INSTRUCTION MANUAL EBARA Self Priming Pumps SQPB

INSTALLATION

Location
(1) This pump should be installed indoors. If it is to be used outdoors, some type of roof or covering will be required to protect the pump from the weather.
(2) Install in a well-ventilated area with low humidity. Ambient temperature should be 40o C or less.
(3) Install where inspection and maintenance procedures can be easily performed.

(4) Provide a suitable enclosure to prevent entry of unauthorized persons.
(5) Install pump as close to water source as possible. Suction height (height from surface of liquid to center of pump) should be as low as possible, and suction piping should be short.
Suction head should be less than 6 meters. To minimize suction piping loss, excessive use of elbows and valves should be avoided.

Piping

(1) Use adequate support for suction and discharge piping to avoid excessive piping load on pump.
(2) The end of the suction piping should be submerged to a depth of at least twice the diameter (D) ot the piping, and should be at a distance between 1 to 1.5 times the diameter of the piping from the bottom of the pit.
(3) Install a strainer at the end of the suction piping to block the entrance of foreign matter.
(4) Install an air-release valve in piping to prevent the formation of air pockets due to construction. Note, however, that an air-release valve must not be installed where pressure may drop below atmospheric pressure since the valve may suck in air instead of expelling it.
(5) Suction piping should be inclined upward (over 1/100) in relation to the pump to prevent formation of air pockets. Pipe joints must be tight so that there will be no possibility of air leakage.
(6) Keep suction piping as short and straight as possible. Do not attach a sluice valve.
(7) A check valve must be installed between the pump and the discharge valve in the following cases: when suction piping is long; when actual head is high; when pump is automatic; when water is being pumped to pressure tank; and when two or more pumps are in parallel operation.

(8) If there is a bend or joint in the piping between the check valve and the pump, air pockets may develop. In such a case, install an air release valve just below the check valve. As water will be discharge from the air–release
valve after priming has been completed, be sure to close air-release valve.
(9) To reduce effect of water hammer install such a device as a quick-closing check valve.
(10) An example of piping installation is shown in fig.1

Attaching V-Belt
(1) Refer to the catalogue for the respective speeds of the driver and pump pulleys to determine their appropriate size and the number of V-belts that will be required.
(2) Stretch a piece of string between the driver and pump pulleys. The string should be in a straight line as shown in Fig. 2.
(3) As pump must rotate counterclockwise viewed from drive shaft, couple driver so that belt tension is applied to lower portion.
(4) The belt should not be too tight or too loose. With a V-belt, allow for a slack of about 10 milimeters when the belt is depressed.
(5) Before beginning operation, rotate pulleys by hand to ensure that belt will stay in place.
(6) If the belt slips or makes an abnormally loud sound, adjust tension.
(7) As the belt may stretch and slip or come off when the motor is continuously operated for an extended period of time, pump and driver
may need occasional repositioning.
Attach a belt cover to prevent accidents.

OPERATION

Before starting
(1) Turn pump by hand to check for smooth rotation. If movement is sluggish or uneven, components inside the pump may be rusted or the packing may be too tight.
(2) Operate the motor without the V-belt to check rotation direction. The pump should rotate in a counterclockwise direction when viewed from the pulley side. Attach the V-belt after you have completed the rotation direction
check.
(3) Prime the pump. Operating the pump without priming will cause breakdown.
(4) Rotate the pump by hand when priming to remove internal air from casing.

Operation
(1) When the end of the discharge piping is exposed and a discharge valve is installed, keep the valve open to allow air to escape. If an air-release valve is installed, keep it open to allow air to escape.
(2) Turn operation switch on and off two or three times to check operating condition. Attach Vbelt cover after operation check has been completed.
(3) If no water is pumped up within 10 minutes after operation has begun, there may be malfunction. Stop the pump immediately and inspect pump and piping carefully.
(4) Check that pressure, current, vibration and noise (refer to Maintenance) are at normal levels. Both the pressure gauge and compound gauge cocks should be kept closed except at specified times. Leaving them open may lead to gauge malfunction.
(5) If there is no check valve on the discharge piping, close the discharge sluice valve slowly when stopping pump operation. Turn off operation switch after the sluice valve has been completely closed.
(6) Follow the procedures listed under Maintenance each time before beginning operation. Ensure that all conditions arenormal before starting pump operation.

Maintenance

Ensure that pump operation switch is off before making inspections; the pump may suddenly start if it is an automatic operation type.

Daily inspection

(1) Pressure or current variations, abnormal vibration or noise are signs of malfunction.
Refer to Troubleshooting and make necessary repairs as soon as possible. We recommend that you keep a record of daily operating conditions so that you will be able to detect early signs of trouble.
(2) The maximum allowable bearing operating temperature should not exceed 80 0 C. As long as the bearing frame is not too hot to touch with the hand there is no problem. Stop operation immediately an inspect if bearing
frame become too hot.
(3) Packing leakage should be kept to a steady drip or trickle (approximate 20ml/min) do not tighten excessively or unevenly or when pump is stopped.

