9
■
EPDT-213b
■
6. Operating Procedure
6.1 Precaution for operation
Caution
1. Before leading fluid into the product, close the stop valves at the inlet and outlet of the product and remove
foreign substances and scale from the piping completely by using a bypass line. When blowing fluid via
the bypass line, keep fluid temperature from exceeding the withstand temperature of the product.
* Failure to follow this notice prevents the product from functioning properly due to the ingress of foreign
substances and scale into the product. Applying fluid exceeding the withstand temperature makes the
spindle bent and unusable.
2.
Adjust set temperature while watching the thermometer with enough time.
*
Failure to follow this notice hampers correct temperature regulation.
3. Before stopping operation of the product for an extended period, completely discharge the fluid inside the
product and piping, and close the stop valves installed at before and after the product.
* Failure to follow this notice may cause malfunction due to rusting inside the product and piping.
4. If condensate accumulates while the product closes, install a trap to discharge the condensate.
*Failure to follow this notice may cause malfunction due to rusting inside the product and the pipes.
6.2 Adjustment
Taking a wrong adjusting procedure may cause hunting, scale problems or water hammer, and can heavily
damage the main parts of the product. Be sure to follow the procedure below.
1.
Close the stop valves at the inlet and outlet sides of the product. Open the bypass stop valve and
blow fluid through the bypass line with enough time. After discharging, be sure to close the bypass
stop valve.
2.
Turn the handle [12] and move the indicator to the desired temperature position on the scale. To
raise the temperature, turn the handle clockwise (to direction of the “H” position). To lower the
temperature, turn it counterclockwise (to direction of the “L” position).
3.
Slowly open the inlet stop valve to its full open position, and then, open the outlet stop valve little
by little to its full open position.
4.
Adjust the handle till the desired temperature is obtained while watching the thermometer with
enough time.
[Scale reading and set temperature]
Scale reading
OB-30, OB-30U (for heating)
0-35°C
25-70°C
40-100°C
60-130°C
70-150°C
0
-10°C
14°C
28°C
–
–
1
5°C
30°C
47°C
58°C
67°C
2
20°C
46°C
66°C
81°C
91°C
3
31°C
62°C
86°C
105°C
119°C
4
42°C
78°C
106°C
132°C
162°C
Scale reading
OB-31, OB-31U (for cooling)
0-35°C
25-70°C
40-100°C
0
–
–
–
1
-14°C
11°C
23°C
2
9°C
38°C
55°C
3
32°C
65°C
94°C
4
55°C
98°C
141°C
•
The tables above show the set temperature per scale reading as a guide. Because the
temperature varies slightly according to the conditions of use, adjust the handle till the desired
temperature is obtained.
Warning
When the product is used for hot fluid, do not touch the product with bare hands.
* The product having hot fluid may scald your skin.
