Xylem 19-001-251R3 User Manual

INSTRUCTION MANUAL
19-001-251R3
INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
Floboy
VFD Pumping System
NOTE: This product is not intended for use in potable water applications.
Acknowledgements
All materials ©2013 by Flowtronex®, an Xylem company.
Flowtronex® is a registered trademark of Xylem Flowtronex.
All rights reserved. No parts of this work may be reproduced in any form or by any means - graphic, electronic, or mechanical, including photocopying, recording, taping, or information storage and retrieval systems - without the written permission of the publisher.
Products that are referred to in this document may be either trademarks and/or registered trademarks of the respective owners. The publisher and the author make no claim to these trademarks. These include Microsoft, Windows, Windows NT, ActiveX that are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. ©2013 Microsoft Corporation. All rights reserved.
WHILE EVERY PRECAUTION HAS BEEN TAKEN IN THE PREPARATION OF THIS DOCUMENT, THE PUBLISHER AND THE AUTHOR ASSUME NO RESPONSIBILITY FOR ERRORS OR OMISSIONS, OR FOR DAMAGES RESULTING FROM THE USE OF INFORMATION CONTAINED IN THIS DOCUMENT OR FROM THE USE OF PROGRAMS AND SOURCE CODE THAT MAY ACCOMPANY IT. IN NO EVENT SHALL THE PUBLISHER AND THE AUTHOR BE LIABLE FOR ANY LOSS OF PROFIT OR ANY OTHER COMMERCIAL DAMAGE CAUSED OR ALLEGED TO HAVE BEEN CAUSED DIRECTLY OR INDIRECTLY BY THIS DOCUMENT.
TABLE OF CONTENTS
ACKNOWLEDGEMENTS II
TABLE OF CONTENTS ·········································· I
TABLE OF FIGURES ············································· II
WARRANTY INFORMATION ··································· 2
SAFETY ······························································· 3
Safety instructions .................................................... 3
Safety Reminders ..................................................... 3
Additional Safety Information ................................... 4
Safety Apparel .......................................................... 4
Coupling Guards ...................................................... 4
Operation .................................................................. 4
Maintenance Safety .................................................. 4
GENERAL DESCRIPTION ······································ 5
Product Description .................................................. 5
Operational Limits .................................................... 5
Nameplate Information ............................................. 5
Station Numbering: ................................................... 6
Example: FBSNV4BF10D46R3ABD ........................ 6
handling .................................................................... 7
Storage ..................................................................... 7
Field Connection Diagrams ...................................... 7
Ground Connections ................................................ 7
RECEIVING ·························································· 8
Preparing to Receive the Pump Station ................... 8
Inspecting the Shipment ........................................... 8
Unpacking and Storing This Equipment ................... 8
INSTALLATION ···················································· 8
Location .................................................................... 8
Foundation ............................................................... 9
Anchoring the Station ............................................... 9
Suction Piping .......................................................... 9
Discharge Piping .................................................... 12
Electrical Connections ............................................ 12
START-UP AND ADJUSTMENTS ···························· 13
Power Check .......................................................... 13
Voltage Variance .................................................... 13
Voltage Imbalance .................................................. 13
Pump Priming ......................................................... 13
Pump Rotation ........................................................ 14
System Pressurization ............................................ 15
Priming Line Adjustment ........................................ 15
Overload Trip Adjustment ....................................... 15
STATION OPERATION ·········································· 16
DOOR SWITCH OPERATION ............................... 16
Individual Pump Switches .............................. 16
OPERATIONAL SETTINGS IN THE HMI .............. 16
Auto-Manual Select ........................................ 16
LDP Override ................................................. 16
Reset Control (F5) .......................................... 16
Resetting Faults ............................................. 16
AUTOMATIC OPERATION .................................... 17
Overview ........................................................ 17
System Charging Mode .................................. 17
NORMAL OPERATION .......................................... 17
MANUAL VFD OPERATION .................................. 18
CONTROLLER BYPASS OPERATION ................. 19
Overview ........................................................ 19
SYSTEM SAFETIES .............................................. 19
Fault Reset ..................................................... 19
Low Discharge Pressure ................................ 19
High Discharge Pressure ............................... 19
Low Inlet Pressure ......................................... 20
Loss of Prime ................................................. 20
INDIVIDUAL PUMP FAULTS ......................... 21
Overload Protection ....................................... 21
High Pump Temperature (Optional) ............... 21
VFD Fault ....................................................... 21
NAVIGATING THE CONTROLS ······························· 21
Overview ................................................................ 21
Pump Status Indicators .......................................... 22
Pressure Setpoint Adjustment ................................ 22
Trends and Alarms ................................................. 23
Totals ..................................................................... 24
Pump Control ......................................................... 24
Start settings .......................................................... 24
Stop Settings .......................................................... 24
Speed Test ............................................................. 25
Safety ..................................................................... 25
Panel Config ........................................................... 25
Sys Config .............................................................. 25
PID Parameters ...................................................... 25
Other Settings ........................................................ 25
MAINTENANCE ···················································· 26
REGULAR MONTHLY MAINTENANCE INTERVALS
............................................................................... 26
Heat exchanger: ............................................. 26
Control panel: ................................................. 26
Motor lubrication: ............................................ 26
Pumps - horizontal: ........................................ 26
Sound and visual checks of whole station: .... 26
Station skid: .................................................... 26
WINTERIZING the PUMP STATION ..................... 27
Winterizing ..................................................... 27
Spring Restart ................................................ 27
TROUBLESHOOTING ············································ 28
LOW DISCHARGE PRESSURE FAULT ............... 28
HIGH DISCHARGE PRESSURE FAULT ............... 29
LOW LEVEL FAULT .............................................. 29
LOW INLET PRESSURE FAULT ........................... 29
LOSS OF PRIME FAULT ....................................... 30
VFD FAULT ............................................................ 30
MOTOR WON’T START ........................................ 31
GLOSSARY OF TERMS ········································· 32
APPENDIX A — FINAL CHECK LIST ························ 35
APPENDIX B — ELECTRICAL WIRING AND CONTROL SETTINGS FINAL CHECKLIST ················ 36
TABLE OF FIGURES
Figure 1: Typical Floboy suction and discharge piping, Boost applications ....................................................... 5
Figure 2: Typical Floboy suction and discharge piping, Lift applications ........................................................... 5
Figure 3: Sample Nameplate ............................................................................................................................. 6
Figure 4: Typical Floboy installation on slab. ..................................................................................................... 9
Figure 5: Anchoring the station to the concrete slab. ......................................................................................... 9
Figure 6: Proper suction lift principles .............................................................................................................. 11
Figure 7: Improper suction lift application ........................................................................................................ 11
Figure 8: Proper installation of pump ............................................................................................................... 12
Figure 9: Confirm rotation by making sure motor is operating in the direction of the motor tag ...................... 15
Figure 10: Floboy controller. ............................................................................................................................ 22
Figure 11: Main Screen .................................................................................................................................... 22
Figure 12: Pump Status Indicators ................................................................................................................... 22
Figure 13: Perssure Setpoint ........................................................................................................................... 22
Figure 14: Setpoint Password Entry Screen .................................................................................................... 22
Figure 15: Entering the password for the setpoint screen ............................................................................... 23
Figure 16: Changing the setpoint ..................................................................................................................... 23
Figure 17: Performance Graph ........................................................................................................................ 23
Figure 18: Alarms Screen ................................................................................................................................ 23
Figure 19: Alarm Description ........................................................................................................................... 23
Figure 20: Menu ............................................................................................................................................... 24
Figure 21: Totals .............................................................................................................................................. 24
Figure 22: Pump Control .................................................................................................................................. 24
Figure 23: Stop Settings .................................................................................................................................. 24
Figure 24: Pump Control, Combo Selection .................................................................................................... 24
Figure 25: Speed Test ..................................................................................................................................... 25
Figure 26: Safety .............................................................................................................................................. 25
Figure 27: Safety, Others ................................................................................................................................. 25
Figure 28: Panel Configuration ........................................................................................................................ 25
NOTE: The information contained in this book is intended to assist operating personnel by providing information about the characteristics of the purchased equipment.
It does not relieve the user of their responsibility of using accepted engineering practices in the installation, operation, and maintenance of this equipment.
For additional questions, contact:
XYLEM FLOWTRONEX
8:00 AM to 5:00 PM Central time (800) 786-7480 x3
5:00 PM to 8:00 AM Central time
After Hours technician for emergency assistance: (214) 454-5768
support@flowtronex.com
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WARRANTY INFORMATION
Company warrants title to the product(s) and, except as noted below with respect to items not of Company’s Manufacturer, also warrants the product(s) on date on shipment to Purchaser, to be of the kind and quality described herein, and free of defects in workmanship and material.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MECHANTABILITY AND FITNESS, AND CONSTITUTES THE ONLY WARRANTY OF COMPANY WITH RESPECT TO THE PRODUCT(S).
