Elmo Rietschle L-BV5 Supplementary instructions - Manual (Page 5)

Concerning 3 Technical Data
© Gardner Denver Deutschland GmbH 5 / 12 610.44440.40.200
Concerning 3 Technical Data
Concerning 3.3 Operating conditions,
normal operation ...............
Temperatures
Temperature of the operating liquid
[°C] [°F]
max. +65 max. +149
min. +5 min. +41
Nominal value:
+15 +59
Pressures
Minimum suction pressure of the gas
If an explosive gas mixture should arise due to
ambient air entering the unit, the use of process
gas must be ensured for the cavitation protection.
If the unit suction pressure (p
1 min
) doesn’t stand
at a minimum of 50 mbar above the vapour
pressure (p
Vapour
) of the operating fluid
(=> p
1 min
≤ p
Vapour
+ 50 mbar) or when there are
changes in the operating conditions (media,
temperatures), consult the manufacturer.
Concerning 5 Installation
Concerning 5.1 Installing the unit
Conditions for setting up the system:
The type of protection on the drive motor must
correspond to the ambient atmosphere
requirements in accordance with guideline
94/9/EG.
The equipment and components added to the
unit must also correspond to the requirements for
device group II category in guideline 94/9/EG.
The equipment and components added to the
unit must also correspond to the requirements for
device group II category in guideline 94/9/EG,
unless they have their own ignition source. The
bleeder resistance for each installed accessory or
attached part as well as for the unit must have
< 10
6 Ohm to ground when assembled!
Concerning 5.2 Connecting the unit
mechanically
...............
Concerning 5.2.1 Connecting the suction and
discharge branches
In order to prevent overloading from throttle on
the discharge side, pressure monitoring (G2,
Fig. 1, page 6) must be installed on the other side
of the unit’s gas output flange. If the maximum
outlet pressure p
2 max
specified in the
610.44440.40.000 operating manual section 3.3,
“Operating conditions, normal operation” is
exceeded, the equipment must switch off.
If operating with cavitation protection, the line
must have sufficient electrical conductivity
(bleeder resistance < 10
6 Ω).
Foreign bodies must be prevented from getting
into the pump.
If there is danger of foreign bodies getting in
while the pump is operating or switched off,
suitable filters must be attached.
Concerning 5.2.3 Connecting up system
components ...............
The built-in monitoring systems must be fully
functional independently from one another. The
systems must also remain independent if
computer-programmed controls are used.
Monitoring of continual operating liquid feed
Monitoring of continual operating liquid feed is
compulsory. Monitoring can be ensured by the
following alternative systems:
a) Measuring the operating liquid volume flow
(F1, Fig. 1, page 6) with suitable sensor and
analysis device. Switching commands must
operate directly on the switches.
When using a volume flow device which can
block, an additional redundant monitoring
system must be provided.
Specifications regarding failure safety as well
as calibration and servicing intervals should
be taken from the monitoring device operating
manual.
Disconnection condition:
Volume flow ≤ 50 % of the design operating
fluid flow
(see 610.44440.40.000 operating manual
section 3.3, “Operating conditions, normal
operation”)