Pfeiffer Vacuum A 1204H, Operating Instructions Manual

Page: 38 / 92

38
Advanced settings
7.3 Water circuit
The water circuit dissipates heat from the functional block to protect the mechanical and
electrical components (motors and frequency converters).
It is also used for thermal regulation of the high pressure (HP) and low pressure (LP)
stages of the functional block (FB)
(see 7.4.1) .
Fig. 10: A 124H/A 204H/A 204X water circuit
Fig. 11: Water circuit for other models
7 LP water valve Temperature of the HP/LP stages regulation
8 HP water valve
9 Water Flowmeter Water flow measurement
10 Manual valve Roots cooling authorization
T
C
Temperature sensor Motor temperature measurement
T
R
Temperature sensor Roots motor temperature measurement (A 604/A 804)
T
HP
HP temperature sensor FB temperature measurement
T
BP
LP temperature sensor
BF Functional block
FC
BF
T
BP
T
HP
T
C
7 8
9
FC
FC
BF
Roots
V1
T
BP
T
HP
T
C
T
C
T
R
7 8
9