ABB Endura AZ20 series

Endura AZ20 series probe
Combustion oxygen monitor Appendix B – Endura AZ20/ZFG2 Replacement Probe
32 IM/AZ20P–EN Rev. G
B.1.2 Endura AZ20/ZFG2 Replacement Probe –
Conduit Reference Air Connections
Referring to Fig. B.3:
1. For probes using the conduit (internal) Reference Air line:
a. disconnect pipe
A at the hexagonal fitting B.
b. reconnect pipe
A to the internal Reference Air tube
C coming from the conduit – ensure flexible tubing
does not kink (especially after the probe end cap is
re-fitted)
c. fit a blanking plug to the external 'Ref. Air'
connection at B on the probe body to prevent
water ingress
d. proceed to step 3.
2. For probes using an external Reference Air line, connect
the existing reference air supply line to the probe’s external
'Ref. Air' connection – see section 4.4.6, page 24.
3. Refit probe end cap D and screw it hand-tight.
4. Refer to Appendix B.2, page 33 for connections to
ZDT-FG analyzers or Appendix B.3 page 34 for
connections to ZMT transmitters.
Fig. B.3 Endura AZ20/ZFG2 Replacement Probe –
Conduit Reference Air Connections
D
A
B
C