If within one year from date of initial operation, but nor more than eighteen months from date of shipment by Company of any item of product(s), Purchaser discovers that such item was not as warranted above and promptly notifies Company in writing thereof, Company shall remedy such non-conformance by, at Company affected part of the product(s). Purchaser shall assume all responsibility and expense for removal, reinstallation, and freight in connection with the
foregoing remedies. The same obligations and conditions shall extend to replacement parts furnished by Company hereunder. Company shall have the right of disposal of parts replaced by it.
ANY SEPARATELY LISTED ITEM OF THE PRODUCT(S) WHICH IS NOT MANUFACTURED BY THE COMPANY IS NOT WARRANTED BY COMPANY and shall be covered only the express warrant, if any, of the manufacturer thereof.
THIS STATES PURCHASER’S EXCLUSIVE REMEDY AGAINST COMPANY AND ITS SUPPLIERS RELATING TO THE PRODUCT(S), WHETHER IN CONTRACT OR IN TORT OR UNDER ANY OTHER LEGAL THEORY, AND WHETHER ARISING OUT OF WARRANTIES, REPRESENTATIONS, INSTRUCTIONS, INSTALLATIONS OR DEFECTS FROM ANY CAUSE. Company and its suppliers shall have no obligation as to any product which has been improperly stored and handled, or which has not been operated or maintained according to instructions in Company or supplier furnished manuals.
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SAFETY
Read all safety information prior to installation of your pumping system.
SAFETY INSTRUCTIONS
SAFETY INSTRUCTION
This is a SAFETY ALERT SYMBOL. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death!
FAILURE TO FOLLOW THE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD.
DANGER
Indicates a potentially hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation, which if not avoided, may result in minor or moderate injury.
CAUTION
Used without the safety alert symbol indicates a potentially hazardous situation, which, if not avoided, may result in property damage.
All operating instructions must be read, understood, and followed by the operating personnel. Flowtronex accepts no liability for damages or operating disorder which are the result of non compliance with the operating instructions.
When the Pumping System components reach the end of life the components should be disposed of or recycled in accordance with local laws.
SAFETY REMINDERS
1. This manual is intended to assist in the installation, operation, and repair of the system and must be kept with the system.
2. Installation and maintenance MUST be performed by properly trained and qualified personnel.
3. Review all instructions and warnings prior to performing any work on the system.
4. Any safety decals MUST be left on the controller and pump.
5. The system MUST be disconnected from the main power supply before attempting any operation or maintenance on the electrical or mechanical part of the system. Failure to disconnect electrical power before attempting any operation or maintenance can result in electrical shock, burns, or death.
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ADDITIONAL SAFETY INFORMATION
This pump has been designed for safe and reliable operation. A pump is a pressure-containing device with rotating parts that could be hazardous.
Operators and maintenance personnel must realize this and follow necessary safety measures. Proper safety procedures must be followed. Xylem Flowtronex shall not be liable for damage or delays caused by a failure to observe the instructions in this manual.
SAFETY APPAREL:
Wear insulated work gloves when handling hot bearings or using bearing heater.
Wear heavy work gloves when handling parts with sharp edges, especially impellers.
Wear safety glasses (with side shields) for eye protection, especially in machine shop areas.
Wear steel-toed shoes for foot protection when handling parts, heavy tools, etc.
Wear other personal protective equipment to protect against hazardous/toxic fluids.
COUPLING GUARDS:
Never operate a pump without a coupling guard properly installed.
Never force piping to make a connection with a pump.
Use only fasteners of the proper size and material.
Ensure there are no missing fasteners.
Beware of corroded or loose fasteners.
OPERATION:
Do not operate below minimum rated flow, or with suction/discharge valves closed.
Do not open vent or drain valves, or remove plugs while system is pressurized.
MAINTENANCE SAFETY:
Always lock out power.
Ensure power is isolated from system and
pressure is relieved before disassembling pump, removing plugs, or disconnecting piping.
Use proper lifting and supporting equipment to prevent serious injury.
Observe proper decontamination procedures.
Know and follow company safety regulations.
Never apply heat to remove impeller.
Observe all cautions and warnings
highlighted in pump instruction manual.
GENERAL DESCRIPTION
PRODUCT DESCRIPTION
Floboy Pumping Systems are self-contained, pre-assembled and factory-tested pumping systems. Floboy utilizes state of the art technology, yet employs a simplistic and straight forward design that makes installation, operation and maintenance an easy task, even for the most inexperienced of operators.
This manual will serve as a guide to understanding the features of Floboy Pumping Systems and provide a quick and clear reference for answers to most questions pertaining to its service. Every attempt has been made to explain all facets of system operation and maintenance for a variety of applications. However, should you have specific questions not explained or illustrated in this manual you are encouraged to contact your nearest Floboy Pumping Systems distributor, representative or the factory.
Floboy utilizes a single main pump (with or without a pressure maintenance pump) to supply water to a turf irrigation system or other non­potable application requiring water at a constant pressure. Because Floboy is a totally automatic system, the pump is energized whenever a demand for water is sensed (pressure start). Conversely, the pump is de-energized when the demand no longer exists (pressure stop or flow stop). In this manner, pressure is maintained in any system at all times, thereby reducing piping fatigue and minimizing the introduction of air into the piping network.
For those customers who wish to start and stop a pump based on a remote signal, as with an irrigation controller, this function is available as a selectable option on all models of Floboy. The system can be controlled using 24V AC/DC signal outputs from an irrigation controller or other control devices (relay start).
Figure 1: Typical Floboy suction and discharge
piping, Boost applications
Figure 2: Typical Floboy suction and discharge
piping, Lift applications
OPERATIONAL LIMITS
See pumping system nameplate information for pumping system flow capacity, pressure, full load current and electrical ratings.
Unless special provisions have been made for your pumping systems, the system pressure rating is 175 psi for end suction centrifugal.
NAMEPLATE INFORMATION
The system nameplate gives identification and rating information as shown below.
6
Figure 3: Sample Nameplate
Field
Explanation
Voltage
Required input voltage
SCCR
Short circuit current rating
Phase
Number of motor phases
FLA
Full load amps
Hz
Required frequency (hertz)
Max. HP
Maximum horsepower
Permanent records for this system are referenced by the serial number. Include the serial number with all correspondence and spare parts orders.
STATION NUMBERING:
EXAMPLE: FBSNV4BF10D46R3ABD
08FB=Floboy II
1. Size Code
a. S=Small (52”l x 40”w x 45”h)
b. M=Mid (64”l x 53” w x 55” h’)
2. Lift or Boost
3. Control Type: V = VFD
4. Pump model
5. Horsepower
6. Impeller Code. Specific to type of pump used.
7. Voltage (46=460, 23=230, 20=208)
8. Start/Stop Control. R=Relay, F=Flow, P=Pressure. Floboy 2009 models are field configurable between models, unlike the previous Floboy systems.
9. Phase: 3=3 Phase, 1=single phase. 3­Phase power is generally more efficient and less expensive per KWH, but may not be available.
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HANDLING
Qualified personnel should unload and handle the unit. Prevent damage due to dropping or jolting when moving the unit. Thoroughly inspect the unit for damage upon receipt. Immediately notify the carrier of transportation damage. Ensure that sensing lines are free of crimps and kinks.
The unit is top heavy due to the position of the equipment. Do not use component eyebolts to lift the pump station.
WARNING: Falling Objects Hazard
Eyebolts, if provided, are designed to lift only the components to which they are attached.
Failure to follow these instructions could result in serious personal injury, death, and/or property damage.
STORAGE
During periods of storage, the unit should be covered to prevent corrosion and contamination from dirt. Store the unit in a clean, dry location to prevent condensation and freezing. After storage, check that it is dry before applying power. Specific component storage instructions must be followed in accordance with the respective equipment manufacturer's recommendations.
CAUTION: Extreme Temperature Hazard
Extreme temperatures are to be avoided. (Below 32ºF and above 110ºF.)
Failure to follow these instructions could result in serious property damage and/or moderate personal injury.
FIELD CONNECTION DIAGRAMS
Actual equipment manufacturers/models installed are system specific. Refer to specific manufacturers’ Installation, Operation & Maintenance Manuals for details unique to each component. The pump instruction manual is supplied with the system (if applicable).
Review the wiring diagrams and dimensional drawings prior to unit installation and operation. Typical wiring diagrams are included in Appendix D.
NOTE: Electrical supply must match the control panel nameplate specification. Incorrect voltage can cause fire, damaging electrical components and void the warranty.
NOTE: Electrical supply must be installed by a qualified electrician in accordance with all applicable codes, ordinances, and good practice.
GROUND CONNECTIONS
A grounding terminal is provided for a dedicated ground wire connection. All provisions of the National Electrical Code and local codes must be followed.
WARNING: Electrical Shock Hazard
Conduit grounds are not adequate. A separate ground wire must be attached to the ground lug provided in the enclosure to avoid potential safety hazards.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
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RECEIVING
PREPARING TO RECEIVE THE PUMP STATION
Each Floboy Pumping System is shipped on a wooden pallet and is enclosed in either a cardboard box or shrink wrap. It will probably arrive in an enclosed van or semi-trailer which will require specialized equipment, such as a fork lift, to off-load. Please remember, it is your responsibility to provide a safe and secure means to remove this equipment from the carrier's vehicle. Once you take possession of the pump station, the freight carrier is no longer responsible for damage due to mishandling.
