Munters DEW-300 Operating And Maintenance Manual Download

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OPERATING AND MAINTENANCE MANUAL

MODEL: HC-300 / DEW-300

Section 1

Operating and Maintenance Text

Section 2

General

Arrangement Drawing ................................................................................... 74119

Wiring Diagram 208-240 /1/ 50/60 .............................................................................. 50339

Wiring Diagram 208-240 /3/ 50/60 .............................................................................. 50340

Wiring Diagram 380-415 /3/ 50/60 .............................................................................. 50341

Wiring Diagram 460 /3/ 50/60 ..................................................................................... 50342

Wiring Diagram 208-240 /3/ 50/60 .............................................................................. 50344

Section 3

Replacing Fusible Links

Humidistat

Field

Connections ..................................................................................... 26992

Blastgate

Installation Instructions ............................................................................... 27110

Recommended

Spare

Parts List ................................................................................ 21239

Summary of Contents for DEW-300

Page 1: ...b Wiring Diagram 208 240 1 50 60 50339 c Wiring Diagram 208 240 3 50 60 50340 d Wiring Diagram 380 415 3 50 60 50341 e Wiring Diagram 460 3 50 60 50342 f Wiring Diagram 208 240 3 50 60 50344 Section 3 a Replacing Fusible Links b Humidistat Field Connections 26992 c Blastgate Installation Instructions 27110 d Recommended Spare Parts List 21239 ...

Page 2: ...OPERATING AND MAINTENANCE MANUAL MODEL HC 300 DEHUMIDIFIER Rev 6 0 1 21 ...

Page 3: ......

Page 4: ...ANCE 4 1 4 1 Clean the Air Filters 4 1 4 2 Check the Honeycombe Wheel 4 1 4 3 Check the Upper and Lower Air Seals 4 1 4 4 Check the Reactivation Outlet Temperature 4 1 SECTION 5 TROUBLESHOOTING 5 1 5 1 Possible Trouble Conditions 5 1 5 2 Auto Off Manual Switch is Set to Auto Running Light Does Not Come On 5 1 5 3 Fault Light is On and Machine Should Be Running 5 1 5 4 Reactivation Outlet Temperatu...

Page 5: ... 1 3 Controls and Indicators 1 3 Fig 1 4 Front View Cover Open 1 4 Fig 3 1 Dimensions 3 1 Fig 3 2 HC 300 Installed in Process Space 3 2 Fig 3 3 HC 300 Installed Outside of Process Space 3 3 Fig 3 4 HC 300 Installed with Existing Air Handling Unit 3 4 Fig 3 5 Do Not Install HC 300 This Way 3 5 ...

Page 6: ...igure 1 1 shows how the HC 300 removes moisture from the air The heart of the system is the HoneyCombe wheel The detail in Fig 1 1 shows the structure of the wheel As you can see the wheel has a series of air passages or channels The pas sages inside the wheel are coated with a special substance called a desiccant When this substance contacts damp air it soaks up moisture When the desiccant is hea...

Page 7: ...0 both actions are happening at the same time on different sections of the wheel 1 2 ABOUT THE HC 300 This is a simplified explanation of the operating principle Figure 1 2 shows how we put this principle to work in the HC 300 You can still see the parts we discussed in the last Figure the HoneyCombe wheel process air stream and reactivation air stream We have also added a number of other parts Tw...

Page 8: ...d down the unit will become inactive Manual position amber This indicator is on whenever the HC 300 is operating in the manual mode The unit runs continuously until it is switched off Running light green This indicator is on whenever the unit is running the Auto Off Manual switch is in the Manual position or the switch is in the Auto position and the humidistat contacts are closed Fault light red ...

Page 9: ...ms A temperature switch TS01 is located just downstream of the heater This sensor will tell the control circuits if the elements overheat temperature above 320 F If this happens the Fault indicator will light and the machine will stop To reset the machine wait until the unit cools to normal temperature Turn the Auto Off Manual switch off then on again The wiring for each heating element includes a...

