LEYBOLD 970100V, Original Instruction Manual

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SV Neo D 16 – 25 - 40 – 65 Jan. 2018 31 / 51
Temperature Switch (on given variants only)
A temperature switch can be retrofitted on the pumps and is available as an
accessory.
It is a dry contact normally closed, tripping at 100 °C.
Hysteresis approx... 20 °C
The thermal switch can be connected in series with the motor protection relay.
Switching ratings
DC 3A/60V Max
AC 5A/25V Max
Make sure the pump restart will be possible only by a voluntary action after
having solved the overheating cause.
Temperature Sensor PT100 (on given variants only)
A temperature sensor type PT100 can be placed on the vacuum generator
close to the exhaust valves. The temperature sensor monitors the pump
temperature. See next page for threshold values.
Make sure the pump restart will be possible only by a voluntary action after
having solved the overheating cause.
Oil level Switch (on given variants only)
An oil level switch can be retrofitted on the pumps and is available as an
accessory.
The pump must be switched off and the pump and oil level checked
immediately if the oil level is too low.
To avoid false alarms it is recommended to use a timer of 20 seconds on the
switch output. If the default remains longer than 20 seconds, the pump must be
switched off.
Switching ratings
DC 1A/60V Max
AC 0,5A/25V Max
Exhaust filter over pressure switch (on given variants only)
An overpressure switch can be retrofitted on the pumps and is available as an
accessory. The pump must be switched off and the pump, exhaust line and
exhaust filters checked or changed immediately if the pressure in the oil casing
is too high.
To avoid false alarms (e.g. at cold pump start) it is recommended using a timer
set to 20 seconds on the switch output.
The exhaust filter switch warns when the increase in pressure drop over a filter
caused by gradual clogging becomes too high, by means of an electrical alarm
indication.
Attention: this only works at high inlet pressure (ideally atmospheric pressure
at the inlet)!
Switching ratings
DC 1A/60V Max
AC 0,5A/25V Max
See next page for threshold values.
Installation