MR050A SERIES DEHYDRATOR USER MANUAL
Contents
1. 8 PSIG MRO50A SERIES DEHYDRATOR USER MANUAL Installation Section 2 2 1 2 2 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 Controls and Displays Familiarize yourself with the controls and displays prior to installing or testing the dehydrator A i Mode re ON OFF Switch Switch MODE ON OFF Switch Toggles unit condition ON and OFF Mode Switch Toggles between display modes Mode 1 Displays pressure and total run hours Mode2 Displays pressure and total run hours flashes current condition Mode 3 Displays last ON and last OFF times MRO50A 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 24 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 MR050A 31015 MRO50A 31315 2 4 1 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 Inte2. 50A KIT CNTLR Customer Service Section 6 Introduction Andrew 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 the steps in the manual do not identify and remedy the problem then contact an Andrew 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 Andrew Corporation 0500 W 153rd Street Orland Park IL 60462 USA 6 2 6 3 MR050A SERIES DEHYDRATOR USER MANUAL Initia
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4. MROSOA SERIES DEHYDRATOR USER MANUAL Bulletin AEO1B A0532 001 Rev A 2008 CommScope Inc All rights reserved 06 08 MR050A SERIES DEHYDRATOR USER MANUAL SECTION 1 General Information 3 Introduction 3 Description 3 Operation 3 Alarms Option 3 Multiple Alarm Option 4 Specifications 5 SECTION 2 Installation 6 Unpacking and Inspection 6 Controls and Displays 6 Power Connections 7 AC Power T DC Power T Connecting Low Pressure Alarm Output 8 Connecting Dehydrator to the Transmission Line 8 Purging the Transmission Line 9 SECTION 3 Maintenance 9 Maintenance 9 Preventive Maintenance 9 Desiccant Replacement 9 Annual Maintenance 9 Parts Replacement 9 Service Restoration 10 SECTION 4 Troubleshooting 11 Problem Solution Table 11 Schematic Diagram MRO50A 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 Andrew 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 MROSOA Series DryLine dehydrator Please take the time to read this manual before attempting to operate or service the unit 1 2 1 3 Description 1 4 MRO50A Series dehydrators provide dry air for pressurizing small up t
5. MT200 series number type DryLine amp Dehydrator is transferred rightfully and with good title that it is free from any lawful security interest or other lien or encumbrance unknown to Buyer and that for a period of thirty six 36 months from the date of shipment or 3000 hours of actual run time whichever shall occur first such equipment will be free from defects in material and workmanship which arise under proper and normal use and service Buyer s exclusive remedy hereunder is limited to Seller s correction either at its plant or at such other place as may be agreed upon between Seller and Buyer of any such defects by repair or replacement with either a new unit or a factory reconditioned unit at no cost to Buyer provided that the cost of any transportation in connection with the return of the equipment for the purpose of repair or replacement shall be borne by Buyer The provisions of this warranty shall be applicable with respect to any equipment which Seller repairs or replaces pursuant to it Expressly excluded from the terms of this warranty are defects caused by i faulty installation ii lack of proper inspection or maintenance ii and usage not in accordance with published ratings specifications or instructions The provisions of this warranty shall be applicable with respect to any equipment Seller repairs or replaces pursuant to it SELLER MAKES NO WARRANTY EXPRESS OR IMPLIED OTHER THAN AS SPECIFICALLY STATED ABOVE EXPRES
6. SLY EXCLUDED ARE ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR PURPOSE THE FOREGOING SHALL CONSTITUTE ALL OF SELLER S LIABILITY EXCEPT AS TO PATENT INFRINGEMENT WITH RESPECT TO THE EQUIPMENT IN NO EVENT SHALL SELLER BE LIABLE FOR SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES INSTALLATION COSTS LOST REVENUE OR PROFITS OR ANY OTHER COSTS OF ANY NATURE AS A RESULT OF THE USE OF THE EQUIPMENT MANUFACTURED BY SELLER WHETHER USED IN ACCORDANCE WITH INSTRUCTIONS OR NOT UNDER NO CIRCUMSTANCES SHALL SELLER S LIABILITY TO BUYER EXCEED THE ACTUAL SALES PRICE OF THE EQUIPMENT PROVIDED HEREUNDER No representative is authorized to assume for Seller any other liability in connection with the equipment Rev 2 0706 MR050A SERIES DEHYDRATOR USER MANUAL 20
7. e 3 Open the far end of the transmission line 4 Operate the dehydrator for three purge cycles If it is 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 d Repeat steps 1 and 2 twelve times to purge the system MR050A SERIES DEHYDRATOR USER MANUAL Maintenance Section 3 3 0 3 1 3 2 3 3 Maintenance The MROSOA 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 Preventive Maintenance The annual maintenance of a MROSOA 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 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 per
8. e 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 1 4 1 Multiple Alarm Option MRO50A SERIES DEHYDRATOR USER MANUAL This optional assembly is designed to provide the additional High Humidity alarm to Andrew Dehydrators All alarms are Form C dry contacts and are factory set for continuity at alarm mains power fail alarm opens at alarm This optional assembly will also indicate discrete alarms on the display and provide individual contacts and connections for discrete alarms The external alarm monitoring system supplied by others is connected to the terminal strip located on the front of the cabinet A small slotted screwdriver is necessary to make the connections Multi Alarm Term 1 2 Figure 1 Function Power Fail Com Power Fail Alarm Humidity Com Humidity Alarm Excess Run Com Excess Run Alarm Low Press Com Low Press Ala
9. formance In order to replace the desiccant simply turn the unit off disconnect the desiccant canister from the pneumatic lines and replace the entire canister 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 connector 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 ofits installed time check the systems for leaks Parts Replacement When the MROSOA dehydrator unit is in need of service the main components are simply replaced The compressor desiccant canister and control module are a
