AEG Electrolux EHG 679 B Instrucciones de operaciones descargar pdf (Pagina 11)

Operation

2.3.2 Pump with Three-Phase AC Motor

TRIVAC-B pumps with a three-phase motor are supplied

without accessories for electrical connection. They must

be connected via the appropriate cable, and a suitable

motor protection switch. Set the switch in accordance

with the rating on the motor nameplate.

Fig. 8 shows the connection for pumps with 230/400 V,

50 Hz motors. Please also observe the motor wiring dia-

gram in the junction box and the information given on the

nameplate of the motor.

After connecting the motor and after every

time you alter the wiring, check the direction

of rotation. To do so, briefly switch on the

motor and check whether a suitable cover

(e. g. a blank flange) is sucked on at the

intake port. If not, interchange two phases

of the connection.

Observe the direction arrow on the coupling

housing.

2.4 Start-up

Each time before starting up ensure that the oil level is

visible in the oil level glass.

For pumps with 3-phase motors, check the direction of

rotation before starting the pump for the first time and

after each change in the electrical connection (see Sec-

tion 2.3.2).

On initial start-up, after prolonged idle periods or after an

oil change, the specified ultimate pressure cannot be

attained until the oil is degassed. This can be done by

running the pump for approx. 30 min. with the intake line

closed and the gas ballast valve (7/5) open.

Before starting the pump ensure that the

pump and the fitted accessories meet the

requirements of your application and that

safe operation can be guaranteed.

Avoid exposure of any part of the body to

the vacuum. There is the danger of injury.

Never operate the pump with an open inta-

ke port. Vacuum connections as well as oil-

fill and oil-drain openings must never be

opened during operation.

The safety regulations which apply to the

application in each case must be observed.

This applies to installation, operation and

during maintenance (service) as well as

waste disposal and transportation.

The standard pump is not suited for pum-

ping of hazardous gases or vapours.

Our technical sales department is available for further

advice in these matters.

GA 01.202/9.02 - 03/96

Attention

Fig. 8 Connection diagram for TRIVAC-B with 50 Hz 3-phase motor

Delta connection

Star connection

Caution

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 27 28

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AEG Electrolux EHG 679 B Instrucciones de operaciones Pagina 11

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