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Xylem Goulds HSC User Manual

Xylem Goulds HSC
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Model HSC
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
INSTRUCTION MANUAL
IM008
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Xylem Goulds HSC Specifications

General IconGeneral
TypeHorizontal Split Case
ApplicationWater supply, HVAC, industrial
Sizes3" to 16" discharge
Temperature RangeUp to 250°F (121°C)
MaterialsCast iron, bronze fitted, stainless steel
ApplicationsWater Supply, Irrigation, HVAC, Fire Protection

Summary

Important Pump Information and Safety

Unit Inspection and Damage Reporting

Inspect unit for damage and report any damage to the carrier/dealer immediately.

Electrical Supply Requirements

Ensure separate branch circuit with proper fuses/breakers and wire sizes per electrical codes. Install disconnect switch.

Motor Wiring and Voltage Drop

Wire motors for proper voltage, ensuring wire size limits voltage drop to 10% at motor terminals.

Electrical Component Specifications

Always use horsepower-rated switches, contactors, and starters.

Motor Protection

Use thermal protection for single-phase units or contactor with overload; fusing is permissible.

Maximum Operating Limits

Specifies liquid temperature, working pressure, and start frequency for the pump.

Regular Inspection and Maintenance

Regular inspection and maintenance will increase service life. Base schedule on operating time.

Pump Installation Guidelines

Pump Location and Liquid Source

Locate pump near liquid source, below level for automatic operation. Protect from freezing/flooding.

Servicing and Ventilation Space

Allow adequate space for servicing and ventilation around the pump.

Piping Support and Alignment

All piping must be supported independently of the pump and 'line-up' naturally.

Fitting Selection and Friction Loss

Avoid unnecessary fittings. Select sizes to minimize friction losses.

Installation Orientation

Units may be installed horizontally, inclined, or vertically.

Motor Placement Warning

Caution: Do not install with motor below pump; leakage/condensation affects motor.

Suction Piping Requirements

Low Static Suction Lift and Piping

Desired: low static suction lift and short, direct piping. Consult NPSHR curve for lifts above 15'.

Suction Pipe Sizing

Suction pipe must be at least as large as pump connection; smaller size degrades performance.

Eccentric Reducer for Larger Pipe

If larger pipe is needed, install an eccentric pipe reducer (straight side up) at the pump.

Installation Below Source of Supply

Install full-flow isolation valve for inspection/maintenance. Do not use to throttle pump.

Installation Above Source of Supply

Avoid air pockets, keep piping below suction connection, slope upward. Ensure airtight joints.

Foot Valve and Suction Strainer

Foot valve only if necessary for priming. Strainer open area must be triple pipe area.

Vortexing Prevention

Inlet size and submergence must prevent air entry via vortexing.

Threaded Connection Sealing

Use 3 to 4 wraps of Teflon tape to seal threaded connections.

Discharge Piping and Rotation

Discharge Piping Arrangement

Include a check valve between a gate valve and the pump for regulation and inspection.

Increaser Placement

If an increaser is required, place it between the check valve and the pump.

Threaded Connection Sealing

Use 3 to 4 wraps of Teflon tape to seal threaded connections.

Correct Rotation

Correct rotation is right-hand (clockwise when viewed from the motor end).

Operation and Maintenance

Pump Priming and Starting

Prime the pump (free of air, suction pipe full) and partially open discharge valve before starting.

Post-Operation Checks

Make complete check after unit runs under operating conditions and temperature stabilizes.

Bearing Lubrication

Ball bearings are in the motor, permanently lubricated; no greasing is required.

Running Dry Warning

Caution: Running pump dry will seize parts and damage the seal. Do not operate at zero flow.

Disassembly Procedures

General Disassembly Steps

Disassemble only as far as required for maintenance. Turn off power and drain system.

Liquid-End Disassembly

Remove casing bolts, then motor/liquid-end assembly. Remove impeller bolt and washer.

Impeller Removal

Remove impeller by pulling axially. Avoid using vanes to prevent damage.

Component Removal Sequence

Remove separator plate, shaft sleeve, intermediate stages, and last impeller/plate.

Mechanical Seal Removal

Remove seal retainer, shaft extension, rotating element, and motor adapter.

Reassembly and Troubleshooting

Reassembly Preparation

Clean all parts before assembly. Refer to parts list for replacement items. Reassembly is reverse of disassembly.

Mechanical Seal and O-Ring Inspection

Inspect mechanical seal components and o-rings. Replace if damaged. Lubricate o-rings with petroleum jelly.

Impeller and Iron Part Inspection

Inspect impellers for wear/blockage and iron parts for corrosion. Replace as necessary.

Wear Ring Replacement

Wear rings in interstage(s) and casing may need pressing or prying out and in for replacement.

Casing Bolt Tightening

Tighten casing bolts in a criss-cross manner to 35 ft-lbs to prevent o-ring binding.

Troubleshooting Motor Not Running

Common causes include tripped thermal protector, open breaker, blown fuse, binding parts, or improper wiring.

Troubleshooting Low Liquid Delivery

Causes include not primed, plugged discharge, incorrect rotation, small foot valve, or low voltage.

Troubleshooting High Power Consumption

Likely causes include binding parts, incorrect impeller diameter, high head/flow, or worn bearings.

Troubleshooting Noise and Vibration

Causes can be binding parts, worn bearings, loose pump/piping, or misalignment.

Parts List and Warranty Information

Pump Parts Identification

Detailed list of pump components with item numbers, part names, and quantities.

Motor Model Codes

Cross-reference of motor horsepower, model codes, and order numbers.

Limited Warranty Terms

Warranty covers defective parts for 12 months from installation or 18 months from manufacture, whichever is shorter.

Warranty Exclusions

Excludes labor, transportation, reinstallation costs, consequential damages, and loss from service interruption.

Warranty Definitions

Defines terms like 'Distributor', 'Dealer', and 'Customer' for warranty purposes.

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