AB-6880
3
CAUTION
(2/2)
•
All wiring must comply with applicable codes and ordinances.
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Install the product in the proper position as specified in this manual.
Excessively tight connection to a pipe or improper installation position might damage the product.
•
Use full gaskets for the flat face flanges.
Failure to do so might damage the valve or cause fluid leakage.
•
When installing the product with flange gasket, do not allow the flange gasket to go inside the pipe.
Doing so might cause incorrect measurement and control of flow.
•
Do not use rubber gaskets.
Doing so might cause incorrect measurement and control of flow.
•
After installation, make sure no fluid leaks from the valve-pipe connections.
Incorrect installation might cause fluid leakage.
•
Do not allow any foreign objects inside the pipes during installation. Flush the piping to remove the foreign objects
after installation.
Foreign objects inside the piping might damage the product.
•
Install the valve to the pipe so that they are electrically connected at the same potential. If the valve and the pipe
are electrically isolated, noise will be generated, causing incorrect measurement and control of flow.
•
Do not put load or weight on the actuator of the product.
Doing so might damage the product.
•
Do not carelessly touch the product when being used to control hot water.
Its temperature becomes high, and you might get burned.
•
To connect the wires to the screw terminals, use crimp terminal lugs with insulation.
Failure to do so might cause short circuit or electric shock.
•
Firmly tighten the terminal screws.
Insufficient tightening of the terminal screws might cause overheating or fire.
•
Be sure to provide a circuit breaker for the power to the product as the product does not have a power switch.
•
Do not measure insulation resistance or withstand voltage of the product.
Doing so might cause accident or device failure.
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Do not touch the moving parts of the product.
Doing so might cause injury.
•
Do not disassemble the product.
Doing so might cause electric shock or device failure.
•
Dispose of the product as industrial waste in accordance with your local regulations.
Do not reuse all or part of this product.
IMPORTANT:
•
This product is applicable only to chilled/hot water control. If the product is used to control any other medium
such as brine or air, flow rate cannot be measured or controlled.
•
Install the valve so that the flow direction of process fluid agrees with the arrow indicated on the valve body. If
the flow direction is opposite to the arrow, correct measurement and control of flow is not assured.
•
The actuator mounting position onto the valve cannot be changed. Therefore, do not loosen the yoke fixing
screws and the actuator fixing screws. Loose fixing screws lower flow measuring accuracy.
•
Flow measuring accuracy in the subsection
Measuring range and accuracy
shown later is for the valve
sensor measuring 7 to 17
°
C and 45 to 65
°
C ranges, 0.1 to 0.8 MPa pipe pressure, and 0.03 to 0.3 MPa
differential pressure. Without these ranges, the flow rate measuring accuracy may lower.
•
To keep flow measuring accuracy, control the quality of process fluid (water), and do not allow rust or foreign
object inside the valve. Rust or foreign object inside the valve lowers flow measuring accuracy.
