8
■
EPDT-258b
■
5.3 Installation of Thermal bulb
(1) Avoid bending the capillary tube at a sharp angle, twisting or pulling it with force. Secure the capillary tube
not to allow it touch steam piping or any other of high temperature.The bend radius of the capillary tube
should be more than 40 mm.
(2) Make sure that more than 3/4 of its total length is in direct contact with the fluid to be heated.
(3) Install a thermometer close to the thermal bulb.
(4) If the thermal bulb is to be inserted into a pipe to detect temperature, install it in a place where the
circulation is the best.
(5) To install the thermal bulb, first remove the mating flange bolts and screw in the screwing flange, then insert
the thermal bulb, align it with the hole of the mating flange and fasten the bolts evenly. When doing this,
make sure that the capillary tube is not twisted.
(6) Install a thermal bulb in a posture in which the top of thermal bulb is higher than the other side (connecting
part to the tube), and in which the marking (on flange or nut) is always at highest position.
(7) Make sure that the thermal bulb's joint section does not incline downward and does not become lower than
its tip. Plumb it in a way that makes the T mark position of the flange or joint nut come to the top. Note that if
the installation angle is 90 degrees or 30 degrees or more against the horizontal pipe, the installation
posture does not affect the function even if the installation is made regardless of the T mark position. (See
the diagram below showing an example of thermal bulb insertion.)
Thermal bulb installation example
5.4 Warnings and Cautions for Use
Warning
(1) In case of high temperature fluid, do not touch the product directly with bare hands.* There is danger of
scald.
(2) Do not fasten the gasket of the product additionally.
* The gasket may break and external leakage may occur.
Caution
(1) When supplying air or water to the product, make sure to close the stop valves at the front and the rear of
the product and remove foreign substances, scale, etc. completely through the bypass pipe. When
blowing, do not increase the temperature higher than the heat resistance temperature.
* If foreign substances, scale, etc. enter the product, the original performance of the product is not achieved.
If the temperature becomes higher than the heat resistance temperature, the valve shaft bends and
becomes unusable.
(2) To adjust the temperature, take your time to do so, watching the thermometer.
* Otherwise, correct adjustment is not obtained.
(3) If the product is left unused for a long time, completely drain the fluid from the product or pipes and close
the stop valves at the front and the rear of the product.
* Otherwise, rust may be formed in the product or pipes, causing malfunction of the product.
(4) If drain stays in the product when closing the valves, install a trap and discharge the drain.
* Otherwise, rust may be formed in the product or pipes, causing malfunction of the product.