CAUTION
Caution: This equipment is heavy. Do not attempt to pick it up or move it manually. Bodily injury may result.
INSPECTING THE SHIPMENT
Inspect the pump station for damaged goods
prior to accepting shipment. Note all damages or missing components on the "Bill of Lading".
Note: When the pump station arrives, it is your responsibility to inspect this equipment for damage or lost goods prior to signing the carrier's freight bill.
Should you notice shorted or damaged goods, you must make a notation to that effect on the face of the "freight bill" and keep a copy so a claim can be processed with the freight company. If you give
the freight company a clear receipt for goods that have been damaged or lost in transit you do so at your own risk and expense.
If you receive the pump station and subsequently discover damaged equipment or lost goods that were concealed by the packaging you must contact the freight company immediately. Do not proceed with the system's installation until the freight company has inspected this equipment. A "Concealed Damage Report" must be made within 15 days of receiving the equipment or any claim of loss will not be honored.
The factory will assist you in every possible manner to collect a claim for loss or damage but be advised that the laws of interstate commerce make it your responsibility to file, process and collect all claims directly from the freight company or its agent.
UNPACKING AND STORING THIS EQUIPMENT
When cutting the packaging with a knife or razor, take care not to scratch the paint on the metal enclosure. If the pump station is to be stored for any period of time, make certain it is left in a secure location, preferably one which is free of excessive moisture and freezing conditions.
INSTALLATION
LOCATION
Locate the pumping system in a clean, well ventilated, and properly drained location. It is recommended that the location selected facilitates ease of inspection, maintenance, and service. Outside installation requires protection from freezing.
The factory recommends positioning the Floboy Pumping System on a concrete slab that provides a permanent and supportive base. The system should be positioned as close to the intended source of water as possible. For systems lifting water from a lake or pond, the pump station elevation should be close to the water surface elevation. In most cases the pump site should never be more than five feet above the minimum water elevation as long as this elevation is above the normal flood plane.
9
Concrete slabs should be at least 6" thick and be constructed in a monolithic pour from 3000 psi concrete and #5 rebar. The slab should be sized with a minimum of 6" clearance between the edge of the slab and the edge of the pump station.
Please note that it is the customer's responsibility to meet all local code and seismic requirements.
WARNING: Falling Objects Hazard ­Heavy Load, May Drop If Not Lifted
Properly.
Do not lift the entire unit by component eyebolts. Eyebolts on components are used for factory assembly only and are not intended to lift the complete package.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
FOUNDATION
With proper installation and a suitable foundation, this unit is built to supply years of service. Establish a base of concrete weighing a minimum of 2-1/2 times the weight of the unit. (Check the shipping tickets or the pumping system drawing for unit weight.) Tie the concrete pad in with the finished floor. Use the appropriate anchor bolts to secure the pumping system to the foundation.
Pump packages with electrical conduit below surface may require corrosion protection approved for this condition.
WARNING: Electrical Shock Hazard
Electrical conduit installed below the surface may require a corrosion resistant protective coating to prevent conduit corrosion and electrical shock.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
Place the unit on its concrete foundation, supporting it with steel wedges or shims. These wedges or shims should be put on both sides of each anchor-bolt and midway between the bolts, to provide a means of leveling the base.
After the pumping system has been leveled, install the correct number of anchor bolts and tighten to secure the system.
Figure 4: Typical Floboy installation on slab.
ANCHORING THE STATION
It is always advisable to anchor the station to the concrete slab or support structure in two or more locations. Four 1/2" diameter holes have been provided in the base of the pump station skid for this purpose. Concrete anchors, such as 3/8" x 4" Redheads, work well on most concrete structures.
Anchor all four holes. Please note that it's the customer responsibility to meet any seismic requirements if applicable.
Figure 5: Anchoring the station to the concrete
slab.
SUCTION PIPING
Suction piping is perhaps the most sensitive and demanding element of the pump station installation. Proper suction piping can make the difference between the pump station operating properly or not working at all. The following rules should be observed in the installation of every suction assembly:
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A. Piping should be sized in accordance with
the architect, engineer or factory's direction.
B. Piping should be constructed of spring
reinforced suction hose, steel or high density poly pipe. All joints should be fusion welded or flanged and pressure tested to ensure a leak proof connection. Threaded fittings should be installed with ample Teflon pipe joint compound and pressure tested with air using a soap solution to check for leaks. PVC pipe with glued or gasketed fittings should never be used.
C. Piping should be well-supported in order
to eliminate piping strain on the inlet of the station. Piping strain can be tested simply by disconnecting the piping connection closest to the station inlet after the suction assembly is complete. If the disconnected piping shows signs of misalignment and requires force to reconnect, the pump is experiencing piping strain. Correct this condition by changing the existing supports or by adding more supports until the suction piping connects to the pump inlet with no misalignment.
D. All piping reducers should be eccentric
with the flat portion of the reducer positioned on top. Isolation valves should not be installed in pump suction piping. Use a minimum number of elbows (preferably no more than two) in any suction pipe. These elbows should be 45­degrees, if possible. A 90-degree elbow may be used if positioned properly. The elbow closest to the pump inlet should have a section of straight pipe at least six pipe diameters long between the elbow
and the pump inlet (Example: 4" pipe requires 4" x 6 = 24" long piece of straight pipe between the elbow and the pump inlet).
E. Pump stations that lift water from a lake or
pond must be installed with a foot (check) valve at the end of the suction pipe. The valve should never be installed above ground and should always be equipped with a properly sized intake screen. The foot valve shall be constructed of aluminum and shall contain a rubber flapper which sets on a machined aluminum surface to provide a tight seal. Ample space shall be provided for the flapper to fold back out of the liquid stream, keeping friction loss to a minimum.
F. The foot valve should be positioned at
least 4 pipe diameters below the lowest possible water level and never lay on the bottom where silt and sand could be sucked into the pump. It should always be mounted in a vertical position.
Note: Never mount a foot valve at an angle other than vertical since the valve may experience difficulty in closing securely.
Locate and protect the suction intake from algae or other floating material with a cleanable screen or a diversion structure.
Note: Please consult the factory if the pump is to take its suction from a stream or river that might experience suspended silt, sand or other abrasive materials. Special filters or intake structures may be necessary to protect the pump from premature wear and failure. The presence of any abrasive materials will void the factory warranty.
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Figure 6: Proper suction lift principles
Figure 7: Improper suction lift application
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DISCHARGE PIPING
Like the suction assembly, the discharge piping requires adherence to certain rules and conditions in order to minimize future problems. The following list should be observed when designing and installing the discharge assembly:
A. Discharge pipe should be constructed of
screwed or welded steel pipe.
B. The piping should be constructed in a Z"
configuration with 45 or 90-degree elbows. The elbow located underground must be protected against movement by a concrete thrust block. The concrete form should be positioned on the station side of the elbow so that pipe movement is prohibited in that direction. At least ½ yard of concrete should encase this elbow and extend to the virgin soil surrounding the elbow and pipe. Please note: piping must be supported properly prior to pouring the concrete thrust block in order to ensure piping strain is not present at the pump discharge. Piping train on the discharge of the pumps station can be checked in the same manner as the suction piping strain described earlier.
C. Connecting the steel pipe to PVC mainline
should be accomplished with a gasketed transition coupling. Solid connections, such as flanges or screwed fittings, should be avoided. Transition couplings are available at most irrigation supply houses.
Figure 8: Proper installation of pump
station discharge.
ELECTRICAL CONNECTIONS
The pumping system is pre-wired at the factory and includes all internal wiring necessary to function. For relay start systems, the customer must still wire any external controllers and devices to the relays inside the control panel. The only electrical connection required in the field is the main disconnect located in the station control panel. Electrical cables from the power company's meter or distribution panel are to be connected to the top lugs of this main disconnect panel.
DANGER
Electrical wiring poses the danger of hazardous voltage. Contact with live electrical connections can cause shock, burns or even DEATH. All electrical connections should be made by a qualified and licensed electrician and then inspected by local code compliance authorities.
All electrical connections in the control and disconnect panels are tightened prior to the pumping system leaving the factory. However, these connections can become loose during transit and must be checked before energizing the pump station. Your electrician should be requested to perform this task and should be directed to tighten all high and low voltage connections, terminal strips and power lugs.
It is important to ground the station properly as required by code. The electrician installing the incoming power cables should also provide this ground connection inside the main disconnect panel.
CAUTION
In order to ensure the proper operation of the station's electrical surge control devices it is important to install proper grounding close to the station.
The power company's grounding alone may not be sufficient and additional ground rods may be needed to ensure adequate protection. The quality of this ground should be checked by a factory certified technician or electrician and should not exceed 20 ohms resistance.
