cushions floors walls contents and
22. more moisture OPERATING CONDITIONS The DriTec Desiccant Dehumidifier effectively removes moisture at virtually any job temperature without the freeze up problems associated with refrigerant dehumidifiers Low temperature operation is one advantage of using desiccant technology The DriTec dramatically reduces ambient humidity to very low levels not obtainable with refrigerant dehumidifi ers This allows faster and more thorough drying of dense materials like hardwood flooring and structural woods The DriTec also uses improved technology that removes humidity When a desiccant dehumidifier is first put into operation in a saturated environment it will constantly re duce humidity Its rate of water removal is determined by the volume of the area the environmental conditions and the capabilities of the machine Saturated Environments On many restorative drying jobs the initial humidity is very high as porous materials like carpet and cushion give up moisture to the air However as the job progresses and humidity levels fall moisture may need to be evaporated from less porous materials including drywall and wood Refrigerants are most effective when both humidity and temperature are high They are much less effective in ambi ent conditions under 50 relative humidity or 50 F 10 C Desiccant dehumidifiers are generally effective in all ranges of temperature and humidity In saturated environments it is often helpful to use
23. ng section MAINTENANCE The DriTec Desiccant requires very little regular mainte nance Check the following points every 30 days when using the unit on a regular basis or as needed Clean the Air Filter CODVDIAUT A 4000 9nnn NDI CA7 ICTQ INC Remove the filter from the filter shroud by inserting a finger or screwdriver into the access hole at the bottom of the filter shroud and pushing up To clean the filter use a light vacuum or wash with water and mild detergent Spray directly against the foam in the direction of the air flow Be gin at the top of the filter and work down Allow the filter to drain before reinstalling it in the filter shroud Check Reactivation Outlet Temperature After the unit has been operating for 30 minutes the temperature at the outlet of the reactivation air stream should be about 30 F 17 C higher than the temperature of the room air Check this outlet temperature with a thermometer If the outlet temperature varies significantly from the above see the section on Troubleshooting Warning Always ensure that correct voltage is used Failure to do so could cause an electrical shock or fire hazard Check the Rotor Air Seals 1 Turn off all power to the unit see ELECTRICAL DANGER note Unscrew the four fasteners holding on the front panel and remove to expose the front side of the desic cant rotor 2 DriTec 325 only Remove the two control panel screws and let the panel hang
24. nt unit BLOWER ON Light Is Off DriTec 325 only 1 Check the fuses If the blower light is off with the power switch in the On position a fuse may have blown Do not replace the fuse until you have checked to determine what caused the fault Always use the same type and rating fuses 2 Check the heating elements for electrical short see below 3 Check the line voltage A fuse may have blown if the AC line voltage varies considerably from the specified 230 volt AC The line voltage should be 230 volts 10 4 Check the blower Turn off and unplug the DriTec Desiccant Check to make sure that the blower wheel can turn freely Check the motor for short circuit or CODVDIAUT A 9nnn ADI CA7 DDNNIICTC INC open circuit or for any mechanical problem that might keep it from turning freely 5 Restarting the unit Do not attempt to restart the unit until it is determined what caused the fault condition and corrective action is taken HEATER ON Light Is Off DriTec 325 only 1 Check the fuses If the heater light is off with the power switch in the On position a fuse may have blown Do not replace the fuse until you have checked to determine what caused the fault Always use the same type and i amp ih E BUSAN LPOC MO TRAMSEDRIMER PRIMARY FHACISN BLUESMAN BLOWE LPC HEATER Fuse Diagram for Dr
25. of air flow through the react and process ducting is dependent upon its diameter length interior wall surface conditions and configurations For this reason the length of ducting which can be used with the desiccant is determined by the type of ducting and the number of bends or curves in the ducting The less restricted the airflow the better the perform ance of the unit It is not recommended that you use over 30 ft of straight run process air ducting and not over 60 ft of straight run react air ducting When using over 20 ft of react air ducting condensation which can collect in bends or when the ducting is in contact with cool surfaces can become a problem The opportunity for condensate to collect in the react ducting is greater as the length of the ducting is in creased Warning Never operate or store the unit outdoors or otherwise ex pose the unit to water The housing is not waterproof and water allowed inside the unit could cause an electrical shock hazard or damage to the unit If electrical components be come wet allow the unit to dry thoroughly before operating Connecting the Ductwork There are some simple rules for arranging the ductwork for the DriTec Desiccant Dehumidifier 1 The process air outlet may be vented to the area to which is being dried 2 The reactivation air outlet can be very damp so it should be vented to a space where this moisture is not a problem Even though this air is he
26. omer is responsible for all labor and shipping charges after one year 7 Year Housing and Frame Warranty Dri Eaz will repair or replace at its option parts necessary to correct the housing and frame from metal cracks weld separations or defects in materials and workmanship for a period of 7 years from purchase date The customer is responsible for all la bor and shipping charges after one year Limitations This warranty shall not extend to any prod ucts showing effects of misuse disassembly alteration lack of proper maintenance corrosive chemicals improper volt age accident damage unauthorized repairs use of other than genuine parts and materials fire flood normal wear or any other causes beyond Dri Eaz Products control The warranty obligation extends only to the repairs or replacement of parts found upon Dri Eaz Products examination to be defective The foregoing constitutes the entire warranty and no other warranty liability contingency or responsibility di rect indirect consequential or in any way connected with the sale or operation of equipment products is expressed or implied This warranty gives you specific legal rights You may have additional rights under law which vary from state to state To receive warranty service You must write in or call for a Return Authorization No parts will be accepted with out the serial number of the equipment the part was taken out of and an authorization number nor
