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GENERAL

  1. Most accidents can be avoided by using 

 

 

COMMON SENSE.

  2. Read the operation and maintenance 

instructions manual supplied with the pump.

  3. Do not wear loose clothing that can become 

entangled in the impeller or other moving 

parts.

  4. This pump is designed to handle materials that 

could cause illness or disease through direct 

exposure.  Wear adequate protective clothing 

when working on the pump or piping.

ELECTRICAL

  5. To reduce the risk of electrical shock, pump 

must be properly grounded in accordance with 

the National Electric Code and all applicable 

state and local codes and ordinances.

  6. To reduce risk of electrical shock, disconnect 

the pump from the power source before

 

 handling or servicing.

  7. Any wiring to be done on pumps should be 

done by a qualified electrician.

  8. Never operate a pump with a power cord that 

has frayed or brittle insulation.

  9. Never let cords or plugs lie in water.

 10. Never handle connected power cords with

 

  wet hands.

PUMPS

 11. Pump builds up heat and pressure during 

operation; allow time for pump to cool before 

handling or servicing.

12. Only qualified personnel should install,

 

operate or repair pump.

13. Keep clear of suction and discharge openings.  

DO NOT

 insert fingers in pump with power 

connected.

14. Do not pump hazardous material not 

recommended for pump (flammable,

 

caustic, etc.).

15. Make sure lifting handles are securely

 

fastened each time before lifting.

16. Do not lift pump by the power cord.

17. Do not exceed manufacturer's 

recommendation for maximum performance, 

as this could cause the motor to overheat.

18. Secure the pump in its operating position so it 

cannot tip over, fall or slide.

19. Keep hands and feet away from impeller when 

power is connected.

20. Submersible sump pumps are not approved 

for use in swimming pools, recreational water 

installations, decorative fountains or any 

installation where human contact with the 

pumped fluid is common.

21. Do not operate pump without safety devices

 

in place.

22. For hazardous locations, use pumps that are 

listed and classified for such locations.

IMPORTANT!

   

Myers is not responsible for 

losses, injury or death resulting from a failure 

to observe these safety precautions, misuse or 

abuse of pumps or equipment.

GENERAL INFORMATION

Pump Models:

  These instructions cover the 

installation and service of the Myers SX50 and 

SX50H series submersible sump pumps.  The 

motors are CSA listed for hazardous sewage 

locations Class 1, Div. 1, Group D.

Motor HP & Voltages:

  The SX50/SX50H sump 

pumps are offered in single and three phase. 

Voltages will vary according to the application and 

can be seen in the tables in this manual.

Electrical Controls:

  All of these pump models must 

be used with a control panel.  Myers built control 

panels are designed to supply the correct electrical 

controls, motor starting equipment and include 

the circuitry for moisture and heat sensors.  It is 

recommended that a Myers built control panel be 

used so that all warranties apply.

General Construction:

  The SX50/SX50H motor 

construction is designed to meet CSA requirements 

for Class 1, Group D sewage applications.  These 

models are approved and nameplated with a CSA 

file number.  A cross sectional view of the internal 

workings of the pumps can be seen on pages 7 and 

8. The motor chamber and seal chamber are filled 

with a high dielectric type oil for improved lubrication 

and heat transfer of the bearings and motor.  Since 

the bearings have been designed for 50,000 hours 

of life, the oil should never require replacement 

23833A465

2

WARNING!  IMPORTANT SAFETY INSTRUCTIONS!  READ CAREFULLY BEFORE 

INSTALLATION.  This manual contains important information for the safe use of this 

product.  Read this manual completely before using this product and refer to it often 

for continued safe product use.  DO NOT THROW AWAY OR LOSE THIS MANUAL.  

Keep it in a safe place so that you may refer to it often.

Содержание SX50

Страница 1: ...23833A465 03 10 SX50 SX50H Sump Pumps Used in Hazardous Locations Class 1 Division 1 Group D Installation and Service Manual ...

Страница 2: ...ns or any installation where human contact with the pumped fluid is common 21 Do not operate pump without safety devices in place 22 For hazardous locations use pumps that are listed and classified for such locations IMPORTANT Myers is not responsible for losses injury or death resulting from a failure to observe these safety precautions misuse or abuse of pumps or equipment GENERAL INFORMATION Pu...