13
START-UP AND ADJUSTMENTS
Floboy Pumping Systems are pre-tested in the factory and all controls are adjusted for the operating conditions specified. However, there are certain checks that must be performed prior to energizing the pump station in order to prevent the possibility of component damage. These voltage checks can be performed by a qualified, licensed electrician.
The required checks, procedures and adjustments are as follows:
POWER CHECK
DANGER
Electrical wiring poses the danger of hazardous voltage. Contact with live electrical connections can cause shock, burns or even DEATH. All electrical connections should be made by a qualified and licensed electrician and then inspected by local code compliance authorities.
Have a licensed electrician check incoming voltage to make certain it is in the range specified and its variance and imbalance are within acceptable limits. The pump's motor, starter and wiring are sized for a particular nominal voltage; either 120, 208, 240 or 480 volts. Voltage is checked with a calibrated volt meter. On a three­phase system (power is supplied with three or four wires) there will be three fuses in the main disconnect panel, A, B and C. It is important that your electrician or technician check the voltage between each fuse pair, i.e. A to B, B to C and A to C. These voltage readings should be analyzed in accordance with the following formulas:
VOLTAGE VARIANCE
1. Average the three voltage readings
2. Subtract the nominal voltage from this average
3. Divide the difference by the nominal voltage to arrive at a percent variance
4. The maximum acceptable level for voltage variance is 5%
EXAMPLE:
Assume the actual voltage readings on a nominal 480 volt system are:
A-B = 485 volts, B-C = 492 volts, and A-C = 472 volts
The average voltage is (485+492+472)/3 = 483 volts
The percent voltage variance is (483-480)/480 =.00625 or.625%
VOLTAGE IMBALANCE
1. Average the three voltage readings
2. Find the reading which has the widest deviation by subtracting the average from each reading
3. Choose the largest difference and divide it by the average voltage to arrive at a percent imbalance
4. The maximum acceptable level for voltage imbalance is 2%
EXAMPLE:
Assume the voltage readings described above are:
A-B = 485 volts, B-C = 492 volts, and A-C = 472 volts
The average voltage is (485+492+472)/3 = 483 volts
The largest difference is (A/B - Avg.) 485-483 = 2 volts
(B/C - Avg.) 492-483 = 9 volts
(A/C - Avg.) 483-472 = 11 volts
The percent voltage imbalance is: 11/483 =.0228 or 2.28%
In this particular example the voltage variance is acceptable while the voltage imbalance is not. If your calculations show either result to be beyond the acceptable limits noted, you should contact your power company and have the power corrected. Failure to do so could result in motor current imbalance and excessive heat which reduces the motor's lifetime.
PUMP PRIMING
As noted earlier, priming the pump is the process of filling the pump's volute case and suction piping in order to facilitate the pump's ability to move
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water when the motor is energized. For pump stations whose inlet is supplied with water under pressure or from an elevated reservoir, the priming process is not required other than the removal of trapped air in the suction pipe. A petcock on the top of the pump volute should be opened to allow air to escape and the volute to fill with water. Once the air has completely escaped, close the petcock.
If the pump station sits above its water source such that a foot valve is required, the pump will require priming. Remove the cap from the 3/4" pipe at the station inlet and fill the suction pipe using a garden hose or bucket. When the pipe overflows and water is maintained at the top of the fill pipe for several minutes, the pipe cap can be re-installed and tightened. You may have to repeat this filling process two or more times if air is trapped anywhere in the suction piping. The presence of air will cause the pump to instantly lose pressure once the discharge valve is opened.
PUMP ROTATION
CAUTION
Caution: Always ensure that the pump is primed prior to checking rotation. Failure to do so can damage the mechanical seal located in the motor end of the volute case. These seals are very sensitive and can be destroyed if allowed to run dry, even for a very brief period of time.
It is important to note that the pump is designed to rotate in a given direction. On most pumps the proper direction of rotation is noted by an arrow cast or painted on the exterior of the volute casing. In the absence of this arrow, one can determine the proper direction of rotation by observing the pump from the motor end. Rotation should always be in a clockwise direction when viewing the pump from this vantage point. Pump rotation can be checked by momentarily energizing the motor and observing the shaft between the motor and the pump.
Three-phase motors can rotate in either direction. Checking pump rotation by briefly energizing each motor is accomplished with a two position switch labeled "Off/On". The switch is located on the control panel door and it determines the pump's mode of operation. The procedure for performing this check is to first turn the main disconnect on the outside of the station enclosure to the "On" position. Next, press the manual button on the front of the controller, then turn the "Off/On" switch
from "Off" to "On". For the VFD Pump, the motor speed may need to be increased to approximately 10-20% before the motor will turn. Once motor rotation has been determined, turn the switch back to "Off". Reverse rotation of centrifugal pumps is not damaging but performance and efficiency are poor and long periods of operation will cause overheating. Running the pump for a minute or two to determine rotation will not harm the pump.
PM Pump rotation may be more difficult to determine. Most PM Pump models motor-pump coupling is not visible, so a performance check is required to determine proper rotation. With the pump primed and the station isolation valve closed and the controller in “Manual”, turn on the PM Pump switch (Must be cycled off-then-on if the switch is on when the change to manual is made). Note the system pressure. The pump should have no trouble generating set point pressure in the discharge manifold. If pressure does not increase when the pump is started, first verify that the PM Pump isolation valves are open, that the station discharge isolation valve is closed, and the petcock on the discharge pressure gage is open. If the pump still fails to produce, verify the PM Pump discharge pressure reducing valve is not adjusted all the way out. (If set point pressure is to be higher than the factory setting, this valve may need to be reset). If the pump still fails to produce, change rotation of the pump and retest.
WARNING
Caution: Make certain the power is turned off at the main disconnect switch prior to changing any electrical leads.
If the rotation is wrong, it can be corrected by reversing any two leads on the bottom of the motor starter or VFD (example: move wire A to the B location and wire B to the A location). Single phase motors will require internal rewiring which is best performed by a Flownet technician, and is normally only required after motor replacement.
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Figure 9: Confirm rotation by making sure motor is operating in the direction of the motor tag
SYSTEM PRESSURIZATION
With the system isolation valve on the discharge of the pump station almost fully closed, turn the Off/On switch to the "On" position. When the pump starts, you should notice an immediate increase in pressure on the manifold pressure gauge. If the pressure does not rise to at least the operating pressure of the system, turn the Off/On switch to "Off" and repeat the priming process described earlier. Otherwise refer to the "Troubleshooting" section of this manual or contact the factory for assistance.
CAUTION
If you open the system isolation valve too quickly, the pump may instantly lose prime and will require repeating the priming process.
Leave the station isolation valve in a slightly cracked state until you are certain water is flowing into the discharge piping. On irrigation systems it is a good idea to open several sprinklers at the remote end of the system. When water begins to emerge from these heads the system is reasonably full and the pump station isolation valve can be gradually opened to its full position.
When starting a centrifugal pump for the first time it is a good practice to stay close to the pump for the first few minutes of operation. If you notice conditions such as smoke from the motor, unusual odor, loud noises, etc., turn the pump off immediately and consult the factory. In some cases the pump may sound like it is pumping marbles or rocks. This noise may be the sign of mechanical problems or it may be a hydraulic phenomenon known as cavitation occurring inside
pump. Cavitation is a condition that may permanently damage the pump if allowed to continue. It is usually caused by improper suction installation or by over demanding the pump. It is not uncommon to experience cavitation when filling the discharge piping since empty piping encourages pump over demand if the station isolation valve is opened too far or too quickly. Should you notice this sound, gradually close the isolation valve until the noise intensity subsides. Once the system approaches full design pressure, the cavitation noise should disappear. If throttling the system isolation valve makes no difference in the noise intensity, turn the pump off and consult the factory.
PRIMING LINE ADJUSTMENT
On pumping systems requiring a foot valve in the suction, a priming line valve is used to apply a seating pressure to the suction pipe when the pump is not operational. This valve is set for 30 psi but can be adjusted if so desired. Turn the valve adjustment screw clockwise to increase pressure and counterclockwise to decrease.
OVERLOAD TRIP ADJUSTMENT
Every motor starter assembly uses an electronic sensor that monitors the motor current. If the current exceeds a safe limit, considered to be a point where the motor is overloaded, the sensor shuts the motor off. The current limit is factory preset but can be adjusted as noted by the calibrated scale along side the adjustment screw.
CAUTION
This adjustment should be made by a qualified technician only. Improper adjustment of this setting can jeopardize motor lifetime and affect system warranty.
The overload should never be adjusted above the motor's full load rating. This rating is stamped on a motor identification tag fixed to the motor housing. Make certain the motor full load current rating corresponds to the correct operating voltage since multiple voltages and their corresponding current ratings may be noted on the same tag.
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STATION OPERATION
This section covers the sequence of operation for your station including: Door Switch Operation, Automatic Operation, and System Safeties.
DOOR SWITCH OPERATION
Individual Pump Switches
Allows operator to select which pumps operate:
NOTE: Pumps have an OFF/ON switch.
OFF Selected pump does not operate,
regardless of any other switch position.
