Enwa MT 1500 Operational Manual Download Page 9 | Manualshive

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ENGLISH

Version 041027

8/28

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.

NOTE!

Mount an operate/safety switch for the electrical connections to the unit.

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Summary of Contents for MT 1500

Page 1: ...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 Operational Manual Manual for the unit MT 1500 MT 1800 MT 2300 MT 3200 MT 4500 MT 5500 MT 6000 ...

Page 2: ...TALLATION FOR SPLIT MOUNTED UNIT 6 5 INSTALLATION FOR RACK MOUNTED UNIT 9 6 INITIAL START UP PROCEDURE 11 7 NORMAL START UP 13 8 NORMAL STOP 14 9 LONG TERM STOP 15 10 GENERAL RUNNING AND OPERATION CONDITION18 11 R O MODULE FOULING 19 12 CHEMICAL CLEANING AGENTS 23 13 TROUBLE SHOOTING 26 14 MAINTENANCE 27 ...

Page 3: ...on the unit has to be operated with feed water free from organic contamination such as oil grease etc The turbidity suspended matter of the feed water has to be lower than 0 5 NTU Only open sea water is permitted harbour water can contain up to 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...

Page 4: ...feed water filter F 2010 and you can see the pressure on the pressure indicator PI 2011 The flush water filter F 2020 contains an activated carbon cartridge the purpose of the filter is to de chlorinate the flushing water from the storage These filters will absorb suspended matter larger than 10 micron size DESALINATION WITH REVERSE OSMOSIS The feed water will then continue to the high pressure pu...

Page 5: ... 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: ...ter CN 2010 20 mm Hose nipple Inlet flush water CN 2020 3 8 Plastic tube Outlet product CN 2060 3 8 Plastic tube Outlet product to waste CN 2050 3 8 Plastic tube Outlet brine to waste CN 2050 3 8 Plastic tube RACK MOUNTED Inlet feed water CN 2010 3 8 R Inside Inlet flush water CN 2020 3 8 R Inside Outlet product CN 2060 3 8 R Inside Outlet waste CN 2050 3 8 R Inside WATER PRESSURE Feed water Min 1...

Page 7: ... filter air venting and cartridge replacement Also note that the flush water filter has to be connected to the existing fresh water system and a carbon cartridge filter must be used in the filter PUMP MODULE HPP 2010 When the high pressure pump HPP 2010 is driven by an electric motor there must be sufficiently ventilation in order to transfer the waste heat from the electric motor The pump module ...

Page 8: ...O WASTE The brine outlet must be led off above the sea level PRODUCT WATER TO TANK The product from the unit must be led to the fresh water storage tank PRODUCT WATER TO WASTE The product to waste shall be located so that no seawater or other contaminated water can flow backwards after shut down of the unit When the unit is stopped air will flow backwards into the R O modules to prevent vacuum in ...

Page 9: ...urface 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 NOTE Mount an operate safety switch for the electrical connections to the unit ...

Page 10: ...table PRODUCT WATER TO TANK CN 2060 The product from the unit must be led to the fresh water storage tank BRINE AND PRODUCT WATER TO WASTE CN 2050 The brine product to waste shall be located so that no seawater or other contaminated water can flow backwards after shut down of the unit When the unit is stopped air will flow backwards into the R O modules to prevent vacuum in the system NOTE Do not ...

Page 11: ...on 041027 10 28 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 ...

Page 12: ...P 1010 by the switch marked SYSTEM Start the high pressure pump HPP 2010 by turning the switch marked HP PUMP into position AUTO NOTE If feedwater pressure decreases to less than 0 5 bar the unit will stop by the low pressure switch PLCO 2010 4 Stop the conductivity meter 1u400 by turning the switch marked SALINITY to OFF position The product will then automatically go to waste since the ROV 2060 ...

Page 13: ... 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: ... switch marked HP PUMP into position AUTO NOTE If feedwater pressure decreases to less than 0 5 bar the unit will stop by the low pressure switch PLCO 2010 Adjust the operate pressure as recommended in GENERAL RUNNING AND OPERATION NOTE If the unit has been shut down for more than two days run the first amount of product water to waste for at least 15 minutes Close the conductivity meter 1u400 by ...

Page 15: ...one 1 week the above steps are all that is required However if the desalination unit is to be shut down for over one week it should be flushed weekly as above Or if the unit is equiped with automatic flushing it will flush automatically at 100 hours shutdown preset from factory SHUT DOWN FOR A LONG PERIOD If the unit is to be shut down for a considerable length of time over one 1 week or when the ...

