SX50/SX50H Sump Pumps Used in Hazardous Locations Class 1, Division 1, Group D Installation and Service Manual 23833A465 03/10
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. GENERAL 19. Keep hands and feet away from impeller when power is connected. 20.
under normal operating conditions. An air space above the oil level in both the seal and motor chambers is provided to allow for the expansion of the oil when at operating temperature. The power and control lines are sealed and strain relieved on the outside entrance with a standard cord grip, and internally through the use of a dielectric potting resin surrounding the electrical wires. This circuitry is provided in the Myers control panel designs.
rotation of a single phase pump is set properly at the factory. The float level controls maintain the basin sewage water level by controlling pump turn-on and turn-off levels. For three phase motor, the black, white, and red conductors are power leads and the green is ground. 1. The lower turn-off control should be set so that the pump stops with the water covering the entire motor housing. Consult the factory for any settings below this point.
3. Using a proper wrench, the impeller retaining nut must be removed. This may require a piece of wood placed between the vanes to keep the impeller from rotating while removing the nut. Loctite® is used on this bolt and heating to 450–500°F may also be required to loosen. The impeller is mounted on a threaded shaft. To remove impeller, rotate impeller with one hand, while holding pump shaft with screwdriver. seal housing.
SX50 DIMENSIONS [Dimensions in mm] SX50H DIMENSIONS [Dimensions in mm] FIG.
SX50 PUMP PARTS FIG.
SX50H PUMP PARTS FIG.
SX50/SX50H PARTS LIST Ref. 1 2 3 4 5 6 7 8 9 10 11 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Description CAP, CORD CONNECTOR TUBE, PLASTIC x 1-1/4" LG. SCREW, CAP 5/16 x 1-1/4" LG. O-RING, 4-1/2" x 4-1/4" x 1/8" CAP, UPPER BEARING O-RING, 4-7/8" x 4-5/8" x 1/8" PLUG, PIPE 1/4" NPT SCREW, MACH. #10 x 1/2" LG. WASHER, LOCK SCREW, MACH. 5/16 x 1" LG. (SX50) SCREW, MACH. 5/15 x 1" LG.
WIRING DIAGRAMS x x " CORD CONNECTORS " " FIG. 6 NOTE: All components shown must be approved for hazardous locations.
WIRING SCHEMATIC FOR 230V, 1Ø SIMPLEX SYSTEM FIG.
WIRING DIAGRAM 230V, 1Ø FIG. 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.
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.
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.
WIRING SCHEMATIC FOR 460V, 3Ø DUPLEX SYSTEM X 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. Z CHECK LIST IF PUMP DOES NOT OPERATE PROPERLY Checking for Moisture in Motor: Use an ohmmeter or a megger and set on highest scale.
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 red light comes on due to high water level in basin. 1. Push in on red reset button to reset overload.
NOTES 23833A465
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START-UP REPORT Installing Contractor: _____________________________________ Phone: _________________________ Sales Contact: __________________________________________ Phone: _________________________ Customer & Location _____________________________________________________________________ 1. SYSTEM INFORMATION A. Size of wet well: __________________________________ Manufacturer:_____________________ B. Discharge from bottom of basin: ___________________ Location: __________________________ C.
