Installation; Maintenance - Xylem Goulds Marlow Series Instruction Manual

You are now the owner of a Marlow pump. This pump was carefully inspected and subjected to
final performance tests before releasing for shipment. In order to achieve maximum performance,
RECOMMENDED PRECAUTIONS
1. All electrical wiring of the motor installation, repair and
service must be done by a licensed electrician in
accordance with applicable electrical codes.
2. No modifications, additions or deletions should be made
to the pump, without prior approval of the factory.
3. Pump designed for swimming pool service only. Consult
factory for any other applications.
4. Motors driving the pumps may operate at high
temperatures and to avoid burns – keep hands off the
motor shell, etc.
5. After servicing a pump, always re-install the safety
devices as originally found prior to disassembly.
6. Local electrical codes may require use of a Ground Fault
Circuit Interrupter (GFCI) on circuits supplying power to
pool equipment. Marlow recommends the use of a GFCI
on all installations.
OPERATING INSTRUCTIONS
GENERAL
This pump was designed for the purpose of being used as a
circulation pump for swimming pools. For other applications,
consult the manufacturer.
Our shipping container has been specifically designed to
prevent transit damage. Any damage should be carefully
noted on the delivery ticket and a claim filed promptly with
the carrier.
LOCATION
Locate the pump as close as possible to the pool (never
more than 8 feet above pool water level). Install on a rigid
foundation, preferably 2" or more above ground level. Pro-
vide the necessary space around the pump for future
inspection and servicing of the unit. We recommend a
louvered housing to protect exposed motors from the sun
and rain. Allow for ventilation. Housing should clear the
motors by a minimum of 10" at all points.

INSTALLATION

1. Suction line should be as large as the suction port of the
pump. All piping must be air tight. If possible keep all
suction lines below pool water level until just before the
pump. Suction lines should slope toward the pump.
The threads of pipe fittings screwed into the pump body
must be sealed with acceptable pipe thread compound.
2. It is recommended that pipe unions be installed on the
suction and discharge pipes close to the pump. Thus, the
pump-motor assembly may be removed with ease for
service and storage.
CONGRATULATIONS
please follow the simple instructions in this manual.
CAUTION: READ CAREFULLY
The performance of Marlow pumps is based upon
clear, cold, fresh water with suction conditions as shown
on the performance curve. If used to pump other liquids,
pump performance may differ from rated performance
based on the different specific gravity, temperature,
viscosity, etc. of the liquid being pumped. A standard
pump may not be safe for pumping all types of liquids,
such as toxic, volatile or chemical liquids, or liquids under
extreme temperatures or pressures. Please consult
Marlow catalogs as well as local codes and general
references to determine the appropriate pumps for your
particular application. Since it is impossible for us to
anticipate every application of a Marlow pump, if you
plan to use the pump for a non-water application, consult
Marlow beforehand to determine whether such application
may be proper or safe under the circumstances. Failure to
do so could result in property damage or personal injury.
3. Tighten the pump fittings only as much as it is required to
insure a tight connection (two turns past hand tight is
sufficient). Excessive torque (more than 30-foot pounds) is
unnecessary and may damage the pump.
4. The weight of the piping should be supported indepen-
dently and not carried by the pump.
ROTATION
The pump is specifically designed to rotate in a counter
clockwise direction when viewing the motor from the pump
suction. Three-phase motors can rotate in either direction.
Momentarily, start or "bump" the motor to check the rotation
of the pump shaft. Interchanging any two leads of a three-
phase motor will reverse the rotation.
PRIMING
Fill the pump tank with water before starting. This may be
done through the strainer cover. This is necessary to allow
pump to prime and to prevent permanent damage. Except in
freezing weather always keep liquid in the pump tank. No
further lubrication of the pump end is necessary including
the seal assembly. If flow does not start within five minutes,
stop motor and determine cause (see Trouble Guide on page
7). Be sure all suction and discharge valves are open when
the pump is running. Operating the pump with a closed valve
in the system can cause pump damage.

MAINTENANCE

The strainer built into the pump should be inspected and
cleaned daily. These strainers are easy to clean. Loosen the
hand knob(s) and remove the strainer cover to expose the
strainer basket. Remove the basket and clean. Inspect the
cover gasket; if damaged, replace. Install the strainer cover,
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