Wilo -Atmos BST Instrucciones De Instalación Y Funcionamiento página 49

9.3 Switching off
9.4 Operation
Installation and operating instructions • Wilo-Atmos BST • Ed.01/2023-07
• Close the shut-off device in the discharge line.
NOTICE
If a non-return valve is installed in the discharge line, and there is coun-
terpressure, the shut-off device can remain open.
CAUTION
Risk of damage due to incorrect handling!
When switching off the pump, the shut-off device in the inlet pipe must
not be closed.
• Switch off the motor and allow it to coast down completely. Ensure the coasting is
smooth.
• For longer downtimes, close the shut-off device in the inlet pipe.
• For longer periods of non-use and/or danger of freezing, drain the pump and secure it
against freezing.
• After removing the pump, store it in a dry and dust-free place.
NOTICE
The pump must always run smoothly and vibration-free and must not be
operated in conditions other than those specified in the catalogue/data
sheet.
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!
WARNING
There is a risk of burns or freezing upon coming into contact
with the pump/system.
Depending on the pump and system operating conditions (fluid temper-
ature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• Allow the system and pump to cool down to room temperature!
• Always wear protective clothing, safety gloves and safety glasses
when working.
The pump can be switched on and off in different ways. This depends on the different op-
erating conditions and the degree of automation of the installation. Observe the following
points:
Stop procedure:
• Prevent return flow to the pump.
• Do not operate for too long with the volume flow being too low.
Start procedure:
• Make sure that the pump is completely filled up.
• Ensure a continual flow to the pump with a sufficiently large NPSH.
• Avoid that insufficient counter pressure leads to a motor overload.
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