Pumps Installation, Operation and Maintenance Instructions
Table of Contents
Safety Instructions ........................................................ 2
Description and Specifications ...................................... 2
1. Important Information ............................................. 2
2. Installation ................................................................ 2
3. Suction Piping........................................................... 3
4. Discharge Piping ....................................................... 3
5. Motor to Pump Shaft Alignment .............................. 3
6. Rotation ................................................................... 4
7. Operation ................................................................. 4
8. Maintenance ............................................................. 4
9. Disassembly .............................................................. 4
10. Reassembly ............................................................. 5
11. Trouble Shooting Guide ......................................... 5
Materials of Construction ............................................. 6
Goulds Pumps Limited Warranty.................................. 8
The Models 3657 (close-coupled) and 3757 (framemounted) are single-stage end-suction pumps designed for ultra-pure water systems, O.E.M. applications, food and beverage processing and chemical services not demanding ANSI standard equipment.The pumps have fully enclosed, investment cast, AISI TYPE
316 stainless steel impellers, key driven and held in position by an o-ring sealed locknut. The full volute casings are also investment castings of AISI TYPE 316 stainless steel, back pull-out configuration, with connections for mating with standard 150 lb. ANSI flanges. Shafts are protected with o-ring sealed stainless steel sleeves. Shaft sealing is with mechanical seal.
Important:
1.1. Inspect unit for damage. Report any damage to carrier/ dealer immediately.
1.2. Electrical supply must be a separate branch circuit with fuses or circuit breakers, wire sizes, etc. per National and Local electrical codes. Install an all-leg disconnect switch near pump, ALWAYS DISCONNECT ELECTRICAL POWER WHEN HANDLING PUMP OR CONTROLS.
1.3. Motors must be wired for proper voltage. Motor wiring diagram is on motor nameplate. Wire size must
limit maximum voltage drop to 10% of nameplate voltage at motor terminals, or motor life and pump performance will be lowered.
1.4. Always use horsepower-rated switches, contactors and starters.
1.5. Motor Protection:
1.5.1. Single-phase: Thermal protection for singlephase units is sometimes built in (check nameplate). If no built-in protection is provided, use a contactor with a proper overload. Fusing is permissible.
1.5.2. Three-phase: Provide three-leg protection with properly sized magnetic starter and thermal overloads.
1.6. Maximum Operating Limit(s):
Liquid Temperature: 212°F (100°C) with standard seal. 250°F (120°C) with optional high temp. seal.
Pressure: 175 PSI.
Starts per Hour: 20, evenly distributed.
1.7. Regular inspection and maintenance will increase service life. Base schedule on operating time.
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