Страница 3: ... due to an overheat condition it will not start until the motor has cooled and the heat sensor reset button is manually pushed on the front of the Myers control panel This circuitry is provided in the Myers control panel designs The SX50 SX50H pumps are equipped with internal thermostats The SX50 SX50H models are designed to meet Class B heat rise of 266 F 130 C Note Failure to use proper circuitr...

Страница 4: ...d required for hazardous locations An intrinsically safe control panel relay will limit the current and voltage to the level controls A Myers control panel can be supplied with this type circuitry The float level controls maintain the basin sewage water level by controlling pump turn on and turn off levels 1 The lower turn off control should be set so that the pump stops with the water covering th...

Страница 5: ...age Brush new dielectric oil around the rubber portion of the stationary assembly and into the pocket in the seal housing Note keep the oil off the seal face Without scratching the seal face press the ceramic stationary portion into the seal housing A piece of PVC pipe that fits onto the face of the seal works well for installation With clean cloth lightly wipe the face of the seal surface to make...

Страница 6: ...SX50 DIMENSIONS Dimensions in mm SX50H DIMENSIONS Dimensions in mm FIG 1 23833A465 6 ...

Страница 7: ...SX50 PUMP PARTS FIG 2 23833A465 7 ...

Страница 8: ...SX50H PUMP PARTS FIG 3 23833A465 8 ...

Страница 9: ...65A013 16 RING RETAINING 1 11816A006 11816A006 17 ROTOR W SHAFT 1Ø 1 26859C101X 26859C101X ROTOR W SHAFT 3Ø 1 26859C104X 26859C104X 18 BEARING BALL LOWER 1 08565A018 08565A018 19 HOUSING UPPER SEAL 1 21574D100X 21574D100X 20 SEAL SHAFT 2 21576A010 21576A010 21 RING RETAINING 1 12558A006 12558A006 22 ELECTRODE W RESISTOR 1 22578A003 22578A003 23 O RING 6 1 8 x 5 7 8 x 1 8 2 05876A125 05876A125 24 F...

Страница 10: ... x x 23833A465 10 WIRING DIAGRAMS FIG 6 CORD CONNECTORS NOTE All components shown must be approved for hazardous locations ...

Страница 11: ...23833A465 11 WIRING SCHEMATIC FOR 230V 1Ø SIMPLEX SYSTEM FIG 7 ...

Страница 12: ...8 WIRING SCHEMATIC FOR 230V 3Ø DUPLEX SYSTEM X Z NOTES 1 Level switches must be rated a minimum of 2 amps 120V 2 Torque all white field wiring terminals to 8 in lbs 3 Field wiring must be 60 C copper wire minimum 4 items not supplied in panel ...

Страница 13: ...MATIC FOR 230V 3Ø SIMPLEX SYSTEM NOTES 1 Level switches must be rated a minimum of 2 amps 120V 2 Torque all white field wiring terminals to 8 in lbs 3 Field wiring must be 60 C copper wire minimum 4 items not supplied in panel ...

Страница 14: ...MATIC FOR 460V 3Ø SIMPLEX SYSTEM NOTES 1 Level switches must be rated a minimum of 2 amps 120V 2 Torque all white field wiring terminals to 8 in lbs 3 Field wiring must be 60 C copper wire minimum 4 items not supplied in panel ...

Страница 15: ...e only at an authorized service station Note readings should be taken with line leads disconnected from the control panel Resistance of Windings Every motor winding has a fixed resistance The windings must check close to the values given in the tables to operate properly See the motor electrical data chart Figure 4 Use an ohmmeter and set to the one ohm scale Read the resistance with the motor lea...

Страница 16: ...en with control box before pulling pump 2 If this condition happens after an electrical storm motor or control box may be damaged by lightning 3 Resistance reading of the motor with lead wires disconnected from the control box can determine if trouble is in motor or control box 1 Impeller may be partially clogged with some foreign objects causing noise and overload on the motor 1 Lower control swi...

Страница 17: ...23833A465 NOTES ...

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Страница 19: ......

Страница 20: ...______________________________ D Incoming line voltage _________________________ Actual _____________________________ E Voltage to pumps ____________________________ Actual _____________________________ F Type of junction box _____________________________ Manufacturer _______________________ G Are floats installed in wet well _______________________________________________________ H Are floats set...

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