MR050A SERIES DEHYDRATOR USER MANUAL
Contents
1. the fact that service is being performed It is also necessary to disconnect the dehydrator dry air output from the waveguide system during the overhaul Remove the chassis top and front panels for overhaul 1 Unplug the unit from the power supply 2 Follow the instructions included in the compressor replacement kit When the replacement is complete reinstall 3 5 Service Restoration RECOMMENDATION If the dehydrator overhaul process has taken more than a few hours it is recommended that the unit be run for one hour into the room to purge the membrane dryer and tank of any acquired moisture before reconnecting to the transmission line system 10 MR050A SERIES DEHYDRATOR USER MANUAL Troubleshooting Section 4 If you experience difficulty with your dehydrator use the troubleshooting procedures described below Caution Electrical troubleshooting requires access to potentially dangerous voltages and should only be performed by a licensed electrician If the display light fails to light make sure the unit is plugged in and power outlet is operating If you still have no light unplug the unit remove the unit cover and check for loose connections Refer to the iringdiagram for proper connections Check to assure that the fuse is OK Check to assure that proper AC voltage is being supplied to the input Plug the unit output with finger and observe pressure gauge The pressure gauge line should read approximat2. 050A SERIES DEHYDRATOR USER MANUAL 2oneuneug 013409 Ajquiasse qns PJOJIUEIN S soH A u8 5uo1 S 9SOH t L 9SOH r L 43 soH vil Us SLELE 1 bb 6 t l GLELE m Ajquiasse qns Josueg AJIPILUNH 9SOH 9SOH b L GLELE 19151189 luo SLOLE 1189091592 16 MR050A SERIES DEHYDRATOR USER MANUAL Replacement Parts Section 5 Check website for latest updates to the manaul and parts lists The following is a list of the replacement kits for the MROSGA Series dehydrators Desiccant Kit MR050A KIT DSCNT C lt Compressor Kit MR050A KIT CPRSR Controller Kit MR050A KIT CNTLR 17 Customer Service Section 6 6 0 6 1 Introduction CommScope provides in warranty and out of warranty repairs as well as dehydrator and compressor overhauls from several Repair Centers Coordination of these services is provided through the nearest Sales Office or Customer Service Center The Center is also prepared to help you with the following Technical Assistance Troubleshooting Repairs Loaner Units Spare Parts Installation Materials System Accessories In Case of Trouble The first step you should take if trouble develops using a dehydrator is to read the operators manual and follow the trouble isolating procedures given in it If
3. 1 4 MRO050A Series dehydrators provide dry air for pressurizing small up to 280 liters or 10 cubic feet in volume antenna and transmission line systems The dehydrators produce 40 C 40 F dew point dry air at a nominal rate of 1 4 liters 0 05 cubic feet per minute up to a total of 8495 liters 300 cubic feet on a single desiccant canister Each dehydrator consists of an electrically driven air compressor a desiccant canister an automatic transmission line pressure sensing system and alarm outputs housed in a rigid metal chassis It is designed to mount directly to the rack directly on a wall or as a free standing unit The front panel features a control interface with display for alarms and pressure For easy serviceability power connections alarm output connections and the desiccant canister are easily accessible from the front of the unit The MR050A maintains transmission line pressures between 2 0 and 3 4 kPa 0 3 and 0 5 psig It is intended for use with high performance microwave antennas and earth station antennas Operation MR050A series dehydrators include a compressor color indicating desiccant high and low pressure sensors and a low pressure alarm sensor When system pressure falls to a preset low limit the low pressure sensor activates the compressor Air is channeled through a desiccant canister where moisture is adsorbed The air exits the drying canister at 40 C 40 F dewpoint It is t
4. COMMSCOPE MROSOA SERIES DEHYDRATOR USER MANUAL Bulletin AE01B A0532 001 Rev B 2008 2011CommScope Inc All rights reserved 04 11 MR050A SERIES DEHYDRATOR USER MANUAL SECTION 1 General Information Introduction Description Operation Alarms Option Multiple Alarm Option Specifications SECTION 2 Installation Unpacking and Inspection Controls and Displays Power Connections AC Power DC Power Connecting Low Pressure Alarm Output Connecting Dehydrator to the Transmission Line Purging the Transmission Line YY 0 0 O gt SECTION 3 Maintenance 9 Maintenance 9 Preventive Maintenance 9 Desiccant Replacement 9 Annual Maintenance 9 Parts Replacement 9 0 Service Restoration 1 SECTION 4 Troubleshooting 11 Problem Solution Table 11 Schematic Diagram MR050A 31015 13 Alarm Schematic Diagram with All Option MR050A 31315 15 Pneumatic Diagram 16 SECTION 5 Replacement Parts 17 SECTION 6 Customer Service 17 Introduction 17 In Case of Trouble 17 Initial Steps by CommScope 18 Return Goods Instructions 18 Repair Center Process 18 Loaner Units 18 Warranty 19 1 1 MR050A SERIES DEHYDRATOR USER MANUAL Introduction This manual contains the information you need to install operate and maintain your MR050A Series DryLine dehydrator Please take the time to read this manual before attempting to operate or service the unit 1 2 1 3 Description
