ABB Endura AZ20 series User manual

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ABB MEASUREMENT & ANALYTICS | INFORMATION | INF09/029 REV. C
Endura AZ20
Oxygen monitor
5μm/Oil coalescing filter regulator
Measurement made easy
1 Introduction
This publication details the installation and
maintenance of an Endura AZ20 5μm/oil coalescing
filter regulator.
2 For more information
Further information is available from:
www.abb.com/analytical
or by scanning these codes:
Sales Service
Endura AZ20
oxygen monitor

Endura AZ20 Oxygen Systems
Endura AZ20 5µm/Oil Coalescing Filter Regulator 3 Identification
2 INF09/029 Rev. C
3 Identification
The filter regulator can simultaneously supply up to 6 ABB
zirconia-based in situ oxygen sensors with reference air at 0.3 to
0.5 l/min (0.64 to 1.06 scfh) and test gas air at 2.2 l/min (4.662
scfh).
Two models are available – see Table 3.1:
Each unit contains 2 replaceable filter cartridges – see Table 3.2:
Description ABB Part Number
5µm/oil coalescing filter regulator –
1/4NPT (1/4in. OD compression
fitting, female thread)
AZ200 731
5µm/oil coalescing filter regulator –
1/4BSP (6 mm OD compression
fitting, female thread)
AZ200 732
Table. 3.1 5µm/Oil Coalescing Filter Regulator Models
Description ABB Part Number
5µm Filter cartridge AZ200 740
Oil coalescing filter cartridge AZ200 741
Table. 3.2 Replacement Filters
Notes.
The filters on the regulator unit provide a safeguard
against water and oil passing through to the oxygen
sensor under fault conditions of the customer air
supply only.
Under normal operating conditions, it is important that
the customer’s inlet air supply is free from oil, water
and oil vapor.

Endura AZ20 Oxygen Systems
Endura AZ20 5µm/Oil Coalescing Filter Regulator 4 Installation and Routine Checks
INF09/029 Rev. C 3
4 Installation and Routine Checks
4.1 Preparation
To prepare the filter regulator for use:
1. Fit the air connectors to the filter regulator, using sealing
tape on the threads to ensure an air-tight seal.
2. Mount the filter regulator vertically on a firm, clean, dry
surface using the cradle and brackets supplied.
4.2 Routine Checks
4.2.1 Filters
Inspect the 2 filters regularly and renew at 12-monthly periods
(or sooner) depending on operating conditions.
4.2.2 3-Way Ball Valve Shut-off / Vent Operation
Before using the filter regulator, familiarize yourself with
operation of the 3-way ball valve shut-off / vent by referring to
Fig. 4.1.
4.2.3 Manual Drain Valves
Open the manual drain valves on the bottom of the filter
cartridges regularly to drain any contaminants and check air
quality. The frequency of this routine depends on conditions of
operation.
4.3 Filter Components
Warning. Refer to Section 3 before pressurizing the
system.
Caution. Before making connections to the probe:
Refer to the relevant probe manual for flow
requirements.
Flowmeters must be used on probes that do not have
restrictors fitted to regulate both reference air and test
gas flow to the probe – failure to set the correct flows
will result in read errors and possible damage to the
sensor.
Warning.
The supply line pressure to the probe is vented via the
3-way ball valve shut-off / vent.
Keep clear of the vent when the valve is closed and if
necessary, connect a pipe to the vent and route to a
safe area.
Fig. 4.1 3-Way Ball Valve Shut-off / Vent Operation
Valve Closed
Venting
Vented
Valve Open
Item Description
1Air in connector
(NPT or BSP specified when ordering)
23-Way ball valve shut-off / vent
3Regulator (adjustment)
4Air out connector
(NPT or BSP specified when ordering)
5Oil coalescing filter cartridge
6Manual drain valve
7Manual drain valve
85µm filter cartridge
9Pressure gauge (outlet)
Table. 4.1 Filter Regulator Main Components
23
9
14
8 57 6
Air In*
Air Out
(to Probe)
See
Warning in
Section 2.1
*3.5 bar (50 psi) min.
10 bar (145 psi) max.
Vent Outlet

