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DESCRIPTION and SPECIFICATIONS:
The Model HSC is a multi-stage, end-suction, centrifugal
pump for general liquid transfer service, booster applications,
etc. Liquid-end construction is cast iron, stainless steel and
engineered composites.
All units have NEMA 48 Frame single-phase, 115/230V,
60Hz motors with C-face mounting and NEMA 56J threaded
shaft extensions.
1. 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., in compliance
with 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, contactor and
starters.
1.5. Motor Protection
1.5.1. Single-phase: Thermal protection for single-phase
units is sometimes built in (check nameplate). If
no built-in protection is provided, use a contactor
with a proper overload. Fusing is permissible.
1.6. Maximum Operating Limits:
Liquid Temperature: 160ºF (71ºC)
Working Pressure: 125 PSI
Starts per Hour:
20, evenly distributed.
1.7. Regular inspection and maintenance will increase service
life. Base schedule on operating time. Refer to Section 8.
2. Installation
2.1. Locate pump as near liquid source as possible (below level
of liquid for automatic operation).
2.2. Protect from freezing or flooding.
2.3. Allow adequate space for servicing and ventilation.
2.4. All piping must be supported independently of the
pump, and must "line-up" naturally.
Never draw piping into place by forcing the pump suction and
discharge connections.
2.5. Avoid unnecessary fittings. Select sizes to keep friction
losses to a minimum.
2.6. Units may be installed horizontally, inclined or vertically.
Do not install with motor below pump. Any leakage or
condensation will affect the motor.
2.7. Foundation must be flat and substantial to eliminate
strain when tightening bolts. Use rubber mounts to
minimize noise and vibration.
2.8. Tighten casing hold-down bolts (XXX) before connecting
piping to pump.
2.9. No field alignment of pump to motor is necessary as
pumps are close-coupled.
2
CAUTION
CAUTION
CAUTION
3. Suction Piping
3.1. Low static suction lift and short, direct suction piping is
desired. Consult pump performance curve for Net Positive
Suction Head Required (NPSHR), especially for lifts above
15'.
3.2. Suction pipe must be at least as large as the suction
connection of the pump. Smaller size will degrade
performance.
3.3. If larger pipe is required, an eccentric pipe reducer (with
straight side up) must be installed at the pump.
3.4. Installation with pump below source of supply:
3.4.1.Install full flow isolation valve in piping for
inspection and maintenance.
Do not use suction isolation valve to throttle pump.
3.5. Installation with pump above source of supply:
3.5.1. Avoid air pockets. No part of piping should be
higher than pump suction connection. Slope piping
upward from liquid source.
3.5.2. All joints must be airtight.
3.5.3. Foot valve to be used only if necessary for priming,
or to hold prime on intermittent service.
3.5.4. Suction strainer open area must be at least triple
the pipe area.
3.6. Size of inlet from liquid source, and minimum
submergence over inlet, must be sufficient to prevent air
entering pump through vortexing. See Figures 2 through
5.
3.7. Use 3 to 4 wraps of Teflon tape to seal threaded
connections.
H min.
D
Figure 2
3.0D
min.
1.5D
H min.
min.
min.
D
D
D
2
Figure 4
4. Discharge Piping
4.1. Arrangement must include a check valve located between
a gate valve and the pump. The gate valve is for regulation
of capacity, or for inspection of the pump or check valve.
4.2. If an increaser is required, place between check valve and
pump.
4.3. Use 3 to 4 wraps of Teflon tape to seal threaded
connections.
5. Rotation
5.1. Correct rotation is right-hand (clockwise when viewed
from the motor end). Switch power on and off quickly.
Observe shaft rotation. To change rotation:
5.1.1. Single-phase motor: Non-reversible
5.1.2. Three-phase motor: Not offered.
CAUTION
H min.
---------
D
---------
Figure 3
H
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
V = Velocity in feet per second
=GPM x 0.321
GPM x 0.4085
2
Area
D
Figure 5
V
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