ABB Endura AZ40 Instrukcja obsługi - Strona 14

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8.5 Replacing sensor assembly flow disk

WARNING – Bodily injury

– Probe assemblies (standard and high temperature

versions) contain fibrous material that can be a

health hazard if airborne.

– Appropriate PPE, including mask, goggles and

gloves must be worn when performing this

procedure.

Referring to Fig. 8.7:

1. Place the sensor assembly on a clean flat surface with the

flange studs pointing down.

2. Remove 2 long screws B using a small flat-headed

screwdriver.

3. Remove the flow disk assembly from flange manifold C.

4. Remove 2 (short) screws A using a small crosshead

screwdriver.

5. Separate flow disk cover plate D, flow disk top cover

gasket E, flow disk F, flow disk plate G and flow disk

lower cover gasket H. Discard gaskets E and H.

6. Fit a new flow disk into flow disk plate G, aligning the

center of the curved flow disk face I against the small

hole in the middle of the plate and in the orientation shown

(concave face uppermost).

CAUTION – Damage to equipment

Do not manually snap the flow disk.

This will cause it to malfunction.

7. Place a new flow disk top gasket over flow disk plate G.

8. Apply a light coating of anti-seize compound (suitable for

temperatures up to 200 °C [392 °F]) to the threads of 2

(short) screws A and secure items

using 2 (short) screws A. Tighten the screws firmly.

9. Place a new flow disk lower cover gasket in position on the

flange manifold C, ensuring screw holes are aligned

correctly.

10. Position the flow disk assembly over the new flow disk

lower gasket aligning the notched corner of the flow disk

assembly J with the upper right-hand corner. Ensure

screw holes are aligned correctly.

11. Apply a light coating of anti-seize compound (suitable for

temperatures up to 200 °C [392 °F]) to the threads of 2

(long) screws B and secure the flow disk assembly to

the flange manifold. Tighten the screw to a torque of

10 ±1 in.-lbs (1.1 Nm).

INS/ANAINST/007-EN Rev. B | Endura AZ40 | Sensor assembly | Orifice and seals kit

12. Apply 207 kPa (30 psig) air to air supply port K and check

13. Refer to Section 8.2.2, page 8 to refit the sensor cover.

14. Prepare the sensor for operation by reversing the

, F and G

for leaks around the gasket and for no flow through

aspirator L. If leaks are detected, tighten the screws until

all leaks are corrected. If flow is detected through the

aspirator at room temperature, rebuild the flow disk

assembly.

WARNING – Bodily injury

– Do not use compressed air for any other

purpose than that for which it is provided.

– Never direct a stream of compressed air

towards your body or the body of any other

person.

– When handling / connecting compressed air

lines the correct safety procedures must be

observed.

shutdown / removal / isolation procedures –

refer to Sections 5 and 4 (pages 4, 4).