Vaisala K-PATENTS PR-23 Series, Instruction Manual, Page: 194 / 246

184 PR-23 instruction manual
5 1. Insert the safety pin.
2. Lock the safety pin with safety clip.
DO NOT PROCEED UNTIL YOU HAVE COMPLETED THIS
STEP!
6 1. Close the blow-out ball valve under Isolation valve.
2. Lift up the Isolation valve handle locking plate.
3. Open Isolation valve by turning the valve handle 90°.
The valve is open when the ball valve handle is parallel
to Retractor and sensor.
7 Now the sensor can be inserted into the process.
1. Turn the hand-wheel counterclockwise until it stops,
i.e. until the sensor flange connects with Isolation valve
and only the end of the screw thread is visible.
Warning! If you detect leaking, revert immediately to
the previous step. Do not continue the installation
until the reason for leakage has been cleared and
fixed.
8 Fit the four M12 nuts to the bolts holding the sensor to
Isolation valve and screw them on with a 19 mm or ¾”
wrench. Important: Do not overtighten the nuts, set
the torque at 50 Nm (37 ft/lbs).
DO NOT PROCEED UNTIL YOU HAVE COMPLETED THIS
STEP!
9 1. Remove the safety clip.
2. Remove the safety pin.