Related Manuals for MYERS SX50
Summary of Contents for MYERS SX50
- Page 1 SX50/SX50H Sump Pumps Used in Hazardous Locations Class 1, Division 1, Group D Installation and Service Manual 23833A465 03/10...
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Page 2: General Information
3. Do not wear loose clothing that can become installation where human contact with the entangled in the impeller or other moving pumped fluid is common. parts. 21. Do not operate pump without safety devices 4. This pump is designed to handle materials that in place. could cause illness or disease through direct 22. For hazardous locations, use pumps that are exposure. Wear adequate protective clothing listed and classified for such locations. when working on the pump or piping. IMPORTANT! Myers is not responsible for ELECTRICAL losses, injury or death resulting from a failure 5. To reduce the risk of electrical shock, pump to observe these safety precautions, misuse or abuse of pumps or equipment. 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 GENERAL INFORMATION the pump from the power source before Pump Models: These instructions cover the handling or servicing. installation and service of the Myers SX50 and 7. Any wiring to be done on pumps should be SX50H series submersible sump pumps. The... - Page 3 This circuitry is provided in the Myers control panel designs. above the oil level in both the seal and motor chambers is provided to allow for the expansion of The SX50/SX50H pumps are equipped with the oil when at operating temperature. The power internal thermostats. The SX50/SX50H models and control lines are sealed and strain relieved on are designed to meet Class B heat rise of 266°F the outside entrance with a standard cord grip, and (130°C). internally through the use of a dielectric potting resin surrounding the electrical wires. Note: Failure to use proper circuitry and to connect the motor overheat protection in the control panel Internal connection wiring diagrams are shown in would negate all warranties and CSA Listings. Figure 8. All of the pump fasteners and shafts are made from corrosion resistant stainless steel, while Motor Seal Failure Warning: The seal chamber is the pump castings are made of ASTM A-48 Class oil filled and provided with moisture sensing probes 30 cast iron, and the multivane vortex impellers are to detect water leakage through the lower shaft seal. made from Class 20 cast iron. The probes can also detect moisture present in the upper motor housing. General Installation: Various configurations and methods of plumbing this series of sump pumps may The presence of water energizes a red seal leak be used. warning light at the control panel. This is a warning Note: If the SX50/SX50H hazardous location light only, and does not stop the motor. It indicates a leak has occurred and the pump must be repaired. pumps are used in conjunction with a rail lift-out Normally, this indicates the outboard seal has system, it must be a UL or CSA listed nonsparking leaked. Allowing the unit to operate too long after system for hazardous locations.
- Page 4 Code and local codes. Pump: The fluid end of the pump is field serviceable Electrical Motor Controls: All electrical controls and can be disassembled in case of wear, damage, and motor starting equipment should be as specified plugging or outboard seal failure. The following will in these instructions. Consult factory for any describe the disassembly and reassembly process. acceptable alternatives. For hazardous locations the controls and control panel must be installed outside WARNING! Disconnect pump from power source the hazardous area. Only approved controls that are before servicing or handling. intrinsically safe may be used with these pumps. Disassembly Junction Box: If a junction box is used in a 1. With the pump located in a secure place, remove hazardous location, it must be an approved type the bolts fastening the seal housing to the volute. with approved cord connectors. Wires from the The motor and impeller can now be removed as junction box must pass through an approved seal a unit. connector for hazardous locations. 2. Lay the unit down on its side. If the lower seal is Level Sensing Controls: Intrinsically safe-type to be removed, it is recommended that the oil in float controls are recommended for all applications the seal chamber be drained. This can be done and required for hazardous locations. An intrinsically by removing the lower seal chamber plug and safe control panel relay will limit the current and draining the oil into a holding container. voltage to the level controls. A Myers control panel can be supplied with this type circuitry. 23833A465...
- Page 5 4. The motor and impeller assembly can be installed abrasive material may indicate that the upper into the volute, making sure that the units are seal has also been damaged. Pressurizing the aligned properly. Install the volute retaining bolts motor housing assembly between 7 and 10 psi and tighten. and observing any drop in pressure will indicate if the upper seal is functioning properly. 5. Air tends to trap in the pump case when water rises in the sump or when the pump is lowered Note: Upper seal repairs must be done at a Myers into the water after service. To vent off this air a authorized service center or at the Myers factory. small hole is drilled into the volute casting. Be sure this vent hole is clean after any service Any unauthorized field repair voids warranty and the work on pump. Air venting is not a problem after CSA listing. initial start. Reassembly 1. Remove the ceramic portion of the new seal from the package. 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...
