10
4.6. Gas Type Dependent Operations
Where high level gas loads and rotation speeds are involved,
the resulting friction subjects the rotor to the effect of great
heat. To avoid over-heating, a power rotation speed charac-
teristic line is implemented in the TCM 1601; this ensures that
where maximum gas loads are involved, the pump will opera-
te at any rotation speed without the danger of damage
arising.
The maximum power is dependent on the type of gas. Two
characteristic lines are available for any type of gas in order
to fully exploit the power potential of the pump:
– "Gas-Mode 0" for gases with molecular mass
≥
40 as, for
example, Argon;
– "Gas-Mode 1" for all lighter gases.
➡
Set the applicable gas mode on the TCM 1601 (please refer
to Operating Instructions PM 800 478 BN for theTCM 1601).
Pumping gases with molecular mass
≥
40 with
the incorrect gas mode can cause damage to
the pump.
For the vertex of the power characteristic line please refer to
Section 8. Technical Data.
Maximum power is applied when the pump starts in order to
limit the time required. Once the set rotation speed is
attained, switching to the selected power characteristic line
is automatic.
If the gas dependent maximum power is exceeded, the rotati-
on speed is reduced until equilibrium between the
permissible power and gas friction is attained. The power
limitation serves to protect the pump against thermal over-
loading. In order to avoid rotation speed fluctuations it is
recommended to set, in rotation speed setting mode, the
equilibrium frequency or a somewhat lower frequency.
4.4. Operations With The TMS
If the pump is equipped with the temperature management
system (TMS) (TMH/TMU 1600M C T, see rating plate),
heating is possible in the area of the pressure stages with the
heaters integrated in the middle casing part and temperature
sensors up to a maximum of 90 °C.
➡
Connect the TMS to the magnetic bearing controller.
For connection diagram, function and circuit diagram
please refer to the operating instructions for the
TMS, PM 800 517 BN and for the TCM 1601 PM 800 478 BN.
– Condensable media may only be pumped once the
selected TMS temperature has been attained.
In order to optimize the performance of the pump in gas load
operations and to ensure temperature stability, the rotation
speed of the pump in the TMS mode is slightly reduced by
activating the TMS heating.
For specific rotation speeds in the TMS mode please refer to
Section 8, ”Technical Data”.
As a matter of principle, TMS heating is only activated on
attainment of the rotation speed switchpoint.
4.5. Intermittent Mode Operations Of The
Backing Pump
Where Pumping Station Control Unit TCS 180 is in operation
there is the option, under certain pre-conditions, to select
intermittent mode operations on the diaphragm pump (please
refer to the Section "Operations With Pumping Station Control
Unit TCS 180 in the TCM 1601 Operating Instructions
PM 800 478 BN).
If the setting procedure desribed there cannot be executed
the guide values
<710:
BkP Poff
> = 150 W und
<711:
BkP Pon
> = 280 W
can be used for the switch on and switch off threshholds.
The TMH 1600M P C H can not be operated in
connection with a diaphragm pump.
☞
PLEASE NOTE
Power
Frequency
D
B
C
A
D-C = Gas mode «0»
B-A = Gas mode «1»
Run up
fnom
Gas type characteristic line
