Membrane Air Filter; Air Intake Filter; Figure 78. Membrane Air Filter Assembly; Figure 79. Air Intake Filter Assembly - Carrier 69NT40-489-100 Series Operation And Service Manual

12.6 MEMBRANE AIR FILTER

a. Removing the Membrane Air Filter Element
1. Swing open the controlled atmosphere control box
door.
2. Remove two bolts that attach the control box to the
unit frame. Remove two bolts that attach the control
box to the condenser coil cover. Swing the control box
out to access the air filter assembly.
3.Unplug the wire connectors from the solenoid valve on
bottom of both filter bowls. (See Figure 78)
4. Unscrew the filter bowl from the filter head assembly.
Inspect the filter bowl O-ring, reuse when reinstalling
the drain bowls.
5. Remove the filter elements (RB, item 9) and (C, item
5).
b. Replacing the Membrane Air Filter Element
1. Install the membrane air filter elements (RB) and (C)
by reversing the above steps.
2. When elements are replaced, function code Cd17
should be reset to "0". (See section 9.1.4, page 102.)
1
4
9
6
8
1. Bolt (1/4-20)
2. Filter Head O-Ring
3. Screw
4. Filter Bowl O-Ring
5. Filter Element (C) -- Blue
6. Filter Bowl
7. Solenoid Valve
8. Straight Fitting
9. Filter Element (RB) -- Red

Figure 78. Membrane Air Filter Assembly

2
3
4
5
6
7
c. Removing the Membrane Air Filter
1. Swing open the controlled atmosphere control box
door.
2. Remove two bolts that attach the control box to the
unit frame. Remove two bolts that attach the control
box to the condenser coil cover. Swing the control box
out to access the air filter assembly.
3. Disconnect tubing and remove the 90_ fitting and the
straight fitting from the bottom of both filter bowls.
(See Figure 78.)
4. Disconnect the copper lines feeding into and out of
the membrane air filter head.
5. Remove two bolts (1/4-20) from the filter head
bracket.
6. Remove the membrane air filter assembly.
d. Replacing the Membrane Air Filter
1. Install the membrane air filter by reversing the above
steps.

12.7 AIR INTAKE FILTER

a. Removing the Air Intake Filter
1. Remove the louver door from the right-hand side re-
frigeration evaporator access panel, see Figure 56,
page 89 by removing two bolts (#10-24 x 1/2 lg), two
flat washers (#10), and two Mylar washers.
2. Loosen four bolts (#10-24 x 1/2 lg) that secure the two
brackets holding the air intake filter in place.
3. Remove air intake filter (See Figure 79).
b. Replacing the Air Filter
1. Install the air intake filter by reversing the above
steps.
1
2
3
1. Bolt (#10-24)
2. Flat Washer
3. Mylar Washer
4. Louver Door
5. Hold Down Bracket
6. Air Intake Filter Element

Figure 79. Air Intake Filter Assembly

127
4
6
5
T-305