This product is designed for indoor installation. Do not install the product in the following places

• Places subject to vibration or water hammer, piping
• Locations where it is difficult to read the meter or where it is exposed to direct sunlight
• Places submerged, flooded, or exposed to water, places with poor ventilation at all times, or places where moisture causes condensation
• Locations where equipment prone to noise surges is located, or where strong electric or magnetic fields are applied, such as directly under high-voltage lines
• Places where oil (kerosene, fuel oil, etc.), dust, or corrosive gases are present.
• Where the ambient temperature exceeds 60°C (140°F) or falls below -10°C (-40°F).
• Where the ambient humidity exceeds 90%RH
• Locations where mounting and dismounting are difficult or where there is no space for maintenance and inspection

• Wiring work must be performed in compliance with the Electrical Equipment Technical Standards, internal wiring regulations, the Electrician Law, and the Fire Service Law.
• Do not cut or extend the flow sensor or temperature sensor cables.
• Separate the flow sensor and temperature sensor cables from the power and power lines of other equipment.
• Install the temperature sensor on the piping with the feed side on the heat load inlet side and the return side on the heat load outlet side as indicated by the label on the signal line.
• For the AC type, insert the power plug into the outlet after all installation work is completed.
• Match the serial numbers of the calculation unit and temperature sensor.

The performance and durability of the totalizing calorimeter will vary depending on whether the piping is good or bad. Pay attention to the following points when installing the unit.
If the flow of cold and hot water can be stopped, refer to Piping Example 1; if not, refer to Piping Example 2.

• Do not install the volumetric measuring unit in a location where it may freeze.
• Do not install in a location where air remains in the volume measuring section.
• Install the volumetric measuring unit on the return side.
• Install the volumetric measuring section on a level surface. The electromagnetic type can be installed in vertical piping.
• Install the volumetric measuring section in a location where water pressure fluctuation is minimal.
• When welding pipes, remove the volume measuring section.
• Remove the volumetric measuring section when flushing the inside of the piping.
• Install maintenance valves upstream and downstream of the temperature sensor on the feed side.
• Install a straight pipe at least 5 times the bore diameter upstream of the volumetric measuring section and a strainer (recommended 40 mesh) upstream of the strainer.
• Install maintenance valves upstream of the strainer and downstream of the temperature sensor on the return side, and install a drain valve to drain the cold and hot water between the strainer and the sensor.
• Provide a bypass throughout from the strainer to the return side temperature sensor and install a valve on the bypass.
• If water meters, etc., are installed in the same pipe shaft, install the volumetric measuring section at a higher position than the water meters, etc., so that water will not splash on the flow sensor section when the water meters, etc., are replaced.
• The temperature sensor and the volumetric meter should be installed near the heat load.
• The temperature sensor insertion port of the temperature-sensing section should be facing upward.
• Attach a heat insulator to the volume measuring section (metal part).
• Do not attach a heat insulator to the upper part (plastic case) of the volumetric measuring unit.