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5

5.  MAINTENANCE

WARNING

Pumps  do  not  require  routine  maintenance  provided  the  following 
precautions are taken:-

Ÿ

Check that the foot valve is clean and unrestricted at regular intervals.

Ÿ

If the pump is to remain unused for long periods of time it is advisable to 
empty it completely, rinse it with clean water and store in a dry place.

Ÿ

If the shaft does not run freely, release it using a screwdriver by inserting it 
in the special slot on the rear of the pump shaft. If this is not sufficient to 
solve the problem remove the pump body by unscrewing the relevant 
mounting bolts and clean it thoroughly to remove any encrustation.

Never carry out any work on the pump without having first 
disconnected from the mains supply.

Serious damage will occur if a pump is not properly primed 
and runs without water.

4)  PRIMING

WARNING

The pump must be primed before operation. To do this completely fill the 
pump housing with clean water through the priming plug before switching it 
on. 
When full replace the priming plug and start the pump checking there is a 
steady flow at the pump outlet. The pump should be primed whenever it has 
not been used for a long period of time or when air has made its way into 
the system.

Summary of Contents for DB

Page 1: ...DB DBH Horizontal Multistage Pumps Installation Operating Manual DB2 DB4 DB8 DB12 DBH...

Page 2: ......

Page 3: ...PUMP SPECIFICATIONS 1 1 2 INSTALLATION 2 ELECTRICAL CONNECTIONS 3 3 PRIMING 4 4 MAINTENANCE 5 4 INDEX Davis Shirtliff Ltd 2018 Contents herein are not warranted TROUBLE SHOOTING 6 5 WARRANTY 7 6...

Page 4: ...5 30 25 40 45 50 DB 8 50 DB 8 30 1 2 3 4 5 6 7 8 9 10 HEAD m 20 2 4 6 8 10 12 14 5 0 10 15 35 30 25 40 45 50 55 DB 12 50 DB 12 30 DB2 DB4 DB8 DB12 3 FLOW RATE m hr 3 FLOW RATE m hr 3 FLOW RATE m hr Co...

Page 5: ...rated motor unit are of monoblock design and particular attention has been paid to quietness and smooth operation MOTOR The pump is coupled to a totally enclosed fan cooled single phase squirrel cage...

Page 6: ...on a solid flat surface ensuring the shaft is in a horizontal position Ensure that the diameter of the suction pipe is at least the size of the pump suction inlet If the suction depth exceeds 4 meters...

Page 7: ...a thermal overload fitted in the motor windings Three phase motors should be installed with remote starter WARNING If there is negative suction i e the pump is above the suction water level the suctio...

Page 8: ...problem remove the pump body by unscrewing the relevant mounting bolts and clean it thoroughly to remove any encrustation Never carry out any work on the pump without having first disconnected from t...

Page 9: ...imed Clean foot valve Excessive suction height Air in suction Clogged foot valve Delivery head exceeds pump capacity Reduce delivery head Specify different pump Flow rate insufficient Reduce suction h...

Page 10: ...liability of Davis Shirtliff hereafter called the Company in respect of any defect or failure of equipment supplied is limited to making good by replacement or repair at the Company s discretion defec...

Page 11: ...8 Also proof of purchase including the purchase invoice must be provided for a warranty claim to be considered...

Page 12: ...INS179E 05 18...

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