Page 10: ...rd or unsafe practice which could result in minor personal injury or property damage Please keep these points in mind as you use or service the unit The HC 300 is wired for 208V to 480V AC The unit can produce enough voltage and current to kill you or cause severe burns Do notworkwiththeelectricalpartsunlessyouareatrainedelectrician Always turn off the power before you work inside the unit There s...

Page 11: ...umidistat contacts close The motors on the blowers have internal over current protection If one of these blowers is overloaded the affected motor will turn itself off This over current protection will reset automatically so the blower may start without warning You can avoid either kind of problem if you turn off the power before working on the unit This type of wheel is washable It is best to clea...

Page 12: ...lt and rollers are free of grease Be sure the HoneyCombe wheel can be turned by hand with some resistance with the belt removed Ensure that the process and reactivation air filters are in place 3 2 POSITIONING THE UNIT 1 Figure 3 1 shows the dimensions of the HC 300 unit You must allow three clear ances around the unit a 24 space in front of the unit so you can remove and replace the HoneyCombe wh...

Page 13: ...be taken from and returned to an indoor space where the temperature and humidity levels are not important 4 Wherever the intake or outlet ducts open outdoors protect them from the elements Install weather hoods and bird screens 5 Do not locate the intake and outlet for the process air too close together If possible allow a distance of at least 5 feet Allow the same distance between the inlet and o...

Page 14: ...up allows the air handling unit to heat or cool the processed air after it leaves the HC 300 7 On some installations makeup air is taken from outside the process space and added to the process air stream Unconditioned makeup air can add a moisture load to the HC 300 and this can overload the unit For recommendations consult the Service Operations Department at Munters 3 3 CONNECTING THE DUCTWORK 1...

Page 15: ...er moves horizontally 3 The ductwork for the reactivation air outlet should always be insulated This will re duce condensation of the moisture in this air stream Run the reactivation ductwork so that it slopes away from the dehumidifier This way any condensed moisture will run away from the dehumidifier On this type of installation the unit should be installed at least 3 feet above the floor to al...

Page 16: ...3 5 PART A PART B FIGURE 3 5 DO NOT INSTALL THE HC 300 THIS WAY ...

Page 17: ... whenever the Auto Off Manual switch is set to Manual Other units are set up for automatic cycling In an installation of this type the HC 300 is controlled by a device called a humidistat The humidistat works much like the thermostat in a home heating system When the humidity rises above a pre set point the humidistat turns on the HC 300 2 The humidistat should be designed to operate at 24 V AC Us...

Page 18: ... Wait ten minutes before checking the reactivation outlet temperature again If it is still above 120 F open the process damper and wait again Continue doing this until you find the setting which causes the reactiva tion temperature to drop to 120 F This is the correct setting for the process damper 7 When the process damper is set correctly the temperature at the reactivation outlet will be 120 F ...

Page 19: ...3 8 ...

Page 20: ...rsing Steps 2 and 3 above 4 2 CHECK THE HONEYCOMBE WHEEL Check the HoneyCombe wheel to be sure it is rotating correctly Look for signs of discoloration caused by dirt dust or other foreign materials In order to clean the wheel and inspect the seal you must remove the drive motor and wheel See the instructions in Section 5 10 Checking the Drive Motor Wheel and Seals 4 3 CHECK THE UPPER AND LOWER AI...

Page 21: ...4 2 ...

Page 22: ...dy to operate turn the Auto Off Manual switch to the Manual position 5 2 AUTO OFF MANUAL SWITCH IS SET TO AUTO RUNNING LIGHT DOES NOT COME ON This service procedure involves an electrical hazard Service work should only be done by an electrician who has been qualified by Munters 1 Be sure the unit is receiving power Check the circuit breaker or fuse which supplies the unit The unit also has an int...

Page 23: ...ny duc twork This can allow too much process air through the unit See the material on Adjusting the Dampers in the section on Installation and Start Up 3 If the unit is overloaded and is trying to remove too much moisture the temperature at the outlet will drop below 120 You can think of the excess moisture as cooling off the stream of heated air Is there some reason why the air in the system has ...

Page 24: ...vation air It should be 120 F 5 If it is not see the section on Reactivation Outlet Temperature is Too Low 6 One or more of the heating elements may not be working See the section on Checking the Heating Elements 7 If the process blower is overloaded it will shut down automatically This will prevent the unit from drying the process air The motor will restart automatically once it has cooled 8 The ...

