BeaconMedaes MAT-S Installation, Operation And Maintenance Instructions page 30

Medical Gas Supply System
Figure 25 Pressure Regulator Adjustment.
NOTE - A small flow is required for regulator adjustments,
see Figure 22 in Section 3 for reference.
The following procedure describes process of setting
1 stage pressure regulator's "base" pressure. This
st
procedure should only need to be performed if 1
pressure regulator pressures were not within acceptable
limits during performance verification procedure (Refer
to Section 3.4) or after servicing regulator.
Base pressure setting is a mechanical adjustment
controlled by regulator's internal adjusting spring and
is regulator's output pressure without any dome bias.
Recommended settings are listed in Table 6 (Intermediate
Pressure - Standby Bank). After base pressure has been
set, pressure will be increased by amount of dome bias
pressure. Refer to Table 6 (Intermediate Pressure -
Running Bank).
4.5.1.1 Remove the front cover of manifold system
(Item 22, Figure 1).
Cover
Latch
4.5.1.2 Close service valve for the control pressure line
(Item 10, Figure 1).
4.5.1.3 Press manual changeover icon
the screen. Cycle manifold from bank to bank to vent
residual dome bias pressure.
O2
1500
150 44.0
PSI
Change
Over Icon
4109992459.00
Rotate
anti-clockwise
to reduce set
point
2
1
Push
Button
and
1500
SCFH
40
1500
66.0 150
PSI PSI
110.0
4.5.1.4 Shut off all cylinders on the bank at the opposite
side of the regulator to be adjusted.
4.5.1.5 Slightly open vent valve (less than 1/4 turn) to
create a small flow of gas through manifold.
Vent
Valve
stage
st
4.5.1.6 Use 26 mm wrench, loosen 1
regulator locknut.
Adjustment
Nut
4.5.1.7 Use 19 mm wrench, set 1
1 regulator to the value specified in Table 6 (Intermediate
Pressure – Standby Bank). Turn anti-clockwise to reduce
the set point and turn clockwise to increase the set point.
4.5.1.8 Check the setting point of the intermediate
pressure by the intermediate pressure gauge (Item 16,
Figure 1).
2
Table 6: Regulator Pressure Setting.
Pull
Nominal System Design 55 psi
to Open
Intermediate Pressure
(Standby Bank)
Dome Bias Pressure
Intermediate Pressure
(Running Bank)
on
4.5.1.9 Tighten the 1
4.5.1.10 Close the vent valve (Item 6, Figure 1).
4.5.1.11 If the other 1
needs to be adjusted, repeat steps 4 through 9.
4.5.1.12 Slowly open all cylinders on both manifold
banks.
4.5.1.13 Open the service valve (Item 10, Figure 1) and
reset dome regulator (Item 19, Figure 1) to 40 psi (if
dome regulator included).
30
stage pressure
st
Lock
Nut
stage pressure
st
100 psi
70 psi 210 psi
55 psi 40 psi
125 psi 250 psi
stage pressure regulator locknut.
st
stage pressure regulator also
st
180 psi
210 psi
40 psi
250 psi