Pfeiffer Vacuum A 1204H, Operating Instructions Manual

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Advanced settings
7.6 Heating
The heating system eliminates any cold points in the pumping system to avoid gas con-
densation. The system can manage up to 3 different heating elements inside the pump.
Fig. 12: Heating
7.6.1 Management modes
The management mode is selected with the pump stopped :
– from HHR [SETTING] [TEMPERATURE] [HEATER 1 T°]/[HEATER 2 T°]/[HEATER
3 T°] (see 8.2) ,
– from serial link (see Serial link Operating instructions).
DISABLED No heating management.
CONTROL The heating element is thermally regulated. The heating is supplied independently of
pump start-up in accordance with temperature setpoints
[CONTROL] [THRESHOLD] . If
the temperature is lower than the setpoint, the heating is switched on. If the temperature
exceeds the setpoint, the heating is switched off.
7.6.2 Indicating a temperature defect
The setpoint temperature is set from HHR or by serial link. If the measured temperature
is higher than warning threshold value or lower by 10°C than the setpoint, a warning ap-
pears. A warning threshold and the associated delay can be set
[SETTING] [TEMPER-
ATURE] [HEATER 1 T°/HEATER 2 T°/HEATER 3 T°] [CONTROL] [DEFAULT HIGH/
LOW ] [WARNING] [ENABLED] [DELAY]
.
The heating system is equipped with a thermal safety which cause a fault in case of over-
load. A warning appears. A delay can be set for a pre-alarm:
[SETTING] [TEMPERA-
TURE] [HEATER ALARMS] [DEFAULTS] [PRE-ALARM] [ENABLED] [DELAY] .
BF
Roots
1
2
Temperature
Warning threshold
T°consigne - 10°C
Warning message ‘low temperature’
Warning message
alert
No message
T
Temps