Pfeiffer TMH 065 - 4 Operations; Before Switching on; Switching on; Reset

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4. Operations
4.1. Before Switching ON
Turbopump rotors rotate at high speed. When
the high vacuum flange is open there is a dan-
ger of injury and of damage to the pump caused
by objects falling into the pump.
Therefore never operate the pump with open
high vacuum flange.
➡ With water cooling: Open cooling water supply and check
flow.
4.2. Switching ON
➡ Switch on the turbopump with switch S1 on the power
pack unit.
S2 S1
Electronic drive unit switches (schematically)
S1 Turbopump ON/OFF
S2 Heating ON/OFF
– With air cooling, the cooling fan is also switched on by the
electronic drive unit.
– If Pumping Station Control Unit TCS 303/304 is involved,
turbopump, backing pump and the water recycling unit (if
fitted) are started together with switch S1 on the
electronic drive unit.
Take care when pumping hazardous gases.
Comply with all the gas manufacturer's safety
instructions.
Reset
TMH/TMU 064/065 with TCP 015:
When the TCP 015 detects a fault, the motor power is
switched off. After the fault has been corrected, the pump
does not accelerate automatically. The ”reset” command
required for this may be executed by:
➡ Switching off via S1 for a time ≥ 5 seconds.
➡ Connecting the remote ”Fault reset” input, X5/b6 to X5/z2
(0 volt) for a time ≥ 5 seconds via an external switch.
➡ Transmitting a corrosponding command via the RS 232 C
interface.
TMH/TMU 065/064 with TCP 121 or TCP 380:
In the invent of malfunction, the voltage supply of the motor is
switched off via the contact K2. The reset function is activa-
ted by:
➡ Disconnecting the mains voltage for a time ≥ 2 seconds,
e.g. by pressing the mains switch S1.
➡ Operating an externally connected ”reset” pushbutton S3
for a time ≥ 2 seconds.
Please note:
In the ”reset” function is activated via an external reset push-
button, the TCP must be energized.
4.3. Heating (Only Pumps With Heating
Sleeves)
The heating period is dependent on the level of contamination
and the required final pressure. Heat for at least four hours.
➡ Switch on turbopump heating via switch S2 on the
electronic drive unit.
Please take account of the notes in Section 3.5.
4.4. Switching Off And Venting
To avoid contamination occurring when switching off, the
pump should be vented with dry venting gas before shut-
down.
➡ Close vacuum safety valve in the fore-vacuum line.
➡ Switch off both turbopump and backing pump at the same
time with switch S1 on the electronic drive unit.
➡ Open locking screw or venting valve in the venting
connection (with PFEIFFER venting valves and pertinent
control units the turbopump is vented automatically).
➡ With water cooling: Shut off water supply.
The minimum venting time to atmospheric
pressure is 30 seconds.