Starting Up; Precautions; Maintenance And Cleaning - DAB PUMPS ALM 200 Instrucciones Para La Instalación Y El Mantenimiento

7.5 Single-phase motors are provided with thermal overload protection and may be connected directly to the mains.
7.6
Three-phase motors must be protected with special remote-control motor-protectors calibrated for the current shown on the plate.
7.7 In systems where twin pumps are fitted, provide separate wiring and switches for each pump so as to ensure continuous
service.
8.

STARTING UP

8.1
Before starting up you must fill the system with water and bleed the air. Bleed the residual air from the pump body
through the bleeding cock provided (not present on version ALM 200 – ALP 800) until only water comes out (Fig. E).
This ensures that the mechanical seal is well lubricated and that the pump immediately starts to work regularly. Dry
operation, even for brief periods, causes irreparable damage to the mechanical seal.
8.2 Switch on the power and, on three-phase versions, check that the motor is turning in the right direction, that is clockwise
when viewed from the fan side, Fig. F. Otherwise invert any two phase leads, after having disconnected the pump from
the mains.
8.3 With the pump running, check the supply voltage at the motor terminals, which must not differ from the rated value by
+/- 5% (Fig. G).
8.4
With the unit at regular running speed, check that the current absorbed by the motor does not exceed the value on the
data plate.
9.

PRECAUTIONS

9.1
The electropump should not be started an excessive number of times in one hour. The maximum admissible value is as
follows:
SINGLE-PHASE MOTORS
THREE-PHASE MOTORS UP TO 5.5 HP
THREE-PHASE MOTORS FROM 7.5 TO 60 HP
9.2 DANGER OF FROST: Fig.H
Do not close the drainage cap until the pump is to be used again.
When restarting after long periods of inactivity it is necessary to repeat the operations described above in the
paragraphs "WARNINGS" and "STARTING UP".
10.

MAINTENANCE AND CLEANING

10.1
10.2
10.3
10.4 In normal operation, the pump does not require any kind of maintenance. However, from time to time it is advisable to
check the plate data, which will enable you to have advance warning of any faults or wear.
10.5 On some models which are provided with a grease nipple, the motor ball bearings must be greased every 3000 working
hours; this interval may be reduced in the case of heavy duty applications. So top up with grease for high temperatures
through the grease nipples provided.
10.6 After any operation involving the removal of the motor head from the pump body, it is advisable to change the
O-ring between the pump body and the support.
As well as being at high temperature and high pressure, the fluid in the system may also be in
the form of steam.
DANGER OF BURNING.
It may be dangerous even to touch the pump or parts of the system.
Check that the leakage of liquid does not damage persons or things, especially in plants that use
hot water. The system must be drained only once the fluid temperature has reached
environment temperature.
As well as being at high temperature and high pressure, the fluid in the system may also be in
the form of steam.
DANGER OF BURNING.
It may be dangerous even to touch the pump or parts of the system.
The electropump can only be dismantled by competent skilled personnel, in possession of the
qualifications required by the legislation in force. In any case, all repair and maintenance jobs must
be carried out only after having disconnected the pump from the power mains. Ensure that it cannot be
switched on accidentally.
If possible, keep to a maintenance schedule: expensive repairs or machine down times can be avoided
with a minimum expense. During maintenance schedule discharge the condensate, if necessary
present into the motor, through the hole, removing the exhaust port plug no (electropumps with IP55
Degree of motor protection only)
If the liquid has to be drained out maintenance, ensure that the liquid coming out cannot harm
persons or things, especially in using hot water.
The legal requirements on the disposal of any harmful fluids must also be complied with.
ENGLISH
MAXIMUM NUMBER OF STARTS PER HOUR
17
30
20 ÷ 30
5 ÷ 10