Endura AZ20 Oxygen Systems
Endura AZ20 5µm/Oil Coalescing Filter Regulator 5 Pressurizing the System
4 INF09/029 Rev. C
5 Pressurizing the System
Referring to Fig. 3.1:
1. Ensure isolating valve Ais in the closed position.
2. Lift the regulator cap Bto unlock it.
3. Set the regulator (adjustment) Cto its lowest pressure
setting by turning it fully anti-clockwise .
4. Ensure both manual drain valves Dand Eare closed
by turning them fully clockwise .
5. Make connections to the air inlet Fand air outlet G.
6. Apply oil- and water-free instrument air at a pressure of
3.5 to 10 bar (50 to 145 psi) to air inlet connection F.
7. Open isolating valve Hto pressurize the system.
8. Set outlet pressure to 1 bar (15 psi) as follows:
a. partially open one of the manual drain valves Dor
Eto give a small, continuous flow of air
b. slowly adjust regulator Cclockwise until a
constant pressure of 1 bar (15 psi) is achieved on
the output pressure gauge I
c. when reading of 1 bar (15 psi) is displayed on the
output pressure gauge I, press the regulator cap
Jdown to lock the regulator in position
d. close the open manual drain valve Dor E
Warning. The supply line pressure to the probe is
vented via the 3-way ball valve shut-off / vent. Keep
clear of the vent when the valve is closed and if
necessary, connect a pipe to the vent and route to a
safe area.
Caution. Never exceed a pressure of 2 bar (30 psi) to
the probe. Pressures above this limit can cause
serious damage to the probe.
Fig. 5.1 Pressurizing the System
D
I
FG
A
H
E
J
B
C
3-Way Ball Valve
Shut-off / Vent
Closed Position
Close Valve
Open Valve
3-Way Ball Valve
Shut-off / Vent
Open Position
Venting
Vented

Endura AZ20 Oxygen Systems
Endura AZ20 5µm/Oil Coalescing Filter Regulator 6 Replacing the Filter Cartridges
INF09/029 Rev. C 5
6 Replacing the Filter Cartridges
6.1 Removing the Existing Filters
Referring to Fig. 6.1:
1. Close isolating valve A.
2. Release air from the 1 bar (15 psi) low pressure delivery
side Bby opening the manual drain valves Cand
D
3. Remove the oil coalescing filter cartridge Eby rotating
the base 1/4turn anti-clockwise and withdrawing the
complete cartridge.
4. Repeat step 3 to remove the 5µm filter cartridge F.
5. Fit new filters as detailed in Section 6.2, page 6.
Warning. The supply line pressure to the probe is
vented via the 3-way ball valve shut-off / vent. Keep
clear of the vent when the valve is closed and if
necessary, connect a pipe to the vent and route to a
safe area.
Fig. 6.1 Removing the Existing Filters
A
CD
B
E
F
5µm
Filter Cartridge
Oil Coalescing
Filter Cartridge
Venting
Vented

Endura AZ20 Oxygen Systems
Endura AZ20 5µm/Oil Coalescing Filter Regulator 6 Replacing the Filter Cartridges
6 INF09/029 Rev. C
6.2 Fitting New Filters
Referring to Fig. 6.2:
1. Free the oil coalescing filter Afrom the filter cartridge
Bby pressing the retaining tab Cin and tilting the filter
Ato free it from one tab.
2. Lift the oil coalescing filter Aaway from the cartridge
body.
3. Check that the O-ring Dis seated correctly in the recess
on the cartridge.
4. Fit a new oil coalescing filter Eto the exiting cartridge
body by sliding it over the 2 retaining tabs F.
5. Repeat steps 1 to 4 to fit a new 5µm filter to the cartridge
5µm filter cartridge.
6. Position the oil coalescing filter cartridge Gin the filter
cartridge container Hand secure it by rotating the base
1/4turn clockwise .
7. Position the 5µm filter cartridge Iin the filter cartridge
container Jand secure it by rotating the base 1/4turn
clockwise .
Important. To re-pressurize the system, follow the
procedure detailed in Section 5, page 4.
Fig. 6.2 Fitting New Filters
B
E
C
A
A
F
D
G
H
I
J
5µm Filter
Cartridge
Oil Coalescing
Filter Cartridge

INF09/029 Rev. C 08.2018
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without prior notice. With regard to purchase orders, the agreed particulars shall prevail.
ABB does not accept any responsibility whatsoever for potential errors or possible lack of
information in this document.
We reserve all rights in this document and in the subject matter and illustrations contained
therein. Any reproduction, disclosure to third parties or utilization of its contents – in
whole or in parts – is forbidden without prior written consent of ABB.
© ABB 2018
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