DesiCool
Figure 5.1 Checking the direction of rotation
The items below concern recirculated systems:
5. Start the pump and check the direction of rotation by touching the rubber ring with a screwdriver.
Viewed from above, the motor should rotate clockwise. If it rotates in the wrong direction, switch two of
the phases.
6. Adjust the bleed-off valve to correspond to the calcium level in the water.
NOTE!
The level of the water in circulating water coolers is very important. If the level is consistently too low,
cooling performance can be drastically impaired.
5.3 Starting up
After carrying out all the checks listed above, the unit can be put into operation and the following points
checked:
a) Measure the tension of the network and the intensity absorbed by each motor and compare them to the
figures on the motor identification plate.
NOTE!
The power of the motors in our units is calculated with a predetermined safety coefficient. Compare the
theoretical intensity with the intensity absorbed by the motor of the unit while it is operating.
b) The system’s external static pressure must comply with the order specifications. Non-conformance will
lead to variations in the air flow.
The flow rate varies according to the rotation speed of the fan, the pressure according to the square of the
rotation speed and the absorbed power according to the cube of this speed. If the system pressure is lower
than the values estimated, the flow rate will increase together with the absorbed power, which creates a risk
of overloading the motor. This is especially important for forward curved fans. For backward curved fans
the absorbed power curve follows almost exactly the rotation speed curve.
NOTE!
Compliance with all these points is a condition of the guarantee.
TEN-DSC-D1401
Commissioning
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Summary of Contents for DesiCool
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