Graco Husky 715, Instructions Manual

Page: 7 / 36

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Installation
Air Line
WARNING
A bleed-type master air valve (B) is required in your
system to relieve air trapped between this valve
and the pump. See Fig. 3. Trapped air can cause
the pump to cycle unexpectedly, which could result
in serious injury, including splashing in the eyes or
on the skin, injury from moving parts, or contamina-
tion from hazardous fluids.
CAUTION
The pump exhaust air may contain contaminants.
Ventilate to a remote area if the contaminants could
affect your fluid supply. See Air Exhaust Ventilation
on page 11.
1. Install the air line accessories as shown in Fig. 3.
Mount these accessories on the wall or on a
bracket. Be sure the air line supplying the acces-
sories is electrically conductive.
a. The fluid pressure can be controlled in either
of two ways. To control it on the air side, install
an air regulator (G). To control it on the fluid
side, install a fluid regulator (J) near the pump
fluid outlet (see Fig. 3).
b. Locate one bleed-type master air valve (B)
close to the pump and use it to relieve trapped
air. See the WARNING above. Locate the
other master air valve (E) upstream from all air
line accessories and use it to isolate them
during cleaning and repair.
c. The air line filter (F) removes harmful dirt and
moisture from the compressed air supply.
2. Install an electrically conductive, flexible air hose
(C) between the accessories and the 1/4 npt(f)
pump air inlet. Use a minimum 1/4” (6.3 mm) ID air
hose. Screw an air line quick disconnect coupler
(D) onto the end of the air hose (C), and screw the
mating fitting into the pump air inlet snugly. Do not
connect the coupler (D) to the fitting yet.
Fluid Suction Line
If using a conductive (acetal) pump, use conductive
hoses. If using a non-conductive (polypropylene)
pump, ground the fluid system. See Grounding on
page 5. The pump fluid inlet is 3/4 npt(f). See
Fig. 6. Screw the fluid fitting into the pump inlet
snugly.
If the inlet pressure to the pump is more than 25%
of the outlet working pressure, the ball check valves
will not close fast enough, resulting in inefficient
pump operation.
At inlet fluid pressures greater than 15 psi
(0.1 MPa, 1 bar), diaphragm life will be shortened.
See the Technical Data on page 34 for maximum
suction lift and flow rate loss at various lift dis-
tances.
Fluid Outlet Line
WARNING
A fluid drain valve (H) is required in your system to
relieve pressure in the hose if it is plugged. See
Figs. 3 to 5. The drain valve reduces the risk of
serious injury, including splashing in the eyes or on
the skin, or contamination from hazardous fluids
when relieving pressure. Install the valve close to
the pump fluid outlet.
1. Use electrically conductive fluid hoses (K). The
pump fluid outlet is 3/4 npt(f). See Fig. 6. Screw
the fluid fitting into the pump outlet snugly. Do not
overtighten.
2. Install a fluid regulator (J) at the pump fluid outlet
to control fluid pressure, if desired (see Fig. 3).
See Air Line, step 1a, for another method of
controlling pressure.
3. Install a fluid drain valve (H) near the fluid outlet.
See the WARNING above.