22
Installing the Drive Unit
Step-by-Step Instructions
CAUTION:
Be sure to follow the steps below in the correct order.
1) Insert the drive unit (in
SERVICE position
) into the process unit
(P)
.
The radial position of the drive unit is determined by a coding pin
(O)
in the calibration
chamber and an opening
(C)
in the drive unit. The coupling nut can only be tightened when
the drive unit is in the correct position.
2) Now tighten the coupling nut
(B)
(turn clockwise – hand-tight or 10 Nm – using wrench no. 1
included in the ZU 0680, ZU 0740 accessory if required).
3) Install inlet and outlet
(I)
if provided.
4) Install sensor as described in section “Installing and Removing a Sensor” on page 16.
P
B
O
C
Wrench no. 1
included in accessory:
ZU 0680
ZU 0740
I
