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NM3
4.10.24.8
4.10.24.9
4.10.24.10 If the nitrous oxide does not start to flow when the
4.10.24.11 Repeat steps 4.10.24.4 through 4.10.24.10 until no
4.10.24.12 Adjust the oxygen flow to a point where the nitrous oxide
4.10.24.13 The oxygen concentration should be between 21% and
*
4.10.24.14 If the yellow O
*
4.10.24.15 If the yellow O
*
4.10.24.16 Loosen set screw A and move the switch mount until it
*
4.10.24.17 Turn the cam clockwise until the switch contacts close
*
4.10.24.18 Close the N
*
4.10.24.19 Adjust the oxygen flow to 1 liter per minute.
*
4.10.24.20 Slowly open the N
*
4.10.24.21 The yellow O
*
4.10.24.22 Adjust the oxygen flow to 1.5 liters per minute.
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REPLACEMENT PROCEDURES (continued)
Slowly open the O
flow control valve.
2
If the nitrous oxide starts to flow when the oxygen flow
is between 200 and 300 ml per minute, proceed to step
4.10.24.12.
oxygen flow is between 200 and 300 ml per minute,
loosen set screw E and move the cam mounting bracket
to the left until nitrous oxide flow starts. Tighten set
screw E.
further adjustment of the cam mounting bracket is
needed.
flowmeter indicates 10 liters per minute.
29% oxygen.
/N
O FLOW RATIO lamp on the alarm
2
2
panel is lighted, proceed to step 18.
/N
O FLOW RATIO lamp on the alarm
2
2
panel is not lighted, loosen set screw H and turn the
switch adjustment cam until it is pointing downward.
is nearly touching the switch adjustment cam. Tighten
setscrew A.
and the O
/N
O FLOW RATIO lamp is lighted. Tighten
2
2
set screw H.
O flow control valve.
2
O flow control valve.
2
/N
O FLOW RATIO lamp on the alarm
2
2
panel should light as soon as the ORMC limits the flow
of nitrous oxide.
4-35
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Troubleshooting