5. JP2 High Humidity Cut Out Pressure Cut In Pressure Output capacity Output Dew Point Operating Temperature Range Low Pressure Alarm Electrical Input Power Consumption J1 FUSE Alarm to 5 amp 250V Control AZ943 1CH ED TT 2943 10 H 5D In Tero 1103 CHINA HUM Bypass 35 kPa 0 5 PSIG 2 kPa 0 3 PSIG 85 SLPH total approx 1 4 SLPM 3 0 SCFH 0 05 SCFM 36 C 33 F or better 1 to 40 C 34 to 104 F 1 4 kPa 0 2 PSIG 24 48 Vdc 115 230 Vac 50 60 Hz with ac to dc adapter 11 watts J4 Humidity Sensor Figure 2 Output Connectors Dimensions Weight Optional Alarms High Humidity Alarm Power Fail Alarm Excess Run High Press Alarm a P Main Power 3 8 polytube compression 450mm W x 132mm H x 216mm D 17 7 W x 5 2 Hx 8 5 D 7 26 kg 16 Ibs 7 5 RH factory set point Loss of input power 30 minutes factory set 5 5 kPa 0 8 PSIG MR050A SERIES DEHYDRATOR USER MANUAL Installation Section 2 2 1 Unpacking and Inspection Open Carton Remove the top piece of closed cell foam packaging Carefully remove the installation accessories manual and dehydrator Check the dehydrator for shipping damage such as dents or loose parts Mode 2 Displays pressure and total run hours 2 2 Controls and Displays flashes current condition Familiarize yourself with the controls and disp
6. block on the front of the unit Optional alarms if purchased will also be located on this terminal see section 1 4 for terminal numbers Connecting Dehydrator to the Transmission Line Insert one end of the 3 8 polytube feed line tubing into the compression fitting on one of the dehydrator output ports Tighten securely with a 9 16 wrench Be careful not to over tighten Connect the other end of the polytube to the transmission line Multi Alarm Summary Alarm 2 7 Note If the transmission lines have not been purged continue with section 2 7 Otherwise proceed to section 3 Purging the Transmission Line Air in the transmission line system must be replaced with dry air to ensure satisfactory operation of the transmitted signal 1 Determine the total system volume 2 Divide the system volume by the flow rate of the dehydrator 3 0 SCFH to determine the number of hours needed for the purge cycle 3 Open the far end of the transmission line 4 Operate the dehydrator for three purge cycles If itis not possible to open the far end of the transmission line follow these steps 1 Connect the dehydrator to the transmission line and pressurize the System The system pressure should reach 0 5 PSIG 2 Wait 15 minutes while the air absorbs moisture in the system then disconnect the dehydrator from the transmission line and allow the air to vent 3 Repeat steps 1 and 2 twelve times to purge
7. ce If your unit is out of warranty it will be inspected and repaired for the quoted fee Loaner Units The CommScope dehydrator Repair Centers stock a limited number of loaner dehydrator units of both current and discontinued products These units while not new are still in excellent working order Loaners are available on a first come first served basis They are issued in conjunction with the original RGN and are invoiced at a nominal price You will need to request a second RGN to return the loaner unit A credit memo is issued by the Repair Center when a loaner is returned MR050A SERIES DEHYDRATOR USER MANUAL 19 MR050A SERIES DEHYDRATOR USER MANUAL 20
8. ector to ensure that the AC power cord is securely terminated Check the screw in alarm terminals to ensure that all wire connections are tight A loose or damaged connection may result in erratic operation and unnecessary downtime Refer to the troubleshooting section if an electrical problem is encountered Check the ground wire Check that an electrical safety ground is installed on the stud on the rear of the dehydrator This connection point is adjacent to the power input connector It is intended to be customer installed in the field Check the hour meter on the front panel to determine the duty cycle of the dehydrator If the dehydrator has been running for more than 10 of its installed time check the systems for leaks Parts Replacement When the MRO50A dehydrator unit is in need of service the main components are simply replaced The compressor desiccant canister and control module are all meant to be replaceable parts The parts can be purchased from CommScope for field replacement or the unit can be sent to the repair center for component replacement MR050A SERIES DEHYDRATOR USER MANUAL f s Unit Shutdown and Removal In order to perform an overhaul on the MR050A the unit must be turned off and removed from service As this is being done the low pressure alarm may activate through a reporting alarm system Personnel monitoring such an alarm should be notified in advance so that they are aware of
