Graymills DDP 1' Pump OMI - Manual (Page 6)

6
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. Trapped air can cause the pump to cycle unex-
pectedly, which could result in serious injury, including
splashing in the eyes or on the skin, injury from mov-
ing parts, or contamination from hazardous fluids. See
Fig. 2.
1. Install the air line accessories as shown in Fig. 2.
Mount these accessories on the wall or on a bracket.
Be sure the air line supplying the accessories is
grounded.
a. Install an air regulator (C) and gauge to control the
fluid pressure. The fluid outlet pressure will be the
same as the setting of the air regulator.
b. Locate one bleed-type master air valve (B) close
to the pump and use it to relieve trapped air. See
the WARNING at left. 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 a grounded, flexible air hose (A) between the
accessories and the 1/2 npt(f) pump air inlet (N). See
Fig. 2. Use a minimum 3/8” (10 mm) ID air hose.
Screw an air line quick disconnect coupler (D) onto the
end of the air hose (A), and screw the mating fitting
into the pump air inlet snugly. Do not connect the
coupler (D) to the fitting until you are ready to operate
the pump.
04170A
KEY
A Air supply hose
B Bleed-type master air valve
(required for pump)
C Air regulator
D Air line quick disconnect
E Master air valve (for accessories)
F Air line filter
G Fluid suction line
H Fluid supply
J Fluid drain valve (required)
K Fluid shutoff valve
L Fluid line
N 1/2 npt(f) air inlet port
R 1” fluid inlet port
S 1” fluid outlet port
Y Ground wire (required; see page 5
for installation instructions)
Figure 2
FLOOR MOUNT TYPICAL INSTALLATION
Y
J
F B E C
A
D K L
G
H
R
S N