Endura AZ40 | Sensor assembly | Orifice and seals kit |
INS/ANAINST/007-EN Rev. B
7
7 Cleaning / Replacing CO and O
2
orifices
Referring to Fig. 7.1.
1.
Use a
1
/
4
in. allen key (wrench) to loosen and remove CO
orifice pipe plug
A
. Retain for re-use.
2.
Use a
5
/
32
in. allen key (wrench) to loosen and remove CO
orifice
B
. The CO orifice has 2 notches in the head.
3.
Use a
1
/
4
in. allen key (wrench) to loosen and remove O
2
orifice pipe plug
C
. Retain for re-use.
4.
Use a
5
/
32
in. allen key (wrench) to loosen and remove O
2
orifice
D
. The O
2
orifice has 1 notch in the head.
5.
Carefully clean any blockages or debris from both orifice
holes using a low pressure air hose.
If the blockage cannot be cleared, renew both orifices.
6.
Apply a small amount of anti-seize compound to the thread
of each orifice (
B
and
D
) and each pipe plug (
A
and
C
).
7.
Use a
5
/
32
in. allen key (wrench) to secure CO orifice
B
(2 notches in head) in place in the CO orifice chamber.
8.
Use a
1
/
4
in. allen key (wrench) to secure CO orifice pipe
plug
A
in place in the CO orifice chamber.
9.
Use a
5
/
32
in. allen key (wrench) to secure O
2
orifice
D
(1 notch in head) in place in the O
2
orifice chamber.
10. Use a
1
/
4
in. allen key (wrench) to secure O
2
orifice pipe
plug
C
in place in the CO orifice chamber.
11. Prepare the sensor assembly for operation by reversing
the shutdown / isolation procedure – refer to Section 4,
page 4.
12. Refer to Operating instruction OI/AZ40-EN to restore the
analyzer to full operational condition.
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.
CAUTION – Damage to equipment
Do not drill chamber out or scratch inner surfaces
as damage to any of the internal faces affects
aspirator performance.
CAUTION – Damage to equipment
Do not allow anti-seize compound to contaminate
the manifold surfaces or enter orifice holes.
Fig. 7.1 Cleaning / Replacing the orifices
