Combustion Oxygen Monitor
Endura AZ20 Series Probe 5 Dismantling and Reassembly – Probe
14 IM/AZ20M–EN Rev. B
5.4 Removing / Refitting an Integral Probe
Referring to Fig. 5.1:
1. Isolate the transmitter from mains power supplies and
label the isolator to prevent power being reconnected
accidently.
2. Isolate, identify and disconnect gas supplies.
3. Remove the transmitter terminal chamber cap A.
4. Before disconnecting any of the field terminations, use the
blank terminal block B in Fig. 5.1 to note the existing
transmitter connections.
5. Disconnect the field terminations.
6. Loosen cable glands
C (as required) and separate and
insulate individual mains and signal cable terminations as
a safety precaution.
7. Remove the probe from its mounting by reversing the
installation procedure (refer to the probe User Guide
[IM/AZ20P–EN] for original installation instructions),
ensuring the probe is supported along the length of the
body.
8. Move the probe to the maintenance area.
9. Proceed with the required maintenance procedure(s).
10. To refit the probe refer to the probe User Guide
(IM/AZ20P–EN).
5.5 Removing / Refitting a Remote Probe
1. Isolate the remote transmitter from mains power supplies
and label the isolator to prevent power being reconnected
accidently.
2. Isolate, identify and disconnect gas supplies.
Referring to Fig. 5.2:
3. Unscrew and remove probe cover A.
4. Disconnect all wires to terminal block
B.
5. If AutoCal is fitted, disconnect all wires to terminal block
C.
6. Loosen cable gland D and carefully withdraw the cable
from the probe.
7. Separate and insulate the individual heater and signal
cable terminations as a safety precaution.
8. Remove the probe from its mounting by reversing the
installation procedure (refer to the probe User Guide
(IM/AZ20P–EN) for original installation instructions), ensure
the probe is supported along the length of the body as it is
withdrawn from the flue.
9. Move the probe to the maintenance area.
10. Proceed with the required maintenance procedure(s).
11. To refit the probe refer to the probe User Guide
(IM/AZ20P–EN)..
Fig. 5.1 Disconnecting an Integral Probe
L
N
10
9
8
7
6
5
4
3
2
NC
C
NC
C
+
A
B
C
1
A
B
C
Fig. 5.2 Disconnecting a Remote Probe
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