Wilo -Atmos BST Instrucciones De Instalación Y Funcionamiento página 48

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9.2 Activation
48
DANGER
Danger of personal injury and material damage due to ex-
tremely hot or extremely cold pressurised fluid!
Depending on the temperature of the fluid, when the venting device is
opened completely, extremely hot or extremely cold fluid may escape in
liquid or vapour form. Fluid may shoot out at high pressure depending on
the system pressure.
• Always exercise caution when opening the venting device.
1. Close shut-off device at the outlet.
2. Fill pump via the suction pipe, whereby the shut-off device at the inlet is to be fully
opened.
3. Deaerate pump via venting screw in pump housing until only fluid appears.
4. Close venting screw.
NOTICE
• Always keep to the minimum pressure!
• To avoid cavitation noises and damage, a minimum inlet pressure must be guaranteed at
the suction port of the pump. The minimum inlet pressure depends on the operating
situation and the pump's duty point. Accordingly, the minimum pressure must be de-
termined.
• The main parameters for defining the minimum inlet pressure are the NPSH value of the
pump at its duty point and the vapour pressure of the fluid.
1. By briefly switching on, check whether the direction of rotation agrees with the arrow
on the fan cover. If the direction of rotation is incorrect, proceed as follows:
• For direct starting: Swap two phases on the motor terminal board (e.g. L1 for L2).
• For Y-Δ starting:
Swap the thread start and thread end of two windings on the motor terminal board (e.g.
V1 for V2 and W1 for W2).
CAUTION
Even brief dry running will destroy the mechanical seal!
Only carry out the direction of rotation monitoring after the system is
filled!
• The unit may only be switched on when the shut-off device on the discharge side is
closed! Only after full speed has been reached may the shut-off device be slowly
opened and be adjusted to the duty point.
The unit must run smoothly and free of oscillation.
The mechanical seal ensures that a seal will not leak and requires no special setting. Should
there be a small leakage at the beginning, it will stop when the initial inlet phase of the
gasket is over.
After the operating temperature has been reached and/or in the event of leaks in the pump
housing, re-tighten the hexagonal screws with the set switched off.
DANGER
Danger of death due to lack of protective devices!
Due to missing protective devices of the terminal box or near the coup-
ling/motor, electric shock or contact with rotating parts can lead to life-
threatening injuries.
• Immediately after the conclusion of all work, all the provided safety
and protection equipment items must be properly installed and put
into operation!
Installation and operating instructions • Wilo-Atmos BST • Ed.01/2023-07