Carefully observe the following points:
(1) Operating the pump for an extended period of time with the discharge valve closed will eventually cause pump components to be damaged.
(2) Frequent starting and stopping of the pump will eventually cause damage. Pump starting frequency should not exceed approximately 6 times per hour.
(3) Be sure to turn off operation switch in the event of a power failure. It is dangerous to leave the switch on as the pump will suddenly

Carefully observe the following
when the pump is to be stored or remains idle for any length of time.

(1) Water remaining inside an idle pump will freeze in cold weather her cause the pump casing to burst. Be sure to insulate pump or drain water completely.
(2) Operate any auxiliary pumps occasionally to maintain best usable condition.

Replaceable parts

(1) Replace parts indicated in following chart as necessary.

(2) Replaceable parts measurements for this pump are as follows:

Troubleshooting

TROUBLE	CAUSE	REMEDY
Motor does not start Motor makes abnormasound and will not start.	(1) Motor malfunction. (2) Power source malfunction. (3) Rotating parts in contact, rusted, burnt out.	(1) Repair motor. (2) Inspect, repair (3) Rotate by hand. Reassemble. Have repaired in specialist shop.
Does not prime automatically. Does not obtain specified discharge volume.	(1) Pump not primed for initial operation. (2) Sluice valve closed, half open. (3) Actual head greater than pump head. (4) Suction height too high for pump. (5) Discharge piping end not exposed. (6) Suction piping end not submerged. (7) Rotation direction reversed (8) Rotation speed low Wrong number of poles in motor. Voltage drop Belt not positioned correctly. Wrong size pulley (pump or driver). (9) Strainer clogged (10) Impeller clogged. (11) Piping clogged. (12) Air Suction. (13) Leak in discharge piping. (14) Excessive piping length in suction pipe. (15) Impeller worn (16) Impeller corroded (17) Excessive piping loss. (18) Cavitation (19) Excessive wear of moving parts. (20) Excessive space between impeller and side plate.	(1) Prime. (2) Open Valve. (3) Re-examine original plan. (4) Re-examine original plan. (5) Open discharge piping end. (6) Submerge suction piping end. (7) Check and rewire (8) Check with tachometer Check nameplate Check power source Readjust belt. Re-calculate pulley size. (9) Remove foreign matter. (10) Remove foreign matter. (11) Remove foreign matter. (12) Inspect and repair suction piping and shaft sealing. (13) Inspect, repair. (14) Re-examine original plan. (15) Check quality of liquid used and change (16) Replace impeller. (17) Re-examine original plan. (18) Consult specialist (19) Replace worn parts. (20) Adjust spacing to within 3 mm.
Water Discharge but then stops	(1) Insufficient priming. (2) Air suction. (3) Air pocket in suction piping. (4) Suction height too high for pump.	(1) Prime sufficiently. (2) Inspect, repair suction piping, shaft sealing. (3) Re-install piping. (4) Re-examine original plan.
Overloads	(1) Excessive rotation speed. Wrong number of poles in motor. Wrong size pulley (pump or driver) (2) Voltage drop, phase inbalance (3) Head low. Excessive volume flow. (4) Belt not pulling correctly. (5) Foreign matter clogging pump. (6) Packing too tight. (7) Bearing damaged (8) Rotating parts touching. Shaft bent. (9) Excessive liquid specific gravity, density.	(1) Check with tachometer. Check nameplate. Re-calculate pulley size. (2) Check power source (3) Partially close discharge valve. (4) Adjust belt (5) Remove foreign matter (6) Loosen packing (7) Replace bearing (8) Have repaired in specialist shop. (9) Re-examine original plan.
Bearing Overhead	(1) V-Belt too tight. (2) Bearing damaged (3) Excessive pump operation with valve closed.	(1) Adjust belt (2) Replace bearing (3) Stop operation with valve closed
Excessive vibration & noise	(1) Foundation not stable (2) Incorrect installation. V-belt not adjusted properly (3) Bearing damaged (4) Excessive volume flow (5) Discharge volume too flow. (6) Impeller clogged (7) Rotation direction reversed (8) Rotating parts touching, shaft bent. (9) Cavitation (10) Piping vibrating	(1) Repair foundation (2) Reinstall, adjust (3) Replace ball bearings. (4) Partially close discharge valve. (5) Operate as close as possible to specified flow level (6) Remove foreign matter (7) Check with arrow and rewire (8) Have repaired in specialist shop (9) Consult specialist (10) Improve piping
Water leak from shaft sealing	(1) Packing not inserted properly (2) Packing damaged (3) Shaft or sleeve worn	(1) Replace packing (2) Replace packing (3) Have Repaired in specialist shop.
Shaft sealing overheat	(1) Packing too tight. (2) Packing unbalanced	(1) Adjust (2) Adjust

Construction