ABB Endura AZ40 Operating Instruction page 12

8.4 Cleaning / Replacing sensor assembly aspirator
Referring to Fig. 8.5:
1. Place the sensor assembly on a clean flat surface with the
flange studs pointing up.
7
2. Use an open-ended /
and remove aspirator A. Withdraw the aspirator, nozzle
B and gasket C from flange block D.
3. Examine the aspirator and nozzle for blockages. Remove
any gasket material from the aspirator assembly. Remove
any contamination with an air hose.
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
– Suitable PPE (goggles / gloves / overalls) must
be worn
CAUTION – Damage to equipment
Do not drill chamber out or scratch inner surfaces
as damage to any of the internal faces will affect
aspirator performance.
4. If aspirator A and nozzle B cannot be cleaned discard
them and fit a new aspirator and nozzle at step 7 onwards.
IMPORTANT (NOTE)
Dispose of the old aspirator / nozzle / gasket in
accordance with the guidelines contained in
Operating instruction OI/AZ40-EN.
5. Clean the aspirator flange counter-bore and flange local
surfaces thoroughly. Ensure no gasket particles fall into the
passage ways.
6. Fit a new gasket C in the aspirator flange counter-bore,
centre it and ensure it is seated correctly.
12 INS/ANAINST/007-EN Rev. B | Endura AZ40 | Sensor assembly | Orifice and seals kit
in. spanner (wrench) to unscrew
8
7. Fit the nozzle B into the aspirator A, ensuring it is
seated correctly.
8. Apply a light coating of an anti-seize compound (suitable
for temperatures up to 200 °C [392 °F]) to the threaded
portion E of the aspirator.
9. insert the new or cleaned aspirator /nozzle assembly
into the aspirator chamber and tighten to a torque of
28 ±2 in.-lbs (3.16 Nm) using a
CAUTION – Damage to equipment
Do not overtighten.
7
/ in.spanner (wrench).
8