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2.3 The pump should be installed so that the
suction pipe is as short and the suction
as small as possible.
2.4 When draw liquid from the same level of the
pump suction inlet, please allow a downward
slope from the liquid source to the pump
suction inlet to avoid air sucked in. If it is to
pump liquid from a level lower than the pump
suction inlet, a foot valve must be fitted to
the end of the suction pipe.
2.5 Please select the pipe size specified in the
specifications. Smaller piping will cause
considerable pressure loss and affect pump
efficiency.
2.6 All piping joints must be completely tight.
Leakage in suction piping may result in the
loss of the suction capability. Leakage in
discharge piping may cause the "cycling" of
the pump.
2.7 Please do not allow any foreign objects
(chewing gum, dirt, and sand etc.) fall into
the pump or motor.
2.8 The pump lifting capacity is related to the
temperature of flowing liquid. Under normal
o
o
flowing temperature (20
C - 30
C), it will lift
up to 5M. At high temperature operation
o
(over 60
C), the pump must be installed at
the level lower than the liquid source or the
pump inlet pressure must be higher than 1
atmosphere (15 PSI).
2.9 It is extremely dangerous to run the pump
against a closed discharge valve, because it
will cause extremely high liquid flow
temperature and damage your pump. You
may connect a bypass/a drain to the
discharge pipe to allow a minimum liquid
flow through the pump.
2.10 Metal piping is recommended when the
operations require high lifting head or high
liquid temperature.
o
2.11 In systems with hot liquids (over 60
C), extra
caution should be exercised to prevent from
personal injury caused by escaping water.
3. Operation instructions
lift
3.1 For booster systems where the liquid level on
the suction side is above the pump inlet,
please remove the filling plug and let water
back flow to the chamber. For pumping from
tanks and wells where the liquid level on the
suction side is below the pump inlet, please
remove the filling plug and pour water
through the chamber. Be sure suction pipe
and pump are completely filled with liquid
and vented. Replace the plug after water is
filled.
3.2 Double check if the voltage and wiring
connection are correct before you switch on
the pump. Your pump should be operating
shortly.
3.3 If there is no discharge flow after a few
minutes, please turn off the pump and repeat
the Process of 3.1 Turn the pump on and off
several times until it is working normally.
3.4 When pump is working on normal condition,
measure the motor current and check it with
the nameplate value. If it exceeds the rated
value, please reduce the lifting capacity or
fully open the valve.
3.5 When pump is not in use for a period, it
should be drained by removing the priming
and drain plugs. For start up after long time
inactivity, please check if the impeller and
mechanical seal are free. If they are locked
up by sand, rust or something else please
clean them up.
Priming plug
Drain plug
Fig.2
~ 3 ~
4. CONSTRUCTION
1. MOTOR
6 .IMPELLER
2 .GASKET
7 .DIFFUSER
3 .MECHANICAL SEAL
8 .SHAFT SLEEVE
4 .C- RING
9 .IMPELLER
5 .SHAFT SLEEVE
10 .SHAFT SLEEVE
1
2
3
6
7
8
9
10
11
11 .LOCK NUT
12 .GASKET
13 .PUMP COVER
14 .BOLT
15 .PLUG
4
5
12
13
14
15
Fig. 3
~ 4 ~
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