ABB Endura AZ20 series

Combustion Oxygen Monitor
Endura AZ20 Series Probe 5 Dismantling and Reassembly – Probe
IM/AZ20M–EN Rev. B 29
Referring to Fig. 5.14:
5. Fit and tighten the 3 internal structure mounting plate M4
screws A using the 3 mm A/F hexagon wrench
(supplied).
6. Refit the thermocouple / electrode assembly – refer to
Section 5.8.2, page 22.
7. Connect heater wires B to the terminal block (blue) and
terminal block (brown) connections.
8. If transmitter wires are present, fit terminal plug(s) C into
their sockets) and screw the terminal plug retaining screws
D into the terminal block(s) E.
9. Connect the Test Gas to Sensor tube F at the centre
connection.
10. AZ20 Probes only – disconnect the internal Reference Air
tube G from the connection on the probe body.
AZ20/ZFG2 Replacement Probes only – disconnect the
internal Reference Air tube H (connected to the internal
conduit) from the connection on the probe body.
11. If AutoCal is fitted, connect Test Gas 1 and 2 tubes I to
the AutoCal manifold by pressing blue release ring J and
connecting the tube.
12. Connect the internal earth connection
K.
13. Re-install the probe – refer to the probe User Guide
(IM/AZ20P–EN).
14. Make gas supplies to the probe (refer to the probe User
Guide [IM/AZ20E-EN] and electrical supplies to the
transmitter (refer to the transmitter User Guide
[IM/AZ20E-EN]).
15. If a new cell has been fitted, re-calibrate the probe – refer
to the transmitter User Guide (IM/AZ20E-EN).
Fig. 5.14 Securing the Heater Assembly and Making Connections
Test Gas Tube to Sensor Location
on Probes Fitted with AutoCal
Test Gas Tube to Sensor Location on
Non-AutoCal AZ20 and AZ20/ZFG2 Probes