Enwa MT 5500 Operational Manual
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Enwa MT 5500 Operational Manual

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Operational
Manual
Manual for the unit:
MT 1500
MT 1800
MT 2300
MT 3200
MT 4500
MT 5500
MT 6000
ENWA AB
Backa Bergögata 13, SE-422 46 Hisings Backa
Tel. +46 (0)31-742 92 50, Fax. +46 (0)31-742 92
info@enwa.se - www.enwa.se

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Summary of Contents for Enwa MT 5500

  • Page 1 Operational Manual Manual for the unit: MT 1500 MT 1800 MT 2300 MT 3200 MT 4500 MT 5500 MT 6000 ENWA AB Backa Bergögata 13, SE-422 46 Hisings Backa Tel. +46 (0)31-742 92 50, Fax. +46 (0)31-742 92 info@enwa.se - www.enwa.se...

  • Page 2: Table Of Contents

    ENGLISH Version 041027 CONTENTS 1. INTRODUCTION ............2 2. DESCRIPTION OF PROCESS........3 3. SPECIFICATION ............5 4. INSTALLATION FOR SPLIT MOUNTED UNIT ..... 6 5. INSTALLATION FOR RACK MOUNTED UNIT ..... 9 6. INITIAL START-UP PROCEDURE......11 7. NORMAL START-UP ..........13 8.

  • Page 3: Introduction

    40 NTU suspended matter. If the unit is intended to be operated on feed water with a suspended matter higher than 0,5 NTU, or if oil, grease etc. is present an additional pre-treatment section is required. For information, please contact ENWA AB. 2/28...

  • Page 4: Description Of Process

    This filter will not be included the delivery from ENWA AB. Recommended mesh size is 0,5- 2,5 mm. The mesh filter supplied has to be manufactured from a non-corrosive material.
  • Page 5 ENGLISH Version 041027 conductivity is below the limit, the product will go to tank and if the conductivity is above the limit, the product will go to waste. When the conductivity meter is in ”OFF” position the product water will go to waste. The product flow will be measured by a flow-meter (FI-2060).

  • Page 6: Specification

    ENGLISH Version 041027 3. SPECIFICATION FEED WATER: Clean sea water, approx. 10-15 litres/min. VOLTAGE PHASE FREQUENCY POWER FP POWER HP 115 VAC 1-phase 60 Hz 0.55 kW 1.1 kW 230 VAC 1-phase 50 Hz 0.55 kW 1.5 kW 400 VAC 3-phase 50 Hz 0.55 kW...

  • Page 7: Installation For Split Mounted Unit

    ENGLISH Version 041027 4. INSTALLATION FOR SPLIT MOUNTED UNIT The pump module and R.O-module may be mounted next to each other, or separately as desired. FEEDWATER PUMP (FP-1010, Option) Mount the pump below sea level. A washable mesh filter should be connected in the suction side of the pump.
  • Page 8 ENGLISH Version 041027 R.O-MODULE (RO-2030 eventually -31, -32, -33, -34) The R.O-module can be bolted or screwed to a horizontal or vertical surface. The location chosen should: At no time have a surrounding temperature exceeding 45° C. Have adequate space around for operation and maintenance such as adjustment of working pressure and safety relief valve.
  • Page 9 ENGLISH Version 041027 CONDUCTIVITY CELL (1u400) AND 3-WAY SOLENOID VALVE (ROV-2060) Shall be mounted within reach for service and manual activation on a rigid surface with the 3-way solenoid valve above the cell. ELECTRIC CONTROL UNIT All electrical control units shall be mounted on a rigid surface. Allow space for operation. ELECTRICAL CONNECTIONS To connect all electrical items, see process and connection diagram as well as electrical diagram.

  • Page 10: Installation For Rack Mounted Unit

    ENGLISH Version 041027 5. INSTALLATION FOR RACK MOUNTED UNIT DESALINATION UNIT The desalination unit must be bolted horizontally where the location chosen should: At no time have a surrounding temperature exceeding 45° C. Have adequate space around for operation and maintenance. Not be mounted where unforeseen leakage can cause damage.
  • Page 11 ENGLISH Version 041027 ELECTRICAL CONNECTIONS To connect all electrical items, see process and connection diagram as well as electrical diagram. NOTE! Mount an operate/safety switch for the electrical connections to the unit. 10/28...

  • Page 12: Initial Start-Up Procedure

    ENGLISH Version 041027 6. INITIAL START-UP PROCEDURE Carry out the following steps the first time the fresh water unit is to be operated, or after a prolonged shut down. 1. Check the oil level on the high-pressure pump (HPP-2010). Check that the cartridge filters (F-2010, -2020) are properly installed. 2.
  • Page 13 ENGLISH Version 041027 7. Start the conductivity meter (1u400) by turning the switch marked “SALINITY” to position “ON”. When the conductivity is below 1200 µS/cm the product will automatically go to tank (ROV-2060 will be activated. 8. For shut down, see ”NORMAL STOP”. NOTE! For initial start-up after a prolonged shutdown, or after any chemical treatment, the unit must be started according to the instructions in ”INITIAL START-UP PROCEDURE”.

