Tsurumi PL Pumps - Manual (Page 13)

CAUTION !
1.9 Operation (cont.)
Pay careful attention to the water level while the pump is
operating. Dry operation may cause the pump
to malfunction.
Note: See section below, Operating water level, for the
water level necessary for operation.
Sharp bends in the hose, especially near its base, may
cause air pockets to form resulting in idle operation.
Lessen the degree of bending while continuing to operate
the pump.
Operating water level
Pump Model C.W.L.
3-PL 12-1/2" (315 mm)
FIGURE 1.3
DO NOT operate the pump below the
C.W.L. (Continuous running Water Level)
of 12-1/2" (315 mm) (min.). Failure to observe
this condition may result in damage to the pump,
electrical leakage or electrical shock.
Motor Protection System (Motor Protector)
The pump has a built-in motor protection system (Miniature
Protector). If the motor overheats, for reasons such as
the following, the pump will automatically stop operating
regardless of the water level, to protect the motor:
• Change in supply voltage polarity
• Overload
• Open-phase operation or operation under constraint
Note: ALWAYS determine the cause of the problem and
resolve it before resuming operation. Simply
repeating cycles of stopping and restarting will
result in damage to the pump. DO NOT continue
operation at very low lift, low water level, or while
the strainer is clogged with debris. Not only will
performance suffer, but also such conditions may
cause noise, heavy vibration, and malfunctioning.
C.W.L.
1-9
T SURUMI P UMP
WARNING !
1.10 Maintenance and Inspection
Regular maintenance and inspections are a necessity for
continued efficient functioning of the pump. If any
abnormal conditions are noticed, refer to
Section 1.12
Troubleshooting and take corrective
measures immediately. It is recommended that a spare
pump be kept ready in case of any problems.
Prior to inspecting
Detach the power cable from the receptacle or
terminals, after making certain the power supply
(circuit breaker, etc.) is turned off. Failure to follow this
precaution may result in a serious accident from
electrical shock or unexpected starting of the
pump motor.
1. Washing the pump
Remove accumulated matter from the surface of the
pump and wash it with clean water. Take special care
to remove any debris from the impeller.
2. Inspecting the pump exterior
Look for any cracked or broken parts, and make sure
the nuts and bolts are fastened tightly. Any cracked or
broken parts should be replaced immediately.
Note: Please consult with your nearest dealer or TSURUMI
representative regarding repairs.
PL 1-10
T SURUMI P UMP
PL