9. ely 0 5 psi and the alarm should clear If alarm does not clear remove cover and verify tubing and wiring connections are secure Dehydrator display does not light unit does not run If the pressure does not remain constant after plugging the output apply leak detector to isolate the leak in the dehydrator exercise care when applying solution not to wet Low pressure alarm activated 1 wiring or electronics With dehydrator isolated from transmission line observe pressure in transmission line If pressure drops use a leakdetector solution to locate leaks in the transmission line Repair leaks if possible If the problem persists contact CommScope Customer Service Check the display on the controller Toggle the ON OFF Compressor does not turn OFF switch left of the display power polarity and voltage per wiring 11 MR050A SERIES DEHYDRATOR USER MANUAL MR050A SERIES DEHYDRATOR USER MANUAL Wav TV AYVINANS SLOLE VOSOMIN 3OSS33dINOS 13 MR050A SERIES DEHYDRATOR USER MANUAL SLELE VOSOMIN YOSN3S ALIGINANH HOJ a9nvuo Navy ssaud 1319 WOO ssaud MOT J 3LIHM Wav ss39X3 Ji ana woo Nny ALIGINNH N3339 NOD ALIGINNH TIVA MIMO DR iva wamoa MR050A SERIES DEHYDRATOR USER MANUAL a aom A 08 dwe asna HOSS3HdWoo 15 MR
10. hen channeled directly to an internal 4 port manifold When system pressure reaches a preset high limit the high pressure sensor shuts off the compressor A check valve prevents system dry air from retreating back through the compressor If system pressure falls significantly below the low pressure trigger point the low pressure alarm sensor will activate an alarm contact This alarm is an indication of a significant system leak or a dehydrator failure Alarms The MROSOA offers Low Pressure and Power Fail alarms as a standard feature Alarm conditions are indicated on the display Alarms are output as a common summary alarm with a form C dry contact The alarm is set for continuity on alarm MR050A SERIES DEHYDRATOR USER MANUAL 1 4 1 Multiple Alarm Option Alarm Definitions This optional assembly is designed to Power Fail Activates open when power is provide the additional High Humidity alarm to removed from the dehydrator This CommScope Dehydrators All alarms are Form includes turning the power off at the C dry contacts and are factory set for continuity switch at alarm mains power fail alarm opens at alarm High Humidity Activates when system or dehydrator output humidity rise This optional assembly will also indicate discrete above 7 5 relative humidity At alarms on the display and provide individual initial installation this alarm will contacts and connections for discrete alarms continue to alarm until
11. lays prior to installing or testing the dehydrator j Mode Switch Switch ON OFF Switch Toggles unit condition ON and OFF Mode Switch Toggles between display modes Mode3 Displays last ON and last OFF times Mode 1 Displays pressure and total run hours MR050A SERIES DEHYDRATOR USER MANUAL 2 3 Installing the Dehydrator CAUTION 2 3 1 19 Rack Mounting or set on shelf Check the antenna and transmission line 2 4 Power Connections system pressure rating before connecting the dehydrator to the system Confirm your dehydrator electrical input matches the available power White stripe wire 24 Vdc 48 Vdc MRO50A 31015 MRO50A 31315 2 4 4 AC Power AC units can be connected into a standard 15 Amp power receptacle of the proper voltage via the power supply Make sure the power circuit is properly grounded Two power cords are supplied one 115 VAC American and one 230 VAC International Blue Tube Low Pressure FUSE lt 215 B4 5 amp 250V E 1 1 PIN 1 DC PIN 2 24 V JUMPER TB3 PIN 3 DC MOTOR B PIN 4 DC Summary Alarm PIN 5 24 V JUMPER PIN 6 DC MOTOR MR050A SERIES DEHYDRATOR USER MANUAL Test the Dehydrator 2 5 2 6 Turn the dehydrator ON and check the output port on the rear of the unit to make sure air is flowing Connecting the Alarm Outputs To connect the alarms locate the alarm output terminal
12. the steps in the manual do not identify and remedy the problem then contact an CommScope Customer Service Center for 24 hour telephone assistance Record the Model Number e g MRO50A and Serial Number from the product label as you will be asked for these when you call Two main locations are currently available to help in North America 1 800 255 1479 in Europe 44 1592 782612 any Location to USA 708 349 3300 If you find it easier to describe your troubles by Fax then the following numbers are also available in North America 1 800 349 5444 Fax only in Europe 44 1592 782380 Fax only any Location to USA 708 349 5410 Fax only CommScope 3 Westbrook Corporate Center Suite 900 Westchester IL 60154 USA 6 2 6 3 MR050A SERIES DEHYDRATOR USER MANUAL Initial Steps by CommScope When your call or fax communication is 6 4 received the CommScope staff will work with you to pinpoint the possible cause of trouble If the pressurization equipment is suspect they will ask for your unit Model Number and Serial Number check the warranty status of the unit advise the availability of a loaner unit provide of the cost for inspection and repairs if the unit is out of warranty fax a Return Goods Authorization Sheet to you Return Goods Instructions After you have contacted CommScope and received a Return Goods Authorization Number 6 5 RGN you will need to take the follo
