4.6 Interlock circuit for anti-condensation heating
If the anti-condensation heating is operated while the machine is running, this can increase
the temperatures inside the machine.
● Install an interlock circuit that switches off the anti-condensation heating once the main
machine is switched on.
● Only switch on the anti-condensation heating after the machine has been switched off.
See also
Switching on with the anti-condensation heating active (Page 78)
4.7 Space requirements
Ensure that there is sufficient space where the motor is to be installed so that when required,
the air-to-water exchanger can be removed and installed.
4.8 Noise emission
Excessive sound pressure levels can lead to hearing impairment or hearing loss.
● When assessing the noise level of the system, make due allowance for the noise emissions
from the machine.
● If necessary, take suitable noise protection measures for personnel.
4.9 Voltage and frequency fluctuations during line operation
If nothing else is stamped on the rating plate, the permissible voltage fluctuation is ±5 % and
the permissible frequency fluctuation is ±2 %, corresponding to range A in IEC / EN 60034‑1.
Permissible fluctuations that go beyond this are stamped on the rating plate.
Under operating conditions a machine may sometimes have to be operated outside the limits
of range A.
● Exceeding the permissible tolerances for voltage and frequency can lead to an
impermissibly high temperature rise of the winding. This can result in long-term damage to
the machine.
● Limit exceptions of this sort with regard to the values that arise, how often, and for how long
they occur.
● Where possible and within a reasonable time take corrective actions such as reducing the
power. Such actions can avoid thermal ageing leading to a reduction in the service life of
the machine.
Preparations for use
4.6 Interlock circuit for anti-condensation heating
SIMOTICS HV M 1RN76308PR900CG0-Z
Operating Instructions 07/2018 25
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