3
Instruction Manual
2.1 PUMP LOCATION AND INSTALLATION
Locate pump in an area convenient to solution tank
and electrical supply.
The pump should be accessible for routine
maintenance, and should not be operated in
ambient temperatures above 113°F (45°C).
If the pump will be exposed to direct sunlight, LMI
®
black, UV resistant tubing should be installed.
This pump is cord connected and not intended
for permanent mounting to a building. However,
temporary mounting to stabilize the pump during
operation may be necessary as long as tools are
not required for the installation or removal of the
pump.
2.2 PUMP MOUNTING
The pump can be mounted in one of two ways:
A. FLOODED SUCTION
(ideal installation); or
B. SUCTION LIFT
- when suction lift is less
than 5 feet (1.5 m) for solutions having a
specific gravity of water or viscosity of less
than 100 cSt (centistokes). For denser or
more viscous solutions, consult distributor.
Note that suction conditions can affect
the performance of the pump. This effect
is more pronounced with lower pressure
pumps. Consult your distributor for additional
information.
Your LMI
®
metering pump must be mounted
so that the suction and discharge valves are
vertical.
NEVER position pump head and
fittings horizontally
.
2.2.1 Flooded Suction
For flooded suction the pump is mounted at the
base of the storage tank. This installation is the
most trouble-free, and is recommended for very
low outputs, solutions that gasify, and high-viscosity
solutions. Since the suction tubing is filled with
solution, priming is accomplished quickly and the
chance of losing prime is reduced. A foot valve is
not necessary in a flooded suction installation.
When pumping downhill or into low or no pressure
system, a back pressure/anti-syphon device
should be installed to prevent overpumping or
syphoning. Although popular for all solutions, LMI
®
recommends flooded suction installations for all
high-viscosity fluid applications.
INCORRECT
Avoid this type of false flooded suction
CORRECT
SECTION 2 - INSTALLATION
Figure 2. Flooded Suction Pump Mounting
