DeVilbiss HAF-18 Service Information

Do not wash plastic bowl with automatic drain
installed. The automatic drain includes a float.
If water gets into the float, the automatic drain
may not function properly. Under normal
conditions, water will not enter the float.
However, water can get in the float if the filter
bowl is washed with the drain installed or if air
line contamination causes the drain mecha-
nism to stick.
You can confirm the automatic drain is not operating
if the water level in the plastic bowl is higher than
the top of the automatic drain.
To remove water from the float, follow these
instructions. Be careful not to lose or damage any
internal parts of the automatic drain (replacement
parts are not available - complete drain replacement
will be necessary).
Remove automatic drain from plastic bowl by
1.
loosening plastic retaining nut. Keep retaining
nut and O-ring for reassembly later.
Using a knife edge, carefully pry apart the float
2.
cover and bottom piece (See Figure 1).
Pry apart with knife edge.
Float
Cover
Figure 1
Slide float off float guide (See Figure 2).
3.
Float Guide
Float
Figure 2
HAF-18 AUTOMATIC DRAIN

SERVICE INFORMATION

Note
Bottom Piece
8
Using a knife edge, carefully pry off float cap
4.
(See Figure 3).
Pry apart with knife edge.
Cap
Clean inside of float. Remove all traces of water
5.
or dirt.
Insure rubber seal is in place in the center of the
6.
float stem (See Figure 4). If the seal comes out,
press it back in place in the recess of the stem.
Rubber
Seal
Replace the float cap (again, be certain the
7.
rubber seal, Figure 4, is in place).
Slide float over float guide.
8.
Snap float cover onto bottom piece.
9.
Install automatic drain into bowl. Be sure O-ring
10.
is in place (between the drain and bowl). Tighten
the plastic retaining nut firmly by hand.
Monitor the automatic drain for proper opera-
11.
tion. If it fails to operate properly, replace with
a new unit.
If the Float Guide inadvertently came apart,
refer to Figure 5 and instructions.
SERVICE BULLETIN
SB-6-149-B
Replaces SB-6-149-A
Figure 3
(Inside view of float)
Float Stem
Figure 4
Note