27. pening on the opposite side for damp air to escape The amount of airspace between the surface of the wet materials and the plastic will vary de pending on the size of the area The wet materials are dried while minimizing dehumidification and energy use Duct Connections This unit is designed to be operated with ducting Duct ing is used both to carry the wet reactivation air away out of the structure and to vent the dry process air to particularly wet areas There are several different ways to use the ma chine and ducting Caution Because air conditions inside ducting can reach temperatures of 150 F 66 C use only appropriately rated ducting Process Outlet Ducting CODVDIAUT A 4000 9nnn ADI CA7 ICTQ INC When drying an area such as a room it is not necessary to use ducting on the process out dry air In this case the de humidifier will vent dry air directly from the machine into the room In some instances however you may want to di rect the airflow towards a specific area This can be done using the process out ducting available from hardware stores or from Dri Eaz Products The duct outlet can be lo cated near a slow drying piece of furniture or section of wall or flooring to achieve faster drying of that area The double process output vents allow for two ducts run ning from the machine or one duct opening into the room while the other is ducted to another area Use 5 inch ducting rated for temp
28. rature is Too Low 5 Check heating elements One or more of the heating elements may not be working See the section on Checking the Heating Elements 6 Rotor has stopped The rotor may be stopped See the next section Rotor Is Stopped 1 Problem with the drive Remove the belt from the drive rotor on the motor Set the switch to the On po sition to turn on the unit The drive motor should turn slowly For information on removing the motor please contact the Dri Eaz Service Department at 360 757 7776 Any troubleshooting procedure requiring that the unit be plugged in to a power source while the cover is removed should be done only by a qualified service technician 2 Check the seals After long use the seals may wear and the rotor will not turn easily Check the condition of the seals The surface of the seals should be smooth If the seals must be replaced please contact the factory for in structions Checking the Heater Elements 1 The PTC heating elements are located behind the front panel just below the process outlet 2 Turn off all power to the unit see ELECTRICAL DANGER note Unscrew the four fasteners holding on the front panel and remove to expose the heater box 3 Disconnect the wire leads from the heater elements Check the resistance across each of the heating elements using an Ohmmeter If an open or shorted condition is found the element needs to be replaced If you are not certain if the
29. struc tural materials It also prevents mold and mildew growth caused by moist or humid conditions Figure 1 shows how DriTec Desiccants remove moisture from the air The heart of the system is the rotor which has a series of air passages or channels Air can be forced through these channels in either direction The passages inside the rotor are coated with a special silica gel substance which is a desiccant a material with a unique affinity for water When damp air passes through rotor the desiccant material adsorbs or captures the water vapor thus drying the air The DriTec s desiccant material employs rare metal technology to increase the attraction of water to the silica gel Process Air When in use the DriTec Dehumidifier draws in air from a room through the air inlet This air passes through the hon eycomb channels of the rotor As this happens the desiccant material captures most of the moisture present in the air Once this process air has been dried out it is vented back into the room As the rotor captures water vapor from the air it be comes saturated with water The saturated rotor eventually loses its ability to capture additional moisture The process of removing this water from the rotor is called reactivation PROCESS AIR INLET PROCESS AIR QUTLET REACTIVATION AIR OUTLET ROTOR REACTIVATION HESTER DESICCANT DEHUMIDIFIER OPERATION DriTec 325 shown dual air outlets
30. y in very low tempera tures These two benefits of the desiccant dehumidifier are not possible with refrigerant dehumidifiers Your DriTec Desiccant Dehumidifier is durable and sim ple to operate needing very little maintenance The DriTec can give you years of trouble free service if you follow the recommendations in this manual We strongly advise that you read and study the manual You will learn how your desiccant dehumidifier works and how to get the best service from your DriTec Desiccant If you do not understand something in this manual or if you have a question about your dehumidifier call the Serv ice Department at Dri Eaz Products 360 757 7776 WARRANTY Please stop before proceeding to complete the warranty card enclosed with the unit Return the card promptly to Dri Eaz Products 1 Year Comprehensive Warranty Dri Eaz Products Inc promises to the original purchaser to repair or replace any part of a DriTec Desiccant Dehumidifier that proves to be defective in workmanship or materials for a period one year from the date of purchase During the first year Dri Eaz Products Inc will cover all material labor and shipping costs to and from the service center 5 Year Rotor Warranty Dri Eaz promises to the origi nal purchaser to repair or replace at its option parts neces sary to correct any desiccant rotor found to be defective in materials or workmanship for a period of 5 years from date of purchase The cust
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