EBARA 2 CDX - Manual (Page 3)

Model CDU, CDX, 2CDU, 2CDX Ebara End Suction Centrifugal / Two-stage Centrifugal
instructions and Operation
Ebara Fluid Handling
www.pumpsebara.com 3
(t) 803 327-5005 • (f) 803 327-5097 rev. 12/10
PaCKaGE CONTENTS
1. be sure all parts have been furnished and that nothing has been damaged in shipment.
2. The catalog lists all parts included with package. a packing list packed with pump, also lists contents.
3. OPEN PaCKaGES aND MaKE THIS CHECK bEFOrE GOING TO JObSITE.
PIPING – Pipes must line up and not be forced into position by unions. Piping should be independently supported near the
pump so that no strain will be placed on the pump casing. Where any noise is objectionable, pump should be insulated from
the piping with rubber connections. always keep pipe size as large as possible and use a minimum of fittings to reduce
friction losses.
SUCTION PIPING – Suction pipe should be direct and as short as possible. It should be at least one size larger than suction
inlet tapping and should have a minimum of elbows and fittings (5 to 6 pipe diameters of straight pipe before inlet is recommended).
The piping should be laid out so that it slopes upward to pump without dips or high points so that air pockets are eliminated.
The highest point in the suction piping should be the pump inlet except where liquid flows to the pump inlet under pressure.
The suction pipe must be tight and free of air leaks or pump will not operate properly.
DISCHarGE PIPING – Discharge piping should never be smaller than pump tapping and should preferably be one size
larger. a gate valve should always be installed in discharge line for throttling if capacity is not correct. To protect the pump from
water hammer and to prevent backflow, a check valve should be installed in the discharge line between the pump and gate valve.
ELECTrICaL CONNECTIONS – be sure motor wiring is connected for voltage being used. Unit should be connected to a
separate circuit. a fused disconnect switch or circuit breaker must be used in this circuit. Wire of sufficient size should be
used to keep voltage drop to a maximum of 5%.
Single phase motors have built-in overload protection. Flexible metallic conduit should be used to protect the motor leads.
PrIMING – The pump must be primed before starting. The pump casing and suction piping must be filled with water before
starting motor. remove vent plug in top of casing while pouring in priming water. a hand pump or ejector can be used for
priming when desired. When water is poured into pump to prime, remove all air before starting motor.
STarTING – When the pump is up to operating speed, open the discharge valve to obtain desired capacity or pressure.
WARNING! DO NOT ALLOW THE PUMP TO RUN WITH THE DISCHARGE VALVE TIGHTLY CLOSED. IF THE PUMP
RUNS FOR AN EXTENDED PERIOD OF TIME WITHOUT LIQUID BEING DISCHARGED, THE LIQUID IN THE PUMP CASE
CAN GET EXTREMELY HOT CAUSING SEVERE DAMAGE TO THE PUMP AND POSSIBLY CAUSE INJURY TO PEOPLE.
rOTaTION – all single phase motors are single rotation and leave factory with proper rotation. Three phase motors should
be checked to ensure proper rotation
FrEEZING – Care should be taken to prevent the pump from freezing during cold weather. It may be necessary, when there is
any possibility of this, to drain the pump casing when not in operation. Drain by removing the pipe plug in the bottom of the casing.
rOTarY SEaL – PrO STEEL pumps are fitted only with rotary seal. This seal is recommended for LIQUIDS free from abrasives.
LOCaTION OF UNIT – The pump should be installed as near to the liquid source as is practical so that the static suction
head (vertical distance from the center line of the pump to water level) is maximized, and so that a short, direct suction pipe
may be used. The capacity of a centrifugal pump is reduced when the unit is operated under a high suction lift. The piping
should be as free from turns and bends as possible, as elbows and fittings greatly increase friction loss. Place the unit so that
it is readily accessible for service and maintenance and on a solid foundation, which provides a rigid and vibration-free support.
Protect the pump against flooding and excess moisture.
rules for Safe installation and Operation