Installation
For the recommended air supply system installation,
see Instruction Manual 307–375.
The following are additional recommendation for
Maximum Noise Reduction.
See Fig. 2. The air line should be connected to the
air motor inlet (S) with a grounded flexible hose.
Also, use a flexible fluid outlet and suction hoses.
Where possible, avoid using solid plumbing, which
carries noise vibrations.
Mount the air motor on resilient rubber pads, rather
than sheet metal.
Determine the minimum air inlet pressure and
pump cycle rate necessary to achieve the desired
spray/dispensing results, or minimum fluid pressure
and flow
. This will result in less system wear and
less overall noise.
Air Motor Icing
Moisture
in the compressed air can collect in the air
motor and freeze, causing the motor to stall. This is
called icing. If icing occurs, shut of
f the air supply and
allow the ice to thaw
.
Model 237–001 Reduced Icing Air Motor allows you to
divert a stream of air over the air valves. This flow of
warm air minimizes water collecting and freezing. The
amount of air is adjustable with a needle valve (88, see
the parts drawing on page 16).
T
o minimize icing, reduce the moisture in your com
-
pressed air supply by using an air dryer or a filter
which traps water
.
The main air line should slope slightly downward so
water will collect at the end of the line, where it can be
drained. Additionally
, plumb each drop line from the top
of the main air line. Install an automatic drain or a drain
valve at the bottom of each drop.
For additional assistance in designing your system,
contact your Graco distributor
.
Auxiliary Air Exhaust (Model 215–255)
An
auxiliary air exhaust line may be connected to
Model 215–255, for use in a header system. Remove
the pipe plug (15, see the parts drawing) from the 1”
npt(f) auxiliary air exhaust port (L) at the top of the
motor
. Connect a 1” npt(m) exhaust
hose (M) to this port. The exhaust port must slope
downward, and the exhaust manifold (N) connection
must be lower than the base of the motor (P), to
prevent moisture from accumulating in the line and
draining back into the motor
. See Fig. 2.
Plug the 17 air exhaust holes (R) in the air motor
cylinder with size 3.5 x 1.3, 13 mm long self-tapping
screws.
02958
Fig. 2
1
3
2
Must
slope downward from motor to exhaust manifold.
Exhaust manifold must be lower than base of motor
.
Plug exhaust holes when using auxiliary air exhaust.
KEY
L
Auxiliary Air Exhaust Port
M
1” npt(m) Air Exhaust Hose
N
Exhaust Manifold
P
Motor Base
R
Location of Air Exhaust Holes
S
Main Air Inlet
L
M
M
N
P
R
S
1
1
2
3
Model 215–255 Shown
