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Air Supply
312775G 15
Air Connections
See the System Pneumatic Schematic on page 29.
1. Tighten all ProMix system air and fluid line connec-
tions as they may have loosened during shipment.
2. Install a bleed-type air shutoff valve into the control
air filter inlet on Wall Mount Fluid Station. F
IG. 4.
3. Connect a clean, dry, main air supply line to the
bleed-type air shutoff valve at the main air inlet. This
air line supplies air to operate the gun, solenoids,
and dispense valves.
NOTE: See Technical Data on page 41 for additional
air supply/consumption information.
4. lnstall a bleed-type shutoff valve into the air purge
valve line.
5. See F
IG. 5. Install the supplied elbow (E), check
valve (CV), and tube fitting (F) at the inlet of the air
purge valve (APV). Use the 25 ft (7.6 m), 1/4 in. (6
mm) OD purge air tubing (AT, supplied) to connect
a clean, dry air supply to the fitting (F) at the air
purge valve inlet. Install filters/dryers as needed.
F
IG. 4. Wall Mount Air Supply Inlet
NOTICE
Use a separate purge air supply line for the air purge
valve (APV). Do not connect the air purge valve to the
unit’s main air supply or to the air manifold (AM, F
IG.
4), to avoid contaminating the solenoids, air logic
lines, or unit’s main air supply with fluid if the air purge
valve (APV) and check valve (CV) fail.
Do not shorten the 25 ft (7.6 m), 1/4 in. (6 mm) OD
purge air tubing (AT). Check daily for any visible sol-
vent accumulation. Notify your supervisor if solvent is
present.
TI13069a
1
Install a bleed-type air shutoff valve here.
1
Main Air
Inlet
Air Filter
AM
F
IG. 5. Purge Air Supply Tube and Check Valve
NOTICE
The ProMix potlife timer will not function properly
when used with multiple guns operating simultane-
ously. To avoid having mixed material set in the
equipment, carefully monitor potlife by some other
means.
If using a Graco electrostatic PRO
™
Gun, a shutoff
valve must be installed in the gun air line to shutoff the
atomizing and turbine air to the gun. Contact your
Graco distributor for information on air shutoff valves
for electrostatic applications.
AT
TI16793a
CV
APV
F
E
Purge air line (AT) must be a separate air supply, connected
to the check valve (CV). Do not connect the purge air line to
the unit’s main air supply or to the air manifold.
2
2