Operation; Maintenance - Franklin Electric MH Series Owner's Manual

Operation

Priming (Figure 4)
The motor should not be started before pump is primed. To prime the pump, fill the pump case
and suction pipe completely with water. Install discharge and suction fittings securely to ensure
there are no system leaks. Use Priming Port.
Close all system outlets, then slightly crack one system outlet to allow for excess air to bleed
from the plumbing system. Start the pump. Water will start pumping in a few minutes; the time
is dependent on the distance to the water source. If after a few minutes of running you do not
get water, repeat priming process as all air was not discharged from the pump. Once the pump
is operating, open system outlets slowly and let pump operate until water runs clear. No further
priming should be necessary unless: the pump is drained for repair or storage, there is a leak in
the suction line plumbing, or there is a failure of the system's foot or check valves.
NOTE: Three-phase units are designed to run in a counter-clockwise manner when viewed from
the pump end. Improper rotation can result in low performance or hydraulic failure.
Figure 4 - Priming Shallow Well with Priming T
MOTOR
s
NOTICE
!
Ensure motor is operating in a clean, dry environment.

Maintenance

Lubrication
The pump requires only water for lubrication and must never be run dry.
s
CAUTION
!
Running the pump dry may cause damage to the pump and system components.
MH Series Horizontal Multi-stage Pump
Clean Water
Pump should not be primed until plumbed together
Pipe Plug
Priming Port
9