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8.1 Precaution for operating procedure
1.
Do not touch the product with bare hands in case of high-temperature fluid.
* Doing so may result in burns.
* The coil becomes hot while it is continuously energized even in normal operation.
2.
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.
1.
When the product is newly installed or after the product is not used 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 do so may cause malfunction due to rust inside of the product and line, or result in
damaged 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.
8.2 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 fluid into the product, switch it on and off a few times and confirm the 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 condition, open the stop valve at the inlet side gradually and confirm the
fluid flows to the end of piping.
4. Gradually close the stop valve at the outlet side, and confirm the fluid does not leak from
connection parts of the product or piping.
5. With the product at closed condition, fully open the stop valves at both the inlet and outlet side.
6. Switch on and off the product a few times to confirm it operates correctly.
7. With the product at closed condition, confirm there is no leakage at the end of the piping.
In case of any abnormal condition observed during test working, refer to "9.3 Troubleshooting" to take
proper measures and treatment.
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.
8. Operating Procedure
Warning
Caution
9. Maintenance
9
■EPDT-251b■
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