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EPDT-258b
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5. Maintenance and Inspection
5.1
Cautions before use
Caution
(1) Do not disassemble the product without reason.
* If you disassemble the product for no reason, the original performance of the product is not achieved.
(2) When plumbing the product, make sure to remove foreign substances, scale, etc. from the pipes.
* If foreign substances, scale, etc. enter the product, the original performance of the product is not achieved.
(3) Make sure to install a strainer (60 to 80 mesh) on the inlet side of the product.
* If foreign substances, scale, etc. enter the product, the original performance of the product is not achieved.
(4) Install pressure gauges on the inlet and outlet sides of the product to confirm the operation of the
product.
* Otherwise, the temperature is not adjusted correctly and, therefore, the original performance of the product
is not achieved.
(5) To install the product, confirm the inlet, outlet and posture of the product.
* If the product is installed in a wrong way, it may not perform its original functions.
(6) Install the product in a place where the temperature does not exceed the preset temperature.
* If the ambient temperature becomes higher than the present temperature, the temperature cannot be
adjusted correctly.
(7) Install a thermometer near the thermal bulb.
* Otherwise, the temperature cannot be adjusted correctly.
(8) Install the thermal bulb in a way that makes three fourths or more of its total length come into contact with
the fluid to be heated.
* Otherwise, the temperature cannot be adjusted correctly and the original performance of the product is not
achieved.
(9) Make sure that the installation posture of the thermal bulb is correct. If there are T marks on the flanges
or joint nuts, follow the instructions on how to install them.
* Otherwise, the temperature cannot be adjusted correctly.
(10) The bending radius of the capillary tube must be 40 mm or more. Do not bend it at an acute angle, nor
twist it or pull it forcibly.
* Otherwise, the capillary tube may be damaged and the original performance of the product is not
achieved.
(11) Make sure that the capillary tube is not in contact with the steam pipe.
* Otherwise, the temperature cannot be adjusted correctly and the original performance of the product is not
achieved.
(12) Install pipes in a way that does not add excessive load, bending force, vibration, etc. on the product.
* Otherwise, the product may not function correctly or the service life of the product may be extremely
shortened.
5.2 Installation of Main Unit
(1) Install the temperature regulator valve vertically against the horizontal pipe, placing its frame above.
(2) If the ambient temperature becomes higher than the preset temperature, it may cause malfunction of the
product, so install the product in a place where the temperature does not exceed the preset temperature.
(3) Make sure to install a pressure gauge and a strainer bypass pipe in the piping. (See 6.6 Piping Diagram.)
(4) If the pressure of the heating fluid is higher than the maximum pressure, use the product after reducing the
pressure with the pressure reduction valve, etc.
(5) Implement the plumbing in a way that does not add excessive load, bending force, vibration, etc. to the
main unit.
(6) If the product is to be left unused for a long time, completely drain the pipes and close the gate valves at the
front and the rear of the temperature adjustment valve.
(7) When supplying air or water, make sure to remove foreign substances from the pipes through the bypass
pipe and then open the temperature adjustment valve circuit.