Empty and Flush Entire System
54 3A2776K
Empty and Flush Entire System
Only perform this procedure when:
• The system will not be used for more than one
month.
• Changing to a new material in the A or B side.
To flush a new system, see Initial Startup on page 30.
To flush only the mix manifold to the gun, see Flush
Mixed Material, page 44.
NOTE: While hot water is sometimes used to flush
mixed material from the system, it is not recommended
for flushing the entire system. When flushing the entire
system, use a solvent that dissolves the material.
This procedure is designed to minimize the volume of
discarded A and B material when emptying and flushing
the entire system.
1. Flush Mixed Material, page 44.
2. If applicable, remove the feed pump from pail:
a. With director valve (DC) in the neutral position
and the RAM air regulator (DB) backed out,
slide main air slider valve (DA) ON.
b. Lift the director valve to the UP position, then
press and hold the blowoff button (DD) while
increasing the air pressure using the RAM air
regulator. When the feed pump exits the pail,
move the director valve to the neutral position
and release the blowoff button.
3. Empty the feed pump outlet material lines to the
tank:
a. Slide the air motor slider valve (DF) ON.
b. Rotate air motor regulator (DE) to increase air
pressure until feed pump begins to cycle.
Continue until all material from outlet line to the
tank have been pushed into the tank. This will
be noticeable by an increase in feed pump cycle
rate.
4. Make sure all heaters are off and cool.
5. Close the circulation valves.
To avoid fire and explosion:
• Flush equipment only in a well-ventilated area
• Ensure main power is off and heater is cool before
flushing
• Do not turn on heater until fluid lines are clear of
solvent
• Always ground equipment and waste container
• Always flush at the lower possible pressure
FIG. 39: Feed Pump Air Controls
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