Graymills MSPR Series Pump OMI - Manual (Page 2)

ROTATION
NOTICE: Incorrect rotation may cause damage to pump
in as little as 5 seconds and will void the warranty.
• Correct rotation is left-hand, COUNTERCLOCKWISE when
viewed from the motor end.
• Rotation can be verified by quickly energizing the pump for
an INSTANT with a quick on/off motion.
• To reverse three phase motor rotation interchange any two
power supply leads.
PIPING
• Piping should be no smaller than the pump discharge. Piping
should be kept as short as possible, avoiding unnecessary fit-
tings to minimize friction losses.
• All piping MUST be independently supported and MUST
NOT place any piping loads on the pump. It should “line up”
naturally.
• All joints MUST be airtight. Use 3 - 4 wraps of Teflon™
tape to seal threaded connections.
CAUTION
Never draw piping into place by forcing the pump
discharge connections.
INSTALLATION
WARNING
Multi-stage pumps produce considerable shut-off
pressure. Hoses and associated plumbing used with
these pumps should be rated for a minimum working
pressure of 180 psi. Failure to heed this warning
could result in ruptured lines and possible injury to
personnel.
• Maximum operating pressure: 175psig at 200°F
• Minimum and maximum liquid levels must be maintained for
proper pump operation. See Figure 1.
• Allow adequate space for servicing and ventilation. Protect
from freezing and flooding.
WARNING
• Use clean fluids only; no chips, grit or other foreign
particles.
• Graymills recommends the use of an inlet strainer
to minimize the size and amount of debris that
enters the pump. Contamination drawn into the
pump can cause internal damage and is not cov-
ered under warranty. Consult factory for recom-
mendations as to the appropriate size and type of
strainer to use.
• High Pressure Filters for keeping fluid clean must be used.
Graymills can provide the filter to trap particles, scale and
contaminants to prevent costly damage. Filter collects up to
20 cu. in. of material (HPFB20) without pressure drop.
Available in 14" length single cartridge model (HPFB10) or
24" length dual cartridge model (HPFB20). All models are
304 stainless steel for use with water-soluble and corrosive
liquids. Reusable stainless steel cartridges available in 10, 50,
and 100 mesh.
OPERATION
CAUTION
• Before starting, pump must be primed (free of air)
and discharge valves partially open.
• Do not run pump dry; damage to mechanical seal
will result.
• Use a Check valve on plumbing if pump is mounted
horizontally or if the potential to lose prime can
occur.
• Do not run against closed nozzles or damage to
pump and piping will result. Use Bypass as
described below.
• Do not operate at or near zero flow.
• If operating at or below 8 GPM or
where valves may be opened and
closed periodically, you must use a
bypass. This kit (Bypass Kit
C-32450) installs in the side of the
discharge head and provides a fluid
bypass when the pump is operated
against a closed discharge thus
preventing excessive heat build-up
which will damage the pump.
• After stabilizing the system at
normal operating conditions, check
the piping. If necessary, adjust the
pipe supports.
• To ensure proper suction, fluid level should cover first two
impellers (5" from the suction end of the pump).
• Pump may be mounted horizontally with included horizontal
mounting bracket.
• If pump is not generating enough pressure or flow, see
“TROUBLESHOOTING GUIDE”.
MAINTENANCE
WARNING
Failure to disconnect and lockout electrical power
before attempting any maintenance can cause shock,
burns or death.
• Motors have permanently lubricated bearings. No lubrication
is possible or necessary. Follow the motor manufacturer’s
recommendations for maintenance.
• To REMOVE pump from service, drain all fluid from pump
and piping.
Figure 1
Bypass Kit Diagram