Safety Information
10 300314330_002_A7 - 06/2013 - © Oerlikon Leybold Vacuum
16 For models with external frequency converter only:
Consider the following precautions for the output circuit wiring.
Do not connect any other load than a 3 phase motor to the frequency
converters output.
Never connect a power source to the frequency converters output.
Never short or ground the output terminals.
Do not use phase correction capacitors.
17 The pump must be integrated in the system control arrangement so
that it can not run-up automatically after it has been shut down due to
overtemperature. This applies equally to emergency shut-down
arrangements. After having determined the fault cause, the pump
should be switched on manually again.
18 We recommend the use of the external display (accessory) to operat-
ing the frequency converter. Attach the external display appropriately if
it used permanently.
19 Work on the frequency converter within the motor casing must always
be left to suitably instructed personnel only.
0.3 Thermal Hazards
1 Under certain ambient conditions parts of the pump may attain tem-
peratures over 80° C. There then exists the risk of suffering burns.
Note the danger symbols on the pump and in the case of a hot pump
wear the required protection equipment. All work on a pump which is
“still warm from operation” should be done only whilst wearing protec-
tive gloves.
2 Handle the pump only while vented and after having let it cool down.
3 Before disassembling any cooling water lines, leave the pump to cool
down, shut off the feed line.
4 When uninstalling the cooling water lines, take note of splashing water.
Heated water can cause burns.
5 Never remove the oil-fill or oil-drain plugs while the pump is running.
There exists the risk of suffering burns. Always wear protective gloves
and protective goggles also for protection against the oil.
6 Operating the pump with less than the specified amount of cooling
water will result in excessively high surface temperatures. Moreover,
there exists the risk of suffering burns.
7 DRYVACs without cooling water unit:
(Basic versions) For these DRYVAC pumps do not connect the cooling
water using self-sealing quick locks or shut off the feed and discharge
lines with valves.
After switching off, the pump will continue to produce heat. If upon
switching off the pump someone would then interrupt the cooling
water flow (through quick locks or valves on both sides (feed and dis-
charge)) then the water will continue to heat up further but will not be
able to expand. The high pressure thus produced may cause damage
to the cooling water channels and seals. Moreover, hot water or steam
may escape.
CAUTION