ON Selected pump will operate, provided the system switch is set to AUTO or MANUAL
OPERATIONAL SETTINGS IN THE HMI
Note: HMI Stands for “Human Machine Interface”
Auto-Manual Select
The Auto-manual Control (circled) resides on the default screen.
Press the center arrow to move between auto and manual mode. Pump must be switched off, then on when changing mode to manual or pump will not start.
LDP Override
This position prevents a low-discharge pressure fault from shutting down the pump station. Use the LPD OVERRIDE “Y” position during the initial pipe filling and when restarting the system from a de­pressurized condition in MANUAL or AUTO mode. Access is gained to this item by pressing the “Manu” button, accessing the menu then selecting “Safeties”.
Reset Control (F5)
This control allows the operator to clear (Reset) any faults within the system once the cause of the fault has been cleared.
The safety in effect will be shown in the lower “Status” portion of the screen. You will also be instructed to press F5 to reset the fault.
Resetting Faults
Faults must be reset by the reset control. Pressing the reset control clears all fault counters. If the fault lamp/message does not go out after resetting, the cause of the fault is still present and must be resolved before normal operation can continue.
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AUTOMATIC OPERATION
Overview
The primary benefit of Variable Speed Pumping (VSP) Systems is to ensure surge-free starts and stops while maintaining a constant down-stream line pressure with no mechanical pressure­regulating valve. This minimizes pipeline failures due to surges and, not incidentally, reduces the utility bill for the station.
Automatic operation is selected by manual-Auto control on the HMI. In automatic operation, all pump activity is determined by the controller. The position of the individual pump switch lets the controller know whether or not it is available to run. In most cases, all pump switches are in the ON position. When a pump or a motor is removed from the system, turn the pump switch OFF, and the controller will not try to run that pump.
The controller brings one pump on at a time in order to satisfy the start criteria (usually set point pressure). Some stations are designed to start and stop the pumps based on remote start signals or flow. The standard start and stop sequence is as follows:
Pressure below set point to start Combo 1
-3 PSI Delay time to start Combo 1
0 SEC
Pressure above set point to stop Combo 1
5 PSI Delay time to stop Combo 1
5 SEC
Pressure below set point to start Combo 2
-5 PSI Delay time to start Combo 2
3 SEC
System Charging Mode
If there are no heads open, and the pressure is within the defined range of operation, pressure may slowly drop due to system leakage, or other small demands. A PM pump option is available to address this issue. Not all stations include a PM pump. System is configured as follows:
System Mode: AUTO
All Individual Pumps switches: ON
LP Override Setting: Off (Low Discharge Pressure fault enabled)
NOTE: As downstream pressure drops to more than 5 PSI below set point, the PM pump starts up. It runs until the system pressure builds up to 5 PSI above set point, and then shuts off.
Two issues can come into play here. One is cycle time. This refers to the number of times an hour that the PM pump starts and stops (one cycle). If the amount of cycles is excessive, either the system leaks have to be repaired, or the start/stop parameters need to be tuned (normally by dropping the pressure below set point to start or increasing the pressure above set point to stop).
WARNING: Excessive Run Time Hazard
Excessive stop times, or stop pressure setting can cause system over-pressurization, pipe damage, and potentially cause personal injury. Consult your service technician or the factory if you are unsure about any settings.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
NORMAL OPERATION
Normal Operation occurs when heads are turned on, or a demand for water exists. System is configured as follows:
System control switch: AUTO
PM Pump switch: ON
Pump 1 switch: ON
LP Override setting: “N” (Low Discharge Pressure fault enabled)
When the pressure drops 5 PSI below set point, the PM pump starts and continues to run until the pressure is 5 PSI above the set point. When this pressure is reached, the PM pump turns OFF. If the pressure continues to drop to 10 PSI below set point, the VSP starts and the PM pump turns OFF. This is the operation sequence for Combo 1.
When the VSP starts, the startup ramp in the program lowers the set point to 2 PSI above the actual line pressure. The VFD adjusts the speed of the VSP to maintain the discharge or downstream
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pressure at the set point. This is the operation sequence for Combo 2.
When the flow decreases, the VFD slows down to maintain a constant discharge pressure. Eventually as the speed decreases, a set point is reached where the VSP is not pumping any water. Because the VFD speed keeps dropping as the flow decreases, the discharge pressure would never get above the set point. In this situation, the VSP would "idle," pump no water, and would never turn off. To shut down the VSP, the system initiates the "Speed Test" whenever the flow is below a predetermined value for 15 seconds. The program then lowers the set point by 5 PSI. If the VFD speed falls below a predetermined value and the pressure remains above the reduced set point for 15 seconds, the VSP turns OFF.
MANUAL VFD OPERATION
Overview
Manual operation is selected by the system mode control on the HMI. In manual operation, all pump activity is controlled by the individual pump switches. The speed of the VFD pump is controlled by the speed slider on the main screen. The PM Pump will run in XL mode (at full speed). The LP Override setting enables or disables the low-discharge pressure fault.
NOTE: Manual operation is rarely used. However, it does allow for operation of individual pumps for testing purposes.
Sequence of Operation (performed in order)
All Individual Pump switches: OFF
Low Pressure Override setting: “Y” LDP Override (Low Discharge Pressure fault disabled). If initial system pressure is high enough, disable Low Pressure Override (Set to “N”).
System control mode: MANUAL
Pump 1 switch: ON
Speed Potentiometer: Press up-arrow to increase speed, or press “Set” to allow entry of speed directly (in %). Adjust as required for flow rate / pressure required.
NOTE: When done, turn OFF all pump switches and place system control switch in OFF. Return LP Override setting to N. If the station can be run in Automatic mode, return the system to AUTO and turn ON all pump switches.
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CONTROLLER BYPASS OPERATION
Overview
This is an abnormal operating mode and would be used if the controller was not operable and there is need to irrigate.
WARNING: Controller Bypass Hazard
This mode of operation should be used as a last resort. Constant operator monitoring is REQUIRED when this mode is used. No safeties function in controller bypass, and damage to your piping or property could occur.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
System Operation (performed in order)
All Individual Pump switches: OFF
Using the VFD keypad located below the pump switches on the door, Set the following parameters:
1102 - EXT2 (7)
3018 - Not Sel (0)
4011 - Verify set point
4023 - Verify Min Speed
Pump 1 switch: ON
Verify operation before leaving unattended.
SYSTEM SAFETIES
Overview
The program in the PLC protects the system by shutting down in either of the “Auto” or “Manual” Modes of operation if it detects any of the following problems:
Fault Reset
All faults are cleared by pressing the Reset control (F5) on the HMI, or by re-arming individual pump faults by turning the individual pump switch to the OFF position, and then back ON.
Table 1: Safeties
Low Discharge Pressure
The pressure transducer located in your station discharge line communicates the downstream pressure to the controller. The controller monitors downstream pressure to determine if the pressure is below the allowable range.
The standard program defines low-discharge pressure as being 80% of set point pressure. This setting is in gage pressure, not in reference to set point. There is a time delay of 300 seconds (adjustable) before the station faults that is designed to give the system time to build pressure beyond this point. The values might vary on your station.
If the discharge pressure remains below the Low Pressure set point for longer than 60 seconds, all pumps are shut down. The red station fault light on the station comes on, and the display indicates that a "Low Discharge Pressure Safety" has occurred.
This fault does not automatically reset. To clear the fault, press the Reset control on the HMI.
If the pump station is simply unable to keep up with the demand, shut the station down, and determine the nature of the problem. Consult the Troubleshooting section of this manual for assistance.
High Discharge Pressure
As with the "Low Discharge Pressure" fault, the controller monitors downstream pressure to determine if the pressure is out of range, or above the allowable limit.
The standard controller program defines high­discharge pressure as being 15 PSI above set point pressure (set in gage pressure without
Alarm or Fault
Low Discharge Pressure
High Discharge Pressure
Low Inlet Pressure (Optional)
Loss of Prime (Optional)
Low Level (Optional)
Individual Pump Faults
VFD Fault
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reference to set point). There is a time delay of 60 seconds, before the station faults that is designed to give the system time to adjust the pressure to below this point. These values might vary on your station.
Based on the values above, if the discharge pressure remains 15 PSI above the set point for longer than one minute, the station shuts down. The red station fault light on the station comes on, and the display indicates a “high pressure Safety”.
NOTE: At this point, shut the station down, and determine what the problem is. Consult the Troubleshooting section of this manual for assistance.
To clear the fault, press the Reset control (F5).
Low Inlet Pressure
This optional safety is usually used on flooded­suction booster pump applications.
Normally, a pressure switch monitors the inlet pressure on the "suction" side of the pump. This switch is located in a box on the lower left side of the control cabinet. The switch is used in conjunction with a relay to inform the controller that it is unsafe to run. Setting the low inlet pressure condition is accomplished by physically adjusting the pressure switch. There is a 20 second time delay in the PLC.
Once the inlet pressure drops below the switch pressure setting, all pumps shut down after a 20 second (adjustable) delay. The red station fault light comes on, and the display indicates a "Low inlet Pressure Safety”.