10. l Steps by Andrew 6 4 When your call or fax communication is received the Andrew staff will work with you to pinpoint the possible cause of trouble If the pressurization equipment is suspect they will e ask for your unit Model Number and Serial Number e check the warranty status of the unit e advise the availability of a loaner unit provide of the cost for inspection and repairs if the unit is out of warranty e Return Goods Authorization Sheet to you Return Goods Instructions After you have contacted Andrew and received a 6 5 Return Goods Authorization Number RGN you will need to take the following steps to send the faulty unit to a Repair Center e make a copy of the Return Goods Authorization Sheet that was faxed to you e write a brief description of the trouble you are encountering and attach this to the copy of the sheet e pack the unit with at least 4 inches of protective packaging on all sides e enclose the authorization sheet and trouble description within the box e enclose a purchase order or other method of payment for non warranty repairs e mark the outside of the box with the RGN e 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 Andrew use the loaner unit box to return the original dehydrat
11. ll meant to be replaceable parts The parts can be purchased from Andrew Corporation for field replacement or the unit can be sent to the repair center for component replacement MRO50A SERIES DEHYDRATOR USER MANUAL Unit Shutdown and Removal In order to perform an overhaul on the MRO50A 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 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 MRO50A 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 a
12. nd 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 he input Plug the unit output with finger and observe pressure gauge The pressure gauge line should read approximately 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 he output apply leak detector to isolate the leak in the Low pressure alarm activated dehydrator exercise care when applying solution not to wet iring or electronics ith 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 Andrew Customer Service Check the display on the controller Toggle the ON OFF Compressor does not turn OFF switch left of the display polarity and voltage per wiring 11 MRO50A SERIES DEHYDRATOR USER MANUAL MR050A SERIES DEHYDRATOR USER MANUAL SLO
13. o 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 MROSOA 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 MROSOA 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 then channeled directly to an internal 4 port manifold When system pressur
14. or Repair Center Process The Andrew 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 A nominal inspection fee will be charged for this service If your unit is out of warranty it will be inspected and repaired for the quoted fee Loaner Units The Andrew 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 pr t ANDREW Andrew Corporation Small and Medium Capacity Dehydrator and Line Monitor System Three Year Warranty Seller warrants that any Andrew MT050 MT XT300 MT XT500 MROSO PMT200 and ODP
15. rm Summary Alarm Wire Color Black Red Green Brown Blue White Gray Orange Alarm Definitions Power Fail High Humidity Excess Run Low Pressure Activates open when power is removed from the dehydrator This includes turning the power off at the switch Activates when system or dehydrator output humidity rise above 7 5 relative humidity At initial installation this alarm will continue to alarm until the system has been properly purged Factory set run time is set in accordance with the normal run time for the dehydrator application Selectable times are 30 minutes with the 10 minute as default on the MROSOA 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 Summary Alarm Alarm Low Pressure Mains Power Fail Excess Run High Humidity Factory settin Normally Open N O Multiple Alarms Factory settin Normally Open N O A B Normally Closed N C B C Normally Open N O A B Normally Open N O A B Where To Reset TB4 on Control Board Where To Reset Jumper JP4 on Alarm PCB Jumper JP3 on Alarm PCB Jumper JP1 on Alarm PCB Jumper JP2 on Alarm PCB MRO50A SERIES DEHYDRATOR USER MANUAL J1 FUSE Alarm to 5 amp 250V Control JP1 E
16. rnational Blue Tube Low Pressure FUSE B4 5 amp 250V Alarm Board Gees Ap E poo EM DEL PIN 1 DC PIN 2 24 V JUMPER TB3 PIN 3 DC MOTOR B PIN 4 DC Summary Alarm PIN 5 24 V JUMPER 7 PIN 6 DC MOTOR MR050A SERIES DEHYDRATOR USER MANUAL Test the Dehydrator Turn the dehydrator ON and check the output port on the rear of the unit to make sure air is flowing 2 5 Connecting the Alarm Outputs To connect the alarms locate the alarm output terminal 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 2 6 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 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 cycl
17. xcess Run J P3 Power Fail J3 Alarm Connection J PA Low Pressure JP2 High Humidity HUM Bypass Cut Out Pressure Cut In Pressure Output capacity Output Dew Point Operating Temperature Range Low Pressure Alarm Electrical Input Power Consumption ETTLER AZ943 1CH 5D 10A 277VAC eus 1103 CHINA n FETTLEA A2943 1CH 50 10A 277VAC coma 1109 CHINA a LEA AZB43 1CH 5D 10 vi 1163 CHINA 6 5 14 11 E AXICOM On TJ DE Ala T VFO ASOT AO E J5 RIDAENA MeL Adanka IONS NUOVA De y arator J 35 kPa 0 5 PSIG 2 kPa 0 3 PSIG 85 SLPH total approx E gt TED TT 7 TDI TJ FT n n LA CS PAK Ph reece PPP e A E M a MIK XK J4 Humidity Sensor Figure 2 Output Connectors Dimensions 1 4 SLPM 3 0 SCFH 0 05 SCFM 40 C 40 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 Weight Optional Alarms High Humidity Alarm Power Fail Alarm Excess Run High Press Alarm n la PRESSURE ALARM BOARD J2 Main Power 3 8 polytube compression 450mm W x 132mm H x 216mm D 17 7 Wx5 2 Hx 8 5 D 7 26 kg 16 lbs 7 5 RH factory set point Loss of input power 30 minutes factory set 5 5 kPa 0
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