172-65702M-04 (SQ-C01) 10 Dec 2020
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Initial blowdown of the steam piping and the water piping just before the unit
should be carried out when operating the unit after the unit is shut down for a
long period of time (more than a day). Initial blowdown means the elimination of
condensate remained in the steam piping and the elimination of rusty water in
the water piping. If initial blowdown is not carried out problems such as water
hammer in the steam piping and discharge of rusty water from the water piping
may occur.
2. Operating procedures after the unit is shut down for long periods of time
1) Make sure that all the valves are closed.
2) Open the valve [A] on the cold water inlet piping slowly to supply water.
3) Open the valve [B] on the hot water outlet piping slowly to supply water to
the unit and vent air.
4) Open the valve [C] on the condensate outlet piping so the condensate is
discharged.
5) Close the valve [D] on the steam inlet piping slowly and supply steam.
6) When the pressure reducing valve (DR20) in the unit is not adjusted, open
the pressure reducing valve by slowly turning the handle and adjust to the
designated pressure.
7) Check to make sure that the steam pressure is stable, and adjust the water
temperature.
(Turn the dial on the front of the unit to adjust the temperature.)
8) Check the water temperature and adjust it as needed.
If the unit has not been used for a long period of time, the water temperature
should be carefully checked during operation.
The steam pressure may fluctuate during operation, but it is normal when the
hot water temperature is stable.
3. Temperature adjustment
The water temperature can be adjusted by turning the temperature setting dial.
Temperature set range is as follows:
Standard specification: 30 to 50 °C
High-temperature specification: 40 to 65 °C
(Supply water amount and temperature vary depending on operating conditions.
Refer to the thermal capacity graph.)
When adjusting the water temperature, inform the user(s) in advance that the
temperature will be adjusted and to be careful not to be burned by the hot water
supplied if the temperature has been increased.
Do not operate the dial suddenly or too frequently.
Excessive operation may cause a setting error or malfunction.
