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EPDT-247i
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7. Operating Procedure
Warning
1. Do not touch the coil with bare hands while it is energized.
* Failure to follow this notice may result in burns.
2. Do not touch the product with bare hands when the product is used for hot fluid.
* Failure to follow this notice may result in burns.
3. Before leading fluid, make sure that there is no danger when the fluid flows to the end of piping.
* The fluid outflow may cause physical damage.
* The hot fluid, if spouted out, may scald your skin.
Caution
1. When the product is newly installed or left without being operated for a long time, perform test
working before starting operation.
2. Completely discharge the fluid inside of the product and line before leaving the product not operated
for a long time.
* Failure to follow this notice may cause malfunction due to rust inside of the product and lines, or
result in damage due to freezing.
3. Sudden application of pressure to the product may open the valve instantly and cause leakage.
1. When the product is used with AC voltage, it may produce a buzzing sound depending on the conditions
of use.
7.1 Test working
Before performing test working, be sure to close the stop valves installed at both the inlet and outlet sides
of the product and remove foreign substances and scale completely by flushing the bypass line.
1. Before leading the fluid into the product, switch it on and off a few times and confirm that clicking sound
caused by the plunger when the coil turns on.
2. Fully open the stop valve at the outlet side.
3. With the product at open position, open the stop valve at the inlet side gradually and confirm that the
fluid flows to the end of the piping.
4. Gradually close the stop valve at the outlet side, and confirm the fluid does not leak from the product
or connection parts of the piping joints.
5. With the product at closed position, fully open the stop valves at both the inlet and outlet sides.
6. Switch on and off a few times to confirm that the product opens and closes properly.
7. With the product at closed position, confirm there is no leakage at the end of the piping.
In case of any abnormal condition observed during test working, refer to “8. Maintenance” to take
proper measures and treatment.
8. Maintenance
Since most of the troubles with the product are caused by foreign substances inside of the piping, care should
be taken. Note that any repairs caused by foreign substances or scales are subject to a charge even during the
warranty period.
Warning
Disassembly and maintenance must be done by experienced professional or valve manufacturer.
1. Confirm that no power is supplied before disassembling or maintenance.
* Failure to follow this notice may cause an electric shock.
2. Completely discharge the pressure inside of the product, line and equipment before disassembling or
maintenance and cool down the product till it can be touched with bare hands in the case of high-
temperature fluid.
* Failure to follow this notice may result in injury or burns due to residual pressure.
3. Do not supply electric power to the coil while it is detached from the valve.
* Failure to follow this notice may result in coil burnout or fire due to an overcurrent.