- Page 6 SX50 DIMENSIONS [Dimensions in mm] SX50H DIMENSIONS [Dimensions in mm] FIG. 1 23833A465...
- Page 7 SX50 PUMP PARTS FIG. 2 23833A465...
- Page 8 SX50H PUMP PARTS FIG. 3 23833A465...
- Page 9 05022A054 05022A054 SCREW, MACH. #10 x 1/2" LG. 05434A034 05434A034 WASHER, LOCK 06107A015 06107A015 SCREW, MACH. 5/16 x 1" LG. (SX50) 07597A017 SCREW, MACH. 5/15 x 1" LG. (SX50H) 07597A017 HOUSING W/STATOR (1Ø) 21571D150K 21571D150K HOUSING W/STATOR (3Ø) 230/460V 21571D152K...
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Page 10: Wiring Diagrams
WIRING DIAGRAMS " CORD CONNECTORS " " FIG. 6 NOTE: All components shown must be approved for hazardous locations. 23833A465... - Page 11 WIRING SCHEMATIC FOR 230V, 1Ø SIMPLEX SYSTEM FIG. 7 23833A465...
- Page 12 WIRING DIAGRAM 230V, 1Ø FIG. 8 WIRING SCHEMATIC FOR 230V, 3Ø DUPLEX 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. 23833A465...
- Page 13 WIRING SCHEMATIC 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. 23833A465...
- Page 14 WIRING SCHEMATIC 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. 23833A465...
- Page 15 WIRING SCHEMATIC FOR 460V, 3Ø DUPLEX 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. CHECK LIST IF PUMP DOES NOT OPERATE PROPERLY Checking for Moisture in Motor: Use an Resistance of Windings: Every motor winding has ohmmeter or a megger and set on highest scale. a fixed resistance. The windings must check close Readings on the large power cord between any to the values given in the tables to operate properly. of the conductors red, black or white to the green conductor or to the motor housing should be See the motor electrical data chart (Figure 4). Use greater than 1,000,000 ohms (megohm). A motor an ohmmeter and set to the one ohm scale. Read will probably run with a lower reading, but if the the resistance with the motor leads disconnected pump is out of service and the value of the reading from the pump control panel. is below 1,000,000 ohms (1 megohm), the motor housing and stator should be removed and baked in a drying oven at 220°F. This service work should be done only at an authorized service station. Note, readings should be taken with line leads disconnected from the control panel. 23833A465...
- Page 16 CONDITION PROBABLE CAUSE Red light comes on at control box. This indicates some water has leaked past the lower seal and has entered the seal chamber and made contact with the electrode probe. Pump must be removed for replacement of lower seal. This preventive repair will save an expensive motor. Overload trips at control box and alarm buzzer or flashing 1. Push in on red reset button to reset overload. If red light comes on due to high water level in basin. overload trips again after short run, pump has some damage and must be removed from basin for checking. 2. Trouble may be from clogged impeller causing motor to overload or could be from failed motor. 3. Trouble may be from faulty component in control box. Always check control box before removing pump. Yellow run light stays on continuously. 1. Indicates H-O-A switch may be in the Hand position. 2. Level control switch may have failed causing pump to continue to operate when water is below lower control. 3. Impeller may be partially clogged causing pump to operate at very reduced capacity. 4. Gate valve or check valve may be clogged causing low pump flow. 5. Pump may be air locked. Circuit breaker trips. 1. Reset breaker by pushing completely down on handle then back to On position. If breaker trips again in few seconds it indicates excessive load probably caused by a short in the motor or control box. Check out instructions given with control box before pulling pump.
- Page 17 NOTES 23833A465...
- Page 18 23833A465 03/10...
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Page 20: Start-Up Report
Acknowledge that all information is accurate and proper procedures have been followed: Customer Signature:__________________________________________________ Date ___________ Start-up Technician:__________________________________________________ Date __________ Send to: Warranty Department, 740 E. Ninth Street, Ashland, OH 44805, Fax: 419-207-3344, or e-mail to: startupreport@myers.com We will make this a permanent part of our file on this order.
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