WARNING: Low Inlet Pressure – Station Shutdown Hazard
At this point, shut the station down, and determine what the problem is. Consult the Troubleshooting section of this manual for assistance.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
There are two dials on the pressure switch. The one on the top is the correct one to adjust. Turn clockwise to increase the pressure set point, counter-clockwise to decrease.
CAUTION: Delta Pressure Setting Hazard
Do not adjust the bottom dial. This is a delta pressure setting, and is not used. This dial must be adjusted fully counter-clockwise (0 position). If you are having trouble with your pressure switch, always verify that this dial is in the 0 (fully counter-clockwise position) before adjusting the top dial.
Failure to follow these instructions indicates a potentially hazardous situation, which, if not avoided, may result in property damage.
CAUTION: Minimum Pressure Setting Hazard
The pressure setting is based on the minimum inlet pressure that the pump can safely operate. Do not lower the pressure switch setting without consulting the factory.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
Loss of Prime
This optional safety is usually used on end-suction centrifugal pump applications.
A level probe is placed in the suction piping at a predetermined level. This probe works in conjunction with a relay to inform the controller that it is unsafe to run. Fault usually signifies a malfunctioning foot valve.
After a few seconds, all pumps shut down. The red station fault light comes on, and the display indicates a "Loss of Prime fault"
NOTE: At this point, shut the station down, and determine what the problem is. Consult the Troubleshooting section of this manual for assistance.
To clear the fault, press the Reset button.
CAUTION: Equipment Damage Hazard
Do not attempt to bypass this safety, as pump damage will occur.
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INDIVIDUAL PUMP FAULTS
Pump faults are usually caused by the thermal overload tripping, or circuit fault that causes the pump NOT to start when requested.
Overload Protection
Overload Protection is standard on all pump stations. The overload is a safety device that shuts the motor down when amperage exceeds the set point of the device.
If the motor amperage exceeds the overload set point that pump shuts down after a time delay. This delay time is inversely proportional to the overload amount. In some instances, an individual pump can trip without shutting down the entire system if another pump is available to operate. If so, the controller will automatically bring the available pump on line. The controller will indicate a fault for the specific pump.
WARNING: Overload Hazard
The overloads are located inside the control panel. All safety procedures must be adhered to during the any adjustment or resetting process. Improper procedures or failure to use proper safety procedures could result in death or serious injury.
Resetting the overload is accomplished by pushing in the blue Differential Overloads button on the right front face of the device, and rotating it approximately an eighth of a turn clockwise (applies only to PM Pump).
Adjustment of the overload set point is performed using the blue dial on the left front face of the device.
Once the overload has been reset, individual pump faults require turning the individual pump switch to the OFF position, and then back ON (re­arming).
High Pump Temperature (Optional)
High pump temperature utilizes a temperature probe inserted into the pump discharge piping. The probe trips when the water temperature reaches 120°F, and then immediately shuts down the pump. “PM Pump High Temp” or “Pump 1 High Temp” will show on the HMI.
The temperature probe automatically resets at 105°F. At that time, the pump can be re-armed, and pump operation can continue.
NOTE: If the pump continues to shut down for this issue, shut the station down and determine what the problem is. Consult the Troubleshooting section of this manual for assistance.
VFD Fault
The VFD sends a fault signal directly to the controller. The display shows, "VFD Fault" and the red station fault light comes on. To determine the nature of the problem, you must use the VFD keypad display and review the fault/alarm history. This procedure is outlined in the VFD section of this manual. A list of all inverter fault/alarm codes is found in your VFD manual.
Once you have determined what the VFD (inverter) fault is, and have cleared it, press the station Reset button to clear the alarm shutdown status.
NAVIGATING THE CONTROLS
OVERVIEW
The Floboy controller is a combined touch-screen interface (HMI) and controller. The device communicates with the VFD for pressure and flow readings, inputs (pump switches, safety switches, etc), and outputs (Fault light, PM Pump contactor, etc).
All control decisions are made in the controller, including PID control, pump start/stop decisions and safeties. Settings for these decision processes are available in the controller. There are 6 keys to the right of the controller screen.
These are quick access keys that quickly allow access to menus and are also provided special functions in some screens. F5 is the “Reset Control” and is used to reset system safeties.
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Figure 10: Floboy controller.
The “Menu” key provides access to the slide-out menu which can be touched directly for navigation and also serves as a reminder of the function keys definition in the context of the current screen.
The main screen shows pressure, flow, set point pressure, VFD speed, pumps status, fault status and provides access to the “Manual” and “Automatic” mode selection.
Figure 11: Main Screen
The Flow window will show either a flow rate, if an optional flow meter was purchased with the system, or a flow indication, indicating “No” for no flow, and “Yes” for flow> 0.5 ft/sec.
The lower left corner of the screen will display fault information and other status indications.
PUMP STATUS INDICATORS show the status of
each pump.
Figure 12: Pump Status Indicators
PRESSURE SET POINT ADJUSTMENT
CAUTION: Equipment Damage Hazard
Be careful not to set the value too low for the pump you are using, nuisance overloads can occur. Also, do not set the value too high for your systems piping or damage may occur.
Touch the numeric value for the set point:
Figure 13: Pressure Set Point
The password screen for set point will come up.
Figure 14: Set Point Password Entry Screen
Touch the button next to the password value. Enter “1234” for password and press enter.
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Figure 15: Entering the password for the set point
screen
This allows the user to edit the set point. Touch the button next to the Set point value:
Figure 16: Changing the set point
Change the set point as required. Be careful not to set the value too low for the pump you are using, nuisance overloads can occur. Also, do not set the value too high for your systems piping or damage may occur.
TRENDS AND ALARMS
Press the Graph button to access the history/performance graph. Scroll to access historical data up to 2.3 days of data for pressure, Flow, Set point and VFD Speed.
Figure 17: Performance Graph
Press the Alarm button to view up to 32 previous alarms.
Figure 18: Alarms Screen
Alarms are shown as shown in figure 15 below.
Figure 19: Alarm Description
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Pressing the Menu button from the main screen provides access to the menu system.
Figure 20: Menu
Access to the main functions of the controller is available from the menus.
Figure 21: Totals
TOTALS: provides access to the Flow totals
(optional flow meter required) and pump hour meters.
Figure 22: Pump Control
PUMP CONTROL: Allows access to pump start/stop
parameters for station tuning.
START SETTINGS. Select combo and parameters
to set via buttons at top of screen. Pressure is in reference to set point. Flow rate is used for Flow Start systems.
Figure 23: Stop Settings
STOP SETTINGS: Pressure is in reference to set
point, flow rate is used when flow stop is required/configured.
Figure 24: Pump Control, Combo Selection
F3 allows user to change the combo being adjusted. Note the combo number being adjusted is shown in the black box on the right-hand side of the screen.
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Figure 25: Speed Test
SPEED TEST: Delay is how long the controller
waits before initiating speed test (after all other shutdown parameters are satisfied). Step delay controls how quickly the VFD speed is reduced, to detect 0 flow. If VFD speed reaches minimum speed (set under PID, shown later), then the controller will shut down the pump. Step size is the % speed decrease for each step. To “smooth out” speed test, set Step delay lower and step size lower. To quicken speed test, set step delay higher and/or step size higher.
SAFETY:
Figure 26: Safety
The safety functions are controlled in this screen. Delay controls how long the safety will take to time out. Set point for Low Pressure and high pressure are in gage values and not in reference to set point. Low Pressure override is also found in the safety menu.
Figure 27: Safety, Others
Inlet water faults are controlled under “Others”. Short times should be used as these faults can cause serious damage if the timers are set too long. 5 seconds is all that is required. High Pump Temp is also controlled here. The delay is how long between a high pump temp signal and the pump is shut down. 5 seconds is all that is required. The Hold off time controls how long the pump must run before the HPT is honored. This prevents exposed inlet piping from causing a HPT safety on startup due to solar heating of the water in the pipe.
Figure 28: Panel Configuration
PANEL CONFIG: Used to set screen contrast and
time/date in the controller.
SYS CONFIG (Password required, technician
access only):
PID PARAMETERS, pump configuration and other
factory/technician access parameters are configured here.
OTHER SETTINGS (Password required, technician
access only): Safeties and other control features are controlled here.
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MAINTENANCE
Maintenance is an investment that will pay dividends in the form of improved reliability and durability. Site maintenance checks are a matter of day to day, week to week care that is important to the proper operation of the pumping equipment. Periodic equipment checks will ensure that the recommended lubricants, fluids and service parts are available and planned for. Flowtronex recommends Preventative Maintenance be performed quarterly.
DANGER: Personal Injury Hazard
Performing maintenance work on your pump station can be dangerous. You face the risk of electrical shock or related injuries, and must be trained in the danger of electricity. If you have any doubt, have a qualified technician do the work. Contact the factory for the closest authorized Flownet service office to you.
Failure to follow these instructions will result in death or serious injury.
