Endura AZ20 series probe
Combustion oxygen monitor
3 Mechanical Installation
IM/AZ20P–EN Rev. G
7
3.4 Siting
Avoid locations where:
obstructions or bends create turbulence in the gas flow
and / or hinder probe insertion and removal
vibration induced by other plant or vortex shedding is
present
the probe may be subject to shock loading, for example,
close to ash hammers
If excessive abrasive dust is present, fit a protective shield along
the whole length of the inserted probe section.
If liquid condensation is present or could be created (for
example a cold start on a gas boiler), mount the probe at a
downward angle to prevent water entering the cell.
If necessary, thermally lag the probe mounting flange and body
to prevent acid dew-point corrosion and to maintain the probe
head temperature within the range of –20 to 70 °C (4 to 176 °F).
3.4.1 System Overview
Fig. 3.2 Probe and Transmitter Temperature / Environmental Limits and Power Input / Output Supplies
55 °C
(131 °F)
IP66 (NEMA 4X)
–20 °C
(–4 °F)
–20 °C
(–4 °F)
*Flue
0.5 to 4 m
(1.7 to 13.1 ft.)
800 °C (1472 °F)
IP66 (NEMA 4)
IP66 (NEMA 4)
70 °C
(158 °F)
–20 °C
(–4 °F)
Mains Supply
Relays
Output Signals
Probe with Integral Transmitter**
Probe with Remote Transmitter**
20 mm or
1
/
2
in. NPT
Gland
Endura AZ20 Probe Cable (ABB Supplied) – Max. 100 m (300 ft.)
Mains Supply
Relays
Output Signals
*Can withstand 35 kPa (5.1 psi) – positive or negative (pressure compensation required above 5 kPa [0.7 psi] – transmitter can supply fixed
pressure compensation)
**Transmitter does not contain a reference air supply for the probe.
55 °C
(131 °F)
–20 °C
(–4 °F)
Summary of Contents for Endura AZ20 series
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