Nitrogen Membrane Separator; Figure 81. Carbon Dioxide Sensor - Carrier 69NT40-489-100 Series Operation And Service Manual

1. Carbon Dioxide Sensor

Figure 81. Carbon Dioxide Sensor

12.11 NITROGEN MEMBRANE SEPARATOR

WARNING
Make sure power to the unit is OFF and the
power plug is disconnected and tagged be-
fore servicing.
WARNING
Hazardous atmosphere inside. Ventilate
container before access.
a. Removing the Nitrogen Membrane Separator
1. Follow container venting procedures before perform-
ing any maintenance on the nitrogen membrane sep-
arator.
2. Remove bottom right-side panel (see Figure 82,
page 130). Using a 1/8 inch drill bit and drill, remove
the heads from the 12 rivets.
3. Remove the bottom fitting from the nitrogen mem-
brane separator.
1
4. Lower the upper panel and support the top grille with a
spacer for an easier removal process.
5. Remove insulation from permeate discharge line,
then remove drain line from permeate discharge el-
bow fitting.
6. Remove carbon dioxide bottle feed line (black hose).
7. Remove four bolts from the plate that is attached to
the top of the evaporator fan deck.
8. Remove the hose and the top fitting from the nitrogen
membrane separator.
9. Remove the four screws (#10-24 x 1/2 lg) from the
membrane mounting bracket assembly.
10.Remove top and bottom insulation caps from the ni-
trogen membrane separator.
11.Remove the nitrogen membrane separator through
the bottom panel area that was removed in step 2
above.
b. Replacing the Nitrogen Membrane Separator
1. Install the nitrogen membrane separator by reversing
the above steps.
129 T-305