REGULAR MONTHLY MAINTENANCE INTERVALS
Heat exchanger:
Verify that the flow through the heat exchanger is a solid streamline out of the exhaust line into the wet well. Too little flow reduces cooling capacity. Too much flow can waste water and reduce the life of the core. 2 gpm is all that is required.
Control panel:
Using the operator interface, verify that all the buttons operate properly. Also review the station operation, fault history, and data log for station operation.
Verify that all surge devices are visually sound. Check the surge device for the station (mounted on the back of the control panel). Black soot on or around the device indicates that it has taken a surge and needs to be replaced.
Motor lubrication:
If you have a grease filled bearing, ensure that grease is not all over the inside of the motor and down in the bottom of the motor. This could be a sign of over-filling. Refer to the motor manufacturer's lubrication instructions.
Pumps - horizontal:
For a horizontal pump, verify that the mechanical seal is not leaking between the pump and the motor.
Sound and visual checks of whole station:
Just listen. Do you hear any odd sounds rubbing or grinding or maybe even electrical arcing or that something is in a bind? This can indicate a serious problem.
There is going to be some harmonic vibration with the pumps and motor. We are looking for excessive vibration or noise. Can you see a bend in the pump shaft? Do the motor and shaft shake violently? This needs servicing immediately. Do not operate pump if vibration is excessive.
Confirm that the building cooling and ventilation systems are operating and clear of all obstructions. Maximum operating range for equipment is 40°C (104°F). Verify that water, grease, oil, hardware, etc. are not leaking or loose on the pump station.
Station skid:
Visually inspect for leaks in the station piping, valves, and other components.
Visually inspect the piping and skid for any stress cracks in the welds.
Visually inspect the station for loose or damaged paint or areas of rust.
DANGER: Personal Injury Hazard
Pump station maintenance must be performed by properly trained and qualified personnel. Hazards exist for electrocution, shock, rotating components, and pressurized components.
Failure to follow these instructions will result in death or serious injury.
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WINTERIZING THE PUMP STATION
CAUTION: Equipment Damage Hazard
Your pumping system must be properly winterized before storage. Failure to winterize the system could result in damage to the pipes, valves, pumps, or other components.
Failure to follow these instructions indicates a potentially hazardous situation, which, if not avoided, may result in property damage.
Winterizing
1. Turn all enclosure switches to the OFF position.
2. Open (turn off) all electrical disconnects to the pump station.
DANGER: Personal Injury Hazard
The pumping system must be disconnected from the main power supply before attempting any operation or maintenance on the electrical or mechanical parts of the system.
Failure to follow these instructions will result in death or serious injury.
3. Close all the station discharge isolation valves.
4. Close the pump station inlet isolation valves.
5. Close all auxiliary equipment isolation valves (if applicable).
6. Remove all connections from the heat exchanger inlet and discharge. Force water from the heat exchanger core with compressed air.
WARNING: Pump Pressure Hazard
Pumping system must be isolated from the system and pressure released before disassembly of any piping, valves, or pumps.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
CAUTION: Compressed Air Hazard
Proceed with caution when working with compressed air.
Failure to follow these instructions could result in serious personal injury, death, and/or property damage.
7. Connect hose to hose bib on the pump station. The bib is usually found under the discharge manifold for the pumps, or at the end of the hydro-pneumatic tank. Slowly, open the hose bib ball valve on the pump station. Slowly, open all ball valves on the pump station. Wait until pump station pressure reads 0 PSI before closing the hose bib ball valve.
8. Slowly, bleed pressure from the inlet manifold using the ball valve or the hose bib on the isolation ball valve on the pressure gauge. Carefully, remove plug from the inlet manifold and drain. NOTE: Do this only if an inlet isolation valve is installed and closed.
WARNING: Pump Pressure Hazard
Pumping system must be isolated from the system and pressure released before disassembly of any piping, valves, or pumps.
Failure to follow these instructions could result in serious personal injury or death, or property damage.
9. If there is not an inlet isolation valve then and you cannot drain the inlet line, close all pump inlet isolation valves.
10. Remove the lowest plug on the pump volute or open the pit cock valve to drain all pumps completely.
11. Carefully, drain all filters and their components, including the flush lines.
Spring Restart
Prior to restarting the pump station in the spring:
1. Make certain that all tubing is replaced; all connections are tightened; and check that all the drain valves are closed.
2. Open all operating valves and verify that the bonnet is tight.
3. Check that the drain plugs are installed in pumps and piping.
NOTE: Contact Xylem Flowtronex PSI, if you have further questions on winterizing your pump station.
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TROUBLESHOOTING
1. If a troubleshooting step needs to be performed by a qualified person, it is labeled “To be performed by a qualified person only.
2. Steps that can be performed by unqualified persons are not labeled.
3. Qualified persons are those who have been trained in avoiding the electrical hazards of working on or near exposed energized parts. Only qualified persons may open the electrical enclosure.
4. Unqualified persons are those with little or no such training.
LOW DISCHARGE PRESSURE FAULT
Cause
Cure
Flow rate greater than station capacity or unable to pressurize the system in refill mode (too many sprinklers on).
Adjust the irrigation demand as required.
Verify the pressure set point. Has this value been changed from the original design? If the set point has been increased, the available flow will be lower. Check the pump curve to verify the pump performance.
A large break in the irrigation piping.
Repair the piping.
Low system pressure setting is too high.
Access “Menu->Safety->Low pressure: Set Point. This is a gage pressure setting, not relative to set point.
Low system pressure safety time is too short.
Access “Menu->Safety->Low pressure: Delay. Be careful not to set this too high. 300 sec is normally the maximum, 60 seconds the minimum.
System pressure transducer sensing line is valved off or clogged.
Check the ball valve position, and/or blow out line. System pressure transducer failure.
Replace the pressure transducer (Flownet).
All pumps not running.
One of main pump switches in OFF position.
Consult the motor troubleshooting section if the motor won’t start (see Motor Won't Start).
Main pump discharge isolation valve is closed.
Open the valve.
Pump discharge check valve leaks.
Check for foreign objects holding the valve open. Replace the check valve if it is damaged.
DSR or PRV is partially or fully open.
The pilot valve is set too low. Adjust as necessary.
The needle valve on speed control is screwed in (closed) too far. Adjust as necessary.
There is air inside the relief valve cover. Bleed air off the valve top.
The ball valve(s) at the inlet and/or cover tapping(s) are closed. Open the valves.
The optional strainer at the relief valve inlet tapping is clogged. Disassemble and clean.
There is an obstruction under the relief valve or pilot valve seat. Disassemble and clean.
There is a leak in the relief valve diaphragm. Replace the diaphragm.
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Bad relief valve or pilot valve seat. Rebuild or replace valve.
Low suction pressure or supply water restriction.
Call the city if the city water pressure is lower than the normal or published value. Check the supply piping for obstruction.
HIGH DISCHARGE PRESSURE FAULT
Cause
Cure
High system pressure setting too low.
Access “Menu->Safety->Low pressure: Set Point. Verify is approx. 15 psi higher than set point. This is a gage pressure setting, not relative to set point.
High system pressure time too short.
Access “Menu->Safety->Low pressure: Set Point. Normal setting is 60 seconds. Do not extend too far or piping damage may occur.
System pressure transducer failure.
Compare display readout to the pressure gauge. Replace transducer (Flownet).
Isolation valve for DSR or main discharge is closed.
Open the valve.
DSR will not open fully.
The pilot valve is set too low. Adjust as necessary, 15 PSI over set pressure.
The needle valve on the DSR is too far open; adjust as necessary.
The ball valve(s) at the inlet and/or cover tapping(s) closed. Open the valves.
The indicating stem is bent and/or sticking.
Irrigation demand is reducing too quickly.
Reprogram irrigation to stage down in steps.
LOW LEVEL FAULT
Cause
Cure
Clogged or shut off supply pipe.
Check the supply pipe for restrictions or closed valve. Clogged inlet screen.
Check and clean the inlet screen.
Problem with level probes.
Inspect probes for correct insertion depth.
Look for dirty or corroded probes.
To be performed by a qualified person only.
Look for broken probes, probe holder, or wires.
To be performed by a qualified person only.
Check for loose or incorrect probe wiring.
To be performed by a qualified person only.
Verify ground continuity between the station and wet well.
Level relay failure (inside control panel).
To be performed by a qualified person only.
Check relay for proper operation. Replace as required.
LOW INLET PRESSURE FAULT
Cause
Cure
Normally used on flooded suction horizontal or canned turbine stations
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Inlet pressure switch is set too high.
To be performed by a qualified person only.
Check the pressure switch setting. (Located on lower left side of outside of enclosure.)
Pressure sensing line to pressure switch is clogged or valved off.
Ensure the valve is open, and blow out line if necessary.
Pressure is actually low – static.
If the city supplied water, check with them.
If the water is supplied by a tank, check the tank level, and verify that the supply valve is open.
If equipped with a suction manifold strainer, clean as required.
Ensure the supply piping not clogged or restricted.
Pressure is actually low – dynamic.
Ensure that the flow rate is less than the supply capacity.
