Maintenance; Operation - DeVilbiss HAF-503 Manual

Figure 1
Right
Figure 2
Air Gauge
1/4" NPT Pipe Plug
12. Install 1/4" NPT pipe plug into port on
bottom of manifold opposite the air
gauge using pipe sealant (See Fig. 2).
13. Install assembled elbow - ball valve
into end of manifold using pipe seal-
ant (See Fig. 2).
14. Attach the two regulator - gauge - ball
valve assemblies to the manifold (do
not use pipe sealant). Arrange ac-
cording to right or left hand opera-
tion. Tighten swivel fittings.
15. Install two "T" handles into regula-
tors.

OPERATION

After the unit is installed and ready to use;
1. Attach air hose(s) to outlet ball
valve(s), selecting regulated and/or
non-regulated according to the appli-
cation.
2. Open main shut-off valve upstream
of filter.
3. Main line air pressure is monitored
by the top air gauge.
4. Adjust regulator(s) to desired setting
by turning "T" handle in or out.
5. Open ball valve(s) to supply air to
spray gun or tool being used. With air
flowing, readjust air pressure at regu-
lator if necessary.
6. After use, shut off ball valve(s) and
bleed off residual air in hose(s).
Left
The filter change indicator (on
coalescer filter) only operates
when air is flowing. It is always
green with no air flow.

MAINTENANCE

Certain solvents, paints and
Elbow-Ball
chemicals may attack plastic bowl
Valve
and can cause bowl failure. Do
Assembly
not use near these materials.
When bowl becomes dirty, wipe
only with a clean, dry cloth. Im-
mediately replace any crazed,
cracked, damaged or deteriorated
plastic bowl with a new plastic
bowl. Reinstall metal bowl guard.
1. If bowl is equipped with manual
drain, drain bowl at least once per
shift. Units with automatic drain will
drain automatically.
2. Before performing maintenance on
unit, close main shut-off valve lo-
cated upstream of filter. Bleed off
residual air in unit.
3. To open filter, press button located
on clamp ring and rotate ring either
clockwise or counterclockwise. The
metal bowl guard and plastic bowl
can then be removed from the filter
head.
If you encounter difficulty sepa-
rating the plastic and metal
bowls, simply push the auto-
matic drain stem (by hand) to
either side as shown in Figure 3.
Do not strike the stem with any
tool. Damage may occur.
Figure 3
Plastic Bowl
Metal Bowl
4.
Note
5.
6.
7.
8.
Note
Automatic
Drain Stem
SB-6-148-F Page 3
Remove the filter element by
loosening the baffle counterclock-
wise. Clean or replace the filter ele-
ment. The element can be cleaned
by blowing off with a duster gun
(clean from inside out). Frequency of
element cleaning/replacement will
depend upon air quality, air usage,
and condition of the air piping. It is
recommended to check and clean/
replace the element every 3-6 months.
The coalescing filter element should
be replaced when the indicator
turns red.
Inspect o-ring (2) for damage. Re-
place if necessary.
Inspect plastic bowl for signs of dam-
age such as cracks, crazing or dete-
rioration. Replace if necessary. See
"Caution" under Maintenance sec-
tion.
Do not place unit in service with-
out metal bowl guard installed.
Before placing unit back into service,
make sure plastic bowl and metal
bowl guard are properly installed and
securely locked in place.
Confirm automatic drain operates
properly after unit is in operation.
Replace if necessary.