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Operation and Maintenance
Pressure Relief Procedure
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
D are instructed to relieve the pressure,
D stop spraying,
D check or service any of the system equipment,
D or install or clean the spray tip/nozzle.
1. Lock the gun trigger safety.
2. Shut off the air to the feed pumps.
3. Turn off the power (air or electric motor switch) to
the proportioning pump.
4. Close the gun manifold fluid valves.
5. Unlock the spray gun trigger safety.
6. Hold a metal part of the gun firmly to the side of a
grounded metal pail, then trigger the gun to relieve
pressure.
7. Lock the trigger safety again.
8. Open both fluid filter drain valves; have a container
ready to catch the draining fluid.
9. If you suspect that the spray tip/nozzle or hose is
completely clogged, or that pressure has not been
fully relieved after following the steps above, very
slowly loosen the tip/nozzle retaining nut or hose
end coupling to relieve pressure gradually, then
loosen completely. Wear protective gloves to avoid
skin injection or burns. Now clear the tip/nozzle or
hose.
10. Be sure the fluid is cool before disconnecting the
hoses.
Operation
WARNING
INJECTION HAZARD
Never operate the hose when it is coiled.
A coiled hose creates excessive heat
buildup which can result in hose rupture
and cause serious injury, including injection. The
high heat can also cause poor foam development.
Refer to your system manual for complete startup and
operating instructions.
Maintenance
WARNING
INJECTION HAZARD
Do not mend or repair any part of a hose
assembly. If the hose is damaged,
replace it immediately to avoid serious
injury from fluid injection and electric shock.
If a section of hose is not heating, be sure the connec-
tor at the hose control box is firmly plugged in. If that
does not correct the problem, relieve the fluid pressure
in the sprayer and hoses, as instructed at left. Remove
the abrasion cover and the insulation tubing on each
end of the hose in question. Make sure the heat tape
connections are secure and repeat the continuity
check in Step 6, page 6. If the hose is faulty or the
problem not corrected, replace the hose.
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