Page 25: ...es a fusible link Once one of these links opens it will cut off power to the element Check across each fusible link with an Ohmmeter A failed link will appear as an open circuit 5 Check for a problem with the thermistor TSE1 for the power controller SSP1 If this thermistor open circuits or shorts the SSPC will not produce any output for the heating elements Substitute a new part 5 8 CHECKING THE T...

Page 26: ...4 Remove the motor and drive assembly This is mounted on the right hand roller wheel assembly 5 Remove the small roller wheels which are located on each side of the Honey Combe wheel To remove a roller wheel lift the wheel shaft up Pull the bottom of the shaft toward you then down 6 Gently lift the wheel a bit and pull it forward Be careful not to damage the lower seals 7 The small passages in the...

Page 27: ...ensitive to high pH alkaline condition Choose a detergent which with a neutral pH Do not use typical laundry detergents Do not use any solvent to wash the wheel This will permanently damage the wheel 11 If the wheel is still plugged or if the honeycomb structure has softened please call the Service Operations Department at Munters 12 To replace the wheel reverse Steps 2 through 6 above ...

Page 28: ...e unit as shown below The pressure differential switch senses the pressure difference between the inlet and outlet of the reactivation air stream measured across the wheel The switch has tubing connections to both sides of the desiccant wheel in the reactivation zone When operating conditions and air flows are normal the pressure drop across the wheel is above the setpoint for the flow switch The ...

Page 29: ...vation outlet temperature The setpoint for the pressure differential switch is set at the factory The setpoint should not be adjusted Unauthorized changes to the setpoint may damage the HC 300 and or void the warranty Added to Section 5 5 Poor Dehumidification Performance This can be caused by insufficient reactivation air flow Limited reactivation air flow can cause the pressure differential swit...

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Page 36: ...Replacing Fusible Links Revision 7 11 ...

Page 37: ...NSULATED FEMALE TERMINALS 12 REPLACE FUSABLE LINK WITH NEW FUSE SUB ASSEMBLY BY REINSTALLING FEMALE TERMINALS TO SYSTEM TABS 13 REPEAT STEPS 8 THROUGH 12 FOR THE SECOND REPLACEABLE FUSE 14 BOTH FUSE ASSEMBLIES MUST BE INSIDE THE INNER REACTIVATION CHAMBER BEFORE REINSTALLING THE METAL MESH FILTER 15 REASSEMBLY REVERSE STEPS 1 THRU 6 Replacing Fusible Links Revision 7 11 ...

Page 38: ...tat Field Connections G HSP1 Input Plug HUMIDISTAT VICONICS P 2 P 1 P 3 G HSP1 Input Plug HUMIDISTAT Regin P 1 P 2 P 3 DEH COM PWR DEH 1 2 HSP1 Input Plug HC 150 300 Regin Humidistat p n 90485 xx All Dashed Wiring by others All Dashed Wiring by others ...

Page 39: ... COM PWR DEH All Dashed Wiring by others Direct Connect to HC 150 300 Circuit Board PCB1 Main Unit Circuit Board E19 E20 Board Ground lug or mounting post G HSP1 Input Plug HUMIDISTAT ROTRONICS SF D65 P 1 P 2 P 3 All Dashed Wiring by others 1 2 3 4 5 6 ...

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Page 41: ...46 12 1 SEALS SEAL KIT UPPER LOWER 43552 02 1 MOTORS DRIVE MOTOR S N J92 92483 01 220V 1 BELTS DRIVE BELT 91626 03 1 FILTERS PROCESS IN 95007 29 1 REACT IN 95007 40 1 ROLLERS DESICCANT SUPPORT 15985 2 HEATERS 460V 3PH 91761 09 1 208 230V 3PH 91761 01 1 208V 230V 1PH 91761 02 1 03 CHANGED 30146 11 TO 30146 12 PER ECR 12 00129MA TJM 05 15 13 TJM 02 DRIVE MOTOR WAS 92054 02 HEATERS WERE 91719 SERIES ...

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