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11. Do not apply excessive torque when installing the product.
Use the torque specified below for screwing in the pipe to avoid the product malfunction.
◼ Tightening torque (N∙m)
Nominal size
Tightening torque
12. If the surface temperature of the actuator cover exceeds 55°C due to radiant heat, equip the cover
with an insulating board appropriately.
13. Installation posture
・ Install the product vertically or horizontally including intermediates, but not with the actuator
downward.
・ Secure the space of at least 150 mm above the actuator for maintenance.
5.2 Precaution for operation
Warning
2. After checking that the appropriate power voltage is supplied, connect the wires according to wiring
diagram shown on the sticker on the actuator. Do not connect the wire to the switch signal terminal
unless it is necessary.
3. The product is equipped with a reliable screw terminal block.
Make a cut around the insulation of the wire by 5.5 mm from the edge, and connect it to the terminal.
4. Take measures against electric shock, such as using an earth cable.
For internal use of the actuator, use earth screws only.
5. After wiring completed, fix a rubber gasket to the actuator cover firmly to prevent water ingress.
6. While the product operates, follow the instructions below.
• Keep the product energized constantly because it has a built-in space heater for dew condensation
prevention.
• Do not place hands around the moving parts (connector) while the product operates.
7. Before operating, confirm that wiring and power voltage are correct. Then perform test working to
check if the product operates properly.
8. Confirm the product operating conditions.
• Check that the opening/closing frequency of the valve is within the duty factor of "20% 15 min."
Using the product at a duty factor beyond specified may cause deterioration or burnout of the
product.
• The duty factor indicates the ratio of working time to total time of a valve which opens/closes intermittently.
"20% 15 min." indicates that the product is capable of switching opening/closing operation
continuously or intermittently for the total of 3 min. (20% of 15 min.) during a 15-minute operation.
Frequency of switching opening/closing operation can be calculated from the duty factor.
• Do not apply reverse rotation signal to the product during its opening/closing operation.
*Failure to follow this notice shortens the service life of the product.
15A
25-35
OK
NG
1. 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.
20A
25A
40-50
50-60
Installation posture
9
32A
40A
60-80
75-85
90-110
50A
■EPDT-191a■
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