ABB Endura AZ20 Manual page 4

Endura AZ20 Oxygen Systems
Endura AZ20 5µm/Oil Coalescing Filter Regulator
5 Pressurizing the System
Referring to Fig. 3.1:
1. Ensure isolating valve A is in the closed position.
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.
2. Lift the regulator cap B to unlock it.
3. Set the regulator (adjustment) C to its lowest pressure
setting by turning it fully anti-clockwise
4. Ensure both manual drain valves D and E are closed
by turning them fully clockwise
5. Make connections to the air inlet F and 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 H to pressurize the system.
8. Set outlet pressure to 1 bar (15 psi) as follows:
Caution. Never exceed a pressure of 2 bar (30 psi) to
the probe. Pressures above this limit can cause
serious damage to the probe.
a. partially open one of the manual drain valves D or
E to give a small, continuous flow of air
b. slowly adjust regulator C clockwise 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
J down to lock the regulator in position
d. close the open manual drain valve D or E
4
.
.
3-Way Ball Valve
Shut-off / Vent
Closed Position
A
Venting
3-Way Ball Valve
Shut-off / Vent
Open Position
H
F
I
Close Valve
Open Valve
Fig. 5.1 Pressurizing the System
5 Pressurizing the System
B J
Vented
C
G
D E
INF09/029 Rev. C