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Центробежные насосы
N4 65-125C/A
Инструкция по эксплуатации Страница: 12

CALPEDA N4 65-125C/A [12/44] Electrical connection

CALPEDA B-N4 32-200B/A [12/44] Electrical connection

between pump casing feet and baseplate.

First tighten the screws joining the foot and the

base and then, the screw between the foot and the

support. In this way, alignment will not be altered by

the support foot.

After alignment procedure, before star-

ting the pump attatch the coupling guard

(safety protection against

accidental con-

tact).

5. Electrical connection

Electrical connection must be carried

out only by a qualified electrician in

accordance with local regulations.

Follow all safety standards.

The unit must be properly earthed (grounded).

Compare the frequency and mains voltage with the

name-plate data and connect the supply conduc-

tors to the terminals in accordance with the name-

plate specifications and the operating instructions

(if available) of the motor.

With motor power rating ≥ 5,5 kW, avoid direct

starting. Provide a control panel with star-

delta starting or an other starting device.

Install a device for disconnection from the mains

(switch) with a contact separation of at least 3 mm

on all poles.

Install an overload pro

tection device appropriate

for the rated current of the pump.

6. Starting

ATTENTION: never run the pump dry - not

even for a short trial run.

Start the pump after filling it completely with liquid.

When the pump is located above the water

level (suction lift operation, fig. 4) or with a positi-

ve suction head which is too low (less than 1 m)

to open the non-return valve, fill the suction pipe

and the pump through the priming hole (fig. 8).

Replace threaded plug after each operation.

When the liquid level on the suction side is

above the pump (inflow under positive suction

head), fill the pump by opening the suction gate

valve slowly and completely, keeping the delivery

gate valve open to release the air.

Close the delivery gate valve completely, and check

the pressure of the suction head to make sure the

maximum final pressure does not then exceed 10 bar.

Start the pump with the delivery gate valve clo-

sed. Then slowly open the discharge gate valve and

proceed to regulate the pump duty point within the

limits indicated on the nameplate.

Never run the pump for more than five

minutes with a closed gate valve.

Make sure the direction of rotation is as shown by

the arrow on the pump casing. If rotation is in the

opposite direction disconnect electrical power and

reverse the connections of two phases.

6.1. Stopping

Close the delivery gate valve if a check valve is

not fitted.

Close the suction gate valve if a foot valve is not fitted.

Switch off the motor.

Periodical checks and maintenance

Make sure the pump operates in conformity with

the range of specified levels of performance and

that absorbed current indicated on the nameplate

is not exceeded.

Check the alignment of the coupling (see section 4.).

7.1. Pumps with mechanical seal

Mechanical seals do not require maintenance.

Except for possible initial leakage after the first

start-up, the mechanical seal on the shaft must

function without any loss of liquid.

Do not run the pump when dry.

When a leak occurs and gradually increases, the

seal must be replaced.

Replacing the mechanical seal (see section 8).

Make sure that the spring of the new seal has a

clockwise winding (when viewing the seal from

the stationary part) to conform with the direction

of rotation of the shaft.

Make sure that all the parts which the seal comes

into contact with are clean and that there are no

cutting edges or burr on the chamfered edges

where the elastic seal rings are fitted in the sea-

ting of the fixed part and on the shaft or shaft

sleeve.

ATTENTION: never allow seal rings in EPDM

(Ethylene-Propylene-Diene Monomer) to

come

into contact with oil or grease. To make

assembly easier, lubricate the seatings and seal

rings with water or other liquids compatible with

the material in which the seal rings are made.

Care must be taken to avoid damaging the seal

surfaces by impact.

4.93.141

Fig. 8 Filling.

Содержание

Похожие устройства

between pump casing feet and baseplate First tighten the screws joining the foot and the base and then the screw between the foot and the support In this way alignment will not be altered by the support foot A After alignment procedure before star ting the pumpattatch the coupling guard safety protection against accidental con tact 5 Electrical connection A Electrical connection must j out only by a qualified accordance with local regulations Follow all safety standards be carried electrician in The unit must be properly earthed grounded Compare the frequency and mains voltage with the name plate data and connect the supply conduc tors to the terminals in accordance with the name plate specifications and the operating instructions if available of the motor With motor power rating 5 5 kW avoid direct starting Provide a control panel with star delta starting or an other starting device Install a device for disconnection from the mains switch with a contact separation of at least 3 mm on all poles Install an overload protection device for the rated current of the pump appropriate 6 Starting___________________________ ATTENTION never run the pump dry not even for a short trial run Start the pump after filling it completely with liquid When the pump is located above the water level suction lift operation fig 4 or with a positi ve suction head which is too low less than 1 m to open the non return valve fill the suction pipe and the pump through the priming hole fig 8 Replace threaded plug after each operation Fig 8 Filling When the liquid level on the suction side is above the pump inflow under positive suction head fill the pump by opening the suction gate 12 valve slowly and completely gate valve open to release the air keeping the delivery Close the delivery gate valve completely and check the pressure of the suction head to make sure the maximum final pressure does not then exceed 10 bar Start the pump with the delivery gate valve clo sed Then slowly open the discharge gate valve and proceed to regulate the pump duty point within the limits indicated on the nameplate A Never run the pump for more than five minutes with a closed gate valve Make sure the direction of rotation is as shown by the arrow on the pump casing If rotation is in the opposite direction disconnect electrical power and reverse the connections of two phases 6 1 Stopping Close the delivery gate valve if a check valve is not fitted Close the suction gate valve if a foot valve is not fitted Switch off the motor 7 Periodical checks and maintenance Make sure the pump operates in conformity with the range of specified levels of performance and that absorbed current indicated on the nameplate is not exceeded Check the alignment of the coupling see section 4 7 1 Pumps with mechanical seal Mechanical seals do not require maintenance Except for possible initial leakage after the first start up the mechanical seal on the shaft must function without any loss of liquid Do not run the pump when dry When a leak occurs and gradually increases the seal must be replaced Replacing the mechanical seal see section 8 Make sure that the spring of the new seal has a clockwise winding when viewing the seal from the stationary part to conform with the direction of rotation of the shaft Make sure that all the parts which the seal comes into contact with are clean and that there are no cutting edges or burr on the chamfered edges where the elastic seal rings are fitted in the sea ting of the fixed part and on the shaft or shaft sleeve ATTENTION never allow seal rings in EPDM Ethylene Propylene Diene Monomer to come into contact with oil or grease To make assembly easier lubricate the seatings and seal rings with water or other liquids compatible with the material in which the seal rings are made Care must be taken surfaces by impact to avoid damaging the seal

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