Page 16: ...n the plastic bin Stop the unit 4 Close the conductivity meter 1u400 by turning the switch marked SALINITY in position OFF The product will then automatically go to waste since ROV 2060 are not activated NOTE Units equipped with optionally conductivity meter will route the product flow to waste when turning the switch marked SALINITY to OFF position 5 Pour one plastic bottle of MT 5 solution into ...

Page 17: ...ENGLISH Version 041027 16 28 11 Do not start the feedwater pump ...

Page 18: ...NOTE 3 Maximum allowed preservation time with MT 5 is 1 year If the unit has the intention to be shut down for a longer period than 1 year the unit must be preserved again as above WARNING 1 The use of chlorine or quaternary ammonium chloride types of conservation solution is prohibited The use of such chemical agents will cause irreparable loss of productivity and gradual deterioration of the R O...

Page 19: ... VAC units and depends on the salt content and temperature in the feed water Maximum product flow depends on the type of unit as below Normal product flow depends on a 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 MT 5500 MT 6000 Ma...

Page 20: ...pared to the product water flow and can be determined by measuring the brine flow from the unit The brine flow should exceed 8 litres min The reason when the feedwater flow is to low is loose V belt on the high pressure pump See Belt Tensioning The reason can also be a fouled pump valve See high pressure pump in the component data sheet section METAL OXIDES Fouling with metal oxides is caused by t...

Page 21: ...l fouling can occur when the feedwater contains sufficient nutrients to sustain rapid growth of organisms inside the R O module This growth can lead to deposition of slimes causing R O module fouling and poor performance 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 ...

Page 22: ...water be produced in the cleaning tank Stop the unit as described in NORMAL STOP 4 Close the bottom valve upstream mesh filter if installed 5 Disconnect the plugged connection CN 2015 and connect a plastic hose and insert its other end into the cleaning tank containing the 40 litres of product water On units with chemical cleaning equipment turn the feed water cleaning 3 valve CCV 2055 in position...

Page 23: ...h feedwater run the unit with fully open pressure regulating valve and product water valve open to waste For flushing with freshwater open the flush water valve and keep the product water valve open to waste 16 Continue with the next type of cleaning or if the unit is intended to be in service reconnect all service hoses and start the unit as described in INITIAL START UP PROCEDURE WARNING For ini...

Page 24: ...r has to be de chlorinated by a carbon filter Product water from the unit can be used direct Use gloves and protection glasses MT 10 CHEMICAL CLEANING Shall be used as a general cleaning procedure when the product flow has decreased with 10 15 below rated flow or the conductivity has increased to 1200 µS cm On units equipped with conductivity control alarm the alarm will be released at 1200 µS cm ...

Page 25: ...as described in INITIAL START UP PROCEDURE If the unit is intended to be stored you must leave it with the MT 5 solution Do not flush the unit then MT 5 PRESERVATION This solution shall be used when the unit will be out of service for more then 1 week and you are not intended to flush it every week Prepare MT 5 Preservation Add one plastic bottle of MT 5 to the 40 litres cleaning tank containing p...

Page 26: ...ix well Re circulation time MT 20 1 hour Best temperature for treatment is 35 C Lowest allowed temperature is 25 C Highest allowed temperature is 40 C If the unit is intended to be in service you must flush the unit with flush water during 15 minutes Proceed with the INITIAL START UP PROCEDURE If the unit is intended to be shut down for a long period flush it as above and then prepare it as descri...

Page 27: ...mp sealing repair if required HIGH PRESSURE PUMP HPP 2010 WILL NOT START 1 Check the current and power HIGH PRESSURE PUMP STARTS BUT STOPS AFTER 1 30 MINUTES 1 The power overload has stopped the pump Check the current Check the air ventilation around the electric motor PRODUCT FLOW HAS DECREASED BY MORE THAN 10 15 1 Clean the unit as described in CHEMICAL CLEANINGS PROCEDURES ALARM AT HIGH CONDUCT...

Page 28: ...nts Refill with SAE 40 weight motor oil with antiwear and rust inhibitor BELT TENSIONING when V belting Adjust the V belt to the greatest tension that will allow a belt movement of 1 cm when pushed lightly at mid span by the hand with about 2 kg force To adjust the belt tension sufficiently loosen the four base plate bolts of the motor and then adjust the belt tension by turning the two small nuts...

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