７．Operating Procedure; ７．１ Warning & Caution For Operation; ７．２ Test Working - Yoshitake DP-10 Series Instruction Manual

７．Operating Procedure
７．１ Warning & Caution for Operation
Warning
（１） Prior to letting the application in the system, make sure that all connecting part
are properly connected and there is no danger when the application flows out of
pipe end.
* May result in burn when application blow out.
（２） In case of using high temperature fluid, do not touch the valve directly bare hands.
* May result in burn.
（３） The temperature of coil will be increased when applying current and reach high
temperature, so please do not touch with bare hands.
* May result in burn.
（４） Do not touch at terminal area of electronic wiring (bare live part) for solenoid
valve.
* May result in receiving an electric shock.
（５） Do not tighten hexagon bolts at cap of solenoid valve excessively.
* May result in a leakage because of breakage gasket.
Caution
（１） In case of no operation for a long time, perform test working before start operation
again.
（１）When the product is used with AC voltage, it may produce a buzzing sound depending
on the conditions of use.
７．２ Test Working
Test Working Procedure
When installing new piping or restart the system after shutdown for a long period of
time, close the stop valve in front and after the solenoid valve and remove the
foreign material and scales completely via by-pass line before operation.
（１） Before flow the fluids to solenoid valve, operate 2 to 3 times and confirm the
sound caused by plunger when the coil turns on.
（２） Fully open the stop valve at the outlet side.
（３） Making the solenoid valve into open position, and open the stop valve at the
inlet side gradually up to half opening and confirm the fluids flow to the end
of piping.
（４） Gradually close the stop valve at the outlet side, and confirm the fluids not
to leak from the solenoid valve and connection part of piping.
（５） Making the solenoid valve into close position, and fully open the stop valve
and both inlet and outlet side.
（６） On-off the solenoid valve 2 to 3 times, and confirm the solenoid valve
operate certainly.
（７） Making the solenoid valve into close position, and confirm no leakage at the
end of piping.
In case there is abnormal in some way, take action to improve the situation by
referring to "8.2 Troubleshooting".
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