Alarko ALD 400 Series, Operating Manual

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TECHNICAL SPECIFICATIONS / ALD and ALDF
The motors of all types are 3-phase, 380 V, 50Hz.
It is possible to turn the connection type of the water boosters which have 1, 1.5, 2, 3
or 4 HP motors to triangle and to operate in single phase network with the addition of
suitable capacitor. In this case, there is no difference between the performance
obtained and the performance of a star-connected motor fed from a three-phase
network.
Protection against waterless running is done with float switch.
Water boosters should be used with a pressure compensating tank. Tank coupling
with pump assembly can be easily done with flexible connection hose.
By means of sequence-controlled operation, the pumps are activated in sequence-
controlled manner to keep the set factory pressure and desired water flow rate
constant, and they are deactivated in sequence as usage decreases. First
commissioning pump changes automatically after each use. Thus, the service life of
the motors and pumps is equalized.