HYDROO MDROO Series, Operation Manual

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IX. DISaSSEMBlE aND aSSEBlE
The following steps should be done by the professional staff.
1. DIASSEMBLE
1) Screw off 8 socket head cap screws connecting the casing and motor, take off
the bracket, casing and O-ring for casing. If necessary, take off the diffuser and
O-ring for impeller.
2) Hold the pump shaft from the fan blade end using 2 mm strap clamp, release the
nut for impeller with socket wrench, then take off the impeller.
3) Take off the travelling ring of mechanical seal and be careful not to damage it.
4) Take off the seal base plate and stationary ring of mechanical seal. If necessary,
disassemble the stationary ring of mechanical seal from the seal base plate. Be
careful not to scratch the friction surface of mechanical seal.
2. ASSEMBLE
1) Clean the mountain ahole of the seal stationary ring on the seal base plate and
press in the seal stationary ring by hand.
2) Shaft extension of the motor shall be upwards. Encase the pump shaft into the
seal base plate. Be careful not to make the pump shaft knock against the stationary
ring of mechanical seal.
3) Encase the stationary ring of mechanical seal, aand be careful to clean the friction
surface firstly.
4) Hold the pump shaft by strap clamp, fit impeller, impeller cover, tighten nut.
5) Mount the pump seal ring on the seal base plate.
6) Mount the diffuser, neck ring for impeller on the casing and make th axial
clearance of the neck ring as small as possible and move flexibly.
7) Mount the casing on the motor flange. Make the discharge of the pump aligns
with the terminal box of the motor as well as ensure good match of the neck ring for
impeller with the casing.
8) Fasten the pump and bracket by screw. Turn the impeller from the suction inlet by
hand to ensure flexible running and without metal friction.
The acoustic noise emision is around 75 dB(A)
Before open the terminal box, plesae shut off the power supply to prevent
from power shock
VII. OPERaTION
1. Preparation before operation.
1) Check whether the foot bolts are connected firmly with each components.
2) Close the outlet valve and various meters, screw off the water inlet gag, fill in the
pump fully then tighten the casing cap again.
2. Star and run.
1) Start motor and confirm that the turning direction of the motor is identical with the
direction indicated by the arrow on the pump, then slowly open the outlet valve and
adjust it to required working condition. The flow rate shall be controlled within the
scope of over striking curve of the perfomance curve.
2) Check the fluctuation of outlet pressure gauge and the vibration of pump. When
confirmed that the liquid in the pump contains air, timely loosen air vent screw to
vent the air.
3) Observe whether ther is noise during operation. in case of abnormal noises, stop
stop the pump ans inspect it timely to solve it.
3. Stop the pump.
Slowly close the outlet valve and various meters, then cut off the power.
VIII. MaINTENaNCE
1. It is the foreshadow of accident when pressure, voltage, vibration, noise, etc. has
large difference with normal condition. Immediately stop operation and check it.
2. The temperature of the motor bearing cover should not exceed 70 degrees.
3. Under normal condition, the leakage of mechanical seal shall not exceed 3ml per
hour. After normal operation, in case water leakage exceeds this stipulation and
increases gradually. please immediately stop the pump and inspect it.
4. In case the pressure of the pipeline on the pump is too large or foundation bolts are
loose, intense vibration will generate during operation.
5. Strictly prohibit the operation without medium or not evacuating the air. Otherwise, it
will result in the damage of mechanical seal.
6. Strictly prohibit the operation beyond the upper limit of stipulated flow rate (refer to
perfomance curve) to avoid the burnt of the motor.
7. The pump shall not be started frequently. Starting times per hour shall not exceed 40
times at best.
8. The pump shall not be operated with closing the valve for a long time.
9. When power is off, the power supply shall be cut off to prevent the danger caused
by sudden start of the pump when switch it on.
10. In case of freezing, after stopping the pump, the liquid in the pump shall be
discharged.
11. Stand-by pump shall be operated periodically to make it available.
12. Whe serve the pump, power supply should be switch off.