ABB Endura AZ40 Gebruiksaanwijzing - Pagina 8

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8 Replacing sensor assembly gaskets,

flow disk and replacing / cleaning the

aspirator

8.1 Removing the probe, exhaust filter, adaptor flange

(if fitted) from the sensor

Referring to Fig. 8.1:

1. If a flange adaptor A is fitted, use a 10 in. adjustable

spanner (wrench) to loosen and remove flange mounting

nuts and washers B and remove flange.

2. Unscrew probe / filter C and remove from manifold D.

3. Remove exhaust filter E from aspirator F using an

open-ended

in. spanner (wrench).

Fig. 8.1 Removing the probe, exhaust filter, adaptor flange from the sensor

4. Perform the required replacement / cleaning procedures by

referring to the following sections:

— Replacing sensor assembly gaskets: see section 8.2 to

remove covers, then section 8.3, page 9

— Replacing / cleaning sensor assembly aspirator: see

section 8.4, page 12

— Replacing sensor assembly flow disk: see section 8.2 to

remove covers, then section 8.5, page 14

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

8.2 Removing / Replacing sensor covers

8.2.1 Removing the sensor covers

Referring to Fig. 8.2:

1. Use a medium flat-bladed screwdriver to unscrew 4

(captive) cover retaining screws A and remove cover B.

Retain cover for re-use.

2. Use a medium flat-bladed screwdriver to unscrew 2

(captive) cover retaining screws C and remove cover

D.Retain cover for re-use.

IMPORTANT (NOTE)

Check the seals fitted to each cover. If they need

replacing or seals have bonded to the mating

surfaces of the sensor assembly, replace them.

Refer to Instruction

sensor cover seals replacement procedure.

Fig. 8.2 Removing the sensor covers

8.2.2 Refitting the sensor covers

Referring to Fig. 8.2:

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

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

sensor cover mounting screws A and C.

2. Refit covers in the reverse order of removal – refer to

Section 8.2.1 (above).

3. Refit the probe / filter assembly in the reverse order of

removal – refer to Section 8.1 (above).

4. Prepare the sensor assembly for operation by reversing the

sensor shutdown / removal procedure at the process –

refer to Section 4, page 4.

5. Refer to Operating instruction OI/AZ40-EN to restore the

analyzer to full operational condition.

INS/ANAINST/010-EN for the