BUSCH COBRA BC 0101 G, Instruction Manual

Page: 6 / 24

Maintenance clearance
Before any maintenance action, ensure a maintenance clearance
around the pump of min. 610 [mm].
Electrical safety
Types of Electrical Work
The following are the four types of electrical work defined by the SEMI
S2, latest version, guideline:
Type 1
Equipment is fully deenergized.
Type 2
Equipment is energized. Energized circuits are covered or insulated.
NOTE : Type 2 work includes tasks where the energized circuits are or
can be measured by placing probes through suitable openings in the
covers or insulators.
Type 3
Equipment is energized. Energized circuits are exposed and inadvertent
contact with uninsulated energized parts is possible. Potential
exposures are no greater than 30 volts rms, 42.4 volts peak, 60 volts dc
or 240 volt-amp in dry locations.
Type 4
Equipment is energized. Energized circuits are exposed and inadvertent
contact with uninsulated energized parts is possible. Potential
exposures are greater than 30 volts rms, 42.4 volts peak, 60 volts dc,
or 240 volt-amp in dry locations. Potential exposures to
radio-frequency currents, whether induced or via contact, exceed the
limits in Table A5-1 of Appendix 5 (SEMI S2 guideline).
Lock Out/ Tag Out procedure (Type 1 of
electrical work)
l Stop the pump with the remote control or with the Start/ Stop
button
l Switch off the customer’s power supply
l Switch off the water quick connections (inlet first, then outlet)
l Put the label or warning board “Maintenance processing” on or
next to the pump
Safety Lockout procedure
l
Take off the label or warning board “Maintenance processing”
l Check the cooling liquid and oil levels according to the chapters
“Checking the oil level” and “Checking the cooling liquid level”
l Switch on the customer’s power supply
l Switch on the water quick connections (outlet first, then inlet)
l Start the pump with the remote control (turn run switch (Remote /
Local)) or with he Start/ Stop button
Safety interlock description
Interlock event Sensor Response
Motor
overcurrent
Frequency in-
verter
Inverter default and remove
power to motor
S
Motor
overtemperature
(t° > 150°C)
Thermo
switch B1
(klixon)
Contactors open and remove
power to motor
S
Discharge
overpressure
(option)
Pressure
sensor B4
Depends on alarm function set in
the PLC for overpressure
Set at factory: None ie. the pump
continues running with alarm
S
Cylinder
overtemperature
(option)
Temperature
sensor B6
Depends on alarm function set in
the PLC for cylinder temperature
Set at factory: General Stop ie. the
contactors open and remove
power to motor
S
Cooling water
flow low
Water
flowmeter B2
Depends on alarm function set in
the PLC for water flow
Set at factory: General Stop ie. the
contactors open and remove
power to motor
S
H= Hardware, S= Software
Safety
BC 0100 F
Page 6
0870704904 (En)
Safety advice on vacuum pump BC 0101 G
CAUTION
Hot surface! Do not touch!
Oil filling