13. the system MR050A SERIES DEHYDRATOR USER MANUAL Maintenance Section 3 3 0 Maintenance The MR050A Dehydrator requires relatively little maintenance to ensure satisfactory operation over long periods of time This section outlines the recommended annual preventive maintenance for the unit and the suggested overhaul for every 6000 hours of compressor operation 3 1 Preventive Maintenance The annual maintenance of a MR050A consists of a preventative maintenance inspection of the dehydrator These tasks can easily be performed in the field with the unit connected to the transmission line system In addition to the annual inspection a complete overhaul is recommended every 6000 hours or sooner if local conditions warrant 3 2 Desiccant Replacement As the desiccant becomes saturated over time it will change from blue to pink When the desiccant is exhausted there will be a degradation of performance In order to replace the desiccant simply turn the unit off disconnect the desiccant canister from the pneumatic lines and replace the entire canister 3 3 Annual Inspection Inspection includes checking for loose or 3 4 damaged hoses fittings and electrical connections Remove the desiccant canister and verify that there are no leaks in the pneumatic lines Warning Electrical Hazard Unplug power cord before servicing unit Check the electrical connections Check the screw at the power input conn
14. the system has been properly purged The external alarm monitoring system supplied by others is connected to the terminal strip Excess Run Factory set run time is set in located on the front of the cabinet A small slotted screwdriver is necessary to make the connections Low Pressure accordance with the normal run time for the dehydrator application Selectable times are 30 minutes with the 10 minute as default on the MR050A If system pressure falls below the low pressure trigger point the low pressure alarm sensor will activate an alarm contact This alarm is an indication of a significant system leak or a dehydrator failure Changing Alarm Outputs Alarm Factory setting Where To Reset Summary Normally TB4 on Control Alarm Open N O Board Multiple Alarms Multi Alarm Summary Alarm Alarm Factory setting Where To Reset Figure 1 Term Function Wire Color Low Pressure Normally Jumper JP4 on Open N O Alarm PCB 1 Power Fail Com Black A B 2 Power Fail Alarm Red Mains Normally Jumper JP3 on Power Fail Closed N C Alarm PCB 3 Humidity Com Green B C 4 Humidity Alarm Brown Excess Run Normally Jumper JP1 on Open N O Alarm PCB 5 Excess Run Com Blue A B 6 Excess Run Alarm White High Humidity Normally Jumper JP2 on Open N O Alarm PCB 7 Low Press Com Gray A B 8 Low Press Alarm Orange MR050A SERIES DEHYDRATOR USER MANUAL JP1 Excess Run JP3 Power Fail J3 Alarm Connection JP4 Low Pressure
15. wing steps to send the faulty unit to a Repair Center make a copy of the Return Goods Authorization Sheet that was faxed to you write a brief description of the trouble you are encountering and attach this to the copy of the sheet pack the unit with at least 4 inches of protective packaging on all sides enclose the authorization sheet and trouble description within the box enclose a purchase order or other method of payment for non warranty repairs mark the outside of the box with the RGN return the box to the Repair Center address listed on the authorization sheet If you have saved the original packaging that came with the unit use it to return the dehydrator for repair If a loaner unit of the same type was supplied by CommScope use the loaner unit box to return the original 18 dehydrator Repair Center Process The CommScope Dehydrator Repair Center will receive your unit and inspect it for any transport damage The unit will then be analyzed for troubles using the description you have supplied and the specialized experience the Repair Center staff have with dehydrators If the unit is in warranty repairs are made at no charge and the unit will be returned to you by the same mode of transport as it was received If the unit is in warranty but no problems are found the unit will be thoroughly tested before being returned to you Anominal inspection fee will be charged for this servi
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