  • Page 14: Normal Start-Up

    ENGLISH Version 041027 7. NORMAL START-UP After the unit has been initially started and flushed, the subsequent steps are to be made: • Check that the flush water valve (HV-2020) is open. • Open the feedwater valve (HV-2010). • Start the feedwater pump (FP-1010) by the switch marked ”SYSTEM”. •...

  • Page 15: Normal Stop

    ENGLISH Version 041027 8. NORMAL STOP To shut down the unit, proceed as follows: • Turn the switch marked ”HP PUMP” to ”OFF” position • Turn the switch marked ”SYSTEM” to ”OFF” position. • The flush water valve (ROV-2020) opens automatically for appr. 10-15 min. (The flush water valve closes automatically).

  • Page 16: Long Term Stop

    ENGLISH Version 041027 9. LONG TERM STOP The R.O-module should be preserved with MT-5 solution when it is intended to shut down the desalination unit for a long period, or when it not can be flushed regularly every week. We have cleaning equipment as extra equipment, alternative you can use a portable cleaning tank and plastic hoses.
  • Page 17 ENGLISH Version 041027 Do not start the feedwater pump. 16/28...
  • Page 18 ENGLISH Version 041027 Start the high-pressure pump (HPP-2010) in position “MAN”. NOTE! The pump will throb until the flow-and-pressure in the system becomes stabilised. Do not flush the system after preservation. (The preservation solution will be flushed away in that case). Reconnect the feedwater connection (CN-2010).

  • Page 19: General Running And Operation Condition18

    Type of unit b. Feed water temperature c. Salt content in the feed water Low temperature and/or high salt content in the feedwater will decrease the product water flow as below. MT 1500 MT-2300 MT 1800 MT 3200 MT4500...

  • Page 20: R.o-Module Fouling

    ENGLISH Version 041027 11. R.O-MODULE FOULING Is a complex phenomenon which involves trapping material in the fibre bundle or on the surface of the membrane inside the R.O. module. When a R.O module fouls, the salt concentration of the product water usually increases. The conductivity meter shows higher conductivity.
  • Page 21 To avoid biological fouling do not operate the unit in water which is strongly contaminated with bacteria. Such as harbour water etc. If the unit is intended to be operated in such water, please contact ENWA AB, so that a suitable pre-treatment section can be designed. Bacterial fouling is identified by conductivity increasing after an extended shut down without MT-5 protection.
  • Page 22 ENGLISH Version 041027 CHEMICAL CLEANING PROCEDURES Reverse Osmosis, like most other water treatment equipment, occasionally needs cleaning. As a separate item a cleaning tank is required. The tank can be a plastic bin containing a volume of 40 litres. Some plastic hoses are also required. CHEMICAL TREATMENT Shut down the unit as described under ”NORMAL STOP”.
  • Page 23 1 hour, by turning on the product water 3-way valve to waste. If the cleaning procedure has no effect, disconnect the R.O-module and send it to ENWA AB, for cleaning. 22/28...

  • Page 24: Chemical Cleaning Agents

    ENGLISH Version 041027 12. CHEMICAL CLEANING AGENTS When using any of the chemicals mentioned, follow accepted safety practice. When preparing chemical solutions for cleaning, be certain that all chemicals are dissolved and well mixed before introducing them into the R.O. unit. During re-circulation, temperatures must not exceed 40°...
  • Page 25 ENGLISH Version 041027 MT-10 + MT-5 STERILISATION Sterilisation has to be done when the content of bacteria is too high, which you recognise on a bad taste of the water. Pretreat the unit with MT-10 as described in ”MT-10 CHEMICAL CLEANING”. Flush for at least 15 minutes. After that you are going to treat the unit as described in ”Preparing MT-5 Sterilisation”.
  • Page 26 ENGLISH Version 041027 MT-20 CHEMICAL CLEANING To be used when scaling or metal-oxides have caused fouling. Preparing MT-20 Add one plastic bottle of MT-20 into the 40 litres cleaning tank containing product water. Mix well. Re-circulation time MT-20 1 hour. Best temperature for treatment is 35°...

  • Page 27: Trouble Shooting

    ENGLISH Version 041027 13. TROUBLE SHOOTING LOW FEEDWATER PRESSURE Change the feedwater filter. Clean the mesh filter. =============================================================== OPERATION PRESSURE INDICATES ZERO EVEN WHEN THE PRESSURE REGULATING VALVE (PCV-2050) IS ALMOST CLOSED. Check high pressure pump belt tensioning (when V-belting). Check the high pressure pump valves, repair if required.

  • Page 28: Maintenance

    NOTE ! Use only feed water filter and flush water filter recommended by ENWA AB. Erroneous choice of filter can damage the unit. HIGH PRESSURE PUMP LUBRICATION Change the oil in the pump after the first 100 hours of operation, and then after every 1000 hours of operation.

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