Do Not Operate Water-Cooled Motors Without Cooling Water - Siemens 1PH818 Operating Instructions & Installation Instructions

NOTICE
Non-periodic duty
In all of the operating modes, always operate the external fan according to DIN EN 60034-1.
For non-periodic operation, it is possible that the machine is thermally overloaded. This can
result in damage to the machine.
● In the case of extended non-operational periods, the fan should be in operation until the
● Use a suitable circuit to ensure that the external fan is appropriately operated.
NOTICE
EC fan control via an input signal
The fan motor can overheat if the external EC fan is operated at low fan speeds as a result
of the setpoint signal it receives.
● Monitor the motor using the integrated temperature sensors.
● Integrate the temperature monitoring into the interlocking circuit.
8.2

Do not operate water-cooled motors without cooling water

The motor must always be connected to the cooling water supply during operation.
NOTICE
Cooling water supply
If the cooling water supply fails or if the motor is operated for a short time without water cooling,
the motor will overheat. This can result in material damage or even a write-off.
Never operate the motor without the cooling water supply switched on. Monitor the
permissible water inlet temperatures.
Risk of burning from hot steam
If the cooling water supply fails, the motor will overheat. If cooling water runs into the hot
motor, hot steam suddenly forms, which escapes under high pressure. The cooling water
system can burst. This can result in death, serious injury or material damage.
Do not connect the cooling water supply until the motor has cooled down.
SIMOTICS M-1PH8 1PH818., 1PH822.
Operating Instructions 07/2016
machine has approximately reached the temperature of the coolant, see S2 duty type in
DIN EN 60034‑1.
WARNING
8.2 Do not operate water-cooled motors without cooling water
Operation
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