background image

Operation Manual 
KRO3000 

 

 

 

 

 

 

 

 

 

Rev 2 

 

 

5

4.0  Process Description and System Components 

 

4.1 General Process 

 

This is to be read in conjunction with the General Arrangement drawing (Figure 1). 

 
The raw water is pre treated before entering the KRO3000. The first stage of pre treatment is a 
water softener which eliminates hardness to prevent scaling problems.  
 
The softened water flows to a carbon filter to remove the chlorine which is detrimental to RO 
membranes. Following the carbon filter the water passes through a 5 and 1 micron filters 
arrangement to remove suspended material.  
 
Filtered water is pumped via a high pressure (boost) pump through the RO housing, containing 
the membrane. 

Permeate

 (treated water) is sent to a break tank and the 

Reject

 (brine) is sent to 

the drain. 
 

Recycle

 line is also provided, this line goes from the reject line to the pump suction line. The 

purpose of the recycle is to create a hydraulic equilibrium, correct recovery rate and system 
pressure.   
 
The system is completed with an inlet solenoid valve. This valve automatically turns off the water 
supply between the feed water and the membrane. A level control inside the tank sends a signal 
to the valve to close when the tank is full. Once the level in the tank is low, the level control sends 
another signal to the solenoid valve to permit the flow of raw water into the system. Every time 
the valve opens/closes the system will start/stop automatically. 
 
A Flush solenoid valve is also provided with the unit. This valve is under the control of a timer.  
Periodically the valve opens to flush the membrane at low pressure. This extends the periods 
between membrane cleans.  

 

4.2 System Components 
 

4.2.1 Water 

Softener 

 

The water is 

Hard

 when Calcium and Magnesium are dissolved in it. These salts precipitate out of 

the water causing scaling problems. To prevent this situation the water is pre treated using a 
water softener.  
 
Raw water flows through a 

media (small plastic beads or chemical zeolite) 

covered in sodium 

ions. The calcium and magnesium ions are replaced with sodium ions. As sodium does not 
precipitate out of the water, the scaling problem is eliminated. 
 
However, the media is exhausted after certain amount of water has been treated. This is because 
no more sodium ions are available to swap places with calcium and magnesium. Consequently, 
the media needs to be regenerated.  
 
The regeneration process is very simple. The media is soaked with a Sodium Chloride (brine 
tank) solution. The sodium ions change places with the calcium and magnesium trapped in the 
media. In this way the media is being regenerated and is ready to exchange the sodium ions 
again. The remaining brine plus all of the calcium and magnesium is flushed through a drain. 
 
The regeneration cycles on the KRO3000 systems are programmed based on the hardness of 
the inlet water. 
 

Summary of Contents for KRO - 3000

Page 1: ...dox Street Alexandria NSW 2015 Sydney Australia Prepared by Chatoyer Holdings Pty Ltd ABN 99 080 301 515 www chatoyer com au BRISBANE OFFICE 14 Parkview Street Milton QLD 4064 PO Box 2156 Milton QLD 4064 Tel 07 3367 3866 Fax 07 3367 2886 brisbane chatoyer com au ...

Page 2: ......

Page 3: ... 4 2 5 RO Membrane 6 4 2 6 Conductivity Monitor 6 4 2 7 Reject Control Valve 6 4 2 8 Recycle Control valve 7 4 2 9 Flush Solenoid Valve 7 4 2 10 Rotameters 7 4 2 11 Pressure Gauges 7 4 2 12 Low Pressure Switch 7 4 2 13 Float Switch 7 4 2 14 Pressure Reducing Valve 7 5 0 Installation Guide 7 6 0 Description of Operation 8 6 1 Starting Up the Unit 8 6 2 Shutting Down the Unit 9 7 0 Maintenance 9 8 0...

Page 4: ...ng and possible irreversible damage to the reverse osmosis membrane 2 0 Pre Treatment Rarely in fact almost never is water suitable for direct entry to the membrane housing Table 1 shows a number of contaminants present in raw water capable of causing a permanent damage to the membranes Please note these are the main contaminants However other salts or metals may be encountered and would require a...

Page 5: ...anual is applicable for model KRO3000 3 0 System Configuration 3 1 The KRO3000 is completed with the following items RO membrane and Stainless Steel membrane Housing Stainless Steel frame Carbon 5 Micron 1 Micron cartridge filters Horizontal Booster Pump Low pressure protection switch Solenoid valve Permeate Reject and Recycle Rotameters Digital controller CM 230 Conductivity meter Feed water pres...

Page 6: ...mit the flow of raw water into the system Every time the valve opens closes the system will start stop automatically A Flush solenoid valve is also provided with the unit This valve is under the control of a timer Periodically the valve opens to flush the membrane at low pressure This extends the periods between membrane cleans 4 2 System Components 4 2 1 Water Softener The water is Hard when Calc...

Page 7: ... membrane can work under the conditions of normal pressure and seal arrangement Caution The operator should apply silicon grease on the Y type plastic ring in order to ensure proper sealing of the membrane brine seal 4 2 5 RO Membrane RO membrane is the key component of the RO main unit and has a determinative effect on the quantity and quality of water produced The RO membrane utilizes pressure e...