LOSS OF PRIME FAULT
Cause
Cure
Normally used on end-suction centrifugal pumps
System has lost prime or air is trapped in system.
Check the system for prime lead in the foot valve or suction line.
Probe is dirty, corroded, or failed.
Clean or replace the probe as required.
Loss of prime relay failed.
To be performed by a qualified person only.
Check the relay for proper operation. Replace as required.
VFD FAULT
Cause
Cure
Look at VFD keypad to determine specific fault and consult the VFD manual.
Codes identified below are some of the more common ABB 550 codes. Consult your specific VFD manual for other drive applications.
Fault Code 2005 – Comm Fault. Communications with the controller have failed.
Verify communications cable is properly plugged into the controller. Verify connections at the VFD. (Note: This fault may be caused by normal operation of the controller using this fault to turn on the VFD Fault Light. If there is no VFD Fault on the controller, but other faults are present (Low pressure, high pressure, etc) then this fault is normal and will be reset when the primary fault is reset (F5).
Fault code 3 – dev overtemp (drive heatsink is overheated).
To be performed by a qualified person only.
The VFD fan won’t come on. If there is no power, check circuit breaker. Check for no continuity across transorb (located at wire terminal strip). If the power is good, replace the fan.
There is no water flow through heat exchanger. Make sure both ball valves are open.
Water is leaking at the heat exchanger. Repair or replace the coil.
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Fault code 2 – DC overvolt (intermediate circuit DC voltage is excessive).
To be performed by a qualified person only.
Check the input voltage (AC) to the drive. If high, contact the power company.
Fault code 6 – DC undervolt (intermediate circuit DC voltage is insufficient).
To be performed by a qualified person only.
Check the input voltage (AC) to the drive. If low, contact the power company.
Fault code 7 – AI1 loss (analog 1 input value is less than minimum value).
This can be a nuisance fault. Set parameter 3001 = 0 not sel.
Fault code 9 – motor overtemp (motor too hot, estimated value).
This can be a nuisance fault. Set parameter 3006 = 1050, and 3007 = 115.
Fault code 22 – supply phase (ripple voltage in the DC link is too high).
To be performed by a qualified person only.
Check the input fuses to the VFD. Review the phase failure section above.
MOTOR WON’T START
Cause
Cure!
Pump Fault is indicated on Controller display
To be performed by a qualified person only.
The overload for that motor is tripped. Reset, adjust, or replace as required.
Does the station have a high pump temperature option? Check if the water temperature is greater than 120°F. If it is, the pump is cavitating. If less than 120°F, the probe or relay is bad.
To be performed by a qualified person only.
Does the station have the individual pump phase fault option? See if the phase or voltage to motor is good. Check the motor fuses. Replace that pump's phase monitor as required.
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GLOSSARY OF TERMS
AC
Alternating Current. The voltage, and therefore current, constantly oscillates positive and negative. For North America, the line frequency is 60 Hz. Some other areas of the world use 50 Hz.
Across-the-line (XL)
Applying 100% of line voltage to a motor during startup and run. A simple large relay with a contact for each power phase (for 3 phase) is used to control the motor OFF/ON.
Analog
A signal that varies in some respect (voltage, current, frequency) in order to convey the value of some real world information (i.e. pressure, flow, temperature etc). A control system can take action based on the value of such a signal. Internally, the signal will be converted to some number based on the value of the signal.
Booster
A pump designed to increase the pressure of a pressurized irrigation line. This is usually used to move pressurized water from a lower to higher elevation area of the golf course.
Calibration
The act of or specific values used to scale the output of a measurement device to read real-world values.
Chemical injection
The process of adding chemicals to irrigation water to fertilize or medicate turfgrass.
Combo
A capacity level representing a predefined group of pumps on a station. Normally Combos are defined as follows:
Combo 1
Normally the PM pump.
Combo 2
Lead pump. Normally the VSP.
Controller
Device mounted in panel to control system operation. Also called Touch Screen or HMI.
Control valve
A valve designed to automatically open/close in order to maintain a specific set point pressure, flow, or level.
Control variable
A value that a control system monitors in order to perform some useful function.
Cycle time
The number of times an hour that a pump (PM or main pump) cycles on and off.
Cycling
This condition occurs when conditions require a pump to start if no pump is running, but require a pump to stop if a pump is running. This is excessive starting and stopping of one or more pumps and can be damaging to the equipment if allowed to continue.
DC
Direct Current. Such as a battery. The voltage is stable, and does not oscillate (at least intentionally).
Digital
A simple ON/OFF condition. For example, the presence or lack of a 120VAC signal on a wire is a digital condition.
Flooded suction
A type of system where the pumps (usually centrifugal) are fed by a pond or other body of water at very low pressure (atmosphere, or just a few feet of water column). Pumps for these systems must be carefully selected for low NPSHR (Net Positive Suction Head Requirements) or cavitation and pump damage can occur. Low inlet pressure safety is an excellent choice for these systems.
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Foot valve
A device used primarily on horizontal lift applications to maintain pump prime.
Frequency
(Hz) The number of oscillations per second of any system. Typically used to refer to electrical systems, such as AC power line frequency, or variable speed drive output frequency. This frequency defines the speed of an AC motor.
GPM
Gallons per minute. Units of flow for US use.
Input
A way for a control system to detect real-world occurrences. These can be digital or analog.
Inverter
Another term for Variable Frequency Drive (VFD). Actually, more correctly applied to the output circuitry of the drive, which converts DC voltage to AC voltage.
Lift
This refers to how high water must be "lifted" to reach the pump suction. Lift stations have even harsher NPSHR than Flooded Suction systems. Loss of prime safety is an excellent choice for these systems. Auto-re-prime systems are available to help maintain a full suction line (CRD reprime, vacuum pumps).
Must-run time
The amount of time (in seconds) that the pump must run.
Output
A way for a control system to generate real world actions. An output can be a 120VAC signal to turn on a pump, or a varying 4-20 mA signal to control the speed of a VFD. Many types of output are available.
Overload
A condition in which pumps are allowed to produce more flow rate than the motor that drives them is designed for. Also refers to a device in the control panel, which detects this situation and stops the pump in order to protect it.
Over-pressure accumulator
A counter that is used to determine the lag pump shut down sequence.
Overshoot
Indicates that the control variable has exceeded the set point value while the controller was trying to correct it.
PM pump
Pressure Maintenance Pump. Handles very light flow rates and leaks to prevent the main pumps from cycling.
Pressure reducing valve
(PRV) A control valve designed strictly for maintaining a specific downstream pressure.
Pressure switch
This is a normally open or normally closed switch that changes output state when the pressure exceeds the set point of the switch.
Pressure transducer
A device that converts actual pressure to a 4-20 mA signal that is input into the PLC which converts it back to an actual pressure reading.
PSI
Pounds per square inch. Units of pressure for US use.
Re-arming
This refers to turning the pertinent individual pump switch to the OFF position and then back to the On position to clear an individual pump fault.
Register
A memory location in a PLC. These can be used as configuration and storage or temporary storage during mathematical calculations.
Relay
This is a normally open or normally closed device that changes output state when it is energized or de-energized and sends or removes a 120VAC signal to the PLC.
Set point
The desired situation for a control variable. If the user wanted the irrigation system to operate at 120 PSI, that would be the set point for the controller.
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Speed test
The method used to shut down a VSP during normal automatic operation.
Temperature switch
This is a normally open or normally closed switch that changes output state when the temperature exceeds the set point of the switch.
Units
Gives context to numbers in the PLC. Units describe what the number is about, such as PSI, GPM.
VFD
Variable frequency drive. This allows a pump to run at variable speeds.
VSP
Variable speed pump. Refers to a pump being controlled by the variable frequency drive. In the case of pump systems, variable speed gives the controller the ability to change the output of the station by changing the speed of one or more pumps.
35
APPENDIX A — FINAL CHECK LIST
! Is the base unit properly leveled and secured? ! Are all lubrication points properly lubricated? ! Is the shut-off valve on to the pump suction open? ! Is the shut-off valve on the discharge line open? ! Is the piping properly supported so as to prevent strains on the unit?
! Is the distribution system purged of debris and air? Is the system filled?
CAUTION: Stuffing Box Damage
Do not run pumps dry. Fill and vent the pump volute prior to operation.
Failure to follow these instructions indicates a potentially hazardous situation, which, if not avoided, may result in property damage.
! Are the pump and driver shafts properly aligned?
Warning: Rotating Shafts
This pumping system must be disconnected from the main power supply before check or performing alignment.
Failure to follow these instructions could result in serious personal injury, death, and/or property damage.!
! Is the pump rotation correct? ! Is there adequate ventilation and air circulation?
! Have all piping connections been made? Have all flanged joints been checked for tightness?
Xylem Inc.
10661 Newkirk Street Dallas, TX 75220 Phone: 800-786-7480 www.flowtronex.com support@flowtronex.com
Flowtronex is a trademark of Xylem Inc. or one of its subsidiaries. © 2013 Xylem Inc. 19-001-251R3 September 2013
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