Specifications

6
Control Units 3300-0082, 3300-0087 and 3300-0088
Installation and Operation
Description
The 3300-0082 control unit is designed for proportional
output and automatic pressure compensation of the
outlet valves. When the outlet valves are turned on and
off, the automatic compensation feature holds the
pressure at constant value.
The 3300-0087 and 3300-0088 control units are
designed for the control of pressure and output from 0 to
290 PSI. They are supplied with mounting brackets for
mounting separately from the pump. They consist of a
main pressure regulating valve and 3 on-off outlet
valves. For individual boom section control, model 3300-
0088 includes a main on-off lever that can be put in the
off position for complete bypass to the tank.
Safety Note: Main relief valve bypass must be
connected to the tank directly without restrictions (such
as ball valves).
Model 3300-0082 Installation
The pressure line from the pump is connected to hose barb (1).
The main relief valve (2) outlet is hose barb (3). The pressure
compensation valve (4) outlet is hose barb (5). Both hose barb
(3) and (5) should be connected directly back to the tank without
restrictions. Boom sections are connected to hose barb (6).
Operation
1. Before starting pump, adjust relief valve for the lowest
possible pressure by screwing adjustment knob (2) to its full
up position.
2. Open all boom feed lines by lifting levers (7) to up position.
3. Turn all valve knobs (4) to number 10 on graduated scale.
4. Lift main on-off lever (8) to the full bypass (up) position.
5. Start pump and allow liquid to run through the control unit.
6. Lower main on-off lever to on position (down) and adjust to
the desired spraying pressure by turning knob (2). Turning
knob clockwise will increase pressure.
7. Adjust pressure in each boom feed line separately as follows:
a) Close on boom feed line (7). The pressure will drop.
Adjust compensation valve (4) until pressure gauge reads
required pressure. Reopen boom feed line.
b) Repeat for each boom feed valve.
8. The 3300-0082 control unit is now ready for use. After use,
flush with clean water.
Model 3300-0087 and 3300-0088 Installation
Locate mounting bracket and secure in desired position. The
pressure line from the pump is connected to main inlet hose
barb (1). The return line is connected unrestricted to the main
bypass hose barb (2). Boom sections are connected to the outlet
boom hose barb (3).
Operation
1. Before starting pump, adjust relief valve for the lowest
possible pressure by screwing the pressure adjustment knob
(4) all the way counterclockwise.
2. On Model 3300-0088, turn the main on-off lever (6) to the full
bypass (up) position.
3. Open all boom feed lines by lifting lever(s) to the up position.
4. Start pump and allow liquid to flow through the control unit.
5. Turn main on-off valve lever (6) to on position (down) and
adjust to the desired spraying pressure by turning the
pressure adjustment knob (4). Turning the knob clockwise
will increase the pressure.
6. The 3300-0087 or 3300-0088 control unit is now ready for
use. After each use, flush the unit with water. For extended
or winter storage, drain the unit completely.
Figure 4. Model 3300-0082 Figure 5. Model 3300-0087 and 3300-0088
6. Outlet
5. Constant
Pressure Valve
Bypass
3. Main Relief
Valve Bypass
Open
Closed
8. On
Position
Full Bypass
Position
Pressure
Adjustment Knob
1. Main Inlet
5. Outlet Valve Levers
3. Outlets
to Boom
Sections
6. Main
On-Off Lever
2. Main Bypass
Pressure Gauge
1. Inlet
6. Outlet
4.
7.
7.
L-1381 (Rev. B)