Page 8: ...n with the controller shuts down the unit in the event of low feed pressure 4 2 13 Float Switch A facility is provided to connect an external float switch in the permeate storage tank When the circuit is broken between the HIGH LEVEL contacts no volt the unit automatically stops The unit will remain on standby until the level in the tank drops remaking the circuit 4 2 14 Pressure Reducing Valve PR...

Page 9: ...t flow rate will not be visible in the reject rotameter 6 1 7 After a few minutes the flush valve will close The reject flow rate should be at the maximum rate in the rotameter 6 1 8 Slowly close in the reject valve and the recycle valve to attain the correct operating pressures and reject flow rates The correct operating conditions depend on Feed Temperature Feed water analysis Calculated recover...

Page 10: ...embrane fouling will occur if the unit is idle for long periods 7 0 Maintenance 7 1 The membranes should be cleaned about every six months or whenever performance diminishes as set out above 7 2 Please consult your supplier to arrange cleaning of the membrane s 7 3 The filter cartridge should be replaced every four months as minimum 7 4 Additional pre treatment should be serviced in accordance wit...

Page 11: ...on Reset check current setting Allow to cool HP Pump starts but water Pressure low Flush Valve Open Recycle valve fully open Reject valve fully open Pump fault Pump cavitation Wait until flush cycle completes Close valve in Close valve in Inspect pump Bleed air from pump HP Pump starts but Trips Motor Overload Check motor and pump Check overload setting Check controller Excessive Membrane Pressure...

Page 12: ... the surface of the brine tank 4 Keep record of the last change of filters 5 If a problem is identified please refer to the Trouble Shooting section Section 8 0 or call your supplier of the unit Caution THE SALT USED FOR REGENERATION OF THE WATER SOFTENER MUST BE CROWN HG WATER SOFTENER SALT NO OTHER SALT CAN BE USE FOR REGENERATION 10 0 Expected Values Table 5 shows the expected flow rates and pr...

Page 13: ...Operation Manual KRO3000 Rev 2 12 Appendices ...

Page 14: ...Operation Manual KRO3000 Rev 2 13 Appendix I ...

Page 15: ...Operation Manual KRO3000 Rev 2 14 Appendix II ...

Page 16: ...Operation Manual KRO3000 Rev 2 15 Appendix III ...

Page 17: ...Softener Filter Water Control System Installation Operation and Maintenance Manual Autotrol Performa Cv This system installed by ...

Page 18: ...e O D 1 050 inches 27 mm Distributor Tube Length 1 2 1 2 inches 13 mm 13 mm above top of tank Operating Valve Body Glass Filled Noryl Rubber Components Compounded for cold water Weight Valve with Control 4 5 lbs 2 0 kg Transformer Output 12 VAC 400 mA 4 6 vA Transformer Input 115V 50 60 Hz 230V 50 60 Hz 100 V 50 60 Hz Operating Pressure 20 to 120 psi 1 37 to 8 27 bar Canada 20 to 100 psi 1 37 to 6...

Page 19: ...male Brine Line 3 8 inch NPT male Distributor Tube O D 1 050 inches 27 mm Distributor Tube Length 1 2 1 2 inches 13 mm 13 mm above top of tank Operating Valve Body Glass filled Noryl Rubber Components Compounded for cold water Weight Valve with Control 4 5 lbs 2 0 kg Transformer Output 12VAC 400 mA 4 6 vA Transformer Input 115V 50 60 Hz 230V 50 60 Hz 100V 50 60 Hz Operating Pressure 10 to 120 psi ...

Page 20: ...cid fumes 7 The use of resin cleaners in an unvented enclosure is not recommended Water Line Connection The installation of a bypass valve system is recommended to provide for occasions when the water conditioner must be bypassed for hard water or for servicing The most common bypass systems are the Autotrol Series 1265 bypass valve Figure 1 1 and plumbed in globe valves Figure 1 2 Though both are...

Page 21: ...NK OVERFLOW will direct overflow to the drain instead of spilling on the floor where it could cause considerable damage This fitting should be on the side of the cabinet or brine tank To connect overflow locate hole on side of brine tank Insert overflow fitting not supplied into tank and tighten with plastic thumb nut and gasket as shown Figure 1 4 Attach length of 1 2 inch 1 3 cm I D tubing not s...

Page 22: ...tting Press the SET button The numbers stop flashing and the control accepts the new setting After approximately 30 seconds the control starts alternating the display between Time of Day and Capacity Note If a beep sounds the new setting is not accepted because it was outside the allowable range The old value will be displayed Day of Week Time of Day Press the SET button The display will show the ...

Page 23: ...is allowed Table 2 1 Level I Programming Performa Cv 962 Parallel Multi Tank or Single Tank Softener Parameter Range of Values Minimum Increments Factory Value Units of Measure Notes Name Description P1 Time of Week and Time of day 1 7 1 00 to 12 59 AM or PM Metric 1 7 00 00 to 23 59 1 day 1 minute None Hour minute Range depends on value selected for P13 For day of week SUN 1 MON 2 TUE 3 WED 4 THU...

Page 24: ...tank P7 Brine draw rate 2 200 1 Selected from Table 2 2 This number tells the controller the draw rate based on the injector size The swell time in the draw position is then calculated P9 Backwash time 4 60 1 14 Minutes May be adjusted for application P10 Slow Rinse time 7 125 1 40 Minutes May be adjusted for application This time does not include the calculated brine draw time P11 Fast Rinse time...

Reviews: