Replace O2 Supply Switch; Checkout Procedure For O2 Supply Switch - GE 9100c Technical Reference Manual

9.8 Replace O supply switch
2
9.8.1 Checkout
procedure for O
supply switch
Adjustment
screw
4-mm hex
M1207026
M1207027
Reproduced from the electronic master in MATRIX
The O supply switch is located under the tabletop.
2
1. Remove the tabletop (Section 9.3).
2. Remove the two mounting screws from the O
3. Pull the O supply switch out of the manifold.
2
4. Install the replacement O
5. Tighten the screws.
6. Disconnect the leads from the old switch and reconnect them to
the new switch.
7. Adjust the alarm threshold for the new O
explained in the checkout procedure below (Section 9.8.1).
8. Replace the tabletop.
9. Perform the checkout procedure (Section 3).
1. Remove the tabletop (Section 9.3).
2. Remove the remove the large upper rear panel (Section 9.2).
2
3. Disconnect all pipeline hoses from the wall and the machine,
close all gas cylinders.
4. Attach a gauge to the O
only machines, attach the gauge to a 6-mm O
5. Zero the O flow.
2
6. Install an O cylinder and open the cylinder valve (for pipeline
2
only, connect O
2
7. Set the system switch to On.
8. Close the cylinder valve (disconnect pipeline from source) and
watch the test gauge as the O
Note: The "No O
descending pressure of 221–193 kPa (32–28 psi).
9. If adjustment is required, set the adjustment screw so that the
"No O pressure" alarm occurs at 207 ±7 kPa (30 ±1 psi).
2
10. Disconnect the gauge and plug the test port.
11. To reassemble, perform the previous steps in reverse order.
12. Perform the checkout procedure (Section 3).
004 MANUAL−DOC, Technical Reference Manual, Technical Reference Manual for 9100c, English
9 Repair Procedure
supply switch.
2
supply switch, as
2
primary regulator test port. (On pipeline
2
pipeline source).
pressure bleeds down slowly.
2
pressure" alarm should occur between
2
supply switch.
2
port).
2
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