–
Required pressure differential across supply and return:
³
3 bar
l
To reduce the maintenance effort and to achieve a long product
lifetime we recommend the following cooling water quality:
–
Hardness:
< 5° dH (degrees German hardness)
< 9° fH (degrees French hardness )
< 1.25° e (degrees English hardness)
< 90 mg/kg CaCO3 (American hardness)
–
Properties: Clean & clear
–
pH value: 7 - 9
–
Particle size:
<
200
m
m
–
Chloride:
<
100 mg/l
–
Free chlorine:
<
0.3 mg/l
–
Materials in contact with the cooling water: Stainless steel, copper
l
Make sure that the vacuum pump is fastened to prevent
inadvertent movement
l
Make sure that the vacuum pump is level to a maximum of 1° in
any direction
l
Make sure that the environment conditions correspond to the
protection class of the motor (according to motor nameplate)
l
Make sure that the vacuum pump is fastened to prevent
inadvertent movement
l
Make sure that the cooling water is neutral and clean.
l
Make sure that the nitrogen fulfills the following requirements
(option):
–
pressure: 1.5 bar
–
approximate flow rate: 0 - 18 SLM
l
Make sure that the ambient conditions correspond to the
protection class of the motor(s) (according to nameplate).
l
Make sure that the vacuum pump is level.
l
Make sure that the vacuum pump is easily accessible and that the
selected installation site fulfills the requirements for assembly/
dismantling.
l
Make sure that no temperature-sensitive parts (for example, of
plastic, wood, cardboard, paper, electronic parts) come into
contact with the hot surfaces of the vacuum pump.
l
Make sure that the installation site or assembly area is ventilated in
such a way that adequate cooling of the vacuum pump is ensured.
CAUTION
The surface temperature of the vacuum pump can exceed 70°C
when the vacuum pump is in operation.
Risk of burns!
l
Make sure that no-one can touch the vacuum pump accidentally.
If necessary, attach safeguard.
l
Make sure that the oil sight glasses (OSG) are easily accessible.
If oil changes are to be made on site:
u
Make sure that the oil drain and oil filler are easily accessible.
Inlet connection
l
Make sure that the protection that was attached to prevent
penetration of particles during transport has been removed before
the vacuum pump is connected to the vacuum line.
CAUTION
Do not put hands into the inlet aperture.
Risk of body damage!
CAUTION
The intake of liquids or solid particles can lead to the destruction of
the vacuum pump.
If the sucked gas contains dusts or solid foreign bodies:
u
Make sure that a suitable filter or protective screen is installed
at the inlet of the vacuum pump.
l
Make sure that the nominal diameter of the intake line is at least
equal to the diameter of the intake flange of the vacuum pump to
prevent a drop in the performance of the vacuum pump in the case
of a smaller cross-section.
l
Make sure that the vacuum pump is connected with leakproof
lines.
CAUTION
When the intake lines have been connected, make sure that the
system does not leak. Leakages of dangerous substances must be
prevented!
l
Make sure that the intake lines are equipped with a shut-off device
upstream of the intake flange so that the flow of drawn gas can be
stopped.
l
Make sure that the intake lines do not exercise any load on the
intake flange. Mount bellows if necessary.
l
The intake flanges have the following dimensions:
–
DN 40 ISO KF for NS 0070 C
–
DN 50 ISO KF for NS 0160 C
In the case of long intake lines the line cross-section should be larger
than the intake flange to prevent a drop in the performance of the
vacuum pump. If you have any doubts, contact your Busch
representative.
Discharge connection
CAUTION
Do not put hands into the outlet aperture.
Risk of body damage!
The following instructions for connection to the exhaust only apply if
the drawn gas is discharged by the vacuum pump into a suitable
environment.
l
Make sure that the protection that was attached to prevent ingress
of particles during transport has been removed before the vacuum
pump is connected to the exhaust line.
l
Make sure that the nominal diameter of the exhaust line is at least
equal to the diameter of the exhaust flange of the vacuum pump
to prevent a drop in the performance of the vacuum pump in the
case of a smaller cross-section.
l
Make sure that the vacuum pump is connected with leakproof
lines.
CAUTION
When the exhaust lines have been connected, make sure that the
system does not leak. Leakages of dangerous substances must be
prevented!
l
Make sure that the exhaust line is mounted in such a way that
condensate cannot penetrate into the pump (siphon trap, slope).
l
Make sure that no shut-off devices are mounted in the exhaust
line.
l
Make sure that the exhaust lines do not exercise any load on the
exhaust flange. Mount bellows if necessary.
l
The exhaust flange has the following dimension:
NS 0070-0160 C
Installation and Commissioning
0870570353 (En)
Page 7
Summary of Contents for COBRA NS 0070-0160 C
Page 23: ...Note...
