Wilo Scot Pump MOTORPUMP 51 Installation Operation & Maintenance

Classic Pumps
J56 & C56 Frame
Straight Centrifugal
5/8", Type 6, 6A, & 21 Seal
Inspection
Check pump for shortage and damage immediately upon
arrival. Note damage or shortage on freight bill (bill of
lading); immediately file claim with carrier.
EXTERIOR — Pay particular attention to conduit box,
external hardware, and accessories. Touch up abrasions
or scratches with approved paint.
INTERNAL — If extensive or serious external damage
is noted, if impeller is damaged (look in ports), or if
shaft binds or sticks, disassemble as required to permit
internal inspection.
Handling
Handle with care. Dropping or jarring can seriously
damage motor bearings or break pump parts. Lift with
device having capacity for pump weight, and use lifting
hooks or eye bolts (if provided) or rig double sling
around motor frame and pump casing. Do not use sling
through pump motor adapter nor around suction or
discharge flanges.
Installation
Location
— Pump location should provide the
following:
1. Install as close to suction supply as possible.
2. Shortest and most direct suction pipe practical.
Suction lift must not exceed limit for pump. NPSH
available must equal or exceed pump requirement.
3. Suction port below pumping level to provide
priming.
4. Room for inspection and maintenance.
5. Correct power supply to motor; all wiring should
meet National Electrical and Local Codes and
Regulations.
6. If outdoors, protection from the elements, freezing
and water damage due to flooding.
Piping —
Suction and discharge gauges are useful to
check pump operation and are excellent trouble in-
dicators. Install gauges in the lines if pump ports do
not have gauge taps. Observe these precautions when
installing piping:
1. Support close to, but independently of pump.
2. Use the next larger pipe size for suction and dis-
charge.
3. Keep as straight as possible. Avoid bends and fit-
tings.
4. Remove burrs and sharp edges, ream pipe cuts, and
make joints air-tight.
5. Don't spring pipe to make connections. Strain must
not be transmitted to pump.
Scot Pump, A Wilo Brand +1-262-204-6600
W66 N1256 Forward Way www.scotpump.com
Cedarburg, WI 53012 scot.sales@wilo.com
MOTORPUMP™
Installation • Operation • Maintenance
6. Allow for pipe expansion with hot fluids; expansion
joints are not recommended.
Suction
— Size and install suction piping to keep
pressure loss at minimum and to provide correct NPSH
by observing the following:
1. The suction pipe should be equal in size or
preferably one size larger than the suction
connection of the pump. If pipe is larger than the
pump suction, an eccentric pipe reducer should be
used at the pump.
2. Pipe should slope upward to pump, even for
horizontal run.
3. Use 45-degree or long-sweep 90-degree elbows.
4. A valve in the suction is necessary only on positive
suction head installation and must not be used
to throttle the pump. The suction valve should be
installed for maintenance purposes only.
—
Discharge
Pumps permit discharge port location
at any of four positions, 90 degrees apart. Change by
removing cover bolts, rotating casing, and replacing
bolts. Do not slice O-ring. Scot does not recommend
bottom vertical discharge due to erratic pump
performance. Ensure there is adequate clearance with
selected position between wall or tank, motor conduit
box, and grease fittings. Casing may extend beyond base
or feet.
1. Short discharge lines may be the same size as the
discharge port. Long runs require a pipe larger than
the discharge port.
2. Long horizontal runs require a grade as even as
possible. Avoid high spots and loops. Trapped air
will throttle flow and may result in erratic pumping.
3. Install check and gate valves in discharge line;
check valve (if used) between pump and gate valve.
Operation
Pre-Start —
Before initial start of the pump, check as
follows:
1. The rotation must be checked upon installation.
Close, then break the contacts quickly and observe
the rotation of the exposed portion of the rotating
parts. Rotation must agree with the rotation arrow
on the motor. For all pumps, the standard rotation
is counterclockwise when viewed from the suction
end. Motor wiring is easily changed in the field.
Observe the wiring diagram on the inside of the
terminal box cover, or on the motor nameplate.
2. Check voltage, phase and frequency of line circuit
with motor nameplate.
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A WILO BRAND
IOMJ56C56
D22