HYDROO 20HQX-1, Руководство по эксплуатации, Страница: 7 / 9

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IX. maINtENaNcE
Before maintenance, shut off the power supply. Because it is dangerous that the pump
would start abruptly when in automatic mode.
1.- Important notice for daily checking.
1) If pressure, voltage, vibration, noise is different from that of normal, it predicates
there is something wrong with the pump. Stop the pump and repair it at once. In
addition, it is suggested to use spare pump to prevent from sudden case.
2) The max temperature of bearing is 80°C . If the motor shell can be tou¬c hed by
hand, it is normal, or it should be checked after stop.
3) The normal leakage of mechanical seal is 3m1 per hour. When running, if leakage is
bigger than this and bigger and bigger, stop it at once.
4) In the case of correct installation and pipe work, if there is strong vib-ration when
running, it indicates that pump receives big force from pipe or the base screws are
loose. Stop and check at once.
2.- When pump running, please refer to the following.
1) If the pump running exceeds the nominal pressure(head), it will ove-rburden.
Therefore, the motor will be burned.
Important notice: Must not close the discharge valve when running.
2) The metal sound will be heard when pump running in high pressure. This is the
character of the gas-liquid pump, not the malfunction.
3) The pump should not be started frequently. For the pump with motor power less
than or equal to 4kw,the number of startup shall not more than 100 per hour. For
the pump with motor power more than 4kw,the number of startup shall not more
than 20 per hour. If the startup is too frequent,the device should be checked and
adjusted to reduce the start-stop frequency.
4) When power cut, must switch off the pump to prevent from pump ru-nning
suddenly when power is supplied, which will be dangerous.
3.- The storage is as follows when the pump stop working for a long time.
1) In winter, if pump stops, must take anti-frozen steps and drain the wat¬er in pump
to prevent pump casing from broken.
2) Spare pump should be run periodically, so it is ready for work.
4.- Wearing parts of pump
1) The pump parts should be replaced if the following case happened.
Note: The above normal replacement period is the period of replacement for normal usage.
When ordering spare parts, please advise the pump model indicated in the pump name plate.
X. aSSEmBlE aND DISaSSEmBlE
Please follow up the following steps to disassemble and assemble.
1.- Disassemble
1) Disassemble pump cover screws, take apart pump cover;
2) Loose impeller fixing screws, take the impeller from the shaft. If the impeller is
difficult to take it out, fit the screws to two screw holes, pull the impeller out;
3) Take apart thekey from shaft, wipe off the fixing trail;
4) Take apart the rotating ring of mechanical seal;
5) Loose and take off the screws which are fixing the volute to the pump station
flange, take apart the volute. The stationary part of mechanical seal can also be
taken apart with the volute. Note that not scratch the face of m¬echanical seal.
2.- Assemble
Reverse the disassemble steps can assemble a pump. But take note of the following.
1) The spring hook of mechanical seal should be in the mechanical seal fixing groove
of the impeller. The rubbing part of mechanical seal should be cleaned by clean and
soft cloth. Be careful not scratch the rubbing face;
2) Impeller should be fit between casing and cover. In addition, before disassemble,
wipe off the fixing trail. The clearance between impeller and casing is adjusted
as follows.
Fit the impeller on the shaft, push it toward to the casing until it touches the casing.
Tight the impeller fixing screws a little, then hammer the shaft point slightly, the
impeller is moved by reverse force. When the clearance is adjusted correctly, fit
the cover, rotate the shaft. If the shaft can rotate s¬moothly, tighten the impeller
fixed screws.
3) Replace 0 ring, gasket
4) Replace all wore out parts.
5) The screws should be tightened evenly, do not tighten one and then tighten
another one.
6) After installation finished, rotate the shaft, it should not be choked or loose or tight.
Wearing parts Standard of replacement Normal replacement period
Mechanical seal Leakage exceeds required amount Once a year
Bearing There is abnormal noise or grease leaks Once in two or three years
Gasket or 0 ring When routing checking Once in two or three years